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单选题
如果必须把飞机停在斜坡上，确保轮档放置在轮子前面。
A
The wheel chocks must be put forward of the wheels while the aircraft is on the ramp.
B
If the aircraft must be parked on the apron, put the wooden blocks in front of the wheels.
C
If you must park the aircraft on a slope, make sure that wheel chocks are in front of the wheels.
答案解析
正确答案：C
相关知识点：
飞机停斜坡，轮档放轮前
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