题目内容

CD3和CD4分子存在于

A. Treg和CTL细胞
B. Th1和Th2细胞
C. NK和B细胞
D. Tc细胞
E. 所有T细胞

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更多问题

HIV刺突蛋白gpl20受体是

A. CD2
B. CD3
CD4
D. CD8
E. CD25

Britons prefer to wait for the service to be offered, rather than ask for it.

A. 对
B. 错

When British people make offers, they do expect them to be accepted.

A. 对
B. 错

For an informal visit of one's home in the U.K., it is not polite to arrive too early.

A. 对
B. 错

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