单选题：Paragraph 2__________.

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题目类型：单选题
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题目内容：

Paragraph 2__________. A．Ounces of Water Needed Per Day
B．Importance of Water
C．Composition of Water
D．Signs of Dehydration
E．Supply of Water
F．Necessity for Bringing a Bottle of Water with You

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答案解析：

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