单选题

The second mode of pressurization control is the constant differential mode, which controls cabin pressure to maintain a constant pressure difference between the air pressure inside the cabin and the ambient air pressure, regardless of aircraft altitude changes.

A 增压控制的第二种方式是定差模式，它控制客舱压力，无论飞机的高度如何变化，保持客舱内气压与环境气压之间恒定的压差；

B 增压控制的第二种方式是变差模式，它控制客舱压力，使客舱内气压与环境气压之间保持恒定的压差，无论飞机的高度如何变化；

C 增压控制的第二种方式是定差模式，它控制客舱压力，飞机随着飞行高度的变化，保持客舱内气压与环境气压之间变化的压差；

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正确答案：A （备注：此答案有误）

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