发布时间:2025-02-01 08:16:40
表达清楚可以啦。就这样吧。
下图参考:
左12通,右34通,中间全部不通。
打湿的木头横着放在水平面只有朝太阳的一面打湿 并在太阳下面晒 木头是会向上弯还是向下弯 原因是
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