【单选题】【消耗次数：1】
1是自然数中最小的数。（ ）
①
正确
②
错误
参考答案：
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相关题目
【单选题】
从1、2、3、…、100这100个自然数中挑选出20个互不相邻的自然数，有多少种方法?（ ）。
①
<img src=http://60.205.157.60/course/a@1FE94D396B95EC1617997801C3B9906E.png title=A.png alt=A.png/>
②
<img src=http://60.205.157.60/course/a@10A7FDB1FC69432B7EBFE6B63205F987.png title=B.png alt=B.png/>
③
<img src=http://60.205.157.60/course/a@1F4C18F61941B58C6AB45739962FFA5F.png title=C.png alt=C.png/>
④
<img src=http://60.205.157.60/course/a@079FF2073C853A0C6A3662D82A25FF8E.png title=D.png alt=D.png/>
随机题目
【单选题】
_________ the early nineteenth century, people did not use stamps.
①
In
②
On
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As
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For
【单选题】
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looking
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watching
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listening
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why
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what
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where
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when
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height
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How many
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How often
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How long
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I asked some policemen to tell me the way home. They smiled and answered me_________ .
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slowly
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heavily
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rudely
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difficulty
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disagreement
④
distance
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message
②
information
③
idea
④
advice