具有免疫黏附作用的补体成分为()
A.C3b、C4b
B.C1q、C4
C.C3a、C5a
D.C3b、C5b
E.C4b、C5b
参考答案:A
—Do you mind if I sit here?
—___________. It’s for Miss. Wood.
A.Not at all
B.Never mind
C.You’d better not
D.Of course not
单项选择。
This is ______ computer. That's ______ computer. [ ]
A. I, he
B. he, I
C. his, my
D. him, my