A:
B:不够
C:
如图所示,甲木块的质量为m1,以速度v沿光滑水平地面向前运动,正前方有一静止的、质量为m2的乙木块,乙上连有一轻质弹簧.甲木块与弹簧接触后( )
swimming, Zip ,often,the,water, in , goes.(连词成句)
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