以下为多囊肾的辅助诊断依据的是（）
A.肾功不全
B.孤立性肝囊肿
C.颅内动脉瘤
D.尿路感染
E.以上都不是
参考答案：C
There _______ a lot of trees here, but now it has become desert. [ ]
A. is
B. are
C. used to be
D. used to being
养阴而不滋腻恋邪，常用治阴虚兼外感风热的药物是
A．枸杞子
B．百合
C．北沙参
D．玉竹
E．石斛
