第10题: [单项选择]{{I}} Question 23 is based on the following news. At the end of the news item, you will be given 5 seconds to answer the question.
Now listen to the news.{{/I}} A. By 1.8%. B. By0.8%. C. By 8%. D. By 11%. 参考答案:A 答案解析:[听力原文]
U.S. retail sales surged 1.8% last month as buyer incentives led to the biggest gain in a
第12题: [单项选择]IEEE802.7标准定义了 A. 宽带网络规范 B. 局域网LAN体系结构、网络互连 C. 城域网MAN介质访问控制子层与物理层规范 D. 光纤传输规范 参考答案:A 答案解析:[解析] IEEE802.7标准定义了宽带网络规范;IEEE802.1标准定义了局域网LAN体系结构、网络互连,以及网络管理与性能测试;IEEE802.6标准定义了城域网 MAN介质访问控制子层与物理