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1、第四单元检测(时间:100分钟 满分:120分)第一部分 阅读理解(共两节,满分40分)第一节(共15小题;每小题2分,满分30分)阅读下面短文,从每题所给的A、B、C、D四个选项中,选出最佳选项。ASearchingtheInternetmayhelpmiddle-agedandolderadultskeeptheirmemoriessharp,USresearcherssaid.ResearchersattheUniversityofCalifornia,LosAngeles,studiedpeo
2、pledoingWebsearchesbyrecordingtheirbrainactivity.“WhatwesawwasthatpeoplewhohadInternetexperienceusedmoreoftheirbrainduringthesearch,”Dr.GarySmall,aUCLAexpertonaging,said.“ThissuggeststhatjustsearchingontheInternetmaytrainthebrainandthatitmaykeepitactive
3、andhealthy.”“Thisisthefirsttimethatsomeonehassimulated(模拟)anInternetsearchtaskwhilescanningthebrain,”Smallsaid.Histeamstudied24normalvolunteersbetweentheagesof55and76.HalfwereexperiencedinsearchingtheInternetandtheotherhalfhadnoWebexperience.However,the
4、twogroupsweresimilarinage,genderandeducation.BothgroupswereaskedtodoInternetsearchesandbookreadingtaskswhiletheirbrainactivitywasmonitored(监视).“Wefoundthatinthebookreadingtask,thevisualcortex—thepartofthebrainthatcontrolsreadingandlanguage—wasactivated,
5、”Smallsaid.“IndoingtheInternetsearchtask,therewasmuchgreateractivity,butonlyintheInternet-savvygroup.”HesaiditappearsthatpeoplewhoarefamiliarwiththeInternetcanengageinamuchdeeperlevelofbrainactivity.Activitiesthatkeepthebrainengagedcanpreservebrainhealt
6、handthinkingability.SmallthoughtlearningtodoInternetsearchesmaybeoneofthoseactivities.1Researchers whenvolunteersweredoingWebsearches. A.studiedtheInternetB.activatedthebrainC.monitoredthebrainactivityD.recordedtheirmemories解析细节理解题。由第五段可知,当志愿者在网上搜索时,研
7、究人员监控着他们的大脑活动。答案C2Thetwovolunteergroupswere . A.ofthesameageB.similarineducationC.goodatthecomputerD.booklovers解析细节理解题。由第四段最后一句“However,thetwogroupsweresimilarinage,genderandeducation”可知,B项符合题意。A项使用了thesame,与原文similar不符。答案B3Accordingtothepassage,wecan
8、learnthat . A.searchingtheWebkeepsthebrainmoreengagedB.readingbookskeepsthebrainmoreengagedC.watchingTVkeepsthebrainmoreengagedD.chattingonlinekeepsthebrainmoreengaged解析细节理解题。由最后一段第一句话“...whoarefamiliarwiththeInternetcanengagei
