What does the writer say about tap water? Which of the following is NOT correct? What does the last paragraph tell you?

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问题 What does the writer say about tap water? Which of the following is NOT correct?
What does the last paragraph tell you?

选项 A、The new technique can tell precisely where a person lives.
B、Water supplied indifferent regions all come from the same source.
C、Types of water used in different regions provide useful information for the police.
D、Hair samples provide the most important clues to identify crimes.

答案C

解析 选项A、B、D与原文均有出入。尽管在一个较大的范围内,人们使用成分较为相同的水,但是水的成分组成提供的信息可以帮助官方缩小破案线索范围。
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