2. 外语
  3. Trees are city planners’ first line of defense in the【S1】______ against the urban heat-island effect, said Dale Quattrochi, a g

Trees are city planners’ first line of defense in the【S1】______ against the urban heat-island effect, said Dale Quattrochi, a g

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问题     Trees are city planners’ first line of defense in the【S1】______  against the urban heat-island effect, said Dale Quattrochi, a geographer with the NASA Marshall Space Flight Center in Huntsville, Alabama. But to be【S2】______, planners must select the right kinds of trees, such as oaks and maples, and plant them in the right places.
    Oaks and maples are big, leafy trees that provide shade, use the sun’s【S3】______  to grow, and give off water vapor that cools the air through evaporation, he explained. Other trees, such as pine and eucalyptus (桉树), naturally emit chemical compounds that【S4】______  to big-city problems, such as ground-level ozone and smog.
    To get the most【S5】______  from trees, Quattrochi said, planners should plant in areas that are currently devoid of vegetation, such as shopping mall parking lots and【S6】______  city streets. Also, planting trees on the south and west sides of a home or building will help keep the【S7】______cool during the hottest part of the day, he added, reducing cooling costs.
    According to the U. S. Environmental Protection Agency (EPA), more trees in cities can【S8】______  air quality, reduce carbon dioxide emissions,【S9】______  storm-water runoff, and improve community livability.
    "Everybody likes trees," Quattrochi said. "They add to the【S10】______  atmosphere of the city. I think urban planners look at planting trees now not only as, this is pretty, but, it’s effective, it’s cost effective."

A) interior         B) guide         C) improve         D) fight   
E) energy           F) rise          G) overall         H) contribute
I) press            J) damage        K) crowded         L) decrease
M) benefit          N) diverse       O) effective
【S2】
选项
答案O
解析 effective有效的。
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大学英语四级

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