单项选择题
A.开放静脉通道B.心电监测C.准备好除颤器D.准确有效心外按压
A.2次B.3次C.4次D.5次
A.1)(2)(3)(4)(5)(6) B.6)(2)(4)(3)(5)(1) C.6)(4)(2)(3)(5)(1) D.6)(2)(4)(5)(3)(1) E.6)(1)(2)(3)(4)(5)