Nowadays teenagers like to go to fast food restaurants, _________, as the name says, eating doesn’t take much time.

A．which

B．who

C．where

D．that

肾血管平滑肌脂肪瘤的影像征象包括（）

A.肾实质内空洞形成

B.病灶CT值可为负值

C.肾盏边缘不整齐如虫蚀

D.输尿管扩张

E.增强明显均匀强化