每天前20名注册可获免费名师辅导名额有限真人一对一口语训练抢注网址：www.englishvip.com/wenkxd.htm洛基国际英语竭诚为您服务作为四六级考试的重要题型，阅读的练习不可小觑。每日精选《卫报》《时代周刊》等外刊上的精华文章，带你扩大视野，积累词汇，提高阅读速度！【今日阅读推荐】本篇阅读材料“社交网络如何让城市生活更美好”选自《大西洋城市周刊》（原文标题：HowFacebookandTwitterAreMakingDevelopingWorldCitiesBetter2012.11.13）。Whenahousewifeinaworking-classdistrictofMexicoCitygetsfedupwiththelackofworkinglightsinherlocalpark,shelogsontoTwitterandcomplainsdirectlytothecity'smayor.InanageofHYPERLINK"http://dict.hjenglish.com/w/incessant"\t"_blank"incessantdigitalchatter—andinacityof22million—thismightseemHYPERLINK"http://dict.hjenglish.com/w/futile"\t"_blank"futile.Butthemayor,whohasmorethan600,000Twitterfollowers,repliestohercomplaintwithinhours.Heordersthecity'spublicworksdepartmenttotakeaction.Severalweekslater,hepostsphotosofnewlightsbeinginstalledintheparkandthanksthewomanforbringingtheproblemtohisattention.Infact,themayor'sTwitterfeedreadslikeaHYPERLINK"http://dict.hjenglish.com/w/gritty"\t"_blank"grittyHYPERLINK"http://dict.hjenglish.com/w/chronicle"\t"_blank"chronicleoflifeinamegacity.Potholes,ofcourse,butalsocomplaintsandannouncementsaboutgarbagecollection,crime,trafficlights,constructiondelays,poweroutages,watersupplies,bikelanes,floodedsewers,corruption,airquality,andtheHYPERLINK"http://dict.hjenglish.com/w/proverbial"\t"_blank"proverbialrudebureaucrat.Atfirstglance,itlookslikeastrangemixofuneditedrantsbyHYPERLINK"http://dict.hjenglish.com/w/aggravated"\t"_blank"aggravatedcitizensandupbeatpublicrelationsbyanambitiousmayor.Butasustainedlookshowsthatasurprisingnumberofthesevirtualconversationsfollowacycle—citizencomplains,mayorlistens,citysolvestheproblem—thatuntilrecentlywouldhaveseemedutopianforanoverpopulatedandunderfinancedmetropolisinthedevelopingworld.InLatinAmerica,MexicoCityisnotunique.Useofsocialmediaisgrowingatabreathtakingpaceacrosstheregion.WhenFacebookpassedthe1billionusermarkinOctober,fewpeoplenoticedthat19percentofthoseusersliveinLatinAmerica(whichonlyaccountsfor8percentoftheworld'spop