第20题: [单项选择]Questions 11 to 18 are based on the conversation you have just heard. A. At 5:00. B. At 5:30. C. At 4:30. D. At 4:00. 参考答案:C 答案解析:[听力原文] W: It’s five o’clock already and I haven’t finished typing this report. M: Don’t worry.
第26题: [单项选择]患者,男,70岁。尿频、尿流缓慢、排尿困难3年。选择前列腺癌的肿瘤标志(). A. AFP B. CEA C. CA25 D. CA153 E. PSA 参考答案:E 答案解析:血清CEA浓度升高,尤其>20μg/L时常提示患有恶性肿瘤,如肠癌、肺癌、胰腺癌、卵巢癌、子宫癌等。首次治疗成功后,CEA水平下降至正常水平并持续稳定,CEA水平再次缓升提示癌的复发。PSA是诊断前列