Americans won’t pay for drugs for themselves if they have their health insurance.
预防乙型及丙型肝炎，重点在于( )
A. 做好饮水消毒
B. 避免接触病人及病原携带者的血液及体液
C. 注射乙肝疫苗
D. 养成良好的卫生习惯
E. 以上均是
Questions 11 to 18 are based on the conversation you have just heard.
A. They should put the meeting to un end.
B. They should hold another meeting to discuss the matter.
C. She would like to discuss another item.
D. She wants to discuss the issue again later.
病原体侵犯或侵入机体，可在特定部位定植，可能在宿主细胞内仅有少量生长繁殖，故不排出体外称为( )
A. 隐性感染
B. 显性感染
C. 自限性感染
D. 一过性感染
E. 潜伏性感染
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