Chest compression shouldn't be applied unless ______. A.the victim is still unconscious after the airway clearance B.you cannot feel pulse after mouth-to-mouth breathing C.you have prepared yourself in advance to do it properly D.all of the above
A.A.the B.you C.you D.all
【参考答案】
C 解析：如何才能实施心脏复苏法。根据题干中的信息词Chest compression和applied定位到原文......