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?ASolar power is cleaner than fossil fuels, and it involves less geopolitical risk.BIn most of the northern hemisphere, it can be expected that more than 150 days a year will be cloudy.CNo system exists for storing solar energy for a car’s use when the car is not in direct sunlight.DNo 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.EConsumers accustomed to the rapid acceleration of gasoline-powered cars will not accept the weak acceleration of solar-powered cars.
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。
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