2019版一轮英语（人教版）（话题部分）练习：必修二 Unit 1 Cultural relics

《2019版一轮英语（人教版）（话题部分）练习：必修二 Unit 1 Cultural relics》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、Ⅰ.阅读理解APatientsintheearlystagesofAlzheimer'sdiseaseoftenstruggletorememberrecentlylearnedinformation,meaningtheyforgetthingslikeimportantappointmentsorwheretheylefttheirkeys.Butitseemsthatthesememoriesarenotlost.Theyarestillfiledawayinthebrainsomewhere;theyjustcan'tbeeasilyaccessed.No

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

3、butthesameprinciplesstillapply,theresearcherssaid.“Theimportantpointisthatthisisevidenceoftheconcept.Thatis,evenifamemoryseemstobegone,itisstillthere.It'samatterofhowtogetitback，”saidtheseniorresearcherSusumuTonegawa.Theteamtooktwogroupsofmice,onegeneticallyengineeredtodevelopAlzheime

4、r'sandonehealthy.Theythenplacedthemintoaroomandgavethemamildelectricshock.Allofthemiceshowedfearwhenputbackanhourlater.Whenplacedintheroomathirdtimeseveraldayslater,theAlzheimer'smiceactednormally.Theyhadforgottentheshock.Theresearcherswerethenabletobringbackthememoryoftheshockbyactiv

5、ating(激活)thecellsinwhichthememorieswerestored.Evenwhenthemicewereputintoanunfamiliarroom,theyshowedfearwhenthecellsassociatedwiththeshockwereactivated.“Shorttermmemoriesseemtobenormalinorderofhours.Butforlongtermmemories,theseearlyAlzheimer'smiceseemtobedamaged，”saidtheleadresearcherD

6、heerajRoy.“Directlyactivatingthecellsthatwebelieveareholdingthememoryhelpsthemgetitback.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．Theyaret

7、hepioneersofbrainresearch.B．Theyhaveusedthemethodinhumantrials.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

8、。答案：D