以下国家中属不于八国联军成员的是()
A.英国
B.瑞典
C.意大利
D.荷兰
参考答案:B, D
Your school things should _____.
A.be looked after well
B.be looked well after
C.be taken good care
D.be taken care of well
A.滑动摩擦力对工件做的功为
B.工件机械能的增加量为
C.工件相对于传送带滑动的路程为
D.传送带对工件做的功为0