曲别针作业网作业帮,慧海网手机教育考试作业频道
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作业帮
时间:2024/06/03 12:58:31
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(1)G=F=pS=2N,m=G/g=0.2kg
(2)h=p/密度g=0.09m;
F=pS=9N,G=mg=10N,因为F
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