单选题

True Airspeed is the airspeed of an airplane relative to undisturbed air which is the CAS corrected for altitude, temperature and compressibility.

A真实空速是飞机相对于未受扰动的空气的空速，是根据高度.温度和压缩性修正的CAS。

B真实空速是飞机相对于稳定的空气的空速，是根据姿态.温度和膨胀性修正的CAS。

C真实空速是飞机相对于未受扰动的空气的空速，是根据高度.温度和调节性修正的CAS。

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正确答案：A （备注：此答案有误）

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