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  3. PASSAGE FOUR What can microorganisms be divided into according to the passage?

PASSAGE FOUR What can microorganisms be divided into according to the passage?

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问题 PASSAGE FOUR
What can microorganisms be divided into according to the passage?
选项
答案Beneficial ones and nasty ones.
解析 第1段提到，对人体有益的细菌的数量远远大于有害细菌的数量，由此可知，细菌可以分为有益菌和有害菌，故答案为Beneficial ones and nasty ones。
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