单项选择题

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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单项选择题
What’s the shortcoming of the small individual air conditioners
A．It’s too cold for people to adapt themselves to the temperature.
B．The temperature of the rooms is uncomfortable.
C．The temperature of the rooms is quite uneven.
D．It’s difficult to install them in the rooms.
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