2015-2016 南外 初二 期末试卷 附答案
2015--2016学年度第二学期期末八年级试题(卷)

2015--2016 学年度第二学期期末八年级试题(卷)英语(考试时间:90 分钟满分 100 分)题号I II III IV V VI VII VIII总分得分第I卷听力测试(共20分)I.听力试题(本大题共20个小题,每题1分,共20分)第一题听音选图请你从下面的图片中,选出与所听到的信息相关系的一项,并将其字母标号填入题前括号内。
() 1.() 2. () 3. () 4.() 5.第二题A B CA B CA B CA B CA B C 对话理解这一大题共有 5 个小题,每题你将听到一组对话和一个问题。
请从A.B.C 三个选项中,选出一个最正确选项,并将其字母标号填入题前括号内。
() 6. A. It ’s easy for him.B. It ’s too difficult. C. He tries his best.()7. A. The sun. B. The moon. C. The earth.() 8.A. Last month.B. Next month.C. One month. () 9. A. No,they have not. B. Yes, they will. C. Yes, they have.()10. A. In March. B. In April. C. In May.第三题语篇理解这一大题你将听到一篇对话。
请你依照对话内容和所提出的5个问题,请你从A、 B、 C三个选项中选出一个最正确选项,并将其字母标号填入题前的括号内。
()11. Amy went to ______ for holiday.A. England.B. Italy.C. the USA.()12. Amy went together with ______ .A. her friends.B. her parents.C. her grandparents.()13. They went to the sand beaches ______.A. by car.B. by taxi.C. by train.()14. The weather was ______ there.A. cool and wet.B. warm and rainy.C.hot and sunny.()15. Did they wear sunglasses?.A. Yes, they did.B. No, they didn’t.C. Yes, they have .第四题语篇理解听短文,依照短文完成表格。
2015-2016(下)八年级期末试题及答案

2015~2016学年度下期期末测试题八年级 数学(满分150分,考试时间120分钟)题号 一 二 三 四 五 总分 得分得分 评卷人 一、选择题:(本大题12个小题,每小题4分,共48分)在每小题给出的四个选项中,只有一项符合题意.1. 在a 中,a 的取值范围是( )A .0≥aB .0≤aC .0>aD .0<a 2. 下列运算中错误的是 ( )A.632=⨯ B. 532=+ C. 228=÷ D.3)3(2=-3. 某校将举办一场“中国汉字听写大赛”,要求各班推选一名同学参加比赛。
为此,初二(1)班组 织了五轮班级选拔赛,在这五轮选拔赛中,甲、乙两位同学的平均分都是96分,甲的成绩的方差是,乙的成绩的方差是,根据以上数据,下列说法正确的是( ) A. 甲的成绩比乙的成绩稳定 B. 乙的成绩比甲的成绩稳定 C. 甲、乙两人的成绩一样稳定 D. 无法确定甲、乙的成绩谁更稳定 4. P 1(x 1,y 1)、P 2(x 2,y 2)是正比例函数x y 21-=图象上的两点,下列判断中,正确的是( )A 、y 1>y 2B 、y 1<y 2C 、当x 1<x 2 时,y 1<y 2D 、当x 1<x 2时, y 1>y 25. 如图是某射击选手5次射击成绩的折线图,根据图示信息,这 5次成绩的众数、中位数分别是( )A .8 、9B .7 、9C .7 、8D .8 、10 6. 甲、乙两艘客轮同时离开港口,航行的速度都是40m/min ,甲 客轮用15min 到达A ,乙客轮用20min 到达B .若A 、B 两处的 直线距离为1000m ,甲客轮沿着北偏东30°的方向航行,则乙 客轮的航行方向可能是( )5题图A .北偏西30°B .南偏西30°C .南偏西60°D .南偏东60° 7. 不能判定四边形ABCD 为平行四边形的条件是( )A .AB=CD ,AD=BCB .AB=CD ,AB ∥CDC .AB=CD ,AD ∥CD D .AD=BC ,AD ∥BC 8. 如图,在矩形ABCD 中,对角线AC 、BD 相交于点O ,∠ACB =30°, 则∠AOB 的大小为( )A, 30° B. 60° C. 90° D. 120°9. 如图,把一个小球垂直向上抛出,则下列描述该小球的运动速 度v (单位:m/s )与运动时间(单位:s )关系的函数图象中, 正确的是( )A B C D10. 已知一个直角三角形的两边长分别为8和15,则第三边长是( )A .17B .289C .161D .17或16111.如图所示,每个图形都由同样大小的矩形按照一定的规律组成,其中第①个图形的面积为6 cm 2, 第②个图形的面积为18cm 2,第③个图形的面积 为36 cm 2,……,那么第⑥个图形的面积为( )A. 84 cm 2B. 90 cm 2C. 126 cm 2D. 168 cm 2 12.如图,直线233+-=x y 与x 轴,y 轴分别交于A 、B 两点,把 △AOB 沿着直线AB 翻折后得到△AO´B ,则点O´的坐标是( ) A .(3,3) B .(3,3)ByBO ´y9题图8题图ODCBA8题图11题图C .(2,32)D .(32,4)13. 计算:28-= .14. 如图,在△ABC 中,D ,E 分别是边AB ,AC 的中点,若BC=6,则DE= .15. 如图已知函数b x y +=2与函数3-=kx y 的图像交于点P ,则 不等b x kx +>-23的解集是 .16. 有一组数据:3,a ,4,6,7.它们的平均数是5,那么这组数据的方差是________. 17. 如图,直线42+=x y 与x 、y 轴分别交于点A 、B 两点,以OB 为边在y 轴右侧作等边△OBC ,将点C 向左平移,使其对应点C´恰好落在直线AB 上,则点C´的坐标为 . 18. 如图,在菱形ABCD 中,∠A=60°,E 、F 分别是AB 、AD 的中点,DE 、BF 相交于点G ,连接BD 、CG .给出以下结论:①∠BGD=120°;②△BDF ≌△CGB ;③BG+DG=CG ;④S △ADE =43AB 2. 其中正确的有 . 19. 计算:1)31()12(132---+-得分 评卷人 二、填空题:(本大题6个小题,每小题4分,共24分)得分 评卷人 三、解答题:(本大题2个小题,每小题7分,共14分)解答时每小题必须写出必要的演算过程.14题图17题图18题图15题图20. △ABC 中,∠C=90°,BC=3,AB=5,CD ⊥AB 于D , (1)求AC 长; (2)求CD 长.得分 评卷人 四、解答题:(本大题4个小题,每小题10分,共40分)解答时每小题必须写出必要的演算过程或推理过程.21. 先化简,再求值:)1()1112(2-⋅++-x x x ,其中x=313-.20题图22. 某公司招聘人才,对应聘者分别进行阅读能力、思维能力和表达能力三项测试,其中甲、乙两人的成绩如下表(单位:分):项目人员阅读思维表达甲93 86 73乙95 81 79(1)若根据三项测试的平均成绩在甲、乙两人中录用一人,那么谁将能被录用?(2)根据实际需要,公司将阅读、思维和表达能力三项测试得分按3:5:2的比确定每人的最后成绩,若按此成绩在甲、乙两人中录用一人,谁将被录用?(3)公司按照(2)中的成绩计算方法,将每位应聘者的最后成绩绘制成如图所示的频数分布直方图(每组分数段均包含左端数值,不包含右端数值,如最右边一组分数x为:85≤x<90),并决定由高分到低分录用8名员工,甲、乙两人能否被录用?请说明理由,并求出本次招聘人才的录用率.23. 如图,直线AB 与x 轴交于点A(1,0),与y 轴交于点B(0,-2). (1)求直线AB 的解析式;(2)若直线AB 上的点C 在第一象限,且S △BOC =2,求点C 的坐标.24.如图,在平行四边形ABCD 中,∠C =60°,M 、N 分别是AD 、BC 的中点,BC =2CD (1)求证:四边形MNCD 是平行四边形; (2)求证:BD =3MN 得分评卷人五、解答题:(本大题2个小题,每小题12分,共24分)解答时每小题必须写23题图 ABOxyABO Cx y24题图出必要的演算过程或推理过程.25. 某店因为经营不善欠下38400元的无息贷款的债务,想转行经营服装专卖店又缺少资金.“梦想中国秀”栏目组决定借给该店30000元资金,并约定利用经营的利润偿还债务(所有债务均不计利息).已知该店代理的品牌服装进价为每件40元,该品牌服装日销售量y(件)与销售价x(元/件)之间的关系可用图中的一条折线(实线)来表示.该店应支付员工的工资为每人每天82元,每天还应支付其它费用为106元(不包含债务).(1)求日销售量(件)和销售价(元/件)之间的函数关系式;(2若该店暂不考虑偿还债务,当天的销售价为48元时/件时,当天正好收支平衡(收入=支出),求该店员工的人数;25题图26、猜想与证明:如图①摆放矩形纸片ABCD 与矩形纸片ECGF ,使B ,C ,G 三点在一条直线上,CE 在边CD 上.连结AF ,若M 为AF 的中点,连结DM ,ME ,试猜想DM 与ME 的关系,并证明你的结论. 拓展与延伸:(1)若将“猜想与证明”中的纸片换成正方形纸片ABCD 与正方形纸片ECGF ,其它条件不变,则DM和ME 的关系为_______;(2)如图②摆放正方形纸片ABCD 与正方形纸片ECGF ,使点F 在边CD 上,点M 仍为AF 的中点,试证明(1)中的结论仍然成立.ABCDEFG M26题图① ABCDEFGM26题图②2015~2016学年度下期期末测试题八年级数学答案一、选择题:1.A2. B3. A4. D5. C6. D7. C8. B9. C 10. D 11. C 12. A 二、填空题: 13.2 14.3 15. x <4 16. 2 17.(-1,2) 18. ①③三、解答题:(本大题2个小题,每小题7分,共14分)解答时每小题必须写出必要的演算过程. 19. 解:原式=23﹣1+1﹣3=3.……………………………… 7分20.解:(1)∵△ABC 中,∠C=90°,BC=3,AB=5,∴AC=22BC AB -=2235-=4;………………………………4分(2) ∵CD ⊥AB ,AB=5,由(1)知AC=4,∴AB•CD=AC•BC ,即CD=AB BC AC ⋅=534⨯=512.……………………………7分 四、解答题:(本大题4个小题,每小题10分,共40分)解答时每小题必须写出必要的演算过程或推理过程. 21.解:原式=)1()1)(1()1()1(22-⋅-+-++x x x x x=2x+2+x ﹣1=3x+1,………………………………8分 当x=313-时,原式=3. ………………………………10分 22. 解:(1)∵甲的平均成绩是:x 甲=3738693++=84(分),乙的平均成绩为:x 乙=3798195++=85(分),∴ x 乙>x 甲,∴ 乙将被录用;………………………………3分 (2)根据题意得:x 甲=253273586393++⨯+⨯+⨯(分),x 乙=253279581393++⨯+⨯+⨯(分);∴ x 甲>x 乙,∴ 甲将被录用;………………………………6分20题图(3)甲一定被录用,而乙不一定能被录用,理由如下:由直方图知成绩最高一组分数段85≤x <90中有7人,公司招聘8人,又因为x 甲分,显然甲在该组,所以甲一定能被录用;在80≤x <85这一组内有10人,仅有1人能被录用,而x 乙分,在这一段内不一定是最高分,所以乙不一定能被录用;由直方图知,应聘人数共有50人,录用人数为8人, 所以本次招聘人才的录用率为508=16%.………………………………10分 23.解:(1)设直线AB 的解析式为b kx y +=.直线AB 过点A(1,0)、B(0,-2), ∴ ⎩⎨⎧-==+20b b k 解得⎩⎨⎧-==22b k∴直线AB 的解析式为22-=x y .…………………5分(2)设点C 的坐标为(x ,y ).12222BOC S x =∴=△,··,解得x=2.∴ y=2×2-2=2 ∴ 点C 的坐标是(2,2) ………………………………10分24. 证明:(1)∵四边形ABCD 是平行四边形∴AD ∥BC ,AD =BC ,∵M 、N 分别是AD 、BC 的中点 ∴MD =NC ,MD ∥NC ,∴四边形MNCD 是平行四边形 ………………………………5分 (2)∵N 是BC 的中点,BC =2CD ∴CD =NC ∵∠C =60°,∴△DCN 是等边三角形,∴ND =NC , ∠DNC =∠NDC =60° ∴ND =NB =CN∴∠DBC =∠BDN =30°∴∠BDC =∠BDN +∠NDC =90°∴CD CD DC CD BC BD 3)2(2222=-=-=∵四边形MNCD 是平行四边形 ∴MN =CD∴BD =3MN ………………………………10分五、解答题:(本大题2个小题,每小题12分,共24分)解答时每小题必须写出必要的演算过程或推理过程. 25. 解:(1)当40≤x <58时,设函数关系式为y =k x +b .把x =40,y =60和x =58,y =24分别代入得⎩⎨⎧=+=+24586040b x b x 解得⎩⎨⎧=-=1402b k . 即y =-2x +140.………………………………4分当58x ≤x ≤71时,设函数关系式为y =mx +n .把x =58,y =24和x =71,y =11分别代入得⎩⎨⎧=+=+11712458n m n m 解得⎩⎨⎧=-=821n m . 即y =-x +82. ………………………………8分(2)设该店员工为a 人.把x =48分别代入y =-2x +140得 y =-2×48+140=44.由题意 (48-40)×44=82a +106.解得 a =3.即该店员工为3人.………………………………12分26、解:猜想与证明猜想DM 与ME 的关系是:DM =ME .………………………………2分证明:如图1,延长EM 交AD 于点H .∵四边形ABCD 、四边形ECGF 都是矩形,∴AD ∥BG ,EF ∥BG ,∠HDE =90°.∴AD ∥EF . ∴∠AHM =∠FEM . 又∵AM =FM ,∠AMH =∠FME ,∴△AMH ≌△FME . ∴HM =EM . 又∵∠HDE =90°,∴DM =EM .………………………………6分拓展与延伸(1)DM 和ME 的关系为:DM =ME ,DM ⊥ME .………………………………8分(2)证明:如图2,连结AC .∵四边形ABCD 、四边形ECGF 都是正方形,∴∠DCA =∠DCE =45°,∴点E 在AC .∴∠AEF =∠FEC =90°.又∵M 是AF 的中点, ∴ME =21AF . ∵∠ADC =90°,M 是AF 的中点,∴DM =21AF . ∴DM =EM .∵ME =21AF =FM ,DM =21AF =FM , ∴∠DFM =21(180º-∠DMF ),∠MFE =21(180º-∠FME ), A BC D E F G M 图1 H A B C D E F G M 图2∴∠DFM +∠MFE =21(180º-∠DMF )+21(180º-∠FME ) =180°-21(∠DMF-∠FME ) =180°-21∠DME . ∵∠DFM +∠MFE =180°-∠CFE =180°-45°=135°, ∴180°-21∠DME =135°. ∴∠DME =90°.∴DM ⊥ME .………………………………12分。
2015-2016学年度外研版初二英语上册期末试卷及答案

2015-2016学年度初二英语上册期末试卷一.单项选择(本大题有20小题,每小题1分,共20分)1.Vienna is old city the river Danube.A、the; inB、an; onC、a; atD、an; of2.I found difficult to talk with a foreigner in English.A、themB、itC、meD、that3.---Where is John?---Look! He ____ in the garden.A.playsB. playedC. will playD. is playing4.There are about ____ people in the hall.A. two hundreds ofB.two hundredsC. hundreds ofD. two hundred5.Mike likes mountains and lakes. He hopes to ____ nature when he is free.A.be far fromB.be interested inC. be close toD.be crowded with6.We are all here ____ Lily. Where is she?A. exceptB.besidesC. besideD. as well as7. We agreed ___________ to see a film this Saturday evening.A. goB. goingC.wentD. to go8. The number of pandas is getting _________ because their living areas are becoming farmland.A. less and lessB. larger and largerC. smaller and smallerD. fewer and fewer9. It is a story about a young boy ______Harry Porter.A. callB. callingC. callsD. called10. It took her much time __________ English out of class.A. practice speakingB. to practice to speakC. to practice speakingD. practice to speaking11. He offered __________me around the city.A. showB. to showC. showingD. be showed12.Everyone _____ the Spring Festival especially the kids, because they can get money in red packets.A enjoyB enjoysC is enjoyingD are enjoying13.---Do you know Lin Shuhao?---Yes, he is famous_____ playing basketball _____a basketball star.A. for; asB. as; forC. to; atD. at; to14.---You shouldn’t forget what he says at the meeting.---I’ll______his words.A.write downB.take awayC.hear fromD.learn about15.It’s______cheaper and______enjoyable to travel by train than by plane.A.much;moreB.very;very muchC.more;moreD.more;much16.---Would you like______to drink?---Yes,I’d like a cup of coffee.A.something elseB.else somethingC.anything elseD.else anything17.My little sister stopped______and played the toy dog.A.to cryB.criesC.criedD.crying18.---Who is the man over there?Is it Mr.Li?---No,it______be him.Mr.Li is much taller.A.mustn’tB.may notC.can’tD.needn’t19.-----Mr. Lee ______ to a student when I entered the classroom this morning. ----He is very patient _____ he is young.A talking; butB talks; thoughC was talking; thoughD talked; however20.---Oh, we missed the last bus to the museum.--- ____. We can go there by taxi and it’s faster.A.Never mind.B.I’m not sure about it.C. Bad luck!D. That’s too bad!二.完形填空(本大题有10小题,每小题1分,共10分)What is the best way to study?This is a very important question.Some Chinese students often__1__very hard__2__long hours.This is a__3__habit(习惯),but it is not a better way to study.A good student must__4__enough sleep,enough food and enough rest.Every__5__you__6__to take a walk or play basketball or ping-pong or sing a song.When you__7__to your studies,you’ll find yourself__8__than before and you’ll learn more.Perhaps we can__9__that learning English is like taking Chinese medicine.We mean that like Chinese medicine,the effects(效果)of your study__10__slowly but surely.Learn every day and effects will come just like Chinese medicine.1.A.play B.study C.sleep D.think2.A.at B.in C.for D.with3.A.best B.better C.good D.bad4.A.have B.do C.want D.make5.A.month B.week C.hour D.day6.A.want B.hope C.need D.wish7.A.begin B.return C.go D.are8.A.stronger B.weaker C.strong D.weak9.A.say B.guess C.talk D.know10.A.return e C.give D.get三、阅读理解。
2015-2016八年级英语期末试卷及答案

2015~2016学年度上学期期末教学质量检测试题八年级英语本试卷分第I卷(选择题)和第II卷(非选择题)两部分。
满分100分,考试时间100分钟。
请考生掌握好时间,沉着答题。
第Ⅰ卷(选择题共45分)注意:每小题只有一个正确答案。
答案选出后,请填入第Ⅱ卷前的答题栏内或用铅笔转涂到答题卡上,否则不得分。
一、听力测试(共15小题,计15分)注意:听力测试分四部分,共20小题。
做题时,先将答案画在试卷上,录音内容结束后,将所选答案转涂到答题卡上。
(一) 听句子,选择与句子内容相对应的图片。
每个句子读两遍。
A B CD E(涂AB)F(涂CD)1. 2. 3. 4. 5.(二) 听对话和问题,根据所听内容,选择最佳答案。
对话和问题都读两遍。
6. A. Went to the mountains. B. With her family. C. Yes, she does.7. A. Once a month. B. Once a week. C. Once a year.8. A. Tom is thinner than Sam. B. Tom is shorter than Sam. C. Tom is heavier than Sam.9. A. A cheese sandwich. B. A banana milk shake. C. Beef noodles.10. A. Tina. B. Paul. C. Peter and Mary. (三) 听短文,根据短文内容,判断下列句子正误,正确的用“A”表示,不正确的用“B”表示。
短文读两遍。
听短文前,你们有20秒钟的时间阅读下列句子。
11. Today there are already robots working in factories.12. Robots will get bored when they help to do simple jobs over and over again.13. Some robots in Japan can walk and dance.14. James White thinks that robots will never be able to wake up.15. Many scientists think that robots will even be able to talk in 20 years.请考生们先找到第四大题的A) 部分。
2015--2016八年级期末英语试卷

2015~2016学年度八年级第一学期末英语试题A卷(100分)一.单词辨音:从A.B.C.D四个选项中,找出划线部分与所给单词的划线部分读音相同的选项。
(5分)( )1.apple A. allow B. about C. animal D.above ( )e A. program B.another C. cold D. police ( )3.brother A. fifth B.math C. thank D. together ( )k A.drink B.lifestyle C. twice D.exercise ( )5.camp A.notice B.car C.necessary D.balance二.词汇(20分)A)按要求写出下列单词的形式。
(5分)6. have(第三人称单数) ________7.go(过去式)________8.party(复数) ______ 9.big(比较级) 10.serious(比较级)B) 根据汉语意思和首字母提示完成句子(5分)11.The (结果) is surprising.12. Thanks a lot for ______ ( 邀请) me to your birthday party.13.She (观看)TV every day.14.It takes me five (分钟)to get up.15.How f do you live from school?C) 用所给单词的适当形式填空。
(5分)16.Listen! She is (sing).That sounds interesting.17.She (watch) TV every day.18.My friend is (difference) from me.19.My ruler is (long) than your ruler.20.He (visit) his grandfather yesterday.D)用方框内的词填空(5分)more interesting, come, planning, wants, get to21.Do you want to to my birthday party.22.How does Mingming _______ school in the moring. 23.I’m ________ my vacation on I taly this weekend.24.Mom ________ me to get up at 6 o’clock every day.25.Traveling by air is _______________ than by train.三.单项选择(25分)( ) 26.Running in the morning is good _______ your _________.A.for, healthyB.to ,healthyC.for ,healthD.to ,health( )27.There are lots of __________ between them.A.differenceB.differentC.differentsD.differences( )28.As _______ math ,I am the best in my class.A.forB.onC.inD.with( )29.Do you all study in ________ school?A.sameB.same theC. the sameD.a same( )30.------- ________ do you go to the movies?------ Twice a month.A.HowB.WhereC.How longD.How often( )31.There are fifty students in my class. Four of us are American, so _________ of us are Chinese.A.noB.someC.mostD.all( )32._________ do you eat vegetables? Because they’re good for my health.A.How longB.How oftenC.What timeD.Why( )33._________ is bad for our health.A.Eat junk foodB.Eating junk foodC.ReadingD.Exercise( )34.Uncle Li stopped ______ the bike when he heard someone knocking at (敲)the door.A.to mendB.mendingC. mendD.mended( )35.This kind of cake smells ______ but tastes ________.A.well; badlyB.good; badlyC.well; badD.good; bad( )36.Most students ______ bikes to school in China.A.ridesB.rideC.ridingD.to ride( )37.This ruler is long. Please give me a _______ one.A.tallerB.shorterC.olderD.newer( )38It’s impor tant _______.A.to eat vegetablesB.eat vegetablesC.eating vegetablesD.eats vegetables( )39Liu Ying is as _______ as her mother.A.beautifulB.more beautifulC.beautifulerD.more beautifully ( )40.______ do you think of the transportation?A.WhatB.HowC.WhenD.Where( )41.What’s your father’s ________?A.doB.thingsC.jobD.does( )42.I want to be a ______ when I grow up. I’ll make people’s teeth more healthy and beautiful.A.doctorB.teacherC.dentistD.driver( )43.------Paul, do you know the man standing at the door?------Yes, he is one of ______ friends.A.IB.meC.myD.mine( )44.--------- ___________? ---------I feel terrible.A.What’s your nameB.How old are youC.What’s the matterD. Who are you( )45------ Do you have a ______?------- Yes .I can hardly make any sound(声音).A.headacheB.stomachacheC.toothacheD.sore throat( )46.Now children have to study hard ________ their tests.A.inB.onC.toD.for( )47.Which subject are you _______ at, English or math?A.wellB.betterC.niceD.smart( )48._______ do you live from school?A.How longB.How soonC.How oftenD.How far( )49------- _________ day it is!------ Let’s go out and have a picnic!A.How coldB.How niceC.What a cloudyD.What a lovely( )50.Do you go to school _______ bike or ______ foot?A.by ; byB.on ; onC.by ; onD.on ; by四.动词考察(10分)选择方框中动词词组填空。
外国语初中2015-2015学年度第一学期八年级物理期末考试卷附参考答案

外国语初中2015--2016学年度第一学期期末考试八年级物理试题卷一、填空题(每空1分,共16分)1.图1甲、乙是小明在路边用相机先后拍摄的两张照片,我们说图中的卡车是运动的,是因为它相对于自行车__________________;如果选取轿车为参照物,卡车的运动情况也可以描述为________________________.2.清晨,逐渐变强的闹铃声吵醒了正在熟睡的小明,他把闹铃关掉,这是在 (填“人耳处”、“传播过程中”或“声源处”)控制噪声的.这里所说的逐渐变强,指的是声音特性中的改变了。
3.如图2所示,平静湖面的上空,一只鸟正冲向水面捕食,它在湖水中的像是______像(选填“虚”或“实”),鸟在向下俯冲的过程中,像的大小是______(选填“逐渐变大”、“逐渐变小”或“不变”).4.“朝辞白帝彩云间,千里江陵一日还.两岸猿声啼不住,轻舟已过万重山.”这首诗句中包含很多物理知识.示例:诗人所听到的“猿声”是根据声音的音色来判断的,请你仿照示例写出其中一个蕴含的一个现象及其对应的物理知识。
现象:________________,知识:___________________。
5.如图3所示的甲乙两支温度计是利用液体的性质制成的.其中可以用来测沸水温度的是。
若两支温度计的测温物质可能为下面右表中所列的物质,则乙温度计中的测温液体肯定不是。
6.在密度知识应用交流会上,同学们想知道一个质量是14.4kg的课桌的体积。
于是找来和课桌相同材质的木料做样本,测得其质量是14.4g,体积为20cm3,则样本的密度为_______gcm3,课桌的体积为__________m3。
7.雨后的夜晚,路上有些积水,甲、乙两同学在较暗的月光下,甲同学迎着月光走,乙同学背着月光走。
关于地面上发亮的是水还是地,甲乙两人发生了争执:甲同学认为水面比路面亮,乙同学认为路面比水面亮。
如图4所示,你认为他们两个观点正确的为_____________________(选填“甲正确”、“乙正确”或“甲乙都正确”),这是因为无论迎着或背着月光走,月光射到水面上均会发生___________反射。
2015-2016年八年级上册英语期末试卷(附答案)

2015-2016年八年级上册英语期末试卷(附答案)听力部分(20分)一.选择正确的图画。
(6分)1. __2. _____3._____4.______5.______6.____二.选择正确的应答语。
(5分)( ) 1.A.The bus stop. B. The bus station C. The train station( )2.A.Every day. B. By bike. C. Yes, he rides a bike.( )3.A. Fifteen miles. B. Go straight. C. Turn left.( )4.A.Twice B. Three times a week. C. Fifteen minutes.( )5.A.Forty miles. B. Two years old. C. Fifty minutes.三.听对话,根据问题选择最佳答案。
(4分)( ) 1.What does Susan usually do on weekends?A. She usually watches TV at home.B. She usually relaxes in her room.C. She usually cleans her room.( ) 2. What does the man think of Li Hua’s plan for vacation?A. It’s fine.B. It’s interesting.C. It’s fun.( ) 3. Which bus is Mrs Green take to the South Street?A. A No. 49bus.B. A No. 19 bus.C. A No.40 bus.( ) 4. Does Gao Yang play volleyball better than Li Tong?A. Yes, he does.B. No, he doesn’t.C. No, they both play well.四. 听短文,判断正(T)误(F)。
2015-2016学年江苏省南京外国语学校八年级第一学期期末数学试卷带答案

2015-2016学年江苏省南京外国语学校初二(上)期末数学试卷一、选择题(每题2分,共20分)1.(2分)下列是轴对称图形的是()A.B.C.D.2.(2分)2013年12月2日,“嫦娥三号”从西昌卫星发射中心发射升空,并于12月14日在月球上成功实施软着陆.月球距离地球平均为384401000米,用四舍五入法取近似值,精确到1000000米,并用科学记数法表示,其结果是()A.3.84×107米B.3.8×107米C.3.84×108米D.3.8×108米3.(2分)某棉纺厂为了解一批棉花的质量,从中随机抽取了20根棉花纤维进行测量,其长度x(单位:mm)的数据分布如下表所示,则棉花纤维长度的数据在8≤x<32这个范围的频率为()A.0.8B.0.7C.0.4D.0.24.(2分)如图,把一个小球垂直向上抛出,则下列描述该小球的运动速度v(单位:m/s)与运动时间t(单位s)关系的函数图象中,正确的是()A.B.C.D.5.(2分)如图,已知△ABC中,AB=AC,∠ADB=∠AEC,那么图中有()对全等三角形.A.1B.2C.3D.46.(2分)在平面直角坐标系中,若直线y=kx+b经过第一、二、四象限,则直线y=bx+k不经过的象限是()A.第一象限B.第二象限C.第三象限D.第四象限7.(2分)若等腰三角形的周长是80cm,则能反映这个等腰三角形的腰长ycm 与底边长xcm的函数关系式的图象是()A.B.C.D.8.(2分)如图,在Rt△ABC中,∠C=90°,AC=5 cm,BC=12 cm,∠CAB的平分线交BC于D,过点D作DE⊥AB于E,则△BDE的周长为()A.17B.18C.19D.209.(2分)如图,直线y=﹣x+m与y=nx+4n(n≠0)的交点的横坐标为﹣2,则关于x的不等式﹣x+m>nx+4n>0的整数解为()A.﹣1B.﹣3C.﹣4D.﹣510.(2分)如图,已知在Rt△ABC中,∠ABC=90°,点D是BC边的中点,分别以B、C为圆心,大于线段BC长度一半的长为半径画弧,两弧在直线BC上方的交点为P,直线PD交AC于点E,连接BE,则下列结论:①ED⊥BC;②∠A=∠EBA;③EB平分∠AED;④ED=AB中,一定正确的是()A.①②③B.①②④C.①③④D.②③④二、填空题(每小题3分,共30分)11.(3分)5的平方根是;的立方根为.12.(3分)某校男生、女生以及教师人数的扇形统计图如图所示,若该校师生的总人数为1500人,结合图中信息,可得该校教师人数为人.13.(3分)将直线y=2x+4向下平移5个单位后得到直线的表达式是.14.(3分)如图,∠A=∠E,AC⊥BE,AB=EF,BE=10,CF=4,则AC=.15.(3分)已知一个正数a的两个平方根是二元一次方程2x+y=1的一组解,则a的值为.16.(3分)如图,∠OAB=∠OBC=∠OCD=90°,AB=BC=CD=1,OA=2,则OD2=.17.(3分)如图,四边形ABCD是轴对称图形,直线AC是对称轴.如果∠BAD+∠BCD=220°,那么∠BAC+∠BCA=度.18.(3分)火车匀速通过隧道时,火车在隧道内的长度y(米)与火车行驶时间x(秒)之间的关系用图象描述如图所示,有下列结论:①火车的速度为30米/秒;②火车的长度为120米;③火车整体都在隧道内的时间为35秒;④隧道长度为1200米.其中正确的结论是.(把你认为正确结论的序号都填上)19.(3分)在平面直角坐标系xOy中,已知点P(1,﹣1),点Q在y轴上,△PQO是等腰三角形,则满足条件的点Q的坐标是.20.(3分)将矩形OABC置于平面直角坐标系中,点A的坐标为(0,4),点C 的坐标为(m,0)(m>0),点D(m,1)在BC上,将矩形OABC沿AD折叠压平,使点B的对应点E落在坐标平面内,当△ADE是等腰直角三角形时,点E的坐标为.三、解答题(共50分)21.(12分)(1)计算:①+(﹣)﹣1﹣20160;②﹣+|﹣3|.(2)解方程:①8(x+1)3=27;②(x﹣1)2=4.22.(7分)为了解中考体育科目训练情况,某县从全县九年级学生中随机抽取了部分学生进行了一次中考体育科目测试(把测试结果分为四个等级:A级:优秀;B级良好;C级及格;D级不及格),并将测试结果绘制成了如下两幅不完整的统计图.请根据统计图中的信息解答下列问题.(1)本次抽样测试的学生人数是.(2)图1中∠α的度数是多少度?并直接把图2条形统计图补充完整;(3)该县九年级学生3500名,如果全部参加这次中考体育科目测试,请你估计不及格的人数多少人?23.(7分)如图,在四边形ABCD中,AD∥BC,E是AB的中点,连接DE并延长交CB的延长线于点F,点G在边BC上,且∠GDF=∠ADF.(1)求证:△ADE≌△BFE;(2)连接EG,判断EG与DF的位置关系并说明理由.(3)求证:AD+BG=DG.24.(7分)如皋某乡镇决定对A、B两村之间的公路进行改造,并有甲工程队从A村向B村方向修筑,乙工程队从B村向A村方向修筑.已知甲工程队先施工3天,乙工程队再开始施工.乙工程队施工几天后因另有任务提前离开,余下的任务由甲工程队单独完成,直到公路修通.下图是甲乙两个工程队修公路的长度y(米)与施工时间x(天)之间的函数图象,请根据图象所提供的信息解答下列问题:(1)乙工程队每天修公路米.(2)分别求甲、乙工程队修公路的长度y(米)与施工时间x(天)之间的函数关系式.(3)若该项工程由甲、乙两工程队一直合作施工,需几天完成?25.(7分)某电器超市销售每台进价分别为200元、170元的A、B两种型号的电风扇,下表是近两周的销售情况:(进价、售价均保持不变,利润=销售收入﹣进货成本)(1)求A、B两种型号的电风扇的销售单价;(2)若超市准备用不多于5400元的金额再采购这两种型号的电风扇共30台,求A种型号的电风扇最多能采购多少台?(3)在(2)的条件下,超市销售完这30台电风扇能否实现利润为1400元的目标?若能,请给出相应的采购方案;若不能,请说明理由.26.(10分)问题背景:如图1:在四边形ABCD中,AB=AD,∠BAD=120°,∠B=∠ADC=90°,E,F分别是BC,CD上的点,且∠EAF=60°.探究图中线段BE,EF,FD之间的数量关系.小王同学探究此问题的方法是,延长FD到点G.使DG=BE.连结AG,先证明△ABE≌△ADG,再证明△AEF≌△AGF,可得出结论,他的结论应是;探索延伸:如图2,若在四边形ABCD中,AB=AD,∠B+∠D=180°,E,F分别是BC,CD上的点,且∠EAF=∠BAD,上述结论是否仍然成立,并说明理由;实际应用:如图3,在某次军事演习中,舰艇甲在指挥中心(O处)北偏西30°的A处,舰艇乙在指挥中心南偏东70°的B处,并且两舰艇到指挥中心的距离相等,接到行动指令后,舰艇甲向正东方向以60海里/小时的速度前进,舰艇乙沿北偏东50°的方向以80海里/小时的速度前进,1.5小时后,指挥中心观测到甲、乙两舰艇分别到达E,F处,且两舰艇之间的夹角为70°,试求此时两舰艇之间的距离.2015-2016学年江苏省南京外国语学校初二(上)期末数学试卷参考答案与试题解析一、选择题(每题2分,共20分)1.(2分)下列是轴对称图形的是()A.B.C.D.【解答】解:A、不是轴对称图形,不符合题意;B、不是轴对称图形,不符合题意;C、不是轴对称图形,不符合题意;D、是轴对称图形,符合题意.故选:D.2.(2分)2013年12月2日,“嫦娥三号”从西昌卫星发射中心发射升空,并于12月14日在月球上成功实施软着陆.月球距离地球平均为384401000米,用四舍五入法取近似值,精确到1000000米,并用科学记数法表示,其结果是()A.3.84×107米B.3.8×107米C.3.84×108米D.3.8×108米【解答】解:384401000米=3.84×108米.故选:C.3.(2分)某棉纺厂为了解一批棉花的质量,从中随机抽取了20根棉花纤维进行测量,其长度x(单位:mm)的数据分布如下表所示,则棉花纤维长度的数据在8≤x<32这个范围的频率为()A.0.8B.0.7C.0.4D.0.2【解答】解:在8≤x<32这个范围的频数是:2+8+6=16,则在8≤x<32这个范围的频率是:=0.8.故选:A.4.(2分)如图,把一个小球垂直向上抛出,则下列描述该小球的运动速度v(单位:m/s)与运动时间t(单位s)关系的函数图象中,正确的是()A.B.C.D.【解答】解:根据分析知,运动速度v先减小后增大.故选:B.5.(2分)如图,已知△ABC中,AB=AC,∠ADB=∠AEC,那么图中有()对全等三角形.A.1B.2C.3D.4【解答】解:∵∠A=∠A,∠ADB=∠AEC,AB=AC,∴△ABD≌△ACE(AAS)∴AD=AE,BD=EC,∠ABD=∠ACE,∵AB=AC,∴BE=CD,∵BC=CB,∴△BCE≌△CBD(SSS),∵∠EOB=∠DOC,∠EBO=∠DCO,BE=CD,∴△BOE≌△COD(AAS),故选:C.6.(2分)在平面直角坐标系中,若直线y=kx+b经过第一、二、四象限,则直线y=bx+k不经过的象限是()A.第一象限B.第二象限C.第三象限D.第四象限【解答】解:已知直线y1=kx+b经过第一、二、四象限,则得到k<0,b>0,那么直线y2=bx+k经过第一、三、四象限.即不经过第二象限;故选:B.7.(2分)若等腰三角形的周长是80cm,则能反映这个等腰三角形的腰长ycm与底边长xcm的函数关系式的图象是()A.B.C.D.【解答】解:根据题意,x+2y=80,所以,y=﹣x+40,根据三角形的三边关系,x>y﹣y=0,x<y+y=2y,所以,x+x<80,解得x<40,所以,y与x的函数关系式为y=﹣x+40(0<x<40),只有D选项符合.故选:D.8.(2分)如图,在Rt△ABC中,∠C=90°,AC=5 cm,BC=12 cm,∠CAB的平分线交BC于D,过点D作DE⊥AB于E,则△BDE的周长为()A.17B.18C.19D.20【解答】解:∵AD是∠CAB的平分线,∠C=90°,DE⊥AB,∴CD=DE,在Rt△ACD和Rt△AED中,,∴Rt△ACD≌Rt△AED(HL),∴AE=AC=5cm,由勾股定理得,AB==13cm,∴BE=AB﹣AE=13﹣5=8cm,∴△BDE的周长=BE+BD+CD=BE+BD+CD=BE+BC=8+12=20cm.故选:D.9.(2分)如图,直线y=﹣x+m与y=nx+4n(n≠0)的交点的横坐标为﹣2,则关于x的不等式﹣x+m>nx+4n>0的整数解为()A.﹣1B.﹣3C.﹣4D.﹣5【解答】解:当y=0时,nx+4n=0,解得x=﹣4,所以直线y=nx+4n与x轴的交点坐标为(﹣4,0),当x>﹣4时,nx+4n>0;当x<﹣2时,﹣x+m>nx+4n,所以当﹣4<x<﹣2时,﹣x+m>nx+4n>0,所以不等式﹣x+m>nx+4n>0的整数解为x=﹣3.故选:B.10.(2分)如图,已知在Rt△ABC中,∠ABC=90°,点D是BC边的中点,分别以B、C为圆心,大于线段BC长度一半的长为半径画弧,两弧在直线BC上方的交点为P,直线PD交AC于点E,连接BE,则下列结论:①ED⊥BC;②∠A=∠EBA;③EB平分∠AED;④ED=AB中,一定正确的是()A.①②③B.①②④C.①③④D.②③④【解答】解:根据作图过程可知:PB=CP,∵D为BC的中点,∴PD垂直平分BC,∴①ED⊥BC正确;∵∠ABC=90°,∴PD∥AB,∴E为AC的中点,∴EC=EA,∵EB=EC,∴②∠A=∠EBA正确;③EB平分∠AED错误;④ED=AB正确,故正确的有①②④,故选:B.二、填空题(每小题3分,共30分)11.(3分)5的平方根是;﹣的立方根为.【解答】解:5的平方根是±;﹣的立方根为.故答案为:,﹣.12.(3分)某校男生、女生以及教师人数的扇形统计图如图所示,若该校师生的总人数为1500人,结合图中信息,可得该校教师人数为120人.【解答】解:1500×(1﹣48%﹣44%)=1500×8%=120.故答案为:120.13.(3分)将直线y=2x+4向下平移5个单位后得到直线的表达式是y=2x﹣1.【解答】解:由“上加下减”的原则可知,直线y=2x+4向下平移5个单位后得到直线的表达式是:y=2x+4﹣5,即y=2x﹣1.故答案为:y=2x﹣1.14.(3分)如图,∠A=∠E,AC⊥BE,AB=EF,BE=10,CF=4,则AC=6.【解答】解:∵AC⊥BE,∴∠ACB=∠ECF=90°,在△ABC和△EFC中,,∴△ABC≌△EFC(AAS),∴AC=EC,BC=CF=4,∵EC=BE﹣BC=10﹣4=6,∴AC=EC=6;故答案为:6.15.(3分)已知一个正数a的两个平方根是二元一次方程2x+y=1的一组解,则a的值为1.【解答】解:根据题意,得x+y=0,又因为2x+y=1,所以,解得,因此a=12=1.故答案为:1.16.(3分)如图,∠OAB=∠OBC=∠OCD=90°,AB=BC=CD=1,OA=2,则OD2=7.【解答】解:由勾股定理可知OB=,OC=,OD=∴OD2=7.17.(3分)如图,四边形ABCD是轴对称图形,直线AC是对称轴.如果∠BAD+∠BCD=220°,那么∠BAC+∠BCA=110度.【解答】解:∵四边形ABCD是轴对称图形,直线AC是对称轴,∴∠BAC=∠DAC,∠BCA=∠DCA,∴∠BAC+∠BCA=(∠BAD+∠BCD),∵∠BAD+∠BCD=220°,∴∠BAC+∠BCA=×220°=110°,故答案为:110.18.(3分)火车匀速通过隧道时,火车在隧道内的长度y(米)与火车行驶时间x(秒)之间的关系用图象描述如图所示,有下列结论:①火车的速度为30米/秒;②火车的长度为120米;③火车整体都在隧道内的时间为35秒;④隧道长度为1200米.其中正确的结论是①③④.(把你认为正确结论的序号都填上)【解答】解:在BC段,所用的时间是5秒,路程是150米,则速度是30米/秒.故①正确;火车的长度是150米,故②错误;整个火车都在隧道内的时间是:45﹣5﹣5=35秒,故③正确;隧道长是:45×30﹣150=1200(米),故④正确.故答案是:①③④.19.(3分)在平面直角坐标系xOy中,已知点P(1,﹣1),点Q在y轴上,△PQO是等腰三角形,则满足条件的点Q的坐标是(0,﹣1)或(0,)或(0,﹣)或(0,﹣2).【解答】解:如图,∵点P(1,﹣1),∴OP==.①OP是底边时,点Q的坐标为(0,﹣1);②OP是腰时,点Q的坐标为(0,)或(0,﹣)或(0,﹣2);综上所述,点Q的坐标为(0,﹣1)或(0,)或(0,﹣)或(0,﹣2).故答案为:(0,﹣1)或(0,)或(0,﹣)或(0,﹣2).20.(3分)将矩形OABC置于平面直角坐标系中,点A的坐标为(0,4),点C 的坐标为(m,0)(m>0),点D(m,1)在BC上,将矩形OABC沿AD折叠压平,使点B的对应点E落在坐标平面内,当△ADE是等腰直角三角形时,点E的坐标为(0,1).【解答】解:∵四边形OABC为矩形,点A的坐标为(0,4),点D的坐标为(m,1),∴BD=3,∵将矩形OABC沿AD折叠压平,使点B的对应点E落在坐标平面内,∴AB=AE,BD=DE,∠ABD=∠AED=90°,∵当△ADE是等腰直角三角形时,AE=ED,∴AB=BD,∠BAD=45°,∴∠DAE=∠BAD=45°,∴E在y轴上,AB=BD=AE=DE=3,∴四边形ABDE是正方形,OE=1,∴点E的坐标为(0,1);故答案为:(0,1).三、解答题(共50分)21.(12分)(1)计算:①+(﹣)﹣1﹣20160;②﹣+|﹣3|.(2)解方程:①8(x+1)3=27;②(x﹣1)2=4.【解答】解:(1)①原式=6﹣2﹣1=3;②原式=﹣﹣3+3﹣=﹣﹣;(2)①∵8(x+1)3=27,∴(x+1)3=,则x+1=,解得x=;②∵(x﹣1)2=4,∴(x﹣1)2=16,则x﹣1=4或x﹣1=﹣4,解得x=5或x=﹣3.22.(7分)为了解中考体育科目训练情况,某县从全县九年级学生中随机抽取了部分学生进行了一次中考体育科目测试(把测试结果分为四个等级:A级:优秀;B级良好;C级及格;D级不及格),并将测试结果绘制成了如下两幅不完整的统计图.请根据统计图中的信息解答下列问题.(1)本次抽样测试的学生人数是40.(2)图1中∠α的度数是多少度?并直接把图2条形统计图补充完整;(3)该县九年级学生3500名,如果全部参加这次中考体育科目测试,请你估计不及格的人数多少人?【解答】解:(1)由题意可得,本次抽查的学生有:12÷30%=40(人),故答案为:40;(2)∠α的度数是:360°×=54°,C级人数为:40×35%=14,补全的条形统计图如右图所示;(3)由题意可得,不及格的人数为:3500×=700,答:不及格的有700人23.(7分)如图,在四边形ABCD中,AD∥BC,E是AB的中点,连接DE并延长交CB的延长线于点F,点G在边BC上,且∠GDF=∠ADF.(1)求证:△ADE≌△BFE;(2)连接EG,判断EG与DF的位置关系并说明理由.(3)求证:AD+BG=DG.【解答】解:(1)如图1,∵E是AB的中点,∴AE=BE,∵AD∥BC,∴∠A=∠ABF,∠ADE=∠F,∴△ADE≌△BFE;(2)如图2,EG⊥DF,理由是:∵∠ADF=∠F,∠ADF=∠GDF,∴∠F=∠GDF,∴DG=FG,由(1)得:△ADE≌△BFE,∴DE=EF,∴EG⊥FD;(3)如图2,由(1)得:△ADE≌△BFE,∴AD=BF,∵FG=BF+BG,∴FG=AD+BG,∵FG=DG,∴AD+BG=DG.24.(7分)如皋某乡镇决定对A、B两村之间的公路进行改造,并有甲工程队从A村向B村方向修筑,乙工程队从B村向A村方向修筑.已知甲工程队先施工3天,乙工程队再开始施工.乙工程队施工几天后因另有任务提前离开,余下的任务由甲工程队单独完成,直到公路修通.下图是甲乙两个工程队修公路的长度y(米)与施工时间x(天)之间的函数图象,请根据图象所提供的信息解答下列问题:(1)乙工程队每天修公路120米.(2)分别求甲、乙工程队修公路的长度y(米)与施工时间x(天)之间的函数关系式.(3)若该项工程由甲、乙两工程队一直合作施工,需几天完成?【解答】解:(1)由图象可得,乙工程队每天修路:720÷(9﹣3)=720÷6=120(米),故答案为:120;(2)设y乙=kx+b,则,解得,,∴y乙=120x﹣360,当x=6时,y乙=360,设y甲=k1x,∵y乙与y甲的交点是(6,360),∴360=6k1,解得k1=60,∴y甲=60x;(3)当x=15时,y甲=900,∴该公路总长为:720+900=1620(米),设该项工程由甲、乙两工程队一直合作施工,需x天完成,(120+60)x=1620,解得,x=9,答:该项工程由甲、乙两工程队一直合作施工,需9天完成.25.(7分)某电器超市销售每台进价分别为200元、170元的A、B两种型号的电风扇,下表是近两周的销售情况:(进价、售价均保持不变,利润=销售收入﹣进货成本)(1)求A、B两种型号的电风扇的销售单价;(2)若超市准备用不多于5400元的金额再采购这两种型号的电风扇共30台,求A种型号的电风扇最多能采购多少台?(3)在(2)的条件下,超市销售完这30台电风扇能否实现利润为1400元的目标?若能,请给出相应的采购方案;若不能,请说明理由.【解答】解:(1)设A、B两种型号电风扇的销售单价分别为x元、y元,依题意得:,解得:,答:A、B两种型号电风扇的销售单价分别为250元、210元;(2)设采购A种型号电风扇a台,则采购B种型号电风扇(30﹣a)台.依题意得:200a+170(30﹣a)≤5400,解得:a≤10.答:超市最多采购A种型号电风扇10台时,采购金额不多于5400元;(3)依题意有:(250﹣200)a+(210﹣170)(30﹣a)=1400,解得:a=20,∵a≤10,∴在(2)的条件下超市不能实现利润1400元的目标.26.(10分)问题背景:如图1:在四边形ABCD中,AB=AD,∠BAD=120°,∠B=∠ADC=90°,E,F分别是BC,CD上的点,且∠EAF=60°.探究图中线段BE,EF,FD之间的数量关系.小王同学探究此问题的方法是,延长FD到点G.使DG=BE.连结AG,先证明△ABE≌△ADG,再证明△AEF≌△AGF,可得出结论,他的结论应是EF=BE+FD;探索延伸:如图2,若在四边形ABCD中,AB=AD,∠B+∠D=180°,E,F分别是BC,CD上的点,且∠EAF=∠BAD,上述结论是否仍然成立,并说明理由;如图3,在某次军事演习中,舰艇甲在指挥中心(O处)北偏西30°的A处,舰艇乙在指挥中心南偏东70°的B处,并且两舰艇到指挥中心的距离相等,接到行动指令后,舰艇甲向正东方向以60海里/小时的速度前进,舰艇乙沿北偏东50°的方向以80海里/小时的速度前进,1.5小时后,指挥中心观测到甲、乙两舰艇分别到达E,F处,且两舰艇之间的夹角为70°,试求此时两舰艇之间的距离.【解答】解:问题背景:∵小王同学探究此问题的方法是,延长FD到点G.使DG=BE.连结AG,先证明△ABE≌△ADG,再证明△AEF≌△AGF,∴EF=FG,FG=FD+DG=FD+BE,∴EF=BE+FD,故答案为:EF=BE+FD;探索延伸:上述结论EF=BE+FD成立,理由:如图2,延长FD到点G,使得DG=BE,连接AG,∵∠B+∠ADC=180°,∠ADG+∠ADC=180°,∴∠B=∠ADG,∵AB=AD,∴△ABE≌△ADG(SAS),∴AE=AG,∠BAE=∠DAG,∵∠EAF=∠BAD,∴∠GAF=∠DAG+∠DAF=∠DAF+∠BAE=∠BAD﹣∠EAF=∠BAD,∴∠GAF=∠EAF,又∵AG=AE,AF=AF,∴△AFG≌△AFE(SAS),∴EF=GF,∵GF=DF+DG=DF+BE,∴EF=BE+FD;如图3,连接EF,延长AE、BF相交于点C,在四边形AOBC中,∵∠AOB=30°+90°+(90°﹣70°)=140°,∠FOE=70°=,又∵OA=OB,∠OAC+∠OBC=(90°﹣30°)+(70°+50°)=60°+120°=180°,∴图3符合探索延伸的条件,∴EF=AE+FB=1.5×(60+80)=210(海里),即此时两舰艇之间的距离210海里.附赠:初中数学考试答题技巧一、答题原则大家拿到考卷后,先看是不是本科考试的试卷,再清点试卷页码是否齐全,检查试卷有无破损或漏印、重印、字迹模糊不清等情况。
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2015-2016 南外初一期末测试卷Ⅰ.听力(略)Ⅱ.Multiple choice(选择填空)(0.5%×20=10%)21. At Halloween, Ella_______a while rabbit and _______sweets from door to door.A. dressed up in; to askB. dressed up as; asked forC. was dressed in; asking forD. was dressed as; to ask for22. --- Excuse me, could you tell me _______?--- Sure! Bus No. 9 will take you there directly.A.Where in Nanjing MuseumB. how can I get to Nanjing MuseumC. which bus I shall take to Nanjing MuseumD. is Nanjing Museum near here23. Daniel spent _______hour on his letter, but he still made a spelling mistake. He dropped ______ “m”in the word swimming.A. an; theB. an; anC. a; aD. a; the24. which of the following is CORRECT according tickets the text?A. In some parts of Britain, the sea is eating about six meters of coast every year.B. The air near the ground is warm because the sun heats the air directly.C. The light from the sun comes to us in four and a half years.D. We have tides only because the moon pulls the sea.25. ---______do you think of adele’s new song Hello?----______,but I like Taylor’s songs better.A.What; I don’t mind itB. How; I don’t like itC. What; it’s my favoriteD. How; I hate it26. which of the following has a different meaning from the other three ?A. Our classroom is four times as big as their classroom.B. Our classroom is four times the size of their classroom.C. their classrrom is four times smaller than our classroom.D. Our classroom is a quarter of the size of their classroom.27. --- does this blouse _______me ?----I think it is OK and I suggest you should buy a red skirt to _______the blouse.A. fit; matchB. fit; fitC. match; fitD.match; match28. which sentence is wrong according to the text?A.there are fifteen types of vitamins(A,B,C,and so on )B.if the moon goes between the Earth and the Sun, we have an eclipse of the sun.C.in the winter, the very strong winds and high tides eat parts of BritainD.it is very cold in the sky. Winter vapour becomes clouds.29. smog is getting ______these days. We are wondering why this has ______.A. bad and bad; happenedB. badly and badly ;taken placeC. worse and worse ; been taken placeD. worse and worse ;happened30. look! This is the ______new car .they bought it for ______dollars.A. blacks’ ;twenty thousandsB. black’s ; twenty thousandC. black’s ;twenty thousandD.black’s; twenty thousands31. one of our English teathers is going to give birth to a baby, so anther will come to _______.A. take her placeB. take place of herC. instead of herD. be instead of her32. which group of words are not a pair of oppsite(反义词)?A. always ; neverB. push; pullC. sunny ; windyD. upstairs,downstairs33. the sea is improtant in Britain because a lot of Britain’s oil and gas _______from the sea , and there are many important ports ________the coast.A. comes; inB. comes;ones ; ines;on34. which word doesn’t stress(重读)the first syllable(音节)?A. sunlightB. carbohydrateC. pancakeD. curtain35.---where is Jack?---he is watchig a movie on the third floor.---can you go _____and ask him to come down _______supper?A.upstairs;toB. to upstairs;forC.upstairs;forD.to uostairs;to36. I want to buy a single ticket to Shanghai and I want to know the cost of the ticket. Which of the following expressions is WRONG?A. what’s the pric e of a single ticket to Shanghai?B. How much is a single ticket to Shanghai?C. How much does it take me to buy a ticket to Shanghai?D. How much does a single ticket to Shanghai cost?37. In the following words, we can spell the words without “u” Amer ican English except the word “_________”.A.favoriteB.vapourC. neighbourD.yours38. ---- Wow,what a beautiful scarf! Is it made _______silk? Can I _______?A.of; try on itB.of; try it onC. from; try on itD.from; try it on39. 90% of shipbuilding in our company ________on the coast of China and 30% of the workers________well-educated.A. are ;isB. is; areC.is; isD. are ;are40. ---It’s too hot. Do you mind_______the door?----________. Go ahead.A.to open;OKB.my opening; Certainly notC.opening; Of courseD.to open;Good ideaⅢ. Find out the incorrect one from the four underlined parts.(从下列四个选项中选出有错的一个)(0.5%×10=5%)41. ---Your hometown looks fantastic in the photo. How is the weather like over there?A B---It’s often warm and sunny in autumn and it’s not hot in summer or too cold in winter.C D42. When the leaves in the ginkgo(银杏)trees on our campus(校园)go yellow and fall off, the groundA B Cbelow seems to be covered with golden carpets.D43. Great changes are taking place in many big cities like Nanjing, my hometown, which is gettingA Bmoderner and moderner than ever before.C D44. Dalian, a northeatern city of China, lies by sea. If you travel in the city, you can not only enjoy theA Bscenery but also taste the delicious seafood.C D45. There are lots of exciting activities you can try in the national Parks. You can go canoing, camping,A B C Dclimbing, and so on.46. There aren’t many Giant Pandas in the forests in Sichuan, so we must try to build up as many naturalA B Creserves(自然保护区)as possible to stop them to get harmed.D47. ---Can you tell me how much snow do you have in December?A B---Not very much in December, but a lot in January.C D48. It is much chilly in York than in Cambridge in winter. You had better bring some thick clothes withA B Cyou while travelling there.D49. There probably has no life on the moon because there is no air on it and it is very hot during the dayA B C Dand very cold at night.50. ---We would like some spaghetti and some wine.A---Sorry, we don’t have got any at the moment. It’s time for us to close the café.B C DⅣ.Cloze test (完形填空)(1%×10=10%)Who designed(设计)the first helicopter? Who ______one of the most famous pictures in the world? Who knew more about the human body than most ______? There is an answer ______all these questions--- Leonardo de Vinci(达芬奇). Leonardo may have been the greatest genius(天才)______have ever known. He lived in Italy around the year 1500, but many of his inventions seem mmodern to us today. For example,one of his notebooks has drawings of a helicopter. Of caurse, he couldn’t _______a helicopter with the things he had. But scientists say his idea would have worked.But Leonardo _______an inventor. He was one of the greatest artists of his day. By the time he was twenty years old, he was called a master(大师)painter, and as he got older he became______more famous. Sometimes he drew a hand ten different ways_______he was ready to paint.Many of Leonardo’s wonderful paintings are still with _______today. You may know one of his most famous works the _______woman known as the Mona Lisa.51. A. took B. made C. painted D. invented52. A. artists B. doctors C. painters D. people53. A. to B. of C. for D.from54. A. the scientists B. the artists C. the world D. people55. A. draw B. paint C. work D.build56. A. was just B. wasn’t just C. wasn’t D. was no longer57. A. less B. no C. even D. very58. A. before B. after C. bucause D. when59. A. him C. them D. you60. A. interesting B. crying C.smiling D. surprisingⅤ. Reading comprehension(阅读理解)(1%×15=15%)AAccident Report Form61. What time did Mrs. Green call the police?A. At 9:30 a.m.B. At 9:30 p.m.C. At 9:40 p.m.D. At 9:45 p.m.62.Whose left leg was hurt?A.Mrs.Green’sB.Their dauther’sC.Mr.Green’sD.Their friends’63.What was the weather like that day?A.It was sunnyB.It was rainyC.It was cloudyD.It was snowy64.Which of the following is TRUE?A.The car crashed into a wallB.Their daughter hurt her leg and was sent to the hospitalC.The car accident happened on Zhongshan Road in NanjingD.The policemen arrived half an hour later and sent the victims to the hospitalBThe world is not hungry,but it is thirsty.It seems strange that nearly 3/4 of the earth is covered with water while we say we are short of(短缺)water.Why?Because about 97% of water on the earth is sea water which we can't drink or use for watering plants directly(直接地).Man can only drink and use the 3% of the water that comes from rivers and lakes.And we can't even use all of that,because some of it has been polluted(污染).Now more water is needed.The problem is:Can we avoid(避免)a serious water shortage later on?Firstly,we should all learn how to save water.Secondly,we should find out the ways to reuse it.Scientists have always been making study in this field.Today,in most large cities,water is used only once and then runs to the sea or rivers.But it can be used again.Even if(即使)every large city reused its water,still there would not be enough.What could people turn to next?The sea seems to have the best answer.There is a lot of water in the sea.All that needs to be done is to get the salt(盐)out of the sea water.This is expensive,but it's already in use in many parts of theworld.Scientists are trying to find a cheaper way to do it.So you see,if we can find a way out,we'll be in no danger of drying up.65. The world is thirsty because __A.3/4 of the earth is covered with water.B.we have enough sea water to use directly.C.we haven’t used all the water in rivers and lakes.D.about 97% of water on the earth can’t be drunk or used for watering plants directly.66.Which of the following is TRUE?A.3% of water on the earth is sea waterB.75% of water on the earth is the seaC.3% of water on the earth is in rivers and lakesD.97% of the earth is covered with water67.To avoid the serious water shortage,which of the following is the most important ?A.Save water and try to make good use of the water in rivers and lakes.B.Don’t pollute water and keep all rivers and lakes clean.C.Make dirty water clean and then reuse it.D.Try to find a cheaper way to get the salt out of the sea water.68.The title of the passage would be __?A.The Sea WaterB.How to Save WaterC.The Thiraty WorldD.The Polluted WaterCDo you sleep well? If your answer is no, the following might help you.Set a certain bedtime and rising timeA certain bedtime and rising time can help you build up your body clocks. Set a bedtime which is good and natural for you. Don’t change your bedtime and rising time on weekends.Avoid exciting activities just before sleepingExciting activities get your thoughts running. At the same time, if y ou make tomorrow’s plan or read an exciting story before turning off the light, it doesn’t give you enough time to relax before you try to sleep. Keep the bedroom for sleeping onlyIt’s a bad habit for you to use your bedroom as a place to eat, watch TV, read, talk on the phone, or discuss important matters with your family members. Break that habit to get better sleep.Don’t go to bed too earlyYour body usually lets you sleep only the number of hours it needs. You should decide how many hours you must sleep in order not to experience daytime sleepiness.Take a warm shower before your bedtimeA twenty-minute warm shower at a temperature o f about 45 –50 not only is a great relax at day’s end, but also raises your body temperature by several degrees. The coming drop in temperature of your body will naturally make you feel sleepy.69. You should ______to build up your body clocks.A. set a certain bedtime and rising timeB. go to bed neither too early nor too lateC. keep the bedroom for slepping onlyD. take a warm shower before sleeping70.Which is NOT mentioned(提及) in the passage?A.Exciting activities can get your thoughts runningB.Making tomorrow’s plan before sleeping is a good habit.C.Reading an exciting story doesn’t help you to sleepD.Bedrooms shouldn’t be the place for eating if you want b etter sleep71. According to the passage,__will make you feel sleepyA.taking a cold showerB.your body temperature droppingC.your daily experienceD.raising your body temperatureDParents often believe that they have a good relationship with their teenagers (青少年). But last summer vocation in 2001, Joanna and Henry noticed a change in their elder son: suddenly he seemed to be talking far more to his friends than to his parents. "The door to his room is always shut." Joanna noted.Tina and Mark noticed similar changes in their 14-year-old daughter. "She used to cuddle up (蜷伏) with me on the sofa and talk," said Mark. "Now we joke that she does this only when she wants something, Sometimes she wants to be treated like a little girl and sometimes like a young lady. The problem is figuring out which time is which."Before age 11, children like to tell their parents what's on their minds. "In fact, parents are first on the list." said Michael Riera, author of Uncommon Sense for Parents with Teenagers. "This completely changes during the teen years." Riera explained. "They talk to their friends first, then maybe their teachers, and their parents last." Parents who know what's going on in their teenagers'(青少年)lives are in the best position(位置)to help them. To break down the wall of silence, parents should create chances to understand what their children want to say, and try to find ways to talk and write to them. And they must give their children a mental break, for children also need freedom, though young. Another thing parents should remember is that to be a friend, not a manager(老板), with their children is a better way to know them.72."The door to his room is always shut" suggests that the son _______.A.is busy with his homeworkB.doesn’t want to talk to his parentsC.needs same sleepD.is too tired73.What troubles Tina and Mark most is that their daughter_______.A.talks little in classB.asks for too much moneyC.only talks to her best friendD.talks with them only when she wants something74.”The wall of silence”in the last paragraph(段落) means_______.A.children do not talk much with their parentsB.parents only ask their children to study hardC.parents always sit silently with their childrenD. children need free time to get themselves relaxed75.According to the passage,what advice does the writer give to parents?A.Be a manager with your childrenB.Never talk too much to your childrenC.Be a friend with your childrenD.Give you children whatever they want第二卷(满分50分)VI.Vocabulary 20%A.Write the words according to the phonetic symbols and complete the sentences with the correct forms.(看音标写单词,并用词的正确形式填入句子)(0.5%X10=5%)1.Dengchao is one of__________/ˈpɒpjələ(r)/ film stars in the receaction(娱乐) programme Running Brothers.This week’s porgramme will attract more TV audience(观众) 把cause hie wife ,Sun Li,will take part in as well.2.I heard that Jim got an “A” in the English exam and he __________/si:m/ to be very happy that day.Is that ture?3.The day before yesterday,Mary and John __________/ˈɔ:də/a bottle of champagne(香槟) for themsleves in a western restayrant to celebrate their 20th wedding anniversary.4.To study better,you should try to be an active listener in class.The __________/ˈleɪzi/you are,the worse the exam results(成绩) may be.5.The __________/skɑ:f/in the shop are a bit cheaper than the ones in that shop but not as good.Let’s go to the shop.6.The __________/ˈwɔ:təmelən/is a kind of fruit to eat in summer.It is said it can clean the body from thein side.But I don’t think having too much is good for our health.7.When you take a walk or do sports,you had better wear sports shoes because they are very __________/ˈkʌmftəbl/8.More and more shopping __________/mɔ:l/have been set up around communities(社区),so it’s convenient(方便) for people nearby to go shopping.9.The winter solstice(冬至) falls on December 22th this year.As usual,people in China usually eat __________/ˈdʌmplɪŋ/and rice glue balls for dinner.10.My grandpa prefeers oranges and grapes to other fruits.So I am going to buy two __________/ˈki:ləʊ/of each king for him.B Complete each sentence.The first letter of the word is given.(根据所给的单词首字母完成句子)(0.5%X10=5%)1.Some people like c__________stamps and coins while others are interested in key rings,buttons,even furniture ans so on.2.Egypt is well-known throughout the world because of its brillant ancient civilization(文明) and its musterious(神秘的)p__________,which attract large numbers of scientists and tourists every year.3.The c__________of the new ye ar 2016 shows that the Chinese New Year’s Eve falls on February 7th,which is the time for the family to have a big dinner together at home or at a restaurant.4.It’s safer for people in Nanjing to wait for the undergroung because there are glass barriers b etween the railways and the p__________ .5.It is a long way from Nanjing to Beijing and it will be a tiring journey to go there by car.We three will take t __________driving on the way so that we won’t get tired for driving too long.6.Spaghetti is a type of p __________in the shape of long thin pieces that look string,and the way to cook it is different from that of Chinese noddles.7.My father has a m __________clock from Qing dynasty(朝代).It suddenly stopped the other day.My father is now looking for a place to have it repaired.8.In winter,some animals h__________,including bears,frogs and snakes.I wonder if polar bears sleep all year round(终年) in the Arctic Circle because it’s extremely chilly there.9.If you go to a village in the mountains in the late afternoon,you can often see smoker__________from chimneys of the farm houses.It’s time for people to cook dinner after a hard day working in the fields.10.China has become one of the most p__________countries in the world because of its fast development(发展)in science and technology,and it is palying an important role in the world’s peace.C.Fill in each blank with the proper form of the given word.(用所给单词的适当形式完成句子。