问题 单项选择题

在世界市场上,中国生产的汽车比其他国家生产的汽车要便宜得多,因此其他国家的汽车工业将失去一部分汽车市场,而这些市场将被中国汽车占据。
以下哪一项是上述论述所要假设的( )
Ⅰ.中国汽车的油耗比其他国家汽车的油耗更低
Ⅱ.价格是汽车购买者考虑的重要因素
Ⅲ.中国的汽车和其他国家的汽车耐用性基本相同
Ⅳ.汽车购买者具有较高的品牌忠诚度

A.Ⅰ和Ⅱ
B.Ⅰ、Ⅱ和Ⅲ
C.Ⅱ、Ⅲ和Ⅳ
D.Ⅱ和Ⅲ

答案

参考答案:D

解析: 题干的论点为因为价格低所以中国汽车将抢占市场,即价格是顾客购买的重要因素,同时汽车耐用性也要相同,否则便体现不出价格的优势。品牌忠诚度正好削弱了价格因素对市场的影响。所以Ⅱ和Ⅲ为必要因素。故选D。

阅读理解

LONDON—Scientists have found an unusual way to prevent our planet from overheating: move it to a cooler spot. All you have to do is to send a few comets (彗星) in the direction of Earth, and its orbit (轨道) will be changed. Our world will then be sent moving into a safer older part of the solar system.

This idea for improving our climate comes from a group of US NASA (美国航空航天局) engineers and American astronomers. They say their plan could add another six billion years to the useful lifetime of our planet—hopefully doubling its working life.

The plan put forward by Dr. Laughlin, and his colleagues Don Korycansky and Fred Adams, needs carefully directing a comet or asteroid (小行星) so that it passes close by our planet and sends some of its gravitational energy (重力势能) to Earth.

“Earth’s orbital speed would increase as a result and we would move to a higher orbit away from the sun,” Laughlin said.

Engineers would then direct their comet so that it passed close to Jupiter (木星) or Saturn(土星). The comet would pick up energy from one of these giant planets. Later its orbit would bring it back to Earth, and the process would be repeated.

In the short term, the plan provides an ideal way to worldwide warming, although the team was actually worried about a much greater danger. The sun is certain to heat up in about a billion years and so “seriously compromise” our biosphere (生物圈)—by cooking us.

That’s why the group decided to try to save Earth.

The plan has one or two worrying sides, however. For a start, space engineers would have to be very careful about how they directed their asteroid or comet towards Earth. The smallest miscalculation (误算) in orbit could fire it straight at Earth—with deadly results.

There is also the question of the moon. As the present issue of Scientific American magazine points out, if Earth was pushed out of its present location, it is “most likely the moon would be stripped (剥离) away from Earth,” it states. This would greatly change our planet’s climate.

小题1:What makes the scientists plan to move Earth?

A.A few comets are moving to the direction of Earth.

B.Earth’s working life is coming to an end soon.

C.Earth will become too hot for mankind to keep alive.

D.The moon is moving farther and farther away from Earth.小题2:If the plan is successful, Earth will have a working life of ________ years.

A.12 billion

B.6 billion

C.18 billion

D.24 billion小题3:What serious problems might the plan cause according to the passage?

A.The comet might hit Earth and man might lose the moon.

B.Earth might be moved too far away and man might die because of the coldness.

C.The comet might hit Jupiter or Saturn and never return to Earth.

D.Earth’s working life might be greatly shortened.小题4:What does the underlined word “compromise” mean?

A.provide

B.benefit (受益)

C.share

D.endanger

单项选择题