2018学年高中英语 Unit 3 Computers Section Ⅰ Warming amp；Reading Pre-reading教学案 新人教版-必修2

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1、-Unit3ComputersMostkidshavecellphonesortablets(平板)andaretextingorusingsocialmediaallthetime.Expertssaythatparentsshoulduseappstowatchoutfortheirchildren'sonlineactivity.Accordingtoasurvey,70percentofU．S.teenscarrycellphones,andRussWarner,theCEOofNetNanny,isint

2、hebusinessofprotectingkidsonline.Hisbestadvicetoparentsistoknowwhatisoutthereandtoplaninadvance.“Putaplanintoplacebecausekidsliketofeelprotected，”Warnersaid.“TheyliketofeellikeMomorDadishelping.”Accordingtoanotherstudy,almost90percentofchildrenhaveseencyberbul

3、lying(网络欺凌)inthelastyear.However,Warnersaidonly50percentofparentstalkwithkidsaboutavoidingtheseexperiences.“Thatmeanstheotherhalfdon'tandthat'saproblem，”hesaid.Warneroftenspeakstoparentgroupsconcernedaboutkeepingtheirteenssafe,“Oftentimes(时常地)ifwecan'tcontrolo

4、rwedon'tunderstandsomething,weavoiditandwecan'tdothatanymore.”Hesaidparentsneedtotalktotheirchildrenaboutonlinedanger,andthentheyneedtousesafetysoftware.Parentsshouldknowwho14-istryingtocommunicatewiththeirchildrenandwhattheyarewatchingonline.Warneraddedparent

5、salsoneedtounderstandphonesettings(设置).iPhonesettingscomewithrestrictions(限制)thatareeasytoset.Parentscanenablerestrictionswithacodethattheyknow,andtheirchilddoesnot.Parentscanalsosetphonestonotallowappstobedownloadedwithoutapasscode.Section_ⅠWarmingUp&Reading—

6、PrereadingWHOAMI?OvertimeIhavebeenchangedquitealot①.Ibeganasacalculating②machineinFrancein1642.AlthoughIwasyoungIcouldsimplify③difficultsums④.IdevelopedveryslowlyandittooknearlytwohundredyearsbeforeIwasbuiltasananalyticalmachinebyCharlesBabbage⑤.AfterIwasprogr

7、ammed⑥byanoperator⑦whousedcardswithholes,Icould“think”logically⑧andproduceananswerquickerthananyperson.Atthattimeitwasconsideredatechnological⑨revolution⑩andthestartofmy“artificial⑪①overtime经过漫长的时间；随着时间的推移，在句中作状语，句子用现在完成时。②calculate/'kælkjʊleIt/vt.计算calculator

8、/'kælkjʊleItə/n.[C]计算器calculationn.[U]计算③simplify/'sImplIfaI/vt.简化④sum/sʌm/n.总数；算术题；金额asumofmoney一笔钱⑤此句使用了固定句式：Ittakes＋时间段＋before...“过了多久才……”。⑥programv．编写程序n．(计算机)程序programmer/'prə