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题型:阅读理解-阅读单选 难度:0.65 引用次数:245 题号:8206056

Electric cars are dirty. In fact, not only are they dirty, they might even be dirtier than their gasoline-powered cousins.

People in California love to talk about “zero-emissions vehicles”, but people inCalifornia seem to be clueless about where electricity comes from. Power plants mostly use fireto make it. Aside from the new folks who have their roofs covered with solar cells, we get ourelectricity from generators (发电机). Generators are fueled by something—usually coal, oil,but also by heat generated in nuclear power plants. There are a few wind farms andgeothermal (地热)plants as well, but by far we get electricity mainly by burning something.

In other words, those “zero-emissions” cars are likely coal-burning cars. It’s justbecause the coal is burned somewhere else, it looks clean. It is not. It’s as if the CaliforniaGreens are covering their eyes—“ If I can’t see it, it’s not happening.” Gasoline is anincredibly efficient way to power a vehicle; a gallon of gas has a lot of energy in it. But whenyou take that gas (or another fuel) and first use it to make electricity, you waste a nice partof that energy, mostly in the form of wasted heat—at the generator, through the transmissionlines, etc.

A gallon of gas may propel your car 25 miles. But the electricity you get from that gallonof gas won’t get you as far — so electric cars burn more fuel than gasoline-poweredones. If our electricity came mostly from nukes or geothermal, or hydro or wind or solar, thenan electric car truly would be clean. But for political, technical, and economic reasons, wedon’t use much of those energy sources.

In addition, electric cars’ batteries which are poisonous for a long time will eventuallyend up in a landfill. And finally, when cars are the polluters, the pollution is spread acrossall the roads. When it’s a power plant, though, all the junk is in one place. Nature is verygood at cleaning up when things are too concentrated, but it takes a lot longer when all thegarbage is in one spot.

1. What is the main idea of the text?
A.Electric cars are far from being clean.
B.Electric cars are better than gasoline-powered ones.
C.People cast doubts on electric cars’ batteries.
D.Gasoline is an efficient way to power a vehicle.
2. The electricity we get from a gallon of gas may make our car run____.
A.no less than 25 milesB.as far as 50 miles
C.less than 25 milesD.as far as 25 miles
3. According to the text, electric cars____.
A.are more environmentally friendly
B.burn more fuel than gas-powered ones
C.are very good at cleaning up when things are not too concentrated
D.are poisonous for a long time and will eventually end up in a landfill
4. It can be inferred from the text that____.
A.being green is good and should be encouraged in communication
B.electric cars are the dominant vehicles compared with their gas-poweredcousins
C.zero-emissions vehicles should be chosen to protect our environment
D.electric cars are not clean because we get electricity mainly by burning something
2019·湖北·一模 查看更多[5]

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The students now have support from their community. But the responses from officials have not been very satisfying. “Everyone is just breathing the air. And we will keep fighting.” says Taysia.

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4. What is the author’s purpose in writing the passage?
A.To push for environmentally friendly smartphones.
B.To discourage businesses from making smartphones.
C.To advise readers not to change smartphones often.
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