The best irrigation water is river water, pond water and lake water
A: 正确
B: 错误
A: 正确
B: 错误
举一反三
- A high negative ion count is likely to be found _______. A: near a pond with a water pump B: close to a slow-flowing river C: high in some barren mountains D: by a rotation water sprinkler
- Many people don't realize that Lake Superior, _____, is in both the United States and Canada. A: which it is the largest fresh water lake in the world B: in the world of which it is the largest fresh water lake C: of which the largest fresh water lake is in the world D: which is the largest fresh water lake in the world
- The water in the river is as _____ as that in the lake.
- Which of the following is NOT part of the hydrologic cycle? A: water moving into creeks and streams following a rainstorm B: water infiltrating into the soil and bedrock C: calcium carbonate dissolving in soil water and groundwater D: water evaporating from a lake
- The chief causes of water shortage are ______. A: irrigation systems. B: massive dams. C: growth of planting. D: population growth and water pollution