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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,studiedpeopledoingWebsearchesbyrecordingtheirbra
2、inactivity.“WhatwesawwasthatpeoplewhohadInternetexperienceusedmoreoftheirbrainduringthesearch,”Dr.GarySmall,aUCLAexpertonaging,said.“ThissuggeststhatjustsearchingontheInternetmaytrainthebrainandthatitmaykeepitactiveandhealthy.”“Thisisthefirsttimethatsomeonehassimulated(模拟)anInternetsearchta
3、skwhilescanningthebrain,”Smallsaid.Histeamstudied24normalvolunteersbetweentheagesof55and76.HalfwereexperiencedinsearchingtheInternetandtheotherhalfhadnoWebexperience.However,thetwogroupsweresimilarinage,genderandeducation.BothgroupswereaskedtodoInternetsearchesandbookreadingtaskswhiletheirb
4、rainactivitywasmonitored(监视).“Wefoundthatinthebookreadingtask,thevisualcortex—thepartofthebrainthatcontrolsreadingandlanguage—wasactivated,”Smallsaid.“IndoingtheInternetsearchtask,therewasmuchgreateractivity,butonlyintheInternet-savvygroup.”HesaiditappearsthatpeoplewhoarefamiliarwiththeInte
5、rnetcanengageinamuchdeeperlevelofbrainactivity.Activitiesthatkeepthebrainengagedcanpreservebrainhealthandthinkingability.SmallthoughtlearningtodoInternetsearchesmaybeoneofthoseactivities.1Researchers whenvolunteersweredoingWebsearches. A.studiedtheInternetB.activatedthebrainC.monitoredthe
6、brainactivityD.recordedtheirmemories解析细节理解题。由第五段可知,当志愿者在网上搜索时,研究人员监控着他们的大脑活动。答案C2Thetwovolunteergroupswere . A.ofthesameageB.similarineducationC.goodatthecomputerD.booklovers12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B3
7、Accordingtothepassage,wecanlearnthat . A.searchingtheWebkeepsthebrainmoreengagedB.readingbookskeepsthebrainmoreengagedC.watchingTVkeepsthebrainmoreengagedD.chattingonlinekeepsthebrainmoreengaged解析细节理解题。由最后一段第一句话“...whoarefamiliarwiththeInternetcanengag
