( ) were necessary to carry water to outlying farms and villages as well as to maintain even saturation of crops near the river.
A: irrigation canals
B: rivers
C: caves
D: lakes
A: irrigation canals
B: rivers
C: caves
D: lakes
举一反三
- Watertransportoccursoninlandwaterways，suchas（），andoceans. A: rivers B: lakes C: canals D: land
- The best irrigation water is river water, pond water and lake water A: 正确 B: 错误
- ___ waste water was put into the rivers, and lakes which were badly polluted. A: At one time B: At a time C: One time D: A time
- Which of the following descriptions of the Mississippi River is NOT true A: It flows into the Great Lakes and St Lawrence. B: It is the biggest river system in the US. C: It flows down to New Orleans and the Gulf of Mexico. D: Ohio and Missouri Rivers are branches of the Mississippi River.
- whichof the following is not the source of surface water? A: rivers B: ice C: reservoirs D: lakes