广东省2024届九年级期中综合评估[2LR]数学.考卷答案

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广东省2024届九年级期中综合评估[2LR]数学.考卷答案试卷答案

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嘉兴一中2022学年第二学期高二英语期中考试答案第一部分：听力(1.5×20=30分)1-5CBCCA6-10CBABC11-15ABCAA16-20BBACB第二部分：阅读理解(2.5×20=50分)21-23BCD24-27ACDC28-31ACBD32-35BACD36-40GAFBE第三部分：完型填空（1×15=15分)41-45BDACA46-50BDACB51-55DCBCA第四部分：语法填空（1.5×10=15分)56.on57.an58.isexpected59.various60.Using61.seconds62.topromote63.said64.possibly65.which应用文（15分)：DearMichael,IamwritingtoextendtoyoumyutmostcongratulationsonyourwinningthefirstprizeofyourgroupintheChinesePoetryContest.Asyourfriend,IjustwantyoutoknowhowdelightedIwaswhenIknowyoursuccess.Fortheseyears,you'veshowngreatinterestinChinesepoetryandkeptonrecitingpoemseveryday.NotonlyhaveyouaccumulatedmuchknowledgeaboutChinesepoetrybutalsoyouhaveformedadeepunderstandingofit.Itisarewardyourichlydeserveforyourappreciationtowardsthosepoems.Allmybestwishesforanevenmoreprosperousfuture!Yoursincerely,LiHua读后续写（25分)：Thencamethefrighteningmoment.Clutchingtheroses,ElizabethmusteredallhercouragetoedgeslowlytowardsthespotwhereMsWolffwasstanding.Withdifficulty,sheopenedhermouth,mouthingtheverysixwords.Butnosoundcameout.Shetriedagain,onlytofeelthewordsstuckinherthroat,unabletopourthemout.Thedimlightfromtheaudiencegraduallybecamenumerousdotsinhereyes.Ultimately,shetookadeepbreathandstammeredinalowvoice,"Beaut...Beautifulflowersforabeautifulperformance!"Withthis,shetentativelypresentedtherosestoAnaWolff,who,inreturn,wrappedElizabethinabighug.Theaudiencecheeredandclappedloudlyforthem.Throughtheglistenofthefootlightsonthestage,Elizabethcouldseethecrowdwhistlingandsmiling.Backstage,ElizabethunburdenedtoMsWolffabouthersecretofstagefright."ThatisexactlyhowIfeeleverytimeIgoonstage!Youneedtoswallowthatfearandgoouthereanyway."saidMsWolff,smilingwithadeterminedlook,"Justthewayyoudidtonight."ThenthegreatAnaWolffgentlydrewasingleredrosefromherbouquetandgaveittoElizabeth,"Hereisabeautifulflowerforabravegirl."

分析由题意可知，△MNP的顶点P的轨迹是焦点在y轴上的椭圆（除去上下顶点），然后结合椭圆定义求出a，b的值，则椭圆方程可求．

解答解：由题意可知，△MNP的顶点P的轨迹是焦点在y轴上的椭圆（除去上下顶点），
又c=5，2c+2a=36，
∴a=13，则b²=a²-c²=144．
∴△MNP的顶点P的轨迹方程为$\frac{{y}^{2}}{169}$+$\frac{{x}^{2}}{144}$=1（x≠0）．
故选：B．

点评本题考查椭圆的定义，考查了椭圆标准方程的求法，是基础题．