drainage
举一反三
- Can natural rubber be used in irrigation and drainage hoses？
- The Missouri drainage area covers one-sixth of the entire United States.
- What is the unique system of underwater irrigation and drainage in Xinjiang Province?
- Can natural rubber be used in irrigation and drainage hoses？ A: 正确 B: 错误
- The __________ system here, including a water-closet, is of the mostcomplete and modern kind. A: climate B: topographical C: water D: drainage