单选题

The minimum jack closed height must be less than the distance between the fitting and the ground when the aircraft is on its wheels.

A当飞机离地时，最小的千斤项的高度必须小于接头和地面之间的距离。

B给飞机安装轮子时，千斤顶的最低闭合高度不能超过顶块和地面之间的距离。

C在顶起飞机之前，最小的顶升高度必须小于顶块和地面之间的距离。

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正确答案：A （备注：此答案有误）

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