单选题

IF THE ROTORS STOP SUDDENLY, EXAMINE THE INTAKE FOR UNWANTED MATERIAL.

AA. 如果襟翼突然停止，检查进气口是否有异物。

BB. 如果副翼突然停止，检查排气口是否有不必要的材料。

CC. 如果旋翼突然停止，检查进气口是否有不必要的材料。

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正确答案：A （备注：此答案有误）

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