触电急救时,当触电者心跳和呼吸均已停止时,应立即进行()急救,这是目前有效的急救方法。
A.仰卧压胸法;
B.俯卧压胸法;
C.举臂压胸法;
D.心肺复苏法。
参考答案:D
The lower bound on a European call price is the greater of zero and:()
A. the underlying price minus the exercise price.
B. the present value of the exercise price minus the underlying price.
C. the underlying price minus the present value of the exercise price.
你在接待处上班,临下班有个怒气冲冲的群众来找你,说你们单位业务科工作人员让他回去取材料,取回后又说还缺一份,还要回去取,但马上下班了,今天又是办理的最后一天,你怎么办