胸外挤压术按压的部位是胸骨（）。
A、中下1/3交界处
B、1/2处
C、中下1/4
参考答案：A
并体循环
I didn’t mean to hurt you．What I meant was that you ______ have spoken to him like that.
A．shouldn’t
B．mustn’t
C．wouldn’t
D．couldn’t
