第27题: [单项选择]What did the woman do A. She built the house. B. She ordered a painting for the house. C. She hired someone to paint the house. D. She hid the house. 参考答案:C 答案解析:[听力原文] M: Your house looks nice. What did you do to it W: I had it painted.
第35题: [单项选择]引起菌群失调症的原因是()。 A. 正常菌群的遗传特性明显改变 B. 正常菌群的耐药性明显改变 C. 正常菌群的增殖方式明显改变 D. 正常菌群的组成和数量明显改变 E. 大量使用生态制剂 参考答案:D 答案解析:菌群失调症由于宿主、外环境的影响,导致机体某一部位的正常菌群中各种细菌出现数量和质量变化,原来在数量和毒力上处于劣势的细菌或耐药菌株居于优势地位,在临床上发生菌群失调症或称菌群交替症。