第6题: [单项选择]某高可靠性计算机系统由图所示的冗余部件构成,若每个部件的千小时可靠度为0.95,则该系统的千小时可靠度只为 (4) 。 [*] 用原型法开发一个管理信息系统,评价原型阶段的主要任务是 (7) 。 A. 修改、完善原型 B. 征求用户改进意见 C. 扩展系统功能 D. 研制者分析已建原型 参考答案:B 答案解析:[解析] 用原型法开发一个管理信息系统,评价原型阶段的主要任务是征求用户改进意见。
第27题: [单项选择]What can we learn from the woman’s reply A. She likes to be a teacher. B. She has no idea what she will do in the future. C. She thinks the man shouldn’t have asked her the question. D. She doesn’t want to be a teacher. 参考答案:D 答案解析:[听力原文] M: Are you going to be a teacher in the future W: How come you get such an idea