题目内容
（请给出正确答案）
[主观题]
It's important to have vapor seals on the warm side to ______.A．avoid gas when the air coo
It's important to have vapor seals on the warm side to ______.
A．avoid gas when the air cools
B．avoid mist when the air cools
C．avoid rapor when the air cools
D．avoid moisture when the air cools
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