_______ for the excellent work he has done in education, Mr Bright is going to give us a talk this

Wednesday night. [ ]

A. known    

B. having known    

C. has been known    

D. is known

急进性肾炎的病理特点是（）。

A.系膜和基质增生，形成毛细血管襻的双轨现象

B.弥漫增殖性病变

C.系膜增殖性病变

D.局灶节段性硬化

E.广泛肾小球囊腔内新月体形成