第4题: [单项选择]Questions 19 to 22 are based on the conversation you have just heard. A. A taxi driver. B. A bus driver. C. A college student. D. A dustman. 参考答案:A 答案解析:[听力原文]19-22 Operator: Hello. This is the emergency 911 operator. Taxi Driver: Help. Help. Plea
第5题: [单项选择]选用装配用设备应根据()。 A. 产品结构特点 B. 产品制造方法 C. 产品加工方法 D. 产品所用材料 参考答案:A