首页
试卷库
试题库
当前位置：
X题卡
>
所有题目
>
题目详情
如图为某家庭的单基因遗传病系谱图，图中阴影个体表示患者，相关基因为D、d，请据图回答问题： （1）该遗传病为 （答出基因所在的染色体和显隐性，如“常染色体 显性”）遗传病 （2）如果Ⅱ1不携...
查看本题答案
包含此试题的试卷
高二下学期生物《》真题及答案
点击查看
你可能感兴趣的试题
回答下列有关遗传的问题图中■患甲病男生□正常男性●患甲病女性○正常女性1张某家族患有甲病该家族遗传系
下图为某家族系谱图图中斜线阴影表示的是甲种遗传病患者黑色表示为红绿色盲B-b患者请据图回答1甲种遗传
全国理综21人类遗传病一般可以分为单基因遗传病多基因遗传病和____________遗传病多基因遗传
下图为某家族遗传病系谱图阴影表示患者下列有关分析正确的是
致病基因位于X.染色体上
该遗传病在男、女群体中发病率不同
I-2与Ⅱ-6基因型不同
若Ⅲ-7与Ⅲ-8结婚，则子女患病的概率为2/3
10分1人类遗传病一般可以分为单基因遗传病多基因遗传病和____________遗传病多基因遗传病的
下图为与遗传病有关的某家族遗传系谱图图中阴影代表的为患者其中Ⅰ2不携带该致病基因相关基因用A.a表示
图1为某家族两种单基因遗传病的系谱图这两种遗传病分别由位于常染色体上的基因A/a及X染色体上的
下图为某家族系谱图图中斜线阴影表示的是甲种遗传病相关基因用A.a表示患者黑色表示红绿色盲相关基因用B
右图为人类中的一种单基因遗传病系谱图请回答1仅根据该系谱图可确定控制该遗传病的基因为________
下图为两种单基因遗传病的系谱图已知个体6不带有甲病的致病基因甲病基因用Bb乙病基因用Aa甲病是位于染
系谱法是进行人类单基因遗传病分析的传统方法通常系谱图中必须给出的信息包括性别性状表现以及每一个体在世
下图为两种单基因遗传病的系谱图已知个体6不带有甲病的致病基因甲病基因用Bb乙病基因用Aa个体5的基因
下图为某家族遗传病系谱图阴影表示患者下列有关分析正确的是
致病基因位于X.染色体上
该遗传病在男、女群体中发病率不同
I-2与Ⅱ-6基因型不同
若Ⅲ-7与Ⅲ-8结婚，则子女患病的概率为2/3
右图为某家族遗传病系谱图阴影表示患者下列有关分析正确的是
致病基因位于X.染色体上
该遗传病在男、女群体中发病率不同
I-2与Ⅱ-6基因型不同
若Ⅲ-7与Ⅲ-8结婚，则子女患病的概率为2/3
2009年全国卷Ⅱ1人类遗传病一般可以分为单基因遗传病多基因遗传病和____________遗传病多
下图为某家族遗传病系谱图阴影表示患者下列有关分析正确的是
致病基因位于X.染色体上
该遗传病在男、女群体中发病率不同
I-2与Ⅱ-6基因型不同
若Ⅲ-7与Ⅲ-8结婚，则子女患病的概率为2/3
图1为某家族两种单基因遗传病的系谱图这两种遗传病分别由位于常染色体上的基因A/a及X染色体上的
下图为两种单基因遗传病的系谱图已知个体6不带有甲病的致病基因甲病基因用Bb乙病基因用Aa乙病是位于染
下面是两个单基因遗传病家族系谱图请分析回答:阴影代表有病1甲图中的致病基因位于______染色体上是
如图为某生物兴趣小组通过调查获得的遗传系谱图下列有关说法正确的是
此遗传系谱图可通过社会调查或家庭调查的方式获得
上图所示遗传病的患者都是男性，所以该病一定是伴性遗传病
图中5号个体可能携带该遗传病的致病基因
图中8号个体的致病基因全部都来自6号个体
热门试题
更多
假定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下作文.文中共有10处语言错误每句中最多有两处.错误涉及一个单词的增加删除或修改. 增加在缺词处加一个漏字符号∧并在其下面写出该加的词. 删除把多余的词用斜线/划掉. 修改在错的词下划一横线并在该词下面写出修改后的词. 注意1.每处错误及其修改均仅限一词 2.只允许修改10处多者从第11处起不计分. DearMary IreceiveyourE﹣mailjustnow.Don'tworryaboutme.I'mgettingonwellwithmyresearchworkinthelab.ButtomygreatlysurpriseyousayyouwillgiveuplearnEnglish.Thereasonisbecauseyouhavenotdonewellinitrecentlyandyouhavelostinterests.I'mafraidIcouldn'tagreewithyou.IknowitisdifficultytolearnEnglishandEnglishiswidelyusedintheworldtoday.Itwillbeimportanttoolinourfuturework.Besideitisbecomingmoreandmoreimportantinourdailylife.Ifyoustudyhardyouwillbesucceed.Dorememberthatwherethereisawillthereisaway.I'mlookingforwardtohearinggoodnewsfromyou. Yours LiHua.
失望的sheaskedmetotakehertothetrainstationsayingshewouldtakethetrainbackhome.
若圆C的半径为1圆心在第一象限且与直线4x﹣3y＝0和x轴都相切则该圆的标准方程是．
在长为10cm的线段AB上任取一点C再作一个矩形使其边长分别等于线段ACCB的长则该矩形面积小于16cm2的概率为
若sin＝则cos2α＝
已知fx＝|x﹣1|+|2x+3|． 1求不等式fx＞4的解集 2若关于x的不等式|x+l|﹣|x﹣m|≥|t﹣1|+|2t+3|t∈R能成立求实数m的取值范围．
已知正四面体ABCD中M是棱AD的中点O是点A在平面BCD上的射影则异面直线BM与OA所成角的余弦值为．
工程队将从A到D修建一条隧道测量员测得图中的一些数据ABCD在同一水平面内求AD之间的距离．
若复数z＝m2+m+m+1i是纯虚数其中m是实数则＝
已知函数fx＝曲线y＝fx在点1f1处的切线方程为y＝x+e﹣2． 1求ab的值 2如果当x＞0时ex﹣kxlnx十k1﹣ex﹣1≥0求k的取值范围．
随着经济的发展个人收入的提高自2018年10月1日起个人所得税起征点和税率的调整．调整如下纳税人的工资薪金所得以每月全部收入额减除5000元后的余额为应纳税所得额．依照个人所得税税率表调整前后的计算方法如表 1假如小李某月的工资薪金等所得税前收人总和不高于8000元记x表示总收入y表示应纳的税试写出调整前后关于x的函数表达式 2某税务部门在小李所在公司利用分层抽样方法抽取某月100个不同层次员工的税前收入并制成下面的频数分布表 先从收入在[30005000及[50007000的人群中按分层抽样抽取7人再从中选2人作为新纳税法知识宣讲员求两个宣讲员不全是同一收入人群的概率 3小李该月的工资薪金等税前收人为7500元时请你帮小李算一下调整后小李的实际收人比调整前增加了多少
Thereisnoneedtokeep责备eachotheraboutthebreakingofthewindows.
WhenIwasaboymyfathertaughtmehowtoplantatree.Hetookmeoutintheyardandtoldmeitwasaredbud紫荆tree.Hetoldmewhatwe1todoinordertomakesurethetreewouldonedaybebigandstrong.Onedayhesaidyourboyswill2thistree.AlthoughIwasonlyeightatthetimeIwas3thanthistree.Anditwasgoingtogrowtallenoughformysonstoclimb?ThatIhadto4! Wellayoungboy's5isdrawnhereandthererathereasilysothetreesoongotlostamongmanyotherthingsweighingon使烦恼my6mind.TimewentbyquicklyandI7myselfwellbeyondmyfather'sagewhenweplantedthattree.Iwas8toobusyandneverhadthosesonswhoweretoclimbthattree.9I'dhardlyeventhoughtofthetreeinmanyyears. Thingshadawayof10strangelyandIrecentlyfoundmyselfintheoldneighborhood.Thattreecameto11andIjusthadtoseewhathadbecomeofit.The12hadchangedalotovertheyearsbutIhadno13findingtheoldhouseandthetree.14enough!Thatredbudwasmuchtallerthanmyhouseand15itlikeabigumbrella.Althoughitwasn'tthereformyboystoclimbtherewasaswing16fromthebigbranchofthetree. AsIdroveawaythat17broughttomindmanythingsI'd18overtheseyears.Butone19cametomeclearly.Wespenttoomuchtimebeingbusyinordertobe20inourlives.Ishouldhavecometoseetheredbudmoreinthepassedyears. 1A.meant B.preferred C.needed D.used 2A.climb B.cut C.plant D.cell 3A.heavier B.taller C.older D.better 4A.see B.remember C.believe D.speak 5A.ambition B.time C.strength D.attention 6A.busy B.sad C.lively D.cool 7A.expected B.guessed C.found D.doubled 8A.never B.seldom C.hardly D.always 9A.Infact B.Inrelief C.Forexample D.Aboveall 10A.settingout B.comingabout C.preparingfor D.showingoff 11A.wonder B.sight C.mind D.space 12A.friends B.neighborhood C.sign D.school 13A.interest B.energy C.idea D.difficulty 14A.Strange B.Nice C.Sure D.Lucky 15A.protected B.left C.covered D.hurt 16A.sticking B.hanging C.fixing D.coming 17A.performance B.game C.visit D.conversation 18A.disagreed B.reported C.written D.forgotten 19A.surprise B.dream C.plan D.thought 20A.normal B.successful C.simple D.honest
在平面直角坐标系xOy中以O为极点x轴的正半轴为极轴建立极坐标系曲线C的极坐标方程为ρ＝2sinθ+2acosθa＞0直线l的参数方程为t为参数直线l与曲线C分别交于MN两点． 1写出曲线C的直角坐标方程和直线l的普通方程 2若点P的极坐标为2π求a的值．
已知fx与函数y＝﹣asinx关于点0对称gx与函数y＝ex关于直线y＝x对称若对任意x1∈01]存在使gx1﹣x1≤fx2成立则实数a的取值范围是
Therearetimesinlifewhenthingsdon'tgoasexpected.Perhapsanimportantprojectofyoursendedupinfailure.Oryougotlaidofffromyourjob.Whateveritisitmightmakeyoudepressed.Butyouneedtogetthingsbackundercontrol.Youneedtokeepmovingforward.1.Inthiswayyoucanfacethesituationwithapositiveattitude.HowtoFeelBetter?Herearesometipstomakeyourselffeelbetterwhenyou'redepressed 1.Calmdown Beforeanythingelsecalmyourselfdown.Don'tpanic.2.Youcanonlyapplythetipsbelowifyouarecalm. 2.3 Whenyou'redepressedit'seasytofallintoacycleofnegativethoughtswhichmakesthingslookworsethantheyactuallyare.It'simportantthatyoubreakthiscyclesothatyoudon'tbecomeavictimofyourownthoughts.Youmayreadspiritualtextsmotivationalbooksorinspiringquotes.Youmayalsolistentopositivetapes. 3.Remembergoodthings Ourmindstendtofocusonthenegativeandnotthepositive.4.Rememberthegoodthingsinyourlife.Rememberthegoodpeoplearoundyou. 4.Forgive Sometimesonereasonyoufeelbadisbecauseyoudon'tforgive.Perhapsyouhadmademistakesinthepastandyoublamedyourselfforit.Youneedtoforgiveyourself.Orperhapssomeonemistreatedyou.5Iknowit'seasiersaidthandonebutasMahatmaGandhisaidTheweakcanneverforgive.Forgivenessistheattributeofthestrong. Soletusallbestrong. A.Youapologizedforit. B.Youneedtoforgivethem. C.Youneedtomakeyourselffeelbetter. D.Closeyoureyesandtakeadeepbreath. E.Butyoushoulddirectyourmindtothepositive. F.Feedyourmindwithpositivethoughts. G.Saysomethingpositive.
Toour快乐高兴thegovernmenthaspassedsomelawsofprotectingtheairandwecandosomethingusefultoo.
已知椭圆C＝1a＞b＞0的离心率为且过点． l求C的方程 2设不过原点O直线与C相交于AB两点且直线OAABOB的斜率成等比数列求AOAB面积的取值范围．
Music OperaatMusicHall1243ElmStreet.TheseasonrunsJunethroughAugustwithadditionalperformancesinMarchandSeptember.TheOperahonorsEnjoytheArtsmembershipdiscounts.Phone241﹣2742.http://www.cityopera.com. ChamberOrchestraTheOrchestraplaysatMemorialHallat1406ElmStreetwhichoffersseveralconcertsfromMarchthroughJune.Call723﹣1182formoreinformation.http://www.chamberorch.com. SymphonyOrchestraAtMusicHallandRiverbend.Forticketsalescall381﹣3300.RegularseasonrunsSeptemberthroughMayatMusicHallinsummeratRiverbend.http://www.symphony.org/home.asp. CollegeConservatoryofMusicCCMPerformancesareonthemaincampus校园oftheuniversityusuallyatPatriciaCobbettTheater.CCMorganizesavarietyofeventsincludingperformancesbythewell﹣knownLaSalleQuartetCCM'sPhilharmonicOrchestraandvariousgroupsofmusicianspresentingBaroquethroughmodernmusic.StudentswithI.D.cardscanattendtheeventsforfree.Afreescheduleofeventsforeachtermisavailablebycallingtheboxofficeat556﹣4183.http://www.ccm.uc.edu/events/calendar. RiverbendMusicTheater6295KelloggAve.Largeoutdoortheaterwiththeclosestseatsundercoverpricedifference.Bignameshowsallsummerlong!Phone232﹣6220.http://www.riverbendmusic.com. 1Whichnumbershouldyoucallifyouwanttoseeanopera? A.241﹣2742. B.723﹣1182. C.381﹣3300. D.232﹣6220. 2WhencanyougotoaconcertbyChamberOrchestra? A.February. B.May. C.August. D.November. 3WherecanstudentsgoforfreeperformanceswiththeirI.D.cards? A.MusicHall. B.MemorialHall. C.PatriciaCobbettTheater. D.RiverbendMusicTheater. 4HowisRiverbendMusicTheaterdifferentfromtheotherplaces? A.Ithasseatsintheopenair. B.Itgivesshowsallyearround. C.Itoffersmembershipdiscounts. D.Itpresentsfamousmusicalworks.
FromtimetotimeItraveltotownfrommynewcountryhome.OnthisparticularSaturdayitwasAdam'sturntoaccompanymeontheforty﹣five﹣minutedrive﹣﹣﹣﹣acoveted渴望的pleasure. Adamhasadeepfondnessofcandy.Ifheknewtherewasacandytreatontheothersideofamountainhewouldmovetheentiremountainstonebystonetogetthetreat. Whenwearrivedwewalkedtowardthestore.ButIfoundAdamhadfallensilent﹣hisstarefallingonsomethingfurtherdownthestreet. Thereanoldmansatbythestoreentrancebegging.HisgraysweaterhadmanyholesexposingadirtyT﹣shirt.Hesatwithhisbacktothewallhishandscuppedaroundanemptyhat. CanIhavemydollardaddy?IpulledadollarandhandedittoAdamandthoughthewoulduseittobuyhiscandy.Thankyoudaddy.HewentawayandIwentontochoosesomethingweneeded.Afterawhileweleftthestoreandwalkedafewfeettothecorner.WhilewaitingforthelightIfeltAdamgentlysliphishandfrommine.Iturnedwatchinghimashewalkedbacktothebeggargivinghisdollar. WhenhecamebackIhuggedAdamsayingDaddyisveryproudofyouAdam.Thatwasverythoughtful. Itcertainlywasconfirmed证实afemalevoicetomyright.Iturnedandwatchedamiddle﹣agedwomanplacefivedollarsintheman'shat.MayI?sheaskedassheleanedovertokissAdam'scheek.Inoddedandsmiled﹣Adamsmiled. Lookdaddy.Adamwaslookingovermyshouldertothebeggar.Asmallgroupofpeoplehadgatheredaroundhimplacingmoneyinhishat.Icouldn'thelpbutrecallathoughtAchildshallleadthem. 1WhydidAdambecomesilentwhenwalkingtothestore? A.Becausehefelttiredafterthedrive. B.Becausehenoticedabeggarsittingbythestore. C.Becausethebeggaraskedmoneyfromhim. D.Becausehesawanoldmansatbeforethestoreentrance. 2Whatmadethewriterfeelproudofhisson? A.Adamdaredtowalkaloneonthebusyroad. B.Adamwasabletobuysomethingforhimself. C.Adamsharedhissweetwithpoorbeggar. D.Adamgavehismoneytothepoorbeggar. 3WhatdidthewomanwanttodobyaskingMayI? A.ShewantedtoshowherpraisebykissingAdam. B.Sheaskedifshecouldgivethebeggarsomemoney. C.SheintendedtogivefivedollarstoAdaminreturn. D.Shehopedtokissthewriterforhisactofkindness. 4Fromthepassagewecanmakeaconclusionthat. A.achildisoftenthefirsttoloveothers. B.achildcantaketheleadinlovingothers. C.achildusuallyneedsotherstoleadhim. D.achildsometimesshouldbeledtodothings.
ThesmilingfaceofSantaClausappearsallacrossChina.Localgovernmentsaredecoratingtreesandlamppostswithlightsandornaments.1firstglancevisitorswouldthinktheywereinEurope. Despitethefact2mostChinesearenotChristiansChristmasseasonhasbecomeincreasinglypopular. Ifyou3walkaroundmajorChinesecities15yearsagoyouwouldn'thaveseenmanysignsofChristmas.HoweverifyouweretovisitthosesameChinesecitiesagaintodayyou′dbesurprisedtoseesignsofChristmasalmosteverywheresaysCaiJiming4professorofTsinghuaUniversitywhohasserved5anexpertindevelopingChina′sholidayschedule. 6ChristmasisnotapublicholidaymanyChinesecitiesarestillgettingintotheChristmasspirit. Caisays7e﹣mailinboxandcellphonehavebeenfloodedwithmessages8wishhimamerryChristmas.ThegreetingshavebeencominginsincetheendofNovember. InhisviewChristmasseemslikeawarm﹣upforthe9trueimportantmonth﹣longSpringFestival10beginsonJanuary1stofthelunaryear.
已知点C为扇形AOB的弧上任意一点且∠AOB＝120°若λμ∈R则λ+μ的取值范围为
已知点F10直线lx＝﹣1P为平面上的动点过点P作直线的垂线垂足为Q且． 1求动点P的轨迹C的方程 2设直线y＝kx+b与轨迹C交于两点Ax1y1Bx2y2且|y1﹣y2|＝aa＞0且a为常数过弦AB的中点M作平行于x轴的直线交轨迹C于点D连接ADBD．试判断△ABD的面积是否为定值若是求出该定值若不是请说明理由．
设F1F2分别为双曲线x2﹣＝1的两个焦点P是该双曲线上的点且3|PF1|＝4|PF2|则△PF1F2的面积为
已知{an}是公差为的等差数列Sn为{an}的前n项和若a2a6a14成等比数列则S5＝
Twonewstudiessuggestthatmodernrunningshoescouldincreasetheriskofinjuriestorunners. Onestudyinvolvedsixty﹣eighthealthyyoungwomenandmenwhoranatleasttwenty﹣fourkilometersaweek.Therunnerswereobservedonatreadmillmachine跑步机.Sometimestheyworerunningshoes.Othertimestheyranbarefoot. Researchersfoundthatrunningshoescreatemorestressthatcoulddamagekneeshipsandanklejointsthanrunningbarefoot.Theyobservedthattheeffectwasevengreaterthantheeffectreportedearlierforwalkinginhighheels. TheotherstudycomparedrunnersintheUnitedStatesandKenya.Theresearchersdividedtherunnersintothreegroups.Onegrouphadalwaysrunshoeless.Anothergrouphadalwaysrunwithshoes.Andthethirdgrouphadchangedtoshoelessrunning. Runnerswhowearshoesusuallycomedownheelfirst.Thatputsgreatforceonthebackofthefoot.Butthestudyfoundthatbarefootrunnersgenerallylandonthefrontormiddleoftheirfoot.Thatwaytheyeaseintotheirlandingandavoidstrikingtheirheels. DanielLiebermansaysthewaymostrunningshoesaredesignedmayexplainwhythosewhowearthemlandontheirheels.Theheeloftheshoeisbiggerandheavierthanotherpartsoftheshoesoitwouldseemmorelikelytocomedownfirst.Alsotheheelgenerallyhasthickmaterialunderittosoftenlandings. Buttheresearchersdonotsuggestthatrunnersimmediatelystartrunningbarefoot.Theysayittakessometraining.Andtherecanberiskslikerunningwhenyourfeetaretoocoldtofeelifyougetinjured. 1What'sthemainideaofthepassage? A.Runninginshoesispartlygoodtorunners. B.Twonewdiscoveriesencouragepeopletoruninhighheels. C.Walkinginhighheelscouldcauselessseriouseffectsthanrunningbarefoot. D.Twonewstudiesproverunningwithoutshoesisbeneficialtorunnersinmostcases. 2Fromthefifthparagraphwecaninferthat. A.runningbarefootisfasterthanrunninginshoes. B.thelandingpointisveryimportantinrunning. C.runningshoelesscangivepeoplearealexercise. D.differentrunningwayscausedifferentinjuries. 3Whydopeoplewhoruninshoeslandontheirheels? A.Becausetheshoesputgreatforceonthebackofthefoot. B.Becausethedesignofrunningshoesisunreasonable. C.Becausepeoplewhooftenrungetusedtolandingontheirheels. D.Becausetherunningpeoplewanttorunfaster. 4What'sthewriter'sattitudetowardstheuseofthemodernrunningshoes? A.Positive. B.Persuasive. C.Objective. D.Supportive.
Despitegainsinrecentyearswomenstillfallbehindmeninsomeareasofmathachievementandthequestionofwhyhascausedheatedargument.NowastudyoffirstandsecondgraderssuggestswhatmaybepartoftheanswerFemaleprimaryschoolteacherswhoareconcernedabouttheirownskillscouldbepassingthatalongtothelittlegirlstheyteach. YoungstudentstendtomodelthemselvesafteradultsofthesamesexexplainedBeilockanassociateprofessorinpsychologyattheUniversityofChicago.Littlegirlsmaylearntofearmathfromthewomenwhoaretheirearliestteachers.Beilockandhercolleaguesstudied52boysand65girlsinclassestaughtby17differentteachers.NinetypercentoftheUSprimaryschoolteachersarewomenaswasallofthoseinthisstudy. Students'mathabilitywasnotrelatedtoteachers'mathanxietyatthestartoftheschoolyearbutattheendoftheyearthemoreanxiousteacherswereabouttheirownskillsthemorelikelytheirfemalestudents﹣butnottheboys﹣weretoagreetothatboysaregoodatmathandgirlsaregoodatreading.Inadditionthegirlswhoansweredthatwayscoredloweronmathteststhaneithertheclasses'boysorthegirlswhohadnotdevelopedsuchabelieftheresearchersfound. Afterseeingtheresultstheresearchersrecommendedthatthemathrequirementsforobtainingaprimaryeducationteachingdegreeshouldberethought.Ifthenextgenerationofteachersespeciallyprimaryschoolteachersisgoingtoteachtheirstudentsmoreeffectivelymorecareneedstobetakentodevelopbothstrongmathskillsandpositivemathattitudesintheseeducatorstheresearcherswrote. Girlswhogrowupbelievingfemaleslackmathskillswindupavoidinghardermathclasses.ItkeepsgirlsandwomenoutofalotofcareersparticularlyinsciencetechnologyBeilocksaid. 1Wecanlearnfromthefirstthreeparagraphsthat. A.teachersinUSprimaryschoolsaremostlyfemales B.thestudentsinvolvedinthestudyarestartersatprimaryschool C.youngstudentsusuallyfollowexampleoftheirfemaleteachers D.it'struethatboysdowellinmathwhilegirlsdowellinreading 2Wecanweinferfromthetext? A.Beilock'sstudywillbringaboutaprimaryeducationrevolution. B.Girls'lackofconfidenceinmathskillsaffectstheirfuturejobs. C.Theperformanceofthestudentschangedlittleduringtheprocessofthestudy. D.Theresearchersarguedthatcurrentprimaryschooleducationneededimproving. 3What'sthesuggestedsolutiontothephenomenonmentionedinthetext? A.Usingdifferentapproachestoexcitestudents'interestinmath. B.Reducingthenumberofsituationsthatmaketeachersanxious. C.Creatingmorechancesforboysandgirlstoworktogetherinclass. D.Improvingteachers'mathskillsandchangingtheirmathattitudes. 4What'sthemainideaofthetext? A.Girlsmaylearnmathanxietyfromfemaleteachers. B.Boysarefreefromthemathanxietyoffemaleteachers. C.Primaryschoolteachershaveafar﹣reachinginfluenceonstudents. D.Studentsshouldlearnhowtoholdpositiveattitudestowardsmath.
已知点P﹣33过点M30作直线与抛物线y2＝4x相交于AB两点设直线PAPB的斜率分别为k1k2则k1+k2＝
已知数列{an}的各项均为正数前n项和为Sn满足an2+2an＝4Sn﹣1则a10＝．
Underthenewcurriculumstandardourteachershave采用thenewmethodofteaching.
热门题库
更多
高三上学期生物
高三上学期化学
高二下学期化学
高二下学期生物
高三下学期生物
高三下学期化学
高三上学期英语
高二下学期英语
教案备课库
高三下学期英语
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
国际法
湘公网安备 43130202000226号