多普勒发明的
用来观察组织结构的
测量血流速度
体外冲击波碎石术
traveling wave theory
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电击(electric shock)
沙波(sand wave)
波基面(wave base)
为了避免震动,用低速控制钮减低移动舱盖的速度。()A、To avoid shock, reduce the speed of moving hatch cover by inching control.B、To avoid shock, reduce the speed of moving hatch cover by control levers.C、To avoid shock, reduce the position of moving hatch cover by inching control.D、To avoid shock, reduce the course of moving hatch cover by control levers.
体外循环(extracorporeal circulation)
休克(shock)