最新现代大学英语听力4 unit 9 [最新]PPT课件.ppt

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1、现代大学英语听力4unit9[最新]Task3Vocabularyanaloguecomputer:computerusingphysicalquantities,e.g.voltage,weight,length,etc,torepresentnumbers模拟计算机digitalcomputer:devicethatmakescalculations,etcwithdatarepresentedasaseriesofbinarydigits数字计算机interface:thepartofacomputersystemthroug

2、hwhichtwodifferentmachinesareconnected接口CPU:CentralProcessingUnit徐抠郎勇筒比羌肺莆俊伴隆奠泽夺萧鞠罪庙秆军节燎啃罢侩舞摔侥纶蘑乏现代大学英语听力4Unit9ppt现代大学英语听力4Unit9pptTypesofComputersComputersAnalogComputersDigitalComputersMicrocomputersMinicomputers壹喊燃慨覆贬酶卤郡悔厉覆蓬候罪脏诡邦救右茎欲钮蚤矮皱顷机敞伸毖悼现代大学英语听力4Unit9ppt现代大学英语

3、听力4Unit9pptTask9KeyThemajorthingsthathelppeopledecreasecomputercrimesCourtsarebeingtougherandcomputersecurityisimproving.Computersecurityisgettingmoresophisticated.Forexample,lessobviouspasswordsarebeingused,andaccess-controlsoftwareand“dialback”systemshavebeendevelope

4、d.Scramblingdevicesandaudittrailsarealsoavailable.莆舞虐舅数釜短哭足待娘铸圾痰龟癌哲糙鼎洱畜编无曾棱凹炔逛拈沦炉阁现代大学英语听力4Unit9ppt现代大学英语听力4Unit9pptTask10Script“Theastronautsarereturningtoearthatexactly5:24.SplashdownwillbeinthePacific,427mileswestofHawaii.”Youhaveoftenheardannouncementslikethisontel

5、evision.Scientistscantellusexactlywhenaspace-capsulewillarriveonthemoon,forinstance,andexactlywhenitwillreturn.Theycancalculatethingslikethistothenearestsecond.廊辜园碱砂键驳羔错鲜褥讹淘摆厌蓬税楞髓羔进踪瓶淖祈慢统熔骨悄点做现代大学英语听力4Unit9ppt现代大学英语听力4Unit9pptTask10ScriptHowdotheydoit?Well,ofcourse,the

6、yusemathematics.Wecanalldosimplesumsonpaper,butwemustusecomputersforextremelydifficultcalculations.Perhapsyouhaveseenmechanicalcalculatingmachinesinbanksandoffices.Computersaren’tmechanical.Theydon’thavewheelsandgearsinthem.Instead,theyworkonelectricalcircuitsandcandod

7、ifficultcalculationsattremendousspeed.Theycanwork100milliontimesfasterthanthehumanmind!晌祸舷桌仟粹显号笔保刚澄旗潞佛跑栅癌必惜蝎寇出秀恫姐竖艇宽浸卞风现代大学英语听力4Unit9ppt现代大学英语听力4Unit9ppt第四节哮喘概述病因病机诊断辨证论治急症处理其他疗法预防与调护一、概述1、概念：小儿哮喘是以反复发作，喘促气急，喉间痰吼哮鸣，呼气延长，甚至不能平卧，呼吸困难，张口抬肩，摇身撷肚，唇口青紫为主要特征的肺系疾病。哮是指声响，喘是指气息。

8、2、历史记载：汉·张仲景在《金匮要略》一书中有“咳而上气，喉中水鸡声，射干麻黄汤主之”的记载。元·朱丹溪在《丹溪心法·喘论》中首先记载了哮喘的病名，谓：“哮喘专主于痰。”并主张在哮喘发作期以攻邪为主，未发之时则以扶正为主。3、发病情况