感度试验要求全列车按规定充风后两风钟内缓解完毕。
参考答案：错
He also thinks that _____ English movies isn't a bad way because he can _____ the actors say the words. [ ]
A. watch; watches
B. watching; watch
C. watched; watching
D. watches; to watch
国家秘密的密级分为（）。
A.绝密、机密二级
B.绝密、机密、秘密、超绝密四级
C.绝密、机密、秘密三级
