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单选题
Oil is a nonrenewable resource, whereas sunshine is limitless. So why not run cars on solar power? Because a car powered by solar collecting panels would be fine on a sunny day, but as soon as the sun went behind a cloud, the car would no longer function. Which of the following is presupposed in the argument against running a car on solar power?
A
Solar power is cleaner than fossil fuels, and it involves less geopolitical risk.
B
In most of the northern hemisphere, it can be expected that more than 150 days a year will be cloudy.
C
No system exists for storing solar energy for a car’s use when the car is not in direct sunlight.
D
No one has yet introduced a commercially viable process for mass-producing solar cells that convert more than 10 percent of incoming sunlight into usable energy.
E
Consumers accustomed to the rapid acceleration of gasoline-powered cars will not accept the weak acceleration of solar-powered cars.
参考答案
参考解析
解析：
文段中提到，只要太阳一下山太阳能轿车就无法使用，可以推断得出此结论的前提是：不存在某种太阳能存储装置，故本题应选C项。
文段中提到，只要太阳一下山太阳能轿车就无法使用，可以推断得出此结论的前提是：不存在某种太阳能存储装置，故本题应选C项。
更多 “单选题Oil is a nonrenewable resource, whereas sunshine is limitless. So why not run cars on solar power? Because a car powered by solar collecting panels would be fine on a sunny day, but as soon as the sun went behind a cloud, the car would no longer function. Which of the following is presupposed in the argument against running a car on solar power?A Solar power is cleaner than fossil fuels, and it involves less geopolitical risk.B In most of the northern hemisphere, it can be expected that more than 150 days a year will be cloudy.C No system exists for storing solar energy for a car’s use when the car is not in direct sunlight.D No one has yet introduced a commercially viable process for mass-producing solar cells that convert more than 10 percent of incoming sunlight into usable energy.E Consumers accustomed to the rapid acceleration of gasoline-powered cars will not accept the weak acceleration of solar-powered cars.” 相关考题
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考题
One day a woman got into her car and started driving home after work.Suddenly, she saw a yellow car behind her.The driver was a man.When she turned left, the yellow car turned left.When she turned right, the yellow car turned right, (1) When she stopped at the traffic lights, the yellow car stopped(2)her.The woman was afraid,so she drove quickly to the police station.She was very surprised when she found the car stopped behind her.At that time, a young man was standing outside the police station.The woman was very happy to see him.She knew that he was a policeman because he was (3)a police uniform. She jumped out of her car and ran to the policeman.She asked him to arrest the man in the yellow car, so the policeman walked to the manThe man didn' t try to run(4)when he saw the policeman He just smiled and said to the woman."I want to give this purse ack to you, madam.I think you (5) it on the street.”(完型填空)A.WearingB.BehindC.TooD.DroppedE.Away
考题
Ten workers in China pushed their boss's car three miles home after an office party because they were all too drunk to drive. The group was enjoying a meal at a restaurant in downtown Changchun, Jilin Province (northeast China). When the party was over, Boss Zhang Fei found that he was too drunk to drive. Then suddenly they realized nobody had stayed sober enough to drive his car.Drink-driving was listed as a dangerous offence in China in 2014, esp. when the driver is drunk. Those who break the law will have their driving license revoked, face a heavy fine and may be put in jail. Zhang did not want to leave his car downtown and it was too late to call out another driver to drive the car for him. Someone then suggested they push the car home, and said that the exercise would do them all good. Thus, all ten quickly agreed and set off with Zhang at the wheel. All ten workers pushed their boss's car home through the city streets, laughing and singing during the 45-minute journey. Passers-by were shocked to see the group.Traffic officers said that as long as the car's engine was not running, it would not be classed as drink-driving under the law. However, it is still very dangerous for so many people to push the car along the road, as it may cause traffic accidents.1. ______ workers in China pushed their boss's car home in _______ minutes.A. 45, 10B. 3, 8C. 10, 452. Drink-driving was listed as a dangerous offence in China in __________.A. 2013B. 2014C. 20153. Those who break the law may _______.A. not have their driving license revokedB. not face a heavy fineC. be put in jail4. People pushing the car along the road would not be classed as drink-driving because _______.A. the car engine was not runningB. those people didn't drinkC. there were no police on the road5. We can infer from the passage that drink-driving _________ the law.A. is not againstB. is againstC. has nothing to do with
考题
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考题
—Why didn‘t you buy a new car？ —I would have bought one if I _______ enough money. A. had B. have had C. would have D. had had
考题
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共用题干
California Gives Green Light to Space Solar PowerEnergy beamed down from space is one step closer to reality,now that California has given the green light to an agreement that would see the Pacific Gas and Electric Company buy 200 megawatts（兆瓦）of power beamed down from solar-power satellites beginning in 2016.But some major challenges will have to beovercome if the technology is to be used widely.A start-up company called Solaren is designing the satellites,which it says will use radio waves to beamenergy down to a receiving station on Earth.The attraction of collecting solar power in space is the almost uninterrupted sunshine available in geo- synchronous（与地球同步的）orbit. Earth-based solar cells , by contrast , can only collect sun light during day-time and when skies are clear.But space-based solar power must grapple（努力克服）with the high cost per kilogram of launching things in- to space,says Richard Schwartz of Purdue University in West Lafayette,Indiana."if you're talking about it being economically viable for power of the Earth,it's a tough go,"he says.Cal Boerman,Solaren's director of energy services,says the company designed its satellites with a view to keeping launch costs down."We knew we had to come up with a different,revolutionary design,"he says. A patent the company has won describes ways to reduce the system's weight,including using inflatable mir- rors to focus sunlight on solar cells,so a smaller number can collect the same amount of energy.But using mirrors introduces other challenges,including keeping the solar cells from overheating,says Schwartz."You have to take care of heat dissipation（散发）because you're now concentrating a lot of energy in one place,"he says.According to the company's patent,Solaren's solar cells will be connected to radia-tors to help keep them cool.Though Boerman says the company believes it can make space-based solar power work,it is not expec-ting to crowd out other forms of renewable energy.Laws in California and other states require increasing use of renewable energy in coming years,he points out."To meet those needs,we're going to need all types of renewable energy sources,"he says.Solaren is going to design 200 solar-power satellites.A:RightB:WrongC:Not mentioned
考题
共用题干
A Ride in a Cable-carA ride in a cable-car is one of the exciting and enjoyable experiences a child can have.InSwitzerland,which is the home of the cable-car,it is used mostly to take tourists up the slope of a mountain,to a restaurant from which one can have a bird-eye view of the surrounding country, or to a top of a ski-run,from which,in winter,skiers glide down the snow covered the slope on skis .In Singapore,however,the cable-car takes one from the summit of a hill on the main island to a low hill on Sentosa,a resort island just off the southern coast.The cable-car is really a carriage which hangs from a strong steel cable suspended in the air.It moves along the cable with other cars on pulleys,the wheels of which are turned by electric motors. The cars are painted in eye-catching colours and spaced at regular intervals.Each car can seat up six persons.After the passengers have entered a car,they are locked in from outside by an attendant,they have no control over the movement of the car.Before long,the passengers get a breath-taking view through the glass windows of the modern city,the bustling harbour,and the several islands off the coast. The car is suspended so high in the air that slips on the sea look like small boats,and boats like toys.On a clear day,both the sky above and the sea below look beautifully blue.In contrast to the fast-moving traffic on the ground,the cars in the air move in a leisurely manner,allowing passengers more than enough time to take in the scenery during the brief trip to the island of Sentosa.After a few hours on Sentosa,it will be time again to take a cable-car back to Mount Faber. The return journey is no less exciting than the outward trip. The short trip does not bother passengers who want a good view because______.A: the cars move slowlyB: the cars move quicklyC: the cars are suspended very highD: the cars have glass windows
考题
共用题干
California Gives Green Light to Space Solar PowerEnergy beamed down from space is one step closer to reality,now that California has given the green light to an agreement that would see the Pacific Gas and Electric Company buy 200 megawatts（兆瓦）of power beamed down from solar-power satellites beginning in 2016.But some major challenges will have to beovercome if the technology is to be used widely.A start-up company called Solaren is designing the satellites,which it says will use radio waves to beamenergy down to a receiving station on Earth.The attraction of collecting solar power in space is the almost uninterrupted sunshine available in geo- synchronous（与地球同步的）orbit. Earth-based solar cells , by contrast , can only collect sun light during day-time and when skies are clear.But space-based solar power must grapple（努力克服）with the high cost per kilogram of launching things in- to space,says Richard Schwartz of Purdue University in West Lafayette,Indiana."if you're talking about it being economically viable for power of the Earth,it's a tough go,"he says.Cal Boerman,Solaren's director of energy services,says the company designed its satellites with a view to keeping launch costs down."We knew we had to come up with a different,revolutionary design,"he says. A patent the company has won describes ways to reduce the system's weight,including using inflatable mir- rors to focus sunlight on solar cells,so a smaller number can collect the same amount of energy.But using mirrors introduces other challenges,including keeping the solar cells from overheating,says Schwartz."You have to take care of heat dissipation（散发）because you're now concentrating a lot of energy in one place,"he says.According to the company's patent,Solaren's solar cells will be connected to radia-tors to help keep them cool.Though Boerman says the company believes it can make space-based solar power work,it is not expec-ting to crowd out other forms of renewable energy.Laws in California and other states require increasing use of renewable energy in coming years,he points out."To meet those needs,we're going to need all types of renewable energy sources,"he says.Many countries will grant permission for the use of space-based solar power soon.A:RightB:WrongC:Not mentioned
考题
共用题干
California Gives Green Light to Space Solar PowerEnergy beamed down from space is one step closer to reality,now that California has given the green light to an agreement that would see the Pacific Gas and Electric Company buy 200 megawatts（兆瓦）of power beamed down from solar-power satellites beginning in 2016.But some major challenges will have to beovercome if the technology is to be used widely.A start-up company called Solaren is designing the satellites,which it says will use radio waves to beamenergy down to a receiving station on Earth.The attraction of collecting solar power in space is the almost uninterrupted sunshine available in geo- synchronous（与地球同步的）orbit. Earth-based solar cells , by contrast , can only collect sun light during day-time and when skies are clear.But space-based solar power must grapple（努力克服）with the high cost per kilogram of launching things in- to space,says Richard Schwartz of Purdue University in West Lafayette,Indiana."if you're talking about it being economically viable for power of the Earth,it's a tough go,"he says.Cal Boerman,Solaren's director of energy services,says the company designed its satellites with a view to keeping launch costs down."We knew we had to come up with a different,revolutionary design,"he says. A patent the company has won describes ways to reduce the system's weight,including using inflatable mir- rors to focus sunlight on solar cells,so a smaller number can collect the same amount of energy.But using mirrors introduces other challenges,including keeping the solar cells from overheating,says Schwartz."You have to take care of heat dissipation（散发）because you're now concentrating a lot of energy in one place,"he says.According to the company's patent,Solaren's solar cells will be connected to radia-tors to help keep them cool.Though Boerman says the company believes it can make space-based solar power work,it is not expec-ting to crowd out other forms of renewable energy.Laws in California and other states require increasing use of renewable energy in coming years,he points out."To meet those needs,we're going to need all types of renewable energy sources,"he says.Space-based solar cells could collect solar power only when skies are clear.A:RightB:WrongC:Not mentioned
考题
资料：“Our cars are for people who want something different.”
This has been the slogan for over 50 years of Suprema Cars, a manufacturer of an English sports car. The car is mostly handmade in the company's factory in northern England. Suprema Car produces approximately 500 cars a year. About 5 years ago, the company began to lose sales and market share, and in the last two years, it has made a loss.
Recently, there have been problems with the labor force. The factory workers have demand higher wages and better working conditions. They are also unhappy because the management is insisting that they increase production, but the workers think this will have a bad effect on the quality of the cars.
The company still has many loyal customers. People buy Suprema sports cars because they are handmade and have an image of quality and craftsmanship.
Why do some customers still stick to Suprema Cars?
A.Because its products are handmade and qualified.
B.Because its name represents luxury.
C.Because the company is famous.
D.Because its products are cheap.
考题
共用题干
Computers in CarsYou're far from home on a lonely road.Shadowy forests stretch away on both sides.A thick mist（雾）makes it difficult to see far beyond your car's windshield（挡风玻璃）.“Can this be route 90A?”you wonder. if it is,you should be near a town.Yet there's no hint of one .Night is closing in.And you're low on gasoline.This is a situation where an in-car computer that can navigate would be a big help.A car computer that navigates?Yes!Such computers exist.Several experimental models are being tested by General Motors,Ford,Chrysler,and several foreign car makers.These computers vary in detail .But they all contain series of maps on videodiscs or videotapes.For example,one computer system contains 13,300 maps covering the continental US.Before starting out on a trip,a driver can type in the code for the region he or she plans to drive through .The computer then shows a map of that region.At the same time,a tiny radio re-ceiver linked to the computer goes to work.It picks up signals from navigation satellites such as the NAVSTAR network.Using these signals,the computer shows the car's position at all times and displays this position on the map.The computer can also calculate and display the best route to follow.A navigation computer may also receive and use data about road construction,weather condi- tions,and traffic jams.This information would be displayed to the driver and the computer would also use the information to work out alternate（交替的）routes.Most cars nowadays also contain computers that help cars run more efficiently .Microproces- sors（微处理机）control certain engine functions by regulating the mixing of fuel. Data on car speed,oil pressure,revolutions per minute,engine temperature,and fuel level can be displayed as digital data(numbers)or warning lights.Some auto designers suggest that a central computer display be used to clearly present such timely information as car speed and fuel level.Warning lights would indicate a drop in oil pres- sure or a sudden rise in engine temperature .To get more information on these conditions,the driver could call it up on the computer display screen.When needed,the computer could be “asked”to provide navigation aid or information about the car's condition. Without signals from navigation satellites,the in-car computer______.A: would still be able to locate the car's position at all timesB: would fail to locate the car's positionC: could still work out the best route to followD: would seek help from the radio receiver linked to it
考题
单选题According to the passage9 which of the following statements is NOT TRUE?A
Solar panels are very expensive to install.B
Sheridan Community Schools is completely solar-powered.C
In 2014, fewer than l,000 schools used solar power in the US.D
More and more schools are switching to solar power to cut costs.
考题
单选题She drove so fast at the turn that the car almost went ______ the road.A
onB
alongC
fromD
off
考题
单选题A
Automobile safety.B
Increasing fuel efficiency.C
Electricity-powered cars.D
The improvement of car batteries.
考题
单选题Would you mind if I use your car? Of course not.（）A
I'm sorry I can'tB
I'm afraid notC
It's over thereD
I have no car
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—Why did the car hit the boy?—Because the driver ______ on the phone at that time.A
talkB
is talkingC
was talkingD
have talked
考题
单选题What is the fourth paragraph of the passage mainly about?A
The ways to use solar power.B
The advantages of solar power.C
The places to build the solar power plants.D
The difficulties of putting solar power to use widely.
考题
单选题You are transferring fuel from the storage tanks to the day tanks by means of an electric fuel oil transfer pumpIf the pump motor catches fire, you would FIRST （）.A
secure the fuel manifoldB
shut off power to the pumpC
shut off the power ventilationD
spray water on the fire
考题
问答题A bridge would cost far more than a tunnel, but you would be able to go by rail or by car on a bridge, whereas a tunnel would provide a rail link only.
考题
单选题The driver stopped his car so abruptly that he was hit by the cab right behind him.A
impolitelyB
violentlyC
suddenlyD
maladroitly
考题
单选题—Why do people there ______ use umbrellas in the sun?—Because they would rather enjoy the sunshine.A
hardlyB
oftenC
alwaysD
sometimes
考题
单选题A sidereal day is shorter than a solar day. This difference is due to（）.A
irregularities in the daily rotational rate of the SunB
the space motion of the solar systemC
the precession of the equinoxesD
the use of different reference points
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