初步诊断应考虑为
A．肾结核
B．肾肿瘤
C．先天性后 * * 瓣膜
D．先天性肾盂-输尿管连接部狭窄
E．右侧输尿管结石
参考答案：D
–What’s the noise ? It sounds as if it comes from upstairs.
--______. It must be the window-cleaner working , next door.
A．I’m not sure
B．I hope not
C．I’d rather not
D．I don’t think so
