单选题What is the role the T5 plays?A Throttles up and down to counteract the buffeting from air molecules.B Feels the subtle variations in Earth’s tug.C Helps accelerometers surive the launchD Provides powerful force to counteract the drag on Goce.

题目

单选题

What is the role the T5 plays?

Throttles up and down to counteract the buffeting from air molecules.

Feels the subtle variations in Earth’s tug.

Helps accelerometers surive the launch

Provides powerful force to counteract the drag on Goce.

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相似问题和答案

第1题：

"The trouble with being the Prime Minister's sister is it puts your life into perspective." is from the movie().

A、Love

A、ctually

B、Pocahontas

C、Tarzan

D、Air Force One

参考答案：A

第2题：

What can be concluded from the passage?

A. A fuelling ambition plays a leading role in one’s success.

B. A responsible adviser is more important than the knowledge of writing.

C. As to the growth of a genius, I.Q. doesn’t matter, but just his/her efforts.

D. What really matters is what you do rather than who you are.

正确答案：D

第3题：

（B）

The surprising experiment I am about to describe proves that air is all around you and that it proves down upon you. Air pressure is a wonderful force. When you swim underwater, you can feel water push down your body. The air all around you does the same. However, your body is so used to it that you do not notice this. The pressure is caused by a layer of air called the atmosphere. This layer surrounds the Earth, extending to about five kilometers above the Earth’s surface.

The following experiment is an easy one that you can do at home. But make sure that you are supervised, because you will need to use matches. Now foe the experiment！

What you need

?A hard-boiled egg without the shell

?A bottle with a neck slightly smaller than the egg

?A piece of paper

?A match

Metheod

1） Check that the paper will sit firmly on the neck of the bottle.

2） Tear the paper into strips and put the strips into the bottle.

3） Light the paper by dropping a burning match into the bottle.

4） Quickly sit the egg on the neck of the bottle.

Result

Astonishingly, the egg will be sucked into the bottle. Your friends will be amazed when you show them the experiment. But be careful when you handle matches.

Why it happened

As the paper burns, it needs oxygen and uses up the oxygen （air） in the bottle. The egg acts as a seal in the neck of the bottle, so no more air can get inside. This reduces the air pressure inside the bottle. The air pressure must equalize, so more air from outside must enter the bottle. The outside air pressure against the egg and then the egg is pushed into the bottle! The proves that air is all around and that it is pressing down on it.

60. Why is there the need to take care when you are doing the experiment?

A. The bottle could break.

B. You need to light the paper with a match.

C. The egg needs to be shelled.

D. The egg has to be perfectly placed on the neck of the bottle.

正确答案：B

第4题：

Geothermal(地热)Energy
　　1 Since heat naturally moves from hotter regions to cooler ones, the heat from the earth's center flows outwards towards the surface. In this way, it transfers to the next layer of rock. If the temperature is high enough, some of this rock melts and forms magma(岩浆). The magma ascends in its turn towards the earth's surface. It often remains well below the earth's surface, creating vast areas of hot rock. In such regions, there are deep cracks, which allow rainwater to descend underground. Some of the heated rainwater travels back up to the earth's surface where it will appear as a hot spring. However, if this ascending hot water reaches a layer of impermeable(不可渗透的)rock, it remains trapped, forming a geothermal reservoir. If geothermal reservoirs are close enough to the surface, they can be reached by drilling wells. Hot water and steam shoot up the wells naturally, and can be used to produce electricity in geothermal power plants.
　　2.A few geothermal power plants depend on dry-stem reservoirs which produce steam but little or no water. In these cases, the steam is piped up directly to provide the power to spin a turbine generator. The first geothermal power plant, constructed at Lardarello in Italy, was of this type, and is still producing electricity today.
　　3.Most currently operating geothermal power plants are either "flash" steam plants or binary(双重的)plants. Flash plants produce mainly hot water ranging in temperature from 300° to 700°Fahrenheit. This water is passed through one or two separators where released from the pressure of the underground reservoir, it "flashes" or boils into steam Again, the force of this steam provides the energy to spin the turbine and produce electricity. The geothermal water and steam are then reinjected directly back down into the earth to maintain the volume and pressure of the reservoir. Gradually they will be reheated and can then be used again.
　　4.A reservoir with temperatures below 300° Fahrenheit is not hot enough to flash steam but it can still be used to generate electricity in binary fluid. The steam from this is used to power the turbines. As in the flash steam plant, the geothermal water is recycled back into the reservoir.
文章(23~30)

Paragraph1_____

A.Dry steam plants
B.Binary plants
C.Origin of geothermal energy
D.Generation of electricity
E.Flash steam plants
F.Recyclable water and steam

答案：E

解析：

第5题：

What is the function of an air receiver in the compressed air system on a ship?

A.Condenses moisture

B.Provides overpressure protection

C.Purifies the air

D.Acts as an accumulator

正确答案：D

第6题：

When birds ____, the air under their wings helps push them up.

A、mirror

B、sink

C、glide

D、wet

正确答案：C

第7题：

A mean sun is used as the reference for solar time for three reasons. Which reason is NOT a cause for use of a mean sun?

A.The motion of the apparent sun is along the ecliptic

B.Measurement of time is along the celestial equator

C.The speed of the Earth's revolution is not constant

D.There are variations in the Earth's rotational speed

正确答案：B

第8题：

The experiment is carried cut to prove ______.

A. water pushes on your body when you swim underwater.

B. the earth is surrounded by a layer of air called the atmosphere.

C. the pressure of air around us has a powerful force.

D. the air pressure is not equalized around us.

正确答案：C

第9题：

You are attempting to administer CPR to a victim．When you blow into his mouth it is apparent that no air is getting into the lungs．What should you do ________．

A.Blow harder to force the air past the tongue

B.Raise the victim's head higher than his feet

C.Press on the victim's lungs so that air pressure will blow out any obstruction

D.Re-tip the head and try again

正确答案：D

第10题：

共用题干
第一篇

A Sunshade（遮阳伞）for the Planet

Even with the best will in the world,reducing our carbon emissions is not going to prevent global warming. It has become clear that even if we take the most strong measures to control emissions, the uncertainties in our climate models still leave open the possibility of extreme warming and rises in sea level. At the same time,resistance by governments and special interest groups makes it quite possible that the actions suggested by climate scientists might not be implemented soon enough.
Fortunately,if the worst comes to the worst,scientists still have a few tricks up their sleeves. For the most part they have strongly resisted discussing these options for fear of inviting a sense of complacency that might thwart efforts to tackle the root of the problem. Until now,that is a growing number of researchers are taking a fresh look at large-scale"geoengineering"projects that might be used to counteract global warming."I use the analogy of methadone,"says Stephen Schneider,a climate researcher at Stanford University in California who was among the first to draw attention to global warming."If you have a heroin addict,the correct treatment is hospitalization,and a long rehab. But if they absolutely refuse,methadone is better than heroin."
Basically the idea is to apply"sunscreen"to the whole planet. One astronomer has come up with a radical plan to cool Earth:launch trillions of feather-light discs into space,where they would form a vast cloud that would block the sun's rays.It's controversial,but recent studies suggest there are ways to deflect just enough of the sunlight reaching the Earth's surface to counteract the warming produced by the greenhouse effect. Global climate models show that blocking just 1.8 percent of the incident energy in the sun's rays would cancel out the warming effects produced by a doubling of greenhouse gases in the atmosphere.That could be crucial,because even the most severe emissions control measures being proposed would leave us with a doubling of carbon dioxide by the end of this century,and that would last for at least a century more.

What is Stephen Schneider's idea of preventing global warming?
A:To ask governments to take stronger measures.
B:To increase the sunlight reaching the Earth.
C:To apply sunscreen to the Earth.
D:To decrease greenhouse gases.

答案：C

解析：

题干意思为：通过前两段，作者认为……第一段第一句：Even with the best will in the world , reducing our carbon emissions is not going to prevent global warming．即使怀着世间最美好的愿望，减少碳排放也不会阻止全球变暖。第二段第一句：Fortunately , if the worst comes to the worst , scientists still have a few tricks up their sleeves．幸运的是，如果情况越来越糟，科学家们还有一些应对措施。通过这两句可以明显地看出，作者对限制排放是持反对态度的，认为限排不能解决问题，所以选择B项。
题干意思为：科学家们反对人们对他们的选择进行讨论，因为他们不想让人们知道……第二段第二句：For the most part they have strongly resisted discussing these options for fear of inviting a sense of complacency that might thwart efforts to tackle the root of the problem.他们反对人们讨论这些选择的主要原因是担心引起自满情绪，从而使得从根本上解决问题的努力受挫。经过分析，只有C选项正确。
题干意思为：Stephen Schneider提到毒瘾和美沙酮疗法的用意何在？第二段最后一句：If you have a heroin addict , the correct treatment is hospitalization , and a long rehab.But if they absolutely refuse , methadone is better than heroin．如果你有毒瘾，那么最好的方法是住院治疗，进行长时间恢复，但是如果都不管用的话，美沙酮总比海洛因强。显然他是要说明 Methadone is an effective way to treat a hard heroin addict（美沙酮对毒瘾很深的人是有治疗效果的）。因此选项A正确。
题干意思为：Stephen Schneider阻止全球变暖的方法是什么？文中最后一段第一句：Basically the idea is to apply " sunscreen" to the whole planet．这种方法基本上是要为整个地球涂上一层“遮光剂”。经过分析，选项C正确。
题干意思为：根据最后一段，对于遮光剂的有效性的表述，哪一句是错误的？D选项It decreases greenhouse gases in the atmosphere（减少大气层温室气体排放）正好与该方法冲突，所以该项不正确。

单选题What is the role the T5 plays?A Throttles up and down to counteract the buffeting from air molecules.B Feels the subtle variations in Earth’s tug.C Helps accelerometers surive the launchD Provides powerful force to counteract the drag on Goce.

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