21.AR+AD=AC.证明：因为∠DCE=∠BC=∠A=90P,所以∠AC)+∠ACE=909=∠E+∠AC.所以∠AC)=∠∠A=∠EBC,在△ACD和△BEC中，{∠ACD=∠E,DC=CE.听以△ACD≌△BEC(AAS).所以AD=BC.所以AB+AD=AB+BC=AC22.(1)因为∠A+∠ABC+∠C+∠1DC=360°，∠A=∠C=90P.所以∠ABG+∠ADC=360°-90°-90°=180°.因为BE,DF分别分∠ABC和∠ADC,所以∠ABC=2∠1，∠ADG=2∠2.所以2∠1+2∠2=180°.所以21+∠2=号×180°=909(2)设多边形的边数为n,则(n-2)×180°=2×360°+360解得n=8.所以(8-2)×180°÷8=135°，即这个多边形的每个内角都是135°23.（1)因为ADLBC,BD=ED,所以AB=AE.所以∠D1E=2∠BME=20°，∠AED=90°-∠DAE=70°.因为EF垂H分AC,所以AE=CE.所以∠EAC=∠C,且∠AED=∠EAC+∠C=2∠C=70°.所以∠C=35.(2)因为△ABC的周长为18cm,AC=6em,听以AB+BG=18-6=12(cm).因为AE=CE.所以△ABB的周长=AB+B+AE=AH+BE EC=AB+BC=12(cm).24.（1)因为△ABC为等边三角形，所以∠ABG=60°.因为D为AC的中点，所以DB分∠ABC所以∠DC=30因为∠PDQ=120°，所以∠P=180°-120°-30°=30所以∠DBC=∠P.所以DB=DP(2)过点D作DBC交AB于点I.因为△ABC是等边三角形，AC=8,D是AC的中点，所以AD=CD=4,∠B=∠C=∠A=60°，BC=AC=8.因为DI∥BC,所以∠ADH=∠C=60°，∠AHD=∠B=60P.所以∠ADH=∠AHD=∠A=60所以△A)/是等边三角形，所以AD=HD=AH=4.所以IID=CD=BI=4.因为∠Q0P=∠H1DG=120P,所以∠QDH=∠PDC∠(OHDH=∠PDC,在△QDI和△PD中，HD=CD,∠(01110=∠C所以△ODH≌△PDC(ASA).所以HQ=CP:所以BQ+BP=BH+HQ+BP=4+BP+CP=1225.（1)选择方法证明如下因为AD分∠BAC,所以∠BAD=∠CMD,AB=AE.在△BAD和△EAD中，∠BAD=∠EAD,AD=AD.所以△BAD≌△AD(SAS).

基础题与中考新考法·七年级·上·数学1.5有理数的乘方为122500.1.5.1乘方12.9【解析】由题意可得a-2=0,b+3=0,所第1课时有理数的乘方以a=2,b=-3,所以b=(-3)2=91.A13.解：原式=-2023×2023+3×202320234-2023×202342.1(3)【解析】根据乘方的概念可知-（-2023+3)×20234(1-2023)×20234)的3次幂应写成（一子(--2020-2022易错点拔1010负数的乘方，在书写时一定要把整1011个负数用小括号括起来，(-a)”与-a”是14.解：(1)<，<，>，>，>；不相同的，(-a)”表示(-a)·（-a)·…【解法提示】因为12=1,2=2，所以12<2；(-a),-a”表示-(a·a·…·a)因为23=8,32=9，所以23<32；因为34=81，同步课43=64,所以34>43；因为45=1024,54=625，2.22,4,-(2×2×2×2)所以45>54；因为56=15625,65=7776，所以3.D4.B分56>6.5.1-15.2-15.3-1;-1;1;-1练(2)当n≤2时，n<(n+1)";6.解：(1)216；(2)0；(3)0.25；(4)256；当n≥3时，n>(n+l)";第(56(6号(3)因为2023>3，章7.D所以20232024>202420238.解：第一次转发后接收到短信的人数为所以-20232024<-20242023」2个，15.解：(1)：【解法提示】由题图可得，部分①第二次转发后接收到短信的人数为22个，第三次转发后接收到短信的人数为21.11的面积是4，部分②的面积是4×416？个，…所以当转发完4次后，接收到这条短信的人部分③的面积是↓×1-1y.,阴影部分的面16464数为2+22+23+24=30（人）19.B【解析】m个3相乘可记为3m,n个2相积=部分③的面积=64加可记为2n,所以原式=3m+2n(2)333，,311+…十10.C【解析】A.(-2)3=-8,（-3)2=9,不符4T166449s1、11-4+(416)+合题意；B.(-2)3=-8,2=8,不符合题意；11、C.(-2)3=-8,-23=-8,符合题意；D.(-2)4=16,-24=-16,不符合题意16.C【解析】由题意可知，7×7×7×7×7×711.122500【解析】由表中数据可得，底数的=76小数点向左（右）移动一位，方数小数点第2课时有理数的混合运算向左（右）移动两位，所以3502的值1.D2.C3.A14万唯七年级QQ交流群：688570199

y/2sin6x+孕y=h0:y=t118.(1)如图所示：作AB中点O,连接OC,OA,B:AA=AB,∠BAA=60°，DABA是等边三角形，∴AB⊥OA又：C4=4,AB=25,CB=27,满足CA2+AB2=CB2,即有A,B,⊥AC,而AB∥AB,所以AB⊥AC,OA∩AC=A,OA,ACc面AOC,.:AB⊥面A,OC,而OCc面AOC,所以AB⊥OC,又因为O是AB中点，所以CA=CB(2)若CA=4,则0C=√4-52=3，易知04=3，以点O为原点，分别以OA,OA方向为x,y轴，以过点O竖直向上的直线为z轴建立空间直角坐标系，如图所示：

二全国©0所名校高考模拟金典卷21.(12分)22.(12分)已知函数f(x)=(2-x)e-a.x-2.阿基米德（公元前287年一公元前212年）不仅是著名的物理学家，也是著名的数(1)若f(x)在R上单调递减，求实数a的取值范围；学家，他利用“逼近法”得到椭圆的面积除以圆周率π等于椭圆的长半轴长与短半(2)当0≤a<1时，证明x)在0，十∞)上只有-个零点，且6>0)的面积为3√2π，椭圆的焦距为2√3.(1)求椭圆C的标准方程；(2)已知A,B是椭圆C上两个不同于点T(2,1)的动点，F,F2是椭圆C的左、右焦点，且直线AB的斜率为1，已知△TAB的内心为K,求KF|+|KF2|的最密小值.封线数学（四）第7页（共8页）【24新高考·JD·数学-N】数学（四）第8页（共8页）【24新高考·JD·数学-N】

三全国1©©所名校高考模拟金典卷三、解答题：共70分.解答应写出文字说明、证明过程或演算步骤.第17~21题为必考题，每个试题考生都必须作答.第22、23题为选考题，考生根据要求作答一)必考题：共60分，17.(12分)BanC二csA,@snA+)=2si如A这两个条件中任选一个，补充面的横线上并解答。已知△ABC的内角A,B,C所对的边分别为a,b,c,·(1)求A;密(2)a=2,b=√6，求△ABC的面积.冠，照小S共醇本：属注：若选择多个条件解答，则按第一个解答计分，的永要自醒合补鼠0,10,)A合顺单装点中其，小一5女以口日封18.(12分)如图，四边形ABEF是等腰梯形，AB∥EF,AF=BE=2,EF=42,AB=2√2，四边形ABCD是矩形.AD1面ABEF,其中Q,M分别是线段AC,EF的中点，P是线段BM的中点.(1)求证：PQ∥面BCE.(2)求点F到面BCE的距离.线面期四国不」出人：阳)珍)数学（五）第4页（共8页）【24·D·数学（文科）一QG】

1.Which of the following companies rates highest?A.Allied.B.American Van Lines.C.International Van Lines.D.North American Moving Services.2.What is the advantage of American Van Lines?A.It gives pricing information online.B.It is experienced in packing expensive items.C.It has moving containers for interstate moves.D.It guarantees the lowest price of the same service.3.What do the four companies have in common according to the text?A.They feature highly skilled movers.B.They have over 80 years of experience.C.They can provide moving services nationwideD.They can offer services for customized packing.BIn 2014,Mahoney performed an act of kindness as part of a Facebook challenge.She picked a79-year-old senior named Wagner,who regularly gave back to the community.Mahoney wanted toknow Wagner better,so they spent a day together,picking up groceries and getting their nails done."It was the first time in years that someone had made a day about her,"says Mahoney.Their shared experience got Mahoney thinking.How many other seniors might benefit fromdedicated attention?She came up with a plan:find local seniors with long-time dreams and work tofulfill their wishes.She named the new charity:We Are Young,or WAY for short.Seniors can nominate (themselves or be nominated by someone else;wishes are thenassessed by a community committee that looks at factors such as age-related physical barriers,socialisolation and financial need.Melanie nominated her husband,78-year-old Victor,to go rockhounding,a hobby he'd given upwhen it became too physically difficult to access the bay where he hunted for geodes ()Theteam at WAY hired a boat for him and his son so they could reach the bay and search out geodes onthe beach."Now,Victor has regained his self-confidence and is willing to take on new challenges.Wewant to show that anything is possible with the support of others,"says Mahoney.Up to now,WAY has delivered on 41 dreams,ranging from a helicopter trip over a childhoodblueberry-picking spot to travelling to Toronto to watch a Blue Jays game.While her charity operatesonly in Nova Scotia,Mahoney has her own dream.Each WAY wish is recorded on video,and shewants people watching to be inspired to fulfill a wish for a senior in their own community."We wantto create a national movement that shifts how we as a society view,value and support seniors,"saysMahoney."That is the impact we're trying to create."英语试题第3页共10页

必修一UNIT1 TOPIC TALK,LESSONS1&2综合评估参考答案及部分解析参考答案1-5 BBAAC6-10 ACBAC11-15 BCBAC16-20 CBACA21-25 DCDDC26-30 BABBD31-35 BADAA36-40 EACBF41-45 BCAAC46-50 DBDAC51-55 DABBD56.a57.came58.challenging59.working60.experiences61.their62.it63.deeply64.confidence65.with写作（划线部分为精彩表达）第一节One possible version:Dear Simon,I'm writing to tell you about our military training program during the first two weeks ofsenior high.Dressed in military uniforms,we began a two-week training on September 2nd,whichmarked a new chapter in our life.During the training,we were asked to follow soldiers'dailyroutine and go through intensive formation training.We were also taught some combat skills.Despite the hardship of training,we enjoyed ourselves and learned a lot about hard work,perseverance and determination.

学方法报湘教七年级B国内统一连续出版物号：CN14-0706/(F)数学周刊参考答案第5期2023年11月07日第13期参考答案第1课时数据的收集与抽样第5章数据的收集与统计图(5.1~5.2)同步诊断自主学：抽样调查一、选择题课堂探究：例140%例2C1.C2.D3.B4.B5.C6.C即学即练：1.D2.C3.D4.D5.B6.D二、填空题7.全面调查7.折线8.全面调查9.样本选取不合理8.解：总体是该市七年级学生的视力状况；个体是该市每10.A酒店营业额逐月稳定上升名七年级学生的视力状况：样本是抽取的1000名七年级学生11.80012.30的视力状况：样本容量是1000.三、解答题9.(1)抽样调查.(2)抽样调查.(3)全面调查.13.解：(1)采用的是抽样调查.第2课时统计图(2)总体：七年级400名学生的视力情况；自主学：折线扇形条形条形扇形折线样本：抽取的80名学生的视力情况；课堂探究：(1)抽查的样本总人数为14÷28%=50，等级B的个体：该校七年级每一名学生的视力情况：人数为50×40%=20，补全条形统计图略样本容量：80.(2)等级D所在扇形的圆心角的度数为360°×4=28.8°14.(1)抽样调查300即学即练：1.B2.A3.D4.D5.A6.60°(2)喜欢收听易中天《品三国》的学生最多，7.乙3620甲15.解：(1)选择交通监督的人数是12+15+13+14=54（人）.8.解：(1)调查的总人数为20÷40%=50，则b=50×8%=4,a=选择交通监督的人数占调查人数的百分比是，54××100%=20050-20-16-4=10.27%.2360×072扇形统计图中交通监督所在扇形的圆心角度数是360°×答：表示“比较熟练”的扇形部分的圆心角的度数为72°、27%=97.2°.9.解：(1)国庆期间物华超市4日的营业额最高，蓝天超市(2)D班选择环境保护的学生人数是200×30%-15-14-16=1日的营业额最低15(人).补全折线统计图如图所示：(2)蓝天超市3日、7日的营业额超过了物华超市，6日的营个人数（人）业额和物华超市最接近.16----·一环境保护15·交通监督14(3)蓝天超市国庆节期间的营业额整体呈现先升后降的1312趋势；物华超市国庆节期间的营业额整体呈现先升后降再升最后降的趋势0A BC D班级

全国名校高中模块单元检测示范卷数学（一）第二章元二次函数、方程和不等式C>建议时间：120分钟试卷满分：150分一、单项选择题：本题共8小题，每小题5分，6.已知a,b,c为互不相等的正数，且a2+c2=共40分.在每小题给出的四个选项中，只2bc,则下列说法正确的是(D)有一项是符合题目要求的A.a-c与a-b同号X1.函数y=√x(x+2)的定义域是(D)B.a-c与a-b异号C.a-c与b-c异号A.[0,2]D.a-c与b-c同号B.[-2,0]7.设二次函数y=(a-2)x2+3ax+2在R上C.(-∞，0]U[2,+∞)有最大值，且最大值为m,当m取最小值D.(-o,-2]U[0,+∞)时，a=()2.设t=a-4b,s=a+b2+4,则t与s的大小A.0B.1关系是（G)B.s>tcD.√2As≥tC.s≤tD.s0,y>0,且9=1，则心+28.已知a>b>c,若不等式。6t方+入4y+1的最小值为>0恒成立，则实数入的取值范C)c-ay围是A.2+22B.4A.入<4B.入≤4C.4+√2D.4+2W2C.λ>4D.λ≥44.已知二次函数f(x)=ax2+bx+c满足a>·二、多项选择题：本题共4小题，每小题5分，b>c,且a+b+c=0,则该二次函数的大共20分.在每小题给出的四个选项中，有致图象为03)多项符合题目要求.全部选对的得5分，部分选对的得2分，有选错的得0分9.如果ab+cy B.ac bdC.D.a25.若a,b,c>0,且a2+2ab+2ac+4bc=120,则(ABCD则a+b+c的最小值是A.当a<0时，不等式的解集为{x1一

g(x)=3x2-2x-1=(3x+10x-1,g0=3x+1x-1）=0,x=-l,…7分列表如下：1(1,2)233g(x)00+单调递增极大值单调递减极小值-1单调递增28(x)7…11分所以g(x)的值域为[-1,2].…12分19.(本题满分12分)解：(1)f(x)是R上的奇函数，.f(0)=0.1+k=0.k=-1,经检验k=一1符合题意。…3分0=a-a气即2a2-3a2=0.解得a舍，0=2.5分》2故a=2,k=-1.(2)3x∈使得f(2x2)<-f(1-mx),即f(2x2)2x+,所以m>(2x+m,又因2x+之22x=2W5,当且仅当x=5时取“，…11分所以m>2V2.…12分20.(本题满分12分)第⑩u=y+4土2.0≤x2…5分3+45由1=(2)t=七1=-二=0解得x=3,…9分3Wx2+45高三年级数学参考答案第2页共5页

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第4期测试题部分答案解析阅读理解导语：本文是一篇应用文，属于“人与社会”主题语境。文章介绍了在爱丁堡艺术节上游客可以随时就餐的四家餐馆。l.B。理解具体信息。根据Eleanore部分owner Roberta launched...Eleanore.Named afterRoberta's boat可知，Eleanore这个名字来源于餐馆主人的船。2.C。推断。根据Bertie's部分.the perfect place to celebrate parties and special group events.upto300 guests.可推知，Bertie's可容纳最多300人就餐，是公司举办宴会的不错选择。3.A。理解具体信息。根据Williams&Johnson部分.their seasonally picked coffees and theirselection changes through the year as they continue to source new fresh crop beans.,Williams&Johnson的特点是对咖啡豆的精心挑选。B导语：本文是一篇夹叙夹议文，属于“人与社会”主题语境。小男孩Evan通过给收容所的小狗读书，稳定它们的情绪，帮助它们找到永远的家。4.A。理解具体信息。根据第一段He helps socialize the baby dogs...getting them ready foradoption.Because of this,Evan was named.可知，Evan帮助收容所的小狗找到家庭收养，这让他荣获该奖项。5.C。理解具体信息。根据第二段He found that living in a shelter can cause stress and fear for theanimals.可知，收容所会让动物害怕，给它们很大压力。6.B。推断。根据第三段I think the calming and the reading help them take their mind off theirworries,.so they are used to being around people.可推知，Evan给狗狗读书，和它们相处，帮助它们静下来，惯和人相处。7.D。理解态度。根据末段He said the award makes him feel really good,.but it also makes himwant to work even harder.he will continue to find ways to help dogs in need.可推知，得奖激励着Evan更加努力做更多的事来帮助狗狗。C导语：本文是一篇说明文，属于“人与社会”主题语境。镜片起雾一直困扰着戴眼镜人土，近日，科学家们发明了一种涂层能够防止镜片起雾，有望在将来解决这个问题。8.D。理解主旨要义。总结第二段.the foggy lenses.It happens when moisture.hits a glasseslens.It happens a lot in the winter.等内容可知，本段主要介绍了眼镜起雾的原因。9.C。理解词汇。根据第三段It's also a problem及making it hard for a driver to see可推知，起雾这个问题同时也烦扰着汽车挡风玻璃。l0.B。理解具体信息。根据第四段The gold...causing glasses lenses to heat up by up to eightdegrees..By doing this,.it can prevent moisture in the air from forming on the glasses.可知，黄金涂层能够吸收太阳光，使镜片升温8度，从而阻止水分在玻璃上形成雾。ll.A。理解具体信息。根据末段the coating won't do much good in the winter months,.when itstarts to get dark by late afternoon可知，涂层的缺点是受温度限制，冷的时候作用发挥不好。D导语：本文是一篇人物传记，属于“人与自我”主题语境。Oprh坚持不懈、努力工作，最终成为世界上最成功、最有影响力的人之一。l2.D。推断。根据第二段When she found herself limited by the objectivity of news reporting.she turned to be.以及第三段Skilled at the relaxing and personal talk show style.可推知，Oprh不愿受限于新闻节目的客观性要求，所以转去做了脱口秀节目主持人，可以更自由表

Part 3 /Using Language Assessing your ProgressCOLLECTIONS1.cross the whole country by railL.用括号内所给单词的适当形式填空。详情请参考2.take a boat ride out into the bay1.Astonished (astonish),I realized that the boys had also3.take a pleasant hike in a forest4.take a coach bound northrecognized what the gesture meant.5.the most awesome journey2.It was a misty (mist)morning,so I didn't drive to work.6.看到种类繁多的生物3.In that experiment,volunteers were asked for their案解析一7.向东南方驶去opinions about a series of advertisements(advertisement).8.持续…4.My father is one of the most famous9.继续下一段旅程photographers(photographer),and he has won many10.游览这个城市national prizes for his photos.11.take sb's breath away with its exceptional beauty5.Our language is filled with.idioms (idiom)whick may12.beautiful cobblestone streets③make no sense to you if you haven't learned them.13.古老的砖建筑14.蒙特利尔的红枫叶山根据汉语提示补全下列句子，每空一词。l5.be typical of.…1.Contrary to(与…相反)the16.a short distance awayexpectations of their parents,the children behaved17.a bunch of farmsbravely in the hiking18.in an urban area2.Lily sat down and proceededto详情请参考19.all in alltell(进而告诉)me about her skiing holiday20.have a few hours to kill3.In the TV interview,the coach owedthevictoryto_(把胜利归功于)the team spirit..4.Incontrastto(与…形成对比)案解析21.站在远处22.驶过23.有空做某事her elder brother,Mary is always considerate in her24.与…形成对比treatment of others.25.说英语有口音5.Many cars and trucks rolledby(驶过26.一个拥有绝妙风景和声音的城市gbut no one gave us a lift.本期报纸其他版块参考答案1版详情请TOPIC READING4版①对于那些想要品尝这座城市最美味菜肴的人来说，蒙特利尔举世闻名的美食界将是一个巨大详情请参考答案解析完形填空1-5 BDCAB 6-10 ADCBD的吸引力。11-15ACDBC答案解析②即使你没有计划，仅仅在风景优美的鹅卵石街道上漫步也是值得的。阅读理解1-4 CBDALISTENING PRACTICE阅读填空1-5 BCABC6-10 ABABA1-5 DGCBF11-15 BABAC16-20 ACBCA摩豆2版MIND MAP1.from Vancouver to Toronto详情请参考答案解析2.the massive mountains and forests of Canada3.took their breath away with its exceptional beauty4.bound for Jasper5.spectacular mountain peaks and forests and manydifferent creatures6.Canada's huge oil and gas drilling industry7.many shopping malls8.they travelled through the night9.a land of forests and lakes10.Lake HuronINTO THE TEXTSAB详情请参1.enjoying1.proceeded2.an2.astonished3.to take3.which答案解析4.where4.had moved5.its5.with6.creatures6.talking7.stops7.were8.to8.an9.truly9.themselves10.that10.happily2

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走路。但她不仅完成了学业还积31,D。作手法题。根据文章最后一段可知。MIT的经济学家David Autor以及普林所頓的Janet语言运用为残疾人争取应得的权益地第一节Cuie都认为送礼物不能只考虑经济方面的因素，这组作者用了们的原话，做选D项文的类是记叙文，主题境为人与文主y,a condition where certain nerve本又的语周类蛋是说明又，王题的境为人与社4.C。根据Life skills or social skills are rarely复印时请沿此处对折s及Hor可知，在大部分学校58.a。此处表示泛指，且ink以轴音因素开头Opera to Huangmei Opera.技能很少被重视，故填aIf you are interested,let's meet in front of the center非常注重培养学生的生活技能或59.engagement。空白处所填词在句中作主语，at 1:40 pm that afternoon.I'm looking forward to your故填engagel的名词形式。early reply.cal as teaching sd o multiply and60.which。关系代词which指代前面整个主句的Yours,important life skills children should内容，引导非限制性定语从句，并在从句中作主语Li Huascm鼓易学生掌这些技能】61.analyzed。这里讲的是过去的事，故用一2过第二节skills or social skills are rarely去时【写作提示】launched the"Kindness Project"2.participant5。根据空前的数字18，I54可知，这本文的语篇类型是记叙文，主题语境是人与自位老师讨论了她的担忧里需用participate的名词复数形式。然。Mowgli州出现在我们家时，Abby对他充满了敌Kindness Project'”及下文对该项63,was asked。主语Everyone,是谓语动词动作ask意。后来，两只篇友好相处上个项目与传插善意有关一起玩要、睡觉。的承受者，而且是第三人称单数形式：又因为这里讲天，Abby一反常态，一直喊叫，向“我”求助，在“我could be that spark of kindness的是过去的事情，故填was asked.的描述可知，Thiessen认为，的帮助下，教助了地的小伙件Mowgli。64,using。usc与逻辑主语hose之间是主动关系花，我们就可以藏励其他人做根据第一段所给的段首句可知，Abby设法引起故用/ng形式，作后置定语我"的注意。“我明白Aby为什么一反常态了吗？结65.han。根据空前的less可知，空白处应填连词合第二段的首句可知，Mo2被困在了个黑色塑料

Try it yourself.Here's a list of random words-just the sort of information that's used to test would-be memory champions. But don't just read the words.37 MOUNTAIN,RAINBOW,PEA,SOFA. SHEEP,SNOWMAN,WINDMILL, NEWSPAPER,PIANO,UMBRELLA As images,rather than words,these items will stay longer in your short-term memory.38,you'll boost your chances of achieving even longer-term learning. Fire up your visual memory and get your brain buzzing.No- tice the relative sizes of the items on the list.Look out for any similarities or differences in shapes,colors or textures.And ask yourself if any of the words fall into obvious pairs or patterns.

第二节（满分25分） 阅读下面材料，根据其内容和所给段落开头语续写两段，使 之构成一篇完整的短文。 Mr Dawson was an old grouch,and everyone in town knew it.Kids knew not to go into his yard to pick a delicious apple. Old Dawson,they said,would come after you with his gun. One Friday,12-year-old Janet was going to stay all night with her friend Amy.They had to walk by Dawson's house on the way to Amy's house,but as they got close,Janet saw him sitting on his front porch and suggested they cross over to the other side of the street.Like most of the children,Janet was scared of the old man. Amy said not to worry.Mr Dawson wouldn't hurt anyone.

【答案】 I have some good news for you,Simon.Some volunteer volunteers from all over the world are needing for the Olympic Winter needed Games in Beijing.The following is some requirements you are should meet.To be A Olympic volunteer,you must have a good an command of Chinese and English.Since you have been learning Chinese in America,you have an advantage over others in lan- guage.Beside you are enthusiastic,optimistic and active,that Besides which satisfies the demands for volunteers well.You will definitely de-

inconvenient and I was never going to use them again.Little did she know this would lead her to start up her own company. In 2013,Apidura was born,producing storage solutions for people looking to traveling the world by bike,racing across con- tinents.Therefore,they can carry all they need to do so.It's now a successful global brand,but Fahey remains reflective a- bout what else the company can do for people. 24.Why did Fahey leave her job in the oil industry? A.She got fed up with her job. B.She wanted to explore something new. C.She was desperate to start her own business. D.She found it hard to adjust to the circumstances.

19.(12分)如图，四棱锥P-ABCD中，底面ABCD是行四边形，AB=1,BC=2,∠ABC=60,PC⊥CD,M为棱PA的中点.(1)证明：PA⊥CD;A0-09(2)若PA1AC,二面角P-CD-A的大小为60°，求直线MD与面PCD所成角的正弦值，(乃)y.120.(12分)已知在面直角坐标系x0y中，抛物线C:)2=2px(p>0)的焦点为F,过点P(0,3)的直线l与C交于A,B两点，且tan∠PF0=3.(1)求C的标准方程；(2)已知E为x轴上的点，直线EA与C的另一个交点为M,直线EB与C的另一个交点为N,当直线MN的斜率为1时，求点E的坐标。y=-3X+3X年719%4X99X-22121.(12分)已知函数f(x)=e-ax-lnx-1.(1)当a=e-1时，求f(x)的单调区间；心7mtXN≥2.(2)若f(x)存在零点，求实数a的取值范围。x:e=mx)x-(e-0'Inx100Xn汁e)哦Xexes mxe'x)mxexthx feInxr alnee'x+元0exalne"=x+mx +hx.22.(12分)现有甲、乙两个不透明盒子，盒子装有2个红球和2个白球，乙盒子装有4个白球，这些球的大小、形状、质地完全相同，在一次球交换过程中，从甲盒子与乙盒子中各随机选择1个球进行交换，重复几次这样的交换过程后，甲盒子里装有红球的个数为X(1)求X2的概率分布及数学期望；(2)求P(X.=1).PlXn+60ED用1甲堂材4奇(四@x烟+和动+数收x②包②甲冰X()

less compared with migratory(迁移的)animals such as birds. "It's an insight into how they build up their picture of space, adds Richard Holland,a biologist at Bangor University who studies bird navigation. There were already indications that dogs-like many ani- mals,and maybe even humans-can sense Earth's magnetic field.In 2013,Hynek Burda,a sensory ecologist at the Czech U- niversity of Life Sciences Prague who has worked on magnetic re ception for 3 decades,and his colleagues showed dogs tend to o- rient themselves north-south while excreting ()Because this behavior is involved in marking and recognizing field,Burda reasoned the line-up helps dogs figure out the location relative e to other spots.But fixed line-up isn't the same thing as navigation.

答案：61.it62.easily63.to please64.a6 65.pushed 66.where 67.choice 68.pipes 69.at 70.was informed

【答案】56.on57.whose58.to use59.interesting 60.have learnt/learned 61.newly 62.Known 63.was invented 64.the 65.appreciation

【答案】l.criminal2.with3.be converted4.frightening 5.trying 6.simplified 7.sounds 8.making 9.variety 10.since

tower struck two when she arrived. (Text 3) W:Do you have something to write with?How am I supposed to sign my name?Can I use a pencil? M:No,we lost our electronic pen.It doesn't matter,though. You can use your finger to sign right on the screen. (Text 4) M:You look sad.What's the matter with you? W:I went hiking yesterday.The mountains and the weather re- minded me of my hometown. M:I'm sorry to hear that.Why not give your family a call? (Text 5) M:I didn't see you last night at the office.Are you OK?