本课配套习题挑战模式1/5

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单选题
难度系数:

1.

一物体的质量是2kg,用手按在水中浸没时受到的浮力是40N,则物体密度是(  )


A:

0.5×103千克/米3

B:

0.75×103千克/米3

C:

2×103千克/米3

D:

1.5×103千克/米3

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