应急出口的滑梯充气瓶在什么地方（）
A.在起落架舱
B.在电子舱
C.在客舱
D.在货舱
参考答案：D
— Why not go out and do some outdoor activities?
— That's a good idea. Maybe I need _____. [ ]
A. a stamp
B. a change
C. a book
分梳辊可分为哪两种类型？
