2. 外语
  3. A industrially polluted soils B rock and soil chemistry C naturally polluted soils D the pathways of metals into the food chain

A industrially polluted soils B rock and soil chemistry C naturally polluted soils D the pathways of metals into the food chain

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问题 A industrially polluted soils
B rock and soil chemistry
C naturally polluted soils
D the pathways of metals into the food chain
E the element of iodine
F the persistence of heavy metals
It is extremely necessary to study the long-term effects caused by living on______.
选项
答案C
解析 本题答案的依据是最后一段的第一句，即“There is a vital need to understand the potential risks and long—term health effects of living on naturally contaminated soils．”
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