肾动脉狭窄最常见的原因为（）
A.大动脉炎
B.动脉粥样硬化
C.动脉壁纤维肌肉增生
D.先天性肾动脉发育不良
E.神经纤维瘤病
参考答案：A
请选出下面词语中的错别字并改正。
周道如坻 贮立 顶礼 膜拜 恻隐 猝不及防 沉缅
— ____ in this street? — I think Mr. Black is the richest man.
A．Whom do you think is the richest man
B．Who do you think is the richest man
C．Do you think who is the richest man
D．Do you think whom is the richest man
