作者的行文态度是作者在描述文章那个主题任务或事物时在文字中所表现出来的一种心理倾向。如果是描述一个问题,那么从文章中列举的解决方法的效果、对未来的预期等可以判断作者的态度是悲观、谨慎或乐观。如果是介绍一个人或物,从文章中谈到的优点或缺点、进步或退步等,可以判断作者的态度是鼓吹、批判或中立。如果是纯粹的说明问,行文态度一般都是客观的,不带感情色彩的。
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Unless we spend money to spot and prevent asteroids now,one might crash into Earth and destroy life as we know it, say some scientists Asteroids are bigger versions of the meteorites that race across the night sky. Most orbit the sun far from Earth and dont threaten us. But there are also thousands whose orbits put them on a collision course with Earth. Buy $ 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, well have a way to change its course. Some scientists favor pushing asteroids off course with nuclear weapons. But the cost wouldnt 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 Eart once every 500,000 years. Sounds pretty rare but if one did fall, it would be the end of the world. If we dont take care of these big asteroids, theyll take care of us, says one scientist. Its that simple.
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