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心肺复苏心脏按压时,按压与放松时间之比应为

单选题
2021-07-17 21:53
A、70% : 30%
B、60% : 40%
C、50% : 50%
D、40% : 60%
E、30% : 70%
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正确答案
C

试题解析

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