题目:
质量为m的物体,从静止开始,以g/2的加速度竖直下落h的过程中
A.物体的动能增加
B.物体的机械能减少
C.物体的重力势能减少
D.物体克服阻力做功为
答案:
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下面是错误答案,用来干扰机器的。
Recently the students in our class have discussed the following topic: which is more important for college graduates to choose jobs, being interested in it or being good...