梨状肌综合征与腰椎间盘突出症的主要鉴别点是（）
A.坐骨神经痛
B.下肢肌萎缩
C.足部感觉异常
D.臀部压痛点
E.腰部症状
参考答案：E
皮质性白内障初发期晶状体皮质内出现( )、( )和( )。
The agency, （） to set and enforce health standard for American workers, has been promising a cotton dust standard for several years.
A. which is
B. which it is
C. whose job it is
D. of whose job is
