2019版一轮优化探究英语（人教版）练习：选修七 Unit 4 Sharing Word版含答案

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1、Ⅰ.阅读理解APatientsintheearlystagesofAlzheimer'sdiseaseoftenstruggletorememberrecentlylearnedinformation,meaningtheyforgetthingslikeimportantappointmentsorwheretheylefttheirkeys.Butitseemsthatthesememoriesarenotlost.Theyarestillfiledawayinthebrainsomewhere;theyjustcan'tbeeasilyaccessed.Now,resea

2、rchersatMIThavedevelopedameansofgettingbackmemoriesinmicesufferingfromAlzheimer's.Themethodreliesonatechniquethatuseslighttocontrolgeneticallymodifiedneurons(转基因神经元).Currentlyitistooearlytobeusedinhumantrialsasitinvolvesinsertinglightemitting(发光)equipmentintothesubjects'brains,butthesameprin

3、ciplesstillapply,theresearcherssaid.“Theimportantpointisthatthisisevidenceoftheconcept.Thatis,evenifamemoryseemstobegone,itisstillthere.It'samatterofhowtogetitback，”saidtheseniorresearcherSusumuTonegawa.Theteamtooktwogroupsofmice,onegeneticallyengineeredtodevelopAlzheimer'sandonehealthy.They

4、thenplacedthemintoaroomandgavethemamildelectricshock.Allofthemiceshowedfearwhenputbackanhourlater.Whenplacedintheroomathirdtimeseveraldayslater,theAlzheimer'smiceactednormally.Theyhadforgottentheshock.Theresearcherswerethenabletobringbackthememoryoftheshockbyactivating(激活)thecellsinwhichthem

5、emorieswerestored.Evenwhenthemicewereputintoanunfamiliarroom,theyshowedfearwhenthecellsassociatedwiththeshockwereactivated.“Shorttermmemoriesseemtobenormalinorderofhours.Butforlongtermmemories,theseearlyAlzheimer'smiceseemtobedamaged，”saidtheleadresearcherDheerajRoy.“Directlyactivatingthecel

6、lsthatwebelieveareholdingthememoryhelpsthemgetitback.Thissuggeststhatitisindeedanaccessproblemtotheinformation,notthattheyareunabletolearnorstorethismemory.”[语篇解读]　本文主要介绍了利用光控制转基因神经元使早老性痴呆病患者恢复记忆的技术.1．WhatcanwelearnabouttheresearchersatMIT?A．Theyarethepioneersofbrainresearch.B．Theyhaveusedth

7、emethodinhumantrials.C．TheycancureAlzheimer'susingthenewmethod.D．TheycangetbackmemoriesinmicewithAlzheimer's.解析:细节理解题.根据第二段的第一句“Now，researchersatMIThavedevelopedameansofgettingbackmemoriesinmicesufferingfromAlzheimer's.”可知，他们能够使患有早老性痴呆病的老鼠恢复记忆.答案:D