2019版高考英语（外研版）ALessoninaLab单元检测含解析

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1、单元检测（五）ALessoninaLabI•阅读理解ABeingintheschoofssciencelabcanbeexciting,becauseyou，redoingsomethingdifferentfromsittingatyourdesklisteningtoyourteacherButfunaslabworkis，youhavetoobservethesafetyrulesifyoudon"twanttohurtyourselforyourlabpartner.Thefirstruleist

2、obehaveresponsiblyinthelaboratoryatalltimes.Whenyourteacherisshowingyoulabequipment^listentowhatheistellingyou,becausesomeoftheequipmentcanbedangerous.Becomefamiliarwithyourlabassignment（任务）beforeyoustartdoingit.Thismeansreadingeverythingtheteacherhaswrit

3、tendownandaskingquestionsifyoudon，tunderstandaninstructionoraterm.Donottrytoworkalone.Ifyourpartnerisabsent，letyourteacherknowsoshecanassignanotherstudenttoworkwithyou.Anddon"tdoanyotherexperimentsotherthanwhatyouhavebeenassigned*Wearyourlabapron（围裙）andsa

4、fetygoggles（护目镜）wheneveryouareworkingonalabassignment.Onlabdays,wearoldclothingthatyouwon11mindgettingdamaged.Makesurethisclothingcoversasmuchofyourskinaspossible.Keepyourhandsawayfromyourskin,face,eyesandmouthwhenyouareworkingwithdangerouschemicals*Youwi

5、llbeworkingwithfireinthelabwithanalcohollamp.UsegloveswhenhandlinghotlabequipmentIfyouhavelonghair,pullitbackinaponytail（马尾辫）androlluplongsleeves.Don"tputpaper,chemicals，labequipmentoranypartofyourbodyintheflame.Whenyouuseasharpinstrument,treatitwithcare>

6、Donotpointitatyourselforanyoneofyourfellowclassmatesduringtheexperiment.语篇幅強：在实验室做实验很有趣，但也处处存在危险。因此，建守实验室的安全规则是很有必要的。1.Ifyoudon，tfollowthesafetyrules,youwillprobably•A•belaughedatB•loseyourlifeC.hurtyourselfD.failintheexperiment解析：选c细节理解题。整篇文章都在告诉我们，如果不遵守

7、安全规则，就有可能受伤。2.Theunderlinedword"observe"inParagraph1means“”•A.obeyB.watchC.noticeD-report解析：选A词义猜測题。根据第一段中的"ifyoudon，twanttohurtyourselforyourlabpartner^^可推断出observe在句中的意思是"遵守"。如果你不想伤害自己或同伴，一定要严格遵守安全规则。3・Havinglonghaircanbedangerouswhenyou•A.rolluplongsle

8、evesB.useanalcohollampC.useasharpinstrumentD.workwithdangerouschemicals解析：选B推理判断题。第五段主要讲的是在实验室用酒精灯时要注意的事项。由此可推断出，长头发在使用酒精灯时可能有危险。4.What'sthebesttitleforthepassage?A.WaystodoexperimentsB•Excitingordangerous?C.Safetyr