第5题: [单项选择]测量绝缘电阻的兆欧表是()。 A. 电磁式 B. 磁电式 C. 电动式 D. 感应式 参考答案:B
第6题: [单项选择]Questions 23 to 25 are based on the conversation you have just heard. A. Why species don’t avoid extinction by adapting. B. Why species become extinct at the rate they do. C. Why humans aren’t extinct. D. How many species aren’t extinct. 参考答案:A 答案解析:[听力原文] What puzzles the woman about extinction