使用苏生器自动肺时，应通过调减压器和配气阀旋钮，调节伤员呼吸频率，成人（）次/分。
参考答案：12-16
— Peter, come on. I need your hand!
— _____ [ ]
A. What hand, please?
B. Help! Help!
C. What's up?
D. What do you mean by saying this?
