共用题干The Greatest Mystery of WhalesThe whale is a warm-blooded,air-breathing animal,giving birth to its young alive,sucking them-and, like all mammals,originated on land.There are many______(51)of this.Its front flippers（鳍状肢）, used for steering and stability,are traces of feet.Immense strength is______(52)into the great body of the big whales,and in fact most of a wha'e'sbo衡is one gigantic muscle.The blue whale's pulling strength has been estimated______(53) 400 horsepower.One specimen was reported to have towed（拖）a whaling vessel for seven hours at the______ (54)of eight knot（节）.An angry whale will______(55).A famous example of this was the fate of Whaler Essex,______(56)was sunk off the coast of South America early in the last century.More recently,steel shipshave ___________( 57 ) their plates buckled（使弯曲）in the same way.Sperm whales（抹香鲸）were known to seize the old-time whaleboats in their jaws and crush them.The greatest______(58)of whales is their diving ability.The sperm whale dives to the bottom for his ______(59)food,the octopus（章鱼）.In that search he is known to go as far down as 3,200 feet,where the ______(60)is 1 ,400 pounds to a square inch.Doing so he will______(61)underwater as long as one hour.Two special1 skills are involved in this storing up enough______(62)(all whales are air-breathed ) and tolerating the great change in pressure.Just how he does it scientists have not______(63).It is believed that some of the oxygen is stored in a special______(64)of blood vessels,rather than just held in the lungs.And it is believed that a special kind of oil in his head is some sort of a compensating mechanism that ______(65)adjusts the internal pressure of his body.But since you can't bring a live whale into the laboratory for study,no one knows just how these things work.62._________A:heat B:energy C:foodD:oxygen
共用题干
The Greatest Mystery of Whales
The whale is a warm-blooded,air-breathing animal,giving birth to its young alive,sucking them-and, like all mammals,originated on land.There are many______(51)of this.Its front flippers（鳍状肢）, used for steering and stability,are traces of feet.
Immense strength is______(52)into the great body of the big whales,and in fact most of a wha'e'sbo衡is one gigantic muscle.The blue whale's pulling strength has been estimated______(53) 400 horsepower.One specimen was reported to have towed（拖）a whaling vessel for seven hours at the______ (54)of eight knot（节）.
An angry whale will______(55).A famous example of this was the fate of Whaler Essex,______(56)was sunk off the coast of South America early in the last century.More recently,steel ships
have ___________( 57 ) their plates buckled（使弯曲）in the same way.Sperm whales（抹香鲸）were known to seize the old-time whaleboats in their jaws and crush them.
The greatest______(58)of whales is their diving ability.The sperm whale dives to the bottom for his ______(59)food,the octopus（章鱼）.In that search he is known to go as far down as 3,200 feet,where the ______(60)is 1 ,400 pounds to a square inch.Doing so he will______(61)underwater as long as one hour.Two special1 skills are involved in this storing up enough______(62)(all whales are air-breathed ) and tolerating the great change in pressure.Just how he does it scientists have not______(63).It is believed that some of the oxygen is stored in a special______(64)of blood vessels,rather than just held in the lungs.And it is believed that a special kind of oil in his head is some sort of a compensating mechanism that ______(65)adjusts the internal pressure of his body.But since you can't bring a live whale into the laboratory for study,no one knows just how these things work.
The Greatest Mystery of Whales
The whale is a warm-blooded,air-breathing animal,giving birth to its young alive,sucking them-and, like all mammals,originated on land.There are many______(51)of this.Its front flippers（鳍状肢）, used for steering and stability,are traces of feet.
Immense strength is______(52)into the great body of the big whales,and in fact most of a wha'e'sbo衡is one gigantic muscle.The blue whale's pulling strength has been estimated______(53) 400 horsepower.One specimen was reported to have towed（拖）a whaling vessel for seven hours at the______ (54)of eight knot（节）.
An angry whale will______(55).A famous example of this was the fate of Whaler Essex,______(56)was sunk off the coast of South America early in the last century.More recently,steel ships
have ___________( 57 ) their plates buckled（使弯曲）in the same way.Sperm whales（抹香鲸）were known to seize the old-time whaleboats in their jaws and crush them.
The greatest______(58)of whales is their diving ability.The sperm whale dives to the bottom for his ______(59)food,the octopus（章鱼）.In that search he is known to go as far down as 3,200 feet,where the ______(60)is 1 ,400 pounds to a square inch.Doing so he will______(61)underwater as long as one hour.Two special1 skills are involved in this storing up enough______(62)(all whales are air-breathed ) and tolerating the great change in pressure.Just how he does it scientists have not______(63).It is believed that some of the oxygen is stored in a special______(64)of blood vessels,rather than just held in the lungs.And it is believed that a special kind of oil in his head is some sort of a compensating mechanism that ______(65)adjusts the internal pressure of his body.But since you can't bring a live whale into the laboratory for study,no one knows just how these things work.
62._________
A:heat
B:energy
C:food
D:oxygen
A:heat
B:energy
C:food
D:oxygen
参考解析
解析：第一段讲到鲸鱼和所有其他哺乳动物一样来源于陆地，最后一句举了一些例子来说明这一点。sign的意思是“符号，特征，迹象”，而空白处所在句是说有很多迹象表明鲸鱼来自陆地，故选B项。aspect方面，层面；way方法，方式；reason原因。
build into…的意思是“使……成为……的组成部分”，这里指鲸鱼具有巨大的力气。其他几个选项意思上讲不通。work工作，运行；divide划分；build建立，逐渐增强；move移动。
at表示“（速度、比率等）以，达”; horsepower表示“马力”。
rate表示“速度”，而空格后的“knot”是速度单位，表示每小时一海里，选D意思才讲得通。
此题必须根据上下文的意思来做。由后文中捕鲸船被击沉、钢船被击毁的事例可知，鲸鱼被惹怒后会攻击船只，所以选B0 abandon放弃；attack攻击；leave离开；board登（机），上（船）。
这里是一非限制性定语从句，先行词为物，并且关系代词作主语，应用which来引导，故选C。
" have sth.done”是常用表达，表示某事被做。operate操作；see看到，看见；catch抓住。
本题所在句子为该段主题句，谈的是鲸鱼的潜水能力。鲸鱼的潜水能力很强，能下潜到很深的地方并在水下停留长达1个小时之久，科学家们不解，所以说是个谜，故选D。 interest兴趣;job工作；danger危险，危害；mystery谜。
虽然本题的几个选项都能与food搭配，但从上下文意思来讲，只有A正确。favorit。最喜爱的；fast快速地；new新的；sufficient充足的。
空格后面说的是每平方英寸1400磅，用的是压强单位，故选B0 depth深度；pressure压强；level水平；size尺寸。
待在水下要用动词remain，其他几个动词放入空格处意思讲不通。set设置；become变为；remain保持，逗留；rest休息。
此题也必须在读懂上下文意思的基础上才能作出判断，这里指鲸鱼储存氧气，故选D。heat热量；energy能量；food食物；oxygen氧气。
这里是说关于鲸鱼为什么能够在水下承受巨大的压力，科学家们还没有找到答案。选项中的determine的意思是“确定”，此词放入空格处意思讲得通，其他几个选项讲不通，故选B。witness见证；apply运用；calculate计算。
special虽然和几个选项都能搭配使用，但只有选项A意思上讲得通，故A为正确答案，此处是指氧气储存在特殊的血管系统中。system系统；place地方；arrangement安排；equipment设备。
此题亦需根据上下文的意思作出判断。automatically的意思是“自动地”。mentally心理上地；artificially人工地；manually手工地。
build into…的意思是“使……成为……的组成部分”，这里指鲸鱼具有巨大的力气。其他几个选项意思上讲不通。work工作，运行；divide划分；build建立，逐渐增强；move移动。
at表示“（速度、比率等）以，达”; horsepower表示“马力”。
rate表示“速度”，而空格后的“knot”是速度单位，表示每小时一海里，选D意思才讲得通。
此题必须根据上下文的意思来做。由后文中捕鲸船被击沉、钢船被击毁的事例可知，鲸鱼被惹怒后会攻击船只，所以选B0 abandon放弃；attack攻击；leave离开；board登（机），上（船）。
这里是一非限制性定语从句，先行词为物，并且关系代词作主语，应用which来引导，故选C。
" have sth.done”是常用表达，表示某事被做。operate操作；see看到，看见；catch抓住。
本题所在句子为该段主题句，谈的是鲸鱼的潜水能力。鲸鱼的潜水能力很强，能下潜到很深的地方并在水下停留长达1个小时之久，科学家们不解，所以说是个谜，故选D。 interest兴趣;job工作；danger危险，危害；mystery谜。
虽然本题的几个选项都能与food搭配，但从上下文意思来讲，只有A正确。favorit。最喜爱的；fast快速地；new新的；sufficient充足的。
空格后面说的是每平方英寸1400磅，用的是压强单位，故选B0 depth深度；pressure压强；level水平；size尺寸。
待在水下要用动词remain，其他几个动词放入空格处意思讲不通。set设置；become变为；remain保持，逗留；rest休息。
此题也必须在读懂上下文意思的基础上才能作出判断，这里指鲸鱼储存氧气，故选D。heat热量；energy能量；food食物；oxygen氧气。
这里是说关于鲸鱼为什么能够在水下承受巨大的压力，科学家们还没有找到答案。选项中的determine的意思是“确定”，此词放入空格处意思讲得通，其他几个选项讲不通，故选B。witness见证；apply运用；calculate计算。
special虽然和几个选项都能搭配使用，但只有选项A意思上讲得通，故A为正确答案，此处是指氧气储存在特殊的血管系统中。system系统；place地方；arrangement安排；equipment设备。
此题亦需根据上下文的意思作出判断。automatically的意思是“自动地”。mentally心理上地；artificially人工地；manually手工地。
相关考题：
共用题干The Greatest Mystery of WhalesThe whale is a warm一blooded,air-breathing animal,giving birth to its young alive,sucking them一and, like all mammals,originated on land. There are many________________(51)of this. Its front flippers（鳍状肢）, used for steering and stability,are traces of feet.Immense strength is________________(52)into the great body of the big whales,and in fact most of a whale's body is one gigantic muscle.The blue whale's pulling strength has been estimated________________(53) 400 horsepower. One specimen was reported to have towed（拖）a whaling vessel for seven hours at the _______________ (54)of eight knot（节）.An angry whale will________________(55).A famous example of this was the fate of Whaler Essex, ________________(56)was sunk off the coast of South America early in the last century. More recently,steel ships have ___________( 57 ) their plates buckled（使弯曲）in the same way. Sperm whales（抹香鲸）were known to seize the old-time whaleboats in their jaws and crush them.The greatest________________(58)of whales is their diving ability.The sperm whale dives to the bottom foi his________________(59)food,the octopus（章鱼）.In that search he is known to go as far down as 3 , 200 feet, where the________________(60)is 1,400 pounds,to a square inch.Doing so he will________________(61)underwa-ter as long as one hour. Two special skills are involved in this storing up enough________________(62)(allwhales are air-breathed)and tolerating the great change in pressure.Just how he does it scientists have nol_______________ (63).It is believed that some of the oxygen is stored in a special________________(64)of blood vessels,rather than just held in the lungs.And it is believed that a special kind of oil in his head is some sort of a compensating mechanism that________________(65)adjusts the internal pressure of his body.But since you can't bring a live whale into the laboratory for study,no one knows just how these things work._________(63)A:witnessedB:determinedC:appliedD:calculated
共用题干The Greatest Mystery of WhalesThe whale is a warm-blooded,air-breathing animal,giving birth to its young alive,sucking them-and, like all mammals,originated on land.There are many______(51)of this.Its front flippers（鳍状肢）, used for steering and stability,are traces of feet.Immense strength is______(52)into the great body of the big whales,and in fact most of a whale's body is one gigantic muscle.The blue whale's pulling strength has been estimated______(53) 400 horsepower.One specimen was reported to have towed（拖）a whaling vessel for seven hours at the ______(54)of eight knot（节）.An angry whale will______(55).A famous example of this was the fate of Whaler Essex, ______(56)was sunk off the coast of South America early in the last century.More recently,steel ships have______( 57 ) their plates buckled（使弯曲）in the same way.Sperm whales（抹香鲸）were known to seize the old-time whaleboats in their jaws and crush them.The greatest______(58)of whales is their diving ability.The sperm whale dives to the bottom for his______( 59 ) food , the octopus（章鱼）.In that search he is known to go as far down as 3 , 200 feet, where the______(60)is 1,400 pounds to a square inch.Doing so he will______(61) underwater as long as one hour.Two special skills are involved in this storing up enough______(62) (all whales are air-breathed)and tolerating thern great change in pressure.Just how he does it scientists have not______(63).It is believed that some of the oxygen is stored in a special ______(64)of blood vessels,rather than just held in the lungs.And it is believed that a special kind of oi1 in his head is some sort of a compensating mechanism that______(65)adjusts the internal pressure of his body.But since you can't bring a live whale into the laboratory for study,no one knows just how these things work.64._________A:system B:place C:arrangement D:equipment
共用题干The Greatest Mystery of WhalesThe whale is a warm一blooded,air-breathing animal,giving birth to its young alive,sucking them一and, like all mammals,originated on land. There are many________________(51)of this. Its front flippers（鳍状肢）, used for steering and stability,are traces of feet.Immense strength is________________(52)into the great body of the big whales,and in fact most of a whale's body is one gigantic muscle.The blue whale's pulling strength has been estimated________________(53) 400 horsepower. One specimen was reported to have towed（拖）a whaling vessel for seven hours at the _______________ (54)of eight knot（节）.An angry whale will________________(55).A famous example of this was the fate of Whaler Essex, ________________(56)was sunk off the coast of South America early in the last century. More recently,steel ships have ___________( 57 ) their plates buckled（使弯曲）in the same way. Sperm whales（抹香鲸）were known to seize the old-time whaleboats in their jaws and crush them.The greatest________________(58)of whales is their diving ability.The sperm whale dives to the bottom foi his________________(59)food,the octopus（章鱼）.In that search he is known to go as far down as 3 , 200 feet, where the________________(60)is 1,400 pounds,to a square inch.Doing so he will________________(61)underwa-ter as long as one hour. Two special skills are involved in this storing up enough________________(62)(allwhales are air-breathed)and tolerating the great change in pressure.Just how he does it scientists have nol_______________ (63).It is believed that some of the oxygen is stored in a special________________(64)of blood vessels,rather than just held in the lungs.And it is believed that a special kind of oil in his head is some sort of a compensating mechanism that________________(65)adjusts the internal pressure of his body.But since you can't bring a live whale into the laboratory for study,no one knows just how these things work._________(58)A:interestB:jobC:dangerD:mystery
共用题干The Greatest Mystery of WhalesThe whale is a warm-blooded,air-breathing animal,giving birth to its young alive,sucking them-and, like all mammals,originated on land.There are many______(51)of this.Its front flippers（鳍状肢）, used for steering and stability,are traces of feet.Immense strength is______(52)into the great body of the big whales,and in fact most of a whale's body is one gigantic muscle.The blue whale's pulling strength has been estimated______(53) 400 horsepower.One specimen was reported to have towed（拖）a whaling vessel for seven hours at the ______(54)of eight knot（节）.An angry whale will______(55).A famous example of this was the fate of Whaler Essex, ______(56)was sunk off the coast of South America early in the last century.More recently,steel ships have______( 57 ) their plates buckled（使弯曲）in the same way.Sperm whales（抹香鲸）were known to seize the old-time whaleboats in their jaws and crush them.The greatest______(58)of whales is their diving ability.The sperm whale dives to the bottom for his______( 59 ) food , the octopus（章鱼）.In that search he is known to go as far down as 3 , 200 feet, where the______(60)is 1,400 pounds to a square inch.Doing so he will______(61) underwater as long as one hour.Two special skills are involved in this storing up enough______(62) (all whales are air-breathed)and tolerating thern great change in pressure.Just how he does it scientists have not______(63).It is believed that some of the oxygen is stored in a special ______(64)of blood vessels,rather than just held in the lungs.And it is believed that a special kind of oi1 in his head is some sort of a compensating mechanism that______(65)adjusts the internal pressure of his body.But since you can't bring a live whale into the laboratory for study,no one knows just how these things work.53._________A:at B:in C:of D:with
共用题干The Greatest Mystery of WhalesThe whale is a warm一blooded,air-breathing animal,giving birth to its young alive,sucking them一and, like all mammals,originated on land. There are many________________(51)of this. Its front flippers（鳍状肢）, used for steering and stability,are traces of feet.Immense strength is________________(52)into the great body of the big whales,and in fact most of a whale's body is one gigantic muscle.The blue whale's pulling strength has been estimated________________(53) 400 horsepower. One specimen was reported to have towed（拖）a whaling vessel for seven hours at the _______________ (54)of eight knot（节）.An angry whale will________________(55).A famous example of this was the fate of Whaler Essex, ________________(56)was sunk off the coast of South America early in the last century. More recently,steel ships have ___________( 57 ) their plates buckled（使弯曲）in the same way. Sperm whales（抹香鲸）were known to seize the old-time whaleboats in their jaws and crush them.The greatest________________(58)of whales is their diving ability.The sperm whale dives to the bottom foi his________________(59)food,the octopus（章鱼）.In that search he is known to go as far down as 3 , 200 feet, where the________________(60)is 1,400 pounds,to a square inch.Doing so he will________________(61)underwa-ter as long as one hour. Two special skills are involved in this storing up enough________________(62)(allwhales are air-breathed)and tolerating the great change in pressure.Just how he does it scientists have nol_______________ (63).It is believed that some of the oxygen is stored in a special________________(64)of blood vessels,rather than just held in the lungs.And it is believed that a special kind of oil in his head is some sort of a compensating mechanism that________________(65)adjusts the internal pressure of his body.But since you can't bring a live whale into the laboratory for study,no one knows just how these things work._________(53)A:atB:inC:ofD:with
共用题干The Greatest Mystery of WhalesThe whale is a warm一blooded,air-breathing animal,giving birth to its young alive,sucking them一and, like all mammals,originated on land. There are many________________(51)of this. Its front flippers（鳍状肢）, used for steering and stability,are traces of feet.Immense strength is________________(52)into the great body of the big whales,and in fact most of a whale's body is one gigantic muscle.The blue whale's pulling strength has been estimated________________(53) 400 horsepower. One specimen was reported to have towed（拖）a whaling vessel for seven hours at the _______________ (54)of eight knot（节）.An angry whale will________________(55).A famous example of this was the fate of Whaler Essex, ________________(56)was sunk off the coast of South America early in the last century. More recently,steel ships have ___________( 57 ) their plates buckled（使弯曲）in the same way. Sperm whales（抹香鲸）were known to seize the old-time whaleboats in their jaws and crush them.The greatest________________(58)of whales is their diving ability.The sperm whale dives to the bottom foi his________________(59)food,the octopus（章鱼）.In that search he is known to go as far down as 3 , 200 feet, where the________________(60)is 1,400 pounds,to a square inch.Doing so he will________________(61)underwa-ter as long as one hour. Two special skills are involved in this storing up enough________________(62)(allwhales are air-breathed)and tolerating the great change in pressure.Just how he does it scientists have nol_______________ (63).It is believed that some of the oxygen is stored in a special________________(64)of blood vessels,rather than just held in the lungs.And it is believed that a special kind of oil in his head is some sort of a compensating mechanism that________________(65)adjusts the internal pressure of his body.But since you can't bring a live whale into the laboratory for study,no one knows just how these things work._________(51)A:aspectsB:signsC:waysD:reasons
共用题干Adaptation of Living ThingsCertain animals and plants develop characteristics that help them cope with their environment better than others of their kind.This natural biological process is called adaptation.Among the superior characteristics developed through adaptationare those that may help in getting food or shelter,in providing protection,and in producing and protecting the young.That results in the evolution of more and more organisms（微生物）that are better fitted to their environments.Each living thing is adapted to its way of life in a general way,but each is adapted especially to its own distinct class.A plant,for example,depends upon its roots to fix itself firmly and to absorb water and inorganic（无机的）chemicals.It depends upon its green leaves for using the sun's energy to make food from inorganic chemicals.These are general adaptations,common to most plants.In addition,there are special adaptations that only certain kinds of plants have.Many animals have adaptations that help them escape from their enemies.Some insects are hidden by their body color or shape,and many look like a leaf or a little branch.The coats of deer are colored to mix with the surroundings.Many animals have the ability to remain completely still when an enemy is near.Organisms have a great variety of ways of adapting.They may adapt.in their structure,function,and genetics;in their development and production of the young;and in other respects.An organism may create its own environment,as do warm-blooded mammals（哺乳动物）,which have the ability to adjust body heat exactly to maintain their ideal temperature despite changing weather.Usually adaptations are an advantage,but sometimes an organism is so well adapted to a particular environment that,if conditions change,it finds it difficult or impossible to readapt to the new conditions.The author cites the behavior of warm-blooded mammals in order to illustrate that______.A:a living thing may have the ability to create an environment of its ownB:a living creature may have the ability to remain still when an enemy is nearC:a living creature may have the ability to make food from its inorganic chemicalsD:a living creature may have the ability to change the color of its skin
共用题干The Greatest Mystery of WhalesThe whale is a warm-blooded,air-breathing animal,giving birth to its young alive,sucking them-and, like all mammals,originated on land.There are many______(51)of this.Its front flippers（鳍状肢）, used for steering and stability,are traces of feet.Immense strength is______(52)into the great body of the big whales,and in fact most of a whale's body is one gigantic muscle.The blue whale's pulling strength has been estimated______(53) 400 horsepower.One specimen was reported to have towed（拖）a whaling vessel for seven hours at the ______(54)of eight knot（节）.An angry whale will______(55).A famous example of this was the fate of Whaler Essex, ______(56)was sunk off the coast of South America early in the last century.More recently,steel ships have______( 57 ) their plates buckled（使弯曲）in the same way.Sperm whales（抹香鲸）were known to seize the old-time whaleboats in their jaws and crush them.The greatest______(58)of whales is their diving ability.The sperm whale dives to the bottom for his______( 59 ) food , the octopus（章鱼）.In that search he is known to go as far down as 3 , 200 feet, where the______(60)is 1,400 pounds to a square inch.Doing so he will______(61) underwater as long as one hour.Two special skills are involved in this storing up enough______(62) (all whales are air-breathed)and tolerating thern great change in pressure.Just how he does it scientists have not______(63).It is believed that some of the oxygen is stored in a special ______(64)of blood vessels,rather than just held in the lungs.And it is believed that a special kind of oi1 in his head is some sort of a compensating mechanism that______(65)adjusts the internal pressure of his body.But since you can't bring a live whale into the laboratory for study,no one knows just how these things work.51._________A:aspects B:signs C:ways D:reasons
共用题干The Greatest Mystery of WhalesThe whale is a warm-blooded,air-breathing animal,giving birth to its young alive,sucking them-and, like all mammals,originated on land.There are many______(51)of this.Its front flippers（鳍状肢）, used for steering and stability,are traces of feet.Immense strength is______(52)into the great body of the big whales,and in fact most of a whale's body is one gigantic muscle.The blue whale's pulling strength has been estimated______(53) 400 horsepower.One specimen was reported to have towed（拖）a whaling vessel for seven hours at the ______(54)of eight knot（节）.An angry whale will______(55).A famous example of this was the fate of Whaler Essex, ______(56)was sunk off the coast of South America early in the last century.More recently,steel ships have______( 57 ) their plates buckled（使弯曲）in the same way.Sperm whales（抹香鲸）were known to seize the old-time whaleboats in their jaws and crush them.The greatest______(58)of whales is their diving ability.The sperm whale dives to the bottom for his______( 59 ) food , the octopus（章鱼）.In that search he is known to go as far down as 3 , 200 feet, where the______(60)is 1,400 pounds to a square inch.Doing so he will______(61) underwater as long as one hour.Two special skills are involved in this storing up enough______(62) (all whales are air-breathed)and tolerating thern great change in pressure.Just how he does it scientists have not______(63).It is believed that some of the oxygen is stored in a special ______(64)of blood vessels,rather than just held in the lungs.And it is believed that a special kind of oi1 in his head is some sort of a compensating mechanism that______(65)adjusts the internal pressure of his body.But since you can't bring a live whale into the laboratory for study,no one knows just how these things work.58._________A:interest B:job C:danger D:mystery
From birth,nightjar chicks solicit food by walking to the front of an adult bird,reaching up,and（ ）.A.they peck at its billB.peck at its billC.pecking at its billD.at its bill they peck
共用题干Adaptation of Living ThingsCertain animals and plants develop characteristics that help them cope with their environment better than others of their kind.This natural biological process is called adaptation.Among the superior characteristics developed through adaptation are those that may help in getting food or shelter,in providing protection,and in producing and protecting the young. That results in the evolution of more and more organisms（生物体）that are better fitted to their environments.Each living thing is adapted to its way of life in a general way,but each is adapted especially to its own distinct class.A plant,for example,depends upon its roots to fix itself firmly and toabsorb water and inorganic chemicals（无机物）.It depends upon its green leaves for using the sun's energy to make food from inorganic chemicals.These are general adaptations,common to most plants .In addition,there are special adaptations that only certain kinds of plants have.Many animals have adaptations that help them escape from their enemies.Some are hidden by their body color or shape,and many look like a leaf or a little branch.The coats of deer are colored to mix with the surroundings .Many animals .have the ability to remain completely still when an enemy is near.Organisms have a great variety of ways of adapting.They may adapt in their structure,func-tion,and genetics;in their development and production of the young;and in other respects.An organism may create its own environment, as do warm-blooded mammals（哺乳动物）,which have the ability to adjust body heat exactly to maintain their ideal temperature despite changing weather.Usually adaptations are an advantage,but sometimes an organism is so well adapted to a particular environment that if conditions change,it finds it difficult or impossible to readapt to the new conditions. Which of the following is NOT directly mentioned in the passage?A: A living thing may adapt in its structure.B: An organism may adapt in its function.C: A living creature may adapt in its genetic makeup.D: A living organism may adapt in its sleeping habit.
共用题干Adaptation of Living ThingsCertain animals and plants develop characteristics that help them cope with their environment better than others of their kind.This natural biological process is called adaptation.Among the superior characteristics developed through adaptation are those that may help in getting food or shelter,in providing protection,and in producing and protecting the young. That results in the evolution of more and more organisms（生物体）that are better fitted to their environments.Each living thing is adapted to its way of life in a general way,but each is adapted especially to its own distinct class.A plant,for example,depends upon its roots to fix itself firmly and toabsorb water and inorganic chemicals（无机物）.It depends upon its green leaves for using the sun's energy to make food from inorganic chemicals.These are general adaptations,common to most plants .In addition,there are special adaptations that only certain kinds of plants have.Many animals have adaptations that help them escape from their enemies.Some are hidden by their body color or shape,and many look like a leaf or a little branch.The coats of deer are colored to mix with the surroundings .Many animals .have the ability to remain completely still when an enemy is near.Organisms have a great variety of ways of adapting.They may adapt in their structure,func-tion,and genetics;in their development and production of the young;and in other respects.An organism may create its own environment, as do warm-blooded mammals（哺乳动物）,which have the ability to adjust body heat exactly to maintain their ideal temperature despite changing weather.Usually adaptations are an advantage,but sometimes an organism is so well adapted to a particular environment that if conditions change,it finds it difficult or impossible to readapt to the new conditions. It can be inferred from this passage that the feathers of a bird are colored_______.A: to frightened its enemiesB: to attract its enemiesC:to adjust its body heatD:to match its environment
共用题干Adaptation of Living ThingsCertain animals and plants develop characteristics that help them cope with their environment better than others of their kind.This natural biological process is called adaptation.Among the superior characteristics developed through adaptation are those that may help in getting food or shelter,in providing protection,and in producing and protecting the young. That results in the evolution of more and more organisms（生物体）that are better fitted to their environments.Each living thing is adapted to its way of life in a general way,but each is adapted especially to its own distinct class.A plant,for example,depends upon its roots to fix itself firmly and toabsorb water and inorganic chemicals（无机物）.It depends upon its green leaves for using the sun's energy to make food from inorganic chemicals.These are general adaptations,common to most plants .In addition,there are special adaptations that only certain kinds of plants have.Many animals have adaptations that help them escape from their enemies.Some are hidden by their body color or shape,and many look like a leaf or a little branch.The coats of deer are colored to mix with the surroundings .Many animals .have the ability to remain completely still when an enemy is near.Organisms have a great variety of ways of adapting.They may adapt in their structure,func-tion,and genetics;in their development and production of the young;and in other respects.An organism may create its own environment, as do warm-blooded mammals（哺乳动物）,which have the ability to adjust body heat exactly to maintain their ideal temperature despite changing weather.Usually adaptations are an advantage,but sometimes an organism is so well adapted to a particular environment that if conditions change,it finds it difficult or impossible to readapt to the new conditions. The author cites the behavior of warm-blooded mammals in order to illustrate that a living thing may have the ability_______.A:to create an environment of its ownB:to remain still when an enemy is near.C:to make food from its inorganic chemicalsD:to change the color of its skin.
共用题干The Greatest Mystery of WhalesThe whale is a warm-blooded,air-breathing animal,giving birth to its young alive,sucking them-and, like all mammals,originated on land.There are many______(51)of this.Its front flippers（鳍状肢）, used for steering and stability,are traces of feet.Immense strength is______(52)into the great body of the big whales,and in fact most of a wha'e'sbo衡is one gigantic muscle.The blue whale's pulling strength has been estimated______(53) 400 horsepower.One specimen was reported to have towed（拖）a whaling vessel for seven hours at the______ (54)of eight knot（节）.An angry whale will______(55).A famous example of this was the fate of Whaler Essex,______(56)was sunk off the coast of South America early in the last century.More recently,steel shipshave ___________( 57 ) their plates buckled（使弯曲）in the same way.Sperm whales（抹香鲸）were known to seize the old-time whaleboats in their jaws and crush them.The greatest______(58)of whales is their diving ability.The sperm whale dives to the bottom for his ______(59)food,the octopus（章鱼）.In that search he is known to go as far down as 3,200 feet,where the ______(60)is 1 ,400 pounds to a square inch.Doing so he will______(61)underwater as long as one hour.Two special1 skills are involved in this storing up enough______(62)(all whales are air-breathed ) and tolerating the great change in pressure.Just how he does it scientists have not______(63).It is believed that some of the oxygen is stored in a special______(64)of blood vessels,rather than just held in the lungs.And it is believed that a special kind of oil in his head is some sort of a compensating mechanism that ______(65)adjusts the internal pressure of his body.But since you can't bring a live whale into the laboratory for study,no one knows just how these things work.65._________A:mentally B:artificially C:manually D:automatically
共用题干The Greatest Mystery Of WhalesThe whale is a warm-blooded,air-breathing animal,giving birth to its young alive, sucking them一and,like all mammals,originated on land.There are many_________(1)of this. Its front flippers（鳍状肢）,used for steering and stability,are traces of feet.Immense strength is_________(2)into the great body of the big whales,and in fact most of a whale's body is one gigantic muscle.The blue whale's pulling strength has been estimated_________(3)400 horsepower. One specimen was reported to have towed（拖）a whaling vessel for seven hours at the_________(4)of eight knots （节）.An angry whale will_________(5)a ship.A famous example of this was the fate of whaler Essex,_________(6)was sunk off the coast of South America early in the last century. More recently,steel ships have_________(7) their plates buckled（使弯曲）in the same way. Sperm whales（抹香鲸）were known to seize the old-time whaleboats in their jaws and crush them.The greatest_________(8)of whales is their diving ability.The sperm whale dives to the bottom for his_________(9) food, the octopus（章鱼）.In that search he is known to go as far down as 3, 200 feet,where the_________(10)is 1,400 pounds,toa square inch.Doing so he will_________(11)underwater long as one hour. Twospecial skills are involved in this:storing up enough_________(12)(all whales are air-breathed)and tolerating the great change in pressure.Just how he does it scientists have not_________(13).It is believed that some of the oxygen is stored in a special _________(14)of blood vessels,rather than just held in the lungs.And it is believed that a special kind of oil in his head is some sort of compensating mechanism that _________(15)adjusts the internal pressure of his body.But since you can't bring a live whale into the laboratory for study,no one knows just how these things work._________(7)A:had B:operated C:seen D:caught
共用题干The Greatest Mystery Of WhalesThe whale is a warm-blooded,air-breathing animal,giving birth to its young alive, sucking them一and,like all mammals,originated on land.There are many_________(1)of this. Its front flippers（鳍状肢）,used for steering and stability,are traces of feet.Immense strength is_________(2)into the great body of the big whales,and in fact most of a whale's body is one gigantic muscle.The blue whale's pulling strength has been estimated_________(3)400 horsepower. One specimen was reported to have towed（拖）a whaling vessel for seven hours at the_________(4)of eight knots （节）.An angry whale will_________(5)a ship.A famous example of this was the fate of whaler Essex,_________(6)was sunk off the coast of South America early in the last century. More recently,steel ships have_________(7) their plates buckled（使弯曲）in the same way. Sperm whales（抹香鲸）were known to seize the old-time whaleboats in their jaws and crush them.The greatest_________(8)of whales is their diving ability.The sperm whale dives to the bottom for his_________(9) food, the octopus（章鱼）.In that search he is known to go as far down as 3, 200 feet,where the_________(10)is 1,400 pounds,toa square inch.Doing so he will_________(11)underwater long as one hour. Twospecial skills are involved in this:storing up enough_________(12)(all whales are air-breathed)and tolerating the great change in pressure.Just how he does it scientists have not_________(13).It is believed that some of the oxygen is stored in a special _________(14)of blood vessels,rather than just held in the lungs.And it is believed that a special kind of oil in his head is some sort of compensating mechanism that _________(15)adjusts the internal pressure of his body.But since you can't bring a live whale into the laboratory for study,no one knows just how these things work._________(8)A:interest B:job C:danger D:mystery
共用题干The Greatest Mystery of WhalesThe whale is a warm-blooded,air-breathing animal,giving birth to its young alive,sucking them-and, like all mammals,originated on land.There are many______(51)of this.Its front flippers（鳍状肢）, used for steering and stability,are traces of feet.Immense strength is______(52)into the great body of the big whales,and in fact most of a wha'e'sbo衡is one gigantic muscle.The blue whale's pulling strength has been estimated______(53) 400 horsepower.One specimen was reported to have towed（拖）a whaling vessel for seven hours at the______ (54)of eight knot（节）.An angry whale will______(55).A famous example of this was the fate of Whaler Essex,______(56)was sunk off the coast of South America early in the last century.More recently,steel shipshave ___________( 57 ) their plates buckled（使弯曲）in the same way.Sperm whales（抹香鲸）were known to seize the old-time whaleboats in their jaws and crush them.The greatest______(58)of whales is their diving ability.The sperm whale dives to the bottom for his ______(59)food,the octopus（章鱼）.In that search he is known to go as far down as 3,200 feet,where the ______(60)is 1 ,400 pounds to a square inch.Doing so he will______(61)underwater as long as one hour.Two special1 skills are involved in this storing up enough______(62)(all whales are air-breathed ) and tolerating the great change in pressure.Just how he does it scientists have not______(63).It is believed that some of the oxygen is stored in a special______(64)of blood vessels,rather than just held in the lungs.And it is believed that a special kind of oil in his head is some sort of a compensating mechanism that ______(65)adjusts the internal pressure of his body.But since you can't bring a live whale into the laboratory for study,no one knows just how these things work.51._________A:aspects B:signsC:waysD:reasons
共用题干The Greatest Mystery of WhalesThe whale is a warm-blooded,air-breathing animal,giving birth to its young alive,sucking them-and, like all mammals,originated on land.There are many______(51)of this.Its front flippers（鳍状肢）, used for steering and stability,are traces of feet.Immense strength is______(52)into the great body of the big whales,and in fact most of a wha'e'sbo衡is one gigantic muscle.The blue whale's pulling strength has been estimated______(53) 400 horsepower.One specimen was reported to have towed（拖）a whaling vessel for seven hours at the______ (54)of eight knot（节）.An angry whale will______(55).A famous example of this was the fate of Whaler Essex,______(56)was sunk off the coast of South America early in the last century.More recently,steel shipshave ___________( 57 ) their plates buckled（使弯曲）in the same way.Sperm whales（抹香鲸）were known to seize the old-time whaleboats in their jaws and crush them.The greatest______(58)of whales is their diving ability.The sperm whale dives to the bottom for his ______(59)food,the octopus（章鱼）.In that search he is known to go as far down as 3,200 feet,where the ______(60)is 1 ,400 pounds to a square inch.Doing so he will______(61)underwater as long as one hour.Two special1 skills are involved in this storing up enough______(62)(all whales are air-breathed ) and tolerating the great change in pressure.Just how he does it scientists have not______(63).It is believed that some of the oxygen is stored in a special______(64)of blood vessels,rather than just held in the lungs.And it is believed that a special kind of oil in his head is some sort of a compensating mechanism that ______(65)adjusts the internal pressure of his body.But since you can't bring a live whale into the laboratory for study,no one knows just how these things work.58._________A:interest B:jobC:danger D:mystery
共用题干The Greatest Mystery of Wha1egThe whale is a warm一blooded,air-breathing animal,giving birth to its young alive,sucking them一and, like all mammals,originated on land. There are many__________(51)of this. Its front flippers (鳍状肢）, used for steering and stability,are traces of feet.Immense strength is________(52)into the great body of the big whales,and in fact most of a whale',body is one gigantic muscle.The blue whale'S pulling strength has been estimated________.(53) 400 horsepower. One specimen was reported to have towed（拖）。whaling vessel for seven hours at the _______(54)of eight knot（节）.An angry whale will________(55).A famous example of this was the fate of Whaler Essex, ________(56)was sunk off the coast of South America early in the last century.More recently,steel ships have_(57)their plates buckled（使弯曲）in the same way. Sperm whales（抹香鲸）were known to seize the old-time whaleboats in their jaws and crush them.The greatest________(58)of whales is their diving ability.The sperm whale dives to the bottom for his________(59)food,the octopus（章鱼）,In that search he is known to go as far down as 3 , 200 feet,where the________(60)is 1,400 pounds,to a square inch.Doing so he will________(61)underwa- ter as long as one hour. Two special skills are involved in this storing up enough________(62)(all whales are air-breathed)and tolerating the great change in pressure.Just how he does it scientists have not _________(63).It is believed that some of the oxygen is stored in a special________(64)of blood vessels,rather than just held in the lungs.And it is believed that a special kind of oil in his head is some sort of a compensating mechanism that_________(65)adjusts the internal pressure of his body.But since you can't bring a live whale into the laboratory for study,no one knows just how these things work._________(55)A:abandonB:attackC:leaveD:board
共用题干The Greatest Mystery of Wha1egThe whale is a warm一blooded,air-breathing animal,giving birth to its young alive,sucking them一and, like all mammals,originated on land. There are many__________(51)of this. Its front flippers (鳍状肢）, used for steering and stability,are traces of feet.Immense strength is________(52)into the great body of the big whales,and in fact most of a whale',body is one gigantic muscle.The blue whale'S pulling strength has been estimated________.(53) 400 horsepower. One specimen was reported to have towed（拖）。whaling vessel for seven hours at the _______(54)of eight knot（节）.An angry whale will________(55).A famous example of this was the fate of Whaler Essex, ________(56)was sunk off the coast of South America early in the last century.More recently,steel ships have_(57)their plates buckled（使弯曲）in the same way. Sperm whales（抹香鲸）were known to seize the old-time whaleboats in their jaws and crush them.The greatest________(58)of whales is their diving ability.The sperm whale dives to the bottom for his________(59)food,the octopus（章鱼）,In that search he is known to go as far down as 3 , 200 feet,where the________(60)is 1,400 pounds,to a square inch.Doing so he will________(61)underwa- ter as long as one hour. Two special skills are involved in this storing up enough________(62)(all whales are air-breathed)and tolerating the great change in pressure.Just how he does it scientists have not _________(63).It is believed that some of the oxygen is stored in a special________(64)of blood vessels,rather than just held in the lungs.And it is believed that a special kind of oil in his head is some sort of a compensating mechanism that_________(65)adjusts the internal pressure of his body.But since you can't bring a live whale into the laboratory for study,no one knows just how these things work._________(58)A:interestB:jobC:dangerD:mystery
共用题干The Greatest Mystery of Wha1egThe whale is a warm一blooded,air-breathing animal,giving birth to its young alive,sucking them一and, like all mammals,originated on land. There are many__________(51)of this. Its front flippers (鳍状肢）, used for steering and stability,are traces of feet.Immense strength is________(52)into the great body of the big whales,and in fact most of a whale',body is one gigantic muscle.The blue whale'S pulling strength has been estimated________.(53) 400 horsepower. One specimen was reported to have towed（拖）。whaling vessel for seven hours at the _______(54)of eight knot（节）.An angry whale will________(55).A famous example of this was the fate of Whaler Essex, ________(56)was sunk off the coast of South America early in the last century.More recently,steel ships have_(57)their plates buckled（使弯曲）in the same way. Sperm whales（抹香鲸）were known to seize the old-time whaleboats in their jaws and crush them.The greatest________(58)of whales is their diving ability.The sperm whale dives to the bottom for his________(59)food,the octopus（章鱼）,In that search he is known to go as far down as 3 , 200 feet,where the________(60)is 1,400 pounds,to a square inch.Doing so he will________(61)underwa- ter as long as one hour. Two special skills are involved in this storing up enough________(62)(all whales are air-breathed)and tolerating the great change in pressure.Just how he does it scientists have not _________(63).It is believed that some of the oxygen is stored in a special________(64)of blood vessels,rather than just held in the lungs.And it is believed that a special kind of oil in his head is some sort of a compensating mechanism that_________(65)adjusts the internal pressure of his body.But since you can't bring a live whale into the laboratory for study,no one knows just how these things work._________(51)A:aspectsB: signsC: waysD: reasons
共用题干The First BicycleThe history of the bicycle goes back more than 200 years.In 1791,Count de Sivrac ______(51)onlookers in a park in Paris as he showed______(52)his two-wheeled inven-tion,a machine called the celeriferé.It was basically an______(53)version of a children's toy which had been in use for many years.Sivrac's“celeriferé”had a wooden frame,made in the ______(54)of a horse,which was mounted on a wheel at either end.To ride it,you sat on a small seat,just like a modern bicycle,and pushed______(55)against the______(56)with your legs-there were no pedals.It was impossible to steer a celeriferé and it had no brakes,but despite these problems the invention very much______(57)to the fashionable young men of Paris.Soon they were______(58)races up and down the streets.Minor______(59)werecommonasridersattemptedafinalburstof_____(60).Controlling the machine was difficult,as the only way to change______(61)was to pull up the front of the “celeriferé”and_____(62)it round while the front wheel was spinning in the air. “Celeriferés”were not popular for long,______(63),as the______(64)of no springs,no steering and rough roads made riding them very uncomfortable.Even so,the wooden celeriferé was the______(65)of the modern bicycle.51._________A: delightedB: cheeredC: appreciatedD: overjoyed
According to the passage，the Japanese government could do a better job in( ) A.encouraging higher birth rate B.taking care of the elderly C.giving young people more power D.funding its deficit
Which of these best identifies the types of prefixes a router running BGP will advertise to an EBGP peer？ （）A、 prefixes received from any other BGP peer and prefixes locally originated via networkstatements or redistributed to BGPB、 all prefixes in its IP routing tableC、 only prefixes received from EBGP peers and prefixes locally originated via network statements or redistributedD、 only prefixes received from EBGP peers and prefixes received from route reflectorsE、 all prefixes in its routing table except the prefixes received from other EBGP peersF、 all prefixes in its routing table except the prefixes received from other IBGP peers
Which of these best identifies the types of prefixes a router running BGP will advertise to an EBGP peer？（）A、prefixes received from any other BGP peer and prefixes locally originated via network statements or redistributed to BGPB、all prefixes in its IP routing tableC、only prefixes received from EBGP peers and prefixes locally originated via network statements or redistributedD、only prefixes received from EBGP peers and prefixes received from route reflectorsE、all prefixes in its routing table except the prefixes received from other EBGP peersF、all prefixes in its routing table except the prefixes received from other IBGP peers