单选题
1.[完成句子]The importance of particular metals in the human diet has been realized within the past few decades,and the idea that geology might be related to health has been recognized for a number of elements such as iodine,zinc and selenium. For example,soils with low iodine contents produce crops,and animals deficient in iodine. A lack of iodine in the human diet leads to some serious diseases.
Some serious diseases is connected with deficiency of __________.
A.industrially polluted soils
B.the element of iodine
C.rock and soil chemistry
D.the persistence of heavy metals
正确答案:B
答案解析:通过关键词Some serious diseases,可将题目定位于最后一句话:A lack of iodine in the human diet leads to some serious diseases. deficiency of和lack of表达同样的意思“缺乏、缺少”,因此根据这句话可以判断答案为B。