病理改变主要在肾脏，临床表现主要在膀胱的最常见于泌尿系疾病是
A．急性肾盂肾炎B．肾结石C．多囊肾D．泌尿系结核E．肾肿瘤
参考答案：D
- Do you remember the old man _____ a big dog?
- Yes. I was afraid of it when I passed his house.
A．used to having
B．used to have
C．was used to have
D．was used to having
一幅完整的DSA图像形成需经过哪些成像链
A．X线球管和X线能谱滤过器
B．滤光栅
C．影像增强管
D．电视摄像机和A/D转换器
E．光学系统
