试题与答案

据2003年9月6日某报载:铅中毒可以引起身体各个器官的损害,但最重要的是引起脑和心

题型:单项选择题

题目:

据2003年9月6日某报载:铅中毒可以引起身体各个器官的损害,但最重要的是引起脑和心理行为的发育障碍,脑发育障碍主要是智力发育低下。美国学者共跟踪调查了276名美国新生婴儿。在这些婴儿6个月、1岁、1岁半、2岁、4岁的时候,分别测量其血铅水平,然后在5岁时,用统一方法测量这些婴儿的智商。研究人员发现,婴儿血液中含铅水平与其智商呈反比关系。平均而言,婴儿血液中每升增 100毫克铅,其智商就会下降6~7个点。

铅中毒最重要的是引起()的发育障碍。

A.脑

B.嘴

C.心理行为

D.肠

答案:

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