第16题: [单项选择]Questions 11 -13 are based on the following dialogue between two students talking about their lecture.What habit has the woman recently had A. Telling jokes. B. Falling asleep in classes. C. Staying later after classes. D. Eating in the cafeteria. 参考答案:C 答案解析:[听力原文]11-13 M: Hi, Susan, where were you at lunch time I was saving a seat for you in the cafete
第25题: [单项选择]传染源是指 A. 病原体已在体内繁殖并能将其排出体外的人和动物 B. 被病原体污染的食物和水 C. 带有病原体的血液、体液和血制品 D. 带有病原体的节肢动物 E. 被病原体污染的土壤 参考答案:A 答案解析:[解题思路] 传染源是指病原体已在体内生长繁殖并能将其排出体外的人和动物,包括患者、隐性感染者、病原携带者和受感染的动物。 [命题规律] 考查“传染源”。必须掌握。