高中英语Unit2TheUnitedKingdom培优练习含解析新人教版必修5202105282144

Unit 2 The United Kingdom培优练习 (时间：100分钟；满分：120分)一、阅读理解(共15小题；每小题2分，满分30分)AThe brain is a remarkable

Unit2TheUnitedKingdom 培优练习 (时间：100分钟；满分：120分) 一、阅读理解 (共15小题；每小题2分，满分30分) A Thebrainisaremarkablepart.It’sresponsibleforthoughtsandfeelings. Nowanewstudyfindsthatgoingthroughtoughtimesasakidalsocanhavean impact.Theadultbrainsofpeoplewholivedthroughlotsofstressbeforethe ageofsix—andthenbecamedepressedoranxiousasteenagers—weredifferent comparedwithadultswhohadaneasierchildhood.Itseemsthatteenschanged theshapeoftheirbrainsbyinternalizing(使内在化)thestressesexperienced yearsearlier. Researchersalreadyknewthattheshapeandsizeofachild’sbraincan changeinresponsetolotsofstress.Theyalsoknewthatadultsweremore likelytobedepressedif，askids，they'dlivedinpoverty.Somestudiesshowed thatthesedepressedadultshadunusualchangesintheirbrainshape.Butno onehadtestediftheearlystressandlaterbrainchangeswerelinked. ScientistsinEnglandstudiedalmost500boysfrombirthuntiltheagesof 18to21.SarahJensenisoneofthenewstudy'sauthors.Almostallofthe boysherteamstudiedexperiencedsomehardtimesaskids.And,sheconcludes， “Thisisnotnecessarilyharmful.”Tosomeextent，that'sjustlife.Whatcan bedangerous，shesays，iswhenchildrenexperiencetoomanyformsof difficulties.Herteam’snewdatasuggestthatthetougherthechildhood，the strongertheimpactonthebrainmightbe. What’shappeningintheworldaroundusrelatestohowwefeel.Herteam linkedmorechildhoodstresstomoredepression.Still，shenotes，it’s possiblethatifyoufindsupportforanxietyordepression，youmightbeable topreventthechangesseenhere.“Ifyoucanchangetheenvironment，youcan changethecourseofthings，”Sarahsays.So，sherecommends，ifteensdevelop