評論
打印
v. 預防，防止
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Passage 2
Unless we spend money to spot 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）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 $ 50 million worth of new telescopes right now. Then 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.
Some scientists favor pushing asteroids off course with nuclear weapons. But the cost wouldn’t be cheap.
Is it worth it? Two things experts consider when judging any risk are： 1) How likely the event is； and 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 of nuclear weapons sitting around on Earth? “ The world has less to fear from doomsday (毀滅性的）rocks than from a great nuclear fleet set against them，” said a New York Times article.
Which of the following best describes the author’s tone in this passage?
A. Optimistic. B. Critical.
C. Objective. D. Arbitrary.
| 重點單詞 | 查看全部解釋 | |||
| prevent | [pri'vent] |
想一想再看 |
聯想記憶 | |
| optimistic | [.ɔpti'mistik] |
想一想再看 adj. 樂觀的，樂觀主義的 |
||
| rare | [rɛə] |
想一想再看 adj. 稀罕的，稀薄的，罕見的，珍貴的 |
||
| strike | [straik] |
想一想再看 n. 罷工，打擊，毆打 |
||
| fatal | ['feitl] |
想一想再看 adj. 致命的，毀滅性的，決定性的 |
聯想記憶 | |
| objective | [əb'dʒektiv] |
想一想再看 adj. 客觀的，目標的 |
聯想記憶 | |
| collision | [kə'liʒən] |
想一想再看 n. 碰撞，沖突 |
||
| arbitrary | ['ɑ:bitrəri] |
想一想再看 adj. 任意的，專制的，武斷的，霸道的 |
聯想記憶 | |
| locate | [ləu'keit] |
想一想再看 vt. 把 ... 設置在，使坐落于，找出 |
聯想記憶 | |
| threaten | ['θretn] |
想一想再看 v. 威脅，恐嚇 |
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