单选题：Paragraph 6__________

题目分类：理工类
题目类型：单选题
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题目内容：

Paragraph 6__________ A．No evidence to indicate bad effects of naturally contaminated soil
B．Potential hazards of human contaminated soils
C．Research on channels of heavy metals getting into human food chain
D．Geology and health problems
E．Rocks-the ultimate source of soil pollution
F．Long-term health effects on children

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答案解析：

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63

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