题目内容
口对口人工呼吸的操作中，下列说法错误的是
2021-09-17
A.头后仰，托起下颌
B.吹气时要看到胸廓抬起
C.吹气次数不少于20次/分
D.吹气时可向后压环状软骨
E.吹气时捏闭鼻孔
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