以免疫黏附作用清除免疫复合物的补体活性片段是（）
A.C3a
B.C2a
C.C3b
D.C5b
E.C1q
参考答案：C
用所给单词的适当形式填空.
1. Where _____ Jim _____ (buy) the computer?
2. Beijing is a _____ (center) city of China.
3. The story is _____ (real) interesting?
4. Do they want _____ (go) to the mountains?
5. We _____ (go) _____ (camp) in the mountains last summer vacation.
“新亚欧大陆桥”的主要路线是？
