阅读理解训练题(二十九)
(A)
Wind—even the slightest of winds can prevent frost (霜冻).That’s because wind is like a spoon in your cup of tea: it stirs (搅起)things down and brings down a lot of warm air that often floats just above housetops and trees .
It may seem strange , but ice itself sometimes can protect crops from frost . Some growers actually spray their crops with water on a freezing night . Water freezes quickly on plants and then a strange thing happens . As long as ice stays wet , it can’t get colder than 32癋h, a temperaure many plants can stand . By continual spraying water on the ice , the growers keep it from going below 32 degrees even if the air is
much colder . This may defeat frost and saves plants .
This strange kind of “ice blanket” works only on plants that are strong enough to stand the weight of frozen spray . This is used even to protect banana plants on some Central American farms .
56.If the ice became entirely frozen and dry , suppose what might happen .
A.The plants might be frozen to death .
B.The plants might benefit from it .
C.It might save the plants .
D.It might make the plants grow slowly .
57.Ice can save plants rather than destroy them on condition that they are
A.sprayed regularly
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