题干

如图所示,A、B两个物块的重力分别是GA=3N,GB=4N,弹簧的重力不计,整个装置沿竖直方向处于静止状态,这时弹簧的弹力F=2N,则天花板受到的拉力和地板受到的压力,有可能是(  )

A:1 N和6 N

B:5 N和6 N

C:1 N和2  N

D:5 N和2 N

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答案(点此获取答案解析)

A,D

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