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单选题
WHEN TESTING THE OXYGEN SYSTEM AT EACH COCKPIT CREW STATION, YOU ARE VERIFYING:
A
That there is no overpressure in the mask supply line.
B
That the regulator and the inflatable harness are leak tight and that the oxygen flow is correct.
C
That the air/oxygen mixture is correct.
答案解析
正确答案：B
题目纠错
