试卷二

2024-04-20

试卷二(共6篇)

篇1:试卷二

一、考试情况概况:

全班48人参加考试,考试时间共60分钟,试卷总分是100分。全体学生都能够在规定的时间内完成答题,卷面整洁。本张试卷有些题目有一定难度,为学生初次涉及的题型。一小部分孩子还没完全进入学习状态,成绩不是很理想,相信在家长、老师、孩子的共同努力下,迎难而上,学习问题将迎刃而解。

二、试卷分析

1.第一题:听力测试:这道题只要是考察会认的字、句子连线和听读短文填空,绝大多数同学都做得不错。

2.第二题:语海畅游。

这道题目很灵活地考察了学生拼音的拼读情况的掌握情况、词语积累、连词成句、古诗词识记和造句等方面的语文能力。学生必需要在充分理解题意的基础上做题。绝大多数孩子正确地答题。

3.第1小题:看拼音,写词语。本题主要是考察学生的识字情况和拼读能力。

出错原因:

(1)个别孩对拼音拼读掌握不牢。

(2)个别孩子对生字词识记还不够熟练。

4.第2~9小题主要考察课本内容的掌握程度。大多数孩子能完全正确地答题。但第2小小题(选出正确读音的序号,填在相应的括号里。)很多同学都不理解题意,没有写序号,直接把正确的答案写下来,导致失分较重。另第3小题(把下面词语补充完整。)很多同学都把“补”字的部首写成示子旁。

出错原因:平时少训练这样的内容,另因为学生平时读课外书的机会少,导致理解能力差。

5.第4小题:连一连,熟记成语。本题主要考察八字成语,学生答得不错

6.第5小题:选字组词,用“√”表示,主要考察学生同音字的识记。

7.第6、8小题:主要考查学生的表达能力和连词成句的能力,很多同学写完句子忘了写标点。

8.第7、9小题:主要考查学生对课文内容的识记,很多同学答得都不错。

9.第三题阅读平台:主要考查学生对短文内容的理解,第3、4小题错误率比较高。主要是理解能力比较差。

10.第四题能说会道你有很多优点,你发现了吗?想一想,然后写下来,个别理解能力差的同学不理解“优点”这个词。所以就无从下手。

11.写话写自己感兴趣的事,有个别同学写的不错,但也有三两个同学不会写,导致平均分不高。

二,今后措施

抓识字。课堂教学中,讲究生字教学的方法,采用各种学习方法帮助学生记忆生字。例如:猜谜语、加一加、减一减、换一换,在课后,要多抽出时间来巩固生字,创设机会让学生在特定的情境中识字,拓展识字的途径,让学生多识字,多阅读。

抓课文背诵,这次考试相当多内容都是考查学生对课文内容的识记

抓阅读。力为学生营造一个“自主、合作、探究”的研究性阅读氛围,珍视学生的阅读体验。给予学生更多的自我阅读的时间和空间,使学生在潜心读书中,有所思、有所悟、有所发现。鼓励学生在课外多读书,多看书,并和学生及家长一起讨论,让学生在一番议论、评价中,加强对课文的理解,同时也提高表达和评价能力。另外还要加强学生普通话的训练,从一年级开始就注重普通话的标准训练。

抓表达能力

力求多形式、多角度地创设交际的情境,鼓励学生人人开口,调动学生参与交流的热情,让学生在具体的实践体验中敢于、乐于与人交际,激活学生的思维,让学生充分对话,实现真正意义上的生与生、师与师的互动。培养学生的表达能力。

[小学二年级班语文期末试卷分析小学二年级班语文期末试卷分析小学二年级班语文期末试卷分析 教师随]

篇2:试卷二

(二)一、单项选择题

1-5ADBDD6-10ACDCB

11-15DACBA16-20CBBAC

21-25CDCDD26-28CBC

二、简答题

29、(1)肖像权 生命健康权。

(2)《中华人民共和国宪法》、《中华人民共和国未成年人保护法》、《中华人民共和国民法通则》、《中华人民共和国刑法》、《中华人民共和国婚姻法》等。

(3)大明的做法:第一、与影楼协商,要求停止侵权,赔偿损失;

第二、寻求工商管理部门、法律援助机构的帮助;

第三、到人民法院起诉该影楼的侵权行为。

小雨的做法:第一、与父亲沟通,要求父亲改变粗暴的教育方式;

第二、寻求老师、学校、妇联、居委会等个人或组织的帮助;

第三、到人民法院起诉父亲的侵权行为。

三、辨析题

30、不赞成。第一、网络有虚拟性,但公民在网络上仍要受到道德、法律等社会规则的约束。第二、公民的权利和义务是统一的。公民在网络上行使言论自由时,必须履行法律规定的义务,采用合法的方式,不得损害国家、社会、集体的利益,不得损害其他公民的合法权益。公民在网上行使议论自由权,要增强社会责任感,在发言之前,应首先考虑自己的发言是否有确凿根据,是否会给他人和社会造成不良影响。不捏造事实,不传播缺乏事实根据的流言蜚语。

四、分析说明题

31、(1)隐私对公民的个人生活安宁、安全十分重要;隐私越来越受到大家的重视;既要保护自己的隐私,也要尊重他人的隐私。

(2)第一、隐私,是公民与公共利益、群体利益无关的纯个人私事。公民的隐私包括私人信息、个人私事、私人领域等等。

第二、隐私与个人的生活密切相关,只有保护好个人隐私,人才能自由地放松自己的身体和心灵,获得内心世界的安全感和私人生活的安宁,体会到做人的尊严。否则,就可能惶惶不可终日。

第三、我国法律赋予公民隐私权,保护公民的隐私权,以促进社会和谐、维护社会安定。作为公民,应该自觉尊重和维护隐私及隐私权。

(3)第一、树立隐私意识,强化责任与信誉意识,自觉尊重他人隐私;

第二、强化自我保护意识,给自己的隐私上把锁;

第三、勇敢地拿起法律武器,维护自己的隐私权,与侵权行为做斗争。

五、综合探究题

32、(1)常某的肖像权受到侵害,毛某的名誉权受到侵害。

(2)说明我国法律保护公民的合法权益。

篇3:中考模拟试卷(二)

从A、B、C、D四个选项中,选出可以填入空白处的最佳选项。

( )1.—Can you write out the word“huge”?—Yes.There is______“h”and______“u”in the word.

A.a,an B.an,a C.the,a D.a,the

( )2.—Why don't you do it yourself?—Sorry,I don't think I'm______to.I need someone's help.

A.kind B.ready C.afraid D.able

( )3.—I have got a bad cold.I feel terrible.—______

A.All right.B.Is that so?

C.Sorry to hear that D.I am afraid so.

( )4.—Jimmy,your books are everywhere on your desk.—Oh,sorry.I'll______right away.

A.put them away B.put them up C.put them on D.put them down

( )5.—I don't know______Mr White come to our school.—To give us a talk on how to learn English well.

A.how B.when C.where D.why

( )6.—Why don't you give the wallet to the man at once?—He______before I realized it was his.

A.had been away B.has gone

C.had gone away D.has been away

( )7.Doctor Bethune did what he could______the wounded soldiers.

A.save B.to save C.saved D.saving

( )8.—______does your robot need repairing?—Every six months.

A.How long B.How often C.When D.What time

( )9.—Can I make a U-turn in the middle of the block?—No,you can't.Look at the sign.

Which sign does the second speaker refer to?

( )10.—Mum,I've finished my composition.Would you like me to read it to you?—Ok.______.

A.Let's see it B.How good it is C.You're good D.I'm sure I'll enjoy it

( )11.—Who taught______to make a home page?—Nobody.I taught______.

A.you,me B.you,myself C.yourself,me D.yourself,myself

( )12.—I guess there is______on the table,right?—No,there are lots of forks.

A.nothing B.something C.anything D.everything

( )13.—Did you hear Tom singing in the music room at nine last night?—No,it______be Tom.He has gone to Washington.

A.may not B.can't C.mustn't D.couldn't

( )14.—Tea or coffee?—______.I really don't mind.

A.None B.Either C.Neither D.All

( )15.—What does your brother look like?—______

A.He likes watching TV.B.He is a worker in a factory.

C.He is very tall and strong.D.He plays basketball every day.

Ⅱ.完形填空

阅读下面短文,从短文后所给各题的四个选项(A、B、C、D)中,选出可以填入空白处的最佳选项。

The day after Thanksgiving has become America's wildest shopping day.Closed all day on 16,chain stores all across the nation open early on Friday.Some 17 open at 12:01Friday morning,18 others open at 4 a.m.Some“sleepyhead”stores,like Target this year,don't open their doors on Friday 19 6 a.m.From Friday to the day before Christmas,this is the season when businesses make 20 25%of their whole year's revenue(收入).This seasonputs many businesses“in the black”—that is,into profitability(盈利)—for the year.

Reporters from local TV stations 21 people who camp out in front of stores a day or two before the doors open on Friday.These people patiently 22 line to get products that are discounted 50 percent or more.

“Oh,we have fun,”said one camper.“We bring games to play,we watch TV and order lots of pizza,and we meet interesting people.And,most 23 of all,we save big dollars!”Each store has plenty of goods(货物)reduce from 10%to 50%.

Not all Americans like this crazy shopping.Reverend William Graham,pastor(牧师)of the Church(教堂)of the Risen Jesus,wants to 24 the name of Black Friday.“We want to call it Remember Jesus Friday.People should start the season 25 the right attitude(态度).Christmastime has become a Season of Shopping.We want to make it a Season of 26.And we don't mean giving IPods,DVDs,flat screen TVs,and so on.We mean giving your back,your mind,and your hands.Help an old lady 27 her house.Teach a kid how to 28.Visit sick people in the hospital or in nursing homes.29 the rubbish in your neighborhood.Give blood to the 30.Do volunteer work for charities.Celebrate Christmas by remembering Jesus and forgetting Santa Claus.”

( )16.A.Wednesday B.Thursday C.Friday D.Saturday

( )17.A.stores B.schools C.cinemas D.restaurants

( )18.A.or B.that C.since D.while

( )19.A.at B.since C.until D.from

( )20.A.as much as B.as many as C.as far as D.not the same as

( )21.A.stop B.find C.interview D.tell

( )22.A.wait for B.wait in C.wait at D.wait

( )23.A.dangerous B.careful C.beautiful D.important

( )24.A.give B.change C.make D.call

( )25.A.at B.with C.on D.for

( )26.A.Taking B.Selling C.Giving D.Thanking

( )27.A.make up B.take up C.get up D.clean up

( )28.A.read B.play C.cry D.shop

( )29.A.Pick up B.Give up C.Send up D.shut up

( )30.A.Oxfam B.UNICEF C.Red Cross D.ORBIS

Ⅲ.阅读理解

阅读下列短文,从每题所给的四个选项(A、B、C、D)中,选出最佳选项。

Colleen was in a hurry,which made her driving even more careless than usual.Her boyfriendSimon had already warned her many times of failing to stop completely at stop signs.That's what they call a“California,or rolling,stop,”he told her.

“If the police catch you sliding through a stop sign like that,”he said,“they'll give you a ticket for running a stop sign.That means at least a$100 ticket,plus eight hours of driving school for another$30.”

“I know,I know,”she replied.“But I never do it when they're around,so how can they catch me?”Simon was about to tell her that police have a habit of suddenly appearing out of nowhere,but Colleen told him to stop thinking so negatively.“You are bad luck,”she said.“When you talk like that,you make bad things happen.”He told her that life doesn't work that way.

Colleen was in a hurry because she needed to drop off a package at the post office.It had to get to New York by Wednesday.She exited the freeway and pulled up at the stop sign.One car was in front of her.Colleen looked to the right and to the left.No cars were coming.It was safe to pull out.She hit the gas pedal.Bang!The car in front of her was still sitting there.The driver was a young woman,who got out of her car,walked back to look at the damage to her new car,and started shouting at Colleen.

( )31.California stop means______.

A.stop at California B.not to stop completely

C.to stop completely D.stop at the stop sign

( )32.Anyone should______if he or she doesn't stop at the stop sign.

A.pay a fine B.give driving school$100

C.give the police 30dollars D.never drive a car again

( )33.Colleen's boy friend Simon is______.

A.bad luck and made bad things happen B.a police at the stop signsC.a good guy who obeys the traffic rules D.a teacher in the driving school

( )34.Colleen was in a hurry because______.

A.she wanted to get to the post office earlier

B.she wanted to get to New York by Wednesday

C.she had left the package in the office and wanted to get it back

D.there was no need for her to stop at the stop sign

Ⅳ.词汇运用

A.根据句意及汉语提示或英文解释,写出句中所缺单词,每空限填一个单词。

35.There are many__________(蝴蝶)in the garden in front of my house.

36.The plane was in the sky just now.But it__________(消失)after a few minutes.

37.She is a lovely girl and she often__________(面带)a smile on her face.

38.Look!The house is__________(燃烧).Let's go and help to put the fire out.

39.My father is very clever and he can__________(to find a way of dealing with something)the problems easily.

B.根据句意或句子的语法要求,用括号中所给单词的适当形式填空。

40.I don't know the__________(true)about it.

41.Daniel's friends enjoyed__________(they)at the robot exhibition center last week

42.By 2100,we will spend only a few hours__________(travel)to Mars in space shuttles.

43.—Where is your English teacher?—She__________(put)up some pictures on the wall in her office.

44.My mother isn't at home.She__________(go)to the shopping mall with her friends.

Ⅴ.根据所给汉语完成下列句子,每空词数不限

45.后来,政府意识到那是一个非常严重的问题并且采取措施减少污染。

Later,the government realized it's a very__________and took actions to__________.

46.一些人看不起盲人是不对的。

________________that some people_________________the blind people.

47.顺便说一下,我的新书刚刚出版。

____________________,my new book________________________.

48.我弟弟上次英语考试不及格,因为他痴迷于网络游戏。

My brother_______________________________________________.

49.越来越多的人喜欢通过电话和朋友聊天。

___________________people enjoy__________________________.

Ⅵ.任务型阅读

阅读下列短文,根据短文内容填写句中的空格,每空限填一词。

May wanted to sell smoke lighters(打火机)in America.Her friend said that Mr Wang was a manager of a big factory in China.The factory made lighters.She gave May Mr Wang's phone number.May called Mr Wang,and invited him to Los Angeles.She arranged several meetings between Mr Wang and some US wholesalers(批发商).Because he did not speak English,she was the interpreter(口译)at the meetings.Mr Wang promised to give May some pay for whatever business deal(交易)was made.

No deal was made at the first three meetings.The last meeting was with a Chinese salesman.He spoke Chinese,so there was no need for May to interpret his words.She sat there throughout the meeting and listened.The two men discovered that they both had grown up in Guiyang,a large city in southwest China.At the end of the meeting,still no deal was made.Everyone shook hands.

May and Mr Wang walked out to her car.Then Mr Wang said that he had forgotten something.He excused himself and walked back to the office.May waited for a moment.Then,suspicious(怀疑的),she went back to the office and heard the two men making a deal behind her back.Mr Wang was cutting her out of her payment.

May went back out to her car and waited.Mr Wang was whistling as he returned to the car.He apologized for making her wait and said he was returning to China the next day.She didn't say anything about what she had overheard.She went home and tried not to cry about what had just happened—she must be strong.

A.May is a saleswoman in America.Her friend 50 Mr Wang to her.She 51 Mr Wang to Los Angeles because she wanted to make a 52 with him.

B.May arranged exactly 53 meetings in all.She was an interpreter at the meetings because she can speak both English and 54.

C.At the last meeting,Mr Wang met the Chinese who is from his 55.He made a deal with him 56 the meeting behind May's back because he wanted to save some 57.

D.When Mr Wang walked back to the office,he didn't 58 that May followed him back to it.When May heard 59 they talked,she felt that she wanted to cry.

Ⅶ.书面表达

网上有人制作一部短片,题为When the buying stops,the killing can,too,著名电影演员成龙也现身该短片,说出同样的话,现撷取短片部分图片,你看完之后有何感想?

请以Wild Animals are our friends为题,写一篇100个词左右的短文,声讨捕猎者捕杀动物的行为,并谈谈如何保护野生动物。

they kill rare(稀有的)fish to sell them to the restaurants

they kill elephants to sell their ivories(象牙)

they kill tigers for their skins and bones

they kill bears for their paws

Keys:

Ⅰ.选择填空

1—5 BDCAD 6—10 CBBAD 11—15 BADBC

Ⅱ.完形填空

16—20 BADCA 21—25 CBDBB 26—30 CDAAC

Ⅲ.阅读理解

31—34 BACA

Ⅳ.词汇运用

35.butterflies 36.disappeared 37.wears 38.burning 39.solve 40.truth 41.themselves42.traveling 43.is putting 44.has gone

Ⅴ.根据所给汉语完成下列句子,每空词数不限。

45.serious problem;reduce the pollution

46.It's not right;look down on

47.By the way;has just come out

48.failed in English last time because he was crazy about the computer games

49.More and more;chatting with friends on telephone

Ⅵ.任务型阅读

阅读下列短文,根据短文内容填写句中的空格,每空限填一词。

50.introduced 51.invited 52.deal 53.four 54.Chinese 55.hometown 56.after57.money 58.notice/know/realize 59.what

Ⅶ.书面表达

One possible version:

篇4:期末考试测试卷(二)

1.已知R为实数集,M={x|x2-2x<0},N={x|x≥1},则M∩(CRN)=    .

2.命题:“x∈(0,+∞),x2+x+1>0”的否定是    .

3.已知z=(a-i)(1+i)(a∈R,i为虚数单位),若复数z在复平面内对应的点在实轴上,则a=   .

4.设不等式组0≤x≤2,

0≤y≤2,表示平面区域为D,在区域D内随机取一个点,则此点到坐标原点的距离大于2的概率是    .

5.阅读右图所示的程序框图,运行相应的程序,输出的s值等于    .

6.椭圆x2a2+y2b2=1(a>b>0)的右焦点为F1,右准线为l1,若过点F1且垂直于x轴的弦的弦长等于点F1到l1的距离,则椭圆的离心率是    .

7.已知正方形ABCD的边长为1,点E是AB边上的动点,则DE·DC的最大值为    .

8.设a,b∈R,且a≠2,若定义在区间(-b,b)内的函数f(x)=lg1+ax1+2x是奇函数,则a+b的取值范围是   .

9.巳知函数f(x)=cosx(x∈(0,2π))有两个不同的零点x1,x2,且方程f(x)=m有两个不同的实根x3,x4.若把这四个数按从小到大排列构成等差数列,则实数m的值为    .

10.关于x的不等式x2+25+|x3-5x2|≥ax在[1,12]上恒成立,则实数a的取值范围是    .

11.已知正数x,y满足(1+x)(1+2y)=2,则4xy+1xy的最小值是    .

12.已知函数f(x)=x4+ax3+2x2+b,其中a,b∈R.若函数f(x)仅在x=0处有极值,则a的取值范围是    .

13.已知a,b,c(a<b<c)成等差数列,将其中的两个数交换,得到的三个数依次成等比数列,则a2+c22b2的值为    .

14.如图,用一块形状为半椭圆x2+y24=1(y≥0)的铁皮截取一个以短轴BC为底的等腰梯形ABCD,记所得等腰梯形ABCD的面积为S,则1S的最小值是    .

二、解答题(本大题共6小题,共计90分)

15.(本小题满分14分)

在△ABC中,A,B,C为三个内角a,b,c为三条边,π3<C<π2,且ba-b=sin2CsinA-sin2C.

(1)判断△ABC的形状;

(2)若|BA+BC|=2,求BA·BC的取值范围.

16.(本小题满分14分)

如图,直三棱柱ABCA1B1C1中,D、E分别是棱BC、AB的中点,点F在棱CC1上,已知AB=AC,AA1=3,BC=CF=2.

(1)求证:C1E∥平面ADF;

(2)设点M在棱BB1上,当BM为何值时,平面CAM⊥平面ADF?

17.(本小题满分15分)

已知椭圆C:x2a2+y2b2=1(a>b>0)的离心率为12,且经过点P(1,32).

(1)求椭圆C的方程;

(2)设F是椭圆C的右焦点,M为椭圆上一点,以M为圆心,MF为半径作圆M.问点M满足什么条件时,圆M与y轴有两个交点?

(3)设圆M与y轴交于D、E两点,求点D、E距离的最大值.

18.(本小题满分15分)

如图,AB是沿太湖南北方向道路,P为太湖中观光岛屿,Q为停车场,PQ=5.2km.某旅游团游览完岛屿后,乘游船回停车场Q,已知游船以13km/h的速度沿方位角θ的方向行驶,sinθ=513.游船离开观光岛屿3分钟后,因事耽搁没有来得及登上游船的游客甲为了及时赶到停车地点Q与旅游团会合,立即决定租用小船先到达湖滨大道M处,然后乘出租汽车到点Q(设游客甲到达湖滨大道后能立即乘到出租车).假设游客甲乘小船行驶的方位角是α,出租汽车的速度为66km/h.

(1)设sinα=45,问小船的速度为多少km/h时,游客甲才能和游船同时到达点Q;

(2)设小船速度为10km/h,请你替该游客设计小船行驶的方位角α,当角α余弦值的大小是多少时,游客甲能按计划以最短时间到达Q.

19.(本小题满分16分)

已知各项均为正数的等差数列{an}的公差d不等于0,设a1,a3,ak是公比为q的等比数列{bn}的前三项,

(1)若k=7,a1=2

(i)求数列{anbn}的前n项和Tn;

(ii)将数列{an}和{bn}的相同的项去掉,剩下的项依次构成新的数列{cn},设其前n项和为Sn,求S2n-n-1-22n-1+3·2n-1(n≥2,n∈N*)的值;

(2)若存在m>k,m∈N*使得a1,a3,ak,am成等比数列,求证k为奇数.

20.(本小题满分16分)

已知函数f(x)=-x3+x2+b,g(x)=alnx.

(1)若f(x)在x∈[-12,1)上的最大值为38,求实数b的值;

(2)若对任意x∈[1,e],都有g(x)≥-x2+(a+2)x恒成立,求实数a的取值范围;

(3)在(1)的条件下,设F(x)=f(x),x<1

g(x),x≥1,对任意给定的正实数a,曲线y=F(x)上是否存在两点P,Q,使得△POQ是以O为直角顶点的直角三角形(O为坐标原点),且此三角形斜边中点在y轴上?请说明理由.

附加题

21.[选做题] 在A、B、C、D四小题中只能选做2题,每小题10分,共计20分

A.选修41:(几何证明选讲)

如图,从圆O外一点P作圆O的两条切线,切点分别为A,B,AB与OP交于点M,设CD为过点M且不过圆心O的一条弦,

求证:O、C、P、D四点共圆.

B.选修42:(矩阵与变换)

已知二阶矩阵M有特征值λ=3及对应的一个特征向量e1=1

1,并且矩阵M对应的变换将点(-1,2)变换成(9,15),求矩阵M.

C.选修44:(坐标系与参数方程)

在极坐标系中,曲线C的极坐标方程为ρ=22sin(θ-π4),以极点为原点,极轴为x轴的正半轴建立平面直角坐标系,直线l的参数方程为

x=1+45t

y=-1-35t(t为参数),求直线l被曲线C所截得的弦长.

D.选修45(不等式选讲)

已知实数x,y,z满足x+y+z=2,求2x2+3y2+z2的最小值;

[必做题] 第22题、第23题,每小题10分,共计20分

22.袋中装着标有数字1,2,3,4的卡片各1张,甲从袋中任取2张卡片(每张卡片被取出的可能性都相等),并记下卡面数字和为X,然后把卡片放回,叫做一次操作.

(1)求在一次操作中随机变量X的概率分布和数学期望E(X);

(2)甲进行四次操作,求至少有两次X不大于E(X)的概率.

23.(本小题满分10分)

对一个边长互不相等的凸n(n≥3)边形的边染色,每条边可以染红、黄、蓝三种颜色中的一种,但是不允许相邻的边有相同的颜色.所有不同的染色方法记为P(n).

(1)求P(3),P(4),P(5);

(2)求P(n).

参考答案

一、填空题

1. {x|0<x<1}

2. x∈(0,+∞),x2+x+1≤0

3. 1

4. 4-π4

5. -3

6. 12

7. 1

8. (-2,-32]

9. -32

10. (-∞,10]

11. 12

12. [-83,83]

13. 10

14. 239

二、解答题

15.(1)解:由ba-b=sin2CsinA-sin2C及正弦定理有:sinB=sin2C,

∴B=2C或B+2C=π,若B=2C,且π3<C<π2,∴23π<B<π,B+C>π(舍);∴B+2C=π,则A=C,∴△ABC为等腰三角形.

(2)∵|BA+BC|=2,∴a2+c2+2ac·cosB=4,∴cosB=2-a2a2(∵a=c),而cosB=-cos2C,∴12<cosB<1,∴1<a2<43,∴BA·BC=accosB=a2cosB=2-a2∈(23,1).

16.解:(1)连接CE交AD于O,连接OF.

因为CE,AD为△ABC中线,

所以O为△ABC的重心,CFCC1=COCE=23.

从而OF∥C1E.

OF面ADF,C1E平面ADF,

所以C1E∥平面ADF.

(2)当BM=1时,平面CAM⊥平面ADF.

在直三棱柱ABCA1B1C1中,

由于B1B⊥平面ABC,BB1平面B1BCC1,所以平面B1BCC1⊥平面ABC.

由于AB=AC,D是BC中点,所以AD⊥BC.又平面B1BCC1∩平面ABC=BC,

所以AD⊥平面B1BCC1.

而CM平面B1BCC1,于是AD⊥CM.

因为BM=CD=1,BC=CF=2,所以Rt△CBM≌Rt△FCD,所以CM⊥DF.

DF与AD相交,所以CM⊥平面ADF.

CM平面CAM,所以平面CAM⊥平面ADF.

当BM=1时,平面CAM⊥平面ADF.

17.解:(1)∵椭圆x2a2+y2b2=1(a>b>0)的离心率为12,且经过点P(1,32),

∴a2-b2a=12

1a2+94b2=1,即3a2-4b2=0

1a2+94b2=1,

解得a2=4

b2=3,

∴椭圆C的方程为x24+y23=1.

(2)易求得F(1,0).设M(x0,y0),则x204+y203=1,

圆M的方程为(x-x0)2+(y-y0)2=(1-x0)2+y02,

令x=0,化简得y2-2y0y+2x0-1=0,Δ=4y20-4(2x0-1)>0……①.

将y20=3(1-x204)代入①,得3x20+8x0-16<0,解出-4

又∵-2≤x0≤2,∴-2≤x0<43.

(3)设D(0,y1),E(0,y2),其中y1

DE=y2-y1=4y20-4(2x0-1)

=-3x20-8x0+16=-3(x0+43)2+643,

当x0=-43时,DE的最大值为833.

18.解:(1)如图,作PN⊥AB,N为垂足.

sinθ=513,sinα=45,

在Rt△PNQ中,

PN=PQsinθ=5.2×513=2(km),

QN=PQcosθ=5.2×1213=4.8(km).

在Rt△PNM中,

MN=PNtanα=243=1.5(km).

设游船从P到Q所用时间为t1h,游客甲从P经M到Q所用时间为t2h,小船的速度为v1km/h,则

t1=PQ13=26513=25(h),

t2=PMv1+MQ66=2.5v1+3.366=52v1+120(h).

由已知得:t2+120=t1,52v1+120+120=25,∴v1=253.

∴小船的速度为253km/h时,游客甲才能和游船同时到达Q.

(2)在Rt△PMN中,

PM=PNsinα=2sinα(km),

MN=PNtanα=2cosαsinα(km).

∴QM=QN-MN=4.8-2cosαsinα(km).

∴t=PM10+QM66=15sinα+455-cosα33sinα=1165×33-5cosαsinα+455.

∵t′=1165×5sin2α-(33-5cosα)cosαsin2α

=5-33cosα165sin2α,

∴令t′=0得:cosα=533.

当cosα<533时,t′>0;当cosα>533时,t′<0.

∵cosα在α∈(0,π2)上是减函数,

∴当方位角α满足cosα=533时,t最小,即游客甲能按计划以最短时间到达Q.

19.(1)因为k=7,所以a1,a3,a7成等比数列,又{an}是公差d≠0的等差数列,

所以(a1+2d)2=a1(a1+6d),整理得a1=2d,又a1=2,所以d=1,

b1=a1=2,q=b2b1=a3a1=a1+2da1=2,

所以an=a1+(n-1)d=n+1,bn=b1×qn-1=2n,

①用错位相减法或其它方法可求得{anbn}的前n项和为Tn=n×2n+1;

②因为新的数列{cn}的前2n-n-1项和为数列{an}的前2n-1项的和减去数列{bn}前n项的和,

所以S2n-n-1=(2n-1)(2+2n)2-2(2n-1)2-1=(2n-1)(2n-1-1).

所以S2n-n-1-22n-1+3·2n-1=1(n≥2,n∈N*).

(2)由(a1+2d)2=a1(a1+(k-1))d,整理得4d2=a1d(k-5),

因为d≠0,所以d=a1(k-5)4,所以q=a3a1=a1+2da1=k-32.

因为存在m>k,m∈N*使得a1,a3,ak,am成等比数列,

所以am=a1q3=a1(k-32)3,

又在正项等差数列{an}中,am=a1+(m-1)d=a1+a1(m-1)(k-5)4,

所以a1+a1(m-1)(k-5)4=a1(k-32)3,又因为a1>0,

所以有2[4+(m-1)(k-5)]=(k-3)3,

因为2[4+(m-1)(k-5)]是偶数,所以(k-3)3也是偶数,

即k-3为偶数,所以k为奇数.

20.解:(1)由f(x)=-x3+x2+b,得f′(x)=-3x2+2x=-x(3x-2),

令f′(x)=0,得x=0或23.

列表如下:

x-12(-12,0)0(0,23)23(23,1)

f′(x)-0+0-

f(x)f(-12)递减极小值递增极大值递减

由f(-12)=38+b,f(23)=427+b,∴f(-12)>f(23),即最大值为f(-12)=38+b=38,∴b=0.

(2)由g(x)≥-x2+(a+2)x,得(x-lnx)a≤x2-2x.

∵x∈[1,e],∴lnx≤1≤x,且等号不能同时取,∴lnx<x,即x-lnx>0,

∴a≤x2-2xx-lnx恒成立,即a≤(x2-2xx-lnx)min.

令t(x)=x2-2xx-lnx,x∈[1,e]),求导得,

t′(x)=(x-1)(x+2-2lnx)(x-lnx)2,

当x∈[1,e]时,x-1≥0,lnx≤1,x+2-2lnx>0,从而t′(x)≥0,

∴t(x)在[1,e]上为增函数,

∴tmin(x)=t(1)=-1,∴a≤-1.

(3)由条件,F(x)=-x3+x2,x<1

alnx,x≥1,

假设曲线y=F(x)上存在两点P,Q满足题意,则P,Q只能在y轴两侧,

不妨设P(t,F(t))(t>0),则Q(-t,t3+t2),且t≠1.

∵△POQ是以O(O为坐标原点)为直角顶点的直角三角形,

∴OP·OQ=0,∴-t2+F(t)(t3+t2)=0…(*),

是否存在P,Q等价于方程(*)在t>0且t≠1时是否有解.

①若0

此方程无解;

②若t>1时,(*)方程为-t2+alnt·(t3+t2)=0,即1a=(t+1)lnt,

设h(t)=(t+1)lnt(t>1),则h′(t)=lnt+1t+1,

显然,当t>1时,h′(t)>0,即h(t)在(1,+∞)上为增函数,

∴h(t)的值域为(h(1),+∞),即为(0,+∞),

∴当a>0时,方程(*)总有解.

∴对任意给定的正实数a,曲线y=F(x)上总存在两点P,Q,使得△POQ是以O(O为坐标原点)为直角顶点的直角三角形,且此三角形斜边中点在y轴上.

附加题

21.A.选修41:(几何证明选讲)

证明:因为PA,PB为圆O的两条切线,所以OP垂直平分弦AB,

在Rt△OAP中,OM·MP=AM2,

在圆O中,AM·BM=CM·DM,

所以,OM·MP=CM·DM,

又弦CD不过圆心O,所以O,C,P,D四点共圆.

B.选修42:(矩阵与变换)

设M=ab

cd,则ab

cd1

1=31

1=3

3,故a+b=3,

c+d=3.

ab

cd-1

2=9

15,故-a+2b=9,

-c+2d=15.

联立以上两方程组解得a=-1,b=4,c=-3,d=6,故M=-14

-36.

C.选修44:(坐标系与参数方程)

解:将方程ρ=22sin(θ-π4),x=1+45t

y=-1-35t分别化为普通方程:

x2+y2+2x-2y=0,3x+4y+1=0,

由曲线C的圆心为C(-1,1),半径为2,所以圆心C到直线l的距离为25,

故所求弦长为22-(25)2=2465.

D.选修45(不等式选讲)

解:由柯西不等式可知:(x+y+z)2≤[(2x)2+(3y)2+z2]·[(12)2+(13)2+12]

故2x2+3y2+z2≥2411,当且仅当2x12=3y13=z1,即:x=611,y=411,z=1211时,

2x2+3y2+z2取得最小值为2411.

22.解:(1)由题设知,X可能的取值为:3,4,5,6,7.

随机变量X的概率分布为

X34567

P1616131616

因此X的数学期望E(X)=(3+4+6+7)×16+5×13=5.

(2)记“一次操作所计分数X不大于E(X)”的事件记为C,则

P(C)=P(“X=3”或“X=4”或“X=5”)=16+16+13=23.

设四次操作中事件C发生次数为Y,则Y~B(4,23),

则所求事件的概率为P(Y≥2)=1-C14×23×(13)3-C04×(13)4=89.

23.解:(1)P(3)=6,P(4)=18,P(5)=30.

(2)设不同的染色法有pn种.易知.

当n≥4时,首先,对于边a1,有3种不同的染法,由于边a2的颜色与边a1的颜色不同,所以,对边a2有2种不同的染法,类似地,对边a3,…,边an-1均有2种染法.对于边an,用与边an-1不同的2种颜色染色,但是,这样也包括了它与边a1颜色相同的情况,而边a1与边an颜色相同的不同染色方法数就是凸n-1边形的不同染色方法数的种数pn-1,于是可得

pn=3×2n-1-pn-1,pn-2n=-(pn-1-2n-1).

于是pn-2n=(-1)n-3(p3-23)=(-1)n-2·2,

pn=2n+(-1)n·2,n≥3.

篇5:二年级数学期末测试卷试卷分析

本学期期末测试已经结束,为了更好地对今后的工作又一个促进作用,现将测试卷中存在的不足,建议以及发现的问题总结如下:

一、基本情况

从整体上看,本次试题内容较为简单,试题注重基础知识掌握应用,内容涵盖广泛,两位数的加减、乘法的初步认识及表内乘法口诀、钟表上的时间、几何图形等知识点都有考查,尤以计算为主,能力上考查了学生的计算、理解、观察、操作等能力。突出了学科特点,体现了《数学课程标准》精神。

学生基础知识和基本技能水平的高低,关系到今后各方面能力水平的发展。本次试题以基础知识为主,既注意全面更注意突出重点,对主干知识的考查又保证了较高的比例。本册重点内容—100以内的加减法和表内乘法,在试卷中通过口算、笔算、比较大小、解决问题等。

第一题、认真算一算,学生解决的正确率在95%以上,有个别同学粗心,把8乘7减8算错了得数,竖式有5人出错,68+25算成了95或83.第二题用心填一填,第1小题,正确率100%。第三小题有个别同学填成7厘米或5厘米。第4小题填空,足球比赛填时间,错误率比较严重。第5小题做的情况良好。第6小题填时刻,第二个错的比较多,写成了1:55.第三大题,仔细选一选,2、3小题有错误,不细心出错。

第四大题,1小题连线,出错的情况较少,只有个别学生出错。正确率可大95%,“刚刚”和“亮亮”连相反了,学生没有站在人物的位置上好好观察、观察能力较差。2小题,错误更是极个别学生,学生没有好好观察,没有好好去数一数,前面数错后面涂色自然出错。

解决问题;

1、个别学生出错,有得数算错的,也有列式错的,学生没有观察分析好图中的信息。

2、有个别单位写错了,还有学生不细心。3小题错误较多,很多学生没有看懂题意,列式得数全错。第4小题基本全对,个别学生出错主要是单位没有。

二、主要特点。本次测试学生表现出的主要特点是学生对观察性的实践题和计算以及单位有些模糊,不能完全理解。还有就是学生出现不认真的情况。运用数学知识解决问题的能力较强。有良好的书写习惯。本次试卷中,除了极个别学生外,绝大多数学生做到了书写工整,卷面整洁。

3、存在的问题;从部分题来看,教师关注少的方面,失分还是比较严重的。主要体现在:(1)对计算抓的还是不够,出现不同程度的丢分,可能是到复习后期,重点放在了对知识的灵活应用上,对概念的理解和操作上,在计算上只强调方法,没有天天坚持检查。(2)解决问题里学生的理解能力还是欠缺,虽然也讲解了许多类型的题目,但是学生的分析能力和举一反三能力还是有问题。反思失分原因,学生可能平时接触一步计算的题目较多,有了思维定势,又缺乏细心和耐心导致丢分。在今后的教学中,要注意从这几方面加以改进。加强学生读题理解能力。从考试的整体状况来看,我们在平时的教学中还要注重学生的审题能力、理解能力。在平时的训练中有意识的变换各种题型,让学生会融会贯通。避免学的比较死。进一步加强学生专心致志,细心检查等良好的学习习惯的培养。关注后进生的状况。反思学生中弱势群体的学习方式,思维方式,做好家校联系,教师应多从答题错误中深层次反思形式得到了广泛的考查。

四、今后建议

1、继续加强基础知识的考察。

2、贴近生活实际,体现应用价值。“人人学有价值的数学,”这是新课标的一个基本理念。本次试题依据新课标的要求,从学生熟悉的生活索取题材,把枯燥的知识生活化、情景化,通过解决问题的形式让学生从中体验、感受学习数学知识的必要性、实用性和应用价值。

(3)重视各种能力的考查。本次试题通过不同的数学知识载体,全面考查了学生的计算能力,操作能力、观察能力和判断能力以及运用知识解决生活问题的能力。

篇6:高三高考全真模拟试卷二语文试卷

近年来,精准扶贫战略实施后,慕名来找他的人越来越多,保国帮扶的地方也越来越多,常常开车奔走于各地,帮扶基地的家我们住得少了,在车上的日子越来越多了,一年行程约 4万公里。他开车,我坐在旁边,替他接打电话,安排工作,联系事情。有时看他累了,陪他聊聊天,喝水、吃药、中午 休息,都是在车里。一些常用物品,雨鞋、草帽、衣服、工具包等,把后备箱塞得满满的,车成了我们流动的家。

比较起来,在保定市里的那个家待得最短。20xx 年春节前,我俩回到保定的时候是腊月二十九, 想准备准备年货,第二天过个年三十儿。可是我俩忙得都不知道,今年没有年三十儿,看着家里冰锅冷灶啥也没有,我心里一阵难受。最后,还是我们亲家打来电话,让我们去他们那里过了个除夕。我想初一总不能还在人家过吧,就张罗着去买点肉馅想包顿饺子,可是附近卖菜卖肉的摊贩早就都回家过年去了。

三十多年来,我们在三个“家”之间来回奔波,结婚这么多年,保国因为太忙,常常顾不上家里的事。我前后两次做手术,他都不在身边,连手术签字都是同事代签的。去年在“燕赵楷模”发布厅录制现场,他对主持人说,这辈子最愧对的就是老婆和孩子!

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