Sulphur has occasionally been found in the earth in an almost pure state.A:regularly B:accidentallyC:sometimes D:successfully
Sulphur has occasionally been found in the earth in an almost pure state.
A:regularly
B:accidentally
C:sometimes
D:successfully
B:accidentally
C:sometimes
D:successfully
参考解析
解析：本句话的意思：“地球上偶然发现了几乎纯态的硫。,, occasionally与sometimes意思相近，意为“有时，偶尔”，如：I drink coffee only occasionally.我只是偶尔才喝咖啡。 regularly意为“定期地，有规律地”，如：The doctor told him to check his blood pressure regularly.大夫要他定期地查血压。accidentally意为“意外地，偶然地”，如：I accidentally found the book I had been looking for．我偶然发现了我一直想要的书。successfully意为“成功地”，如：We have completed the experiment successfully.我们成功地做完了实验。
相关考题：
() a thorough investigation, no trace of her husband has been found. A、AlthoughB、ThoughC、DespiteD、Even
(b) Explain the meaning of the term ‘Efficient Market Hypothesis’ and discuss the implications for a company ifthe stock market on which it is listed has been found to be semi-strong form. efficient. (9 marks)
Everything on the earth _____ all the time.A. is changingB. is changedC. has changedD. has been changed
My niece has been to Japan and India as well as all of Europe. By the time she is twenty, she ____ almost everywhere. A、would have beenB、would beC、will have beenD、will be
It has been proven that on the Earth, the closer one stays to the Earth, the more slowly time would seem to go.() 此题为判断题(对，错)。
_____ a thorough investigation, no trace of Dr Southwell has been found. A.BesidesB.ExceptC.As forD.Despite
Not a __________ has been found so far that can help the police find the thief. A.sightB.clueC.factD.sign
While the secretary ____ his desk, he found the long lost report. A.had been cleaningB.is cleaningC.has been cleaningD.was cleaning
When William hurried home, he found that his mother ____already ____to hospital.A、has; been sentB、had; sentC、has; sentD、had; been sent
It has been found that a strong______helps overcome the effects of distraction.A．interruptionB．motivationC．evaluationD．destination
The certificate of pratique certifies that ______.A.the ship has no rats or mice on boardB.no quarantinable disease has been found on the vesselC.no person has died during the voyage the ship has just completedD.all the crew members have no health problem
共用题干Where Has the Salt Come from?Every now and then,we meet a fact about our earth that makes us feel strange and no answer for the fact has yet been found.Such a fact is the existence of salt in the oceans. How did it get there?We simply do not know how the salt got into the ocean!We do know,of course,that salt is water-soluble,and so passes into the oceans with rainwater.The salt of the earth's surface is constantly being dissolved（溶解）and is passing into the ocean.But we do not know whether this can explain the huge quantity of salt in oceans.If all the oceans were dried up,enough salt would be left to build a wall 180 miles high and a mile thick. Such a wall would reach once around the world at the Equator（赤道）!The common salt that we all use is produced from seawater or the water of salt lakes, from salt springs（源泉）and from deposits of rock salt. The concentration（浓度）of salt in seawater ranges from about three percent to three-and-one-half percent. The Dead Sea, which covers an area of about 340 square miles,contains about 11,600,000,000 tons of salt!On the average, a gallon（加仑）of seawater contains about a quarter of a pound of salt.The beds of rock salt that are found in various parts of the world were all originally formed by the evaporation（蒸发）of seawater millions of years ago. It is believed that the thick rock-salt deposits were formed after about nine-tenth of theY volume of seawater had been evaporated.Most commercial salt is obtained from rock salt.The usual method is to drill wells（井） down to the salt beds. Pure water is pumped down（抽进去）through a pipe. The water dissolves the salt and it is forced through another pipe up to the surface.The author is sure that the dissolved salt from the earth's surface is the only source of the huge quantity of salt found in oceans.A:Right B:Wrong C:Not mentioned
However,it has been found that even people insensitive to a certain smell at first can suddenly become sensitive to it when（ ）to it often enough.A.subjectedB.leftC.drawnD.exposed
如果知道表示软件等“和……兼容”的短语“be compatible with”，就可以很容易地解答问题。 A.has found B.has been found C.finds D.was finding
共用题干To Survive or to Vanish1.Over 3.6 billion years ago,the first creature was born in the world.Since then,the earth started its era with life.The history of life on earth has been a history of interaction between living things and their surroundings.To a large extent,the physical form and the habits of the earth's vegetation and its animal life have been molded by the environment. Considering the whole span of earthly time,the opposite effect,in which life actually modifies its surroundings,has been relatively slight. Only in the present century has one species一man acquired significant power to alter the nature of his world.2.During the past 25 years,this power has not only become increasingly great but it has changed in character. The most alarming of all man's assaults upon the environment is the contamination of air,earth,rivers,and sea with dangerous and even lethal materials. This pollution is for the most part irrecoverable.In this now universal contamination of the environment,chemicals are the sinister partners of radiation in changing the very nature of the world the very nature of its life. Chemicals sprayed on croplands or forests or gardens lie long in soil,entering into living organisms, passing from one to another in a chain of poisoning and death.Or they pass mysteriously by underground streams until they emerge and combine into new forms that kill vegetation,sicken cattle,and work unknown harm on those who drink from once pure wells."Man can hardly even recognize the devils of his own creation,"as a scientist has said.3.Hundreds of millions of years have passed before the globe produced the life that now inhabits the earth.Given time not in years but in millennia life adjusts,and a balance has been reached.But in the modern world there is no time.4.The quick steps of change follows the impetuous pace of man rather than the deliberate pace of nature.Radiation is now the unnatural creation of man's tampering with the atom.The chemicals are the synthetic creations of man's inventive mind,having no counterparts in nature.5.To survive these chemicals would require not merely the years of one man's life but the life of generations.And even this,were it by some miracle possible,would be futile,for the new chemicals come from our laboratories in an endless stream;almost five hundred annually find their way into actual use in the United States alone.Among them are many that are used in man's war against nature.Since the mid l940's over 200 basic chemicals have been created for use in killing insects,weeds,and other organisms described as"pests".6.It is not my contention that chemical insecticides must never he used.I do contend that we have put poisonous and biologically potent chemicals indiscriminately into the hands of persons largely or wholly ignorant of their potentials for harm. We have subjected enormous numbers of people to contact with these poisons,without their consent and often without their knowledge.I contend,furthermore,that we have allowed these chemicals to be used with little or no advance investigation of their effect on soil,water,wildlife,and man himself. Future generations are unlikely to forgive our lack of concern for the integrity of the natural world that supports all life.The effect of life modifying its surroundings has been_______.A:man's tampering with the atomB:enormous numbers of people to contact with these poisonsC:the integrity of the natural world that supports all lifeD:inventiveE:irrecoverableF:relatively slight
It may be pointed out that warfare（战争）as practiced by man has no parallel in nature,This is to say that within the more highly developed animal populations of this earth,there is not now.nor has there been similar destruction within a species（物种）itself.In fact,one has to go to the lowliest forms of animal life,such as certain kinds of ants,to find anything comparable to human warfare.It is a curious fact that mankind appears to give the killing of his own kind a good reason by imaging that it is a"law of nature".There are now a lot of wrong ideas about the laws of nature,of which this is one of the most incorrect and fateful（致命的）.Political beliefs have been based upon it with results that have come near to destroying human civilization.The theory that war is a biological necessity.that it is nature′s method of controlling population and believing in the survival（生存）of the strong and the elimination（灭亡）of the weak,is totally wrong and insupportable.Within the last century.when wars have been common all over the world,the human population of the earth has almost doubled.The author of this passage seems to be the"law of nature".A.againstB.in favor ofC.uncertain ofD.very much interested in
It may be pointed out that warfare（战争）as practiced by man has no parallel in nature,This is to say that within the more highly developed animal populations of this earth,there is not now.nor has there been similar destruction within a species（物种）itself.In fact,one has to go to the lowliest forms of animal life,such as certain kinds of ants,to find anything comparable to human warfare.It is a curious fact that mankind appears to give the killing of his own kind a good reason by imaging that it is a"law of nature".There are now a lot of wrong ideas about the laws of nature,of which this is one of the most incorrect and fateful（致命的）.Political beliefs have been based upon it with results that have come near to destroying human civilization.The theory that war is a biological necessity.that it is nature′s method of controlling population and believing in the survival（生存）of the strong and the elimination（灭亡）of the weak,is totally wrong and insupportable.Within the last century.when wars have been common all over the world,the human population of the earth has almost doubled.What does the"law of nature"mean?You can find the answer in the passage inA.the first sentenceB.the fourth sentenceC.the seventh sentenceD.the final sentence
It may be pointed out that warfare（战争）as practiced by man has no parallel in nature,This is to say that within the more highly developed animal populations of this earth,there is not now.nor has there been similar destruction within a species（物种）itself.In fact,one has to go to the lowliest forms of animal life,such as certain kinds of ants,to find anything comparable to human warfare.It is a curious fact that mankind appears to give the killing of his own kind a good reason by imaging that it is a"law of nature".There are now a lot of wrong ideas about the laws of nature,of which this is one of the most incorrect and fateful（致命的）.Political beliefs have been based upon it with results that have come near to destroying human civilization.The theory that war is a biological necessity.that it is nature′s method of controlling population and believing in the survival（生存）of the strong and the elimination（灭亡）of the weak,is totally wrong and insupportable.Within the last century.when wars have been common all over the world,the human population of the earth has almost doubled.According to Sentence 2,which of the following is true?A.The destruction is similar to the killing of each other within human beings.B.There is not the similar destruction now,but it occurred before.,'C.There is never a time when we may see the similar destruction.D.The destruction is now a thing of the past.
输澳大利亚植物产品熏蒸处理，可在附加声明中注明（）A、Plastic wrapping has not been used in this consignmentB、This consignment has been fumigated before application of plastic wrappingC、Plastic wrapping used in this consignment conforms to the AQIS wrapping and perforation standard as found in the AQIS Methyl Bromide FumigationStandardD、FUMIGATION COMPANY：企业名称
单选题Although flight MH370 has been missing for months, I do believe it ______ some day in the future.Awill findBwon’t findCwill be foundDwon’t be found
问答题练习14 Research has also been done into the way people’s behavior changes in a number of small, apparently unimportant ways when they lie. It has been found that if they are sitting down at the same time, they tend to move about in their chairs more than usual.
填空题It has been found that the adventurer “Swiftwater” Bill Gates had greatly influenced Jack London’s books.____
问答题Practice 11 (1) Research has also been done into the way people’s behavior changes in a number of small, apparently unimportant ways when they lie. (2) It has been found that if they are sitting down at the same time, they tend to move about in their chairs more than usual. To the trained observer they are saying “I wish I were somewhere else now.”
单选题China’s economic reform is aimed at separating enterprises from the government. It has been implemented for almost 20 years, but breakthroughs ______ .Ahave been made yetBhave yet to makeChave yet to be madeDto have yet made
单选题RESULT OF SEARCH NEGATIVE means（）.Athe search has found nothingBthe derelict has been foundCthe derelict has been locatedDthe derelict has been sighted
单选题The certificate of pratique certifies that （）.Athe ship has no rats or mice on boardBno quarantinable disease has been found on the vesselCno person has died during the voyage the ship has just completedDall the crew members have no health problem