点击切换搜索课件文库搜索结果(4404)
文档格式:PPT 文档大小:100.5KB 文档页数:20
To present and practice English as it is used both in the explanation of modern machines and the processes they carry out. It also covers describing the operations needed to get machines to work and to show others how to undertake certain business operations Back
文档格式:PPT 文档大小:261.5KB 文档页数:9
一、棘轮机构的工作原理 摆杆1左右摆动,当摆杆左摆时,棘爪4插入 棘轮3的齿内推动棘轮转过某一角度。 当摆杆右摆时,棘爪4滑过棘轮3,而棘轮静止 不动,往复循环。制动爪5防止棘轮反转 这种有齿的棘轮其进程的变化最少是1个齿距, 且工作时有响声
文档格式:PPT 文档大小:98KB 文档页数:26
Warming up There are many occasions when people have to deal with money and talk about money. We know that a company always has its own Accounts department to deal with monetary problems. They pay their suppliers and receive money from buyers by invoice, letter of credit or other forms. Sometimes they need to chase money, and sometimes they owe money to other companies
文档格式:PPT 文档大小:527.5KB 文档页数:18
3.3.1凸轮机构的应用和分类 一、应用:一当从动件的位移、速度、加速度必须严格按照 预定规律变化时,常用凸轮机构。 二、组成: 凸轮—一个具有曲线轮廓或凹槽的构件,通过高副接触 凸轮机构一般由凸轮、从动件和机架三个构件组成。通常凸轮 为原动件,作连续等速转动从动件按预定规律作往复移动或摆 动
文档格式:PPT 文档大小:9.96MB 文档页数:48
全面从严治党提出的过程 全面从严治党提出的原因 新时代如何全面从严治党
文档格式:PPT 文档大小:177KB 文档页数:26
Objectives This unit deals with basic telephoning skills and also receiving and noting down messages. Students are given a chance to discuss and develop their telephone techniques and practice making different kinds of business calls. The functions of requesting, offering help and asking permission are also introduced and practiced in this unit
文档格式:PPT 文档大小:90KB 文档页数:16
objectives This unit deals with how to take notes in business contexts, how to summarize conversations and how to plan and write reports. It's a unit which can be used either as an introduction for students with little experience in report- and summary writing
文档格式:DOC 文档大小:757.5KB 文档页数:9
一、水平网站 水平网站可以将买方和卖方集中到一个市场上来进行信息交流、广告、拍卖竞标、交 易、库存管理等。水平网站一开始都以提供各大企业采购软件起家,如 , ariba Ariba.com的ariba.com 和 CommerceOne的 MarketSite net等,在积累了足够的客户群后才连带建立水平网站,因 此这类网站也可视为各大企业内部采购部门的延伸,其主要客户一般是大型企业
文档格式:PPT 文档大小:274.5KB 文档页数:23
Objectives When the learners finish learning this unit, they should be able to deal with problems and clients when placing orders (and trying to rectify them) complain and apologize know how to use present progressive tense to describe future arrangements
文档格式:PPT 文档大小:89.5KB 文档页数:12
A. What do you say? This is controlled review of the main functional language points from the previous four units. 1. Introduce the activity; ask learners how to make a prediction to elicit what they remember. 2. Alone or in pairs, learners match the remaining functions to the actual words. 3. Check their answers and then elicit alternatives for each function
首页上页427428429430431432433434下页末页
热门关键字
搜索一下,找到相关课件或文库资源 4404 个  
©2008-现在 cucdc.com 高等教育资讯网 版权所有