造成RA关节破坏的主要病理基础是（）
A.浆细胞浸润
B.中性粒细胞浸润
C.滑膜细胞层下充血
D.淋巴细胞浸润
E.管翳形成
参考答案：E
It's nice of you to ______ so much time showing me around your school. [ ]
A. take
B. spend
C. cost
D. have
回答问题。
1. What is the date?
____________________________________________________________
2. Did Santa bring them gifts?
3. What's Li Ming's gift?
4. What gift did Li Ming give Mr. and Mrs. Smith?
