单项选择题
A.2L/2R/4L/4R B.1L/1R/3L/3R C.1L/1R/4L/4R D.2L/2R/3L/3R
A.6 B.8 C.10 D.12
A.在驾驶舱 B.头顶乘务员休息室、客舱内 C.CAP屏幕上 D.全部都对