单选题The rivers flow through some of the world’s grimiest areas, picking up oil, lead and other toxic materials, as well as fertilizer residues and nuclear fallout from Chernobly.A worldly B poisonous C wholesome D void

题目
单选题
The rivers flow through some of the world’s grimiest areas, picking up oil, lead and other toxic materials, as well as fertilizer residues and nuclear fallout from Chernobly.
A

worldly

B

poisonous      

C

wholesome      

D

void


相似考题

3.EThe need to feed a growing population is putting much pressure on the world’s supply of water. With 97% of the world’s water too salty to be drunk or used in agriculture, the worldwide supply of water needs careful management, especially in agriculture. Although the idea of a water shortage(短缺)seems strange to someone fortunate enough to live in a high rainfull country, many of the world’s agricultural industries experience constant water shortages.Although dams can be built to store water for agricultural use in dry areas and dry seaons, the costs of water redistribution(重新分配)are very high. Notonly is there the cost of the engineering itself, but there is also an environmental cost to be considered. Where valleys(山谷)are flooded to create dams, houses are lost and wildlife homes destroyed. Besides, water many flow easily through pipes to fields,but it cannot be transported from one side of the world to the other. Each country must therefore rely on the management of its own water to supply its farming requirements.This is particularly troubling ro countries with agricultural industries in areas dependent on irrigation(灌溉). In Texas, farmers’ overuse of irrigation water be resulted in a 25% redcution of the water stores. In the Central Valley area of south eastern USA, a huge water engineering project provided water for farming in dry vallege, but much of the water use has been poorly managed.Saudi Arabia’s attempts to grow wheat in desert areas have been the pumping of huge quantities of irrigation water from underground reserves. Because there is no rainfall in these areas, such reserves can only decrease, and it is believed that fifty years of pumping will see them run dry.72. From the first two paragraphs we learnt that _______.A.much of the world’s water is available for useB.people in high rainfll countries feel luckyC.the costs of water redistribution should be consideredD.water can be easily carried through pipes across the world

更多“单选题The rivers flow through some of the world’s grimiest areas, picking up oil, lead and other toxic materials, as well as fertilizer residues and nuclear fallout from Chernobly.A worldly B poisonous C wholesome D void”相关问题
  • 第1题:

    Passage Five

    From the beginning rivers have played an important part in the life of man. Man of the earliest times used the rivers as a means of traveling. Today rivers still serve as a great waterway for the transport and people.

    In ancient times, man settled near rivers or on river banks and built up large empires.

    Water is the Nature's most precious gift to man. Man needs water to irrigate his crops, to cook and to wash. In nations all over the world rivers mean life and wealth. They feed and clothe the nations around them.

    Water is also a source of energy and power. Man constructs huge dams across the river to control the water for irrigation and get the energy needed to drive generators. The electrical power is then directed to homes, cities, factories and television stations.

    Man uses water each day. His main source of water comes from reservoirs, which in turn get their water from the rivers.

    Rivers also bring down soil and minerals from the mountains and deposit them on the plains building up rich river deltas for raising plants and crops. Fresh water life in rivers or in lakes fed by them provide man with food.

    In a small way rivers help to keep man in good health and provide for his amusements. Various forms of water sports keep man strong and healthy.

    Rivers have run on this earth long before man. Man's future ability to live is uncertain, but rivers will flow on forever.

    52. Rivers have been important to man______.

    A. since the last century

    B. for a very long time

    C. since a few hundred years ago

    D. since a few years ago


    正确答案:B
    52.答案为B  此题为细节题。从本文第十句可以知道河流从一开始就在人类生活中扮演着重要角色,所以河流对人类重要的时间应当选B(很久了)

  • 第2题:

    In an auxiliary diesel engine bypass type lubricating oil system, the main lube oil pump forces_______ .

    A.all of the oil used by the engine through a filter

    B.some of the oil used by the engine through a filter

    C.some of the oil used by the engine through a centrifuge

    D.all of the oil used by the engine through a centrifuge


    正确答案:C

  • 第3题:

    Before loading bulk grain, bilge wells must be covered to ______.

    A.add strength to the bilge well strainer

    B.permit rapid flow of water to the bilge wells

    C.prevent cargo sifting into the bilge wells

    D.prevent oil, water, or other liquid from reaching the cargo


    正确答案:C
    在装载散装谷物之前,(舱底)污水井必须被盖上以防止货物进入其中。

  • 第4题:

    共用题干
    If you made a list of all the jobs performed by the different kinds of energy,you would fill many pages.
    Nuclear energy is used in some areas of the United States.But there are dangers.Waste materials from nuclear______(51)would destroy life if they leaked______(52)the land.When nuclear energy is produced,a lot of______(53)is produced,too,50 a flow of lake or ocean water 15 used to cool the operations.Then the water______(54)to its source.If the returning water were too hot,it would destroy fish and other______(55).
    Cow manure is being used to produce a kind of______(56).The manure from farms is put into a machine to convert it to a liquid.Then the gas 15 formed______(57)a natural process.If the converter were not 50______(58)at the present time,it would be used in many places to provide______(59).
    Garbage has become an energy source.It______(60)to oil,steam,or electricity,or it is used on the land.
    But recent______(61)about power supplies has led to increased interest in the use of wind______(62)a source of electrical power.Windmills are clean and they______(63)no waste.And they use a______(64)resource.Some scientists consider that wind energy systems can fulfill a valuable______(65)in meeting the energy needs of industrialized nations and of the developing world.

    _________(61)
    A:consideration
    B:thought
    C:concern
    D:interest

    答案:C
    解析:
    station“站”;factory“工厂”;work“工厂”;firm“公司”。根据下文内容,这里应该是“核电站”,因此选A。
    into“进入……”;onto“在……表面”;on“在……上”;to“去……”。根据下文内容,这里应该是“从核电站里排放的废气物质如果遗漏在地面上”,因此选B。
    high temperature“高j" ;hot air“热气”;heat“热量”;warmth"温暖”。本句意思是:“产生核能的同时会产生大量热能”。因此选C。
    get“得到”;come“来”;fall“落下”;return“返回”,最符合题意。本句意思是:“水会随后流回”。因此选D。
    根据常识,海洋里有生命的不止是动物或者植物,而是所有有生命的生物。本句意思是:“如果流回的水太热就会杀死鱼类和其他海里的生命”。因此选C。
    gas“天然气”;liquid“液体”;solid“固体”; air“空气”。根据下文,本句意思是:“牛粪被用来生产一种天然气”。因此选A。
    by“被…." ;through“通过……方式”;with“与……一起”;from“从……”。本句意思是:“通过自然过程形成天然气”。若用by会有be formed by结构中“构成”的被动式的竣义,因此选B。
    expensive"昂贵的”;complicated“复杂的”;rare"稀少的”;troublesome"麻烦的”。本句意思是:“如果目前转换器不昂贵,就能被广泛用来提供能源”。因此选A。
    oil“油”;liquid“液体”;power“电力”;fuel“能源”。此处需要的内容是指能源总称,而不是具体的一类能源,因此选D。
    此处的意思是“被转换成……”,正确的形式是be converted to...。本句意思是:“它能被转变为油、蒸汽或电,在农村也有用途”。因此选D。
    consideration“考虑”;thought“想法”;concern“关心的事”;interest“兴趣”。根据上下文此处应指对能源的关注,因此选C。
    like“像……”;as“作为……”;for“为……”;from“从……”。根据本句意思,应选B。
    give“给”;deposit“存放”;make“制作”;leave“留下”。本句意思是:“没有遗留污染物”。因此选D。
    measureless“不可坝d量的”; limitless“无限的”; boundless“无边无际的”; endless“没完没了的”。此处的意思是:“风力发电有无限的能量来源”。因此选B。
    role“角色”; duty“职责”; service“服务”; function“功能”。本句意思是: “一些科学家认为风能在满足工业国家和发展中国家的能源需求方面扮演着很有价值的角色”。因此选A。

  • 第5题:

    共用题干
    If you made a list of all the jobs performed by the different kinds of energy,you would fill many pages.
    Nuclear energy is used in some areas of the United States.But there are dangers.Waste materials from nuclear______(51)would destroy life if they leaked______(52)the land.When nuclear energy is produced,a lot of______(53)is produced,too,50 a flow of lake or ocean water 15 used to cool the operations.Then the water______(54)to its source.If the returning water were too hot,it would destroy fish and other______(55).
    Cow manure is being used to produce a kind of______(56).The manure from farms is put into a machine to convert it to a liquid.Then the gas 15 formed______(57)a natural process.If the converter were not 50______(58)at the present time,it would be used in many places to provide______(59).
    Garbage has become an energy source.It______(60)to oil,steam,or electricity,or it is used on the land.
    But recent______(61)about power supplies has led to increased interest in the use of wind______(62)a source of electrical power.Windmills are clean and they______(63)no waste.And they use a______(64)resource.Some scientists consider that wind energy systems can fulfill a valuable______(65)in meeting the energy needs of industrialized nations and of the developing world.

    _________(57)
    A:by
    B:through
    C:with
    D:from

    答案:B
    解析:
    station“站”;factory“工厂”;work“工厂”;firm“公司”。根据下文内容,这里应该是“核电站”,因此选A。
    into“进入……”;onto“在……表面”;on“在……上”;to“去……”。根据下文内容,这里应该是“从核电站里排放的废气物质如果遗漏在地面上”,因此选B。
    high temperature“高j" ;hot air“热气”;heat“热量”;warmth"温暖”。本句意思是:“产生核能的同时会产生大量热能”。因此选C。
    get“得到”;come“来”;fall“落下”;return“返回”,最符合题意。本句意思是:“水会随后流回”。因此选D。
    根据常识,海洋里有生命的不止是动物或者植物,而是所有有生命的生物。本句意思是:“如果流回的水太热就会杀死鱼类和其他海里的生命”。因此选C。
    gas“天然气”;liquid“液体”;solid“固体”; air“空气”。根据下文,本句意思是:“牛粪被用来生产一种天然气”。因此选A。
    by“被…." ;through“通过……方式”;with“与……一起”;from“从……”。本句意思是:“通过自然过程形成天然气”。若用by会有be formed by结构中“构成”的被动式的竣义,因此选B。
    expensive"昂贵的”;complicated“复杂的”;rare"稀少的”;troublesome"麻烦的”。本句意思是:“如果目前转换器不昂贵,就能被广泛用来提供能源”。因此选A。
    oil“油”;liquid“液体”;power“电力”;fuel“能源”。此处需要的内容是指能源总称,而不是具体的一类能源,因此选D。
    此处的意思是“被转换成……”,正确的形式是be converted to...。本句意思是:“它能被转变为油、蒸汽或电,在农村也有用途”。因此选D。
    consideration“考虑”;thought“想法”;concern“关心的事”;interest“兴趣”。根据上下文此处应指对能源的关注,因此选C。
    like“像……”;as“作为……”;for“为……”;from“从……”。根据本句意思,应选B。
    give“给”;deposit“存放”;make“制作”;leave“留下”。本句意思是:“没有遗留污染物”。因此选D。
    measureless“不可坝d量的”; limitless“无限的”; boundless“无边无际的”; endless“没完没了的”。此处的意思是:“风力发电有无限的能量来源”。因此选B。
    role“角色”; duty“职责”; service“服务”; function“功能”。本句意思是: “一些科学家认为风能在满足工业国家和发展中国家的能源需求方面扮演着很有价值的角色”。因此选A。

  • 第6题:

    The supply chain activities encompass all associated with the flow and transaction of goods, the flow of information from the raw materials supplier to the end user, as well as the reverse flow of materials and in formation in the()

    • A、Distribution process
    • B、Supply chain
    • C、Enterprise
    • D、International community

    正确答案:B

  • 第7题:

    单选题
    Before loading bulk grain, bilge wells must be covered to().
    A

    add strength to the bilge well strainer

    B

    permit rapid flow of water to the bilge wells

    C

    prevent cargo sifting into the bilge wells

    D

    preven oil, water , or other liquid from reaching the cargo


    正确答案: C
    解析: 暂无解析

  • 第8题:

    单选题
    One of the reasons that causes oil flowed from sludge outlet of a self-cleaning purifier is ()
    A

    seal water supply be cut off

    B

    make-up water supply be cut off

    C

    oil outlet valve closed or not open sufficiently

    D

    the flow rate of oil is too much


    正确答案: A
    解析: 暂无解析

  • 第9题:

    单选题
    If two mooring lines are to be placed on the same bollard,which method is BEST?().
    A

    Place the eye from the forward line on the bollard and then place the eye from the second line directly over the first

    B

    It makes no difference how the lines are placed

    C

    Place the eye from either line on the bollard,and then bring the eye of the other line up through the eye of the first,and place it on the bollard

    D

    Place both eyes on the bollard,in any manner,but lead both lines to the same winch head on the vessel and secure them on the winch


    正确答案: D
    解析: 暂无解析

  • 第10题:

    单选题
    If an emergency pump control is used as the emergency shutdown on a tanker,it must().
    A

    stop the flow of oil at the main deck manifold

    B

    prevent the oil from leaving the shore facility

    C

    prevent the oil from siphoning through the pump

    D

    None of the above


    正确答案: A
    解析: 暂无解析

  • 第11题:

    单选题
    These acid residues must be prevented from entering the crankcase, otherwise the lube oil would be()
    A

    contaminated

    B

    emulsified

    C

    deteriorated

    D

    oxidated


    正确答案: A
    解析: 暂无解析

  • 第12题:

    单选题
    While some military planners claimed that it would be possible to win a war fought with nuclear weapons, many scientists argued that such a war could not truly be won, because the fallout from nuclear warfare would create a nuclear winter and it also would be rendering the earth uninhabitable.
    A

    it also would be rendering the earth uninhabitable

    B

    rendering the earth uninhabitable

    C

    might have uninhabitably rendered the earth

    D

    render the earth uninhabitable

    E

    would also have rendered the earth uninhabitable


    正确答案: B
    解析:
    插入的内容和“create a nuclear winter”构成平行结构,故D项是正确的。

  • 第13题:

    第二组

    Displacement pumps are those where the volume of the pump chamber is alternately increased to draw the liquid in from the suction pipe and then decreased to force the liquid out into the delivery pipe. Centrifugal pumps are those wherein an impeller rotating at high speed throws the liquid by centrifugal force from the center to the periphery of the impeller where the liquid is discharged through the delivery outlet.

    Gear pump consists of two or more meshing gears (spur, single or double helical teeth) enclosed m a close-fitted housing. These are used extensively for pumping fuel oil, lubricating oil and hydraulic oil. When gears are unmeshed on the inlet side, a pressure drop occurs that helps the atmospheric pressure acting on the surface of the oil in the reservoir to force it up the pipe to fill the void, the oil is then transferred around the periphery of the pump housing. As the gear teeth mesh again on the outlet side, they form. a seal that prevents oil from backing up to the inlet, the oil in the void is then be forced out into the discharge line.

    All vane pumps have a rotor driven within a ring (cam ring) by a drive shaft coupled to a prime mover. A cylindrical rotor with sliding vanes, generally in radial slots, rotates within the ring. The center of the rotor is offset from the center of the ring. In a simple vane pump, as the rotor turns, the vanes are forced outward against the inner surface of the cam ring by centrifugal force. This outward radial movement of the vanes and turning of the rotor causes the chamber between the vanes to increase as the vanes pass further away from the inlet port. This increase in volume results in a lowering of pressure until the atmospheric pressure is sufficient to force oil from the reservoir into the inlet chamber. Oil from the inlet is swept away by the vanes toward the outlet port through a decreasing series of chambers until it is forced through the outlet port. A vane pump of balanced design has an elliptical cam ring so that two pumping chambers are formed. This pump is in hydraulically balance, since the two intake and two outlet ports are diametrically opposed to each other. Therefore the side loads exerted on the rotor cancel out, thereby increasing bearing lift and permitting high operating pressure.

    According to the last sentence of paragraph 1, from where the liquid is discharged through the delivery outlet?

    A.from the eye of the impeller

    B.from passage of impeller

    C.from the periphery of the impeller

    D.from the impeller


    正确答案:C

  • 第14题:

    An uncontrolled flow of gas, oil, or other well fluids into the atmosphere is called a ______.

    A.flow

    B.breakout

    C.kick

    D.Blowout


    正确答案:D
    一股不可控制的气体,油,或其他流体进入到大气中叫做喷泻。

  • 第15题:

    请阅读短文,完成此题。
    When we analyze the salt salinity(盐溶度 ) of ocean waters, we find that it varies only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic salinity. One of these is the subtraction of water from the ocean by means of evaporation. In this manner, the salinity is increased, since the salt stays behind. If this is carried to the extreme, of course, white salt would be left behind; this, by the way, is how much of the table salt we use is actually obtained.
    The opposite of evaporation is precipitation, such as rain, by which water is added to the ocean. Here the ocean is being diluted so that the salinity is decreased. This may occur in areas of
    high rainfall or in coastal regions where rivers flow into the ocean. Thus salinity may be increased by the subtraction of water by-evaporation, or decreased by the addition of fresh water by precipitation.
    Normally, in hot regions where the sun is very strong, the ocean salinity is somewhat higher than it is in other parts of the world where there is not as much evaporation. Similarly, in coastal regions where rivers dilute the sea, salinity is somewhat lower than in other oceanic areas.
    A third process by which salinity may be altered is associated with the formation and melting of sea ice. When seawater is frozen, the dissolved materials are left behind. In this manner, seawater directly beneath freshly formed sea ice has a higher salinity than it did before the ice appeared. Of course, when this ice melts, it will tend to decrease the salinity of the surrounding water.
    In the Weddell Sea, the densest water in the ocean is formed as a result of this freezing process, which increases the salinity of cold water. This heavy water sinks and is found in the deeper portion of the oceans of the world.

    Which of the following is not the cause of the decrease in the oceanic salinity?
    查看材料

    A.Precipitation.
    B.Rain and snow.
    C.Formation of ice.
    D.Addition of water by rivers.

    答案:C
    解析:
    根据第二段“The opposite of evaporation is precipitation…So that the salinity is decreased”“in areas of high rainfall…‘in coastal regions where rivers flow into the ocean”可以排除A、B、D项,答案选C。

  • 第16题:

    共用题干
    If you made a list of all the jobs performed by the different kinds of energy,you would fill many pages.
    Nuclear energy is used in some areas of the United States.But there are dangers.Waste materials from nuclear______(51)would destroy life if they leaked______(52)the land.When nuclear energy is produced,a lot of______(53)is produced,too,50 a flow of lake or ocean water 15 used to cool the operations.Then the water______(54)to its source.If the returning water were too hot,it would destroy fish and other______(55).
    Cow manure is being used to produce a kind of______(56).The manure from farms is put into a machine to convert it to a liquid.Then the gas 15 formed______(57)a natural process.If the converter were not 50______(58)at the present time,it would be used in many places to provide______(59).
    Garbage has become an energy source.It______(60)to oil,steam,or electricity,or it is used on the land.
    But recent______(61)about power supplies has led to increased interest in the use of wind______(62)a source of electrical power.Windmills are clean and they______(63)no waste.And they use a______(64)resource.Some scientists consider that wind energy systems can fulfill a valuable______(65)in meeting the energy needs of industrialized nations and of the developing world.

    _________(53)
    A:high temperature
    B:hot air
    C:heat
    D:warmth

    答案:C
    解析:
    station“站”;factory“工厂”;work“工厂”;firm“公司”。根据下文内容,这里应该是“核电站”,因此选A。
    into“进入……”;onto“在……表面”;on“在……上”;to“去……”。根据下文内容,这里应该是“从核电站里排放的废气物质如果遗漏在地面上”,因此选B。
    high temperature“高j" ;hot air“热气”;heat“热量”;warmth"温暖”。本句意思是:“产生核能的同时会产生大量热能”。因此选C。
    get“得到”;come“来”;fall“落下”;return“返回”,最符合题意。本句意思是:“水会随后流回”。因此选D。
    根据常识,海洋里有生命的不止是动物或者植物,而是所有有生命的生物。本句意思是:“如果流回的水太热就会杀死鱼类和其他海里的生命”。因此选C。
    gas“天然气”;liquid“液体”;solid“固体”; air“空气”。根据下文,本句意思是:“牛粪被用来生产一种天然气”。因此选A。
    by“被…." ;through“通过……方式”;with“与……一起”;from“从……”。本句意思是:“通过自然过程形成天然气”。若用by会有be formed by结构中“构成”的被动式的竣义,因此选B。
    expensive"昂贵的”;complicated“复杂的”;rare"稀少的”;troublesome"麻烦的”。本句意思是:“如果目前转换器不昂贵,就能被广泛用来提供能源”。因此选A。
    oil“油”;liquid“液体”;power“电力”;fuel“能源”。此处需要的内容是指能源总称,而不是具体的一类能源,因此选D。
    此处的意思是“被转换成……”,正确的形式是be converted to...。本句意思是:“它能被转变为油、蒸汽或电,在农村也有用途”。因此选D。
    consideration“考虑”;thought“想法”;concern“关心的事”;interest“兴趣”。根据上下文此处应指对能源的关注,因此选C。
    like“像……”;as“作为……”;for“为……”;from“从……”。根据本句意思,应选B。
    give“给”;deposit“存放”;make“制作”;leave“留下”。本句意思是:“没有遗留污染物”。因此选D。
    measureless“不可坝d量的”; limitless“无限的”; boundless“无边无际的”; endless“没完没了的”。此处的意思是:“风力发电有无限的能量来源”。因此选B。
    role“角色”; duty“职责”; service“服务”; function“功能”。本句意思是: “一些科学家认为风能在满足工业国家和发展中国家的能源需求方面扮演着很有价值的角色”。因此选A。

  • 第17题:

    共用题干
    Water

    Earth is like a big blue marble.From high above the Earth and from the moon,the planet gleams and shines.The blue water in the oceans and seas of the Earth makes a dramatic image.The white clouds above the Earth add beauty to the picture.Water is the source of this beauty and the source of life on Earth.It is the reason people can live on this planet. Water is everywhere.(46)_______.It is in the soil,the ground that grows the food.Water is in rock deep under the ground, in natural holding areas一in storage.In a real sense,water keeps Earth alive.
    Nature has an unchanging amount of water. Nature has a perfect system for recycling water. (47)_____.It falls as rain.Then it goes to one of three places.It might sink slowly through the soil into the natural holding areas in the rock.(48)_______一by becoming vapor,or gas.It might run off into streams,rivers and oceans.By itself,nature can keep the balance and provide plenty of clean water for us.Nature recycles water.
    However,people cause problems for this natural recycling system.Nature's recycling system can work well(49)________.Some ways that people upset nature are easy to understand.For example, dirty sewage(污水沟系统)water from homes and factories must not mix with drinking water. People get sick from drinking contaminated water. Sometimes water from factories goes into streams and rivers.It enters into the groundwater. It can flow into lakes too.This kind of contamination from industry(waste water from factories) can be dangerous for people.If water contains poisons and chemicals,it is poison.(50)________;some poisons kill people as well as birds and animals.Without knowing,people can upset nature's recycling system.
    Lakes and rivers add beauty to the world. People enjoy water for entertainment purposes,too. People enjoy swimming and playing in the cool water of a lake in the summer. They like to ride on boats on rivers.Many people enjoy catching fish in the rivers.They fish for food and for sport.However,in some places,the water of the lakes and rivers is no longer safe.These rivers and lakes are contaminated.The fish are dying because of the chemicals from farms and factories.People cannot swim in the polluted water.

    _________(49)
    A:Poison makes people sick
    B:It is in the air that people breathe
    C:We can not live without water
    D:Water is used again and again
    E:only if people work with the system and not against it
    F: It might disappear into the air quickly

    答案:E
    解析:
    文章前一句说水到处都存在,那么后一句应该跟此句有关系,而且下一句说“它存在土壤里”,因此选项B项“它在人们呼吸的空气里”是最合适的。
    文章前一句说大自然有一个循环水的完美系统,那么后一句相关的选项只有D项“水可以一遍又一遍地反复利用”。
    从本句的前后句看这是一个排比句式,三句话都是以it might开头,而后半句“变成蒸汽或水汽”更证明选项F是最合适的。
    本句前一句讲人们会引起大自然循环体系的问题,那么空格里应该填入人们怎么做大自然的循环体系才能很好地运转。因此选项E“只有顺着这个系统,而不是对它造成破坏”是最佳选择。
    本句前后句的关键词是“poison",因此判断只有选项A“毒物使人生病” 最合适。

  • 第18题:

    单选题
    An uncontrolled flow of gas,oil,or other well fluids into the atmosphere is called a().
    A

    flow

    B

    breakout

    C

    kick

    D

    blowout


    正确答案: D
    解析: 暂无解析

  • 第19题:

    单选题
    The supply chain activities encompass all associated with the flow and transaction of goods, the flow of information from the raw materials supplier to the end user, as well as the reverse flow of materials and in formation in the()
    A

    Distribution process

    B

    Supply chain

    C

    Enterprise

    D

    International community


    正确答案: A
    解析: 暂无解析

  • 第20题:

    单选题
    To receive oil residues from the purification of fuel and lubricating oils in the machinery spaces, what kind of tank(s) should be provided on board?()
    A

    bilge tank

    B

    sludge tank

    C

    overflow tank

    D

    oil collecting tank


    正确答案: B
    解析: 暂无解析

  • 第21题:

    单选题
    If an emergency pump control is used as the emergency shutdown on a tank vessel,it must().
    A

    stop the flow of oil at the main deck manifold

    B

    prevent the oil from leaving the shore facility

    C

    prevent the oil from siphoning through the pump

    D

    None of the above


    正确答案: D
    解析: 暂无解析

  • 第22题:

    问答题
    Practice 2  Until recently, scientists knew little about life in the deep sea, nor had they reason to believe that it was being threatened. Now, with the benefit of technology that allows for deeper exploration, researchers have uncovered a remarkable array of species inhabiting the ocean floor at depths of more than 660 feet, or about 200 meters. At the same time, however, technology has also enabled fishermen to reach far deeper than ever before, into areas where bottom trawls can destroy in minutes what has taken nature hundreds and in some cases thousands of years to build.  Many of the world's coral species, for example, are found at depths of more than 200 meters. It is also estimated that roughly half of the world's highest seamounts - areas that rise from the ocean floor and are particularly rich in marine life - are also found in the deep ocean.  These deep sea ecosystems provide shelter, spawning and breeding areas for fish and other creatures, as well as protection from strong currents and predators. Moreover, they are believed to harbor some of the most extensive reservoirs of life on earth, with estimates ranging from 500,000 to 100 million species inhabiting these largely unexplored and highly fragile ecosystems.

    正确答案: 【参考译文】
    前不久,科学家们对深海生物还知之甚少,也不太相信它们正受到威胁。现在,随着深海探测技术的发展,研究人员发现660多英尺,即200米深的海底生存着大量多种多样的物种。但与此同时,渔业人员也可以依靠技术到达以前更深的地方,进行海底拖网捕捞,而此种深海捕捞则可在几分钟内就把大自然几百年乃至几千年的一切毁灭。
    例如,世界上的许多种珊瑚在二百多米深的海底才能找到。此外,据估计世界上一些最高的海底山约有一半位于深海海底。这些海底隆起的地方,海洋生物特别丰富。
    这些深海生态系统为鱼类和其他生物提供生存、产卵、繁殖的场所,保护它们免遭大海流和猎食者的侵袭。此外,据信这些深海生态系统蕴藏着世界上最丰富的生命宝库,估计有五十万至一亿种生物生活在这些大体上未经勘探极脆弱的生态系统中。
    解析: 暂无解析

  • 第23题:

    单选题
    The author says that in some hot and dry areas it is advisable to _____.
    A

    build big lakes to store water

    B

    construct big pumping stations

    C

    channel water from nearby rivers to cropland

    D

    build small and cheap irrigation systems


    正确答案: C
    解析:
    细节题。第四段第二句提到,在热带干旱地区可“通过一些小规模的工程,例如在凹地收集雨水,旱时用泵抽雨水来灌溉附近的农田。”这是最便宜的供水方式。