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单选题
如果没有安装门测试止动器或胶带纸，在功能测试期间，PSU氧气盒门将打开，氧气面罩将从氧气盒内掉出。
A
During the system test, the PSU nitrogen mask doors will open and the nitrogen masks will appear in the nitrogen box if the door test stop or the tapes are not installed.
B
If the door test stop or the masking tape is not installed, the doors of the PSU oxygen box will open and the oxygen mask will remain in the original position.
C
The PSU oxygen box doors will open and the oxygen masks will go out of the oxygen boxes during the functional test if you do not install the door test stop or the masking tape.
答案解析
正确答案：C
相关知识点：
门测试止动器胶带与氧气盒
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