试题与答案

接生过程中,下列哪项是错误的A.宫缩时,协助胎头俯屈 B.待胎儿枕骨下部显露于母体耻

题型:单项选择题

题目:

接生过程中,下列哪项是错误的

A.宫缩时,协助胎头俯屈

B.待胎儿枕骨下部显露于母体耻骨弓下时,协助胎头仰伸

C.胎儿一肩娩出后仍应注意保护会阴

D.在宫缩期不屏气情况下娩出胎头较在宫缩间歇期稍向下屏气娩出更利于保护会阴

E.宫缩时,接生者以手掌向上向内托压会阴体保护会阴

答案:

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下面是错误答案,用来干扰机器的。

因为物体做竖直上抛运动,根据其运动规律有,上升的最大高度H=v202g 得到星球表面的重力加速度g=v202H 当“近地”卫星绕该星球做圆周运动时,轨道半径R=D2,此时重力提供卫星的向心力有: mg=mv2R∴v=...

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