重庆南开中学七年级下期期末考试
重庆市南开中学2014-2015年七年级下期末数学试卷含答案解析

五、解答题:本大题共 4 小题,第 29 题 6 分,第 30 题 6 分,弟弟 31 题 8 分,32 题 10 分,共 30 分.解答时每小题必须给出必要的演算过程或推理步骤. 29.已知:如图,在△ABC 中,∠ABC=∠ACB,AD⊥BD,AE⊥CE,且 AD=AE.求证: △AEC≌△ADB.
A.AB=DE B.∠B=∠E C.EF=BC D.EF∥BC 10.将一个四边形纸片依次按图示①、②的方式对折,然后沿图③中的虚线裁剪成④样式.将 纸片展开铺平,所得到的图形是图中的( )
A.
B.
C.
D.
第 2 页(共 32 页)
三、计算题:本大题共 5 个小题,第 23-26 每小题 4 分,第 27 小题 5 分,共 21 分.
第 5 页(共 32 页)
A.35° B.53° C.63° D.43° 4.下列事件为必然事件的是( ) A.任意买一张电影票,座位号是偶数 B.打开电视机,CCTV 第一套节目正在播放天气预报 C.从一个之装有红色小球的把它们袋中,任意摸出一球是红球 D.经过某一有交通信号灯的路口,恰好遇到红灯 5.如图,下列条件中,一定能判断 AB∥CD 的是( )
23.( )﹣1+(3.14﹣π)0+
﹣|﹣5|.
24.a•a2•a3+(a3)2﹣(2a2)3.
25. ÷ ﹣ × + .
26.( ﹣ )2﹣( ﹣2 )(2 + )
27.先化简,再求值:[(m+n)(2m﹣n)﹣2m(m﹣n)]÷( n),其中 m 是 的倒数,n 是 9 的算 术平方根.
四、尺规作图:5 分. 28.如图,南开中学高二年级的学生分别在五云山寨 M,N 两处参加社会时间活动.先要在道路 AB,AC 形成的锐角∠BAC 内设一个休息区 P,使 P 到两条道路的距离相等,并且使得 PM=PN, 请用直尺和圆规作出 P 点的位置(不写作法,值保留作图痕迹).
重庆市南开中学2012-2013学年七年级下学期期末考试语文试题(无答案)

重庆南开中学2012—2013学年七年级下学期初2015级期末语文试题亲爱的同学:通过这学期的辛勤耕耘,你一定有许多收获吧!希望你细心读题、深入思考、认真回答,尽情采摘成功的果实!一、语文基础知识与运用(20分)1.下列词语中加点字注音无误..的一项是( )(2分)A.蓦(mò)然阴霾(mái) 羁绊(bàn) 叱咤风云(chà)B.躯壳(qiào) 甜腻(nì) 告罄(qìn) 孜孜不倦(zī)C.犷野(guǎg) 逞(chěng)能庇荫(yīn) 慷慨(kǎi)以赴D.惩(chéng)戒吞噬(shì) 剽(piāo)悍秩(zhì)序井然2.下列词语中加点字书写无误..的一项是( )(2分)A.真谛蜷伏尽态极妍迫不及待略胜一筹B.赢弱筛糠妄下断语养精蓄锐相得益彰C.怂勇道劲芸芸众生眼花嘹乱姗姗来迟D.阔绰娴熟疲惫不堪进退唯谷鲁莽大胆3.下列加点的成语使用有误的一项是( )(2分)A.他语无伦次....地向周围的人诉说自己的不幸遭遇。
B.“神舟十号”宇航员王亚平在“天宫一号”上通过视频耀武扬威....地给大家进行太空教学。
C.今年4月20日在四川省雅安市芦山县发生了7.0级地震,有的乡镇成了一片废墟,道路塌方,物质匮乏,人们忧心忡忡....。
D.“神舟十号”飞船和火箭垂直总装厂房雄伟壮观,单是那74米高、350多吨重的升降推拉钢大门,就令人叹为观止....。
4.下面语段画线处都有语病,请根据提示加以改正。
(共2分,每题0.5分。
) 如今,除了“舌尖上的端午节”,①折纸葫芦、赛龙舟、挂菖蒲等习惯,还有多少被保留?记者随机采访,5岁的杭州男孩李翰脱口而出“我不喜欢吃粽子”;12岁的河南姑娘王悠悠形容“端午的一天”为“压力和粽子”,因为这一天,她依然要上补习班。
8岁的上海男孩沈豫章,②偶遇了一场锣鼓喧天的苏州河上龙舟赛,他握起小拳头为选手们加油助威,才明白“端午节不只是吃粽子。
重庆南开中学度期末考试七年级下数学试题

小学教育
注意:请把选择题的答案填在上表中,否则不给分.
1.下列图形中,是轴对称图形的是()
8.下列各式中,不能运用平方差公式计算的是 ( )
A .(2)(2)a a -+
B .()()b c b c --+
”的样子,请你判断这个英文单词是.
15.一只蚂蚁的重量约为0.0002145千克,把0.0002145保留两个有效数字,用科学记数法表示
为__________________.
16.如图,一个正三角形的靶子,靶心为其三条对称轴的交点,飞镖随机地掷在靶上,则投到区
域A 的概率是____________.
25. 如图,BO、CO分别平分∠ABC、∠ACD,过O作OM//BC
分别交AB、AC于M、N.则下列结论:①MO=MB;
②OB平分∠MOC;③MN=NO;④MN=BM-CN.
其中正确的结论有_____________.(只填序号)
25题图
A
B C D
M N O
28.(5分)为了鼓励小强勤做家务,培养劳动意识,小强每月的总费用等于基本生活费加上奖
励(奖励由上个月他的家务劳动时间确定).小强每月的家务劳动时间与下月他可获得的总费用之间的关系如图所示.
5
6
6。
2014-2015学年重庆市南开中学七年级(下)期末英语试卷

2014-2015学年重庆市南开中学七年级(下)期末英语试卷I.听力测试.(共15分)第一节、情景反应.(每小题1分,共4分)根据你所听到的句子,从A、B、C三个选项中选出最恰当的答语,并把答题卡上对应题目的答案标号涂黑,听一遍.1.(1分)A.About five kilometers.B.About five minutes.C.On foot.2.(1分)A.She is tall.B.She likes reading.C.She is kind.3.(1分)A.Sounds great.B.I'm sorry to hear that.C.Sure.4.(1分)A.No,you can't.B.Clark speaking.C.Who are you?第二节、对话理解.(每小题1分,共4分)根据你所听到的对话及问题,从A、B、C三个选项中选出最恰当的答语,并把答题卡上对应题目的答案标号涂黑,听一遍.5.(1分)A.Not to eat in the shop.B.Not to eat in the restaurant.C.Not to eat in the library.6.(1分)A.Doing homework.B.Watching TV.C.Playing basketball.7.(1分)A.On Bridge Street.B.On Long Street.C.Across from Bridge Street.8.(1分)A.By plane.B.By bus.C.By train.第三节、长对话理解.(每小题3分,共3分)9.(3分)根据你所听到的长对话,完成9到11三个小题.从A、B、C三个选项中选出正确答案,并把答题卡上对应题目的答案标号涂黑,听两遍.9.How's the weather today?A.It's rainy.B.It's sunny.C.It's windy.10.What sports do they play?A.Volleyball.B.Baseball.C.Basketball.11.Why can't Jack wear glasses when he does sports?A.Because he can't play baseball.B.Because he can't see Kate.C.Because it's dangerous.第四节、短文理解.(每小题4分,共4分)12.(4分)根据短文内容,完成12到15四个小题.请从A、B、C三个选项中选出正确答案,并把答题卡上对应题目的答案标号涂黑,听两遍.12.Tom has.A.a sisterB.a brotherC.a sister and a brother13.Lucy has hair.A.long curly blondB.short straight blackC.long straight blond14.Jim had a small bowl of.A.dumplings with cabbageB.noodles with beefC.noodles with cabbage15.had a great time last evening.A.Lucy and JimB.Lucy and TomC.Lucy,Jim and Tom.II.单项选择.(每小题1分,共15分)请根据句意和语法,从A、B、C、D中选出最佳答案,并把机读卡上对应题目的答案标号涂黑.16.(1分)Eric is going to Nanjing by __________ train.()A.the B.a C.an D./17.(1分)Come on,children.Have some __________ if you like.()A.fishes and chicken B.potato and soupC.fish and juice D.tomatoes and chickens18.(1分)﹣Why are you standing,Alice?﹣﹣I can't see the blackboard.The two tall boys are __________ me.()A.across from B.next to C.behind D.in front of19.(1分)﹣﹣Would you like __________ Jane,my aunt?﹣﹣Oh,nice to meet you,Jane.Would you like __________ juice?()A.meeting;some B.to meet;someC.meet;any D.to meet;any20.(1分)﹣Where is Jack?He __________ here just now.﹣﹣Jack?Now he __________ volleyball on the playground.()A.was;plays B.is;playedC.was;is playing D.is;is playing21.(1分)﹣Why is she so __________?﹣﹣You don't know?TF﹣boys are coming!Come!()A.exciting B.relaxing C.excited D.relaxed22.(1分)We went to UME yesterday.The movie was __________ good __________ we all want to see it again.()A.too,that B.so,to C.so,that D.very,that23.(1分)﹣Does Miss Wang have long or short hair?﹣﹣__________.()A.Long hair B.Yes,she has long hairC.No,she doesn't D.She is tall24.(1分)I am looking for a birthday gift for my mother.But I didn't find __________ good in the market.Thisis not good,either.Can you show me __________ one?()A.anything;another B.something;anotherC.something;the other D.anything;other25.(1分)﹣Who went to the mountains with you?﹣﹣Jerry __________.()A.does B.did C.do D.went26.(1分)﹣Hey,Mary.How's it going?﹣﹣__________.We are having a great time in the museum.()A.Terrible B.GreatC.It's a good idea D.No problem27.(1分)It's 7o'clock,the kids are still sleeping.__________!()A.Wake them up B.Put them on C.Put on them D.Wake up them28.(1分)﹣May I take your order,sir?﹣﹣__________.()A.I have no moneyB.No,go awayC.Yes,I'd like some noodlesD.You're welcome29.(1分)__________ a book in the bookstore,you need to ask for help.()A.To find B.Find C.Finding D.Finds30.(1分)I need to talk to her.Please tell me __________.()A.where does she live B.she lives whereC.where she lives D.where is sheIII.完形填空.(每小题10分,共10分请根据短文内容和语法,从A、B、C、D 中选出最佳答案,并把答题卡上对应题目的答案标号涂黑.31.(10分)Walter was always making excuses(借口)for forgetting to do things.His usual excuse was"I was too busy"or"I didn't have time".Walter's (31)were worried about him."If he makes excuses all the time,nobody will (32)him.He won't get a job."said his father."I don't know (33)we can do,"said his mother."I have a good idea,"his father said."If this doesn't (34),nothing will." The next day was Walter's birthday.When he thought of (35)birthday gifts,he couldn't wait.He woke up expecting(期待)his paents to wish him"Happy birthday!"But they just said"Good morning,Walther.Get up now.If you don't,you will be (36)for school."There were no gifts,not even a card.He was very (37)."Never mind,"he thought."Maybe they will give me a surprise(惊喜)(38)school when I get home."But they didn't.At last,at dinner he said to his parents,"Today is my birthday.""Oh!"his father said."So it is.I forgot it.""So did I,"his mother said."How could you forget?"Walter asked."There must be a reason.""Well.Yes."His father said."We have a really good excuse for forgetting your birthday,Walter.We didn't remember your birthday only (39)we were too busy."Poor Walther!But he (40)had an excuse for not doing something again after that!31.A.parents B.friends C.classmates D.teachers 32.A.forget B.remember C.like D.call33.A.why B.where C.when D.what34.A.work B.have C.meet D.want 35.A.sending B.buying C.getting D.giving 36.A.interested B.good C.early D.late37.A.sad B.happy C.tired D.careful38.A.after B.before C.in D.at39.A.so B.if C.because D.and40.A.often B.never C.sometimes D.always.IV.阅读理解.(每小题1.5分,共15分)请阅读下列材料,并根据文章内容从A、B、C、D四个选项中选出最佳答案,并把答题卡上对应题目的答案标号涂黑.41.(4.5分)41.We can find kinds of animals in the passage.A.fiveB.sixC.sevenD.eight42.Mr.Black wants to take his 3﹣year﹣old son to the zoo.He must pay.A.¥30B.¥20C.¥10D.¥4043.From the passage we know we can.A.touch the monkeysB.give food to the animalsC.go to the zoo at 4:30p.m.on SundaysD.go near to the animals.44.(4.5分)An old man died and left his son a lot of money.But the son was a foolish young man,and he quickly spent all the money,so that he had nothing left.Of course,when that happened,all his friends left him.When he was very poor and alone,he went to see Robin,who was a kind,clever old man and often helped people when they had troubles."My money has been spent freely and many friends have gone,"said the young man."What will happen to me?""Don't worry,young man,"answered Robin."Everything will soon be all right again.Wait,and you will soon feel much happier."The young man was very happy."Am I going to get rich again then?"he asked Robin."No,I didn't mean that,"saidthe old man."I meant that you would soon get used to(习惯于)being poor and having no friends."44.When the young man was,he went to see Robin.A.very rich and happyB.very poor and sickC.ery sick and aloneD.very poor and alone45.The young man was very happy because Robin said that he would.A.become rich againB.soon feel much happierC.become cleverD.have more friends46.Robin meant the young man would.A.get rich againB.get used to having no friends or moneyC.leave his son a lotof moneyD.have more friends.47.(6分)If you want to be a better reader,what should you know about the speed (速度)of reading?Some people read very quickly,while others read very slowly.But which one is better?The quick reader may be a good reader when he reads a story﹣book for fun.But e may not be able to slow down to read instructions (说明书)carefully.The slow reader may be a good reader.But he may spend too much time reading a story for fun.So the reader who reads everything quickly or the one who reads everything slowly isn't really a good reader.Here are four things to remember about the speed of reading.Knowing why you are reading will help you to know whether(是否)to read quickly or slowly.Some things should be read slowly throughout.Examples(例子)are instructions for making or doing something.Math books,scienc and story﹣books are full ofimportant information.You must rea these things slowly to understand and remember everything important.Some things should be read quickly throughout.Examples are stories for enjoyment,letters from friends,and some news from newspapers.In some of your reading,you must change your speed from fast to slow and slow to fast.You will need to read some pages quickly and then slow down and do more careful reading when you come to important ideas.47.The underlined word throughout means.A.开始B.结束C.始终D.穿过48.You should read slowly when you read.A.letters from friendsB.news from newspapersC.picture﹣books for funD.important information from story﹣books49.Which of the following is TRUE?A.Reading everything quickly is a good reader.B.A slow reader isn't a good reader.C.Sometimes you must change our speed when you read.D.You must always change your speed from fast to slow.50.Which one is the best title(标题)?A.How to Be a Good Reader.B.How to Read Quickly.C.Reading Slowly Is Better.D.Reading Is a Good Hobby.V.任务型阅读.(每题1分,共3分)阅读下列材料,根据文章意思回答以下问题.51.(3分)Twenty﹣two years ago,Steven Spielberg brought dinosaurs(恐龙)back in the movie"Jurassic Park《侏罗幻公园》".A few weeks ago,"Jurassic World"came back again.This time,the island is just like a Disney theme park but it is lack of visitors.So the park's owners want to make a hybrid(杂交的)dinosaur.When this new dinosaur gets out of the park,everyone becomes afraid.People love this kind of story.So it is popular across the world.But"Jurassic World"also has a lot of problems.The director didn't show many new things to people.He just wanted to make people scared by those dinosaurs and tell them to respect nature.We could find that from Owen Grady.He is a Velociraptor (迅猛龙)expert in the movie.In his opinion,scientists should make friends with dinosaurs.But these sound a little boring.At the end of the film,we may have some questions,too.Will the geneticists(基因学家)create more hybrid dinosaurs and will they use these big animals to start a war?51.Is"Jurassic World"popular in the world?.52.When did Spielberg bring dinosaurs back in"Jurassic Park"?.53.What should scientists do in Owen Grady's opinion?.VI.补全对话.(每小题5分,共5分)请你从A-G中选出5个句子来完成对话.其中有2个多余的选项.54.(5分)A:Hi,Cindy.(54)B:Hello,Laura.It was great.A:Really?What did you do?B:Well,(55)The seawater was really blue.A:(56)B:Yes,there were.A:Did you play volleyball on the beach?B:(57)A:(58)B:My parents,sisters and brothers.A:Oh,that's great.A.How'sitgoing?B.Howwasyoursummervacation?C.Weretheeanybeaches?D.Yes,IoftenplayedvolleyballafterdinnerE.Ijustswaminthesea.F.Didyoubuyanygifts?G.Whodidyouplaywith?VII.根据首字母及句意填空,使句子语法正确,意思通顺.(每空1分,共6分)59.(1分)The old man enjoys t photos on his vacation around the world.60.(1分)They are from different c,some from Canada,some the USA,some China.61.(1分)I speak English so I can understand you very e.Don't worry.62.(1分)﹣May I speak to Tina?﹣﹣Sorry,she isn't in.Can I take a m?63.(1分)﹣How can I get to the park?﹣﹣Just go a the street and turn right.64.(1分)There are q a lot of books in his room.So he must love reading.VIII.用括号内所给词的正确形式填空,使句子语法正确,意思通顺.(每空1分,共8分)65.(1分)It's summer in Chongqing.And it is always(sun )and veryhot.66.(1分)Are you(study )hard?Are you ready for the test?67.(1分)There(be )a little milk and some apples.We don't have to shop today.68.(1分)Hey,Peter!Jack called you this morning.Just call(he )back when you have time.69.(1分)My uncle lost his bag yesterday.(luck ),a boy found it and gave it back to him thismorning.70.(1分)Last weekend,Bob did his homework and(see )a movie with his father.71.(1分)Can you just tell him(come )back early?72.(1分)My family and I(be )in Chengdu last year.IX.句型转换及翻译.请根据要求,在每个空白处填写一个单词来完成句子.缩写算一个单词.(每空0.5分,共10分)73.(1分)He is tall and handsome.(对划线部分提问)he look like?74.(1分)There is some beef in my fridge.(变一般疑问句并给出否定回答)Is there beef in your fridge?No,isn't.75.(1分)He did his work last week.(改为否定句)He his work last week.76.(1分)It is hot and dry in Beijing.(对划线部分提问)is the in Beijing?77.(1分)Did you grow apples?(给出肯定回答)Yes,I.I some apples here.78.(1分)I'd like beef and tomato noodles.(对划线部分提问)What of noodles you like?79.(1分)I was in in the supermarket yesterday afternoon.(对划线部分提问)you yesterday afternoon?80.(1分)She put up her hand and answered the question.(对划线部分提问)What she?81.(1分)She spent two hours doing her homework.(同义句)It two hours to do her homework.82.(1分)我们每个人都有一个梦想.(汉译英)of us a dream of our own.X.原谅填空.(每空一词,每空0.5分,共4分)83.(2分)Waitress:Good afternoon.May I take your order?Sally:Yes.Are thee any (83)in the beef soup?Waitress:Yes.There are some tomatoes.Sally:OK.We'd like one bowl of beef soup.Waitress:Sure.What (84)would you like?Sally:Large,please.Tom:We'd (85)like gongbao chicken and some mapo tofu with rice.Waitress:OK.One large bowl of beef soup,one gongbao chicken,and one mapo tofu with rice.Tom:Yes,that's (86).87.(2分)He wants to draw a good picture of each criminal,but this job is sometimes (87).Many people don't always see things the same (88)so they may describe the same person differently.Also,they don't always (89)well."The criminal is of medium height and young.He has long straight brown hair and big eyes,"says one woman.Another woman says,"He is tall and thin,and he has curly blond hair.He's about thirty years old."In the (90),the real criminal is a short and heavy old man,and he has short black hair!XI.短文填空.(每空1.5分,共9分)请根据短文内容和语法,在每个空白处填上一个恰当的词,使短文完通畅.91.(9分)My father is always busy.And he has (91)time to see a film.Here I'll tell you a funny story about him.One afternoon,wen he finished his work and was going home,he found a movie ticket under the book on his desk.He thought he happened to have not much work to do that day and it was very wonderful to spend the evening (92) a movie.So he came back home and quickly finished his supper.Then he said goodbye to us and left.But to our (93),he came back about half an hour later.I asked him what was the matter.He smiled and told us about a funny thing that had happened at the cinema.When my father was sitting in his seat,a woman came to my father's seat and said that the seat was (94).My father was surprised.He took out the ticket and looked at it carefully.It was Row 17,Seat 3.And then he looked at the seat.It was the same.So he asked her to show her ticket.She took out the ticket right away and the seat shown in it was Row 17,Seat 3,(95).What's the matter with all this?While they were wondering,suddenly the woman said,"The date(日期)of the tickets are (96)."So they looked at the ticket more carefully.After a while,my father said,"Oh,I am sorry,I made a mistake.My ticket is for the film a month ago.Take this seat,please."With these words,he left the cinema.2014-2015学年重庆市南开中学七年级(下)期末英语试卷参考答案与试题解析I.听力测试.(共15分)第一节、情景反应.(每小题1分,共4分)根据你所听到的句子,从A、B、C三个选项中选出最恰当的答语,并把答题卡上对应题目的答案标号涂黑,听一遍.1.(1分)A.About five kilometers.B.About five minutes.C.On foot.【解答】B2.(1分)A.She is tall.B.She likes reading.C.She is kind.【解答】A3.(1分)A.Sounds great.B.I'm sorry to hear that.C.Sure.【解答】B4.(1分)A.No,you can't.B.Clark speaking.C.Who are you?【解答】B第二节、对话理解.(每小题1分,共4分)根据你所听到的对话及问题,从A、B、C三个选项中选出最恰当的答语,并把答题卡上对应题目的答案标号涂黑,听一遍.5.(1分)A.Not to eat in the shop.B.Not to eat in the restaurant.C.Not to eat in the library.【解答】C6.(1分)A.Doing homework.B.Watching TV.C.Playing basketball.【解答】B7.(1分)A.On Bridge Street.B.On Long Street.C.Across from Bridge Street.【解答】A8.(1分)A.By plane.B.By bus.C.By train.【解答】A第三节、长对话理解.(每小题3分,共3分)9.(3分)根据你所听到的长对话,完成9到11三个小题.从A、B、C三个选项中选出正确答案,并把答题卡上对应题目的答案标号涂黑,听两遍.9.How's the weather today?A.It's rainy.B.It's sunny.C.It's windy.10.What sports do they play?A.Volleyball.B.Baseball.C.Basketball.11.Why can't Jack wear glasses when he does sports?A.Because he can't play baseball.B.Because he can't see Kate.C.Because it's dangerous.【解答】BAC第四节、短文理解.(每小题4分,共4分)12.(4分)根据短文内容,完成12到15四个小题.请从A、B、C三个选项中选出正确答案,并把答题卡上对应题目的答案标号涂黑,听两遍.12.Tom has C.A.a sisterB.a brotherC.a sister and a brother13.Lucy has A hair.A.long curly blondB.short straight blackC.long straight blond14.Jim had a small bowl of A.A.dumplings with cabbageB.noodles with beefC.noodles with cabbage15.C had a great time last evening.A.Lucy and JimB.Lucy and TomC.Lucy,Jim and Tom.【解答】CAACII.单项选择.(每小题1分,共15分)请根据句意和语法,从A、B、C、D中选出最佳答案,并把机读卡上对应题目的答案标号涂黑.16.(1分)Eric is going to Nanjing by __________ train.()A.the B.a C.an D./【解答】正确答案:D.句意是"艾瑞克打算坐火车去南京.",其中by train表示坐火车,故选择D.17.(1分)Come on,children.Have some __________ if you like.()A.fishes and chicken B.potato and soupC.fish and juice D.tomatoes and chickens【解答】答案:C;fish 作鱼肉讲是不可数名词,chicken作鸡肉讲也为不可数名词;some 修饰可数名词复数形式和可数名词原形,potato要填其复数形式potatoes,一些鱼或者一些鸡肉要填fish或者chicken,故选C.18.(1分)﹣Why are you standing,Alice?﹣﹣I can't see the blackboard.The two tall boys are __________ me.()A.across from B.next to C.behind D.in front of【解答】答案:D,考察介词短语辨析.Alice看不见黑板,原因是两个高个子的男生在她前面,A在…对面,B挨着,C后边,D前面,根据句意可知选择D.19.(1分)﹣﹣Would you like __________ Jane,my aunt?﹣﹣Oh,nice to meet you,Jane.Would you like __________ juice?()A.meeting;some B.to meet;someC.meet;any D.to meet;any【解答】答案:B 本题考查短语would like想要,的意义和用法:可以接动词不定式,句型为would like to do sth./would like sb.to do sth.想要(某人)做某事;可以接名词,句型为would like sth.想要某物.some一些,常用于肯定句,any一些,常用于否定句和疑问句,但如果希望得到对方肯定的回答,some也可用于一般疑问句,故答案为B.20.(1分)﹣Where is Jack?He __________ here just now.﹣﹣Jack?Now he __________ volleyball on the playground.()A.was;plays B.is;playedC.was;is playing D.is;is playing【解答】答案:C.对于第一个空,根据just now"刚才"可知,本句应用一般过去时;对于第二个空,根据Where is Jack和now可知,本句应用现在进行时.故选C.21.(1分)﹣Why is she so __________?﹣﹣You don't know?TF﹣boys are coming!Come!()A.exciting B.relaxing C.excited D.relaxed【解答】答案:C 考查ing形容词和ed形容词用固定用法,ing的形容词修饰物,ed的形容词修饰人.本句主语是she,故排除A、B.excited意为兴奋的,relaxed 意为放松的,根据句意TF﹣boys 要来了应该是兴奋地,故选择C.22.(1分)We went to UME yesterday.The movie was __________ good __________ we all want to see it again.()A.too,that B.so,to C.so,that D.very,that【解答】答案:C 考查连词词义辨析.so…that意为如此…以至于,没有A、B、D的搭配,故选择C.23.(1分)﹣Does Miss Wang have long or short hair?﹣﹣__________.()A.Long hair B.Yes,she has long hairC.No,she doesn't D.She is tall【解答】答案:AA 长发;B 是的,她有长头发;C 不,她不是;D 她很高.根据"Does Miss Wang have long or short hair?王女士是长发还是短发?"可知,只有A符合语境,故答案为A24.(1分)I am looking for a birthday gift for my mother.But I didn't find __________ good in the market.Thisis not good,either.Can you show me __________ one?()A.anything;another B.something;anotherC.something;the other D.anything;other【解答】答案:A.something意思是"某事,某物"经常用在肯定句中;anything意思是"任何事物"经常用在否定句和疑问句中,指代某个不确定的东西.如果有形容词修饰不定代词的时候,形容词要放在不定代词的后面.another意思是"(在原来的基础上)又一,再一";other意思是"别的,其他的";the other意思是"(特指两者中的)另一个";根据"I didn't find _____ good in the market"我在市场里找不到任何好东西,这是一个否定句,在否定句中要用anything,又因为"This is not good,either"这个也不好,所以就要求再拿一个看看,所以要用another,综上所述,故选A.25.(1分)﹣Who went to the mountains with you?﹣﹣Jerry __________.()A.does B.did C.do D.went【解答】答案:B 考查助动词.根据句中的went可知时态是一般过去时,句中谓语动词是行为动词,在省略句中需用do的过去式did,故选择B.26.(1分)﹣Hey,Mary.How's it going?﹣﹣__________.We are having a great time in the museum.()A.Terrible B.GreatC.It's a good idea D.No problem【解答】答案:B根据"We are having a great time in the museum"可知,她最近很好.A 糟透了;B 很好;C 好主意;D 没问题.只有B符合语境,故答案为B27.(1分)It's 7o'clock,the kids are still sleeping.__________!()A.Wake them up B.Put them on C.Put on them D.Wake up them【解答】答案:A 根据前文It's 7o'clock,the kids are still sleeping已经7点钟了,孩子们还在睡觉,结合选项,推测应该是叫醒他们.而them他们,是代词,只能放在wake up的中间,即wake them up叫醒他们,故答案为A.B穿上他们.28.(1分)﹣May I take your order,sir?﹣﹣__________.()A.I have no moneyB.No,go awayC.Yes,I'd like some noodlesD.You're welcome【解答】答案:CA 我没有钱;B 不,走吧;C 好的,我想要面条;D 不客气.根据"May I take your order,sir?"可知,只有C符合语境,故答案为C29.(1分)__________ a book in the bookstore,you need to ask for help.()A.To find B.Find C.Finding D.Finds【解答】答案:A 根据题意,此题考查动词不定式作目的状语:表示为了.常见的还有only to仅仅为了;in order to;so as to等.故答案为A.30.(1分)I need to talk to her.Please tell me __________.()A.where does she live B.she lives whereC.where she lives D.where is she【解答】答案:C.根据本句放在Please tell me 之后,可知本句是一个宾语从句.在宾语从句中所使用的语序应该是陈述句语序,AD是疑问句语序,B的特殊疑问词应放开头,故排除ABD.故选C.III.完形填空.(每小题10分,共10分请根据短文内容和语法,从A、B、C、D 中选出最佳答案,并把答题卡上对应题目的答案标号涂黑.31.(10分)Walter was always making excuses(借口)for forgetting to do things.His usual excuse was"I was too busy"or"I didn't have time".Walter's (31)A were worried about him."If he makes excuses all the time,nobody will (32)C him.He won't get a job."said his father."I don't know (33)D we can do,"said his mother."I have a good idea,"his father said."If this doesn't (34)A,nothing will." The next day was Walter's birthday.When he thought of (35)C birthday gifts,he couldn't wait.He woke up expecting(期待)his paents to wish him"Happy birthday!"But they just said"Good morning,Walther.Get up now.If you don't,you will be (36)D for school."There were no gifts,not even a card.He was very (37)A."Never mind,"he thought."Maybe they will give me a surprise(惊喜)(38)A school when I get home."But they didn't.At last,at dinner he said to his parents,"Today is my birthday.""Oh!"his father said."So it is.I forgot it.""So did I,"his mother said."How could you forget?"Walter asked."There must be a reason.""Well.Yes."His father said."We have a really good excuse for forgetting your birthday,Walter.We didn't remember your birthday only (39)C we were too busy."Poor Walther!But he (40)B had an excuse for not doing something again after that!31.A.parents B.friends C.classmates D.teachers 32.A.forget B.remember C.like D.call33.A.why B.where C.when D.what34.A.work B.have C.meet D.want35.A.sending B.buying C.getting D.giving 36.A.interested B.good C.early D.late37.A.sad B.happy C.tired D.careful38.A.after B.before C.in D.at39.A.so B.if C.because D.and40.A.often B.never C.sometimes D.always.【解答】31 A 考查名词:根据下文He won't get a job."said his father他爸爸说,他将找不到一份工作,said his mother他妈妈说,结合选项,推测意思是他父母亲很担心他,故选A父母.B朋友,C同学,D老师32 C 考查动词If he makes excuses all the time如果他总是找借口,结合选项,推测意思是没有人会喜欢他,故选C喜欢.A忘记,B记得,D打电话33 D 考查关系词:根据I don't know (33)we can do,结合选项,得知这里缺少一个充当do的宾语,即他妈妈说,我不知道我们能做什么,故选D什么.A 为什么,B哪里,C何时34 A 考查动词:根据后文nothing will什么也不起作用,根据if如果,遵循主将从现的用法,结合选项,推测意思是如果这不起作用的话,那么什么也不行,故选A起作用.B有,C遇见,D要35 C 考查动词:根据前文The next day was Walter's birthday第二天是沃尔特的生日.结合选项,推测意思是他考虑得到生日礼物,故选C得到.A寄送,B买,D给36 D 考查形容词:根据Get up now.If you don't,现在起床,如果你不起床,结合选项,推测意思是你上学将会迟到,联想到固定短语be late for,故选D迟到的.A感兴趣的,B好的,C早的37 A 考查形容词:根据前文There were no gifts,not even a card没有礼物,连卡片也没有.结合选项,推测他肯定是难过的,故选A难过的.B高兴的,C累的,D仔细的38 A 考查介词:根据when I get home当我回家时,结合选项,推测意思是放学回家,故选A之后.B之前,C在里面,D在39 C 考查连词:根据后文we were too busy."我们太忙了,这是父母忘记给Walter买生日礼物的原因,故选C因为.A因此,B如果,D和40 B 考查副词:根据上文意思,Walter的生日没有收到父母的礼物,很生气,就问父母原因,父母的回答是"我们太忙了",这正是Walter给自己忘记做事情所找的借口,结合选项,推测意思是经过这件事后,他再也没有为忘记做事情而找借口了,故选B从不.A经常,C有时,D总是IV.阅读理解.(每小题1.5分,共15分)请阅读下列材料,并根据文章内容从A、B、C、D四个选项中选出最佳答案,并把答题卡上对应题目的答案标号涂黑.41.(4.5分)41.We can find B kinds of animals in the passage.A.fiveB.sixC.sevenD.eight42.Mr.Black wants to take his 3﹣year﹣old son to the zoo.He must pay B.A.¥30B.¥20C.¥10D.¥4043.From the passage we know we can C.A.touch the monkeysB.give food to the animalsC.go to the zoo at 4:30p.m.on SundaysD.go near to the animals.【解答】41.B细节理解题,根据广告内容可知动物园有big elephants;tigers;The beautiful birds;the monkeys;koalas;The giraffes 六种动物,故选B.42.B细节理解题,根据Grown﹣ups:¥20From Monday to Friday Children:Over 12years old:¥10;9:00a.m.~4:00p.m.Under 12years old:Free;On Saturday and Sunday可知布莱克先生和3岁的儿子要付20元,故选B.43.C细节理解题,根据On Saturday and Sunday 8:00a.m.~5:30p.m.可知周日下午4:30去动物园,故选C.44.(4.5分)An old man died and left his son a lot of money.But the son was a foolish young man,and he quickly spent all the money,so that he had nothing left.Of course,when that happened,all his friends left him.When he was very poor and alone,he went to see Robin,who was a kind,clever old man and often helped people when they had troubles."My money has been spent freely and many friends have gone,"said the young man."What will happen to me?""Don't worry,young man,"answered Robin."Everything will soon be all right again.Wait,and you will soon feel much happier."The young man was very happy."Am I going to get rich again then?"he askedRobin."No,I didn't mean that,"saidthe old man."I meant that you would soon get used to (习惯于)being poor and having no friends."44.When the young man was D,he went to see Robin.A.very rich and happyB.very poor and sickC.ery sick and aloneD.very poor and alone45.The young man was very happy because Robin said that he would B.A.become rich againB.soon feel much happierC.become cleverD.have more friends46.Robin meant the young man would B.A.get rich againB.get used to having no friends or moneyC.leave his son a lotof moneyD.have more friends.【解答】44.D 细节理解题.根据When he was very poor and alone,he went to see Robin,可知当他又穷又孤单的时候,他去看John,故选D.45.B 细节理解题.根据"Everything will soon be all right again.Wait,and you will soon feel much happier."一切都会好起来的.只要等等,你会感到开心得多的."年轻人非常高兴.故选B.46.B 判断推理题.根据文中最后一句I meant that you would soon get used to(习惯于)being poor and having no friends."我的意思是说你会马上习惯贫穷和没有朋友.故选B,习惯一无所有.47.(6分)If you want to be a better reader,what should you know about the speed(速度)of reading?Some people read very quickly,while others read very slowly.But which one is better?The quick reader may be a good reader when he reads a story﹣book for fun.But e may not be able to slow down to read instructions (说明书)carefully.The slow reader may be a good reader.But he may spend too much time reading a story for fun.So the reader who reads everything quickly or the one who reads everything slowly isn't really a good reader.Here are four things to remember about the speed of reading.Knowing why you are reading will help you to know whether(是否)to read quickly or slowly.Some things should be read slowly throughout.Examples(例子)are instructions for making or doing something.Math books,scienc and story﹣books are full of important information.You must rea these things slowly to understand and remember everything important.Some things should be read quickly throughout.Examples are stories for enjoyment,letters from friends,and some news from newspapers.In some of your reading,you must change your speed from fast to slow and slow to fast.You will need to read some pages quickly and then slow down and do more careful reading when you come to important ideas.47.The underlined word throughout means C.A.开始B.结束C.始终D.穿过48.You should read slowly when you read D.A.letters from friendsB.news from newspapersC.picture﹣books for funD.important information from story﹣books。
重庆南开中学初2014级七年级下期期末考试

重庆南开中学初2014级七年级下期期末考试数学试题(满分:100分 时间:120分钟)一、选择题(本题共12小题,每题2分,共24分)请把选择题的答案填涂在机读卡上. 1、单项式53xy -的次数为( )A .5B .6C .7D . 82、下列汽车标志中,不是轴对称图形的是( )A B C D3、据统计,今年重庆市约有37. 9万名考生参加中考, 37. 9万保留两位有效数字约为( )A .43710⨯B .43810⨯C .53.710⨯D .53.810⨯4、在一个不透明的口袋里,装了若干个除颜色不同其余都相同的球,如果口袋中有7个 红球,且摸到红球的概率为14,那么口袋中球的总个数为( ) A .28个B .21个C .14个D .7个5、如图所示的长方形纸片,先沿虚线向右对折,接着将对折后的纸片沿虚线剪下一个小圆 和一个小三角形,然后将纸片打开,打开后的图形是( )A B C D 6、下列几组线段中,不能构成直角三角形的是( )A .10,24,26B .9,40,41C .8,15,16D .6,8,107、若224445m n m n +=--,则m ²n 的值为( )A .1B .-1C .4D .-48、已知代数式133m xy +-与252m n x y -是同类项,那么3m n + 的值为( )A .-1B .1C .±1D .09、已知0a <,那么22a a -的值为( )A .aB .-aC .3aD .-3a10、如图,在△ABC 和△ADE 中:①AB = AD ;②AC = AE ;③BC = DE ;④∠C = ∠E ;⑤∠B = ∠ADE .下列四个选项分别以其中三个为条件,剩下两个为结论,则其中错误的是( ) A .若①②③成立,则④⑤成立. B .若①②④成立,则③⑤成立. C .若①③⑤成立,则②④成立.D .若②④⑤成立,则①③成立.ED CABBCAFGEBACD第10题图 第11题图 第12题图11、如图,小正方形的边长为1,△ABC 的三个顶点均在格点上,则AB 边上的高是( )A .322B .3510C .355D .45512、如图,在梯形ABCD 中,AD ∥BC ,∠ABC = 90°,∠DCB = 60°,AD = 2,AC 平分∠BCD ,DE ⊥AC 于点F ,交BC 于点G ,交AB 延长线于点E ,且AE = AC .则下列四个结论:①4ADC S ∆=;②3AB =;③BG = 1;④GC = 2BG .其中正确的有( )个 A .1B .2C .3D .4二、填空题(本题共12小题,每题2分,共24分)请把填空题的答案填入答题卷的横线上. 13、16的平方根是______________.14、周末小华在家做作业时,在镜子里看到后面墙上电子钟的示数如下图所示,那么此刻的时间为.a bcd 21ED BC A第14题 第15题 第16题 15、如图,a ∥b ,c ⊥d ,∠1 = 40°,则∠2 = ___________.16、如图,△ABC 中,∠B = 40°,AC 的垂直平分线交AC 于点D ,交BC 于点E ,且∠EAB ∶∠CAE = 3∶1,则∠C = ___________.17、一个等腰三角形的两边长分别为3和4,则此三角形的周长为______________. 18、设730-的整数部分为a ,小数部分为b ,那么a – b 的值为_______________. 19、若291x kx -+是完全平方式,则k 的值为_______________. 20、若1922213=-++m m ,则m 的值为________________.21、如图(1),直线l 上有12,A A 两点,它们与直线外一点P 能组成1个三角形;如图(2),直线l 上有123,,A A A 三点,它们与直线外一点P 能组成3个三角形; 按这样的规律,如图(3),如果直线l 上有123,,n A A A A ⋅⋅⋅共n 个不重合的点,那么 它们与直线外一点P 能组成__________________(用含n 的代数式表示)个三角形.图(1) 图(2) 图(3)22、下列四种说法:①等腰三角形是轴对称图形,它的对称轴是顶角的平分线;②三角形的三条高都在三角形内,且都相交于一点;③在△ABC 中,若1123A B C ∠=∠=∠,则△ABC 一定是直角三角形;④一个三角形的两边长为8和10,那么它的第三边b 的取值范围是218b <<.其中正确的是_______________(填序号).23、如图,正方形ABCD 的边长为4,E 是BC 边的中点,F 是AC 边上一动点,则FE +FB 的最小值是______________.E BCADFEFC'DABC第23题图 第24题图24、如图,将一张矩形纸片ABCD 沿对角线BD 折叠,点C 的对应点为C′,再将所折得的图形沿EF 折叠,使得点D 和点A 重合.若AB = 6,BC = 8,则折痕EF 的长为___________.l A 3A 2A1Pl A 2A1PlA n…A 4A 3A 2A 1P重庆南开中学初2014级七年级下期期末考试数学试题答题卷(满分:100分 时间:120分钟)题号 一 二 三 四 五 总分 满分 24分24分22分4分26分100分得分一.选择题(每小题2分,共24分)(温馨提示:请将选择题答案填涂在机读答题卡中)二、填空题(每小题2分,共24分)13、_____________;14、_____________;15、 ;16、 ; 17、 ;18、 ;19、 ;20、 ;21、 ;22、 ;23、 ;24、 .三、计算题:(本大题共5个小题,25-28题每小题4分,29题6分,共22分)解答时每小题必须给出必要的演算过程或推理步骤. 25、011(5)25()102π--+-+ 26、243238252(2)()()2x x x x x x ⎛⎫-⋅----+÷ ⎪⎝⎭27、32113184332+--+ 28、()2()(3)(3)2x y x y y x y y x ---+--29、先化简,再求值:222(2)()2()a b a a b a b ----+,其中,31a =+,31b =-.四、作图题(4分)30、市规划局准备修建一个加油站,如下图所示,设计要求:加油站到A ,B 两个城镇的距离必须相等,到两条高速公路a ,b 的距离也必须相等,加油站P 应该修在什么位置,请用尺规作图画出P 点所有可能....的位置.(不写已知,求作和作法,保留作图痕迹)abAB五、解答题(本大题共4个小题,31题6分,32题5分,33题7分,34题8分,共26分)解答时每小题必须给出必要的演算过程或推理步骤.31、“龟兔赛跑”的故事同学们都非常熟悉,图中的线段OD 和折线OABC 分别表示了“龟兔 赛跑”时这两只动物运动的路程与时间关系, 请你根据图中给出的信息,解决下列问题: (1)线段OD 表示赛跑过程中_____________ (填“兔子”或“乌龟”)运动的路程与时间关 系,赛跑的全程是___________米. (2)兔子在睡觉前每分钟跑___________米, 乌龟每分钟爬____________米.(3)乌龟用了___________分钟追上了正在睡觉的兔子.(4)兔子醒来,以160米/分的速度跑向终点,结果还是比乌龟晚到了1分钟,那么兔子 中间停下睡觉用了___________分钟.32、如图,在△ABC 中,D 是BC 上一点,BE ⊥AD 于点E ,CF ⊥AD 交AD 延长线于点F ,且BE = CF .请你判断AD 是△ABC 的中线还是角平分线?并证明你的结论.ot /分钟s /米700307D1500A BC31FED A BC33、如图,四边形ABCD 中,AB ⊥BC 于点B ,CD ⊥BC 于点C ,M 为BC 上一点, MA = MD ,∠AMB = 75°,∠DMC = 45°,求证:AB =BC .B ADCMFC AB ED34、如图1,△ABC 是等边三角形,点E 在AC 边上,点D 是BC 边上的一个动点,以DE 为边作等边△DEF ,连接CF .(1)当点D 与点B 重合时,如图2,求证:CE + CF = CD ;(2)当点D 运动到如图3的位置时,猜想CE 、CF 、CD 之间的等量关系,并说明理由;(3)只将条件“点D 是BC 边上的一个动点”改为“点D 是BC 延长线上的一个动点”,如图4,猜想CE 、CF 、CD 之间的等量关系为___________________(不必证明).FC AB ED图4FC AB (D )EFCAB ED图1图2图3。
重庆南开(融侨)中学2018-2019学年初2021级七下期末数学试卷(无答案)

重庆南开(融侨)中学2018-2019学年第二学期初2021级期末数学试卷(全卷五个大题,满分150分,考试时间120分钟)一、选择题(本大题共12小题,每小题3分,共36分)1.下列图形中,不是轴对称图形的是( ▲ )2.下列运算正确的是( ▲ )A.5322a a a =+B.248a a a =÷C.1553a a a =⋅D.4222)(b a ab = 3.已知等腰三角形的两边长分别为3和7,则其周长为( ▲ )A.11B. 13C.15D.174.下列叙述不正确的是( ▲ )A.掷一枚骰子,向上的一面出现的点数为4是随机事件B.某种彩票中奖的概率为1%,那么买100张这种彩票一定会中奖C.某兴趣小组14位同学中至少两人的生日在同一月份是必然事件D.在相同条件下,试验的次数足够大时,某一随机事件发生的频率会稳定于某一数值5.如图,在4×4的方格中随机撒一颗大小忽略不计的沙粒,撒到阴影部分的概率是( ▲ ) A.167 B.83 C.163 D.416.如图,根据图中的运算程序进行计算,当输入4=x 时,输出的结果y 值为( ▲ )A. 2B. 4C. 9D. 117.如图,直线21l l ∥,AB=BC ,CD ⊥AB 于点D ,若∠DCA=20°,则∠1的度数为( ▲ )A. 80°B.70°C.60°D.50°8.将若干个菱形按如图所示的规律排列:第1个图形有5个菱形,第2个图形有8个菱形,第3个图形有11菱形,…,则第10个图形有( ▲ )个菱形.A.30B.31C.32D.339.若13,122=+=-b a b a ,则ab 等于( ▲ )A.6B.7C.-6D.-710.如图,在△ABC 中,已知点D 、E 、F 分别为边BC 、AD 、CE 的中点,且△ABC 的面积是12,则△BEF 的面积是( ▲ )A.2B.3C.4D.611.《九章算术》中有一题:今有二马、一牛价过一万,如半马之价,一马、二牛价不满一万,如半牛之价.问、牛、马价各几个?译文:现有二匹马加一头牛的价钱超过一万,超过的部分正好是半匹马的价钱;一匹马加上二头牛的价钱不到一万,不足部分正好是半头牛的价钱,求一匹马、一头牛个多少钱?设一匹马的价钱是x ,一头牛的价钱是y ,则可建立方程组为( ▲ ) A.⎪⎪⎩⎪⎪⎨⎧=++=++1000021)2(1000021)2(y y x x y x B.⎪⎪⎩⎪⎪⎨⎧=++=-+1000021)2(1000021)2(y y x x y x C.⎪⎪⎩⎪⎪⎨⎧=-+=-+1000021)2(1000021)2(y y x x y x D.⎪⎪⎩⎪⎪⎨⎧=++=++1000021)2(1000021)2(y y x x y x 12.如图,∠AOB=20°,点M 、N 分别是边OA 、OB 上的定点,点P 、Q 分别是边OB 、OA 上的动点,记∠MPQ=α,∠PQN=β,当MP+PQ+QN 最小时,则αβ-的值为( ▲ )A.10°B.20°C.40°D.60°二、填空题(本大题共12小题,每小题3分,共36分)13.2019年1月1日,“学习强国”平台全国上线,截止至2019年6月17日,重庆市党员“学习强国”APP 注册人数约1380000,参学覆盖率达71%,稳居全国前列,将数据1380000用科学技术法表示为 ▲ .14.已知,2=-b a 那么=+ba 33 ▲ .15.如图,点D 是AB 边上的中点,将△ABC 沿过点D 的直线DE 折叠,使点A 落在BC 边上F 处,如果∠B=65°,则∠BDF= ▲ .16.如图,直线b a ∥,在Rt △ABC 中,点C 在直线a 上,若∠1=54°,∠2=24°,则∠B 的度数为 ▲ .17.一个不透明的袋子里装有6个红球和若干个白球,这些球除颜色外完全相同,从袋子中随机摸出一个球,这个球是白色的概率为52,那么袋子里白球的个数为 ▲ . 18.如图,在等腰△ABC 中,AB=BC ,∠B=120°,线段AB 的垂直平分线分别交AB 、AC 于点D 、E ,若AC=12,则DE= ▲ .19.若a ,b 满足0106222=++-+b a b a ,则a +b =的值是 ▲ .20.如图,AD 是△ABC 的角平分线,DE ⊥AB 于点E ,12,440===∆AC DE S ABC ,,则AB 长是 ▲ .21.关于y x ,的二元一次方程组⎩⎨⎧=+-=+8235232y x k y x 的解满足3=+y x ,则=k ▲ . 22.如图,在△ABC 河和△DEF 中,∠ACB=∠EFD=90°,点B 、F 、C 、D 在同一直线上,已知AB ⊥DE ,且AB=DE ,AC=6,EF=8,DB=10,则CF 的长度为 ▲ .23.如图1是一个装有A 、B 两个阀门的空容器,打开A 阀门水将匀速注入甲容器,打开B 阀门甲容器的水将匀速注入乙容器(水流动过程的时间忽略不计),小溪先打开A 阀门,几分钟后再打开B 阀门,甲、乙两容器内水的体积的差值y (升)和小溪打开A 阀门的时间x (分钟)之间的关系如图2所示,则图2中转折点P 对应的时间是 ▲ 分钟.24.6月18日晚,苏宁易购发布618全程战报:从6月1日到18日晚6点,苏宁依托线上线下全场景优势,逆势增长.经调查,苏宁易购线上有甲乙两家在销售华为A 手机、华为B 电脑和华为C 耳机.已知每部A 手机的利润率为40%,每台B 电脑的利润率为60%,每副C 耳机的利润率为30%,甲商家售出的B 电脑和C 耳机的数量都是A 手机的数量的一半,获得的总利润为50%,乙商家售出的A 手机的数量是B 电脑的数量的一半,售出的C 耳机的数量是B 电脑的数量的134,则乙商家获得的总利润率是 ▲ . 三、计算题:(本大题共4小题,每小题4分,共16分)25.计算:302019)21()14.3(|42|)1(--⨯---+-π26.化简:)3)(3()5(2)2(2x y y x y x x y x +-+---27.解方程组:⎩⎨⎧-=-=-75412y x y x28.解方程组:⎪⎩⎪⎨⎧=-=-++1811101233y x y x y x四、解答题(本大题共4小题,29小题8分,其余每小题10分,共38分)29.如图,直线AB ∥CD ,∠ACD 的平分线CE 交AB 于点F ,∠AFE 的平分线交CA 延长线于点G.(1)证明:AC=AF;(2)若∠FCD=30°,求∠G 的大小.30.某中学为了调查本校初2021级学生的跳绳水平,抽取了某班60名学生的跳绳成绩(满分为10分,分数均为自然数),绘制如下两幅不完整的统计图.请根据统计图的信息,回答下列问题.(1)在扇形统计图中,a的值是,成绩为10分所在扇形的圆心角是度;(2)补全条形统计图;(3)若从该班男生中随机抽取一人,求这名男生跳绳成绩不是10分的概率.31.互联网时代,发达的物流业改变了我们的生活.某快递公司的分发中心、菜鸟驿站、快递员公寓依次分布在同一条直线上,快递员甲、乙分别同时从菜鸟驿站和分发中心出发,甲先骑自行车回到分发中心,将自行车归还分发中心后步行经过菜鸟驿站返回公寓(归还自行车的时间忽略不计),乙先从分发中心步行到菜鸟驿站,步行速度与甲的步行速度相同,到达菜鸟驿站后停下来继续完成剩余工作,随后跑步回公寓,最后两人同时到达公寓.甲、乙两人与公寓的距离y(米)与出发的时间x(分钟)之间的关系如图所示.(1)甲骑自行车的速度为米/分,乙跑步的速度为米/分;(2)乙在菜鸟驿站停留的时间为分钟;(3)甲乙第二次相遇后再经过多少分钟他们相距450米?32.如图,在△ABC和△ABD中,∠BAC=∠ABD=90°,点E为AD边上的一点,且AC=AE,连接CE交AB于点G,过点A作AF⊥AD交CE于点F.(1)求证:△AGE≌△AFC;(2)若AB=AC,求证:AD=AF+BD.五、解答题(本大题2个小题,每小题12分,共24分)33.随着科技的发展,只能制造逐渐成为一种可能的生产方式.重庆某电子零部件生产商原来采用自动化程度较低的传统生产方式,工厂有熟练工人和新工人共100人,熟练工平均每天能生产30个零件,新工人平均每天能生产20个零件,所有工人刚好用30天完成了一项7.2万个零件的生产任务.(1)请问该工厂有熟练工,新工人各多少人?(请列二元一次方程组解题)(2)今年,某自动化技术团队为工厂提供了A、B两种不同型号的机器人,且两种机器人都可以单独完成零件的生产.已知A型机器人的售价为80万元/台,B型机器人的售价为120万元/台.工厂准备试采购价值840万元的机器人设备,两种机器人都至少购买一台,若840万元刚好用完,求出所有可能的购买方案.(3)已知一个零件的毛利润(只扣除了原材料成本)为10元,若选择传统生产方式,熟练工每月基本工资3000元,新工人每月基本工资2000元,在基本工资之上,工厂还需额外支付计件工资5元/件,传统生产方式的设备成本忽略不计.若选择智能制造方式生产,A型机器人每月生产零件1.5万个,B型机器人每月能生产零件2.7万个,1台A型机器人需要8名技术人员操控,一台B型机器人需要12名技术人员操控,技术人员每人工资1万元,实际生产过程中,一台A型机器人平均每月的总成本为6万元(包含所以设备成本和维护成本),一台B型机器人平均每月的总成本为8万元(包含所以设备成本和维护成本).请你比较传统的生产方式和(2)中的所有购买方案对应的智能生产方式,哪种生产方式每月的总利润最大,最大利润为多少万元?(注:每月均按30天计算)34.已知:在Rt △ABC 中,∠ACB=90°,过点C 作CD ⊥AB 于点D ,点E 是BC 上一点,连接AE 交CD 于点F.(1)如图1,若AE 平分∠CAB ,CP 平分∠BCD ,求证:FP=EP ;(2)如图2,若CE=CA ,过点E 作EG ⊥CD 于点G ,点H 为AE 的中点,连接DH ,GH ,判断△GDH 的形状,并证明;(3)如图3,在(2)的条件想,点K 为AE 上一点,连接GK ,点M 为GK 的中点,连接MH ,过点D 作DH ⊥MH ,交MH 的延长线于点N ,∠GHA=90°-21∠GHM ,若NH ∶HM=8∶5,△GHK 的面积为10,求△GDH 的面积.。
2014-2015学年重庆市南开中学七年级(下)期末英语试卷

2014-2015学年重庆市南开中学七年级(下)期末英语试卷I.听力测试.(共15分)第一节、情景反应.(每小题1分,共4分)根据你所听到的句子,从A、B、C三个选项中选出最恰当的答语,并把答题卡上对应题目的答案标号涂黑,听一遍.1.(1分)A.About five kilometers.B.About five minutes.C.On foot.2.(1分)A.She is tall.B.She likes reading.C.She is kind.3.(1分)A.Sounds great.B.I'm sorry to hear that.C.Sure.4.(1分)A.No,you can't.B.Clark speaking.C.Who are you?第二节、对话理解.(每小题1分,共4分)根据你所听到的对话及问题,从A、B、C三个选项中选出最恰当的答语,并把答题卡上对应题目的答案标号涂黑,听一遍.5.(1分)A.Not to eat in the shop.B.Not to eat in the restaurant.C.Not to eat in the library.6.(1分)A.Doing homework.B.Watching TV.C.Playing basketball.7.(1分)A.On Bridge Street.B.On Long Street.C.Across from Bridge Street.8.(1分)A.By plane.B.By bus.C.By train.第三节、长对话理解.(每小题3分,共3分)9.(3分)根据你所听到的长对话,完成9到11三个小题.从A、B、C三个选项中选出正确答案,并把答题卡上对应题目的答案标号涂黑,听两遍.9.How's the weather today?A.It's rainy.B.It's sunny.C.It's windy.10.What sports do they play?A.Volleyball.B.Baseball.C.Basketball.11.Why can't Jack wear glasses when he does sports?A.Because he can't play baseball.B.Because he can't see Kate.C.Because it's dangerous.第四节、短文理解.(每小题4分,共4分)12.(4分)根据短文内容,完成12到15四个小题.请从A、B、C三个选项中选出正确答案,并把答题卡上对应题目的答案标号涂黑,听两遍.12.Tom has.A.a sisterB.a brotherC.a sister and a brother13.Lucy has hair.。
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南开中学七年级下期期末考试数学试题(满分:100分 时间:120分钟)一、选择题(本题共12小题,每题2分,共24分)请把选择题的答案填涂在机读卡上. 1、单项式53xy -的次数为( )A .5B .6C .7D . 82、下列汽车标志中,不是轴对称图形的是( )A B C D3、据统计,今年重庆市约有37. 9万名考生参加中考, 37. 9万保留两位有效数字约为( )A .43710⨯B .43810⨯C .53.710⨯D .53.810⨯4、在一个不透明的口袋里,装了若干个除颜色不同其余都相同的球,如果口袋中有7个 红球,且摸到红球的概率为14,那么口袋中球的总个数为( ) A .28个B .21个C .14个D .7个5、如图所示的长方形纸片,先沿虚线向右对折,接着将对折后的纸片沿虚线剪下一个小圆 和一个小三角形,然后将纸片打开,打开后的图形是( )A B C D 6、下列几组线段中,不能构成直角三角形的是( )A .10,24,26B .9,40,41C .8,15,16D .6,8,107、若224445m n m n +=--,则m ²n 的值为( )A .1B .-1C .4D .-48、已知代数式133m xy +-与252m n x y -是同类项,那么3m n + 的值为( )A .-1B .1C .±1D .09、已知0a <,那么22a a -的值为( )A .aB .-aC .3aD .-3a10、如图,在△ABC 和△ADE 中:①AB = AD ;②AC = AE ;③BC = DE ;④∠C = ∠E ;⑤∠B = ∠ADE .下列四个选项分别以其中三个为条件,剩下两个为结论,则其中错误的是( ) A .若①②③成立,则④⑤成立. B .若①②④成立,则③⑤成立. C .若①③⑤成立,则②④成立.D .若②④⑤成立,则①③成立.ED CABBCAFGEBACD第10题图 第11题图 第12题图11、如图,小正方形的边长为1,△ABC 的三个顶点均在格点上,则AB 边上的高是( )A .322B .3510C .355D .45512、如图,在梯形ABCD 中,AD ∥BC ,∠ABC = 90°,∠DCB = 60°,AD = 2,AC 平分∠BCD ,DE ⊥AC 于点F ,交BC 于点G ,交AB 延长线于点E ,且AE = AC .则下列四个结论:①4ADC S ∆=;②3AB =;③BG = 1;④GC = 2BG .其中正确的有( )个 A .1B .2C .3D .4二、填空题(本题共12小题,每题2分,共24分)请把填空题的答案填入答题卷的横线上.13、16的平方根是______________.14、周末小华在家做作业时,在镜子里看到后面墙上电子钟的示数如下图所示,那么此刻的时间为.abcd21EDBC A第14题第15题第16题15、如图,a∥b,c⊥d,∠1 = 40°,则∠2 = ___________.16、如图,△ABC中,∠B = 40°,AC的垂直平分线交AC于点D,交BC于点E,且∠EAB∶∠CAE = 3∶1,则∠C = ___________.17、一个等腰三角形的两边长分别为3和4,则此三角形的周长为______________.18、设730-的整数部分为a,小数部分为b,那么a–b的值为_______________.19、若291x kx-+是完全平方式,则k的值为_______________.20、若1922213=-++mm,则m的值为________________.21、如图(1),直线l上有12,A A两点,它们与直线外一点P能组成1个三角形;如图(2),直线l上有123,,A A A三点,它们与直线外一点P能组成3个三角形;按这样的规律,如图(3),如果直线l上有123,,nA A A A⋅⋅⋅共n个不重合的点,那么它们与直线外一点P能组成__________________(用含n的代数式表示)个三角形.图(1)图(2)图(3)lA3A2A1Pl A2A1Pl An…A4A3A2A1P22、下列四种说法:①等腰三角形是轴对称图形,它的对称轴是顶角的平分线;②三角形的三条高都在三角形内,且都相交于一点;③在△ABC 中,若1123A B C ∠=∠=∠,则△ABC 一定是直角三角形;④一个三角形的两边长为8和10,那么它的第三边b 的取值范围是218b <<.其中正确的是_______________(填序号). 23、如图,正方形ABCD 的边长为4,E 是BC 边的中点,F 是AC 边上一动点,则FE +FB 的最小值是______________.E BCADFEFC'DABC第23题图 第24题图24、如图,将一张矩形纸片ABCD 沿对角线BD 折叠,点C 的对应点为C′,再将所折得的图形沿EF 折叠,使得点D 和点A 重合.若AB = 6,BC = 8,则折痕EF 的长为___________.重庆南开中学初2014级七年级下期期末考试数学试题答题卷(满分:100分 时间:120分钟)题号 一 二 三 四 五 总分 满分 24分24分22分4分26分100分得分一.选择题(每小题2分,共24分)(温馨提示:请将选择题答案填涂在机读答题卡中)二、填空题(每小题2分,共24分)13、_____________;14、_____________;15、 ;16、 ; 17、 ;18、 ;19、 ;20、 ;21、 ;22、 ;23、 ;24、 .三、计算题:(本大题共5个小题,25-28题每小题4分,29题6分,共22分)解答时每小题必须给出必要的演算过程或推理步骤. 25、011(5)25()102π--+-+ 26、243238252(2)()()2x x x x x x ⎛⎫-⋅----+÷ ⎪⎝⎭27、32113184332+--+ 28、()2()(3)(3)2x y x y y x y y x ---+--29、先化简,再求值:222(2)()2()a b a a b a b ----+,其中,31a =+,31b =-.四、作图题(4分)30、市规划局准备修建一个加油站,如下图所示,设计要求:加油站到A ,B 两个城镇的距离必须相等,到两条高速公路a ,b 的距离也必须相等,加油站P 应该修在什么位置,请用尺规作图画出P 点所有可能....的位置.(不写已知,求作和作法,保留作图痕迹)abAB五、解答题(本大题共4个小题,31题6分,32题5分,33题7分,34题8分,共26分)解答时每小题必须给出必要的演算过程或推理步骤.31、“龟兔赛跑”的故事同学们都非常熟悉,图中的线段OD 和折线OABC 分别表示了“龟兔 赛跑”时这两只动物运动的路程与时间关系, 请你根据图中给出的信息,解决下列问题: (1)线段OD 表示赛跑过程中_____________ (填“兔子”或“乌龟”)运动的路程与时间关 系,赛跑的全程是___________米. (2)兔子在睡觉前每分钟跑___________米, 乌龟每分钟爬____________米.(3)乌龟用了___________分钟追上了正在睡觉的兔子.(4)兔子醒来,以160米/分的速度跑向终点,结果还是比乌龟晚到了1分钟,那么兔子 中间停下睡觉用了___________分钟.32、如图,在△ABC 中,D 是BC 上一点,BE ⊥AD 于点E ,CF ⊥AD 交AD 延长线于点F ,且BE = CF .请你判断AD 是△ABC 的中线还是角平分线?并证明你的结论.ot /分钟s /米700307D1500A BC31FED A BC33、如图,四边形ABCD 中,AB ⊥BC 于点B ,CD ⊥BC 于点C ,M 为BC 上一点, MA = MD ,∠AMB = 75°,∠DMC = 45°,求证:AB =BC .B ADCMFC AB ED34、如图1,△ABC 是等边三角形,点E 在AC 边上,点D 是BC 边上的一个动点,以DE 为边作等边△DEF ,连接CF .(1)当点D 与点B 重合时,如图2,求证:CE + CF = CD ;(2)当点D 运动到如图3的位置时,猜想CE 、CF 、CD 之间的等量关系,并说明理由;(3)只将条件“点D 是BC 边上的一个动点”改为“点D 是BC 延长线上的一个动点”,如图4,猜想CE 、CF 、CD 之间的等量关系为___________________(不必证明).FC AB ED图4FC AB (D )EFCAB ED图1图2图3。