下列哪些CD分子与B细胞识别、黏附、活化无关
A. CD19
B. CD21
CD40L
D. CD40
E. CD80
Questions 16 to 18 are based on the passage you have just heard.
A. Helping control pain of patients.
B. Contributing to being calm and happy.
C. Enhancing interpersonal relationship.
D. Increasing young children"s mental ability.
IgG用木瓜蛋白酶水解后可以形成
A. 一个Fab段和一个Fc段
B. 两个Fab段和一个Fc段
C. 两个Fab段
D. 两个Fab段和pFc'
E. 一个F(ab')2和pFc'
以下属于体内细胞免疫测定法的试验是
A. E-花环试验
B. 淋巴细胞转化试验(增殖反应)
C. TAT皮肤试验
D. 结核菌素皮肤试验
E. 细胞毒试验