词汇与结构
Warm air is less dense than cool air, and _____ air is less dense than dry air.
Warm air is less dense than cool air, and _____ air is less dense than dry air.
moist
举一反三
- The air is less dense on a hot humid day than a cool dry day.
- A light(轻的) gas, such as hydrogen(氢), is much less dense(稠的) than air is at the same pressure.
- The pressure of pilot air is usually （） than that of starting air.
- The air leakage of tubular air preheater is larger than that of rotary air preheater (). A: Right B: Wrong
- The freight rate of air express is much higher than that of other air transportation mode.
内容
- 0
Noise pollution generally receives less attention than ______ air pollution. A: does B: it does C: receives D: it does over
- 1
Where warm air replaces cold air it is called a .
- 2
Where cold air replaces warm air, it is called a .
- 3
There is far less traffic on the road and the air is much _______(fresh)
- 4
The freight rate of air express is much higher than that of other air transportation mode. A: 正确 B: 错误