A、To transport water to higher place. B、To transport vegetables quickly. C、To bring nutrients to the soil. D、To adjust the soil

admin2009-04-23  34

问题  
Did you know that vegetables can be tricked into growing in climates they are not accustomed to? Cool climate vegetables are now able to be grown in places as hot as Hawaii. In Hawaii, marine engineers have been able to actually convince such vegetables that they’re living in cooler climate. That way they grow faster and taste better. What these engineers have been using is very simply cold sea water. How do they use it? They place pipes hi the mil and the cold water flow in through them cools the air. This stimulates plants growth mid enables gardeners in tropical climates to glow crops from cooler climates. Also some of these pipes m exposed to the air and they con dense moisture and thus litigate the garden. What’s especially appealing about this process is that nothing damaging to the natural environment is being used. Another innovative use for cold ocean water is to cool buildings. Engineers believe that, for example, the entire west coast of the United Stales could be air-conditioned using sea water.

选项 A、To transport water to higher place.
B、To transport vegetables quickly.
C、To bring nutrients to the soil.
D、To adjust the soil temperature.

答案D

解析 Why have the engineers used pipes in Hawaii?
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