首页
试卷库
试题库
当前位置:
X题卡
>
所有题目
>
题目详情
已知:在Rt△ABC中,∠C=90°,如果cos A= ,那么tan B的值为()。
查看本题答案
包含此试题的试卷
信息技术教师招聘考试《单项选择》真题及答案
点击查看
你可能感兴趣的试题
在Rt△ABC中∠C.=90°如果AC=5AB=13那么sinA=__________.
如图RT△ABC中∠ACB=90°AC=4㎝AB=5㎝点D.是AB的中点则cos∠ACD=___.
在Rt△ABC中∠C.=90°已知∠A.=30°b=12求ac及∠B.的大小.
Rt△ABC中已知∠C.=90°∠B.=50°点D.在边BC上BD=2CD图4.把△ABC绕着点D.
已知在Rt△ABC中∠C=90°如果BC=2∠A=α则AC的长为
2sinα
2cosα
2tanα
2cotα
在Rt△ABC中∠C=90°CD是高如果AD=m∠A=α那么BC的长为
m•tanα•cosα
m•cotα•cosα
下列命题①所有锐角三角函数值都为正数②解直角三角形只需已知除直角外的两个元素③Rt△ABC中∠B.=
+cos
2
A.=1;④Rt△ABC中,∠A.=90°,则
.其中真命题的有() A. 1个
2个
3个
4个
1已知Rt△ABC中∠C=90ºAC=BC=2则tanB=2已知sinα·cos30°=则锐角α=度
在Rt△ABC中已知∠C.=90°∠B.=60°BC=3那么AB=
已知在Rt△ABC中∠C.=90°①若a=14b=48则c=________②若a=8c=17则b=
如图Rt△ABC中已知∠C.=90°∠B.=50°点D.在边BC上BD=2CD.将△ABC绕点D.按
已知在Rt△ABC中∠C.=90°BC=6∠A.=60°那么AB=.
如图在Rt△ABC与Rt△DCB中已知∠A.=∠D.=90°请你添加一个条件不添加字母和辅助线使Rt
已知Rt△ABC中∠C.=90°a+b=14cmc=10cm则Rt△ABC的面积等于.
已知如图Rt△ABC≌Rt△ADE∠ABC=∠ADE=90O试以图中标有字母的点为端点连接两条线段如
已知在Rt△ABC中∠C=90°点P.Q.分别在边ABAC上AC=4BC=AQ=3如果△APQ与△A
已知在Rt△ABC中∠C.=90°∠BAC=30°AB=10那么BC=.
已知如图在Rt△ABC中∠C.=90°AC=BCAB=6.如果将△ABC在直线AB上平行移动2个单位
在Rt△ABC中已知∠C.=90°a∶b=3∶4c=10则△ABC的面积为.
12
24
28
30
已知在Rt△ABC中∠C=90°如果BC=2∠A=α则AC的长为
2sinα
2cosα
2tanα
2cotα
热门试题
更多
millionlosegoldsinggofewrealfriendwecare Onsunnydaysyoucanenjoyyourselfonthebeaches.
Hehardlyhadanythingtoeathe
D AnEnglishmannamedPhilShawinventedextremeironingin1997becausehewasboreddoingironingathome. Extremeironingisaspecialkindofoutdoorsport.Itcombines使结合dangerandexcitementwithpracticalironing. WhodoesextremeironingPeopleallovertheworldwholikedangerdoit.Thereareabout1000peoplearoundtheworldwhodoextremeironing.ThereareextremeironingclubsandgroupsinBritainGermanySouthAfricaNewZealandandtheUnitedStates.Youdon’thavetohaveanyspecialqualifications资格证明todoit.Infactanyonecandoit.Howeveritisbettertostartironinginyourbackyard院子beforeyoustarttoironontopofamountain. Thereareofcoursesomerulesinextremeironing.Theironingmustbeoutdoors.Youmusttakeanironanironingboardandsomethingthatyouactuallyirontogetthewrinklesout.Outdoorsincludesfarawayandunusualplacessuchasontopofamountainwhileskiingsnowboardingskydivingorunderwater.Therearenolimits.Themoreunusualthebetter.Howeveryoushouldplancarefullybecauseweatherconditionscansuddenlychangeonmountainsforexample.Youshouldnotdoextremeironingonyourown. WhatkindofthingsshouldyouhaveYourmusthavearealiron.Travelironsareacceptable.Youmustnotuseplasticortoyirons.Theclothesyouironmustheatleastthesizeofahandtowel.Itshouldn’tbejustahandkerchief.Theboarddoesn’thavetobeafull-sizeboardbutthatispreferred.Itmustbeonemeterlongandthirtycentimeterswideandhavelegs.Youmustalsohaveproof证据ofironingthatiseitheraphotooravideoanditshouldshowarecognizablelandmark.Beaware意识thatpeoplehavealreadyironednearthetopofEverestthehighestmountainintheworldandintheBlueHoleinEgyptoneofthemostdangerousplacestodive.Howevertherearestillmanyrecordstobreak.Ironon! Howdoextremeironersfeelwhentheydothesport
millionlosegoldsinggofewrealfriendwecare —ExcusemeI’vegothere.Couldyouhelpme—Sorry.I’mastrangerheremyself.
B UncleLiandUncleWangaregoodfriends.Theylivenexttoeachotherandtheirfarmsarebothatthefootofthemountain.Sotheycanhelpeachother.Butneitherofthemlikestousehishead.They’rebothpoorthoughtheyworkhard.Mostvillagershavebuiltnewhousesbuttheystillliveinthelowandbrokenhouses.Theyneverfindoutwhy. OnceUncleLiwenttothetowntobuysomemedicineforhiswife.Inthetownheheardtheapplesinacitywereexpensive.HetoldUncleWangaboutitassoonashewentback.Theydecidedtocarrysomeapplestothecity.Theyborrowedsomemoneyfromtheirfriendsandboughtnearly1000kilogramsofapplesinthevillagesandcarriedthemtothecityonatractor.Badluck!Alotofappleshasalreadybeencarriedtherewhentheyarrived.Afewdayslatertheyhadtosellthematalowprice.Theyfeltunhappyandreturnedtotheirvillage. "Ican’tunderstandwhywesustained蒙受lossesinbusinesswhileothersalwaysprofit赢利"UncleLiaskedoneday. "Thetractorwastoosmall"UncleWangsaidwithoutthinking."We’llcarrymoreapplesonatrucknexttime!" "Iagree!"saidUncleLi."Howfoolishwewere!/ thetwofarmershadtoselltheirapplesatalowpricebecause.
It'sgoodfoodthatwealllikeitverymuch.
B UncleLiandUncleWangaregoodfriends.Theylivenexttoeachotherandtheirfarmsarebothatthefootofthemountain.Sotheycanhelpeachother.Butneitherofthemlikestousehishead.They’rebothpoorthoughtheyworkhard.Mostvillagershavebuiltnewhousesbuttheystillliveinthelowandbrokenhouses.Theyneverfindoutwhy. OnceUncleLiwenttothetowntobuysomemedicineforhiswife.Inthetownheheardtheapplesinacitywereexpensive.HetoldUncleWangaboutitassoonashewentback.Theydecidedtocarrysomeapplestothecity.Theyborrowedsomemoneyfromtheirfriendsandboughtnearly1000kilogramsofapplesinthevillagesandcarriedthemtothecityonatractor.Badluck!Alotofappleshasalreadybeencarriedtherewhentheyarrived.Afewdayslatertheyhadtosellthematalowprice.Theyfeltunhappyandreturnedtotheirvillage. "Ican’tunderstandwhywesustained蒙受lossesinbusinesswhileothersalwaysprofit赢利"UncleLiaskedoneday. "Thetractorwastoosmall"UncleWangsaidwithoutthinking."We’llcarrymoreapplesonatrucknexttime!" "Iagree!"saidUncleLi."Howfoolishwewere!/ UncleLiandUncleWangliveinthelowandbrokenhousesbecause.
C Afamousteacherwasspeakingtothestudentsatourschool.Hebeganhislessonbyholdingupa$100bill.Thenhesaidtothethreehundredstudents"Whowouldlikethis$100bill"Thestudentsbegantoputuptheirhandsatonce. Thenhesaid"Iamgoingtogivethis$100tooneofyoubutfirstletmedothis."Hethenmadethebillintoaball.Thenhesaid"Whowantsitnow"Thehandswentbackintotheair. "Well"hesaid"WhatifIdothis"andhedroppeditonthefloorandsteppedonit.Hepickedupthedirtycrumpledbillandsaid"Whostillwantsit"Handswentbackintotheair. "Myfriends"hesaid"youhavelearnedavaluablelessontoday.Nomatter无论whatIdidtothemoneyyoustillwanteditbecauseitdidnotgodowninvalue价值.Itwasstillworth$100!" Manytimesinourliveswearedroppedcrumpledandsteppedonbythechanceswetakeandthethingsthathappentous.Wefeelasifweareworthnothing.Butremembernomatterwhathashappenedtoyonyouwillneverloseyourvalue:youarealwaysvaluabletothosepeoplewholoveyou.Yourvaluedoesn’tcomefromwhatyoudoorwhomyouknowhutWHOYOUARE. Youarespecialandvaluable.Don’teverforgetit! Wearealwaysvaluabletothepeople.
—HiJanewouldyouliketogohikingwithmeonSunday—.Ihavetoomuchhomework.
millionlosegoldsinggofewrealfriendwecare TomislookingforwardtoChinabecausehelikesChineseculture.
millionlosegoldsinggofewrealfriendwecareWhencrossingtheroadwemustbe______.
—Whenshallwemeetagainnextweek—dayispossible.It'snoproblemwithme.
ELongagotherelivedinthemountainsasmalldragonnamedMarvin.LikealltheotherdragonsMarvinhadhardskinalongtailwingsforflyingandabreathoffire.HoweverMarvinwasdifferentfromtheothers.Hewasfriendlylikeadogandsmartlikeanelephant.ThreelargedragonsBordBrunandBargdelightedinscaringandteasing戏弄theotheranimalsonthemountain.OnedayagoatgotlostandcametoaplacewhereBordBrunandBargweresitting.Thedragonssurroundedthegoatandbegantoteaseit.Theybreathedfireatitandburneditswool.Theyhititwiththeirlongtails.Thescaredgoatwasdesperate拼命togetawayfromthethreelargedragons.Marvinwasflyingoverhead.Hesawwhatthedragonsweredoingandlandedonacliffabovethem.Excuseme!Marvinshoutedclowntothedragons.WhichofyouisthestrongestdragonTheoldmanwithmagicalpowerswholivesontheothersideofthemountainwantstofindthestrongestdragonansweredMarvin.SowhichofyouisthestrongestIam!ShoutedBordandheliftedupahugerockoverhishead.Heswayedundertheweightoftherockbuthelditstrong.Iam!ShoutedBrunandhegrabbedthetopsoftwotrees.Hebentthemtowardseachothersothetopstouchedandheldthemstrong.Iam!shoutedBargandhedrankallthewateroutofthemountainlake.Hisstomachswelledlikeaballoonbutheheldthewaterstrong.AsthethreedragonsshowedtheirstrengthMarvinflewdowntothegoatandgentlypickeditup.ComenowsmalloneMarvinsaidtothegoat.Letusgoquicklytotheoldmanandtellhimthatwehavefoundthethreestrongestdragonsinalltheland!/Formwhatpointofview角度isthestorytold
学习的主体因素指
按照学习迁移内容的抽象与概括化水平进行划分学习迁移可以分为
LeiFengistheofallthepeopleinChin
E LongagotherelivedinthemountainsasmalldragonnamedMarvin.LikealltheotherdragonsMarvinhadhardskinalongtailwingsforflyingandabreathoffire.HoweverMarvinwasdifferentfromtheothers.Hewasfriendlylikeadogandsmartlikeanelephant. ThreelargedragonsBordBrunandBargdelightedinscaringandteasing戏弄theotheranimalsonthemountain.OnedayagoatgotlostandcametoaplacewhereBordBrunandBargweresitting.Thedragonssurroundedthegoatandbegantoteaseit.Theybreathedfireatitandburneditswool.Theyhititwiththeirlongtails.Thescaredgoatwasdesperate拼命togetawayfromthethreelargedragons. Marvinwasflyingoverhead.Hesawwhatthedragonsweredoingandlandedonacliffabovethem."Excuseme!"Marvinshoutedclowntothedragons."Whichofyouisthestrongestdragon" "Theoldmanwithmagicalpowerswholivesontheothersideofthemountainwantstofindthestrongestdragon"answeredMarvin."Sowhichofyouisthestrongest" "Iam!"ShoutedBordandheliftedupahugerockoverhishead.Heswayedundertheweightoftherockbuthelditstrong. "Iam!"ShoutedBrunandhegrabbedthetopsoftwotrees.Hebentthemtowardseachothersothetopstouchedandheldthemstrong. "Iam!"shoutedBargandhedrankallthewateroutofthemountainlake.Hisstomachswelledlikeaballoonbutheheldthewaterstrong. AsthethreedragonsshowedtheirstrengthMarvinflewdowntothegoatandgentlypickeditup."Comenowsmallone"Marvinsaidtothegoat."Letusgoquicklytotheoldmanandtellhimthatwehavefoundthethreestrongestdragonsinalltheland!/ Theprobleminthisstorywasthat.
A LittleTommywasdoingverybadlyinmath.Hisparentshadtriedeverything—tutors家庭教师cardsspeciallearningcenters—inshorteverythingtheycouldthinkof.FinallytheytookTommytoacatholictiān zhǔ jiāo school. AfterthefirstdaylittleTommycamehomewithaveryseriouslookonhisface.Hedidn’tkisshismotherandsayhello.Insteadhewentstraighttohisroomandstartedstudying.Booksandpaperswerespread铺开outallovertheroomandlittleTommywashardatwork.Hismotherwassurprised.Shecalledhimdowntodinnerandassoonashefinishedeatinghewentbacktohisroomwithoutaword.Innotimehewasbackhittingthebooksashardasbefore.Thiswentonforsometimedayafterdaywhilethemothertriedtounderstandwhatwashappening. FinallylittleTommybroughthomehisreportcard.Hequietlyputitonthetableandwentuptohisroomandhitthebooks.HisroomlookedatitandtohersurpriselittleTommygotanAinmath.Shecouldnolongerholdhercuriosity好奇心.Shewenttohisroomandasked"SonwhatwasitWasitthenuns修女" LittleTommylookedatherandshookhishead"No." "Wellthen"sheaskedagain."WHATwasit" LittleTommylookedatherandsaid"WellonthefirstdayofschoolwhenIsawthatmannailed钉totheplussign加号Iknewtheyweren’tjoking./ Tommy’smotherfeltsurprisedthathisson.
DAnEnglishmannamedPhilShawinventedextremeironingin1997becausehewasboreddoingironingathome.Extremeironingisaspecialkindofoutdoorsport.Itcombines使结合dangerandexcitementwithpracticalironing.WhodoesextremeironingPeopleallovertheworldwholikedangerdoit.Thereareabout1000peoplearoundtheworldwhodoextremeironing.ThereareextremeironingclubsandgroupsinBritainGermanySouthAfricaNewZealandandtheUnitedStates.Youdon’thavetohaveanyspecialqualifications资格证明todoit.Infactanyonecandoit.Howeveritisbettertostartironinginyourbackyard院子beforeyoustarttoironontopofamountain.Thereareofcoursesomerulesinextremeironing.Theironingmustbeoutdoors.Youmusttakeanironanironingboardandsomethingthatyouactuallyirontogetthewrinklesout.Outdoorsincludesfarawayandunusualplacessuchasontopofamountainwhileskiingsnowboardingskydivingorunderwater.Therearenolimits.Themoreunusualthebetter.Howeveryoushouldplancarefullybecauseweatherconditionscansuddenlychangeonmountainsforexample.Youshouldnotdoextremeironingonyourown.WhatkindofthingsshouldyouhaveYourmusthavearealiron.Travelironsareacceptable.Youmustnotuseplasticortoyirons.Theclothesyouironmustheatleastthesizeofahandtowel.Itshouldn’tbejustahandkerchief.Theboarddoesn’thavetobeafull-sizeboardbutthatispreferred.Itmustbeonemeterlongandthirtycentimeterswideandhavelegs.Youmustalsohaveproof证据ofironingthatiseitheraphotooravideoanditshouldshowarecognizablelandmark.Beaware意识thatpeoplehavealreadyironednearthetopofEverestthehighestmountainintheworldandintheBlueHoleinEgyptoneofthemostdangerousplacestodive.Howevertherearestillmanyrecordstobreak.Ironon!WheredidPhilShawusuallydoironingbefore19977
DAnEnglishmannamedPhilShawinventedextremeironingin1997becausehewasboreddoingironingathome.Extremeironingisaspecialkindofoutdoorsport.Itcombines使结合dangerandexcitementwithpracticalironing.WhodoesextremeironingPeopleallovertheworldwholikedangerdoit.Thereareabout1000peoplearoundtheworldwhodoextremeironing.ThereareextremeironingclubsandgroupsinBritainGermanySouthAfricaNewZealandandtheUnitedStates.Youdon’thavetohaveanyspecialqualifications资格证明todoit.Infactanyonecandoit.Howeveritisbettertostartironinginyourbackyard院子beforeyoustarttoironontopofamountain.Thereareofcoursesomerulesinextremeironing.Theironingmustbeoutdoors.Youmusttakeanironanironingboardandsomethingthatyouactuallyirontogetthewrinklesout.Outdoorsincludesfarawayandunusualplacessuchasontopofamountainwhileskiingsnowboardingskydivingorunderwater.Therearenolimits.Themoreunusualthebetter.Howeveryoushouldplancarefullybecauseweatherconditionscansuddenlychangeonmountainsforexample.Youshouldnotdoextremeironingonyourown.WhatkindofthingsshouldyouhaveYourmusthavearealiron.Travelironsareacceptable.Youmustnotuseplasticortoyirons.Theclothesyouironmustheatleastthesizeofahandtowel.Itshouldn’tbejustahandkerchief.Theboarddoesn’thavetobeafull-sizeboardbutthatispreferred.Itmustbeonemeterlongandthirtycentimeterswideandhavelegs.Youmustalsohaveproof证据ofironingthatiseitheraphotooravideoanditshouldshowarecognizablelandmark.Beaware意识thatpeoplehavealreadyironednearthetopofEverestthehighestmountainintheworldandintheBlueHoleinEgyptoneofthemostdangerousplacestodive.Howevertherearestillmanyrecordstobreak.Ironon!WhichisNOTnecessaryforextremeironing
millionlosegoldsinggofewrealfriendwecare The19thWorldCupisattractingoffootballfansallovertheworld.
我已下决心要当一名演员
1868年俄罗斯心理学家乌申斯基出版了对当时的心理学发展成果进行结他因此被称为俄罗斯教育心理学的奠基人
保持校园整洁是我们大家的责任
标准化成绩测验
A LittleTommywasdoingverybadlyinmath.Hisparentshadtriedeverything—tutors家庭教师cardsspeciallearningcenters—inshorteverythingtheycouldthinkof.FinallytheytookTommytoacatholictiān zhǔ jiāo school. AfterthefirstdaylittleTommycamehomewithaveryseriouslookonhisface.Hedidn’tkisshismotherandsayhello.Insteadhewentstraighttohisroomandstartedstudying.Booksandpaperswerespread铺开outallovertheroomandlittleTommywashardatwork.Hismotherwassurprised.Shecalledhimdowntodinnerandassoonashefinishedeatinghewentbacktohisroomwithoutaword.Innotimehewasbackhittingthebooksashardasbefore.Thiswentonforsometimedayafterdaywhilethemothertriedtounderstandwhatwashappening. FinallylittleTommybroughthomehisreportcard.Hequietlyputitonthetableandwentuptohisroomandhitthebooks.HisroomlookedatitandtohersurpriselittleTommygotanAinmath.Shecouldnolongerholdhercuriosity好奇心.Shewenttohisroomandasked"SonwhatwasitWasitthenuns修女" LittleTommylookedatherandshookhishead"No." "Wellthen"sheaskedagain."WHATwasit" LittleTommylookedatherandsaid"WellonthefirstdayofschoolwhenIsawthatmannailed钉totheplussign加号Iknewtheyweren’tjoking./ Thelastsentenceinthepassageshowsthat.
—SusanIwon'tbebackfordinnerthisevening.—Don'tworryMomIcantakecareof.
BUncleLiandUncleWangaregoodfriends.Theylivenexttoeachotherandtheirfarmsarebothatthefootofthemountain.Sotheycanhelpeachother.Butneitherofthemlikestousehishead.They’rebothpoorthoughtheyworkhard.Mostvillagershavebuiltnewhousesbuttheystillliveinthelowandbrokenhouses.Theyneverfindoutwhy.OnceUncleLiwenttothetowntobuysomemedicineforhiswife.Inthetownheheardtheapplesinacitywereexpensive.HetoldUncleWangaboutitassoonashewentback.Theydecidedtocarrysomeapplestothecity.Theyborrowedsomemoneyfromtheirfriendsandboughtnearly1000kilogramsofapplesinthevillagesandcarriedthemtothecityonatractor.Badluck!Alotofappleshasalreadybeencarriedtherewhentheyarrived.Afewdayslatertheyhadtosellthematalowprice.Theyfeltunhappyandreturnedtotheirvillage.Ican’tunderstandwhywesustained蒙受lossesinbusinesswhileothersalwaysprofit赢利UncleLiaskedoneday.ThetractorwastoosmallUncleWangsaidwithoutthinking.We’llcarrymoreapplesonatrucknexttime!Iagree!saidUncleLi.Howfoolishwewere!/WhichofthefollowingisTRUE
C Afamousteacherwasspeakingtothestudentsatourschool.Hebeganhislessonbyholdingupa$100bill.Thenhesaidtothethreehundredstudents"Whowouldlikethis$100bill"Thestudentsbegantoputuptheirhandsatonce. Thenhesaid"Iamgoingtogivethis$100tooneofyoubutfirstletmedothis."Hethenmadethebillintoaball.Thenhesaid"Whowantsitnow"Thehandswentbackintotheair. "Well"hesaid"WhatifIdothis"andhedroppeditonthefloorandsteppedonit.Hepickedupthedirtycrumpledbillandsaid"Whostillwantsit"Handswentbackintotheair. "Myfriends"hesaid"youhavelearnedavaluablelessontoday.Nomatter无论whatIdidtothemoneyyoustillwanteditbecauseitdidnotgodowninvalue价值.Itwasstillworth$100!" Manytimesinourliveswearedroppedcrumpledandsteppedonbythechanceswetakeandthethingsthathappentous.Wefeelasifweareworthnothing.Butremembernomatterwhathashappenedtoyonyouwillneverloseyourvalue:youarealwaysvaluabletothosepeoplewholoveyou.Yourvaluedoesn’tcomefromwhatyoudoorwhomyouknowhutWHOYOUARE. Youarespecialandvaluable.Don’teverforgetit! ThesentenceHandswentbackintotheairmeans.
你一到广州就给我打个电话好吗
热门题库
更多
信息技术教师招聘考试
音乐教师招聘考试
邮政银行招聘考试
邮政营业员考试
邮政小额贷款信贷员考试
邮政通信信息业务员考试
集邮业务员考试
快递业务员考试
邮政储汇业务员考试
邮政代理金融业务网点考试
邮件分拣员考试
机要业务员考试
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