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
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.
相似考题
更多“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.”相关问题
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第1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
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第2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
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第3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4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 NOT true of the effectiveness of"sunscreen",according to the last paragraph?
A:It deflects sunlight reaching the Earth to counteract the warming.
B:It blocks the incident energy in the sun's rays.
C:It is a controversial method.
D:It decreases greenhouse gases in the atmosphere.答案：D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。 -
第5题：
单选题The third paragraph plays what role in the passage?AIt summarizes all the points expressed in the first two paragraphs.
BIt raises new arguments that expand on those previously expressed.
CIt suggests a possible area for useful research in the future.
DIt rejects the arguments expressed in the first paragraph.
EIt provides concrete evidence against arguments expressed in the second paragraph.
正确答案： B解析：
推断题。第三段中使用Elgin Marbles的例子来反驳第二段中大英博物馆的观点，故本题应选E项。 -
第6题：
单选题The connecting rod is fitted between the crosshead and the crankshaftI t transmits the firing force, and together with the crankshaft converts the （）motion to a （）motion.Arotary；reciprocating
Bup and down；fore and aft
Cfore and aft；up and down
Dup and down；rotary
正确答案： A解析： 暂无解析 -
第7题：
单选题A vacuum is initially established in the first and second stages of a low pressure evaporator by the use of （）Avacuum drag from the auxiliary condensate system
Bindividual vacuum pumps
Ca single non-condensing air ejector
Da two stage air ejector
正确答案： C解析： 暂无解析 -
第8题：
单选题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?（）AThe motion of the apparent sun is along the ecliptic
BMeasurement of time is along the celestial equator
CThe speed of the Earth's revolution is not constant
DThere are variations in the Earth's rotational speed
正确答案： C解析： 暂无解析 -
第9题：
单选题The author concludes that only shared myths can help Americans ______.Ato bring about the uniformity of their culture
Bto regain their consensus about a common experience
Cto stay away from negative feelings in their life
Dto counteract the effects of consensus about society
正确答案： B解析：
推断题。答案出自第三段: Only a common myth can offer relief from the fear that life is without meaning or purpose. …Such myths help to ward off feelings of isolations, guilt, anxiety, and purposelessness--in short, they combat isolation and the breakdown of social standards and values. -
第10题：
单选题What is the basic principle of the magnetic compass?（）AMagnetic materials of the same polarity repel each other and those of opposite polarity attract
BThe Earth's magnetic lines of force are parallel to the surface of the Earth
CMagnetic meridians connect points of equal magnetic variation
DThe compass needle(s) will，when properly compensated，lie parallel to the isogonic lines of the Earth
正确答案： D解析： 暂无解析 -
第11题：
单选题The magnetic compass magnets are acted on by the horizontal component of the Earth’s total magnetic force. This magnetic force is GREATEST at the（）.Anorth magnetic pole
Bsouth magnetic pole
Cmagnetic prime vertical meridian
Dmagnetic equator
正确答案： D解析： 暂无解析 -
第12题：
单选题The transition of the Earth’s magnetic field is possibly caused by _____.Athe flows of melted iron inside the Earth
Bthe periodical movement of the Earth
Cthe mechanical energy of the solar system
Dthe force coming from outer space
正确答案： A解析：
文章最后一段：谁也不能准确地知道为什么地球磁场会周期性转换，但是科学家说其原因可能在于地壳中融化了的铁的无序流动，它们看起来就像木星上组成云的气体一样。 -
第13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
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第14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
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第15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。 -
第16题：
单选题To counteract these undesirable effects cylinder oils usually contain additives formulated to impart a high degree of （） and detergency.Asalinity
Balkalinity
Cacid
Dsanitary
正确答案： B解析： 暂无解析 -
第17题：
单选题What has the United Nations made up its mind to do from the passage?ASet an Earth Protecting Day
BProtect and love the earth
CHold an international meeting
DFind out what is making the pollution
正确答案： D解析：
由The United Nations的描述可知，他们已经决定要保护地球，爱护地球，因此答案为B项“Protect and love the earth”。 -
第18题：
单选题The four-stroke cycle begins with the piston （）.Acoming up from the BDC
Bcoming up from the TDC
Ccoming down from the BDC
Dcoming down from the TDC
正确答案： C解析： 暂无解析 -
第19题：
单选题When rigging a bosun’s chair，a tail block or lizard is used to（）.Aguide the bosun's chair down a stay when applying a protective coating
Brun paint or tools up to a sailor in a chair with a heaving line
Ckeep a bosun's chair from swinging with the ship's motion
Dreeve the gantline through
正确答案： B解析： 暂无解析 -
第20题：
单选题These students’ determination to face up to difficulties plays a crucial role in their success.Alive up to
Bstand up to
Cgo up to
Dadd up to
正确答案： C解析：
句意：这些学生敢于面对困难，对于其成功起了重要作用。face up to的意思是“勇敢面对”。stand up to经得起；抵抗；勇敢地面对。add up to总计，累计。 -
第21题：
单选题The force resulting from the earth’s rotation that causes winds to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere is called（）.Apressure gradient
BCoriolis effect
Caurora borealis
Dballistic deflection
正确答案： C解析： 暂无解析 -
第22题：
单选题The connecting rob is fitted between the crosshead and the crankshaftIt transmits the firing force, and together with the crankshaft convert the （） motion to a （） motion.Arotary；reciprocating
Bup and down；fore and aft
Cfore and aft；up and down
Dup and down；rotary
正确答案： C解析： 暂无解析 -
第23题：
单选题The purpose of an air compressor unloading device is to （）Adrain water from the air receiver
Bdrain water from the cylinders
Cdelay the compression process until the motor is up to speed
Dcheck pump alignment
正确答案： C解析： 暂无解析