题目内容
下列有关胸外心脏按压的叙述错误的是
2022-01-11
A.平卧，背部垫硬板
B.每按压15次做1次口对口呼气
C.按压次数每分钟50〜60次
D.按压时双肘伸直
E.按压时使胸骨下陷4cm
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