（全国卷）2019届高考英语一轮复习unit4sharing课时作业新人教版选修7

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1、Unit4SharingⅠ.阅读理解APatientsintheearlystagesofAlzheimer'sdiseaseoftenstruggletorememberrecentlylearnedinformation,meaningtheyforgetthingslikeimportantappointmentsorwheretheylefttheirkeys.Butitseemsthatthesememoriesarenotlost.Theyarestillfiledawayinthebr

2、ainsomewhere;theyjustcan'tbeeasilyaccessed.Now,researchersatMIThavedevelopedameansofgettingbackmemoriesinmicesufferingfromAlzheimer's.Themethodreliesonatechniquethatuseslighttocontrolgeneticallymodifiedneurons(转基因神经元).Currentlyitistooearlytobeusedinhum

3、antrialsasitinvolvesinsertinglightemitting(发光)equipmentintothesubjects'brains,butthesameprinciplesstillapply,theresearcherssaid.“Theimportantpointisthatthisisevidenceoftheconcept.Thatis,evenifamemoryseemstobegone,itisstillthere.It'samatterofhowtogetitb

4、ack，”saidtheseniorresearcherSusumuTonegawa.Theteamtooktwogroupsofmice,onegeneticallyengineeredtodevelopAlzheimer'sandonehealthy.Theythenplacedthemintoaroomandgavethemamildelectricshock.Allofthemiceshowedfearwhenputbackanhourlater.Whenplacedintheroomath

5、irdtimeseveraldayslater,theAlzheimer'smiceactednormally.Theyhadforgottentheshock.Theresearcherswerethenabletobringbackthememoryoftheshockbyactivating(激活)thecellsinwhichthememorieswerestored.Evenwhenthemicewereputintoanunfamiliarroom,theyshowedfearwhent

6、hecellsassociatedwiththeshockwereactivated.“Shorttermmemoriesseemtobenormalinorderofhours.Butforlongtermmemories,theseearlyAlzheimer'smiceseemtobedamaged，”saidtheleadresearcherDheerajRoy.“Directlyactivatingthecellsthatwebelieveareholdingthememoryhelpst

7、hemgetitback.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

8、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