1、
Intoday’sworld,sleepexpertssaythatforabetternight’srest,AmericansshouldturnofftheirsmartphonesoriPadbeforesleeping.Suchelectronicproductsmakethebrainmoreactive,andtheninfluencetheirsleep.Butaccordingtoalatestsurvey,morethan90%ofAmericansregularlyuseacomputerorsomeotherkindsofelectronicproductsinthehourbeforebed.
Researchersarefindingthatman-madelightfromsomeelectronicproductsatnightmayreducethebrainchemicals(化学物质)thathelpsleep.Theresearchersshowedthatsittinginthelightfromcomputertabletsclearlyloweredlevelsofthechemicalwhichmanagesourbodyclocksandplaysaroleinthesleepcycle.
Inthestudy,theresearchersletvolunteersread,playgamesandwatchmoviesonatabletfordifferenttimewhilemeasuring(测量)howmuchlighttheireyesreceived.Theyfoundthattwohoursofsittingbeforeabrighttabletscreenatnightreducedthesleepchemicallevelsbyabout22%.
Studiesofstudentsusingcomputersatnighthavegotthesimilarresults.Andresearcherssaythatmaynotonlycausesleeplessness,butalsoraisetheriskofobesity(肥胖症),diabetes(糖尿病)andotherdiseases.
Tobeonthesafeside,theresearchersadviseustousecomputerslessbeforebed,orattheveryleastturningdownyourscreenasmuchaspossible.
【1】Whatcanwelearnfromthefirstparagraph?
A.Americansdon’tgetenoughsleep.
B.Electronicproductsareverypopular.
C.Thebrainbecomesmoreactiveatnight.
D.Sleepexpertsneverusesmartphones.
【2】ThevolunteersinthestudydidthefollowingthingsEXCEPT_____.
A.listeningtomusic
B.playingcomputergames
C.watchingmovies
D.readingelectronicbooks
【3】Theunderlinedword“that”probablymeans____inthepassage.
A.makingasurveyaboutsleep
B.usingsmartphonesinthedaytime
C.sittinginabrightroom
D.surfingtheInternetatnight
【4】Whatdoesthepassagetellustodotohaveagoodsleep?
A.LearntousesmartphonesoriPad.
B.WatchsomerelaxingTVprograms.
C.Turndownthescreentothelowest.
D.Trytosleepearlierthanbefore.
【1】B
【2】A
【3】D
【4】C
试题分析:在当代睡眠专家表明为了有个更好的晚间休息,美国人应该在睡前关闭他们的手机和平板。专家进行了一系列研究和实验,并说明其中危害。研究者建议我们睡觉前拿少玩电脑或者尽可能的减小屏幕的亮度。
【1】B推理判断题根据文中accordingtoalatestsurvey,morethan90%ofAmericansregularlyuseacomputerorsomeotherkindsofelectronicproductsinthehourbeforebed.可知据最新的调查,在上床睡觉前高于90%的美国人经常使用电脑或其他电子产品。故选B
【2】A细节理解题根据文中Inthestudy,theresearchersletvolunteersread,playgamesandwatchmoviesonatabletfordifferenttimewhilemeasuring(测量)howmuchlighttheireyesreceived.可知未提及听音乐。故选A
【3】D细节理解题根据文中Studiesofstudentsusingcomputersatnighthavegotthesimilarresults.Andresearcherssaythatmaynotonlycausesleeplessness,butalsoraisetheriskofobesity(肥胖症),diabetes(糖尿病)andotherdiseases.可知研究表明学生晚上玩电脑也会有类似的结果。研究者表示学生晚上玩电脑不仅会引起失眠同时会增加患肥胖症、糖尿病和其他疾病的危险。故选D
【4】C细节理解题根据文中theresearchersadviseustousecomputerslessbeforebed,orattheveryleastturningdownyourscreenasmuchaspossible.可知研究者建议我们睡觉前少玩电脑或者尽可能的减小屏幕的亮度。故选C
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