2. 自考
  3. A. industrially polluted soils B. once they entered the food chain. C. naturally polluted soils D. the geology and geochemistry

A. industrially polluted soils B. once they entered the food chain. C. naturally polluted soils D. the geology and geochemistry

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问题 A. industrially polluted soils
B. once they entered the food chain.
C. naturally polluted soils
D. the geology and geochemistry of the environments
E. the element of iodine
F. not found so far
Heavy metals would be a health concern ______.
选项
答案B
解析 本句应定位在第四段中“Industrially polluted sites usually undergo intensive clean—upand rehabilitation because heavy metals are a health concern once they enter the food chain．”由此可以看出，由于工业污染所带来的危害之大，所产生的重金属一旦进入人类的食物链中，很可能会对人类健康造成影响。
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