Digitalcamera(数码相机)Thenewlyinventeddigitalcameraisfascinating:youcantakepictureswithoutfilm.YoucantransferandexhibityourpicturegloballyinafewsecondsthroughtheInternet.Theimagestoredinaharddrivewillneverwearoutlikethetraditionalphotos.Digitalcamerasalsosatisfytheimpatientphotographerbyallowingthemtoviewtheirmasterpieceinrealtime.Unliketheimagesoftraditionalcamerasformedbychemicalreaction,thedigitalcameraworksasanimagedigitizeritself.It'smadeofCCD(chargecoupleddevice),asmallgridoftinylightsensitivecells.Whenstruckbylight,eachcellsendsoutanelectricalsignalwhosewaveformcharacteristicsvarydependingontheintensity(强度)oflight.Thesignalfromeachcellischangedintoadigitalvalueandstoredinthecamera'smemoryoronanelectronicstoragemedium.A“picture”isreducedtoaverylonglistofnumberswaitingtobeconvertedbackintovisual(视力的；视觉的)form.Processedthroughacomputer,eachvaluebecomesapixel(像素);pixelsarereassembled(重装)intheoriginalgridpatternanddisplayedorprinted.Theimageresolution(分辨率)ofadigitalcameradependsontheCCD.MorecellsontheCCDmeanmorepixelsontheimage,whichgivesgreaterdetailandhigherimageresolution.Theearlydigitalcamerahadresolutiononlyupto400pixelsperimage,costseveralthousanddollars,andwasmainlyforbusinessuse.Nowtherearechoicesforconsumersindifferentpriceranges.Thevarietyofdigitalcamerashasamazedfirstadapterstobuytheproducts.Thedigitalcameratechnologyismovingveryfast.Afewmonthsago,mostofthedigitalcameraswereequippedwithfocuslensesatreasonableprices.Withalltheseinventionsandtechnologyadvancements,thefutureofdigitalcameraisbright,anddigitalcamerasmayeventuallyreplacetraditionalcameras.Questions：1.Thesecondparagraphmainlytalksabout____.A.howadigitalcameraworksB.whatapixelisinadigitalcameraC.whatanelectronicstoragemediumisD.howatraditionalcameradiffersfromadigitalcamera2.Whichadvantageofthedigitalcameraisnotmentioned?A.Theyareequippedwithautofocuslenses.B.Theycanbeusedwithoutfilm.C.Thepricesareacceptable.D.Theyareeasytocarry.3.Theunderlinedword“adapters”probablymeans_______.A.thingswhichareconsideredfashionableB.peoplewholiketotrynewinventionsC.thingswhicharedesignedforpurposesD.peoplewholiketotakephotos4.Wecanlearnfromthepassagethat____.A.lightsensitivecellsdecidethequalityofpicturesB.lightsensitivecellsdecidetheintensityoflightsignalsC.traditionalcameraswilleventuallydisappearinthefutureD.printedpicturestakenbydigitalcameraswillneverwearout.答案1.A2.D3.B4.APeriodOneIntroduction&VocabularyandReadingⅠ.单词识记1.____adj.数码的；数字式的2.____adv.经常地；总是3.____adj.给人深刻印象的4.____adj.非盈利的5.____adv.明智地，合理地6.bowlingn.____7.certificatedadj.____8.virtualadj.____答案1.digital2.constantly3.impressive4.nonprofit5.sensibly6.保龄球运动7.持有职业培训证书的；有执业资格的8.(通过计算机软件)模拟的，虚拟的Ⅱ.短语天地1.________保持势头，没有停滞不前2.________想象；梦想3.________烧毁4.________闹着玩儿地5.________预先；事先；提前6.turnaway________7.havenothingtodowith________8.stayawayfrom________9.runawayfrom________10.warnsbofsth________答案1.neverlookback2.dreamof3.burndown4.forfun5.inadvance6.不理睬，拒绝7.与……无关8.离开；不在家；外出9.从……逃出；从……逃跑10.提醒/警告某人某事Ⅲ.句型搜索1.Butlook_a_little_closer_and_you_will_seethatthisSenior3computerexperthassomeimpressiveinternationalconnections.[信息提取]句中的lookalittlecloserandyou'llsee...为祈使句＋and＋句子结...