文中留侯是个什么样的人物形象?作者是如何评价他的?
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听力原文: We are going to Start the campaign by putting fullpage ads in all the major newspapers over a period of a month. They'll be in weekly, probably on a Mon day, and after that we are planning to focus on TV and Radio.
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The table shows household spending on various items as a percentage of the total in a Chinese city in 1990 and 2005.
Summarise the information by selecting and reporting the main features and by making comparisons where relevant
Write at least 150 words.
阅读以下说明,回答问题。
说明:某小公司的网络拓扑如图13-11所示。其中路由器具有ISDN模块,公司网络通过ISDN连接到ISP。
1)在应用服务器关机的情况下,公司员工能连接上Internet吗?简要解释。
(2)在路由器和ISDN之间需要加入终端适配器(TA) 吗?试说明在什么情况下需要加入TA。
(3)公司内电话、传真机与ISDN的连接情况如图13-12所示。将图中①~②处空缺的设备名称填写在答题纸的相应位置。
(4)假设采用ISDN基本速率接口,下载1875K的文件,最
以银行存款偿还A公司货款10000元,偿还B公司货款20000元,合计30000元。