第4题: [单项选择]输尿管结石 A. 多为原发于输尿管的结石 B. 多为肾结石落入输尿管后不能下行所致 C. 多为膀胱结石逆行至输尿管所致 D. 多位输尿管创伤后血肿钙化所致 E. 多为输尿管结核的钙化灶所致 参考答案:B 答案解析:输尿管结石多为肾结石落入输尿管后不能下行所致。
第5题: [单项选择]Who is the woman [A] A doctor. [B] A nurse. [C] A teacher. 参考答案:A 答案解析:[听力原文] W: Take these pills three times a day. Two pills each time. M: Thank you. Q: Who is