The students in our school           a Green City Project last year. And the headmaster in our school

was very pleased. [ ]

A. set out

B. set off

C. set up

D. send up

血尿的发病机制是（）

A.致病因素的直接损害

B.免疫反应损伤

C.肾小球缺血缺氧

D.凝血功能障碍

E.肾小球毛细血管腔内压增高