2. 考研
  3. A.like B.through C.consists of A.what substances your tap water【T1】______ B.while the water streams【T2】______pipelines C.【T3

A.like B.through C.consists of A.what substances your tap water【T1】______ B.while the water streams【T2】______pipelines C.【T3

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问题 A.like   B.through   C.consists of
A.what substances your tap water【T1】______
B.while the water streams【T2】______pipelines
C.【T3】______every other substance
    Drinking water,【T4】______, contains small amounts of bacteria. Most of these bacteria are common ones and they are generally not harmful. Chlorine (氯) is usually added to drinking water to prevent bacterial growth【T5】______This is why drinking water also contains small amount of chlorine.
    Water mostly consists of minerals and other inorganic compounds, such as calcium. If you want to find out【T6】______and whether it is totally safe to drink, you can have a specialized agency check it out for you.
【T2】
选项
答案B
解析 while the water streams pipeline是一个while引导的分句，streams做谓语动词，含义是“流动”，pipeline“管道”，因此填人介词through(通过)最符合语义和语法的要求。
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