第5题: [单项选择]在Internet网上进行通信时,为了标识网络和主机,需要给它们定义惟一的( )。 A. 主机名称 B. 服务器标识 C. IP地址 D. 通信地址 参考答案:C 答案解析:数据库的并行处理是提高数据库系统对事务快速响应能力的有效手段。并行数据库系统的体系结构主要有3种:共享内存结构;共享磁盘结构;无共享资源结构。并行数据库技术包括了对数据库的分区管理和并行查询。一个理想
第7题: [单项选择]{{B}}Questions 11 to 18 are based on the conversation you have just heard.{{/B}} A. He must meet his teacher. B. He must attend a class. C. He must go out with his girlfriend. D. He must stay at school to finish his homework. 参考答案:A 答案解析:[听力原文]
W: John, do you want to go swimming with me today
M: Sure, but I can’ t leave now. I have