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单选题
当用千斤顶顶升飞机时，保持重心在限制范围内。
A
A.When you lift the aircraft on racks, keep the center of the aircraft between these limits.
B
B.When you lift the aircraft on jacks, keep the center of gravity between these limits.
C
C.When you lift the aircraft on jacks, the gravity of the aircraft shall be limited.
答案解析
正确答案：B
相关知识点：
顶升飞机重心考点牢
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