第16题: [单项选择]独特型抗原存在于 A. MHCI类分子的α1区 B. MHCⅡ类分子的β1区 C. MHCⅡ类分子的α1区 D. TCR、BCR或lg的V区 E. CR、BCR或lg的C区 参考答案:D
第17题: [单项选择]Questions 19 to 22 are based on the conversation you have just heard. A. Think. B. Sit down. C. Talk with his classmates. D. Wander around. 参考答案:C 答案解析:[听力原文] What doesn’t Peter need to do while he is working [听前预测] 选项皆为动词原形,涉及思考、坐下、讨论及四处走动。推断提问与