第26题: [单项选择]运动试验是哪种周围血管病常用检查手段() A. 血栓性浅静脉炎 B. 臁疮 C. 动脉硬化闭塞症 D. 下肢深静脉血栓形成 E. 青蛇毒 参考答案:C
第27题: [单项选择]Passage One Questions 26 to 28 are based on the passage you have just heard.A. Rats can populate rapidly. B. Population explosion can lead to violence. C. Overcrowdedness may have the same effects on man. D. It is a natural law that animals live and die. 参考答案:C 答案解析:[解析] What is the experiment done on rats intended to prove