分析 这篇短文主要给我们介绍了一些关于星球的天文知识. 宇宙当中的行星.其中星星不只有我们看到的白色,还有红色和蓝色,这些都是死去的星星.星星考气体燃烧发光,当气体用尽,星星便会死去.而太阳被证实不会死去.
解答 74.D 细节理解题.As a star's gases burn,they give off light and heat.But when the gas runs out,the star stops burning and begins to die.可见当气体用完时,恒星停止燃烧并开始死亡.所以答案选D.
75.B 细节理解题.根据句子That's how tightly this dead star,a black hole,is packed,可见黑洞是死星A选项正确;The light from a black hole can never come back to your eyes.That's why you see nothing but blackness.可见黑洞是看不见的所以C选项正确;A black hole is so tightly packed that its gravity sucks in everything-even light.可见黑洞是有万有引力的,所以D选项正确.但是B选项的内容文中没有提到,所以答案选B.
76.A 细节理解题.根据句子If the star was very small,the star ends up as a cold,dark ball called a black dwarf.可见black dwarf是小的,黑的而且是冷的,所以A选项的说法是错误的,故答案选A.
77.D 细节理解题.根据句子A black hole is so tightly packed that its gravity sucks in everything-even light.The light from a black hole can never come back to your eyes.黑洞是如此紧密地包裹着,以至于它的引力会被所有的东西所吸收,即使是光,黑洞里的光也不会再回到你的眼睛里.可见黑洞的引力很强,它会把光线吸进去.所以答案选D.
点评 本文浅显易懂,各个小题都能在文中找到适当依据.只要认真阅读短文,注意前后联系,就能顺利完成阅读.文章所设试题主要考察细节查找,做题关键是找出原文的根据,认真核查小题和原文的异同.
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