高三复习:英语阅读理解练习(49)

高三复习:英语阅读理解练习(49)

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时间:2018-10-18

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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.

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