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  3. What is the most important service of trees to man according to the passage? Why do forests in many parts of the world slowly d

What is the most important service of trees to man according to the passage? Why do forests in many parts of the world slowly d

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问题 What is the most important service of trees to man according to the passage?
Why do forests in many parts of the world slowly disappear?
选项 A、New trees are not looked after properly.
B、Many trees have been cut down by man.
C、Man has not paid enough attention to planting trees.
D、All of the above.
答案D
解析 本题考查的是考生对细节的把握。答案对应文章的第二段，其中提到人类大量砍伐树木，马马虎虎地种树，不细心照顾树木，这些都是导致森林消失的原因。因此选择D，其他三项都是对的。
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