第27题: [单项选择]{{B}}Passage One
Questions 26 to 28 are based on the passage you have just heard.
{{/B}} A. Because there was a beetle in each of his two hands. B. Because the beetle gave off some gas. C. Because the beetle burned his tongue. D. Because the beetle was very common. 参考答案:A 答案解析:[听力原文]
Why did Darwin put one beetle in his mouth
第33题: [多项选择]下列胎儿的特异性免疫特点中,哪项不正确() A. 仅IgG能通过胎盘,胎龄越小,IgG水平越低 B. 因缺乏IgM,细菌易由呼吸道、消化道侵入血循环 C. 因缺乏IgM,对G杆菌易感 D. 新生儿T细胞对特异性外来抗原的应答良好 E. 巨噬细胞与自然杀伤细胞功能差 参考答案:B, D