A
Did you know that vegetables can grow in the climates they are not used to?Cool climate vegetables like asparagus (芦笋)are now able to be grown in places as hot as Hawaii.In Hawaii,marine (海的)engineers have been able to actually let you believe such vegetables are living in hotter climates.In that way they grow faster and taste better.What these engineers have been using is simply cold sea water.How did they use it?They place pipes in the soil and cold water flowing through them cools the earth.This causes plant growth and enables gardeners in tropical climates to grow crops from cooler climates.Also some of these pipes are exposed to the air and they make the air “wet” and thus water the gardens.What especially makes people happy about this process is that nothing bad to the natural conditions is being used.Another new use of cold ocean water is to cool buildings.Engineers believe that the entire west coast of the United States could be air-conditioned using sea water.
21What does the new system enable the gardeners to do?
A.Water the field with sea water.
B.Grow asparagus in hot places.
C.Grow cool climate vegetables in hot areas.
D.Cool the soil.
答案:C
解析:细节理解题。从“Coolclimatevegetables...arenowabletobegrowninplacesashotasHawaii.”可知应选C项。
22Sea water mentioned in the passage is mainly used to .
A.water the farms B.water the gardens
C.cool the air D.make the earth cool
答案:D
解析:细节理解题。从“Theyplacepipesinthesoilandcoldwaterflowingthroughthemcoolstheearth.”可知。
23What is the report mainly about?
A.How to grow vegetables in hot areas.
B.How to grow crops in tropical climates.
C.How to cool the soil.
D.How to use sea water.
答案:D
解析:主旨大意题。由文中“Whattheseengineershavebeenusingissimplycoldseawater.Howdidtheyuseit?”可知。
24It can be inferred from the passage that .
A.sea water can act as an air-conditioner
B.asparagus is only grown in hot places
C.the writer wants to tell us something about scientific advance
D.sea water has many advantages
答案:C
解析:推理判断题。A、D两项为作者文中明确提出的正确观点,B项文章中明确表明asparagus可在夏威夷那么热的地方种植,故A、B、D三项均被排除。
