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单选题
444.飞机在地面时,溢流活门处于什么位置( )The aircraft is on the ground, the overboard valve position is( )
A
全关Full closed
B
全开Full open
C
半开 Partial opening
答案解析
正确答案：B
解析：
题目解析
飞机在地面时，溢流活门处于什么位置( ) The aircraft is on the ground, the overboard valve position is( )
答案:B
解析：答案B是正确的。在飞机停在地面上时，溢流活门通常是全开（Full open）状态。这有助于排放无需在机上循环的空气，以保持机舱内的适宜环境条件。
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