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班里黑板太滑写不上字怎么办
更新时间： 2020-10-02 00:00:00  

1、用粗糙的干抹布多擦几次；

2、用抹布蘸上稀大米粥在黑板上擦一遍，晾干即可；

3、用小米汤刷一次，快速风干；

4、用砂纸打磨光滑区域，增加摩擦。

关键词： 班里 黑板 怎么办

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