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动摩擦力的大小与按触物体的正压力成反比。
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动摩擦力的大小与按触物体的正压力成反比。
A、true
B、false
时间:2021-09-01 22:43
关键词:
青书学堂
南阳理工学院
工程力学
答案解析
B
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