第10题: [单项选择]有关胎盘防御功能的叙述正确的是() A. 胎盘的屏障作用有限 B. 病毒(如风疹病毒、巨细胞病毒等)、分子量小对胎儿有害的药物,均可通过胎盘影响胎儿致畸甚至死亡 C. 细菌、弓形虫、衣原体、螺旋体可在胎盘部位形成病灶,破坏绒毛结构,进入胎体感染胎儿 D. 母血中免疫抗体如IgG能通过胎盘 E. 以上均正确 参考答案:E
第16题: [单项选择]What do we know about the man’s dog A. The other dogs are afraid of him. B. It eats only cat food. C. It like cats better than dogs. 参考答案:C 答案解析:[听力原文] F: Why do you say your dog is like a cat. M: Because it plays with cats and it is afrai