系统的目标决定了系统的组织，而( )是目标能否实现的决定性因素。
A．系统B．组织C．管理D．控制
参考答案：B
—It's time to go to bed, Li Ping.
—Mum, I have a lot of homework to do, I won't go to bed ________ I finish it. [ ]
A. until
B. since
C. as soon as
D. after
以下哪一种是引起儿童继发性肾病综合征的常见原因（）
A.微小病变肾病
B.过敏性紫癜肾炎
C.肾静脉血栓
D.糖尿病肾病
E.狼疮性肾炎
