2019版一轮优化探究英语人教版话题部分练习话题14-必修二-Unit-1-Cultural-rel.doc

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欢迎广大教师踊跃来稿，稿酬丰厚。

Ⅰ.阅读理解
A
PatientsintheearlystagesofAlzheimer'sdiseaseoftenstruggletorememberrecentlylearnedinformation,meaningtheyforgetthingslikeimportantappointmentsorwheretheylefttheirkeys.Butitseemsthatthesememoriesarenotlost.Theyarestillfiledawayinthebrainsomewhere;theyjustcan'tbeeasilyaccessed.
Now,researchersatMIThavedevelopedameansofgettingbackmemoriesinmicesufferingfromAlzheimer's.Themethodreliesonatechniquethatuseslighttocontrolgeneticallymodifiedneurons(转基因神经元).Currentlyitistooearlytobeusedinhumantrialsasitinvolvesinsertinglightemitting(发光)equipmentintothesubjects'brains,butthesameprinciplesstillapply,theresearcherssaid.
“Theimportantpointisthatthisisevidenceoftheconcept.Thatis,evenifamemoryseemstobegone,itisstillthere.It'samatterofhowtogetitback，”saidtheseniorresearcherSusumuTonegawa.
Theteamtooktwogroupsofmice,onegeneticallyengineeredtodevelopAlzheimer'sandonehealthy.Theythenplacedthemintoaroomandgavethemamildelectricshock.Allofthemiceshowedfearwhenputbackanhourlater.Whenplacedintheroomathirdtimeseveraldayslater,theAlzheimer'smiceactednormally.Theyhadforgottentheshock.
Theresearcherswerethenabletobringbackthememoryoftheshockbyactivating(激活)thecellsinwhichthememorieswerestored.Evenwhenthemicewereputintoanunfamiliarroom,theyshowedfearwhenthecellsassociatedwiththeshockwereactivated.
“Short­termmemoriesseemtobenormalinorderofhours.Butforlong­termmemories,theseearly­Alzheimer'smiceseemtobedamaged，”saidtheleadresearcherDheerajRoy.“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．Theyarethepioneersofbrainresearch.
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，researchersatMIThavedeveloped