According to the passage, sea-water can be turned into fresh water by
A: heating it up.
B: treating it with chemicals.
C: taking salt out of it.
D: drying it up.
A: heating it up.
B: treating it with chemicals.
C: taking salt out of it.
D: drying it up.
举一反三
- It may be inferred from the passage that ______. A: bacteria can be most easily killed by removal of moisture B: drying out a house will eliminate the risk of airborne infection C: hot-air heating is better than steam heating because steam heating uses water D: none of the above
- At the policeman's signal, the vehicle pulled up. A: stopped B: slowed down C: sped up D: turned up
- Of all the reserves of fresh water in the world, about three-fourths is ______. A: consumed by glaciers and polar ice B: in solid form C: out of the reach of present technology D: converted into sea water annually
- Water supplies are cut A: because the channels are broken B: because of the high temperature C: because wells are drying up D: because of the rain
- 7.Which of the following points is NOT INCLUDED in the passage? A: In dustrial development incudes the simplification of complex chemical processes B: Diluting wastes needs certain amount of water C: Demands for water will go up along with the expanding population D: Intensive cultivation of land requires more and more chemicals