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教案备课库《》真题及答案
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解方程x2-4x-7=0用公式法求解
如图△ABC中AB=ACAD⊥BC于点DDE⊥AC于点ECF⊥AB于点F．1求证△BCF∽△CDE2若DE=3求CF的长．
如图23-7-12菱形ABCD的边长为1直线l过点C交AB的延长线于M交AD的延长线于N则+=．图23-7-12
如图BE与CD相交于点O已知AD=AE∠ADC=∠AEB．找出图中相等的线段相等的角．
如图直线a∥b∥c若=则=
—Nancydoesn’tfeelwell.—Ohlet’stakehertohospitalthedoctor.A.see B.tosee C.seeing D.toseeing
IthoughtIdidwellinthetestbutIfailitinfact.
Whenthe lightsareredyoumuststopandwait.
解方程x³=-0.001
=
已知如图△ABC中AD⊥BC于D下列条件1∠B+∠DAC=90°2∠B=∠DAC34AB2=BD·BC．其中一定能够判定△ABC是直角三角形的有
±=
计算 sin60°-cos45°+
Canyoutellmehowtowriteathank-you?
MrMaafamousmental心理的doctorfromBeijingoncesaidatanimportantmeetingNowmanyyoungstudentscanhavemanyproblemswiththeirminds.Somestudentsbecomeworriedbecausetheyhavetostudyveryhard.Othershavetroublegettingonwellwithpeoplearoundthemliketheirparentsandclassmates.Parentsandteachersshouldcaremoreaboutthisproblem.ThenMr.Magavesomeexamples.Onepatient病人amiddleschoolstudentfromXi’anwasdoingbadlyinhislessons.Hethoughthisteachersandfriendsoftenlaughedathimandhebecamesonervousandworriedthatonenighthelefthishomewithouttellingparents.Anotherstudenta14-year-oldschoolgirlfromShanghaiwasveryafraidofexams.Whileshewasreadingtheexampapershecouldn5tthinkofanythingtowrite.ArecentreportfromJiefangDailysaysabout18%oftheyoungstudentsinShanghaihavementalproblems.Theyoftenfeelworriedandveryunhappy.Unluckilymanyofthemwon’tgoandaskforhelp.Somethinktheywilllookstupidiftheygotoseeadoctor.Otherswon'ttalkabouttheirownsecrets秘密.AttheendofthemeetingMr.Maofferedsomegoodideasistoyoungpeople:♦Talktoyourparentsorteachersoften.♦Takepartingroupactivities.♦Trytogetalongwellwiththepeoplearoundyou.♦Gotoseeadoctorifyouoftenfeelunhappy.根据短文内容选择最佳答案.46.What’sthematterwiththestudentsprobablyiftheyoftenbecomeworriedorhavetroublegettingonwellwithothers? A.Theymayhavenoparents. B.Theymayhavenosecrets. C.Theymayhavementalproblems. D.Theymayhaveaheadache. 47.Whendidthe14-year-oldschoolgirlbecomesonervousthatshecouldn'tthinkofanythingtowrite? A.Whenshewenttoseeadoctor. B.Whenshestudiedveryhard. C.Whenshetalkedwithherparents. D.Whenshehadexams. 48.Whywon’tstudentswithmentalproblemsaskforhelp?A. Becausetheirparentsaretoobusytolookafterthem.B.Becausetheydon'twanttotalkabouttheirsecretswithothers.C.Becausedoctorscan^thelpthemwiththeproblems.D.Becausetheyhavenotimetogotoseeadoctor. 49.HowmanygoodideasdidMr.Maoffertoyoungpeople?A.Two. B.Three. C.Four. D.Five.50.What’sthemainideaofthepassage? A.Youngstudents’mentalproblems. B.Youngstudents’success. C.Youngstudents’communication. D.Youngstudents’secrets.
Ourteachersoftenustoaskquestionsinclass.
—isthemountain?—About2000meters.A.Howwide B. Howbig C. Howdeep D. Howhigh
—Whatabigstormlastnight!—Yes.Iwasdoingmyhomework.allthelightsinmyhousewentoff.A.Suddenly B.Slowly C.Differently D.Quietly
ofthestudentsinClass6havelunchatschool.A.Twofifth B.OnethirdsC.Threefifth D.Threequarters
=
若x=³则=
Youreallydon’thavetohim.Heisoldenoughtolookafterhimself.A. agreewith B.laughat C.worryabout D.giveup
Thistempleisoneofbuildingsinthetown.Wemusttakeactiontoprotectit.A.old B.older C.oldest D.theoldest
在3²π-2³00.101001000100001中有理数有无理数有实数有
化简1|2-|=2|3-π|=
点P32关于x轴的对称点P'的坐标是
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高一上学期英语
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