填空题 A. industrially polluted soils
B. rock and soil chemistry
C. naturally polluted soils
D. the pathways of metals into the food
E. the element of iodine
F. the persistence of heavy metals

填空题 Some diseases are connected with deficiency of______.

填空题 It is extremely necessary to study the long-term effects caused by living on______.

填空题 Geologists are indispensable in the research project on geology and health due to their knowledge on______.

填空题 Industrially contaminated sites usually require a thorough clean-up due to______.