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1、解：(1)A(0,2),〃(一彳，1)・117一—,—(3)如图1,可求得抛物线的顶点〃(28)设亡线〃〃的关系式为y=kx+b,将点〃、〃的坐标代入，求得°,4511y=-—x-—・••〃〃的关系式为44._116设直线肋和x轴交点为E,则点E(5,0),67f5.・•・△加c的面积为2588.⑷如图2,过点&作丄》轴于点風过点〃作0"丄V轴于点M过点&作CP丄厂轴于点F.在RtA/l/r掰与Rt△胡川屮,•••Al^A/r,ZAir莎Z丽护90°•••Bf庐/LWl,龙拆EW3,•••BfP^'CAO、C尺必二2,BC-z/rAi/
2、,(1,T).A"Oi可得点(7(2,1)；y=—?P+—x-2将点〃‘、C'的坐标代入22,可知点〃，、C在抛物线上.（事实上，点尸与点川重合）中考英语书面表达背诵范文（二）一、GreatchangesinmyhometownMorethantwentyyearsago,myhometownwasjustasmall,oldandpoortown.Mostofpeoplewerefarmers.Therewerefewfactories.Thepeopledidn'thaveenoughfoodtoeatandworeoldcloth
3、es.Theyhadahardlife•Greatchangeshavetakenplaceinthepasttwentyyears•Thepeoplehavefoundalotofwaysofmakingmoney•Nowtherearemanytallbuildings•Theyareverybeautiful•Roadsarewideandclean•Peoplecantakebusesordrivetheirowncarstogotowork•Manypeoplehavecellphonesandpersonalcomputer
4、s.People'slivingconditionshaveimprovedalot•Thankstothegovernmentsefforts•myhometownisbecomingmoreandmorebeautiful•二、SavetheearthHowtoprotecttheenvironmenthasbecomeoneofthebiggestproblemsintheworld•It'sourdutytoprotectourenvironment•Nomatterwherewelive,weshoulddosomething
5、tokeepourneighborhoodcleanandtidy.Wecancollectwastepaperorotherwastethingsforrecycling.Weshouldplantmoretreesandweshouldpreventthosefactoriesfrompouringwastewaterintorivers,lakesandfields.Weshouldn，tleaverubbisheverywhereandspitinpublicplaces•Wemustn，tpicktheflowersorste
6、ponthegrassinpublic.Ifeveryonetrieshisbesttoprotecttheenvironment,theworldwillbecomemuchmorebeautifulandourlifewillbebetterandbetter•二*ImproveourenvironmentGoodenvironmentcanmakepeoplefeelhappy.Toimprovetheenvironmentmeanstoqualifyourlife•Whatshouldwedotoimproveourenviro
7、nment?Weshouldplantmoretrees•Andweshouldpreventthosefactoriesfrompouringwastewaterintorivers,lakesandfields•Wheneverweseelitterontheground,weshouldpickitupandthrowitintoadustbin.Don，tspitinpublicplaces•Don"tdrawonpublicwalls•It'sourdutytokeepourearthcleanandtidy•Pollutio
8、naroundusInrecentyearsourlifeisbecomingbetterandbetter.Butourenvironmentisbecomingworseandworse.It，sver
