摘要:OSI（Open System Interconnect）开放式系统互联。一般都叫OSI参考模型，是ISO（国际标准化组织）组织在1985年研究的网络互联模型。国际标准化组织ISO发布的最著名的标准是ISO/iIEC 7498，又称为X.200协议。[阅读全文]

摘要:TCP/IP（Transmission Control Protocol/Internet Protocol)的简写，中文译名为传输控制协议/因特网互联协议，又叫网络通讯协议，这个协议是Internet最基本的协议、Internet国际互联网络的基础，简单地说，就是由网络[阅读全文]

摘要:演讲原文(Wendell WilIkie)Nov.11,1940And finally our government must change its punitive attitude towards both big and little business. Regulations there must be. We, of the opposition, have consistent[阅读全文]

摘要:演讲原文(Wendell WilIkie)Nov.11,1940In Britain, some opposition party leaders are members of the government, and some say that a similar device should be adopted here. That is a false conception of ou[阅读全文]

摘要:演讲原文(Wendell WilIkie)Nov. 11, 1940.Good evening, America:Twenty-two years ago today a great conflict raging on the battlefields of Europe came to an end. The guns were silent. A new era of peace b[阅读全文]

摘要:当获悉某人晋升或是在事业上取得巨大成就时，应该打个电话或是写封便签祝贺。这种友好往来对建立和巩固友好的商业合作关系大有益处。 　　Here are some principles that congratulatory letters follow: 　　1. The[阅读全文]

摘要:条件状语从句主要由if,unless,supposing(suppose)引导：if:I must leave if that's the case. 如果情况如此我就得走了。What would Diana think of him if he failed? 如果他失败，戴安娜会对他怎么想？If she said[阅读全文]