问题
单项选择题
Fixed CO2 systems would not be used on crew’s quarters or（）.
A.the paint locker
B.spaces open to the atmosphere
C.cargo holds
D.the engine room
答案
参考答案：B
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Fixed CO2 systems would not be used on crew’s quarters or（）.
A.the paint locker
B.spaces open to the atmosphere
C.cargo holds
D.the engine room
参考答案：B