AMU位于（）.
A.前电子舱
B.后电子舱
C.客舱前厨房顶板上
D.客舱后厨房顶板上
参考答案：B
When ________ what made him a popular person, he said it was his personality.
A．asking
B．asked
C．being asked
D．ask
起重机采用裸滑线时，应与煤气、乙炔气管道保持不小于（）m的安全距离。
A、3
B、5
C、4
