狼疮肾炎肾组织活动性病变有（）
A.肾小球硬化
B.透明质酸
C.细胞增生
D.细胞浸润
E.纤维性新月体
参考答案：B, C, D
— What’s the main purpose of tonight’s meeting?
— We are going to talk about the problem _______ at the last meeting.
A．having discussed
B．to be discussed
C．being discussed
D．discussed
23·83=2n，则n=（ ）。
