What is the unique system of underwater irrigation and drainage in Xinjiang Province?
举一反三
- Can natural rubber be used in irrigation and drainage hoses？
- Can natural rubber be used in irrigation and drainage hoses？ A: 正确 B: 错误
- The system for supplying water to farmers' fields is known as ______. ( A: articulation B: liquidation C: liquefaction D: irrigation
- The __________ system here, including a water-closet, is of the mostcomplete and modern kind. A: climate B: topographical C: water D: drainage
- Is the cat bow back a unique form of fire-wall in that province? A: Hunan B: Hubei C: Jiangxi D: Guangdong