在通往机房和滑轮间的门或活板门的外侧应设有包括下列简短字句的须知：“电梯驱动主机——危险未经许可禁止入内”（）
参考答案：对
— I've just heard about that the lecture given by Guo Feng. a young doctor . was cancelled .
— Oh. no! _______. [ ]
A. It's wonderful
B. It doesn't matter
C. I have no idea
D. I was looking forward to that
脑震荡（）
A.伤后无昏迷，3h后意识障碍
B.伤后啼哭，抽搐
C.伤后立即昏迷，伴去脑强直发作
D.伤后昏迷，片刻后清醒
E.伤后浅昏迷，脑脊液呈血性
esn'
t matter