The chief causes of water shortage are ______.
A: irrigation systems.
B: massive dams.
C: growth of planting.
D: population growth and water pollution
A: irrigation systems.
B: massive dams.
C: growth of planting.
D: population growth and water pollution
举一反三
- The chief causes of water shortage are population growth and water pollution.
- We must do away with the water pollution ______ with the growth offish. A: interferes B: interfering C: C. interfered D: D. being interfered
- The best irrigation water is river water, pond water and lake water A: 正确 B: 错误
- During the period of _____, rain fall is important to the growth of crops. A: Rain Water B: Grain Rain
- Which of the following is not a result of Industrializing agriculture (or, “chemicalization” of agriculture) A: Water shortage B: Land pollution C: Financial failure D: Soil erosion