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单选题
那些制造商对飞机及其系统和部件的检查、维护和大修的时间限制给出建议，也酌情给出零部件的使用寿命。
A
For inspections, repair and overhaul of the aircraft and its systems and units, those producers recommended time limits and life of parts if possible.
B
Those manufacturers recommended time limits for inspections, maintenance and overhaul of the aircraft, its systems and units, and life of parts, as applicable.
C
Those manufacturers gave time restrictions to inspect, repair and maintenance the aircraft, its systems and units, and according to the situation they gave the life of parts .
答案解析
正确答案：B
相关知识点：
制造商建议飞机检查等时限
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