第24题: [单项选择]Questions 11 to 18 are based on the conversation you have just heard. A. She doubts he makes much money now. B. She’s surprised that he chose that company. C. She doesn’t know when her. classes started. D. She wonders why he’s kept his job. 参考答案:D 答案解析:[听力原文] M: Carl earned a lot of money over the summer vacation as a consultant to that company.
第26题: [单项选择]关于SARS的检测方法描述,不正确的是() A. ELISA可检测SARS病人血清中的抗体 B. 用ELISA法检测时,使用发病14天后的血清标本所得结果比较可靠 C. IFA可作为血清SARS-CoV抗体检测方法 D. 可用RT-PCR检测特异的SARS-CoVRNA片段,但阴性结果不能排除感染 E. 利用Vero细胞可分离SARS-CoV,但阴性结果不能排除感染 参考答案:B 答案解析:用ELISA法检测时,使用发病21天后的血清标本所得结果比较可靠,而不是发病14天的血清标本。