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1、Unit1Byreadingweenrichthemind,byconversationwepolishit.读书使人充实，交谈使人精明。学习内容题材词数建议时间得分统计做题备忘PartAText1文化教育462/10Text2科普知识474/10Text3社会生活445/10Text4商业经济462/10PartB文化教育645/10PartC社会生活449/10PartADirections：Readthefollowingtexts.Answerthequestionsbloweachtextbychoosing[A],[B],[C]or[D].Text1CatnetonWa
2、lkerlearnedthehardwaythatsharinginformationonlinecanhaveunintendedconse-quences.In2005,thesophomoreatFisherCollegeinBostonorganizedastudentpetitiondedicatedtogettingacampuspoliceguardfiredandposteditonthepopularcollegesocialnetworkFacebook.com.Walkerwrotethattheguard“lovestoantagonizestudents.
3、.,andneedstobeeliminated.”Itwasapoorchoiceofwords.Anotherstudentinformedschoolofficials,whologgedonandinterpretedthecommentsasthreatening.ThoughWalkerclaimedhewastryingonlytoexposetheguard’sdemeanor,hewasexpelled.He’snowenrolledatanothercollegeandadmitshemadeaseriousmistake.“Iwasanaive21-year-
4、old,”hesays.Creatingapageonasocial-networkingsiteisnowacherishedformofself-expressionatuniversitiesaroundtheworld.Studentsusead-supportedserviceslikeFacebook,MySpace,TagWorldandBebotomakefriends,plantheirsociallivesandprojecttheirpersonalities.ThemostpopularsiteamongcollegestudentsisFacebook,w
5、ithmorethan8millionmembers.Astudent’spersonalFacebookpageisusuallyarevealing,dynamicchronicleofcampuslife—oneclearlynotmeantfortheeyesofparents,teachersoranyoneelseolderthan25.Butadultsaretakingnotice.SiteslikeFacebookareaccessibletonearlyanyonewillingtospendthetimetogainaccess:teachers,school
6、administrators,evenpotentialemployersandthepolice.Suchonlineservicescancreatetheillusionofprivacywherenoneactuallyexists.Facebook,inparticular,wasdesignedtoemphasizeprivacyandintimacy.Onlyotherusersatyourschool(withthesamecollegee-maildomainname),andthoseinnetworksyoujoin,canseeyourhomepage.Bu
7、tdeterminedoff-campusvisitorscanpersuadeastudentoralumnustohelpthemaccessthestudent’spage.Whathappenswhentheidentityyourevealtofriendssuddenlyoverwhelmsthefacadeyoupresenttogrown-ups?Theresultscanbeawkward—orworse.Photosfromdrunkenparti
