本讲重点: 键盘接口(键盘种类,矩阵键盘的行扫描与 线反转法的电路、原理与编程); D/A转换接口(DAC0832产生各种波形); A/D转换接口(ADC0809三种读取方式,电路 及单路采集与多路采集编程应用)

1. When you can measure what you are speaking about, and can express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowleage is of a meagre and unsatisfactory kind: It may be the beginning of knowledge, but you have scarcely in your thoughts advanced to the stage of science. Lord Kelvin, a physicist

Requirements specification: A structured document that sets out the services the system is expected to provide Should be precise so that it can act as a contract between the system procurer and software developer and thus needs to be understandable by procurers and developers

Is there a problem? Why Hard? Syllabus EXamples AAS(FAA Advanced Automation System) FBI CIC IRS Modernization Program

Table of Contents: Teaching Objectives Teaching Methods A Brief Description of the Class Language Points Teaching Procedures Evaluation Appendix

案情 1990年9月,湖北某进出口公司(卖方)与沙特阿拉伯某公司(买方)就两笔共计200万 条麻袋买卖以电传方式达成协议。 根据协议:卖方向买方发出已经卖方签署的A、B两份“售货确认书”。其中确认书A的主 要内容是:数量为100万条,单价0。325美元,总价32.5美元,价格条款件为CFR(成本加 运费)某港交货;确认书B的主要内容为:数量为100万条,单价0。325美元,总价32。5 美元,价格条件亦为CFR某港交货。 两份售货确认书均明确要求买方于同年10月10日前向卖方开立100%的、保兑的、不可撤 销的即期付款信用证,同时规定了仲裁条款,确定以中国国际贸易促进委员会对外经济贸易仲 裁委员会为仲裁机构并使用其仲裁程序规则,该会仲裁裁决为终极裁决

Following the September 1 l terrorist attacks on New York and Wash ington, Congress rushed into action and quickly passed antiterrorism legis lation known as the USA Patriot Act. The Patriot Act has been widely understood as a\sweeping\ antiterrorism law that gave the government vast new powers to conduct electronic surveillance over the Internet The Act's surveillance provisions proved so controversial that Congress added a sunset provision that will nullify several of its key provisions after

Consolidating Servers Same motivations for multiprotocol servers Higher risk to use a single, multiservice server, why? Consolidating many services into a single server process reduces the number of executing processes dramatically The total code required

Introduction Examines a de facto standard for external data representation and presentation as well as a set of library procedures used to perform data conversion Describes the general motivations for using an external data representation and the details of one particular implementation

一、单项选择题(每题1分,共30分) 1.双腔支气管插管的主要目的是()(16章) A有利于更好地控制呼吸 B使健康肺和病侧肺的气道隔离通气 C通气效率高 D手术视野清楚 E避免开胸侧肺萎缩,出现低氧血症 答案:B