The hotel in the town wasn’t particularly good, but I      in many worse hotels.

A．was staying

B．stayed

C．would stay

D．had stayed

一般来说，直升机结构中稳定性由强到弱的顺序是（）

A.刚性>铰接>半刚性

B.铰接>半刚性>刚性

C.刚性>半刚性>铰接

D.半刚性>铰接>刚性