单选题When administering artificial respiration to an adult, the breathing cycle should be repeated about （）A12 to 15 times per minuteB18 to 20 times per minuteC20 to 25 times per minuteDas fast as possible
单选题
When administering artificial respiration to an adult, the breathing cycle should be repeated about （）
A
12 to 15 times per minute
B
18 to 20 times per minute
C
20 to 25 times per minute
D
as fast as possible
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单选题Sign(s) of respiratory arrest requiring artificial respiration is(are)（）.AvomitingBblue color and lack of breathingCirregular breathingDunconsciousness
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单选题Changing rescuers while carrying out artificial respiration should be done（）.Awithout losing the rhythm of respirationBonly with the help of two other peopleCby not stopping the respiration for more than 5 minutesDat ten-minute intervals
名词解释题厌氧呼吸（anaerobic respiration）