人走路时，脚与地面之间的摩擦属于 摩擦；洗筷子时抹布和筷子之间的摩擦是__________摩擦；火车前进时，车厢车轮和钢轨之间的摩擦是 摩擦
静 滑动 滚动
-Is your mother a doctor in Qilu Clinic? –No!But she there for ten years.
A．worked
B．has been working
C．has worked
D．had worked
对被目击的短暂室颤患者的最佳处理措施为：
A、胸外按压
B、静脉推注利多卡因
C、静脉推注胺碘酮
D、立即除颤
