网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
Nuclear power plants in Europe have been forced to____electricity production becauseof warmer-than-usual seawater.
A、cutin
B、cut off
C、cut out
D、cut back
B、cut off
C、cut out
D、cut back
参考答案
参考解析
解析：由于海水温度高于正常水平，欧洲核电站被迫XX发电。cut in打断、插入; cutoffr切段、 中断(供给); cut out删掉、戒除; cut back削减、减少(开支等)。根据句意，本题选B.
更多 “ Nuclear power plants in Europe have been forced to____electricity production becauseof warmer-than-usual seawater. A、cutin B、cut off C、cut out D、cut back ” 相关考题
考题
The _____ power of the people in this town has been decreasing since most young people have left for the big cities.
A.shoppingB.purchasingC.enduringD.spending
考题
47) In Europe, as elsewhere, multi-media groups have been increasingly successful: groups which bring together television, radio newspapers, magazines and publishing houses that work in relation to one another.
考题
DBatteries can power anything from small sensors to large systems. While scientists are finding ways to make them smaller but even more powerful, problems can arise when these batteries are much larger and heavier than the devices themselves. University of Missouri(MU) researchers are developing a nuclear energy source that is smaller, lighter and more efficient.“To provide enough power, we need certain methods with high energy density(密度)”，said Jae Kwon, assistant professor of electrical and computer engineering at MU. “The radioisotope(放射性同位素) battery can provide power density that is much higher than chemical batteries.”Kwon and his research team have been working on building a small nuclear battery, presently the size and thickness of a penny, intended to power various micro / nanoelectromechanreal systems (M/NEMS). Although nuclear batteries can cause concerns, Kwon said they are safe.“People hear the word ‘nuclear’ and think of something very dangerous,” he said, “However, nuclear power sources have already been safely powering a variety of devices, such as pace-makers, space satellites and underwater systems.”His new idea is not only in the battery’s size, but also in its semiconductor(半导体). Kwon’s battery uses a liquid semiconductor rather than a solid semiconductor.“The key part of using a radioactive battery is that when you harvest the energy, part of the radiation energy can damage the lattice structure(晶体结构) of the solid semiconductor,” Kwon said, “By using a liquid semiconductor, we believe we can minimize that problem.”Together with J. David Robertson, chemistry professor and associate director of the MU Research Reactor, Kwon is working to build and test the battery. In the future, they hope to increase the battery’s power, shrink its size and try with various other materials. Kwon said that battery could be thinner than the thickness of human hair.71. Which of the following is true of Jae Kwon?A. He teaches chemistry at MU.B. He developed a chemical battery.C. He is working on a nuclear energy source.D. He made a breakthrough in computer engineering.
考题
Liquid semiconductor is used to _________.A. get rid of the radioactive wasteB. test the power of nuclear batteries.C. decrease the size of nuclear batteriesD. reduce the damage to lattice structure.
考题
(15 minutes)Directions :Read the following text. Choose the best word or phrase for each numbered blank and mark A , B, C or D on ANSWER SHEET1.In addition to the established energy sources such as gas ,coal ,oil and nuclear ,there are a num-ber of other sources that we ought to consider. Two of these are hydroelectric and tidal power. These two sources are (21) in that they are both renewable. (22) ,hydropower is more widely used than tidal.ln (23) ,a substantial amount of electricity is already produced in HEP (hydroelectric power)stations worldwide, (24) tidal stations are stillin the very early (25) of development. .As far as geographical (26) is concerned ,HEP projects are to be found on lakes and rivers, whiletidal (27)are constructed only at river mouths where tidal (28) is great .Unfortunately these are (29) in number. At present HEP stations are found mainly in Norway ,Canada ,Sweden and Brazil ,whereas tidal plants are in (30) in France ,Russia and China.As regards capital (31) ,both require very high..investment. On the other hand ,generating(32) are quite low in both cases .ln fact,a large scale HEP plant is capable of producing power more (33) than conventional sources ,such as coal ,oil and nuclear plants. Tidal power also com-pares (34) with nuclear and oil generated electricity, (35) the amount of money on production.(36) HEP stations ,tidalconstructions have alonglife (37).Itis estimated thatthey can operate foroverl00 years. With respect to (38) 0f supply ,tidal stations (39) from HEP ones in that they often can only supply power (40). HEP stations ,however ,provide a constant supply of elec-tricity.21.[ A] compatible[ B ] parallel[ C] similar[ D] identical
考题
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
考题
Experiments of this kind ____ in both the U.S. and Europe well before the World War.
A have conductedB have been conductedC had conductedD had been conducted
考题
Solar cells have been developed primarily to ____ electric power for spacecraft.
A、ensureB、storeC、secureD、provide
考题
If he ______ forced to make a living from the outset, he would not have been able to follow his passion.
A、has beenB、would have beenC、had beenD、was
考题
共用题干
第一篇Putting Plants to WorkUsing the power of the sun is nothing new.People have had solar-powered calculators and buildings withsolar panels（太阳能电池板）for decades. But plants are the real experts. They' ve been using sunlight as anenergy source for billions of years.Cells in the green leaves of plants work like tiny factories to convert sunlight, carbon dioxide（二氧化 碳）,and water into sugarsand starche（淀粉）,stored energy that the piants can use. This conversion process is called photosynthesis (光合作用）Unfortunately, unless you' re a plant, it's difficult and expensive to convert sunlight into storable energy. That's why scientists are taking a closer look at exactly how plants do it.Some scientists are trying to get plants,or biological cells that act like plants, to work as very small photosynthesic power stations. For example, Maria Ghirardi of the National Renewable Energy Laboratory in Golden. Cobo.,is working with green algae（水藻）.She's trying to trick them into producing hydrogen instead of sugars when they perform photosynthesis. Once the researchers can get the algae working efficient- ly ,the hydrogen that they produce could be used to power fuel cells in cars or to generate electricity.The algae are grown in narrow-necked glass bottles to produce hydrogen in the lab. During photosynthe- sis , plants normally make sugars or strchds. "But under certain conditions,a lot of algae are able to use the sunlight energy not to store starch , but to make hydrogen."Ghirardi says. For example ,algae will produce hy-drogen in an airfree environment. It' s the oxygen in the air that prevents algae from making hydrogen most of the time.Working in an airfree environment, however, is difficult. It's not a practical way to produce cheap energy. But Ghirardi and her colleagues have discovered that by removing a chemical called sulfate（硫酸盐） from the environment that the algae grow in, they will make hydrogen instead of sugars,even when air is present.Unfortunately, removing the sulfate also makes the algae's cells work very slowly,and not much hydrogen is produced. Still ,the researchers see this as a first step in their goal to produce hydrogen efficiently from algae. With more work,they may be able to speed the cells' activity and produce larger quantities of hydrogen.The researchers hope that algae will one day be an easy-to-use fuel source. The organisms are cheap to get and to feed, Ghirardi says,and they can grow almost anywhere:"You can grow them in a reactor, in a pond. You can grow them in the ocean. There's a lot of flexibility in how you can use these organisms." How do plants relate to solar energy?A: They have been using it for billions of years.B: They are the real experts in producing it.C: They have been a source of it.D: They have been used to produce it.
考题
The revolution of machinery could __________without a new source of both movable and constant power in the new century.
A. be born
B. not have been born
C. have been born
D. have born
考题
共用题干
第三篇The Science of the FutureUntil recently,the"science of the future"was supposed to be electronics and artificial intelligence.Today it seems more and more likely that the next great breakthroughs in technology will be brought through a combination of those two sciences with organic chemistry and genetic engineering.This combination is the science of biotechnology.Organic chemistry enables us to produce marvelous synthetic（合成的）materials. However,it is still difficult to manufacture anything that has the capacity of wool to conserve heat and also to absorb moisture.Nothing that we have been able to produce so far comes anywhere near the combination of strength,lightness and flexibility that we find in the bodies of ordinary insects.Nevertheless,scientists in the laboratory have already succeeded in"growing"a material that has many of the characteristics of human skin.The next step may well be "biotech hearts and eyes"which can replace diseased organs in human beings.These will not be rejected by the body,as is the case with organs from humans.The application of biotechnology to energy production seems even more promising.In 1 996 the famous science-fiction writer,Arthur C. Clarke,many of whose previous predictions have come true,said that we may soon be able to develop remarkably cheap and renewable sources of energy.Some of these power sources will be biological.Clarke and others have warned us repeatedly that sooner or later we will have to give up ourdependence on non-renewable power sources.Coal,oil and gas are indeed convenient. However,using them also means creating dangerously high levels of pollution.It will be impossible to meet the growing demand for energy without increasing that pollution to catastrophic（灾难性的）levels unless we develop power sources that are both cheaper and cleaner.It is attempting to think that biotechnology or some other"science of the future"can solve our problems.Before we surrender to that temptation we should remember nuclear power.Only a few generations ago it seemed to promise limitless,cheap and safe energy.Today those promises lie buried in a concrete grave in a place called Chernobyl,in the Ukraine.Biotechnology is unlikely,however,to break its promises in quite the same or such a dangerous way.What do we learn from the last paragraph?A:Biotechnology can solve all our future energy problems.B:Biological power is cheaper than nuclear power.C:Biological power may not be as dangerous as nuclear power.D:Biological power will keep all its promises.
考题
单选题Although no proof yet exists of the electromagnetic disturbances observed being the results of nuclear weapons testing, diplomats are treating the situation with utmost delicacy.A
of the electromagnetic disturbances observed being the results of nuclear weapons testingB
regarding the observed electromagnetic disturbances having been the results of nuclear weapons testingC
that the electromagnetic disturbances observed were the results of nuclear weapons testingD
that nuclear weapons testing resulted in the electromagnetic disturbances having been observedE
that the electromagnetic disturbance observed were resulting from nuclear weapons testing
考题
问答题If increased income is spent on more and larger automobiles, larger houses, and increased consumption of other material goods, the results could cause catastrophic resource exhaustion, and pollution. Take the increase of the consumption of oil for instance. The consumption is so huge that the oil reserves might last only a decade or two if not supplemented by imports.Ten years ago it appeared that nuclear power would solve the anticipated energy crisis. Although supplies of uranium fuel were known to be limited and might become exhausted in half a century, the nuclear power plant has for a long time been a favorite project. But work on it has met with grave problems. The fear of possible atomic explosion and the problem of disposing of polluting byproduct waste have slowed down the construction of further nuclear plants. Eventually atomic technology may be able to control these problems, but at present there seems to be little agreement along atomic scientists about when this can be achieved.
考题
单选题According to the passage, which of the following statements is NOT true?A
The current deal is scheduled to be completed within half a year.B
What Toshiba buys is a nuclear power supplier.C
The purchased corporation is headquartered in Pennsylvania.D
New nuclear plants are likely to be built in India by Toshiba.
考题
单选题Due to the heavy rain and flooding, ten million people have been forced ______ their homes.A
leavingB
to leaveC
to be leftD
being left
考题
问答题In Germany, nuclear power has been a repeatedly argued and widely felt issue for decades.
考题
单选题In the second paragraph, the author mainly discusses ______. .A
the nuclear accidents in Japan last MarchB
nuclear power policies in GermanyC
German attitude towards nuclear powerD
the safety levels of nuclear power plants in Germany
考题
单选题Pills and lotions have been invented in Western Europe and North America_______.A
to protect people from sunburnB
to make people look wealthyC
to smooth people's skinD
to help people to have a quick tan
考题
单选题Which of the following is an appropriate title for this passage?A
Japan's Nuclear Crisis Causes Fear in Europe.B
The Chernobyl Disaster Helps Europe Better Understand Nuclear Power Energy.C
German Governments Supports Nuclear Power Energy.D
Germany Has Learnt a Lesson From Japan.
考题
问答题Practice 3 At first, as he adjusted pumps and checked temperatures, Aaron Boucher looked like any technician in the control room of an electrical plant. Then he rushed to the window and scanned the sky, to check his fuel supply. Mr. Boucher was battling clouds, timing the operations of his power plant to get the most out of patchy sunshine. It is a skill that may soon be in greater demand, for the world appears to be on the verge of a boom in a little-known but promising type of solar power. It is not the kind that features shiny panels bolted to the roofs of houses. This type involves covering acres of desert with mirrors that focus intense sunlight on a fluid, heating it enough to make steam. The steam turns a turbine and generates electricity. The technology is not new, but it is suddenly in high demand. As prices rise for fossil fuels and worries grow about their contribution to global warming, solar thermal plants are being viewed as a renewable power source with huge potential. After a decade of no activity, two prototype solar thermal plants were recently opened in the United States, with a capacity that could power several big hotels, neon included, on the Las Vegas Strip, about 20 miles north of here. Another 10 power plants are in advanced planning in California, Arizona and Nevada. On sunny afternoons, those 10 plants would produce as much electricity as three nuclear reactors, but they can be built in as little as two years, compared with a decade or longer for a nuclear plant. Some of the new plants will feature systems that allow them to store heat and generate electricity for hours after sunset. At Nevada Solar One the other day, Mr. Boucher, 30, ran the computerized control room. He was trying to produce as much electricity as possible while saving heat to tide the plant over as clouds cast episodic shadows on the solar array. “I’ve been fighting it all day,” he said. Imperceptibly, in the dusty wind of the high desert, 182,000 mirrors moved from east to west, tracking the sun across the sky.
考题
单选题According to the passage, which of the following about Europe is TRUE?A
It is dependent on Russia for gas and oil.B
It has put an end to fossil fuels.C
It had a major nuclear accident this year.D
It is likely that they would rethink their nuclear power policies.
考题
单选题The workmen have been told to increase the______ of their production.A
levelB
grade C
note D
mark
考题
单选题According to Nishida, the current buying decision by Toshiba is a response to ______A
fierce competition in nuclear power businessB
failure in other businesses like semiconductors and DVD playersC
popularity of nuclear power around the worldD
expected increase in market demand for nuclear power generation
考题
单选题What does the passage mainly discuss?A
The acquisition of British Nuclear Fuels by Toshiba.B
The acquisition of Westinghouse Electric by Toshiba.C
Toshiba’s expansion in nuclear power business.D
Toshiba’s embarking on nuclear power business.
考题
单选题According to the passage, all the following statements about Eastern Europe are true EXCEPT ______.A
they are eager to build new nuclear power plantsB
they have totally forgotten the Chernobyl accident 25 years agoC
they have improved their nuclear power plantsD
they want energy independence
考题
单选题Nuclear power plants are some of the largest producers of ______ wastes, with each plant producing barrels of radioactive material that must be stored in special protective containers.A
reasonableB
specialC
durableD
hazardous
热门标签
最新试卷
