人T细胞均具有的CD分子是()
A.CD2
B.CD3
C.CD4
D.CD8
E.CD16
参考答案:A, B
It's red and round. Its name begins with the letter " t ". It's the word _____________.[ ]
A. tea
B. tomato
C. banana
谈谈耙斗机使用中固定楔被拉出的原因及处理方法。