第2题: [单项选择]可将IgG裂解成F(ab’)2和数个小片段的酶是() A. 木瓜蛋白酶 B. 胃蛋白酶 C. 胰蛋白酶 D. 限制性核酸内切酶 E. β-内酰胺酶 参考答案:B 答案解析:胃蛋白酶作用于铰链区二硫键连接的两条重链的近C端,水解IgG后可获得1个F(ab’)2片段和一些小片段pFc’。因此,本题正确答案是B。
第10题: [单项选择]第一节
听下面5段对话。每段对话后有一个小题,从题中所给的[A]、[B]、[C]三个选项中选出最佳选项,并标在试卷的相应位置。听完每段对话后,你都有10秒的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。What would the woman do then [A] She would ask the man to buy a bus map for her. [B] She would try to find the bus station herself. [C] She would ask someone else. 参考答案:C 答案解析:[听力原文]
W: Can you tell me where the bus station is
M: Sorry, I really don’t know. You’ll have to