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20楼#
发布于：2016-10-21 22:19
bbbaobeixmx：用分割法求解，阴影的面积是小正方形面积的4分之1，就是36乘4分之1，等于9回到原帖  |
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21楼#
发布于：2016-10-21 22:34
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22楼#
发布于：2016-10-22 09:23
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23楼#
发布于：2016-10-22 09:23
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24楼#
发布于：2016-10-22 11:27
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25楼#
发布于：2016-12-17 20:17
DDDDDDDDDDDDDDDDDD
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26楼#
发布于：2017-01-12 18:00
C SOEASY
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