高三复习：英语阅读理解练习（49）

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1、高三复习：英语阅读理解练习（49）　　TodayI’llbetalkingabouttheinventionofthecameraandphotography.Thecameraisoftenthoughttobeamoderninvention,butasearlyas1727,aGermanphysicistdiscoveredthatlightdarkenssilversalt.Usedasacamera,abigboxwassetup,andasmallholewascutinonesidetolettheligh

2、tin;hemadetemporarypicturesonthesalt.Silversaltisstillthebaseofthephotographicfilmtoday.ThenaFrenchscientistmadethefirstpermanentpicturebyusingaspecialpieceofmetalwhichwascoveredwithsilversalt.Aphotographhemadein1826stillexists.　　ThepainterDeGearimprovedtheprocess

3、bycoveringthemetalalsowithplacingthecommonsaltwhichwecaneat.Thiswasin1839,theofficialdateofbeginningofphotographs.Buttheproblemwastheprintingofthephotographs.Anditwasn’tuntilotherscientistsdevelopedthekindofphotographicpaperwenowusethatgoodprintswerepossibleandpho

4、tographybecametrulymodern.Inthe1870’s,MatthewBradeywasabletotakehisfamouspicturesinAmericanCivilWar.Inthe20’softhiscentury,GeorgesMannoftheUnitedStatessimplifiedfilmdeveloping，andDrEdwardLaneinventedtheso—called‘InstantCamera’whichusesself—developingfilm.Ifwesayph

5、otographycameintoexistencein1839,itfollowsthatittookmorethan100yearsforthecameratoreachitspresentconditionoftechnicalrefinement。　　1.Whatdiscoverywasthebasisofphotography?　　A.Lightdarkenssilversalt.B.Lightdarkensnaturalsalt.　　C.Lightdarkenssilver.D.Lightdarkensself

6、--developingfilm　　2.Howwasthefirstpermanentpicturemade?　　A.Bymakinguseofspecialpaper.B.Byaddingcommonsalttosilversalt.　　C.Bygivingaslightcolourtothesilversalt.D.Byusingaspecialpieceofmetal.　　3.Whatdoesthespeakerregardastheofficialdateofbeginningofphotography?　　A.1

7、727B.1826C.1839D.1870　　4.AccordingtothespeakerwhyisMatthewBradeyrememberedtoday?　　A.Hewasasoldier.B.Hetookwarphotographs.　　C.Hepaintedportraits.D.Hedesignedaportablecamera.　　5.WhatdidDoctorEdwardLaneinvent?　　A.Acheapprocessofdevelopingfilmathome.　　B.Anewkindoffilm

8、.　　C.Anautomaticprinter.　　D.An‘instantcamera’thatdevelopsitsownfilm.