A light(轻的) gas, such as hydrogen(氢), is much less dense(稠的) than air is at the same pressure.
举一反三
- 词汇与结构 Warm air is less dense than cool air, and _____ air is less dense than dry air.
- The air is less dense on a hot humid day than a cool dry day.
- Sunlight seems to ______ than the light of the moon. A: have to travel a greater distance B: move less quickly C: travel much quickly D: be less powerfull
- The pressure of pilot air is usually （） than that of starting air.
- The black workers are paid _____ than white workers doing the same kind of work. A: very little B: very few C: much less D: much fewer