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光照：影子；（）。
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用灯光或日光照射物体在地面或墙面上就会产生影子这种现象就叫__________.
在阳光照射下的升旗广场的旗杆从上午九点到十一点的影子长的变化规律为
逐渐变长
逐渐变短
影子长度不变
影子长短变化无规律
下列说法正确的是
物体在阳光下的投影只与物体的高度有关
小明的个子比小亮高，我们可以肯定，不论什么情况，小明的影子一定比小亮的影子长.
物体在阳光照射下，不同时刻，影长可能发生变化，方向也可能发生变化.
物体在阳光照射下，影子的长度和方向都是固定不变的.
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--Thisdresswaslastyear’sstyle. --Ithinkitstilllooksperfect______ithasgoneoutthisyear.
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C Withonlyabout1000pandasleftintheworldChinaisdesperatelytryingtoclonetheanimalandsavetheendangeredspecies.That’samovesimilartowhataTexasA&MUniversityresearcherhasbeenundertakingforthepastfiveyearsinaprojectcalledNoah’sArk. Dr.DuaneKraemeraprofessorinTexasA&M’sCollegeofVeterinaryMedicineandapioneerinembryo胚胎transferworkandrelatedproceduressayshesalutestheChineseeffortandIwishthemallthebestsuccesspossible.It’saworthwhileprojectcertainlynotaneasyoneandit’sverymuchlikewhatwe’reattemptinghereatTexasA&M--tosaveanimalsfromextinction. Noah’sArkisaimedatcollectingeggsembryossemen精子andDNAofendangeredanimalsandstoringtheminliquidnitrogen.IfcertainspeciesshouldbecomeextinctKraemersaystherewouldbeenoughofthebasicbuildingblockstoreintroducethespeciesinthefuture. Itisestimatedthatasmanyas2000speciesofmammalsbirdsandreptileswillbecomeextinctoverthenext100years.ThepandanativeonlytoChinaisindangerofbecomingextinctinthenext25years. ThisweekChinesescientistssaidtheygrewanembryobyintroducingcellsfromadeadfemalepandaintotheeggcellsofaJapanesewhiterabbit.Theyarenowtryingtoimplanttheembryointoahostanimal. Theentireprocedurecouldtakefromthreetofiveyearstocomplete. ThenucleartransferofonespeciestoanotherisnoteasyandthelackofavailablepandaeggscouldbeamajorproblemKraemerbelieves.Theywillprobablyhavetodoseveralhundredtransferstoresultinonepregnancy.Ittakesalongtimeandit’sdifficultbutthiscouldbegroundbreakingscienceifitworks.TheyarecertainlynotputtinganylivepandasatrisksoitisworththeeffortaddsKraemerwhoisoneoftheleadersoftheMissyplicityProjectatTexasA&Mthefirsteverattemptatcloningadog. Theyaretryingtodosomethingthat’sneverbeendoneandthisisverysimilartoourworkinNoah’sArk.We’rebothtryingtosaveanimalsthatfaceextinction.Icertainlyapplaudtheireffortandthere’salotwecanlearnfromwhattheyareattemptingtodo.It’saresearchthatisverymuchneeded.ThewordgroundbreakingParagraph7canbeinterpretedas______.
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B Ranch.ItwasnearLosAngelesinCalifornia.AfewyearslaterHollywoodwasoneofthefamousplacesintheworld.Atthebeginningofthe20thcenturytherewasabigfarmcalledHollywood.Fromthe1910’stothe1950’sHollywoodwasthefilmcenteroftheworld. Everyfamilyknewthenamesofitsfilmstars——CharlieChaplinGretaGarboBergmanandhundredsmore. ThereasonwhypeoplewenttoHollywoodtomakefilmswasthesun.AtfirstpeoplemadefilmsinNewYorkontheeastcoastoftheUnitedStates. ButthentheyheardaboutLosAngeleswherethereare350daysofthesuneveryyear.Astheymadeallthefilmsbysunlightthewestcoastwasamuchbetterplacetowork.AlsonearHollywoodyoucanfindmountainsandseaanddesert.Theydidnothavetotravelfartomakeanykindoffilm. WhenTVbecamepopularHollywoodstartedmakingfilmsfortelevision.Theninthe1970’stheydiscoveredpeoplestillwenttothecinematoseebigexpensivefilms.NowadaystheyarestillmakingfilmsinHollywoodandpeopleseethemallovertheworld.Inthe1910’sHollywoodbecamea______.
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Whattheremoteareasneed______educationtochildrenandwhatthechildrenneed______goodtextbooksatthemoment.
Thesubject______wearegoingtoturnisaboutEnglishstudies.
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Mostpeopleweredeepmovedbythisfilm.
Hangzhouisfamousasitsbeautifulscenery.
Theteachertoldthepupilstostandinarowandnotcalloutloudly.
C Withonlyabout1000pandasleftintheworldChinaisdesperatelytryingtoclonetheanimalandsavetheendangeredspecies.That’samovesimilartowhataTexasA&MUniversityresearcherhasbeenundertakingforthepastfiveyearsinaprojectcalledNoah’sArk. Dr.DuaneKraemeraprofessorinTexasA&M’sCollegeofVeterinaryMedicineandapioneerinembryo胚胎transferworkandrelatedproceduressayshesalutestheChineseeffortandIwishthemallthebestsuccesspossible.It’saworthwhileprojectcertainlynotaneasyoneandit’sverymuchlikewhatwe’reattemptinghereatTexasA&M--tosaveanimalsfromextinction. Noah’sArkisaimedatcollectingeggsembryossemen精子andDNAofendangeredanimalsandstoringtheminliquidnitrogen.IfcertainspeciesshouldbecomeextinctKraemersaystherewouldbeenoughofthebasicbuildingblockstoreintroducethespeciesinthefuture. Itisestimatedthatasmanyas2000speciesofmammalsbirdsandreptileswillbecomeextinctoverthenext100years.ThepandanativeonlytoChinaisindangerofbecomingextinctinthenext25years. ThisweekChinesescientistssaidtheygrewanembryobyintroducingcellsfromadeadfemalepandaintotheeggcellsofaJapanesewhiterabbit.Theyarenowtryingtoimplanttheembryointoahostanimal. Theentireprocedurecouldtakefromthreetofiveyearstocomplete. ThenucleartransferofonespeciestoanotherisnoteasyandthelackofavailablepandaeggscouldbeamajorproblemKraemerbelieves.Theywillprobablyhavetodoseveralhundredtransferstoresultinonepregnancy.Ittakesalongtimeandit’sdifficultbutthiscouldbegroundbreakingscienceifitworks.TheyarecertainlynotputtinganylivepandasatrisksoitisworththeeffortaddsKraemerwhoisoneoftheleadersoftheMissyplicityProjectatTexasA&Mthefirsteverattemptatcloningadog. Theyaretryingtodosomethingthat’sneverbeendoneandthisisverysimilartoourworkinNoah’sArk.We’rebothtryingtosaveanimalsthatfaceextinction.Icertainlyapplaudtheireffortandthere’salotwecanlearnfromwhattheyareattemptingtodo.It’saresearchthatisverymuchneeded.Thebesttitleforthepassagemaybe______.
Ithinkit’stimethatshemakesuphermind.
Everyboyandeverygirlknowsthateachdayandeachhourbringstheirduty.
A HowshouldoneinvestasumofmoneyinthesedaysofinflationLeftinabankitwillhardlykeepitsvaluehoweverhightheinterestrateis.OnlyabravemanoraveryrichonedarestobuyandsellontheStockMarket.Todayitseemsthatoneofthebestwaystoprotectyoursavingsandevenincreaseyourwealthistobuybeautifulobjectsfromthepast.HereIamgoingtooffersomeadviceoncollectingantiqueclockswhichIpersonallyconsiderareamongthemostinterestingofantiques. Isometimeswonderwhatabeingfromanotherplanetmightreportbackaboutourwayoflife.TheplanetEarthisruledbyamysteriouscreaturethatsitsorstandsinaroomandmakesastrangetickingsound.Ithasafacewithtwelveblackmarksandtwohands.Mencandonothingwithoutitspermissionanditfastensitsyoungroundpeople’swristssothateverywheremengotheyarestillunderitscontrol.ThiscreatureistherealmasterofEarthandmenareitsslaves. Whetherornotweareslavesoftimetodaydependsonourcultureandpersonalitybutitisbelievedthatmanyyearsagokingskeptspecialslavestotellthetime.Certainmenwereverycleveratmeasuringthetimeofdayaccordingtothebeatingoftheirownhearts.Theyweremadetostandinafixedplaceandeveryhourorsowouldshoutthetime.Soitseemsthatthefirstclockswerehumanbeings. Howevermenquicklyfoundmoreconvenientandreliablewaysoftellingthetime.Theylearnedtousetheshadowscastbythesun.Theymarkedthehoursoncandlesusedsandinhour-glassesandinventedwater-clocks.Indeedanyseriousstudentofantiquesshouldspendasmuchtimeaspossiblevisitingpalacesstatelyhomesandmuseumstoseesomeofthefinestexamplesofclocksfromthepast. Antiqueclockscouldbeveryexpensivebutoneofthejoysofcollectingclocksisthatitisstillpossibletofindquitecheaponesforyourownhome.AfterallifyouaregoingtoberuledbythetimewhynotinvestinairantiqueclockandperhapsmakeafutureprofitWhichofthefollowingisNOTmentionedasawaytomeasurethetime
Thenumberofstudentsareplayingfootballontheplayground.
Hereissomebodywhomyouwanttoseehim.
B Ranch.ItwasnearLosAngelesinCalifornia.AfewyearslaterHollywoodwasoneofthefamousplacesintheworld.Atthebeginningofthe20thcenturytherewasabigfarmcalledHollywood.Fromthe1910’stothe1950’sHollywoodwasthefilmcenteroftheworld. Everyfamilyknewthenamesofitsfilmstars——CharlieChaplinGretaGarboBergmanandhundredsmore. ThereasonwhypeoplewenttoHollywoodtomakefilmswasthesun.AtfirstpeoplemadefilmsinNewYorkontheeastcoastoftheUnitedStates. ButthentheyheardaboutLosAngeleswherethereare350daysofthesuneveryyear.Astheymadeallthefilmsbysunlightthewestcoastwasamuchbetterplacetowork.AlsonearHollywoodyoucanfindmountainsandseaanddesert.Theydidnothavetotravelfartomakeanykindoffilm. WhenTVbecamepopularHollywoodstartedmakingfilmsfortelevision.Theninthe1970’stheydiscoveredpeoplestillwenttothecinematoseebigexpensivefilms.NowadaystheyarestillmakingfilmsinHollywoodandpeopleseethemallovertheworld.PeoplewenttoHollywoodtomakefilmsbecause______.
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