637.在( )时,旅客氧气面罩可以放下 What condition can make pasenger oxygen mask fall down

　按下人工释放按钮 Press manual release pushbutton

　座舱高度大于14000英尺 cabin altitude is higher than 14 000 ft.

　A和B以上都对 A and B are both right.

正确答案：C

解析：

题目解析答案:C 解析：在飞机座舱高度大于14000英尺且需要氧气面罩时，旅客氧气面罩会自动放下。所以，选项B是正确的。然而，如果需要手动释放旅客氧气面罩，可以按下人工释放按钮。因此，选项A也是正确的。因此，A和B都是正确的，所以答案是C。

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A330机型熟悉课程试题

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