第20题: [单项选择]Questions 11 to 18 are based on the conversation you have just heard. A. Catch a bus. B. Demand a telephone number. C. Cash a check. D. Make a phone call. 参考答案:D 答案解析:[听力原文] M: Operator, I’ve been trying to make a call for over an hour and I keep getting a busy si
第22题: [单项选择]已知中断类型号为18H,则其中断服务程序的入口地址在中断向量表中的位置是() A. 0000H:00072H~0000H:0075H B. 0000H:00072H~0000H:0073H C. 0000H:00060H~0000H:0063H D. 0000H:00060H~0000H:0061H 参考答案:C