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问题 解答题

朝阳小学美术组女生人数是男生人数的80%，女生比男生少4人．美术组男、女生各有多少人？

答案

4÷（1-80%），

=4÷20%，

=20（人），

20-4=16（人）；

答：美术组男生20人，女生16人．

完形填空

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单项选择题

从防污染的角度出发，CBT应尽量选择在（）。

A、首尖舱

B、尾尖舱

C、边舱
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