下图为屈肘时的状态，①②分别为两组肌肉，下列说法正确的是
A．①收缩，②舒张
B．①收缩，②收缩
C．①舒张，②收缩
D．①舒张，②舒张
答案：A
A: Have you a single room with bath for tonight and tomorrow nightB: ().
A. Yes. The rooms have been sold out.
B. No. Just a moment, please.
C. Yes, our rooms are very good.
D. Sorry, we haven’t any singles left, I’m afraid.
下列哪些情况使用的特种设备安全的监督管理不适用本法。（）①军事装备②核设施③航空航天器④游乐设施
A.①②③
B.②③④
C.①③④
D.①②③④
