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 helth effects on children
1.Paragraph 1
2.Paragraph 3
3.Paragraph 4
4.Paragraph 6
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
5.Some serious diseases is connected with deficiency of ……
6.It is extremely necessary to study the long-term effects caused by living on ……
7.Geologists are indispensable in the research project on geology and health due to their knowledge on……
8.Industrially contaminated sites usually require a thorough clean-up due to ……
答案：D A B C E C B F
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