静脉肾盂造影时（）首先显影
A.肾实质
B.肾小盏
C.肾大盏
D.肾盂
E.输尿管
参考答案：A
-What's this?
-____________________ [ ]
A. It's a book.
B. Yes,it is.
C. No,it isn't.
肉豆蔻
