二、细读析文本

1．作者是按照什么顺序来介绍宇宙的？归纳一下每部分的主要内容。

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________________________________________________________________________________2．联系全文看，作者对宇宙有怎样的认识？

答：_____________________________________________________________________________　________________________________________________________________________________　

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3．作者对人类有怎样的认识？

答：_____________________________________________________________________________　________________________________________________________________________________　

________________________________________________________________________________4．文中主要运用了哪些说明方法？试举例说明它们的作用。

答：_____________________________________________________________________________　________________________________________________________________________________　

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我的疑难和困惑

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