第20题: [单项选择]Questions 23 to 25 are based on the conversation you have just heard. A. He is charged with drunken-driving. B. He is caught running over a child. C. He is caught using a defective speedometer. D. He is stopped dancing go-go in the street. 参考答案:A 答案解析:[听力原文]23-25 W: If I understand you correctly, Mr. Savage, you were driving well within the speed
第25题: [单项选择]关于束颤电位,下列叙述哪一项是正确的() A. 是肌束颤动引起的电位 B. 是肌肉松弛时出现的自发电位 C. 波形与正常运动单位电位相似 D. 可以在正常人中出现 E. 上述均对 参考答案:E 答案解析:束颤电位是肌肉松弛时出现的自发电位,是肌束颤动引起的电位,也可同多相电位,一切参数与正常运动单位电位相似,可见于正常人。