问题 单项选择题

可以用来评价有害物质的来源、污染程度、分布情况和卫生技术措施效果的是( )。

A.个体采样

B.区域采样

C.综合采样

D.分布采样

答案

参考答案:B

判断题
材料题

阅读下列材料:有这样一句名言:“给我一个支点,我将撬动整个地球。”

请回答:

(1) 这是哪位历史名人的名言?他是哪国人?。

                                                                                                                                                           

(2)这位历史名人有哪些主要的科学成就和贡献?(两项即可)

                                                                                                                                                           

(3)怎样理解材料中的这句话?

                                                                                                                                                            

                                                                                                                                                            

(4)我们应向这位历史人物学习什么精神?