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  3. Traditionally, garbage is thought to be ______. What is the main purpose of this passage?

Traditionally, garbage is thought to be ______. What is the main purpose of this passage?

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问题 Traditionally, garbage is thought to be ______.
What is the main purpose of this passage?
选项 A、To describe an experiment in which a Hydrapulper is used.
B、To introduce Hydrapulper, a new type of garbage disposer.
C、To tell what the writer thinks of the recycling of garbage.
D、To explain why garbage should be recycled in a new way.
答案B
解析 本题为主旨归纳题。文章第一段指出垃圾成山引起许多城市进行垃圾处理新方法试验。第二段作者开始介绍一种新的机械，介绍这种新的机械是如何工作的，它是如何将垃圾中无用的部分和有用的部分分开的。
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