能与绵羊红细胞结合的CD分子是
A.CD3
B.CD2
C.CD4
D.CD28
E.CD8
参考答案:B
人体要完成一个简单的缩手反射可以由单个细胞来完成吗?
Jane’s mother preferred __________ TV at home to __________ to the concert.
A.to watch; go
B.watching; going
C.watching; go
D.to watch; going