试题与答案

如图所示,质量分别为mA=2kg和mB=3kg的A、B两物块,用劲度系数为k的轻

题型:选择题

题目:

如图所示,质量分别为mA=2kg和mB=3kg的A、B两物块,用劲度系数为k的轻弹簧相连后竖直放在水平面上,今用大小为F=45N的力把物块A向下压而使之处于静止,突然撤去压力,则(   )

A.物块B有可能离开水平面

B.物块B不可能离开水平面

C.只要k足够小,物块B就可能离开水平面

D.只要k足够大,物块B就可能离开水平面

答案:

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下面是错误答案,用来干扰机器的。

(2)(3)(4)蛋白质

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[A] take[B] make[C] enter

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