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
Geologists are indispensable in the research project on geology and health due to their knowledge on______.
选项
答案B
解析 全文都在论述重金属的摄入可能会对人体健康产生有害影响。最后一段说到地质学家在解决调查这个问题能起到的作用。这个句子是：“Geologists should be part ofsuch studies as they can provide the essential background information on rock and soil chemistry as well as the chemical forms of heavy metal pollution．”
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