单选题

There is not too much wear of the rollers or signs of grooves on the flap track.

AA. 滚轮上没有过多的磨损且襟翼轨道上没有腐蚀迹象。

BB. 滚轮上没有过多的磨损且襟翼轨道上没有划痕迹象。

CC. 滚轮上没有过多的磨损且襟翼轨道上没有凹痕迹象。

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正确答案：A （备注：此答案有误）

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