2016-2017学年山东省泰安市高一(下)期末数学试卷与解析word
山东省泰安市2016-2017学年高一物理下学期期末试卷(含解析)
山东省泰安市2016-2017学年高一下学期期末考试物理试题一、选择题:共12小题,每小题4分,在每小题给出的四个选项中,第1~7题只有一项符合题目要求,第8~12题有多项符合题目要求,全部选对得4分,选对但不全的得2分,有选错的得0分1. 一个做匀速直线运动的质点,突然受到一个与运动方向垂直的恒力作用时,且原来作用在质点上的力不发生改变,关于质点的运动说法正确的是A. 一定做直线运动B. 一定做匀变速运动C. 可能做直线运动,也可能做曲线运动D. 可能做匀速圆周运动【答案】B【解析】试题分析:一个做匀速直线运动的物体,突然受到一个与运动方向垂直的恒力作用时,物体的运动轨迹是曲线,由于力是恒力,故加速度恒定,故物体做匀变速曲线运动,选项B正确,AC错误;匀速圆周运动的物体所受的合力大小不变,方向不断变化,故此物体受恒力作用时不可能做匀速圆周运动,选项D错误;故选B.考点:曲线运动【名师点睛】此题考查了曲线运动的条件,当物体受到与速度不共线的力作用时,物体做曲线运动;当力是恒力时,物体做匀变速曲线运动;记住两种特殊的曲线运动:平抛运动和匀速圆周运动的运动特点和受力特点.2. 如图所示,一小船位于100m宽的河的正中央A点处,从这里向下游m处由一危险区,当时水流速度为6m/s,为了使小船避开危险区直线到达对岸,那么小球航行的最小速度(静水中)为A. 2m/sB. m/sC. 4m/sD. 3m/s【答案】D【解析】为了使小船避开危险区直线到达对岸,则最大位移为:,因此设小船能安全到达河岸的合速度与水流速度的夹角为θ,即有,解得:θ=30°,流水速度已知,则可得小船在静水中最小速度为,故ABC错误,D正确。
3. 如图所示,绳子一端拴着物体M,另一端绕过滑块系在水平向左运动的小车的P点,图示时刻滑轮左侧的绳子与水平方向成,则A. 若小车匀速运动,则M加速上升B. 若小车匀速运动,则M减速上升C. 若小车做加速运动,则M匀速上升D. 若小车做加速运动,则M减速上升【答案】A【解析】设绳子与水平方向的夹角为θ,绳子的瞬时速度大小为v A.将小车的运动分解为沿绳子方向的运动,以及垂直绳子方向的运动,则可得:v A=vcosθ,若小车匀速向左,即v不变,而θ减小,则cosθ增大,故v A增大,即物体向上做加速运动,故A正确,B错误;若小车做加速运动时,由v A=vcosθ可知,v 增大,θ减小,则cosθ增大,故v A增大,物体M一定加速上升,故CD错误。
2016-2017学年山东省泰安市高二下学期期末数学试卷(理科)(解析版)
2016-2017学年山东省泰安市高二下学期期末数学试卷(理科)(解析版)2016-2017学年山东省泰安市高二(下)期末数学试卷(理科)一、选择题(共12小题,每小题5分,满分60分)1.(5分)若大前提是:任何实数的平方都大于0,小前提是:a∈R,结论是:a2>0,那么这个演绎推理()A.大前提错误B.小前提错误C.推理形式错误D.没有错误2.(5分)已知复数z=(i为虚数单位),则z在复平面内对应的点位于()A.第一象限B.第二象限C.第三象限D.第四象限3.(5分)函数f(x)=2lnx+的单调递减区间是()A.(﹣∞,]B.(0,]C.[,1)D.[1,+∞﹚4.(5分)已知随机变量X服从正态分布N(3,1),且P (2≤x≤4)=0.6826,则P(x>4)=()A.0.1588 B.0.1587 C.0.1586 D.0.15855.(5分)设复数z满足(1+i)z=2i,则|z|=()A.B.C.D.26.(5分)下列四个命题正确的是()①在线性回归模型中,是x+预报真实值y的随机误差,它是一个观测的量②残差平方和越小的模型,拟合的效果越好③用R2来刻画回归方程,R2越小,拟合的效果越好④在残差图中,残差点比较均匀地落在水平的带状区域中,说明选用的模型比较合适,若带状区域宽度越窄,说明拟合精度越高,回归方程的预报精度越高.A.①③B.②④C.①④D.②③7.(5分)已知函数f(x)=2ln x﹣xf′(1),则曲线y=f(x)在x=1处的切线方程是()A.x﹣y+2=0 B.x+y+2=0 C.x+y﹣2=0 D.x﹣y﹣2=08.(5分)把一枚硬币任意抛掷三次,事件A表示“至少一次出现反面”,事件B 表示“恰有一次出现正面”,则P(B|A)值等于()A.B.C.D.9.(5分)某车间加工零件的数量x与加工时间y的统计数据如表:现已求得上表数据的回归方程中的值为0.9,则据此回归模型可以预测,加工100个零件所需要的加工时间约为()A.84分钟B.94分钟C.102分钟D.112分钟10.(5分)甲、乙、丙、丁四位同学一起去问老师询问成语竞赛的成绩.老师说:你们四人中有2位优秀,2位良好,我现在给甲看乙、丙的成绩,给乙看丙的成绩,给丁看甲的成绩.看后甲对大家说:我还是不知道我的成绩.根据以上信息,则()A.乙可以知道四人的成绩B.丁可以知道四人的成绩C.乙、丁可以知道对方的成绩D.乙、丁可以知道自己的成绩11.(5分)若甲乙两人从A,B,C,D,E,F六门课程中选修三门,若甲不选修A,乙不选修F,则甲乙两人所选修课程中恰有两门相同的选法有()A.42种B.72种C.84种D.144种12.(5分)已知函数f(x)的定义域为[﹣2,6],x与f(x)部分对应值如表,f(x)的导函数y=f(x)的图象如图所示.下列结论:①函数f(x)在(0,3)上是增函数;②曲线y=f(x)在x=4处的切线可能与y轴垂直;③如果当x∈[﹣2,t]时,f(x)的最小值是﹣2,那么t的最大值为5;④?x1,x2∈[﹣2,6],都有|f(x1)﹣f(x2)|≤a恒成立,则实数a的最小值是5,其中正确结论的个数是()A.1个 B.2个 C.3个 D.4个二、填空题(共4小题,每小题5分,满分20分)13.(5分)抛物线y=x﹣x2与x轴所围成图形的面积为.14.(5分)将编号为1,2,3,4的四个小球放入3个不同的盒子中,每个盒子里至少放1个,则恰有1个盒子放有2个连号小球的所有不同放法有种.(用数字作答)15.(5分)观察下列式子:,,,…,根据以上规律,第n个不等式是.16.(5分)设函数f′(x)是奇函数f(x)(x∈R)的导函数,f(﹣1)=0,当x >0时,xf′(x)﹣f(x)<0,则使得f(x)>0成立的x的取值范围是.三、解答题(共5小题,满分60分)17.(12分)已知n∈N*,在(x+2)n的展开式中,第二项系数是第三项系数的.(1)求n的值;(2)求展开式中二项式系数最大的项;(3)若(x+2)n=a0+a1(x+1)+a2(x+1)2+…+a n(x+1)n,求a0+a1+…+a n的值.18.(12分)某校为了解高二年级不同性别的学生对取消艺术课的态度(支持或反对),进行了如下的调查研究,全年级共有1350人,男女生比例为8:7,现按分层抽样方法抽取若干名学生,每人被抽到的概率均为,通过对被抽取学生的问卷调查,得到如下2×2列联表:(1)完成2×2列联表;(2)根据以上列联表进行独立性检验,能否在犯错误的概率不超过0.005的前提下认为“态度与性别有关?”参考公式及临界值表:K2=.19.(12分)已知数列{a n}满足S n+a n=2n+1.(n∈N*)(1)求出a1,a2,a3的值;(2)由(1)猜测a n的表达式,并用数学归纳法证明所得结论.20.(12分)某批产品成箱包装,每箱5件,一用户在购进该批产品前先取出3箱,再从每箱中任意出取2件产品进行检验.设取出的第一、二、三箱中分别有0件、1件、2件二等品,其余为一等品.(1)用ξ表示抽检的6件产品中二等品的件数,求ξ的分布列及ξ的数学期望;(2)若抽检的6件产品中有2件或2件以上二等品,用户就拒绝购买这批产品,求这批产品被用户拒绝的概率.21.(12分)已知函数f(x)=ln(ax+1)﹣ax﹣lna.(1)讨论f(x)的单调性;(2)若f(x)<ax恒成立,求a的取值范围;(3)若存在﹣<x1<0,x2>0,使得f(x1)=f(x2)=0,证明x1+x2>0.四、选修4-4:坐标系与参数方程22.(10分)在直角坐标系xOy中,以O为极点,x轴正半轴为极轴建立极坐标系,圆C的极坐标方程为ρ=4sinθ,直线l的参数方程为(t为参数),直线l和圆C交于A、B两点.(1)求圆心的极坐标;(2)直线l与x轴的交点为P,求|PA|+|PB|.五、选修4-5:不等式选讲23.已知函数f(x)=|2x+1|,g(x)=|x|+a(Ⅰ)当a=0时,解不等式f(x)≥g(x);(Ⅱ)若存在x∈R,使得f(x)≤g(x)成立,求实数a的取值范围.2016-2017学年山东省泰安市高二(下)期末数学试卷(理科)参考答案与试题解析一、选择题(共12小题,每小题5分,满分60分)1.(5分)若大前提是:任何实数的平方都大于0,小前提是:a∈R,结论是:a2>0,那么这个演绎推理()A.大前提错误B.小前提错误C.推理形式错误D.没有错误【分析】分析该演绎推理的大前提、小前提和结论,可以得出正确的答案.【解答】解:∵任何实数的平方大于0,因为a是实数,所以a2>0,其中大前提是:任何实数的平方大于0是不正确的,因为a=0时,a2=0,此时a2>0不成立,所以大前提是错误的,致使得出的结论错误.故选:A【点评】本题考查了演绎推理的应用问题,解题时应根据演绎推理的三段论是什么,进行逐一判定,得出正确的结论,是基础题2.(5分)已知复数z=(i为虚数单位),则z在复平面内对应的点位于()A.第一象限B.第二象限C.第三象限D.第四象限【分析】直接由复数代数形式的乘除运算化简复数z,求出z在复平面内对应的点的坐标,则答案可求.【解答】解:z==,则z在复平面内对应的点的坐标为:(,),位于第三象限.故选:C.【点评】本题考查了复数代数形式的乘除运算,考查了复数的代数表示法及其几何意义,是基础题.。
山东省泰安市高一下学期期末考试数学试题含答案
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山东省泰安市2016-2017学年高一上学期期末考试数学试题
20. (本小题满分 13 分) 为振兴经济发展,某市 2017 年计划投入专项资金加强旅游基础设施改造. 据调查,
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2016-2017学年山东省泰安市高一(下)期末英语试卷
2016-2017学年山东省泰安市高一(下)期末英语试卷第一部分听力(共两节,满分30分)1.(1.5分)What are the speakers talking about?A.The term paperB.Touring resourcesC.A trip to China.2.(1.5分)What does the woman mean?A.She feels very hungry.B.The man ate all the food.C.The refrigerator needs cleaning.3.(1.5分)Where does the conversation take place?A.In a hotel B.In a hospital C.At Harry's home.4.(1.5分)What does the woman advise the man to do?A.Go to work by carB.Have a quick breakfastC.Do morning exercise.5.(1.5分)At what time did the woman first wake up the man?A.7:20B.7:30C.7:40.6.(3分)听下面一段对话,回答第6至第7两个小题.6.Why does the man refuse the woman at first?A.He will have a visitorB.He will travel to New YorkC.He will meet his sister in Los Angeles.7.When will the speakers have a meal together?A.Next Wednesday B.Next Saturday C.This Saturday.7.(3分)听下面一段对话,回答第8和第9两个小题.8.How did Linda know about Mr.Lee's arrival?A.By Mr.Lee's callB.By Mr.Smith's callC.By Mr.Smith's letter9.Where will the speakers meet?A.In the hotel B.At Linda's home C.In the man's office.8.(4.5分)听下面一段对话,回答第10和第12三个小题.10.How will the woman go to the airport?A.By taxi B.By bus C.By car11.Where will the woman stay in London?A.At a hotel B.At Betty's home C.In a college dormitory 12.Who is Thomas?A.Joe's best friend B.The man's teacher C.Betty's brother.9.(6分)听下面一段对话,回答第13至第16四个小题.13.How does the man find his work?A.Boring B.Enjoyable C.Challenging14.How long is he lunch break now?A.Two hours B.One hour C.Half an hour15.What does the man have more opportunities to do?A.Learn new skillsB.Exercise in the gymC.Go out with colleagues.16.Why does the man still work here?A.He can travel a lotB.He gets a good salaryC.He can work on his own.10.(6分)听下面一段对话,回答第17至第20四个小题.17.What is on the first floor?A.A library B.A music store C.A small café18.What should only be used in the library?A.DVDs B.Grammar books C.Textbooks19.What does the speaker say about the computer room?A.It's often crowdedB.It's modern and largeC.It's next to he library20.What is the plan for this Saturday?A.Holding a party in the caféB.Visiting Susan in a castleC.Having a trip to Warwick.第二部分阅读理解(共两节)第一节(满分30分)阅读下面短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡上将该项涂黑.11.(6分)There are about 52 theme parks in Japan.Today we mainly talk about three famous theme parks among them.Nikko Edo VillageNikko Edo Village is a theme park opened in Tochigi prefecture (县)in 1986that offers an amazing experience of Edo﹣period culture and lifestyle.A town scenery from the mid﹣Edo period is rebuilt within the park,and among attractions are live Edo festival parades.Universal Studios JapanLocated in Osaka,this park features Hollywood films.One of the two largest theme parks in Japan,along with Tokyo Disney Resort,it is the third theme park operated by Universal Studios and the first outside the United States.At first,the park was to have been named"Universal Studios Osaka,"but this name was not used because its abbreviation (缩写)USO would have been pronounced like the Japanese word uso,which means"lie."The park offers attractions on the theme of motion pictures,with rides such as Sesame Street,Shrek,E.T.,Terminator,Spiderman,etc.Tokyo Disney ResortOpened in the city of Urayasu,Chiba prefecture in 1983 as the first Disneylandoutside the United States,Tokyo Disneyland lies on 600,000 square meters of reclaimed land(填海造陆).In 2001,Tokyo DisneySea was opened next to Tokyo Disneyland,with the seas as its theme.This park,Tokyo Disneyland,and neighboring hotels and shopping centers together make up the Tokyo Disney Resort,which brings in more than 25 million visitors every year.Tokyo Disney Resort lies close to Tokyo and other major cities with huge populations,and has easy access to the New Tokyo International Airport in the city of Narita Chiba prefecture.Apart from this,its great success also lies in the fact that new attractions have been opened one after another,thus winning the support of many repeat visitors.21.In which park can you enjoy the live performance?A.Nikko Edo VillageB.Universal Studios JapanC.Tokyo DisneySeaD.Tokyo Disney Resort22.Which of the following is not included about Universal Studios Japan?A.Its locationB.Its attractionsC.Its nameD.Its history23.What can we know about Tokyo Disney Resort?A.It is the first Disneyland in the worldB.It is made up of two partsC.It is becoming more popularD.It is not easy to get to.12.(8分)Mom and businessman Jaimee Newberry founded"Picture This"﹣a new company that allows kids to turn their drawings into dresses.The process is simple:Parents choose a dress size and print out the coloring book﹣style models available on the"Picture This"website.Once their kids have colored and decorated the models,the grown﹣ups can upload photos of the completed designs on the website and place their orders.The finished dresses arrive within a few weeks."Picture This"was inspired by a dress Newberry made for her daughter,Zia,inspired by her artwork.In a Medium post detailing he history of"Picture This",Newberry wrote that Zia loved the dress and told people,"I'm wearing my imagination!""Due to the positive response and requests from Zia's friends and classmates,Ken,Igi,Stephen and I chatted about how to turn this idea into something where kids everywhere could have fun with hands﹣on drawing and coloring,and then see their imaginative artwork come to life in wearable fashion form,"Newberry explained.In addition to kid﹣sized dresses,"Picture This"also allows kids to design dresses for their dolls.And although the service currently only offers dresses,they have plans to expand the clothing choices.For now,Newberry invites families to try out the service and post photos of their dresses on social media.Based on he various kinds of kid art in the world,it's clear these dresses will certainly be unique.24.What chances does"Picture This"give to kids?A.To learn the latest fashionB.To design their own clothesC.To take photos of themselvesD.To discuss ideas with top designers25.How did Zia friends react to the dress her mother made for her?A.They spoke highly of itB.They requested Zia to sell itC.They showed no interest in itD.They couldn't stand it.26.What do we know about"Picture This"?A.It has branched out into grown﹣ups'wearB.It lets its customers'imagination run wildC.It was first created by Newberry's daughterD.Most of its models are designed by Newberry.27.What's the author's attitude towards the future of"Picture This"?A.Worried B.Uncertain C.Hopeful D.Doubtful.13.(8分)At 23,I was fresh out of graduate school and working in a nursing home,trying to decide my next path in life.My job involved wheeling residents(居民)to the community hall for activities.Elizabeth would wave from her darkened room but refuse to join the gatherings.Nearly blind,and requiring oxygen,she never left her bedside.I soon learned,though,that she loved books,and every day after work I would read to her.In dim light we made our way through"King Lear,""Henry IV,""Jane Eyre,"the poems of Rupert Brooke.Two golden hours might pass before I'd pack up to return to my apartment.Before I could leave she'd press my hand,saying,"Child﹣my literary child.You bring me such joy."Elizabeth's husband had died ten years earlier,and their only child,a daughter,was estranged(疏远)for what heartbreaking reason I never knew.One day an old friend of hers visited and brought her some soup.Smiling broadly,Elizabeth squeezed my arm."Tomorrow,child,we shall feast."The next evening I found Elizabeth's bed empty."I'm sorry,"the nurse whispered.She handed me a box and nodded."She left everything to you."At home,I unpacked it,finding two white sweaters,the dozen leather﹣bound books and,at the bottom,the can of soup.That summer I decided my path.I returned to school to study literature(文学).And for 26years the soup has stayed in my kitchen.It's remained unopened,but the memories are preserved.28.Why did Elizabeth refuse to join the gatherings?A.She had many books to read.B.She was not a very social person.C.She was limited in her movement.D.She had no interest in those activities.29.What do we know about Elizabeth?A.She loved writing poems.B.She often visited her friends.C.She got divorced ten years ago.D.She had little communication with her daughter.30.What can we know about the author?A.She used to be doctor.B.She was inspired by Elizabeth.C.She taught literature for 26 years.D.She didn't like the taste of the soup.31.What would be the best title for the text?A.A book﹣loving friendB.An unforgettable literary journeyC.An interesting nursing experienceD.A short﹣term job and its lifelong influence.14.(8分)The 2016State of North America's Birds report was published by the North American Bird Conservation Initiative(NABCI)last Wednesday at the Museum of Nature in Ottawa,Canada.The report﹣for the first time﹣assesses(评估)conservation status of 1,154 native bird species that occur in Canada,the continental United States,and Mexico,as well as oceanic birds that occur off these three countries.However,the findings were distressing.Over one﹣third of all North America bird species are most at risk of extinction without significant conservation action."North American migratory birds(候鸟)are on the decline (下降).But these birds link us,they unite us,and we have a shared duty to them and to the environmentsthey are closely tied in with,so it requires international teamwork,"said Christian Artuso,a biologist at Bird Studies Canada."This will come back to bite us if we don't deal with it while we still have a chance."The threat to bird populations has brought nations together to try and save them from extinction."Canada,the United States,and Mexico share an amazing wealth of birds.And not one of them carries a passport,"said Catherine McKenna,Canadian federal Environment and Climate Change Minister."Partnerships like this allow us to‘spread our wings'beyond our own nests."This week policymakers,scientists,and nonprofit leaders met in Ottawa,Canada,to discuss the results of the study and how to increase conservation efforts in the continent.The authors recommend various ways to take action to save the homes of at﹣risk birds.For seabirds,the report suggests expanding protected areas in the sea,signing agreements to cut plastics pollution,managing fisheries to protect fish populations upon which the birds feed,and making sure the birds do not get caught in fishing lines or nets."The thing about migratory birds is they connect us.What we do up here in Canada affects what goes on down in the southern US and Mexico and even further beyond,throughout the whole hemisphere(半球),"said Artuso.32.What does the underlined word"distressing"in the first paragraph mean?A.BoringB.ExcitingC.UpsettingD.Interesting33.What does the teamwork mentioned by Artuso probably aim to do?A.Study bird speciesB.Protect migratory birdsC.Help international biologistsD.Create a competitive environment34.What can we infer about Mckenna's words?A.She wanted birds to fly beyond their nests.B.She was curious about birds in the three countriesC.She hoped the three countries could work togetherD.She believed passports were sometimes unnecessary35.How is Paragraph 5 mainly developed?A.By providing examplesB.By giving descriptionsC.By analyzing causesD.By making comparisons.第二节(满分10分)根据短文内容,从短文后的选项中选出能填入空白处的最佳选项.选项中有两项为多余选项.15.(10分)As we all know,it is very difficult to remember all the contents of a long passage.For that reason,it is wise to make notes of information that is necessary for the students when they read a passage.The result is a short of the passage,and it contains all aspects of the passage.(36)I ask the students to follow these steps.●Familiarize with(通晓)the material.After students have read the passage or a section of it,they can start summarizing.(37)●Select important information.I ask the students to go through each paragraph,sentence by sentence,asking themselves which information is necessary to the argument.They should point out complete sentences as much as possible.(38)Pay attention to these important points:author,title,reason why the passage was written,purpose,theme,key words,link words,all major aspects,explanations and author's opinion.●Paraphrase(释义)the information.I ask the students to point out the information of the previous step in their own words.(39)They should try to shortenlong and complex sentences into much shorter ones.●(40)Let students make sure that the connection between sentences is clear and reasonable and that each group of sentences smoothly fit in one paragraph.A.Adjust the length of the summaryB.Insert links(连接词)between sentences and paragraphs.C.A choice is to underline important sentences or phrases.D.In this way students can grasp the main ideas of the passage.E.But we know reading is a practice of long period and we must have a lot of practiceF.The length of the section read through depends on the structure and the complexity(复杂)of the passage.G.And writing down information in their own words forces them to completely understand what they are writing down.第三部分:英语知识运用(共两节)第一节完形填空(满分30分)阅读下面短文,从短文后各题所给的四个选项(A、B、C和D)中,选出可以填入空格处的最佳选项,并在答题卡上将该项涂黑.16.(30分)Several years ago,I decided to change my job and attended an interview.During the interview,the interviewer covered the expected(41)about my work history and education.Then,he asked,"What event or accomplishment in your life has made you the (42)?"I paused for a moment,and told him my proudest moment wasn't anything I did,(43)something my daughter did ten years before.They I told him the story of Julie's (44).Many years earlier,my brother(45)from St.Louis,telling me that my mom wouldn't receive her benefits for several months.(46),she would have to live off her small savings.At the supper table that evening,I told my husband I was going to send Mom some(47).Our conversation was cut short by a phonecall.A neighbor(48)Julie to babysit(照看婴儿).At fourteen,Julie was always looking for ways to(49)money.The following morning,she (50)me an envelope.When I looked at the(51)and saw it was for my mom,I gave her a big hug.I told her how proud I was of her for taking the time to (52)her grandma.She smiled.A week later,my brother called again,thanking me for the check and telling me how Mom cried when she got Julie's (53).He told Julie had (54)her grandma the five dollars she had earned babysitting.In her letter,she told Grandma to (55)it on whatever she needed.I continued,"I know that isn't really a job (56),but that's what made me the proudest in my life."A week later,I was given the(57).My boss told me after hearing about my story,he(58)I was the type of employee he wanted to(59)in his organization.Julie's simple act of (60)had paid off.41.A.doubts B.stories C.discussions D.questions 42.A.proudest B.strongest C.happiest D.luckiest 43.A.and B.nor C.but D.even 44.A.wish B.gift C.bravery D.secret 45.A.called B.travelled C.drove D.shouted 46.A.However B.Otherwise C.Still D.Therefore 47.A.books B.food C.money D.presents 48.A.wanted B.allowed C.advised D.encouraged 49.A.borrow B.save C.waste D.earn 50.A.bought B.handed C.posted D.returned 51.A.address B.stamp C.title D.message 52.A.visit B.writer C.thank D.miss 53.A.picture B.phone C.letter D.card 54.A.awarded B.brought C.lent D.sent55.A.change B.put C.spend D.invest 56.A.opportunity B.accomplishment C.application D interview 57.A.job B.bill C.prize D.welfare 58.A.promised B.decided C.imagined D.agreed 59.A.play B.follow C.compete D.work 60.A.patience B.envy C.love D.gratitude第二节(满分15分)阅读下面材料,在空白处填入适当的内容(1个单词)或括号内单词的正确形式.17.(15分)Once,three men got (61)(lose)in the forest.They decided they would stay in the forest until they found(62)(they)way.The next morning,one man went to find some food.Soon,the other two men were(63)(astonish)to find him back with a deer and asked how he got the deer.The man replied,"I found tracks,I followed the tracks,and I got a deer."They both were (64)(slight)confused because he had no weapons.A few days (65)(late),the second guy went in search (66)food and soon came back with a deer too.The other two asked how he managed (67)(get)the deer.His reply was(68)same as the first man's.then it was the turn of the third guy to search for food.Many hours passed,and the third man (69)(hold)nothing in his hands came back,with blood on his face.The other two asked him (70)had happened.He looked at them and relied,"I found tracks,I followed the tracks,and I got hit by a train."第四部分写作(共三节)第一节单词拼写(共5小题;每小题1分,满分5分)根据所给首字母或汉语提示,结合句意,写出空缺处名单词的正确形式.18.(1分)The scientists are(探索)every part of the island at present.19.(1分)Please decide whether the following sentences are true or f.20.(1分)The(观众)were shocked by the performance of the disabled athlete.21.(1分)What i me most was the professor's humor and wisdom.22.(1分)Prices have risen steadily during the past(十年).第二节:单句改错(共5小题;每小题1分,满分5分)下列每个句子均有一处错误,错误涉及一个单词的增加、删除或修改,请找出并按要求加以改正.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:在错的词下画一横线,并在该词下面写出修改后的词.23.(1分)They decided to fly to Chongqing rather than took the train..24.(1分)Getting rid of hunger are very important for some African countries..25.(1分)Today we're going to focus the question of homeless people..26.(1分)We have to pay the rent two weeks in the advance this term..27.(1分)We all appreciate a balance diet and a positive attitude to life..第三节书面表达(满分25分)28.(25分)假设你是某中学学生会主席李华.上周,你校邀请美国某大学的史密斯教授来校做了一场关于各国身势语的专题讲座.请你代表你校全体学生,用英语给他写一封信,内容包括:1、表示感谢;2、你的收获.注意:1.词数100左右2.可适当增加细节,以使行文连贯..2016-2017学年山东省泰安市高一(下)期末英语试卷参考答案与试题解析第一部分听力(共两节,满分30分)1.(1.5分)What are the speakers talking about?A.The term paperB.Touring resourcesC.A trip to China.【解答】A2.(1.5分)What does the woman mean?A.She feels very hungry.B.The man ate all the food.C.The refrigerator needs cleaning.【解答】B3.(1.5分)Where does the conversation take place?A.In a hotel B.In a hospital C.At Harry's home.【解答】B4.(1.5分)What does the woman advise the man to do?A.Go to work by carB.Have a quick breakfastC.Do morning exercise.【解答】C5.(1.5分)At what time did the woman first wake up the man?A.7:20B.7:30C.7:40.【解答】B6.(3分)听下面一段对话,回答第6至第7两个小题.6.Why does the man refuse the woman at first?A.He will have a visitorB.He will travel to New YorkC.He will meet his sister in Los Angeles.7.When will the speakers have a meal together?A.Next Wednesday B.Next Saturday C.This Saturday.【解答】AB7.(3分)听下面一段对话,回答第8和第9两个小题.8.How did Linda know about Mr.Lee's arrival?A.By Mr.Lee's callB.By Mr.Smith's callC.By Mr.Smith's letter9.Where will the speakers meet?A.In the hotel B.At Linda's home C.In the man's office.【解答】CA8.(4.5分)听下面一段对话,回答第10和第12三个小题.10.How will the woman go to the airport?A.By taxi B.By bus C.By car11.Where will the woman stay in London?A.At a hotel B.At Betty's home C.In a college dormitory 12.Who is Thomas?A.Joe's best friend B.The man's teacher C.Betty's brother.【解答】CBC9.(6分)听下面一段对话,回答第13至第16四个小题.13.How does the man find his work?A.Boring B.Enjoyable C.Challenging14.How long is he lunch break now?A.Two hours B.One hour C.Half an hour 15.What does the man have more opportunities to do?A.Learn new skillsB.Exercise in the gymC.Go out with colleagues.16.Why does the man still work here?A.He can travel a lotB.He gets a good salaryC.He can work on his own.【解答】BCAB10.(6分)听下面一段对话,回答第17至第20四个小题.17.What is on the first floor?A.A library B.A music store C.A small café18.What should only be used in the library?A.DVDs B.Grammar books C.Textbooks 19.What does the speaker say about the computer room?A.It's often crowdedB.It's modern and largeC.It's next to he library20.What is the plan for this Saturday?A.Holding a party in the caféB.Visiting Susan in a castleC.Having a trip to Warwick.【解答】ABAC第二部分阅读理解(共两节)第一节(满分30分)阅读下面短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡上将该项涂黑.11.(6分)There are about 52 theme parks in Japan.Today we mainly talk about three famous theme parks among them.Nikko Edo VillageNikko Edo Village is a theme park opened in Tochigi prefecture (县)in 1986that offers an amazing experience of Edo﹣period culture and lifestyle.A town scenery from the mid﹣Edo period is rebuilt within the park,and among attractions are live Edo festival parades.Universal Studios JapanLocated in Osaka,this park features Hollywood films.One of the two largest theme parks in Japan,along with Tokyo Disney Resort,it is the third theme park operated by Universal Studios and the first outside the United States.At first,the park was to have been named"Universal Studios Osaka,"but this name was not used because its abbreviation (缩写)USO would have been pronounced like the Japanese word uso,which means"lie."The park offers attractions on the theme of motion pictures,with rides such as Sesame Street,Shrek,E.T.,Terminator,Spiderman,etc.Tokyo Disney ResortOpened in the city of Urayasu,Chiba prefecture in 1983 as the first Disneyland outside the United States,Tokyo Disneyland lies on 600,000 square meters of reclaimed land(填海造陆).In 2001,Tokyo DisneySea was opened next to Tokyo Disneyland,with the seas as its theme.This park,Tokyo Disneyland,and neighboring hotels and shopping centers together make up the Tokyo Disney Resort,which brings in more than 25 million visitors every year.Tokyo Disney Resort lies close to Tokyo and other major cities with huge populations,and has easy access to the New Tokyo International Airport in the city of Narita Chiba prefecture.Apart from this,its great success also lies in the fact that new attractionshave been opened one after another,thus winning the support of many repeat visitors.21.In which park can you enjoy the live performance?AA.Nikko Edo VillageB.Universal Studios JapanC.Tokyo DisneySeaD.Tokyo Disney Resort22.Which of the following is not included about Universal Studios Japan?D A.Its locationB.Its attractionsC.Its nameD.Its history23.What can we know about Tokyo Disney Resort?CA.It is the first Disneyland in the worldB.It is made up of two partsC.It is becoming more popularD.It is not easy to get to.【解答】21.A.细节题.由Nikko Edo Village中的Nikko Edo Village is a theme park opened in Tochigi prefecture (县)in 1986that offers an amazing experience of Edo ﹣period culture and lifestyle,可知在这里有关于文化好生活方式的体验,即真实的表现,故选A.22.D.推理判断题.由Universal Studios Japan中的第一句Located in Osaka,this park features Hollywood films,可知此句讲的是位置,At first,the park was to have been named"Universal Studios Osaka,"but this name was not used because its abbreviation (缩写)USO would have been pronounced like the Japanese word uso,which means"lie,讲的是名字的由来和寓意,The park offers attractions on the theme of motion pictures一句讲的是名胜景点,未提及历史,故选D.23.C.推理判断题.由Tokyo Disney Resort中的Apart from this,its great successalso lies in the fact that new attractions have been opened one after another,thus winning the support of many repeat visitors,可知此处不断开发着新的景点,吸引着许多游客,可推知它更有名了,故选C.12.(8分)Mom and businessman Jaimee Newberry founded"Picture This"﹣a new company that allows kids to turn their drawings into dresses.The process is simple:Parents choose a dress size and print out the coloring book﹣style models available on the"Picture This"website.Once their kids have colored and decorated the models,the grown﹣ups can upload photos of the completed designs on the website and place their orders.The finished dresses arrive within a few weeks."Picture This"was inspired by a dress Newberry made for her daughter,Zia,inspired by her artwork.In a Medium post detailing he history of"Picture This",Newberry wrote that Zia loved the dress and told people,"I'm wearing my imagination!""Due to the positive response and requests from Zia's friends and classmates,Ken,Igi,Stephen and I chatted about how to turn this idea into something where kids everywhere could have fun with hands﹣on drawing and coloring,and then see their imaginative artwork come to life in wearable fashion form,"Newberry explained.In addition to kid﹣sized dresses,"Picture This"also allows kids to design dresses for their dolls.And although the service currently only offers dresses,they have plans to expand the clothing choices.For now,Newberry invites families to try out the service and post photos of their dresses on social media.Based on he various kinds of kid art in the world,it's clear these dresses will certainly be unique.24.What chances does"Picture This"give to kids?BA.To learn the latest fashionB.To design their own clothesC.To take photos of themselvesD.To discuss ideas with top designers25.How did Zia friends react to the dress her mother made for her?A A.They spoke highly of itB.They requested Zia to sell itC.They showed no interest in itD.They couldn't stand it.26.What do we know about"Picture This"?BA.It has branched out into grown﹣ups'wearB.It lets its customers'imagination run wildC.It was first created by Newberry's daughterD.Most of its models are designed by Newberry.27.What's the author's attitude towards the future of"Picture This"?C A.Worried B.Uncertain C.Hopeful D.Doubtful.【解答】24.B 细节理解题.根据句子"Picture This"﹣a new company that allows kids to turn their drawings into dresses.这是一家新公司,允许孩子们设计自己的衣服.所以答案选B.25.A 推理判断题.根据句子Due to the positive response and requests from Zia's friends and classmates由于来自于齐亚的朋友和同学的积极的反应,可以推断出对他的衣服评价很高,所以答案选A.26.B 推理判断题.根据句子where kids everywhere could have fun with hands﹣on drawing and coloring,and then see their imaginative artwork come to life in wearable fashion form,那里的孩子们可以用动手画画和上色,然后看到他们富有想象力的艺术品以可穿戴的方式出现,可见这家公司对于顾客的想象力是自由发展,所以答案选B.27.C 推理判断题.根据句子Based on he various kinds of kid art in the world,it's clear these dresses will certainly be unique.根据他在世界各地各种各样的儿童艺术,很明显这些服装肯定是独一无二的.可以推断出"Picture This"的将来时充满希望的符合句意,其他的选项都不符合.所以答案选C.13.(8分)At 23,I was fresh out of graduate school and working in a nursing home,trying to decide my next path in life.My job involved wheeling residents(居民)to the community hall for activities.Elizabeth would wave from her darkened room but refuse to join the gatherings.Nearly blind,and requiring oxygen,she never left her bedside.I soon learned,though,that she loved books,and every day after work I would read to her.In dim light we made our way through"King Lear,""Henry IV,""Jane Eyre,"the poems of Rupert Brooke.Two golden hours might pass before I'd pack up to return to my apartment.Before I could leave she'd press my hand,saying,"Child﹣my literary child.You bring me such joy."Elizabeth's husband had died ten years earlier,and their only child,a daughter,was estranged(疏远)for what heartbreaking reason I never knew.One day an old friend of hers visited and brought her some soup.Smiling broadly,Elizabeth squeezed my arm."Tomorrow,child,we shall feast."The next evening I found Elizabeth's bed empty."I'm sorry,"the nurse whispered.She handed me a box and nodded."She left everything to you."At home,I unpacked it,finding two white sweaters,the dozen leather﹣bound books and,at the bottom,the can of soup.That summer I decided my path.I returned to school to study literature(文学).And for 26years the soup has stayed in my kitchen.It's remained unopened,but the memories are preserved.28.Why did Elizabeth refuse to join the gatherings?CA.She had many books to read.B.She was not a very social person.C.She was limited in her movement.D.She had no interest in those activities.29.What do we know about Elizabeth?DA.She loved writing poems.B.She often visited her friends.。
2016-2017学年山东省泰安市高一下学期期末数学试卷(答案+解析)
山东省泰安市2016-2017学年高一(下)期末数学试卷一、选择题(共12小题,每小题5分,满分60分)1.(5分)sin15°cos15°的值是()A.B.C.D.2.(5分)为了检查某超市货架上的奶粉是否含有三聚氰胺,要从编号依次为1到50的袋装奶粉中抽取5袋进行检验,用每部分选取的号码间隔一样的系统抽样方法确定所选取的5袋奶粉的编号可能是()A.5,10,15,20,25 B.2,4,8,16,32C.1,2,3,4,5 D.7,17,27,37,473.(5分)某单位在1~4 月份用电量(单位:千度)的数据如表:已知用电量y与月份x之间有较好的线性相关关系,其回归方程 5.25,由此可预测5月份用电量(单位:千度)约为()A.1.9 B.1.8 C.1.75 D.1.74.(5分)已知向量||=1,||=,,的夹角为45°,若=,,则在方向上的投影为()A.1 B.﹣1 C.D.﹣5.(5分)已知圆x2+y2﹣2x+my=0上任意一点M关于直线x+y=0的对称点N也在圆上,则m的值为()A.﹣1 B.1 C.﹣2 D.26.(5分)已知一组数据x1,x2,x3,x4,x5的平均数是2,方差是,那么另一组数据2x1﹣1,2x2﹣1,2x3﹣1,2x4﹣1,2x5﹣1的平均数,方差分别是()A.3,B.3,C.4,D.4,7.(5分)已知一扇形的周长为20cm,当这个扇形的面积最大时,半径R的值为()A.4 cm B.5cm C.6cm D.7cm8.(5分)执行如图所示的程序框图,若输入A的值为2,则输出的i值为()A.3 B.4 C.5 D.69.(5分)已知α为锐角,且5α的终边上有一点P(sin(﹣50°),cos130°),则α的值为()A.8°B.44°C.40°D.80°10.(5分)已知角α,β均为锐角,且cosα=,sinβ=,则α﹣β的值为()A.B.C.D.11.(5分)四边形ABCD中,AB=BC,AD⊥DC,AC=2,∠ACD=θ,若,则cos2θ等于()A.B.C.D.12.(5分)若函数f(x)=a sin x+b cos x,(ab≠0)的图象向左平移个单位后得到的图象对应的函数是奇函数,则直线ax﹣by+c=0的斜率为()A.B.C.﹣D.﹣二、填空题(共4小题,每小题5分,满分20分)13.(5分)当a为任意实数时,直线(a﹣1)x﹣y+a+1=0恒过定点C,则以C为圆心,为半径的圆的方程是.14.(5分)若sin(x+)=,则sin(﹣x)+sin2(﹣x)+cos(2x+)=.15.(5分)已知△ABC中,AB=AC=4,BC=4,已知蚂蚁在△ABC的内部爬行,若不考虑蚂蚁的大小,则某时刻该蚂蚁距离△ABC的三个顶点距离均超过1的概率为.16.(5分)关于函数f(x)=cos(2x﹣)+sin(2x+),有①y=f(x)的最大值为;②y=f(x)的最小正周期是π③y=f(x)在区间[﹣,]上是减函数;④直线x=是函数y=f(x)的一条对称轴方程.其中正确命题的序号是.三、解答题(共6小题,满分70分)17.(10分)已知sinα+cosα=﹣,α为第二象限角.(1)求sinα﹣cosα的值;(2)求的值.18.(12分)某市统计局就某地居民的月收入调查了10000人,并根据所得数据画出样本的频率分布直方图(每个分组包括左端点.不包括右端点.如第一组表示收入在[1000,1500).(1)求居民收入在[3000,3500)的频率;(2)根据频率分布直方图算出样本数据的中位数及样本数据的平均数;(3)为了分析居民的收入与年龄、职业等方面的关系,必须按月收入再从这10000人中按分层抽样方法抽出100人作进一步分析,则月收入在[2500,3000)的这段应抽取多少人?19.(12分)某校男女篮球队各有10名队员,现将这20名队员的身高绘制成茎叶图(单位:cm).男队员身高在180cm以上定义为“高个子”,女队员身高在170cm以上定义为“高个子”,其他队员定义为“非高个子”.按照“高个子”和“非高个子”用分层抽样的方法共抽取5名队员.(1)从这5名队员中随机选出2名队员,求这2名队员中有“高个子”的概率;(2)求这5名队员中,恰好男女“高个子”各1名队员的概率.20.(12分)如图,某市园林局准备绿化一块直径为BC的半圆形空地,△ABC以外的地方种草,△ABC的内接正方形PQRS为一水池,其余的地方种花.若BC=a(a为定值),∠ABC=α,设△ABC的面积为S1,正方形PQRS的面积为S2;(1)用a,α表示S1,S2(2)当α为何值时,取得最大值,并求出此最大值.21.(12分)已知圆O:x2+y2=4,圆O与x轴交于A,B两点,过点B的圆的切线为l,P 是圆上异于A,B的一点,PH垂直于x轴,垂足为H,E是PH的中点,延长AP,AE分别交l于F,C.(1)若点P(1,),求以FB为直径的圆的方程,并判断P是否在圆上;(2)当P在圆上运动时,证明:直线PC恒与圆O相切.22.(12分)设函数f(x)=•,其中=(2sin(+x),cos2x).=(sin(+x),﹣),x∈R,(Ⅰ)求f(x)的解析式;(Ⅱ)求f(x)的周期和单调递增区间;(Ⅲ)若关于x的方程f(x)﹣m=2在x∈[,]上有解,求实数m的取值范围.【参考答案】一、选择题(共12小题,每小题5分,满分60分)1.B【解析】sin15°cos15°=sin30°=,故选B.2.D【解析】从编号依次为1到50的袋装奶粉中抽取5袋进行检验,采用系统抽样间隔应为=10,只有D答案中的编号间隔为10,故选D.3.C【解析】∵=2.5,=3.5,线性回归方程是 5.25,∴3.5=2.5b+5.25,∴b=﹣0.7,∴y=﹣0.7x+5.25,x=5时,y=﹣3.5+5.25=1.75,故选C.4.B【解析】根据数量积的几何意义可知,在方向上的投影为||与向量,夹角的余弦值的乘积,∴在方向上的投影为||•cos,如图:||2=()2=1+2+=5.||=cos=﹣∴则在方向上的投影为﹣1.故选B.5.D【解析】∵圆x2+y2﹣2x+my=0上任意一点M关于直线x+y=0的对称点N也在圆上,∴直线x+y=0经过圆心C(1,﹣),故有1﹣=0,解得m=2,故选D.6.A【解析】∵一组数据x1,x2,x3,x4,x5的平均数是2,方差是,∴另一组数据2x1﹣1,2x2﹣1,2x3﹣1,2x4﹣1,2x5﹣1的平均数为:2×2﹣1=3,方差为:=.故选A.7.B【解析】∵l=20﹣2R,∴S=lR=(20﹣2R)•R=﹣R2+10R=﹣(R﹣5)2+25∴当半径R=5cm时,扇形的面积最大为25cm2.故选B.8.C【解析】A=2,i=1,s=0<A,s=1<A,i=2,s=<A,i=3,s=<A,i=4,s=<A,i=5,s=>A,输出i=5,故选C.9.B【解析】∵α为锐角,∴5α∈(0°,450°);∵5α的终边上有一点P(sin(﹣50°),cos130°),即点P(﹣sin50°,﹣cos50°),故点P在第三象限,即5α的终边在第三象限,再根据tan5α===cot50°=tan40°=tan(180°+40°)=tan220°,∴5α=220°,则α=44°,故选B.10.C【解析】∵角α,β均为锐角,且cosα=,sinβ=,∴sinα==,cosβ==,则sin(α﹣β)=sinαcosβ﹣cosαsinβ=•﹣•=﹣,再根据α﹣β∈(﹣,),可得α﹣β=﹣,故选C.11.D【解析】如图所示,取AC的中点O,连接OD,OB,∵AB=BC,OA=OC,∴OB⊥AC,∴•=0;又∵=,=+,=(+),∴(+)•=•+•=(+)•=(+)•(﹣)=﹣+=①,又AD⊥DC,∴+==4②,由①②解得=,∴||=,∴cosθ==;∴cos2θ=2cos2θ﹣1=2×﹣1=.故选D.12.D【解析】∵函数f(x)=a sin x+b cos x=sin(x+∅),(tanφ=),把函数f(x)的图象向左平移个单位后得到的图象对应的函数是g(x)=sin (x++∅),再由g(x)是奇函数可得=kπ,k∈z.∴tan∅=tan(kπ﹣)=﹣,即=﹣.故直线ax﹣by+c=0的斜率为=﹣,故选D.二、填空题(共4小题,每小题5分,满分20分)13.x2+y2+2x﹣4y=0【解析】直线(a﹣1)x﹣y+a+1=0,即a(x+1)+(﹣x﹣y+1)=0,定点C的坐标是方程组的解,∴定点C的坐标是(﹣1,2),再由为半径可得圆的方程是(x+1)2+(y﹣2)2=5,即x2+y2+2x﹣4y=0,故答案为x2+y2+2x﹣4y=0.14.【解析】因为sin(x+)=,所以sin(﹣x)=sin(π﹣﹣x)=sin(x+)=,sin(﹣x)=sin[﹣(x+)]=cos(x+),则sin2(﹣x)=cos2(x+)=1﹣sin2(x+)=,cos(2x+)=cos2(x+)=1﹣2sin2(x+)=,所以sin(﹣x)+sin2(﹣x)+cos(2x+)==,故答案为.15.1﹣【解析】∵三角形的三边长分别是4,4,4,∴三角形的高AD=2,则△ABC的面积为S=×4×2=4;则该蚂蚁距离三角形的三个顶点的距离均超过1,对应的区域为图中阴影部分,三个小扇形的面积之和为一个整圆的面积的,圆的半径为1,则阴影部分的面积为S1=4﹣π•12=4﹣π,根据几何概型的概率公式得所求概率为P==1﹣.故答案为1﹣.16.②④【解析】由题意得,f(x)=cos(2x﹣)+sin(2x+)=cos2x+sin2x+sin2x+cos2x=sin2x+cos2x=,①、当=1时,y=f(x)取到最大值为2,①不正确;②、由T=得,y=f(x)的最小正周期是π,②正确;③、由得,,所以y=f(x)在区间[﹣,]上不是单调函数,③不正确;④、当x=时,,所以直线x=是函数y=f(x)的一条对称轴方程,④正确,故答案为②④.三、解答题(共6小题,满分70分)17.解:(1)∵sinα+cosα=﹣,∴(sinα+cosα)2=sin2α+2sinαcosα+cos2α=1+2sinαcosα=,∴又(sinα﹣cosα)2=(sinα+cosα)2﹣4sinαcosα=.∵α为第二象限角,∴sinα>0,cosα<0,∴sinα﹣cosα>0.∴sinα﹣cosα=;(2)===.18.解:(1)月收入在[3000,3500)的频率为0.0003×500=0.15;(2)从左数第一组的频率为0.0002×500=0.1;第二组的频率为0.0004×500=0.2;第三组的频率为0.0005×500=0.25;∴中位数位于第三组,设中位数为2000+x,则x×0.0005=0.5﹣0.1﹣0.2=0.2⇒x=400.∴中位数为2400(元)由1250×0.1+1750×0.2+2250×0.25+2750×0.25+3250×0.15+3750×0.05=2400,样本数据的平均数为2400(元);(3)月收入在[2500,3000)的频数为0.25×10000=2500(人),∵抽取的样本容量为100.∴抽取比例为=,∴月收入在[2500,3000)的这段应抽取2500×=25(人).19.解:(1)由题意及茎叶图得:“高个子”共8名队员,“非高个子”共12名队员,共抽取5名队员,故从“高个子”队员中抽取2名队员,记为A,B,从“非高个子”中抽取3名队员,记为a,b,c,从中选出2名队员共有=10种选法,分别为:AB,Aa,Ab,Ac,Ba,Bb,Bc,ab,ac,bc,这2名队员中有“高个子”的选法有7种,分别是:AB,Aa,Ab,Ac,Ba,Bb,Bc,故选取2名队员中有“高个子”的概率是p1=.(2)由茎叶图知“高个子”男队员有4名,记为D,E,F,G,“高个子”女队员有4名,记为d,e,f,g,从中抽取2名队员,共有=28种抽法,分别为:DE,DF,DG,Dd,De,Df,Dg,EF,EG,Ed,Ee,Ef,Eg,FG,Fd,Fe,Ff,Fg,gd,Ge,Gf,Gg,de,df,dg,ef,eg,fg,其中,男女“高个子”各1名队员的抽法有16种,∴这5名队员中,恰好男女“高个子”各1名队员的概率p2=.20.解:(1)在Rt△ABC中,BC=a,∠ABC=α,∴AB=a cosα,AC=a sinα,∴S1==,设正方形PQRS的边长为x,则BP=,AP=x cosα,由BP+AP=,AB=a cosα,又AP+BP=AB,∴x==,∴S2=x2=()2=.(2)==,令sin2α=t,由0<α<,得0<2α<π,∴0<t≤1.∴==,0<t≤1,设f(t)=t+(0<t≤1),任取0<t1<t1≤1,则f(t1)﹣f(t2)=﹣=(t1﹣t2),>0,∴f(t)=t++4在(0,1]上单调递减,∴f(t)≥9,∴0<≤,∴的最大值为,此时α=.21.(1)证明:由P(1,),A(﹣2,0)∴直线AP的方程为.令x=2,得F(2,).(2分)由E(1,),A(﹣2,0),则直线AE的方程为y=(x+2),令x=2,得C(2,).(4分)∴C为线段FB的中点,以FB为直径的圆恰以C为圆心,半径等于.∴圆的方程为,且P在圆上;(2)证明:设P(x0,y0),则E(x0,),则直线AE的方程为在此方程中令x=2,得C(2,)直线PC的斜率为=﹣=﹣若x0=0,则此时PC与y轴垂直,即PC⊥OP;若x0≠0,则此时直线OP的斜率为,∵×(﹣)=﹣1∴PC⊥OP∴直线PC与圆O相切.22.解:(Ⅰ)=(2sin(+x),cos2x).=(sin(+x),﹣),则f(x)=•=2sin2(x+)﹣cos2x=1﹣cos(2x+)﹣cos2x=1+sin2x﹣cos2x=1+2sin(2x﹣);(Ⅱ)f(x)的周期为T==π,由2kπ﹣≤2x﹣≤2kπ+,k∈Z,可得kπ﹣≤x≤kπ+,可得f(x)的单调增区间为[kπ﹣,kπ+],k∈Z;(Ⅲ)由x∈[,],可得2x﹣∈[,],sin(2x﹣)∈[,1],则f(x)的值域为[2,3],由m+2∈[2,3],可得m∈[0,1].。
优质:山东省泰安市2016-2017学年高一下学期期末考试数学试题(解析版)
1.A【解析】,故选A.2.D【解析】从编号依次为1到50的袋装奶粉中抽取5袋进行检验,采用系统抽样间隔应为10,只有D 答案中的编号间隔为10,故选D.点睛:求解回归方程问题的三个易误点:(1)易混淆相关关系与函数关系,两者的区别是函数关系是一种确定的关系,而相关关系是一种非确定的关系,函数关系是一种因果关系,而相关关系不一定是因果关系,也可能是伴随关系.(2)回归分析中易误认为样本数据必在回归直线上,实质上回归直线必过(,)点,可能所有的样本数据点都不在直线上.(3)利用回归方程分析问题时,所得的数据易误认为准确值,而实质上是预测值(期望值).4.B【解析】设,又,∴+,∵的夹角为,∴=,联立,解得:或当时,,,∴在方向上的投影为=;当时,,,∴在方向上的投影为=,综上所述:在方向上的投影为-1.故选:B5.D【解析】∵圆x2+y2−2x+my=0上任意一点M关于直线x+y=0的对称点N也在圆上,∴直线x+y=0经过圆心,故有,解得m=2,本题选择D选项.8.C【解析】模拟执行程序,可得A=2,S=0,n=1不满足条件S>2,执行循环体,S=1,n=2不满足条件S>2,执行循环体,S=32,n=3不满足条件S>2,执行循环体,S=116,n=4不满足条件S>2,执行循环体,S=2512,n=5满足条件S>2,退出循环,输出n的值为5.故选:C点睛:算法与流程图的考查,侧重于对流程图循环结构的考查.先明晰算法及流程图的相关概念,包括顺序结构、条件结构、循环结构,其次要重视循环起点条件、循环次数、循环终止条件,更要通过循环规律,明确流程图研究的数学问题,是求和还是求项.9.B【解析】点P化简为P(cos220∘,sin220∘),因为0∘<α<90∘,所以5α=220∘,所以α=44∘.故选B.10.C【解析】∵角α,β均为锐角,且cosα=,sinβ=,∴sinα=,cosβ=,则sin(α−β)=sinαcosβ−cosαsinβ=−=再根据α−β∈(−,),可得α−β=−,故选:C.11.D【解析】如图所示,取AC的中点O,连接OD,OB,∵AB=BC,OA=OC,∴OB⊥AC,∴=0;又AD⊥DC,∴+==4②,由①②解得=,∴||=,∴cosθ==;∴cos2θ=2cos2θ﹣1=2×﹣1=.故选:D.点睛:利用平面向量的线性表示与数量积运算定义,求出模长||,从而得出cosθ,再利用二倍角公式计算cos2θ的值即可.12.D【解析】函数可化为,其向左平移个单位后得到的图象对应的函数是奇函数,所以,即,所以直线的斜率为=-,故选D.点评:小综合题,三角函数的辅助角公式虽然出现在练习题中,但高考考查的频率却挺高,要注意掌握好.13.【解析】直线(a−1)x−y+a+1=0,即a(x+1)+(−x−y+1)=0,定点C的坐标是方程组的解,∴定点C的坐标是(−1,2),又圆的半径为,所以所求圆的方程是(x+1)2+(y−2)2=5,故答案为:.点睛:三角函数式的化简要遵循“三看”原则:一看角,这是重要一环,通过看角之间的差别与联系,把角进行合理的拆分,从而正确使用公式;二看函数名称,看函数名称之间的差异,从而确定使用的公式,常见的有切化弦;三看结构特征,分析结构特征,可以帮助我们找到变形的方向,如遇到分式要通分等.15.【解析】∵中,,∴的面积蚂蚁距离的三个顶点距离均不超过1的部分的面积为所以某时刻蚂蚁距离的三个顶点距离均超过1的概率为故答案为:16.②④【解析】由题意得,f(x)=cos(2x−)+sin(2x+)=cos2x+sin2x+sin2x+cos2x=sin2x+cos2x=2sin(2x+)①、当sin(2x+)=1时, y=f(x)取到最大值为2,①不正确;②、由T==π得,y=f(x)的最小正周期是π,②正确;③、由x∈[] 得,2x+∈[0,],所以y=f(x)在区间[]上不是单调函数,③不正确;④、当x=时,2x+=,所以直线x=是函数y=f(x)的一条对称轴方程,④正确,故答案为:②④.18.【解析】试题分析:(1)根据频率=小矩形的高×组距来求;(2)根据中位数的左右两边的矩形的面积和相等,所以只需求出从左开始面积和等于0.5的底边横坐标的值即可,运用取中间数乘频率,再求之和,计算可得平均数;(3)求出月收入在[2500,3000)的人数,用分层抽样的抽取比例乘以人数,可得答案.试题解析:(1)月收入在的频率为;(2)从左数第一组的频率为;第二组的频率为;第三组的频率为;∴中位数在第三组,设中位数为则得∴中位数为2400(元)由样本的平均数为2400(元)(3)月收入在的频数为(人),∵抽取的样本容量为100,∴抽取的比例为,∴月收入在的这段应抽取为(人)试题解析:(1)由题意及茎叶图可得:“高个子”共8名队员,“非高个子”共12名队员,区抽取5名队员,所以从“高个子”中抽取2名队员,“非高个子”抽取3名队员.记这5名队员中“高个子”为,“非高个子”队员为,选出2名队员有:,共10种选取方法,有“高个子”的选取方法有7种,所以选取2名队员中有“高个子”的概率是(2)记“高个子”男队员分别为,“高个子”女队员分别为,从中抽取2名队员有:共28种抽法,其中男女“高个子”各1名队员的抽法有16种,所以男女“高个子”各1名队员的概率点睛:古典概型中基本事件数的探求方法(1)列举法.(2)树状图法:适合于较为复杂的问题中的基本事件的探求.对于基本事件有“有序”与“无序”区别的题目,常采用树状图法.(3)列表法:适用于多元素基本事件的求解问题,通过列表把复杂的题目简单化、抽象的题目具体化.(4)排列组合法:适用于限制条件较多且元素数目较多的题目.20.【解析】试题分析:(1)在Rt△ABC中,BC=a,∠ABC=α,由AB=acosα,AC=asinα,能求出S1;设正方形PQRS的边长为x,则BP=,AP=xcosα,由BP+AP=,AB=acosα,AP+BP=AB,能求出S2.(2)=,令sin2α=t,推导出=,0<t≤1,设f(t)=(0<t≤1),推导出f(t)=在(0,1]上单调递减,由此能求出的最大值及相应的α.试题解析:(1)在中,,所以设正方形的边长为,则由又所以21.【解析】试题分析:(1)已知点、的坐标,可求出直线的方程,可求出点的坐标,由圆的方程可知点的坐标,可求出以为直径的圆的方程,将点的坐标代入圆的方程,得在圆上;(2)要证明结论,需证明,可先设点坐标,可求点坐标,进而可求点坐标,得与斜率,得得结论.试题解析:(1)由,∴直线的方程为,令,得,由,,则直线的方程为,令,得,∴为线段的中点,以为直径的圆恰以为圆心,半径等于,所以,所求圆的方程为,且在圆上,【易错点晴】点为定点则为定点,容易求出圆的方程,将点的坐标代入圆的方程来检验点是否在圆上;证明线圆相切常用的方法一是可以圆心与切点的连线与切线垂直一是可以利用圆到直线的距离等于半径,基于本题的复杂性,显然选用第二种方法是比较好的.只要得出即可,本题难在计算,如何用代数式求比值;本题综合性强,强调了学生的逻辑能力和运算能力.属于难题.22.【解析】试题分析:(Ⅰ)运用向量的数量积的坐标表示,结合二倍角公式和两角差的正弦公式,化简可得f(x)的解析式;(Ⅱ)运用正弦函数的周期公式和单调增区间,解不等式即可得到所求;(Ⅲ)由正弦函数的图象和性质,可得f(x)在上的值域,即为m+2的范围,解不等式即可得到所求.试题解析:(1)(2)周期由解得:的单调递增区间为点睛:已知函数有零点求参数取值范围常用的方法和思路(1)直接法:直接根据题设条件构建关于参数的不等式,再通过解不等式确定参数范围;(2)分离参数法:先将参数分离,转化成求函数值域问题加以解决;(3)数形结合法:先对解析式变形,在同一平面直角坐标系中,画出函数的图象,然后数形结合求解.。
山东省泰安市2016-2017学年高一(下)期末物理试卷(解析版)
2016-2017学年山东省泰安市高一(下)期末物理试卷一、选择题(共12小题,每小题4分,满分48分)1. 一个做匀速直线运动的物体,突然受到一个与运动方向垂直的恒力作用时,物体的运动轨迹是()A. 一定做直线运动B. 一定做匀变速运动C. 可能做直线运动,也可能做曲线运动D. 可能做匀速圆周运动【答案】B【解析】试题分析:一个做匀速直线运动的物体,突然受到一个与运动方向垂直的恒力作用时,物体的运动轨迹是曲线,由于力是恒力,故加速度恒定,故物体做匀变速曲线运动,选项B正确,AC错误;匀速圆周运动的物体所受的合力大小不变,方向不断变化,故此物体受恒力作用时不可能做匀速圆周运动,选项D 错误;故选B.考点:曲线运动【名师点睛】此题考查了曲线运动的条件,当物体受到与速度不共线的力作用时,物体做曲线运动;当力是恒力时,物体做匀变速曲线运动;记住两种特殊的曲线运动:平抛运动和匀速圆周运动的运动特点和受力特点.2. 如图所示,一小船位于100m宽的河的正中央A点处,从这里向下游处有一危险区,当时水流速度为6m/s,为了使小船避开危险区直线到达对岸,那么小船航行的最小速度(静水中)为()A. 2m/sB. m/sC. 4m/sD. 3m/s【答案】D【解析】为了使小船避开危险区直线到达对岸,则最大位移为:,因此设小船能安全到达河岸的合速度与水流速度的夹角为θ,即有,解得:θ=30°,流水速度已知,则可得小船在静水中最小速度为,故ABC错误,D正确。
3. 如图所示,绳子一端拴着物体M,另一端绕过滑轮系在水平向左运动的小车的P点,图示时刻滑轮左侧的绳子与水平方向成角θ,则()A. 若小车匀速运动,则M加速上升B. 若小车匀速运动,则M减速上升C. 若小车做加速度运动,则M匀速上升D. 若小车做加速度运动,则M减速上升【答案】A【解析】设绳子与水平方向的夹角为θ,绳子的瞬时速度大小为v A.将小车的运动分解为沿绳子方向的运动,以及垂直绳子方向的运动,则可得:v A=vcosθ,若小车匀速向左,即v不变,而θ减小,则cosθ增大,故v A增大,即物体向上做加速运动,故A正确,B错误;若小车做加速运动时,由v A=vcosθ可知,v增大,θ减小,则cosθ增大,故v A 增大,物体M一定加速上升,故CD错误。
山东省泰安市高一下期末考试数学试卷及答案解析
第 1 页 共 21 页2020-2021学年山东省泰安市高一下数学期末试卷一.单项选择题(共8小题,每小题5分,共40分) 1.复数z =2+i1−2i,则在复平面内,z 对应的点的坐标是( ) A .(1,0)B .(0,1)C .(−53,−43)D .(−43,−53)2.已知非零向量a →,b →,若|a →|=√2|b →|,且a →⊥(a →−2b →),则a →与b →的夹角为( ) A .π6B .π4C .π3D .3π43.设l 1,l 2是两条不同的直线,α1,α2是两个不同的平面,下列选项正确的是( ) A .若l 1⊥α1,l 2⊂α2,且l 1⊥l 2,则α1⊥α2B .若l 1⊂α1,l 2⊂α2,且l 1∥α2,l 2∥α1,则α1∥α2C .若l 1⊥α1,l 2⊥α2,且α1⊥α2,则l 1⊥l 2D .若l 1∥α1,l 2∥α2,且α1∥α2,则l 1∥l 24.记一个三位数的各位数字的和为M ,则从M 不超过5的三位奇数中任取一个,M 为偶数的概率为( ) A .513B .512C .413D .135.已知圆锥的一条母线的中点与圆锥底面圆的圆心间的距离为2,母线与底面所成的角为60°,则该圆锥的体积为( ) A .8√3π3B .8√3πC .16√3π3D .16√3π6.紫砂壶是中国特有的手工制造陶土工艺品,其制作始于明朝正德年间.紫砂壶的壶型众多,经典的有西施壶、掇球壶、石瓢壶、潘壶等.其中,石瓢壶的壶体可以近似看成一个圆台(即圆锥用平行于底面的平面截去一个锥体得到的).如图给出了一个石瓢壶的相关数据(单位:cm ),那么该壶的容量约为( )A .100cm 3B .200cm 3C .300cm 3D .400cm 37.在天气预报中,有“降水概率预报”.例如,预报“明天降水概率为85%”,这是指( )。
山东省泰安市高一下学期期末数学试卷
山东省泰安市高一下学期期末数学试卷姓名:________ 班级:________ 成绩:________一、选择题 (共12题;共24分)1. (2分) (2016高一上·荆门期末) cos 的值是()A . ﹣B . ﹣C .D .2. (2分) (2019高二上·水富期中) 为了解某社区居民的家庭年收入所年支出的关系,随机调查了该社区5户家庭,得到如下统计数据表:收入(万元)8.28.610.011.311.9支出(万元) 6.27.58.08.59.8根据上表可得回归直线方程,其中,据此估计,该社区一户收入为16万元家庭年支出为()A . 11.80万元B . 12.56万元C . 11.04万元D . 12.26万元3. (2分) (2017高一下·红桥期末) 把黑、红、白各1张纸牌分给甲、乙、丙三人,则事件“甲分得红牌”与“乙分得红牌”是()A . 对立事件B . 互斥但不对立事件C . 不可能事件D . 必然事件4. (2分)圆与圆的位置关系是()A . 外离B . 外切C . 相交D . 内含5. (2分)(2017·成安模拟) 执行如图所示的程序框图,输出的结果是()A . 13B . 11C . 9D . 76. (2分)(2017·上饶模拟) 已知,则的值等于()A .B .C .D .7. (2分) (2017高二上·大连期末) 如图,设D是图中边长分别为1和2的矩形区域,E是D内位于函数y= (x>0)图象下方的区域(阴影部分),从D内随机取一个点M,则点M取自E内的概率为()A .B .C .D .8. (2分)函数y=的图象如图,则()A . k=,ω=,φ=B . k=,ω=,φ=C . k=﹣,ω=2,φ=D . k=﹣2,ω=2,φ=9. (2分)圆(x﹣1)2+(y+1)2=2的周长是()A . πB . 2πC . 2 πD . 4π10. (2分)在△OAB中, =4 , =2 ,AD,BC的交点为M,过M作动直线l分别交线段AC,BD于E,F两点,若=λ ,=μ ,(λ,μ>0),则λ+μ的最小值为()A .B .C .D .11. (2分) (2017高一下·穆棱期末) 已知点是圆内一点,直线是以为中点的弦所在直线,直线的方程为,则()A . ,且与圆相交B . ,且与圆相离C . ,且与圆相交D . ,且与圆相离12. (2分)如图,平行四边形ABCD中,=(2,0),=(﹣3,2),则•=()A . -6B . 4C . 9D . 13二、填空题 (共4题;共5分)13. (2分) (2019高一下·朝阳期末) 某学校甲、乙两个班各15名学生参加环保知识竞赛,成绩的茎叶图如下:则这30名学生的最高成绩是________;由图中数据可得________班的平均成绩较高.14. (1分) (2017高二上·江苏月考) 已知圆锥底面半径为,母线长是底面半径的3倍,底面圆周上有一点,则一个小虫自点出发在侧面上绕一周回到点的最短路程为________.15. (1分)sin10°sin50°sin70°=________.16. (1分)(2017·渝中模拟) 设直线y=kx+1与圆x2+y2+2x﹣my=0相交于A,B两点,若点A,B关于直线l:x+y=0对称,则|AB|=________.三、解答题 (共6题;共60分)17. (15分) (2016高二上.临川期中) 为了估计某校的一次数学考试情况,现从该校参加考试的600名学生中随机抽出60名学生,其成绩(百分制)均在[40,100)上,将这些成绩分成六段[40,50),[50,60) (90)100),后得到如图所示部分频率分布直方图.(1)求抽出的60名学生中分数在[70,80)内的人数;(2)若规定成绩不小于85分为优秀,则根据频率分布直方图,估计该校优秀人数.(3)根据频率分布直方图算出样本数据的中位数.18. (10分)已知 = .(1)求tan(﹣α)的值;(2)求3cosα•sin(α+π)+2cos2(α+ )的值.19. (5分)如图,函数f(x)=Asin(ωx+φ),x∈R,(其中A>0,ω>0,0≤φ≤)的部分图象,其图象与y轴交于点(0,)(Ⅰ)求函数的解析式;(Ⅱ)若,求-的值.20. (10分) (2016高三上·黄冈期中) 已知向量 =(sinx,), =(cosx,﹣1).(1)当∥ 时,求tan(x﹣)的值;(2)设函数f(x)=2( + )• ,当x∈[0, ]时,求f(x)的值域.21. (10分)某公司从大学招收毕业生,经过综合测试,录用了14名男生和6名女生,这20名毕业生的测试成绩如茎叶图所示(单位:分).公司规定:成绩在180分以上者到甲部门工作,180分以下者到乙部门工作,另外只有成绩高于180分的男生才能担任助理工作.(1)分别求甲、乙两部门毕业生测试成绩的中位数和平均数(2)如果用分层抽样的方法从甲部门人选和乙部门人选中选取8人,再从这8人中选3人,那么至少有一人是甲部门人选的概率是多少?22. (10分)(2018高二上·江苏月考) 已知圆,直线.(1)证明:对任意实数,直线恒过定点且与圆交于两个不同点;(2)求直线被圆截得的弦长最小时的方程.参考答案一、选择题 (共12题;共24分)1-1、2-1、3-1、4-1、5-1、6-1、7-1、8-1、9-1、10-1、11-1、12-1、二、填空题 (共4题;共5分)13-1、14-1、15-1、16-1、三、解答题 (共6题;共60分) 17-1、17-2、17-3、18-1、18-2、19-1、20-1、20-2、21-1、21-2、22-1、22-2、第11 页共11 页。
山东省泰安市2016-2017学年高一下学期期末考试英语试题
山东省泰安市2016-2017学年高一下学期期末考试英语试题第一部分听力(共两节,满分30分)第一节(共5小题;每小题1.5分,满分7.5分)听下面5段对话。
每段对话后有一个小题,从题中所给的A、B、C三个选项中选出最佳选项,并标在试卷的相应位置。
听完每段对话后,你都有10秒钟的时间来回答有关小题和阅读下一小题。
每段对话仅读一遍。
1. What are the speakers talking about?A. The term paperB. Touring resourcesC. A trip to China2. What does the woman mean?A. She feels very hungryB. The man ate all the foodC. The refrigerator needs cleaning.3. Where does the conversation take place?A. In a hotelB. In a hospitalC. At Harry’s home4. What does the woman advise the man to do?A. Go to work by carB. Have a quick breakfastC. Do morning exercise5. At what time did the woman first wake up the man?A. 7:20B. 7:30C. 7:40第二节(共15小题;每小题1.5分,满分22.5分)听下面5段对话或独白。
每段对话或独白后有几个小题,从题中所给的A、B、C三个选项中选出最佳选项,并标在试卷的相应位置。
听每段对话或独白前,你将有时间阅读各个小题,每小题5秒钟;听完后,各小题将给出5秒钟的作答时间。
每段对话或独白读两遍。
6. Why does the man refuse the woman at first?A. He will have a visitorB. He will travel to New YorkC. He will meet his sister in Los Angeles.7. When will the speakers have a meal together?A. Next WednesdayB. Next SaturdayC. This Saturday听下面一段对话,回答第8和第9两个小题。
2017-2018年山东省泰安市高一(下)期末数学试卷(解析版)
2017-2018学年山东省泰安市高一(下)期末数学试卷一、选择题:本大题共12个小题,每小题5分,共60分.在每小题给出的四个选项中,只有一项是符合题目要求的.1.(5分)sin(﹣600°)=()A.B.C.﹣D.﹣2.(5分)某单位有职工750人,其中青年职工350人,中年职工250人,老年职工150人,为了解该单位职工的健康情况,用分层抽样的方法从中抽取样本,若样本中的青年职工为7人,则样本容量为()A.35B.25C.15D.73.(5分)下列事件是随机事件的是()(1)连续两次掷一枚硬币,两次都出现正面向上.(2)异性电荷相互吸引(3)在标准大气压下,水在1℃时结冰(4)任意掷一枚骰子朝上的点数是偶数.A.(1)(2)B.(2)(3)C.(3)(4)D.(1)(4)4.(5分)若扇形的周长为4cm,半径为1cm,则其圆心角的大小为()A.2°B.4°C.2D.45.(5分)从1,3,4中任取2个不同的数,则取出的2个数之差的绝对值为2的概率为()A.B.C.D.6.(5分)设某大学的女生体重y(单位:kg)与身高x(单位:cm)具有线性相关关系,根据一组样本数据(x i,y i)(i=1,2,…,n),用最小二乘法建立的回归方程为=0.85x ﹣85.71,则下列结论中不正确的是()A.y与x具有正的线性相关关系B.回归直线过样本点的中心(,)C.若该大学某女生身高增加1cm,则其体重约增加0.85kgD.若该大学某女生身高为170cm,则可断定其体重必为58.79kg7.(5分)设α是第二象限角,P(x,4)为其终边上的一点,且cosα=x,则tanα等于()A.﹣B.﹣C.D.8.(5分)把黑、红、白3张纸牌分给甲、乙、丙三人,每人一张,则事件“甲分得红牌”与“乙分得红牌”是()A.对立事件B.必然事件C.不可能事件D.互斥但不对立事件9.(5分)如图,在△OAB中,P为线段AB上的一点,,且,则()A.B.C.D.10.(5分)函数f(x)=1﹣2sin2(x﹣)是()A.最小正周期为π的偶函数B.最小正周期为π的奇函数C.最小正周期为的偶函数D.最小正周期为的奇函数11.(5分)在△ABC中,有命题①﹣=;②++=;③若(+)•(+)=,则△ABC为等腰三角形;④若•>0,则△ABC为锐角三角形.上述命题正确的有()个.A.1个B.2个C.3个D.4个12.(5分)已知A,B,C,D,E是函数y=sin(ωx+φ)(ω>0,0<φ<)一个周期内的图象上的五个点,如图所示,A(,0),B为y轴上的点,C为图象上的最低点,E为该函数图象的一个对称中心,B与D关于点E对称,在x轴上的投影为,则ω,φ的值为()A.ω=2,φ=B.ω=2,φ=C.ω=,φ=D.ω=,φ=二、填空题:本大题共4小题,每小题5分,共20分.13.(5分)若,则的值是.14.(5分)△ABC的内角A,B,C所对的边分别为a,b,c,,,,则A=.15.(5分)已知向量,满足(+2)•(﹣)=﹣6且||=1,||=2,则与的夹角为.16.(5分)甲、乙两同学的6次考试成绩分别为:根据以上数据,分别从平均数和方差两个方面写出两个统计结论:①;②.三、解答题:共70分.解答应写出文字说明、证明过程或演算步骤.17.(10分)在平面直角坐标系xoy中,已知点A(1,4),B(﹣2,3),C(2,﹣1).(I)求•及+;(Ⅱ)设实数t满足(﹣t)⊥,求t的值.18.(12分)有两个袋子,其中甲袋中装有编号分别为1、2、3、4的4个完全相同的球,乙袋中装有编号分别为2、4、6的3个完全相同的球.(1)从甲、乙袋子中各取一个球,求两球编号之和小于6的概率;(2)从甲袋中取2个球,从乙袋中取一个球,求所取出的3个球中含有编号为2的球的概率.19.(12分)已知,.(1)求的值;(2)求的值.20.(12分)体检评价标准指出:健康指数不低于70者为身体状况好,健康指数低于70者为身体状况一般.经体检调查,某学校数学学科30位教师的健康指数(百分制)的数据如下:65,76,80,75,92,84,76,86,87,95,68,82,72,94,71,89,83,77,63,58,85,93,65,72,59,91,63,67,56,64.(1)现将这30位教师的健康指数分为如下5组:[50,60),[60,70),[70,80),[80,90),[90,100),作出这些数据的频率分布表和频率分布直方图;(2)根据频率分布直方图估算该学科教师健康指数的平均数.21.(12分)如图,甲船以每小时海里的速度向正北方航行,乙船按固定方向匀速直线航行,当甲船位于A1处时,乙船位于甲船的北偏西105°方向的B1处,此时两船相距20海里,当甲船航行20分钟到达A2处时,乙船航行到甲船的北偏西120°方向的B2处,此时两船相距海里,问乙船每小时航行多少海里?22.(12分)已知函数(ω>0),直线x=x1,x =x2是函数y=f(x)的图象的任意两条对称轴,且|x1﹣x2|的最小值为.(1)求ω的值;(2)求函数f(x)的单调增区间;(3)若,求的值.2017-2018学年山东省泰安市高一(下)期末数学试卷参考答案与试题解析一、选择题:本大题共12个小题,每小题5分,共60分.在每小题给出的四个选项中,只有一项是符合题目要求的.1.(5分)sin(﹣600°)=()A.B.C.﹣D.﹣【解答】解:sin(﹣600°)=﹣sin600°=﹣sin(360°+240°)=﹣sin240°=﹣sin(180°+60°)=sin60°=,故选:B.2.(5分)某单位有职工750人,其中青年职工350人,中年职工250人,老年职工150人,为了解该单位职工的健康情况,用分层抽样的方法从中抽取样本,若样本中的青年职工为7人,则样本容量为()A.35B.25C.15D.7【解答】解:青年职工、中年职工、老年职工三层之比为7:5:3,所以样本容量为=15.故选:C.3.(5分)下列事件是随机事件的是()(1)连续两次掷一枚硬币,两次都出现正面向上.(2)异性电荷相互吸引(3)在标准大气压下,水在1℃时结冰(4)任意掷一枚骰子朝上的点数是偶数.A.(1)(2)B.(2)(3)C.(3)(4)D.(1)(4)【解答】解:(1)连续两次掷一枚硬币,两次都出现正面向上.是随机事件;(2)异性电荷相互吸引,是必然事件;(3)在标准大气压下,水在1℃时结冰,是不可能事件;(4)任意掷一枚骰子朝上的点数是偶数.是随机事件;故是随机事件的是(1),(4),故选:D.4.(5分)若扇形的周长为4cm,半径为1cm,则其圆心角的大小为()A.2°B.4°C.2D.4【解答】解:设扇形的周长为C,弧长为l,圆心角为α,根据题意可知周长C=2+l=4,∴l=2,而l=|α|r=α×1,∴α=2,故选:C.5.(5分)从1,3,4中任取2个不同的数,则取出的2个数之差的绝对值为2的概率为()A.B.C.D.【解答】解:从1,3,4中任取2个不同的数,基本事件总数n=,取出的2个数之差的绝对值为2包含的基本事件有:(1,3),则取出的2个数之差的绝对值为2的概率为p=.故选:C.6.(5分)设某大学的女生体重y(单位:kg)与身高x(单位:cm)具有线性相关关系,根据一组样本数据(x i,y i)(i=1,2,…,n),用最小二乘法建立的回归方程为=0.85x ﹣85.71,则下列结论中不正确的是()A.y与x具有正的线性相关关系B.回归直线过样本点的中心(,)C.若该大学某女生身高增加1cm,则其体重约增加0.85kgD.若该大学某女生身高为170cm,则可断定其体重必为58.79kg【解答】解:对于A,0.85>0,所以y与x具有正的线性相关关系,故正确;对于B,回归直线过样本点的中心(,),故正确;对于C,∵回归方程为=0.85x﹣85.71,∴该大学某女生身高增加1cm,则其体重约增加0.85kg,故正确;对于D,x=170cm时,=0.85×170﹣85.71=58.79,但这是预测值,不可断定其体重为58.79kg,故不正确故选:D.7.(5分)设α是第二象限角,P(x,4)为其终边上的一点,且cosα=x,则tanα等于()A.﹣B.﹣C.D.【解答】解:∵cosα==x,∴=5,解得x=±3,又α是第二象限角,∴x=﹣3,∴tanα==﹣,故选:A.8.(5分)把黑、红、白3张纸牌分给甲、乙、丙三人,每人一张,则事件“甲分得红牌”与“乙分得红牌”是()A.对立事件B.必然事件C.不可能事件D.互斥但不对立事件【解答】解:黑、红、白3张纸牌分给甲、乙、丙三人,每人一张,事件“甲分得红牌”与“乙分得红牌”不可能同时发生,但事件“甲分得红牌”不发生时,事件“乙分得红牌”有可能发生,有可能不发生,∴事件“甲分得红牌”与“乙分得红牌”是互斥但不对立事件.故选:D.9.(5分)如图,在△OAB中,P为线段AB上的一点,,且,则()A.B.C.D.【解答】解:由题意,∵,∴,即,∴,即故选:A.10.(5分)函数f(x)=1﹣2sin2(x﹣)是()A.最小正周期为π的偶函数B.最小正周期为π的奇函数C.最小正周期为的偶函数D.最小正周期为的奇函数【解答】解:函数=所以函数是最小正周期为π的奇函数.故选:B.11.(5分)在△ABC中,有命题①﹣=;②++=;③若(+)•(+)=,则△ABC为等腰三角形;④若•>0,则△ABC为锐角三角形.上述命题正确的有()个.A.1个B.2个C.3个D.4个【解答】解:①.②正确.③向量的乘积是个数值,而不是向量,所以命题的条件错了.④,说明角A为锐角,并不能说明是锐角三角形.12.(5分)已知A,B,C,D,E是函数y=sin(ωx+φ)(ω>0,0<φ<)一个周期内的图象上的五个点,如图所示,A(,0),B为y轴上的点,C为图象上的最低点,E为该函数图象的一个对称中心,B与D关于点E对称,在x轴上的投影为,则ω,φ的值为()A.ω=2,φ=B.ω=2,φ=C.ω=,φ=D.ω=,φ=【解答】解:因为A,B,C,D,E是函数y=sin(ωx+ϕ)(ω>0,0<ϕ<)一个周期内的图象上的五个点,如图所示,A(,0),B为y轴上的点,C为图象上的最低点,E为该函数图象的一个对称中心,B与D关于点E对称,在x轴上的投影为,所以T=4×()=π,所以ω=2,因为A(,0),所以0=sin(﹣+ϕ),0<ϕ<,ϕ=.故选:B.二、填空题:本大题共4小题,每小题5分,共20分.13.(5分)若,则的值是﹣.【解答】解:若,则=cos[π﹣(﹣α)]=﹣cos(﹣α)=﹣,故答案为:﹣.14.(5分)△ABC的内角A,B,C所对的边分别为a,b,c,,,,则A=,或..【解答】解:∵,,,∴由正弦定理可得:sin A===,∵a>b,可得A∈(,π),∴A=,或.故答案为:,或.15.(5分)已知向量,满足(+2)•(﹣)=﹣6且||=1,||=2,则与的夹角为.【解答】解:由已知向量,满足(+2)•(﹣)=﹣6且||=1,||=2,∵,整理原式得=﹣6,解得:=,所以,向量与的夹角为,故答案为:.16.(5分)甲、乙两同学的6次考试成绩分别为:根据以上数据,分别从平均数和方差两个方面写出两个统计结论:①甲的平均数高于乙的平均数,说明甲的水平较高些;②甲的方差高于乙的方差,说明甲的成绩不如乙的成绩稳定.【解答】解:①计算甲的平均数为=×(99+89+97+85+95+99)=94,乙的平均数为=×(89+93+90+89+92+90)=90.5;∴甲的平均数高于乙的平均数,说明甲的水平较高些;②计算甲的方差为=×[(99﹣94)2+(89﹣94)2+(97﹣94)2+(85﹣94)2+(95﹣94)2+(99﹣94)2]=≈27.7;乙的方差为=×[(89﹣90.5)2+(93﹣90.5)2+(90﹣90.5)2+(89﹣90.5)2+(92﹣90.5)2+(90﹣90.5)2]==13.5;∴甲的方差高于乙的方差,说明甲的成绩不如乙的成绩稳定.故答案为:①甲的平均数高于乙的平均数,说明甲的水平较高些;②甲的方差高于乙的方差,说明甲的成绩不如乙的成绩稳定.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.17.(10分)在平面直角坐标系xoy中,已知点A(1,4),B(﹣2,3),C(2,﹣1).(I)求•及+;(Ⅱ)设实数t满足(﹣t)⊥,求t的值.【解答】解:(1)∵A(1,4),B(﹣2,3),C(2,﹣1).∴=(﹣3,﹣1),=(1,﹣5),=(﹣2,﹣6),∴=﹣3×1+(﹣1)×(﹣5)=2,||==2.(2)∵,∴=0,即=0,又=﹣3×2+(﹣1)×(﹣1)=﹣5,=22+(﹣1)2=5,∴﹣5﹣5t=0,∴t=﹣1.18.(12分)有两个袋子,其中甲袋中装有编号分别为1、2、3、4的4个完全相同的球,乙袋中装有编号分别为2、4、6的3个完全相同的球.(1)从甲、乙袋子中各取一个球,求两球编号之和小于6的概率;(2)从甲袋中取2个球,从乙袋中取一个球,求所取出的3个球中含有编号为2的球的概率.【解答】解:(1)将甲袋中编号分别为1,2,3,4的4个分别记为A1,A2,A3,A4,将乙袋中编号分别为2,4,6的三个球分别记为B2,B4,B6,从甲、乙两袋中各取一个小球的基本事件为:(A1,B2),(A1,B4),(A1,B6),(A2,B2),(A2,B4),(A2,B6),(A3,B2),(A3,B4),(A3,B6),(A4,B2),(A4,B4),(A4,B6),共12种,其中两球编号之和小于6的共有6种,∴两球编号之和小于6的概率为:p1=.(2)从甲袋中任取2球,从乙袋中任取一球,所有基本事件个数n==18,其中不含有编号2的基本事件有=6,∴含有编号2的基本事件个数m=18﹣6=12,∴所取出的3个球中含有编号为2的球的概率p==.19.(12分)已知,.(1)求的值;(2)求的值.【解答】解:由,得3tan2α+10tanα+3=0,解得:tanα=﹣3或tanα=.∵,∴tanα=,(1)==;(2)====.20.(12分)体检评价标准指出:健康指数不低于70者为身体状况好,健康指数低于70者为身体状况一般.经体检调查,某学校数学学科30位教师的健康指数(百分制)的数据如下:65,76,80,75,92,84,76,86,87,95,68,82,72,94,71,89,83,77,63,58,85,93,65,72,59,91,63,67,56,64.(1)现将这30位教师的健康指数分为如下5组:[50,60),[60,70),[70,80),[80,90),[90,100),作出这些数据的频率分布表和频率分布直方图;(2)根据频率分布直方图估算该学科教师健康指数的平均数.【解答】解:(1)根据题意,填写频率分布表如下;作出频率分布直方图如图所示;(2)根据频率分布直方图,计算=55×0.1+65×0.23+75×0.23+85×0.27+95×0.17=76.8,即估算该学科教师健康指数的平均数为76.8.21.(12分)如图,甲船以每小时海里的速度向正北方航行,乙船按固定方向匀速直线航行,当甲船位于A1处时,乙船位于甲船的北偏西105°方向的B1处,此时两船相距20海里,当甲船航行20分钟到达A2处时,乙船航行到甲船的北偏西120°方向的B2处,此时两船相距海里,问乙船每小时航行多少海里?【解答】解:由题意可知A1B1=20,A2B2=10,A1A2=30×=10,∠B2A2A1=180°﹣120°=60°,连结A1B2,则△A1A2B2是等边三角形,∴A1B2=10,∠A2A1B2=60°.∴∠B1A1B2=105°﹣60°=45°,在△B1A1B2中,由余弦定理得B1B22=A1B12+A1B22﹣2A1B1•A1B2cos∠B1A1B2=400+200﹣400=200.∴B1B2=10.∴乙船的航行速度是海里/小时.22.(12分)已知函数(ω>0),直线x=x1,x =x2是函数y=f(x)的图象的任意两条对称轴,且|x1﹣x2|的最小值为.(1)求ω的值;(2)求函数f(x)的单调增区间;(3)若,求的值.【解答】解:(1)函数(ω>0),=,=2sin(2ωx+).由于直线x=x1,x=x2是函数y=f(x)的图象的任意两条对称轴,且|x1﹣x2|的最小值为.则:,解得:ω=1.(2)根据(1)得函数的关系式为f(x)=2sin(2x+).令:(k∈Z),解得:(k∈Z),所以函数的单调递增区间为:[](k∈Z).(3)由于,则:,解得:.所以sin()=sin()=sin[﹣2(2)]=﹣cos[2(2α+)],=2,=﹣.。
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2016-2017学年山东省泰安市高一(下)期末数学试卷一、选择题(共12小题,每小题5分,满分60分)1.(5分)sin15°cos15°的值是()A.B.C.D.2.(5分)为了检查某超市货架上的奶粉是否含有三聚氰胺,要从编号依次为1到50的袋装奶粉中抽取5袋进行检验,用每部分选取的号码间隔一样的系统抽样方法确定所选取的5袋奶粉的编号可能是()A.5,10,15,20,25 B.2,4,8,16,32C.1,2,3,4,5 D.7,17,27,37,473.(5分)某单位在1~4 月份用电量(单位:千度)的数据如表:已知用电量y与月份x之间有较好的线性相关关系,其回归方程 5.25,由此可预测5月份用电量(单位:千度)约为()A.1.9 B.1.8 C.1.75 D.1.74.(5分)已知向量||=1,||=,,的夹角为45°,若=,,则在方向上的投影为()A.1 B.﹣1 C.D.﹣5.(5分)已知圆x2+y2﹣2x+my=0上任意一点M关于直线x+y=0的对称点N也在圆上,则m的值为()A.﹣1 B.1 C.﹣2 D.26.(5分)已知一组数据x1,x2,x3,x4,x5的平均数是2,方差是,那么另一组数据2x1﹣1,2x2﹣1,2x3﹣1,2x4﹣1,2x5﹣1的平均数,方差分别是()A.3,B.3,C.4,D.4,7.(5分)已知一扇形的周长为20cm,当这个扇形的面积最大时,半径R的值为()A.4 cm B.5cm C.6cm D.7cm8.(5分)执行如图所示的程序框图,若输入A的值为2,则输出的i值为()A.3 B.4 C.5 D.69.(5分)已知α为锐角,且5α的终边上有一点P(sin(﹣50°),cos130°),则α的值为()A.8°B.44°C.40°D.80°10.(5分)已知角α,β均为锐角,且cosα=,sinβ=,则α﹣β的值为()A.B.C.D.11.(5分)四边形ABCD中,AB=BC,AD⊥DC,AC=2,∠ACD=θ,若,则cos2θ等于()A.B.C.D.12.(5分)若函数f(x)=asinx+bcosx,(ab≠0)的图象向左平移个单位后得到的图象对应的函数是奇函数,则直线ax﹣by+c=0的斜率为()A.B.C.﹣D.﹣二、填空题(共4小题,每小题5分,满分20分)13.(5分)当a为任意实数时,直线(a﹣1)x﹣y+a+1=0恒过定点C,则以C 为圆心,为半径的圆的方程是.14.(5分)若sin(x+)=,则sin(﹣x)+sin2(﹣x)+cos(2x+)=.15.(5分)已知△ABC中,AB=AC=4,BC=4,已知蚂蚁在△ABC的内部爬行,若不考虑蚂蚁的大小,则某时刻该蚂蚁距离△ABC的三个顶点距离均超过1的概率为.16.(5分)关于函数f(x)=cos(2x﹣)+sin(2x+),有①y=f(x)的最大值为;②y=f(x)的最小正周期是π③y=f(x)在区间[﹣,]上是减函数;④直线x=是函数y=f(x)的一条对称轴方程.其中正确命题的序号是.三、解答题(共6小题,满分70分)17.(10分)已知sinα+cosα=﹣,α为第二象限角.(1)求sinα﹣cosα的值;(2)求的值.18.(12分)某市统计局就某地居民的月收入调查了10000人,并根据所得数据画出样本的频率分布直方图(每个分组包括左端点.不包括右端点.如第一组表示收入在[1000,1500)(1)求居民收入在[3000,3500)的频率;(2)根据频率分布直方图算出样本数据的中位数及样本数据的平均数;(3)为了分析居民的收入与年龄、职业等方面的关系,必须按月收入再从这10000人中按分层抽样方法抽出100人作进一步分析,则月收入在[2500,3000)的这段应抽取多少人?19.(12分)某校男女篮球队各有10名队员,现将这20名队员的身高绘制成茎叶图(单位:cm).男队员身高在180cm以上定义为“高个子”,女队员身高在170cm 以上定义为“高个子”,其他队员定义为“非高个子”.按照“高个子”和“非高个子”用分层抽样的方法共抽取5名队员.(1)从这5名队员中随机选出2名队员,求这2名队员中有“高个子”的概率;(2)求这5名队员中,恰好男女“高个子”各1名队员的概率.20.(12分)如图,某市园林局准备绿化一块直径为BC的半圆形空地,△ABC 以外的地方种草,△ABC的内接正方形PQRS为一水池,其余的地方种花.若BC=a (a为定值),∠ABC=α,设△ABC的面积为S1,正方形PQRS的面积为S2;(1)用a,α表示S1,S2(2)当α为何值时,取得最大值,并求出此最大值.21.(12分)已知圆O:x2+y2=4,圆O与x轴交于A,B两点,过点B的圆的切线为l,P是圆上异于A,B的一点,PH垂直于x轴,垂足为H,E是PH的中点,延长AP,AE分别交l于F,C.(1)若点P(1,),求以FB为直径的圆的方程,并判断P是否在圆上;(2)当P在圆上运动时,证明:直线PC恒与圆O相切.22.(12分)设函数f(x)=•,其中=(2sin(+x),cos2x).=(sin(+x),﹣),x∈R,(Ⅰ)求f(x)的解析式;(Ⅱ)求f(x)的周期和单调递增区间;(Ⅲ)若关于x的方程f(x)﹣m=2在x∈[,]上有解,求实数m的取值范围.2016-2017学年山东省泰安市高一(下)期末数学试卷参考答案与试题解析一、选择题(共12小题,每小题5分,满分60分)1.(5分)sin15°cos15°的值是()A.B.C.D.【解答】解:sin15°cos15°=sin30°=,故选:B.2.(5分)为了检查某超市货架上的奶粉是否含有三聚氰胺,要从编号依次为1到50的袋装奶粉中抽取5袋进行检验,用每部分选取的号码间隔一样的系统抽样方法确定所选取的5袋奶粉的编号可能是()A.5,10,15,20,25 B.2,4,8,16,32C.1,2,3,4,5 D.7,17,27,37,47【解答】解:从编号依次为1到50的袋装奶粉中抽取5袋进行检验,采用系统抽样间隔应为=10,只有D答案中的编号间隔为10,故选:D.3.(5分)某单位在1~4 月份用电量(单位:千度)的数据如表:已知用电量y与月份x之间有较好的线性相关关系,其回归方程 5.25,由此可预测5月份用电量(单位:千度)约为()A.1.9 B.1.8 C.1.75 D.1.7【解答】解:∵=2.5,=3.5,线性回归方程是 5.25,∴3.5=2.5b+5.25,∴b=﹣0.7,∴y=﹣0.7x+5.25,x=5时,y=﹣3.5+5.25=1.75,故选:C.4.(5分)已知向量||=1,||=,,的夹角为45°,若=,,则在方向上的投影为()A.1 B.﹣1 C.D.﹣【解答】解:根据数量积的几何意义可知,在方向上的投影为||与向量,夹角的余弦值的乘积,∴在方向上的投影为||•cos,如图:||2=()2=1+2+=5.||=cos=﹣∴则在方向上的投影为﹣1.故选:B.5.(5分)已知圆x2+y2﹣2x+my=0上任意一点M关于直线x+y=0的对称点N也在圆上,则m的值为()A.﹣1 B.1 C.﹣2 D.2【解答】解:∵圆x2+y2﹣2x+my=0上任意一点M关于直线x+y=0的对称点N也在圆上,∴直线x+y=0经过圆心C(1,﹣),故有1﹣=0,解得m=2,故选:D.6.(5分)已知一组数据x1,x2,x3,x4,x5的平均数是2,方差是,那么另一组数据2x1﹣1,2x2﹣1,2x3﹣1,2x4﹣1,2x5﹣1的平均数,方差分别是()A.3,B.3,C.4,D.4,【解答】解:∵一组数据x1,x2,x3,x4,x5的平均数是2,方差是,∴另一组数据2x1﹣1,2x2﹣1,2x3﹣1,2x4﹣1,2x5﹣1的平均数为:2×2﹣1=3,方差为:=.故选:A.7.(5分)已知一扇形的周长为20cm,当这个扇形的面积最大时,半径R的值为()A.4 cm B.5cm C.6cm D.7cm【解答】解:∵l=20﹣2R,∴S=lR=(20﹣2R)•R=﹣R2+10R=﹣(R﹣5)2+25∴当半径R=5cm时,扇形的面积最大为25cm2.故选:B.8.(5分)执行如图所示的程序框图,若输入A的值为2,则输出的i值为()A.3 B.4 C.5 D.6【解答】解:A=2,i=1,s=0<A,s=1<A,i=2,s=<A,i=3,s=<A,i=4,s=<A,i=5,s=>A,输出i=5,故选:C.9.(5分)已知α为锐角,且5α的终边上有一点P(sin(﹣50°),cos130°),则α的值为()A.8°B.44°C.40°D.80°【解答】解:∵α为锐角,∴5α∈(0°,450°);∵5α的终边上有一点P(sin(﹣50°),cos130°),即点P(﹣sin50°,﹣cos50°),故点P在第三象限,即5α的终边在第三象限,再根据tan5α===cot50°=tan40°=tan(180°+40°)=tan220°,∴5α=220°,则α=44°,故选:B.10.(5分)已知角α,β均为锐角,且cosα=,sinβ=,则α﹣β的值为()A.B.C.D.【解答】解:∵角α,β均为锐角,且cosα=,sinβ=,∴sinα==,cosβ==,则sin(α﹣β)=sinαcosβ﹣cosαsinβ=•﹣•=﹣,再根据α﹣β∈(﹣,),可得α﹣β=﹣,故选:C.11.(5分)四边形ABCD中,AB=BC,AD⊥DC,AC=2,∠ACD=θ,若,则cos2θ等于()A.B.C.D.【解答】解:如图所示,取AC的中点O,连接OD,OB,∵AB=BC,OA=OC,∴OB⊥AC,∴•=0;又∵=,=+,=(+),∴(+)•=•+•=(+)•=(+)•(﹣)=﹣+=①,又AD⊥DC,∴+==4②,由①②解得=,∴||=,∴cosθ==;∴cos2θ=2cos2θ﹣1=2×﹣1=.故选:D.12.(5分)若函数f(x)=asinx+bcosx,(ab≠0)的图象向左平移个单位后得到的图象对应的函数是奇函数,则直线ax﹣by+c=0的斜率为()A.B.C.﹣D.﹣【解答】解:∵函数f(x)=asinx+bcosx=sin(x+∅),(tanφ=),把函数f(x)的图象向左平移个单位后得到的图象对应的函数是g(x)=sin(x++∅),再由g(x)是奇函数可得=k π,k∈z.∴tan∅=tan(kπ﹣)=﹣,即=﹣.故直线ax﹣by+c=0的斜率为=﹣,故选:D.二、填空题(共4小题,每小题5分,满分20分)13.(5分)当a为任意实数时,直线(a﹣1)x﹣y+a+1=0恒过定点C,则以C 为圆心,为半径的圆的方程是x2+y2+2x﹣4y=0.【解答】解:直线(a﹣1)x﹣y+a+1=0,即a(x+1)+(﹣x﹣y+1)=0,定点C的坐标是方程组的解,∴定点C的坐标是(﹣1,2),再由为半径可得圆的方程是(x+1)2+(y﹣2)2=5,即x2+y2+2x﹣4y=0,故答案为x2+y2+2x﹣4y=0.14.(5分)若sin(x+)=,则sin(﹣x)+sin2(﹣x)+cos(2x+)=.【解答】解:因为sin(x+)=,所以sin(﹣x)=sin(π﹣﹣x)=sin(x+)=,sin(﹣x)=sin[﹣(x+)]=cos(x+),则sin2(﹣x)=cos2(x+)=1﹣sin2(x+)=,所以sin(﹣x)+sin2(﹣x)+cos(2x+)==,故答案为:.15.(5分)已知△ABC中,AB=AC=4,BC=4,已知蚂蚁在△ABC的内部爬行,若不考虑蚂蚁的大小,则某时刻该蚂蚁距离△ABC的三个顶点距离均超过1的概率为1﹣.【解答】解:∵三角形的三边长分别是4,4,4,∴三角形的高AD=2,则△ABC的面积为S=×4×2=4;则该蚂蚁距离三角形的三个顶点的距离均超过1,对应的区域为图中阴影部分,三个小扇形的面积之和为一个整圆的面积的,圆的半径为1,则阴影部分的面积为S1=4﹣π•12=4﹣π,根据几何概型的概率公式得所求概率为P==1﹣.故答案为:1﹣.16.(5分)关于函数f(x)=cos(2x﹣)+sin(2x+),有①y=f(x)的最大值为;②y=f(x)的最小正周期是π④直线x=是函数y=f(x)的一条对称轴方程.其中正确命题的序号是②④.【解答】解:由题意得,f(x)=cos(2x﹣)+sin(2x+)=cos2x+sin2x+sin2x+cos2x=sin2x+cos2x=,①、当=1时,y=f(x)取到最大值为2,①不正确;②、由T=得,y=f(x)的最小正周期是π,②正确;③、由得,,所以y=f(x)在区间[﹣,]上不是单调函数,③不正确;④、当x=时,,所以直线x=是函数y=f(x)的一条对称轴方程,④正确,故答案为:②④.三、解答题(共6小题,满分70分)17.(10分)已知sinα+cosα=﹣,α为第二象限角.(1)求sinα﹣cosα的值;(2)求的值.【解答】解:(1)∵sinα+cosα=﹣,∴(sinα+cosα)2=sin2α+2sinαcosα+cos2α=1+2sinαcosα=,∴又(sinα﹣cosα)2=(sinα+cosα)2﹣4sinαcosα=.∵α为第二象限角,∴sinα>0,cosα<0,∴sinα﹣cosα>0.∴sinα﹣cosα=;(2)==.18.(12分)某市统计局就某地居民的月收入调查了10000人,并根据所得数据画出样本的频率分布直方图(每个分组包括左端点.不包括右端点.如第一组表示收入在[1000,1500)(1)求居民收入在[3000,3500)的频率;(2)根据频率分布直方图算出样本数据的中位数及样本数据的平均数;(3)为了分析居民的收入与年龄、职业等方面的关系,必须按月收入再从这10000人中按分层抽样方法抽出100人作进一步分析,则月收入在[2500,3000)的这段应抽取多少人?【解答】解:(1)月收入在[3000,3500)的频率为0.0003×500=0.15;(2)从左数第一组的频率为0.0002×500=0.1;第二组的频率为0.0004×500=0.2;第三组的频率为0.0005×500=0.25;∴中位数位于第三组,设中位数为2000+x,则x×0.0005=0.5﹣0.1﹣0.2=0.2⇒x=400.∴中位数为2400(元)由1250×0.1+1750×0.2+2250×0.25+2750×0.25+3250×0.15+3750×0.05=2400,样本数据的平均数为2400(元);(3)月收入在[2500,3000)的频数为0.25×10000=2500(人),∵抽取的样本容量为100.∴抽取比例为=,∴月收入在[2500,3000)的这段应抽取2500×=25(人).以上定义为“高个子”,其他队员定义为“非高个子”.按照“高个子”和“非高个子”用分层抽样的方法共抽取5名队员.(1)从这5名队员中随机选出2名队员,求这2名队员中有“高个子”的概率;(2)求这5名队员中,恰好男女“高个子”各1名队员的概率.【解答】解:(1)由题意及茎叶图得:“高个子”共8名队员,“非高个子”共12名队员,共抽取5名队员,故从“高个子”队员中抽取2名队员,记为A,B,从“非高个子”中抽取3名队员,记为a,b,c,从中选出2名队员共有=10种选法,分别为:AB,Aa,Ab,Ac,Ba,Bb,Bc,ab,ac,bc,这2名队员中有“高个子”的选法有7种,分别是:AB,Aa,Ab,Ac,Ba,Bb,Bc,故选取2名队员中有“高个子”的概率是p1=.(2)由茎叶图知“高个子”男队员有4名,记为D,E,F,G,“高个子”女队员有4名,记为d,e,f,g,从中抽取2名队员,共有=28种抽法,分别为:DE,DF,DG,Dd,De,Df,Dg,EF,EG,Ed,Ee,Ef,Eg,FG,Fd,Fe,Ff,Fg,gd,Ge,Gf,Gg,de,df,dg,ef,eg,fg,其中,男女“高个子”各1名队员的抽法有16种,∴这5名队员中,恰好男女“高个子”各1名队员的概率p2=.20.(12分)如图,某市园林局准备绿化一块直径为BC的半圆形空地,△ABC 以外的地方种草,△ABC的内接正方形PQRS为一水池,其余的地方种花.若BC=a (a为定值),∠ABC=α,设△ABC的面积为S1,正方形PQRS的面积为S2;(2)当α为何值时,取得最大值,并求出此最大值.【解答】解:(1)在Rt△ABC中,BC=a,∠ABC=α,∴AB=acosα,AC=asinα,∴S1==,设正方形PQRS的边长为x,则BP=,AP=xcosα,由BP+AP=,AB=acosα,又AP+BP=AB,∴x==,∴S2=x2=()2=.(2)==,令sin2α=t,由0<α<,得0<2α<π,∴0<t≤1.∴==,0<t≤1,设f(t)=t+(0<t≤1),任取0<t1<t1≤1,则f(t1)﹣f(t2)=﹣=(t1﹣t2),>0,∴f(t)=t++4在(0,1]上单调递减,∴f(t)≥9,∴0<≤,∴的最大值为,此时α=.21.(12分)已知圆O:x2+y2=4,圆O与x轴交于A,B两点,过点B的圆的切线为l,P是圆上异于A,B的一点,PH垂直于x轴,垂足为H,E是PH的中点,延长AP,AE分别交l于F,C.(1)若点P(1,),求以FB为直径的圆的方程,并判断P是否在圆上;(2)当P在圆上运动时,证明:直线PC恒与圆O相切.【解答】(1)证明:由P(1,),A(﹣2,0)∴直线AP的方程为.令x=2,得F(2,).(2分)由E(1,),A(﹣2,0),则直线AE的方程为y=(x+2),令x=2,得C(2,).(4分)∴C为线段FB的中点,以FB为直径的圆恰以C为圆心,半径等于.∴圆的方程为,且P在圆上;(2)证明:设P(x0,y0),则E(x0,),则直线AE的方程为在此方程中令x=2,得C(2,)直线PC的斜率为=﹣=﹣若x0=0,则此时PC与y轴垂直,即PC⊥OP;(13分)∵×(﹣)=﹣1∴PC⊥OP∴直线PC与圆O相切.(16分)22.(12分)设函数f(x)=•,其中=(2sin(+x),cos2x).=(sin(+x),﹣),x∈R,(Ⅰ)求f(x)的解析式;(Ⅱ)求f(x)的周期和单调递增区间;(Ⅲ)若关于x的方程f(x)﹣m=2在x∈[,]上有解,求实数m的取值范围.【解答】解:(Ⅰ)=(2sin(+x),cos2x).=(sin(+x),﹣),则f(x)=•=2sin2(x+)﹣cos2x=1﹣cos(2x+)﹣cos2x=1+sin2x﹣cos2x=1+2sin(2x﹣);(Ⅱ)f(x)的周期为T==π,由2kπ﹣≤2x﹣≤2kπ+,k∈Z,可得kπ﹣≤x≤kπ+,可得f(x)的单调增区间为[kπ﹣,kπ+],k∈Z;(Ⅲ)由x∈[,],sin(2x ﹣)∈[,1],则f(x)的值域为[2,3],由m+2∈[2,3],可得m∈[0,1].赠送初中数学几何模型【模型五】垂直弦模型:图形特征:运用举例:1.已知A、B、C、D是⊙O上的四个点.(1)如图1,若∠ADC=∠BCD=90°,AD=CD,求证AC⊥BD;(2)如图2,若AC⊥BD,垂足为E,AB=2,DC=4,求⊙O的半径.O DAB CEAOD CB2.如图,已知四边形ABCD 内接于⊙O ,对角线AC ⊥BD 于P ,设⊙O 的半径是2。