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单选题
The flight controls are divided into primary flight controls which control the aircraft around the three axes and secondary flight controls.
A
The flight controls are divided into primary flight controls and secondary flight controls, the primary flight controls control the aircraft around the three axes.
B
The flight controls are divided into primary flight controls and secondary flight controls, these controls control the aircraft around the three axes.
C
The flight controls control the aircraft around the three axes, while the primary flight controls control the secondary flight controls.
答案解析
正确答案：A
