问题 单项选择题

食物中毒现场调查时,卫生医师很重视首发病例,原因是()。

A.其比别人敏感,预后不良,须加强防治

B.其具有较高的诊断价值

C.其对中毒原因能谈出更多情况

D.由其中毒潜伏期可推断中毒可疑餐次

E.其对周围人群影响较大

答案

参考答案:D

综合

读下面漫画结合所学知识完成下列要求:

(1)这幅漫画所反映的主题是什么?

                                                                                                                                                               

(2)这种做法对亚马孙河流域的热带雨林有哪些危害?

                                                                                                                                                                

(3)亚马孙河流域的热带雨林有哪些作用?

                                                                                                                                                                

(4)谈一谈你对开发和保护热带雨林的看法?

                                                                                                                                                                

单项选择题