Which of the following molecules are involved in the formation of B cell coreceptor?
A. CD19
B. CD20
CD21
D. CD22
E. CD81
查看答案
Which of the following pairs of molecules provides the most important second signal for B cell activation?
A. CD28 on T cells and B7 on B cells
B. CD28 on B cells and B7 on T cells
CD40 on B cells and CD40L on T cells
D. CD40 on T cells and CD40L on B cells
E. LFA-1 on B cells and ICAM-1 on T cells
The membrane immunoglobulin expressed by mature B cells is
A. only mIgM
B. only mIgD
C. only mIgE
D. both mIgM and mIgD
E. both mIgE and mIgD
第一本海洋学综合教科书《The Oceans》的作者是（）。
A. 威廉·贝比
B. 威维尔·汤姆森
C. 莫里
D. 斯维尔德鲁普
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