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What is the most important service of trees to man according to the passage? What’s the main idea of the passage?

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问题 What is the most important service of trees to man according to the passage?
What’s the main idea of the passage?
选项 A、. How to plant new trees.
B、The relationship between trees and man.
C、How trees help prevent droughts and floods.
D、How to stop rain washing away soil.
答案B
解析 整篇文章所说的一切都是在表明树木和人类的关系。
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本试题收录于： 大学英语三级B级题库大学英语三级分类
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