单选题Permission is kindly （） about 1000 tons of clean sea water ballast，as and when required for trimming purposes．Arequested to pump outBrequested pumping outCrequesting to pump outDrequesting pumping out
单选题
Permission is kindly （） about 1000 tons of clean sea water ballast，as and when required for trimming purposes．
A
requested to pump out
B
requested pumping out
C
requesting to pump out
D
requesting pumping out
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BThe world is not only hungry，it is also thirsty for water． this may seem strange to you，since nearly 75% of the earth is covered with water． But about 97% of this water is sea water．Man can only drink and use the other 3% fresh water that comes from rivers，lakes，under-ground and other places． And we cannot even use all of that，because some of this fresh water has been made dirty．At the moment，this small amount(数量) of fresh water is still enough for us． However，our need for water is getting greater and greater． Only if we take steps to solve this problem now，we can get away from a serious world water shortage later on． The people of the world cannot have an enjoyable life without enough clean water．On one hand we should stop wasting this little water of ours，on the other hand we should find ways to reuse it，but this has not been done widely．Today，in most large cities，water is used only once and it then returns to the sea or runs into underground places．lf we can make it clean again，it can be used once more just as if it were fresh from a spring．But even if large cities reuse its water，we still would not have enough in the future． Where．could we turn to next for water? To the ocean! How can we do to make use of this great a-mount of sea water? We can take the salt from the water to make it fresh．So if we take all these steps，we'll be in no danger of drying up!( )26． Why does the writer say that the world is thirsty for water?A． The amount of fresh water is really very small．B． The people of the world waste too much water．C． The people of the world have to drink a lot of water every day．D． There are too many people in the world needing water．
29． The writer thinks that people in large cities should __________ ．A． stop the used water from getting into undergroundB． only use the water from the riversC． make their used water clean againD． use as much sea water as possible
The sea looks very pretty when the sun is shining on it. It can be very rough when there is a strong wind. The sea is very big. It covers three quarters of the globe! The sea is also very deep in some places. There is one spot near the Philippines , where the sea is about 11 kilometers deep. The highest mountain in the world is about 9 kilometers high. If that mountain was put in the sea at that place, there would still be 3 kilometers of water above it! What a deep place! In most parts of the sea, there are plenty of fishes and plants. Some live near the top of the sea. Others live deep down. There are millions of tiny living things that float in the sea. Many fish live by eating them. The sea can be very cold. When the diver goes downwards, the sea becomes colder and colder. When the diver goes deeper, the water exerts greater pressure.1、There is one spot near the Philippines, where the sea is as deep as ( ).A、13 kilometersB、 9 kilometersC、 2 kilometersD、 11 kilometers2、There are millions of tiny living things that float in the sea, and( ).A、they live by eating fishB、they live by eating plantsC、they are good food for many fishD、they live by eating worms3、Which of the following statements is true? ( )A、When the diver dives under the sea, he gets colder and colder.B、When the diver sinks to the bottom, he is to be colder and colder.C、When the diver sinks in the sea, he will be rather cold.D、When the diver dives downward, the sea gets colder and colder.4、From the information given, why has the diver to wear a diving suit? ( )A、Because the diver is likely to be attacked by fish.B、 Because the water at great depths is very cold.C、 Because the salt water seems unsuitable for diver.D、 Because the pressure of water at great depths is immense ( 巨大的 ).
If the jacket water temperature rises rapidly above normal in a diesel engine, you should firstA.place standby cooler in operationB.reduce engine loadC.check thermostatic valveD.clean sea water strainer
What is the most usual reason for the fresh water-sea water heat exchanger fouling in the sea side?A.lube oil sludge accumulating in itB.dirt and scale etc , formed on the surfacesC.deformation of the tubes and the shell or the platesD.lube oil leakage into sea-water side
Permission is kindly ______ about 1000 tons of clean sea water ballast，as and when required for trimming purposes．A.requested to pump outB.requested pumping outC.requesting to pump outD.requesting pumping out
Permission is requested to pump out about 200 tons of clean sea ballast water for ______ purposes．A.safe manningB.trimmingC.avoiding collisionD.preventing pollution
共用题干1.Certainly no creature in the sea is odder than the common sea cucumber. All living creatures,especially human beings,have their peculiarities,but everything about the little sea cucumber seems unusual.What else can be said about a bizarre animal that,among other eccentricities, eats mud,feeds almost continuously day and night but can live without eating for long periods,and can be poisonous but is considered supremely edible by gourmets?2.For some fifty million years,despite all its eccentricities,the sea cucumber has subsisted on its diet of mud.It is adaptable enough to live attached to rocks by its tube feet,under rocks in shallow water,or on the surface of mud flats.Common in cool water on both Atlantic and Pacific shores, it has the ability to suck up mud or sand and digest whatever nutrients are present.3.Sea cucumbers come in a variety of colors,ranging from black to reddish brown to sand color and nearly white.One form even has vivid purple tentacles.Usually the creatures are cucumber shaped一hence their name一and because they are typically rock inhabitants,this shape,combined with flexibility,enables them to squeeze into crevices where they are safe from predators and ocean currents.4.Although they have voracious appetites,eating day and night,sea cucumbers have the capacity to become quiescent and live at a low metabolic rate feeding sparingly or not at all for long periods,so that the marine organisms that provide their food have a chance to multiply.If it were not for this faculty,they would devour all the food available in a short time and would probably starve themselves out of existence.5.But the most spectacular thing about the sea cucumber is the way it defends itself. Its major enemies are fish and crabs,when attacked,it squirts all its internal organs into water. It also casts off attached structures such as tentacles.The sea cucumber will eviscerate and regenerate itself if it is attacked or even touched;it will do the same if the surrounding water temperature is too high or if the water becomes too polluted.Paragraph 4______A:How Sea Cucumbers Defend Themselves.B:Places Where Sea Cucumbers Live.C:Eccentricities of Sea Cucumbers.D:Favorite Food of Sea Cucumbers.E:Eating Habits of Sea Cucumbers.F:Color and Shape of Sea Cucumbers.
共用题干The SeaWhat do you know about the sea?We know that it looks very pretty when the sun is shining on it.We also know that it can be very rough when there is a strong wind.What other things do we know about it?The first thing to remember is that the sea is very big.When you look at the map of the world you will find there is more water than land.The sea covers three quarters of the world.The sea is also very deep in some places.It is not deep everywhere.Some parts of the sea are very shal-low.But in some places the depth of the sea is very great.There is one spot,near Japan,where the sea is nearly 11 kilometers deep!The highest mountain in the world is about 9 kilometers high.If that mountainwere put into the sea at that place,there would be 2 kilometers of water above it！What a deep place!If you have swum in the sea,you know that it is salty.You can taste the salt,Rivers,which fi0w into the sea.carry salt from the land into the sea.Some parts of the sea are saltier than other parts,There i、one sea,called the Dead Sea,which is very salty.It is so salty that swimmers cannot sink!Fish cannot live in theDead Sea!In most parts of the sea,there are plenty of fishes and plants.Some live near the top of the sca.Othurslive deep down.There are millions of tiny living things that float in the sea.These floating things are so smallthat it is hard to see them.Many fish live by eating them.The sea can be very cold.Divers,who go deep down in the sea,know this.On the top the water may bewarm.When the diver goes downwards,the sea becomnes colder and colder. Another thing happens.When the diver goes deeper,the water above presses down on him.It squeezes him.Then the diver has to wear clothesmade of metal.But he cannot go very deep.Some people who wanted to go very deep used a very strong diving ship!They went down to the deepest part of the sea in it.They went down to a depth of eleven kilometers!The sea is 6 kilometers in depth on average.A:RightB:WrongC:Not mentioned
共用题干The SeaWhat do you know about the sea?We know that it looks very pretty when the sun is shining on it.We also know that it can be very rough when there is a strong wind.What other things do we know about it?The first thing to remember is that the sea is very big.When you look at the map of the world you will find there is more water than land.The sea covers three quarters of the world.The sea is also very deep in some places.It is not deep everywhere.Some parts of the sea are very shal-low.But in some places the depth of the sea is very great.There is one spot,near Japan,where the sea is nearly 11 kilometers deep!The highest mountain in the world is about 9 kilometers high.If that mountainwere put into the sea at that place,there would be 2 kilometers of water above it！What a deep place!If you have swum in the sea,you know that it is salty.You can taste the salt,Rivers,which fi0w into the sea.carry salt from the land into the sea.Some parts of the sea are saltier than other parts,There i、one sea,called the Dead Sea,which is very salty.It is so salty that swimmers cannot sink!Fish cannot live in theDead Sea!In most parts of the sea,there are plenty of fishes and plants.Some live near the top of the sca.Othurslive deep down.There are millions of tiny living things that float in the sea.These floating things are so smallthat it is hard to see them.Many fish live by eating them.The sea can be very cold.Divers,who go deep down in the sea,know this.On the top the water may bewarm.When the diver goes downwards,the sea becomnes colder and colder. Another thing happens.When the diver goes deeper,the water above presses down on him.It squeezes him.Then the diver has to wear clothesmade of metal.But he cannot go very deep.Some people who wanted to go very deep used a very strong diving ship!They went down to the deepest part of the sea in it.They went down to a depth of eleven kilometers!The land takes up 25%of the world.A:RightB:WrongC:Not mentioned
共用题干The SeaWhat do you know about the sea?We know that it looks very pretty when the sun is shining on it.We also know that it can be very rough when there is a strong wind.What other things do we know about it?The first thing to remember is that the sea is very big.When you look at the map of the world you will find there is more water than land.The sea covers three quarters of the world.The sea is also very deep in some places.It is not deep everywhere.Some parts of the sea are very shal-low.But in some places the depth of the sea is very great.There is one spot,near Japan,where the sea is nearly 11 kilometers deep!The highest mountain in the world is about 9 kilometers high.If that mountainwere put into the sea at that place,there would be 2 kilometers of water above it！What a deep place!If you have swum in the sea,you know that it is salty.You can taste the salt,Rivers,which fi0w into the sea.carry salt from the land into the sea.Some parts of the sea are saltier than other parts,There i、one sea,called the Dead Sea,which is very salty.It is so salty that swimmers cannot sink!Fish cannot live in theDead Sea!In most parts of the sea,there are plenty of fishes and plants.Some live near the top of the sca.Othurslive deep down.There are millions of tiny living things that float in the sea.These floating things are so smallthat it is hard to see them.Many fish live by eating them.The sea can be very cold.Divers,who go deep down in the sea,know this.On the top the water may bewarm.When the diver goes downwards,the sea becomnes colder and colder. Another thing happens.When the diver goes deeper,the water above presses down on him.It squeezes him.Then the diver has to wear clothesmade of metal.But he cannot go very deep.Some people who wanted to go very deep used a very strong diving ship!They went down to the deepest part of the sea in it.They went down to a depth of eleven kilometers!The deeper a diver goes down in the sea,the greater water pressure he bears?A:RightB: WrongC:Not mentioned
After leaving the port, we used （）to clean the empty holds and decks.A、fresh waterB、sea waterC、both A and BD、ballast water
清扫艏艉甲板，准备出海。（）A、Repair fore and aft decks and prepare for sea.B、Clean up lower deck and prepare for sea.C、Clean up fore and aft decks and prepare for sea.D、Paint fore and aft decks and prepare for sea.
单选题The abbreviation "TDS" about the potable water probably means （）.Atotal dissolved solidsBtemperature of distillation of sea waterCtotal dissolved sodiumDtotal delivery system
问答题Many parts of the world are losing important natural resources, such as forests, animals, or clean water. Choose one resource that is disappearing and explain why it needs to be saved. Write a composition of about 400 words on the topic.
单选题Permission is kindly requested（）the ballast water.Apump outBto pump outCpumping outDbe pumped out
单选题The fresh water generator produces fresh water （）.Aby cooling sea waterBby heating sea waterCby evaporation of sea waterDby purifying sea water
单选题Permission is requested to pump out about 200 tons of clean sea ballast water for （） purposes．Asafe manningBtrimmingCavoiding collisionDpreventing pollution
单选题Which of the following is wrong about operation of oily water separator?（）Afilled with clean water before operationBkeep air cushion in oil collecting space during runningCcheck oil level during runningDclean inner separator with low pressure stream
单选题The designed （） is 20 tons per day, but the fresh water generator can only distil 15 tons at present.AdisplacementBweightCpowerDcapacity
单选题What should you apply to a fathometer reading to determine the depth of water?（）ASubtract the draft of the vesselBAdd the draft of the vesselCSubtract the sea water correctionDAdd the sea water correction
问答题Water is vital for our survival and for producing food. It takes about a thousand tons of water to produce one tone of grain that, fed to cows, produces only 18 pounds of meat. Today mankind is using about 160 billion tons more water each year than is being replenished by rain and fed back into water storages. If this water were carried in water trucks, it would require a 300, 000-mile-long convoy of trucks every day—a convoy length 37 times the diameter of the Earth. This is how much water we are using and not replenishing.
单选题In a diesel engine jacket water cooler, with seawater cooling the fresh water, the（）Asea water temperature must never be warmer than 40℃Bjacket water pressure should always be greater than the sea water pressureCjacket water temperature must always be less than 60℃Djacket water pressure must always be less than the sea water pressure
单选题The designed capacity is 25 tons a day, but the fresh water generator can only （） 22 tons at present.AconsumeBdistillCrunDoperate
单选题The master got permission to pump out 500 tons of clean sea water for （）.Athe purpose of trimmingBthe approval for ballastCthe purpose of voyageDthe approval for operation
单选题Every new crude oil tanker of 20000 tons deadweight and above and every new product carrier of 30000 tons deadweight and above shall be provided with（）.Asegregated ballast tanksBmoulded draught measurement systemCadditional ballast water systemDdedicated clean ballast tanks system