在将患者搬运至平车时,护士肘部支于床面,前臂用力,抬起患者,根据力学原理,这是利用了()
A.平衡杠杆
B.省力杠杆
C.速度杠杆
D.增加反作用力
正确答案是C
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上一篇:设1,These days, the U.S. economy isn’t ‘graduating enough scientists to fill the need of the coming decades,’ frets Charles C. Leighton, ‘That’s a real concern’.
设1,These days, the U.S. economy isn’t ‘graduating enough scientists to fill the need of the coming decades,’ frets Charles C. Leighton, ‘That’s a real concern’.