装卸货物时必须把门边处的哪两个锁扣打开?()
A:Y-LATCH;YZ-LATCH
B:XY-LATCH;XZ-LATCH
C:Y-LATCH;XZ-LATCH
D:YZ-LATCH;XY-LATCH
出自:民用航空器维修人员执照