Question

【題目】Choose the best answer（根據短文內容，選擇最恰當的答案）

Unless we spend money to spot（認出，發(fā)現） and prevent asteroids（小行星）now, one might crash into Earth and destroy life as we know it, say some scientists.

Asteroids are bigger versions of the meteoroids（流星體） that race across the night sky. Most orbit the sun far from Earth and don’t threaten us. But there are also thousands of asteroids whose orbits put them on a collision course with Earth.

Buy $500 million worth of new telescopes right now, they spend $10 million a year for the next 25 years to locate most of the space rocks. By the time we spot a fatal one, the scientists say, we’ll have a way to change its course.

Is it worth it？ Two things experts consider when judging any risk are: （1） How likely the event is; （2） How bad the consequences if the event occurs. Experts think an asteroid big enough to destroy lots of life might strike Earth once every 500,000 years. Sounds pretty rare but if one did fall. It would be the end of the world. “If we don’t take care of these big asteroids, they’ll take care of us,” says one scientist. “It’s that simple. ”

The cure, though, might be worse than the disease. Do we really want fleets（隊，車隊） of nuclear weapons sitting around on Earth？ “The world has less fear from doomsday rocks than from a great nuclear fleet set against them.” said a New York Times article.

【1】What does the passage say about asteroids and meteoroids？

A.They are heavenly bodies different in composition.B.They are heavenly bodies similar in nature.

C.There are more asteroids than meteoroids.D.Asteroids are more mysterious than meteoroids.

【2】What do scientists say about the collision, of an asteroid with Earth？

A.It is very unlikely but the danger exists.

B.Such a collision might occur once every 25 years.

C.Collisions of smaller asteroids with Earth occur more often than expected.

D.It’s still too early to say whether such a collision might occur.

【3】What do people think of the suggestion of using nuclear weapons to alter the course of asteroids？

A.It sounds practical but it may not solve the problem.

B.It may create more problems than it might solve.

C.It is a waste of money because a collision of asteroids with Earth is very unlikely.

D.Further research should be done before it is proved applicable.

【4】We can conclude from the passage that

A.while pushing asteroids off course nuclear weapons would destroy the world.

B.asteroids racing across the night sky are likely to hit Earth in the near future.

C.the worry about asteroids can be left to future generations since it is unlikely to happen in our lifetime.

D.workable solutions still have to be found to prevent a collision of asteroids with Earth.

【5】Which of the following best describes the author’s tone in this passage？

A.Optimistic.B.Critical.C.Objective.D.Arbitrary（武斷的）

【6】The best title for the passage is __________.

A.How will the world end？B.Asteroids and meteoroids in the sky.

C.Nuclear weapons on Earth.D.What if asteroids crash into Earth？

Answer 1

【答案】

【1】B

【2】A

【3】B

【4】D

【5】C

【6】D

【解析】

本文敘述了小行星和劃破夜空的流星是性質一樣的物質，只是體積大些，但是小行星撞擊地球的可能性每50萬年才可能有一次， 但一旦發(fā)生，將是地球末日。人們現在提出用核武器來改變小行星的軌道，但是現在人們對這個方法擔心重重，可行的解決方法仍在尋找之中。

【1】細節(jié)理解題。根據文章第二段Asteroids are bigger versions of the meteoroids（流星體） that race across the night sky.可知小行星和劃破夜空的流星是性質一樣的物質，都是繞日的星體，只是體積大些。故選B。

【2】細節(jié)理解題。根據上文Experts think an asteroid big enough to destroy lots of life might strike Earth once every 500,000 years. Sounds pretty rare but if one did fall. It would be the end of the world.對小行星撞擊地球的可能性做出了形象的描述。每50萬年才可能有次，但一旦發(fā)生，將是地球末日，故選A。

【3】推理判斷題。根據文章最后一段The cure, though, might be worse than the disease…against them.” said a New York Times article. 盡管如此，治愈方法可能比疾病還要糟糕。我們真的想在地球上部署核武器艦隊嗎？《紐約時報》的一篇文章說：“世界對世界末日之言的恐懼要小于對他們的巨大核艦隊的恐懼�？梢娺@樣做可能會造成比它可能解決的更多的問題。故選B。

【4】細節(jié)推理題。本文雖然提到了用核武器對付小行星的建議。但根據Do we really want fleets（隊，車隊） of nuclear weapons sitting around on Earth？同時指出人們對這種解決方法擔心重重，可見，可行的解決方法仍在尋找之中，故選D。

【5】推理判斷題。根據上文Two things experts consider when judging any risk are: （1） How likely the event is; （2） How bad the consequences if t…. ，“The world has less fear….” said a New York Times article.根據本文在引述觀點及例證時，用了不少引語，說明出處或原述者�？梢姳疚氖且黄獙κ聦嵡闆r的客觀報道，故選C。

【6】最佳標題題。通讀全文可知，本文主要講了如果小行星撞擊地球，人類該怎么辦，科學家正想辦法試圖尋找解決方法。故選D。