M: It's too bad you didn't make it. The professor was looking for you all morning.
Q: What happened to the woman?
(15)
A.She had a bad cold.
B.She had a car accident.
C.She got home before 10 o'clock.
D.She was delayed.
第3题
煤气设备均必须保持正压操作,在设备停止生产而保压又有困难时,则应可靠地(),并将内部煤气吹净。
A.放散
B.切断煤气来源
C.关闭
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