首页
试卷库
试题库
当前位置：
X题卡
>
所有题目
>
题目详情
光照：影子；（）。
查看本题答案
包含此试题的试卷
邮件转运员考试《单选》真题及答案
点击查看
你可能感兴趣的试题
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.
热门试题
更多
Hangzhouisfamousasitsbeautifulscenery.
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______.
A HowshouldoneinvestasumofmoneyinthesedaysofinflationLeftinabankitwillhardlykeepitsvaluehoweverhightheinterestrateis.OnlyabravemanoraveryrichonedarestobuyandsellontheStockMarket.Todayitseemsthatoneofthebestwaystoprotectyoursavingsandevenincreaseyourwealthistobuybeautifulobjectsfromthepast.HereIamgoingtooffersomeadviceoncollectingantiqueclockswhichIpersonallyconsiderareamongthemostinterestingofantiques. Isometimeswonderwhatabeingfromanotherplanetmightreportbackaboutourwayoflife.TheplanetEarthisruledbyamysteriouscreaturethatsitsorstandsinaroomandmakesastrangetickingsound.Ithasafacewithtwelveblackmarksandtwohands.Mencandonothingwithoutitspermissionanditfastensitsyoungroundpeople’swristssothateverywheremengotheyarestillunderitscontrol.ThiscreatureistherealmasterofEarthandmenareitsslaves. Whetherornotweareslavesoftimetodaydependsonourcultureandpersonalitybutitisbelievedthatmanyyearsagokingskeptspecialslavestotellthetime.Certainmenwereverycleveratmeasuringthetimeofdayaccordingtothebeatingoftheirownhearts.Theyweremadetostandinafixedplaceandeveryhourorsowouldshoutthetime.Soitseemsthatthefirstclockswerehumanbeings. Howevermenquicklyfoundmoreconvenientandreliablewaysoftellingthetime.Theylearnedtousetheshadowscastbythesun.Theymarkedthehoursoncandlesusedsandinhour-glassesandinventedwater-clocks.Indeedanyseriousstudentofantiquesshouldspendasmuchtimeaspossiblevisitingpalacesstatelyhomesandmuseumstoseesomeofthefinestexamplesofclocksfromthepast. Antiqueclockscouldbeveryexpensivebutoneofthejoysofcollectingclocksisthatitisstillpossibletofindquitecheaponesforyourownhome.AfterallifyouaregoingtoberuledbythetimewhynotinvestinairantiqueclockandperhapsmakeafutureprofitWhichofthefollowingisNOTmentionedasawaytomeasurethetime
Theteachertoldthepupilstostandinarowandnotcalloutloudly.
A HowshouldoneinvestasumofmoneyinthesedaysofinflationLeftinabankitwillhardlykeepitsvaluehoweverhightheinterestrateis.OnlyabravemanoraveryrichonedarestobuyandsellontheStockMarket.Todayitseemsthatoneofthebestwaystoprotectyoursavingsandevenincreaseyourwealthistobuybeautifulobjectsfromthepast.HereIamgoingtooffersomeadviceoncollectingantiqueclockswhichIpersonallyconsiderareamongthemostinterestingofantiques. Isometimeswonderwhatabeingfromanotherplanetmightreportbackaboutourwayoflife.TheplanetEarthisruledbyamysteriouscreaturethatsitsorstandsinaroomandmakesastrangetickingsound.Ithasafacewithtwelveblackmarksandtwohands.Mencandonothingwithoutitspermissionanditfastensitsyoungroundpeople’swristssothateverywheremengotheyarestillunderitscontrol.ThiscreatureistherealmasterofEarthandmenareitsslaves. Whetherornotweareslavesoftimetodaydependsonourcultureandpersonalitybutitisbelievedthatmanyyearsagokingskeptspecialslavestotellthetime.Certainmenwereverycleveratmeasuringthetimeofdayaccordingtothebeatingoftheirownhearts.Theyweremadetostandinafixedplaceandeveryhourorsowouldshoutthetime.Soitseemsthatthefirstclockswerehumanbeings. Howevermenquicklyfoundmoreconvenientandreliablewaysoftellingthetime.Theylearnedtousetheshadowscastbythesun.Theymarkedthehoursoncandlesusedsandinhour-glassesandinventedwater-clocks.Indeedanyseriousstudentofantiquesshouldspendasmuchtimeaspossiblevisitingpalacesstatelyhomesandmuseumstoseesomeofthefinestexamplesofclocksfromthepast. Antiqueclockscouldbeveryexpensivebutoneofthejoysofcollectingclocksisthatitisstillpossibletofindquitecheaponesforyourownhome.AfterallifyouaregoingtoberuledbythetimewhynotinvestinairantiqueclockandperhapsmakeafutureprofitAccordingtothepassagecollectingantiqueclocks
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______.
Familyeducationhasagreat______onchildreninmanyways.
Hereissomebodywhomyouwanttoseehim.
Hardlyhadthethiefseenthepolicemanthanheranaway.
Thesubject______wearegoingtoturnisaboutEnglishstudies.
Isn’ttheTVplaywonderfulThissentencemeans
Ithinkit’stimethatshemakesuphermind.
Uptonownothing______Betty.Iwanttoknowthereason______hehasn’twrittentome.
B Ranch.ItwasnearLosAngelesinCalifornia.AfewyearslaterHollywoodwasoneofthefamousplacesintheworld.Atthebeginningofthe20thcenturytherewasabigfarmcalledHollywood.Fromthe1910’stothe1950’sHollywoodwasthefilmcenteroftheworld. Everyfamilyknewthenamesofitsfilmstars——CharlieChaplinGretaGarboBergmanandhundredsmore. ThereasonwhypeoplewenttoHollywoodtomakefilmswasthesun.AtfirstpeoplemadefilmsinNewYorkontheeastcoastoftheUnitedStates. ButthentheyheardaboutLosAngeleswherethereare350daysofthesuneveryyear.Astheymadeallthefilmsbysunlightthewestcoastwasamuchbetterplacetowork.AlsonearHollywoodyoucanfindmountainsandseaanddesert.Theydidnothavetotravelfartomakeanykindoffilm. WhenTVbecamepopularHollywoodstartedmakingfilmsfortelevision.Theninthe1970’stheydiscoveredpeoplestillwenttothecinematoseebigexpensivefilms.NowadaystheyarestillmakingfilmsinHollywoodandpeopleseethemallovertheworld.PeoplewenttoHollywoodtomakefilmsbecause______.
Thenumberofstudentsareplayingfootballontheplayground.
--______haveyoubeeninGuilin --Threeweeks.
Thenumberofthestamps______limitedsoanumberofpeople______tohavealookatthem.
--Thisdigitalcameraisreallycheap! --The______thebetter.I’mshortofmoneyyousee.
Soyouhavetoleave.Howniceit______ifyou______abitlonger.
People______thenewTVplay.
--Thisdresswaslastyear’sstyle. --Ithinkitstilllooksperfect______ithasgoneoutthisyear.
Itwasanexcitingmomentforthesefootballfansthisyear______forthefirsttimeinyearstheirteamwontheWorldCup.
MymostfavoritesportisbasketballandI’mamemberofourbasketballteam.
Mostpeopleweredeepmovedbythisfilm.
Hewouldratherstayathomethantogooutwithyou.
A HowshouldoneinvestasumofmoneyinthesedaysofinflationLeftinabankitwillhardlykeepitsvaluehoweverhightheinterestrateis.OnlyabravemanoraveryrichonedarestobuyandsellontheStockMarket.Todayitseemsthatoneofthebestwaystoprotectyoursavingsandevenincreaseyourwealthistobuybeautifulobjectsfromthepast.HereIamgoingtooffersomeadviceoncollectingantiqueclockswhichIpersonallyconsiderareamongthemostinterestingofantiques. Isometimeswonderwhatabeingfromanotherplanetmightreportbackaboutourwayoflife.TheplanetEarthisruledbyamysteriouscreaturethatsitsorstandsinaroomandmakesastrangetickingsound.Ithasafacewithtwelveblackmarksandtwohands.Mencandonothingwithoutitspermissionanditfastensitsyoungroundpeople’swristssothateverywheremengotheyarestillunderitscontrol.ThiscreatureistherealmasterofEarthandmenareitsslaves. Whetherornotweareslavesoftimetodaydependsonourcultureandpersonalitybutitisbelievedthatmanyyearsagokingskeptspecialslavestotellthetime.Certainmenwereverycleveratmeasuringthetimeofdayaccordingtothebeatingoftheirownhearts.Theyweremadetostandinafixedplaceandeveryhourorsowouldshoutthetime.Soitseemsthatthefirstclockswerehumanbeings. Howevermenquicklyfoundmoreconvenientandreliablewaysoftellingthetime.Theylearnedtousetheshadowscastbythesun.Theymarkedthehoursoncandlesusedsandinhour-glassesandinventedwater-clocks.Indeedanyseriousstudentofantiquesshouldspendasmuchtimeaspossiblevisitingpalacesstatelyhomesandmuseumstoseesomeofthefinestexamplesofclocksfromthepast. Antiqueclockscouldbeveryexpensivebutoneofthejoysofcollectingclocksisthatitisstillpossibletofindquitecheaponesforyourownhome.AfterallifyouaregoingtoberuledbythetimewhynotinvestinairantiqueclockandperhapsmakeafutureprofitThepurposeofthepassageis______.
Whattheremoteareasneed______educationtochildrenandwhatthechildrenneed______goodtextbooksatthemoment.
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.TheaimofNoah’sArkprojectisto______.
B Ranch.ItwasnearLosAngelesinCalifornia.AfewyearslaterHollywoodwasoneofthefamousplacesintheworld.Atthebeginningofthe20thcenturytherewasabigfarmcalledHollywood.Fromthe1910’stothe1950’sHollywoodwasthefilmcenteroftheworld. Everyfamilyknewthenamesofitsfilmstars——CharlieChaplinGretaGarboBergmanandhundredsmore. ThereasonwhypeoplewenttoHollywoodtomakefilmswasthesun.AtfirstpeoplemadefilmsinNewYorkontheeastcoastoftheUnitedStates. ButthentheyheardaboutLosAngeleswherethereare350daysofthesuneveryyear.Astheymadeallthefilmsbysunlightthewestcoastwasamuchbetterplacetowork.AlsonearHollywoodyoucanfindmountainsandseaanddesert.Theydidnothavetotravelfartomakeanykindoffilm. WhenTVbecamepopularHollywoodstartedmakingfilmsfortelevision.Theninthe1970’stheydiscoveredpeoplestillwenttothecinematoseebigexpensivefilms.NowadaystheyarestillmakingfilmsinHollywoodandpeopleseethemallovertheworld.Inthe1910’sHollywoodbecamea______.
Everyboyandeverygirlknowsthateachdayandeachhourbringstheirduty.
热门题库
更多
邮件转运员考试
邮政业务档案员
邮政投递员考试
商业银行招聘考试
国家银行招聘考试
银行招聘考试(面试部分)
银行招聘考试(综合知识)
事业单位招聘考试
铁塔公司选聘考试
供电公司招聘考试
广播电视报社招聘
中国移动招聘考试
行政处罚考试
公路路政执法考试
森林公安执法考试
城管执法考试
湘公网安备 43130202000226号