第7题: [单项选择]当出现中断事件后,必须把______才能把断点的信息保护起来。 A. 当前PSW放到旧PSW B. 旧PSW放到当前PSW C. 新PSW放到当前PSW D. 所有PSW保持不变 参考答案:A 答案解析:[解析] 中断响应:处理器每执行一条指令后,硬件的中断位置立即检查有无中断事件发生,若有中断事件发生,则暂停现行进程的执行,而让操作系统的中断处理程序占用处理器,这一过程称为“中断响应”。
第23题: [单项选择]Questions 23 to 25 are based on the passage you have just heard.What made the speaker change his life style A. His desire to start his own business. B. The crisis in his family life. C. The decline in his health. D. His dream of living in the countryside. 参考答案:B 答案解析:[精解] 题干问:“是什么让说话者改变了他的生活方式 ”材料的后面说“The crisis came when my wife left me.”即,说话人家中发生的事故改变了他的生活方式,所以本题的