Burningthemidnightoilbeforeanexamorinterviewhasanoppositeeffectaccordingtoaresearchwhichfoundthatsleepisnecessaryformemoriestobe“downloaded”intothebrain.“Agoodnight’ssleepwithin30hoursoftrying

　　Burningthemidnightoilbeforeanexamorinterviewhasanoppositeeffectaccordingtoaresearchwhichfoundthatsleepisnecessaryformemoriestobe“downloaded”intothebrain.

　　“Agoodnight’ssleepwithin30hoursoftryingtorememberanewtaskisanecessaryconditionofhavinggoodrecall（回忆）intheweeksahead”scientistshavefound.

　　“Wethinkthatgettingthatfirstnight’ssleepstartstheprocessofmemoryconsolidation（加强）”saidRobertStickgoldasleepresearcheratHarvardMeidicalSchoolwhoconductedthelateststudy.

　　“Itseemsthatmemoriesarenormallywashedoutofthebrainunlesssomeprocessnailsthemdown.Ifeeluncertainthatsleepisoneofthosethingsthatdothenailingdown”ProfessorStickgoldsaid.

　　ProfessorStickgold’steamtrainedthe24peopletotelldirectionofthreediagonalbars（斜线）shownforasixtiethofasecondonacomputerscreenfullofhorizontalstripes（水平线）.

　　Halfthesubjectswerekeptawakethatnightwhiletheothersslept.Bothgroupswereallowedtosleepforthesecondandthirdnightssomakeupforanydifferencesintirednessbetweenthevolunteers（志愿者）.

　　Thosewhosleptthefirstnightweremuchbetteratrememberingthetaskwhilethesecondgroundshowednoimprovementinspiteofenjoyingtwonightsofcatch-upsleep.

　　AfurtherstudybyscientistsattheMedicalUniversityatLubeckGermanyshowedthatmemoriesarelaiddownintwostagesduringthenight.Thefirstisduringthedeepso-called“slowwave”sleepwhichusuallytakesplaceinthefirsthalfofthenight.Thesecondandlessimportantstagehappensduringtheperiodofdreamingor“rapideyemovement(REM)”.Whenpeopledon’tsleepwellinthefirsthalfofthenighttheirmemoryconsolidationisalmostthesameashavingnosleepatall.

　　1.WhichofthefollowingstatementsiscorrectaccordingtoParagraph1?

　　A.Itisnecessarytoburnthemidnightoilbeforeanexamorinterview.

　　B.Sleepspeedsupthelossofmemory.

　　C.Manshouldhaveagoodsleepifhewantstokeepagoodmemory.

　　D.Stayinguplatewillmakeyoubetterpreparedforanexamorinterview.

　　2.ItcanbeinferredfromParagraph4that_____.

　　A.someprocesshelpsmemoriestobewashedoutofthebrain