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【简答题】
长短轴长分别为1和2m的椭圆，在水平地面作纯滚动，在某瞬时其角速度为2rad/s,角加速度为 1rad/s2，其中短轴的一个顶点与地面接触。 此瞬时其最高点的切向加速度为（ ）m/s2。
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举一反三
【简答题】A．are involved B．involved C．involve D．have involved
【单选题】( )6.So involved with their computers________that leaders at summer computer camps often have to force them to break for sports and s.
A.
became the children
B.
become the children
C.
had the children become
D.
do the children become
【单选题】So involved with their computers________that leaders at summer computer camps often have to force them to break for sports and s.
A.
became the children
B.
become the children
C.
had the children become
D.
do the children become
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