杨浦区2017年一模手敲Word版附答案

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(完整word版)2017年上海杨浦区初三一模语文试题(附答案)

(完整word版)2017年上海杨浦区初三一模语文试题(附答案)

(完整word版)2017年上海杨浦区初三一模语文试题(附答案)亲爱的读者:本文内容由我和我的同事精心收集整理后编辑发布到文库,发布之前我们对文中内容进行详细的校对,但难免会有错误的地方,如果有错误的地方请您评论区留言,我们予以纠正,如果本文档对您有帮助,请您下载收藏以便随时调用。

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最后最您生活愉快 ~O(∩_∩)O ~2017年杨浦区初三一模语文试题一、文言文阅读(共40分)(一)默写(15分)1、昨夜江边春水生,。

(《观书有感(其二)》)2、,五十弦翻塞外声。

(《破阵子·为陈同甫赋壮词以寄》)3、,雪尽马蹄轻。

(《观猎》)4、六十而耳顺,,。

(《孔孟论学》)5、若夫日出而林霏开,。

(《醉翁亭记》)(二)阅读下面的词,完成6-7题(4分)江城子·密州出猎(宋)苏轼老夫聊发少年狂。

左牵黄,右擎苍。

锦帽貂裘,千骑卷平冈。

为报倾城随太守,亲射虎,看孙郎。

酒酣胸胆尚开张。

鬓微霜,又何妨?持节云中,何日遣冯唐?会挽雕弓如满月,西北望,射天狼。

6、词中的“卷”字,既写出了出猎场面的,更表现了出猎者的精神面貌。

(2分)7、下列对这首词理解恰当的一项是()(2分)A.本词开篇“聊”“狂”两字,虽隐有怨愤之情,但更多见作者豪迈气概。

B.本词中词人以孙权、冯唐自比,表达了期盼得到朝廷重用的强烈愿望。

C. 本词结句卒章显志,传神描绘了作者驰骋于沙场,为国杀敌的英雄形象。

D. 本词表面写的是一次秋猎,实则表达了词人报效国家的志向和豪迈气概。

(三)阅读下文完成8-10题(9分)黔之驴①黔无驴,有好事者船载以入。

至则无可用,放之山下。

虎见之,庞然大物也,以为神,蔽林间窥之。

稍出近之,慭慭然莫相知。

②他日,驴一鸣,虎大骇,远遁;以为且噬己也,甚恐。

然往来视之,觉无异能者;益习其声,又近出前后,终不敢搏。

稍近,益狎,荡倚冲冒。

驴不胜怒,蹄之。

虎因喜,计之曰:“技止此耳!”因跳踉大㘎,断其喉,尽其肉,乃去。

杨浦区初三英语一模卷及答案

杨浦区初三英语一模卷及答案

杨浦区2017学年度第一学期期末质量调研之勘阻及广创作(满分:150 分,考试时间: 150分钟)考生注意:本卷有7大题。

共94 小题。

试题均采取连续编号,所有答案务必依照规定在答题纸上完成,做在试卷上不给分。

Part 2 Phonetics, Grammar and vocabulary(第二部分语音、语法和词汇)II. Choose the best answer( 选择最恰当的答案) : (共20分) 26. Which of the following underlined parts is different in pronunciation?A. methodB. enemyC. memoryD. recent27. The main purpose of international laws of war is to protect ________ innocent.A. aB. an C . the D. /28. Sue’s still very angry _______ me for forgetti ng her birthday.A. forB. toC. withD. by29. The world’s smallest lizard has been discovered ________ a small Caribbean island.A. onB. inC. forD. at30. At night, it’s __________ on the farm than it is in the city.A. darkB. darkerC. darkestD. the darkest31. Did Professor Li give you some ________ about the exam?A. skillB. pointC. opinionD. advice32. You _______ tired. You should get some rest.A. hearB. soundC. listenD. listen to33. Volunteers help with research and animal rescue, and they teach _______ about sea life.A. otherB. othersC. the otherD. another34. --________ the Shanghai World Financial Center?--It is 492 meters.A. How longB. How farC. What sizeD. Howtall35. If I _______ too much coffee, I have to run to the bathroom all day long.A. drinkB. am drinkingC. drankD. will drink36. Don’t forget the user name and password ______you won’t be able to sign in.A. orB. butC. andD. so37. The suspect’s friend denies _______him destroy evidence.A. helpB. helpedC. helpingD. to help38. The government made a promise _______ medical care and social security strong.A. keepB. to keepC. keepingD. to keeping39. Big TV’s aren’t popular today _______ most people watch shows on their phones.A. even ifB. so thatC. becauseD. as long a s40. A woman who fell 10 meters from High Peak _______ to safety by a helicopter.A. liftedB. is liftedC. was liftingD. was lifted41. We shouldn’t put metal in the microwave. It _______ start a fire.A. canB. shouldC. mustD. need42. By the time I found the website, they _______ all the tickets.A. are sellingB. have soldC. had soldD. will sell43. This method is rarely used in modern laboratories,_________?A. is itB. isn’t itC. did itD. didn’t it44. –I’m sorry I was at a meeting all morning. I just didn’t have time to write the report.-- _______ But I need it this week.A. How terribleB. That’s OKC. I’m not sureD. I’m sorry to hear that45. –I think it’s a good idea to volunteer somewhere before college.--________. It’s a great experience.A. Not at presentB. Are you kidding?C. I don’t think soD. I suppose you’re rightIII. Complete the following passage with the words or phrases in the box. Each word or phrase can only be used once.(将下列单词或词组填入空格。

2017上海市杨浦区初三一模和二模语文试题及答案解析

2017上海市杨浦区初三一模和二模语文试题及答案解析

2017上海市杨浦区初三⼀模和⼆模语⽂试题及答案解析2016年杨浦区初三⼀模语⽂试题⼀、⽂⾔⽂阅读(共39分)(⼀)默写(15分)1、当年万⾥觅封侯,__ 。

(《诉衷情》)2、____________,五⼗弦翻塞外声。

(《破阵⼦·为陈同甫赋壮词以寄之》)3、_______________,带⽉荷锄归。

(《归园⽥居》)4、舜发于畎亩之中,____ _____。

(《⽣于忧患,死于安乐》)5、盖⼀岁之犯死者⼆焉,__ ______。

(《捕蛇者说》)(⼆)阅读【甲】【⼄】两⾸词曲,完成6-7题(4分)【甲】蝶恋花柳永伫倚危楼风细细。

望极春愁,黯黯⽣天际。

草⾊烟光残照⾥,⽆⾔谁会凭阑意。

拟把疏狂图⼀醉。

对酒当歌,强乐还⽆味。

⾐带渐宽终不悔。

为伊消得⼈憔悴。

【⼄】四块⽟·别情关汉卿⾃送别,⼼难舍,⼀点相思⼏时绝?凭阑袖拂杨花雪。

溪⼜斜,⼭⼜遮,⼈去也!7、下⾯对两⾸词曲的理解不恰当的⼀项是()(2分)A.两⾸词曲都景中含情,蕴含了词⼈的愁绪。

B.两⾸词曲都借春景抒发主⼈公内⼼的感受。

C.两⾸词曲都先绘景后抒情,做到了情景交融。

D.两⾸词曲都描摹了凭栏远眺的主⼈公的形象。

(三)阅读下⽂完成8——10题(8分)……“⽆或乎王之不智也。

虽有天下易⽣之物也,⼀⽇暴之,⼗⽇寒之,未有能⽣者也。

吾见亦罕矣,吾退⽽寒之者⾄矣,吾如有萌焉何哉?今夫弈之为数,⼩数也;不专⼼致志,则不得也。

弈秋,通国之善弈者也。

使弈秋诲⼆⼈弈,其⼀⼈专⼼致志,惟弈秋之为听。

⼀⼈虽听之,⼀⼼以为有鸿鹄将⾄,思援⼸缴⽽射之,虽与之俱学,弗若之矣。

为是其智弗若与?⽈:⾮然也。

”89、⽤现代汉语翻译下⾯的句⼦。

(3分)⼀⽇暴之,⼗⽇寒之,未有能⽣者也10、选⽂设喻说理,告诉我们深刻的道理。

下列观点不是选⾃选⽂的⼀项是()(3分)A.为⼈处事贵在向善有恒,半途⽽废必将远善失道。

B.即使对待⼩技艺(⼩数)也应加以重视,认真研究。

C.为学必须杜绝三⼼⼆意,专⼼致志才能学有成就。

2017年上海市杨浦区高考数学一模试卷带解析【精品】

2017年上海市杨浦区高考数学一模试卷带解析【精品】

第1页(共17页)页)2017年上海市杨浦区高考数学一模试卷一、填空题(本大题满分54分)共12小题,1-6题每题4分,7-12题每题5分 1.(4分)若“a >b ”,则“a 3>b 3”是命题(填:真、假) 2.(4分)已知A =(﹣∞,0],B =(a ,+∞),若A ∪B =R ,则a 的取值范围是 .3.(4分)z +2=9+4i (i 为虚数单位),则|z |= .4.(4分)若△ABC 中,a +b =4,∠C =30°,则△ABC 面积的最大值是 .5.(4分)若函数f (x )=log 2的反函数的图象经过点(﹣2,3),则a = . 6.(4分)过半径为2的球O 表面上一点A 作球O 的截面,若OA 与该截面所成的角是60°,则该截面的面积是 .7.(5分)抛掷一枚均匀的骰子(刻有1,2,3,4,5,6)三次,得到的数字依次记作a ,b ,c ,则a +bi (i 为虚数单位)是方程x 2﹣2x +c =0的根的概率是 .8.(5分)设常数a >0,(x +)9展开式中x 6的系数为4,则(a +a 2+…+a n)= .9.(5分)已知直线l 经过点且方向向量为(2,﹣1),则原点O 到直线l 的距离为 .10.(5分)若双曲线的一条渐近线为x +2y =0,且双曲线与抛物线y =x 2的准线仅有一个公共点,则此双曲线的标准方程为 .11.(5分)平面直角坐标系中,给出点A (1,0),B (4,0),若直线x +my ﹣1=0存在点P ,使得|P A |=2|PB |,则实数m 的取值范围是 . 12.(5分)函数y =f (x )是最小正周期为4的偶函数,且在x ∈[﹣2,0]时,f (x )=2x +1,若存在x 1,x 2,…x n 满足0≤x 1<x 2<…<x n ,且|f (x 1)﹣f (x 2)|+|f (x 2)﹣f (x 1)|+…+|f (xn ﹣1﹣f (x n ))|=2016,则n +x n的最小值为 .二、选择题(本大题共4题,满分20分)13.(5分)若与﹣都是非零向量,则“•=•”是“⊥(﹣)”的( )A .充分但非必要条件B .必要但非充分条件C .充要条件D .既非充分也非必要条件14.(5分)行列式中,元素7的代数余子式的值为( ) A .﹣15B .﹣3C .3D .1215.(5分)一个公司有8名员工,其中6名员工的月工资分别为5200,5300,5500,6100,6500,6600,另两名员工数据不清楚,那么8位员工月工资的中位数不可能是( ) A .5800 B .6000C .6200D .640016.(5分)若直线+=1通过点P (cos θ,sin θ),则下列不等式正确的是( ) A .a 2+b 2≤1 B .a 2+b 2≥1C .+≤1D .+≥1三、解答题(满分76分)共5题17.(14分)某柱体实心铜制零件的截面边长是长度为55毫米线段AB 和88毫米的线段AC 以及圆心为P ,半径为PB 的一段圆弧BC 构成,其中∠BAC =60°.(1)求半径PB 的长度;(2)现知该零件的厚度为3毫米,毫米,试求该零件的重量试求该零件的重量试求该零件的重量(每(每1个立方厘米铜重8.9克,按四舍五入精确到0.1克).V 柱=S 底•h .18.(14分)如图所示,l 1,l 2是互相垂直的异面直线,MN 是它们的公垂线段,点A ,B 在直线l 1上,且位于M 点的两侧,C 在l 2上,AM =BM =NM =CN (1)求证:异面直线AC 与BN 垂直;(2)若四面体ABCN 的体积V ABCN =9,求异面直线l 1,l 2之间的距离.19.(14分)如图所示,椭圆C:+y2=1,左右焦点分别记作F1,F2,过F1,F2分别作直线l1,l2交椭圆AB,CD,且l1∥l2.(1)当直线l 1的斜率k1与直线BC的斜率k2都存在时,求证:k1•k2为定值;(2)求四边形ABCD面积的最大值.20.(14分)数列{a n},定义{△a n}为数列{a n}的一阶差分数列,其中△a n=a n+1﹣a n(n∈N*)(1)若a n=n2﹣n,试判断{△a n}是否是等差数列,并说明理由;(2)若a1=1,△a n﹣a n=2n,求数列{a n}的通项公式;(3)对(b)中的数列{a n},是否存在等差数列{b n},使得b1C+b2C+…+b n C =a n,对一切n∈N*都成立,若存在,求出数列{b n}的通项公式,若不存在,请说明理由.21.(20分)对于函数f(x)(x∈D),若存在正常数T,使得对任意的x∈D,都有f(x+T)≥f(x)成立,我们称函数f(x)为“T同比不减函数”.(1)求证:对任意正常数T,f(x)=x2都不是“T同比不减函数”;(2)若函数f(x)=kx+sin x是“同比不减函数”,求k的取值范围; (3)是否存在正常数T,使得函数f(x)=x+|x﹣1|﹣|x+1|为“T同比不减函数”;若存在,求T的取值范围;若不存在,请说明理由.2017年上海市杨浦区高考数学一模试卷参考答案与试题解析一、填空题(本大题满分54分)共12小题,1-6题每题4分,7-12题每题5分 1.(4分)若“a>b”,则“a3>b3”是 真 命题(填:真、假)【解答】解:函数f(x)=x3在R是单调增函数,∴当a>b,一定有a3>b3,故是真命题答案为:真.2.(4分)已知A=(﹣∞,0],B=(a,+∞),若A∪B=R,则a的取值范围是 a≤0. .【解答】解:若A∪B=R,A=(﹣∞,0],B=(a,+∞),必有a≤0;故答案为:a≤0.3.(4分)z+2=9+4i(i为虚数单位),则|z|= 5 .【解答】解:设z=x+yi(x,y∈R),∵z+2=9+4i,∴x+yi+2(x﹣yi)=9+4i,化为:3x﹣yi=9+4i,∴3x=9,﹣y=4,解得x=3,y=﹣4.∴|z|==5.故答案为:5.4.(4分)若△ABC中,a+b=4,∠C=30°,则△ABC面积的最大值是 1 . 【解答】解:在△ABC中,∵C=30°,a+b=4,∴△ABC的面积S=ab•sin C=ab•sin30°=ab≤×()2=×4=1,当且仅当a=b=2时取等号,故答案为:1.5.(4分)若函数f(x)=log2的反函数的图象经过点(﹣2,3),则a= 2 . 【解答】解:∵函数f(x)=log2的反函数的图象经过点(﹣2,3),∴函数f(x)=log2的图象经过点(3,﹣2),∴﹣2=log2,∴a=2,故答案为2.6.(4分)过半径为2的球O表面上一点A作球O的截面,若OA与该截面所成的角是60°,则该截面的面积是 π .【解答】解:设截面的圆心为Q,由题意得:∠OAQ=60°,QA=1,∴S=π•12=π.答案:π.7.(5分)抛掷一枚均匀的骰子(刻有1,2,3,4,5,6)三次,得到的数字依次记作a,b,c,则a+bi(i为虚数单位)是方程x2﹣2x+c=0的根的概率是.【解答】解:抛掷一枚均匀的骰子(刻有1,2,3,4,5,6)三次,得到的数字依次记作a,b,c,基本事件总数n=6×6×6=216,∵a+bi(i为虚数单位)是方程x2﹣2x+c=0的根,∴(a+bi)2﹣2(a+bi)+c=0,即,∴a=1,c=b2+1,∴a+bi(i为虚数单位)是方程x2﹣2x+c=0的根包含的基本事件为:(1,1,2),(1,2,5),∴a+bi(i为虚数单位)是方程x2﹣2x+c=0的根的概率是p=.故答案为:.8.(5分)设常数a>0,(x+)9展开式中x6的系数为4,则(a+a2+…+a n)= .【解答】解:∵常数a>0,(x+)9展开式中x6的系数为4,∴=,当时,r =2,∴=4,解得a =,∴a +a 2+…+a n ===(1﹣),∴(a +a 2+…+a n )==.故答案为:.9.(5分)已知直线l 经过点且方向向量为(2,﹣1),则原点O 到直线l 的距离为 1 .【解答】解:直线的方向向量为(2,﹣1),所以直线的斜率为:﹣,直线方程为:x +2y +=0,由点到直线的距离可知:=1;故答案为:1.10.(5分)若双曲线的一条渐近线为x +2y =0,且双曲线与抛物线y =x 2的准线仅有一个公共点,则此双曲线的标准方程为.【解答】解:抛物线y =x 2的准线:y =﹣,双曲线与抛物线y =x 2的准线仅有一个公共点,可得双曲线实半轴长为a =,焦点在y 轴上.双曲线的一条渐近线为x +2y =0,∴=, 可得b =,则此双曲线的标准方程为:.故答案为:.11.(5分)平面直角坐标系中,给出点A (1,0),B (4,0),若直线x +my ﹣1=0存在点P ,使得|P A |=2|PB |,则实数m 的取值范围是 m ≥或m ≤﹣.【解答】解:设P (1﹣my ,y ), ∵|P A |=2|PB |, ∴|P A |2=4|PB |2,∴(1﹣my ﹣1)2+y 2=4(1﹣my ﹣4)2+y 2, 化简得(m 2+1)y 2+8my +12=0则△=64m 2﹣48m 2﹣48≥0, 解得m ≥或m ≤﹣, 即实数m 的取值范围是m ≥或m ≤﹣.故答案为:m ≥或m ≤﹣.12.(5分)函数y =f (x )是最小正周期为4的偶函数,且在x ∈[﹣2,0]时,f (x )=2x +1,若存在x 1,x 2,…x n 满足0≤x 1<x 2<…<x n ,且|f (x 1)﹣f (x 2)|+|f (x 2)﹣f (x 1)|+…+|f (x n ﹣1﹣f (x n ))|=2016,则n +x n 的最小值为 1513 . 【解答】解:∵函数y =f (x )是最小正周期为4的偶函数,且在x ∈[﹣2,0]时,f (x )=2x +1,∴函数的值域为[﹣3,1],对任意x i ,x j (i ,j =1,2,3,…,m ),都有|f (x i )﹣f (x j )|≤f (x )max ﹣f (x )min =4,要使n +x n 取得最小值,尽可能多让x i (i =1,2,3,…,m )取得最高点,且f (0)=1,f (2)=﹣3,∵0≤x 1<x 2<…<x m ,|f (x 1)﹣f (x 2)|+|f (x 2)﹣f (x 3)|+…+|f (x n ﹣1)﹣f (x n )|=2016, ∴n 的最小值为,相应的x n 最小值为1008,则n +x n 的最小值为1513.故答案为:1513.二、选择题(本大题共4题,满分20分)13.(5分)若与﹣都是非零向量,则“•=•”是“⊥(﹣)”的( )A .充分但非必要条件B .必要但非充分条件C .充要条件D .既非充分也非必要条件【解答】解:“•=•”⇔“•﹣•=0”⇔“•(﹣)=0”⇔“⊥(﹣)”,故“•=•”是“⊥(﹣)”的充要条件, 故选:C . 14.(5分)行列式中,元素7的代数余子式的值为( ) A .﹣15B .﹣3C .3D .12【解答】解:∵行列式,∴元素7的代数余子式为: D 13=(﹣1)4=2×6﹣5×3=﹣3.故选:B .15.(5分)一个公司有8名员工,其中6名员工的月工资分别为5200,5300,5500,6100,6500,6600,另两名员工数据不清楚,那么8位员工月工资的中位数不可能是( ) A .5800B .6000C .6200D .6400【解答】解:∵一个公司有8名员工,其中6名员工的月工资分别为5200,5300,5500,6100,6500,6600,∴当另外两名员工的工资都小于5300时,中位数为=5400, 当另外两名员工的工资都大于6500时,中位数为=6300,∴8位员工月工资的中位数的取值区间为[5400,6300], ∴8位员工月工资的中位数不可能是6400. 故选:D .16.(5分)若直线+=1通过点P (cos θ,sin θ),则下列不等式正确的是( )A .a 2+b 2≤1 B .a 2+b 2≥1 C .+≤1D .+≥1【解答】解:直线+=1通过点P (cos θ,sin θ), ∴b cos θ+a sin θ=ab , ∴sin (θ+φ)=ab ,其中tan φ=, ∴≥ab ,∴a 2+b 2≥a 2b 2, ∴+≥1,故选:D .三、解答题(满分76分)共5题 17.(14分)某柱体实心铜制零件的截面边长是长度为55毫米线段AB 和88毫米的线段AC 以及圆心为P ,半径为PB 的一段圆弧BC 构成,其中∠BAC =60°.(1)求半径PB 的长度;(2)现知该零件的厚度为3毫米,毫米,试求该零件的重量试求该零件的重量试求该零件的重量(每(每1个立方厘米铜重8.9克,按四舍五入精确到0.1克).V 柱=S 底•h .【解答】解:(1)∵AB =55,AC =88,BP =R ,∠BAC =60°.AP =88﹣R , ∴在△ABP 中,由余弦定理可得:BP 2=AB 2+AP 2﹣2AB •AP •cos ∠BAC ,可得:R 2=552+(88﹣R )2﹣2×55×(88﹣R )×cos60°, ∴解得:R =49mm .(2)在△ABP 中,AP =88﹣49=39mm ,AB =55,BP =49, cos ∠BP A ==≈0.2347, ∴sin ∠BP A ≈0.972. ∴∠BP A =arcsin0.972.V柱=S底•h=(S△ABP+S扇形BPC)•h=(+)•3该零件的重量=(+)•3÷1000×8.9≈82.7.18.(14分)如图所示,l1,l2是互相垂直的异面直线,MN是它们的公垂线段,点A,B在直线l1上,且位于M点的两侧,C在l2上,AM=BM=NM=CN (1)求证:异面直线AC与BN垂直;(2)若四面体ABCN的体积V ABCN=9,求异面直线l1,l2之间的距离.【解答】解:(1)证明:由已知l2⊥MN,l2⊥l1,MN∩l1=M,可得l2⊥平面ABN. 由已知MN⊥l1,AM=MB=MN,可知AN=NB且AN⊥NB.又AN为AC在平面ABN内的射影.∴AC⊥NB(2)∵AM=BM=NM=CN,MN是它们的公垂线段,就是异面直线l1,l2之间的距离,由中垂线的性质可得AN=BN,四面体ABCN的体积V ABCN=9,可得:V ABCN=9==MN3,∴MN=3.异面直线l1,l2之间的距离为3.19.(14分)如图所示,椭圆C:+y2=1,左右焦点分别记作F1,F2,过F1,F2分别作直线l1,l2交椭圆AB,CD,且l1∥l2.(1)当直线l 1的斜率k1与直线BC的斜率k2都存在时,求证:k1•k2为定值;(2)求四边形ABCD面积的最大值.【解答】(1)证明:由椭圆C:+y2=1,得a2=4,b2=1,∴.设k1=k,则AB所在直线方程为y=kx+,CD所在直线方程为y=kx﹣, 联立,得(1+4k2)x2+8k2x+12k2﹣4=0.解得,不妨取,则 同理求得,.则==,则k1•k2=;(2)解:由(1)知,,|AB|===.AB、CD的距离d=,∴=.令1+4k2=t(t≥1),则,∴当t=3时,S max=4.20.(14分)数列{a n},定义{△a n}为数列{a n}的一阶差分数列,其中△a n=a n+1﹣a n(n∈N*)(1)若a n=n2﹣n,试判断{△a n}是否是等差数列,并说明理由;(2)若a1=1,△a n﹣a n=2n,求数列{a n}的通项公式;(3)对(b)中的数列{a n},是否存在等差数列{b n},使得b1C+b2C+…+b n C =a n,对一切n∈N*都成立,若存在,求出数列{b n}的通项公式,若不存在,请说明理由.【解答】解:(1)若a n=n2﹣n,试判断{△a n}是等差数列,理由如下:∵a n=n2﹣n,∴△a n=a n+1﹣a n=(n+1)2﹣(n+1)﹣(n2﹣n)=2n,∵△a n+1﹣△a n=2,且△a1=4,∴{△a n}是首项为4,公差为2的等差数列;(2)∵△a n﹣a n=2n.△a n=a n+1﹣a n,∴a n+1﹣2a n=2n,∴﹣=,(6分)∴数列{}构成以为首项,为公差的等差数列,即=⇒a n=n•2n﹣1;(3)b1∁n1+b2∁n2+…+b n∁n n=a n,即b1∁n1+b2∁n2+…+b n∁n n=n•2n﹣1,∵1∁n1+2∁n2+3∁n3+…+n∁n n=n(C n﹣10+C n﹣11+C n﹣12+…+C n﹣1n﹣1)=n•2n﹣1,∴存在等差数列{b n},b n=n,使得b1∁n1+b2∁n2+…+b n∁n n=a n对一切自然n∈N都成立.21.(20分)对于函数f(x)(x∈D),若存在正常数T,使得对任意的x∈D,都有f(x+T)≥f(x)成立,我们称函数f(x)为“T同比不减函数”.(1)求证:对任意正常数T,f(x)=x2都不是“T同比不减函数”;(2)若函数f(x)=kx+sin x是“同比不减函数”,求k的取值范围; (3)是否存在正常数T,使得函数f(x)=x+|x﹣1|﹣|x+1|为“T同比不减函数”;若存在,求T的取值范围;若不存在,请说明理由.【解答】解:(1)∵f(x)=x2,∴f(x+T)﹣f(x)=(x+T)2﹣x2=2xT+T2=T(2x+T),由于2x+T与0的小无法比较,∴f(x+T)≥f(x)不一定成立,∴对任意正常数T,f(x)=x2都不是“T同比不减函数,(2)∵函数f(x)=kx+sin x是“同比不减函数,∴f(x+)﹣f(x)=k(x+)+sin(x+)﹣kx﹣sin x=+cos x﹣sin x=﹣sin(x﹣)≥0恒成立,∴k≥sin(x﹣),∵﹣1≤sin(x﹣)≤1,∴k≥,(3)f(x)=x+|x﹣1|﹣|x+1|图象如图所示,由图象可知,只要把图象向左至少平移4个单位,即对任意的x∈D,都有f(x+T)≥f(x)成立,∴T≥4.赠送—高中数学知识点【2.1.1】指数与指数幂的运算 (1)根式的概念)根式的概念①如果,,,1nx a a R x R n =ÎÎ>,且n N +Î,那么x 叫做a 的n 次方根.当n 是奇数时,a 的n 次方根用符号n a 表示;当n 是偶数时,正数a 的正的n 次方根用符号n a 表示,负的n 次方根用符号n a -表示;表示;00的n 次方根是0;负数a 没有n 次方根.次方根.②式子n a 叫做根式,这里n 叫做根指数,a 叫做被开方数.当n 为奇数时,a 为任意实数;当n 为偶数时,0a ³.③根式的性质:()nna a =;当n 为奇数时,nna a =;当n 为偶数时,(0)|| (0)nn a a a a a a ³ì==í-<î. (2)分数指数幂的概念)分数指数幂的概念①正数的正分数指数幂的意义是:(0,,,m nmna a a m n N +=>Î且1)n >.0的正分数指数幂等于0.②正数的负分数指数幂的意义是:11()()(0,,,mmmn nnaa m n N a a-+==>Î且1)n >.0的负分数指数幂没有意义.的负分数指数幂没有意义. 注意口诀:底数取倒数,指数取相反数.底数取倒数,指数取相反数.(3)分数指数幂的运算性质)分数指数幂的运算性质①(0,,)r s r s a a a a r s R +×=>Î ②()(0,,)r s rs a a a r s R =>Î ③()(0,0,)r r rab a b a b r R =>>Î【2.1.2】指数函数及其性质 (4)指数函数)指数函数 函数名称函数名称指数函数指数函数定义定义函数(0xy a a =>且1)a ¹叫做指数函数叫做指数函数图象图象1a >01a <<定义域定义域 R值域值域 (0,)+¥过定点过定点 图象过定点(0,1),即当0x =时,1y =.奇偶性奇偶性 非奇非偶非奇非偶单调性单调性在R 上是增函数上是增函数在R 上是减函数上是减函数函数值的函数值的 变化情况变化情况1(0)1(0)1(0)xx x a x a x a x >>==<< 1(0)1(0)1(0)xx x a x a x a x <>==>< a 变化对变化对 图象的影响象的影响 在第一象限内,a 越大图象越高;在第二象限内,a 越大图象越低.越大图象越低.xa y =xy(0,1)O1y =xa y =xy (0,1)O 1y =〖2.2〗对数函数【2.2.1】对数与对数运算(1)对数的定义)对数的定义①若(0,1)xa N a a =>¹且,则x 叫做以a 为底N 的对数,记作log a x N =,其中a 叫做底数,N 叫做真数.叫做真数.②负数和零没有对数.②负数和零没有对数.③对数式与指数式的互化:log (0,1,0)x a x N a N a a N =Û=>¹>. (2)几个重要的对数恒等式)几个重要的对数恒等式log 10a =,log 1a a =,log b aa b =.(3)常用对数与自然对数)常用对数与自然对数常用对数:lg N ,即10log N ;自然对数:ln N ,即log e N (其中 2.71828e =…). (4)对数的运算性质)对数的运算性质 如果0,1,0,0a a M N >¹>>,那么,那么①加法:log log log ()a a aM N MN += ②减法:log log log a a a M M N N-= ③数乘:log log ()n a a n M M n R =Î ④log a Na N =⑤log log (0,)bn a a n M M b n R b=¹Î ⑥换底公式:log log (0,1)log b ab N N b b a=>¹且【2.2.2】对数函数及其性质(5)对数函数)对数函数函数函数 名称名称 对数函数对数函数定义定义函数log (0a yx a =>且1)a ¹叫做对数函数叫做对数函数图象图象1a > 01a <<xyO(1,0)1x =log a y x=xyO (1,0)1x =log a y x=定义域定义域(0,)+¥值域值域R过定点过定点图象过定点(1,0),即当1x=时,0y=. 奇偶性奇偶性非奇非偶非奇非偶单调性单调性在(0,)+¥上是增函数上是增函数在(0,)+¥上是减函数上是减函数函数值的函数值的变化情况变化情况log0(1)log0(1)log0(01)aaax xx xx x>>==<<<log0(1)log0(1)log0(01)aaax xx xx x<>==><<a变化对变化对 图象的影响象的影响 在第一象限内,a越大图象越靠低;在第四象限内,a越大图象越靠高.越大图象越靠高.。

上海市杨浦区2017届高三一模生物卷(含答案)(K12教育文档)

上海市杨浦区2017届高三一模生物卷(含答案)(K12教育文档)

上海市杨浦区2017届高三一模生物卷(含答案)(word版可编辑修改) 编辑整理:尊敬的读者朋友们:这里是精品文档编辑中心,本文档内容是由我和我的同事精心编辑整理后发布的,发布之前我们对文中内容进行仔细校对,但是难免会有疏漏的地方,但是任然希望(上海市杨浦区2017届高三一模生物卷(含答案)(word版可编辑修改))的内容能够给您的工作和学习带来便利。

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杨浦区2016学年度第一学期高中等级考质量调研高三年级生命科学学科试卷2016。

12本试卷共8页。

满分100分。

考试时间为60分钟。

请在答题纸上填写学校、姓名、准考证号,并将核对后的条形码贴在指定位置上.答案全部涂、写在答題纸上,不要超过答题框,否则不得分。

一. 单选题(共40分。

每小题只有一个正确选项)1. 构成细胞内生命物质的主要有机成分是A .蛋白质和核酸B .糖类和蛋白质C .蛋白质和脂质D .糖类和核酸2. 如图是细胞发生的一系列变化过程,有关分析正确的是A . 过程①表示细胞生长B . 过程②表示细胞分化C . 过程②染色体数会减半D . 过程③表示细胞分裂3. 在电子显微镜下,颤藻和水稻叶肉细胞中都能被观察到的结构是A .叶绿体和液泡B .内质网和核糖体C .核糖体和细胞膜D .细胞核和线粒体4. 将紫色洋葱表皮细胞置于30%的蔗糖溶液中,光镜下所能看到的现象是①区域1扩大 ②区域1缩小 ③区域2紫色变浅 ④区域2紫色加深 ⑤原生质层与细胞壁逐渐分离 ⑥细胞膜、液泡膜结构清晰A . ①③⑤B . ①④⑤C . ②④⑤D . ①④⑥5. 下列关于测量蚕豆叶下表皮保卫细胞长度的实验操作,正确的是A .要使视野的右下方物像移到视野中央,须将装片移向左上方B .从低倍镜转到高倍镜时,轻轻地转动物镜使高倍镜到位C .高倍镜放大了观察视野,增大了放大倍数D .测量细胞长度时,应尽量使目镜测微尺与被测细胞平行并重叠6. 剧烈运动时人体骨骼肌细胞进行呼吸作用,下列叙述中,错误..的是A .人剧烈运动时骨骼肌能同时产生乳酸和CO 2B .该细胞有氧呼吸产物与酵母菌有氧呼吸的产物相同C .会使溴代麝香草酚蓝水溶液的颜色发生蓝→绿→黄的变化12D.该细胞呼吸产物与乳酸菌细胞呼吸的产物相同7. 下列化学反应属于氧化分解反应的是①核酸→核苷酸②葡萄糖→丙酮酸③麦芽糖→葡萄糖④丙酮酸→二碳化合物+水A.①②B.①③C.②③D.②④8. 人体蛋白与食物蛋白的氨基酸含量比例不同,保证食物蛋白被合理利用的主要生理作用和当体内糖类物质不足时氨基酸发生的生理作用分别为①脱氨基作用②脱水缩合作用③转氨基作用④不含氮部分的氧化分解A.①④B.③②C.③①D.①③9。

上海市2017杨浦区初三化学一模试卷含参考答案.docx

上海市2017杨浦区初三化学一模试卷含参考答案.docx

D.液体的取用杨浦区2016学年度第一学期期末质量调研考生注意:请将答案填写在答题卷对应的方框内。

3、碘酸钙是一种补碘、补钙的添加剂,其化学式为Ca (IO 3)2,碘酸钙中碘元素的化合价是A. +5B. +1C.D. +74、 人体中含量最多的元素是A. CuB. CC. HD. O5、 属于单质的是A.水B.氯气C.干冰D.氯酸钾6、 四种植物花汁在不同溶液这呈现的颜色如下表。

若要检测某溶液的酸碱性,最好选用pH<7 =7>7 玫瑰花汁 粉红 粉红 绿 万寿菊花汁 黄 黄 黄 大红花汁橙 粉红 绿 万年青花汁橙黄浅绿浅绿A.玫瑰花汁B.万寿菊花汁C.大红花汁D.万年青花汁7、石墨和Ceo 的化学性质相似,物理性质却有很大差异。

其原因是A.碳原子的排列方式不同B.构成它们的原子数目不同C.由不同种原子构成D.构成它们的原子大小不同 8、关于CO?与CO 的比较,错误的是A. 固体CO?可用于人工降雨,CO 可用于光合作用B. 通常情况下,CO?能溶于水,CO 难溶于水C. CO?无毒,CO 易与血液中的血红蛋白结合引起中毒D. —个二氧化碳分子比一个一氧化碳分子多一个氧原子9、下列实验现象描述正确的是A.点燃一氧化碳,发出蓝色火焰B.硫在空气中燃烧,发出蓝紫色火焰C.铁丝在空气中燃烧时,火星四射D.水电解时,产生了氢气和氧气10、下图表示初中化学常见实验操作,其中正确的是初三化学试卷(满分100分,考试时间90分2017.1可能用到的相对原子质量:H-l C-12 一、单项选择题(本题共24分)1、属于化学变化的是A.冰雪融化 B.煤气燃烧2、属于纯净物的是0-16CI-35.5Ca-40C.金桂飘香D.尘土飞扬C.空气D.石油A.点燃酒精灯B.检查装置的气密性C.读出液体的体积11、氧气在一定条件下变成淡蓝色液体,此过程中发生变化的是A.氧分子的体积B.构成氧分子的原子C.氧气的化学性质D.氧分子的间隔12、在家庭小实验中,不能达到预期目的的是A.品尝一一鉴别白糖和食盐B.观察一一鉴别精白面粉和淀粉C.闻气味一一鉴别白洒和白醋D.点燃一一鉴别氧气和天然气13、有关氧气的制取、收集、验满、性质的实验中错误的是A.制取B.收集14、某气体常温下不与空气中的成分反应,方法是17、根据某燃料X完全燃烧的化学方程式:X+3O2」^T2CO2+3H2O,判断错误的是A. X的化学式为C2H6OB. X是有机物C. 化学方程式中各物质的系数比与物质的量之比相等D. 该反应前后分子的个数没有发生改变18、甲物质的溶液可用作化肥、电镀液等。

杨浦区年一模Word版附答案

杨浦区年一模Word版附答案

杨浦区第一学期期末期末质量调研初三英语练习卷(满分150分,考试时间100分钟)(本卷有七大题,共94小题。

试题均采用连续编号。

所有答案务必按照规定在答题纸上完成,做在试卷上不给分。

)Part 1 Listening (第一部分听力)I. Listening Comprehension (听力理解)(共30分)A. Listen and choose the right picture (根据你所听到的内容,选出相应的图片)(6分)1._______2. _______3._______4. _______5. _______6._______B. Listen to the dialogue and choose the best answer to the question you hear (根据你所听到的对话和问题,选择最恰当的答案)(8分)A) Shy. B) Pretty. C) Serious. D) Active.A) A B) A TV host. C) A bank D) A writer.A) 2:00. B) 2:15. C) 2:30. D) 2:45.1A) By check. B) By cash. C) By D) By Apple Pay.1A) A TV B) A part-time C) A plan D)A choices of1 2. A) The shoes are too heavy.C) She d oesn’t like the shoes.B) The ground is wet.D) It is raining outside.1 3. A) Some Chinese were hit by localpeople.B) An earthquake occurred there last night.C. Listen to the passage and (ell whether the following statements are true or false (判断下列 句子是否符合你听到的短文内容,符合的用“T”表示,不符合的用“F”表示)(6分)15.Barry Haddow travels from Wales to London every day.16. The “Commuter of the Year” competition was organized by an early m orning TV program.17. Mr. Haddow won because his commute takes the longest time.18. He travels most of the way by train, and then by taxi.19. He doesn’t like wales, but it’s not as expensive as London.20. He won a rail holiday for himself and his family.D. Listen to the passage and fill in the blanks (听短文填空,完成下列句子。

2017闵行,黄浦,普陀,杨浦初三语文一模卷记叙文阅读附答案

2017闵行,黄浦,普陀,杨浦初三语文一模卷记叙文阅读附答案

2017闵行老陆①冬天的时候回清华,经过西南小区,还是那片红砖楼,灰头土脸的。

想起老陆曾经住在这里的一栋,具体哪栋已经辨认不清了。

自从出国,我再也没回去看过老陆,想到他已经不在了,心里很愧疚。

②做学生的时候,每周有一个晚上,我会骑着车,一手拎着琴,去找老陆上课。

拜师的时候,老陆已经八十岁了,手抖得厉害,就连说话声音也有点颤。

他刚毕业的一个学生向他推荐了我,胡吹了一通,说我感觉特别好,言外之意是技巧很烂。

老陆听我随便拉了两段,说:“你的毛病很多,有决心改么?”“有。

”“能保证练琴么?”“能。

”“你拉的东西太难了,要改毛病就得退回去很多重学,能接受么?”“能。

”“我从前在音乐室的时候教琴是不收费的,现在退休了,要收一定的学费。

你是学生,我不按外面的标准收费,每月十块钱。

”“好。

”于是就进了师门。

③一开始我被往回退了三到五年,从最简单的维瓦尔第协奏曲开始重练,不准揉弦。

“你的揉弦像痉挛,”老陆说,“是没有经过正规训练的,需要按照规矩重新练起来,用节拍器,每拍三个音、四个音、六个音、八个音,这样练上去,最后要达到能够任意控制快慢。

”而我一切都言听计从。

④因为手抖的问题,老陆早就不拉琴了,教琴全靠嘴。

上课的时候,他总是站在谱架旁指挥,激动起来就唱,恨不得帮你把情感表达到位。

他的唱腔也是抖的,像幅度过大的揉音。

教学计划蛮严格,每周的作业有音阶琶音、一首练习曲、双音练习,每阶段有一首协奏曲、一首小曲子、一首中国乐曲,老陆是严格按照业余考级标准安排曲目和基本练习的。

每拉一首曲子,他就给我拷贝磁带,让我仔细模仿大师,练好后还会叫夫人弹琴跟我合伴奏。

谱子也都是他给我,上面标着密密麻麻的弓法指法,首页的边角处往往还有音乐室的图章,有些甚至是手抄本的复印件,双音练习是他自己编写的,这些都是他几十年教学攒下来的资料,而我是最后一个使用者。

⑤前几天碰上当年乐队的首席,也跟老陆学过一小段,说:“老陆总在夸你。

”我想,我水平那么臭,没什么可夸的,唯一不同的就是我听话,坚持练琴。

【月考试卷】上海市杨浦区2017届高三上学期期末质量调研(一模)语文试题 Word版含答案

【月考试卷】上海市杨浦区2017届高三上学期期末质量调研(一模)语文试题 Word版含答案

杨浦区2017届高三一模语文试卷(满分150分,时间150分钟) 2016年12月一阅读(80分)(一)阅读下文,完成1-6题。

(17分)中国社会科学网讯(记者曾江通讯员郑远)9月29日,2016中国艺术品产业创新暨艺术品投融资高峰论坛在北京宋庄召开,论坛上发布了中国文化产业智库研究中心出品、西沐主笔的《中国艺术品产业发展年度研究报告[2015]》。

据悉,这是我国首份关于中国艺术品产业发展的年度研究报告。

中国艺术品产业已经成为一个重要的新的发展业态,是中国文化产业发展的重要组成部分,是中国艺术品市场发展到一定阶段的必然结果,更是中国艺术品市场转型及上台阶、扩规模的前提与重要动力。

中国艺术品产业的快速发展,也是我国文化建设与文化大发展大繁荣的必然要求。

中国艺术品产业的发展,引起了人们越来越多的关注与重视,相关的前沿理论与实践前沿为中国艺术品产业的理论与实践提供了支撑与引导,产业的发展需要更多的研究、探索,《中国艺术品产业发展年度研究报告》就是在这个背景下出研究、编制与发布的。

研究报告的主体部分分为概述,艺术品市场与艺术品产业,中国艺术品产业的概念、构成、特点与意义,中国艺术品产业发展的现状、问题与趋势,中国艺术品产业发展的阶段、规模与结构分析,中国艺术品产业发展的战略方向,中国艺术品产业管理分析,中国艺术品产业支撑体系分析,对策与建议,结束语等十个部分。

报告全文十余万字。

报告反映,中国艺术品产业的体系构成,概括地讲也可以划分为以下几个大的类型:(1)书法艺术品产业;(2)美术艺术品产业;(3)工艺艺术品产业;(4)民间(非遗)艺术品产业;(5)古董杂项艺术品产业;(6)以版权为中心的衍生艺术品产业;(7)艺术品服务产业;(8)艺术品产业的支撑体系;(9)艺术品产业的生态体系。

中国艺术品产业的规模分为三个不同的层次,即核心层、外围层与辐射层。

根据现有条件,研究报告仅对中国艺术品产业的核心层进行了相应的规模分析,据统计估算,2015年中国艺术品产业规模为8020亿元。

杨浦区2017届高三一模数学卷答案及官方评分标准

杨浦区2017届高三一模数学卷答案及官方评分标准

8
2
MN 就是异面直线 l1
l2 之间的距离
10
设 d = AM = BM = NM = CN
1 1 1 所以 VABCN = ( (2d ⋅ d ) ⋅ d = d 3 = 9 3 2 3
所以 d = 3 ,即异面直线 l1
12
l2 之间的距离为 3
14
19
本题满 证明: 根据对
14
本题共有 2 个小题,第 1 小题满
x = −1 时,因为 f (−1 + T ) ≥ f (−1) = 1 = f (3) 成立, 所以 −1 + T ≥ 3 ,所以 T ≥ 4 13 而另一方面,若 T ≥ 4 , x ∈ (−∞, − 1] 时, f ( x + T ) − f ( x) = x + T + | x + T − 1| − | x + T + 1| −( x + 2) = T + | x + T − 1| − | x + T + 1| −2 因为 | x + T − 1| − | x + T + 1| ≥ − | ( x + T − 1) − ( x + T + 1) |= −2 所以 f ( x + T ) − f ( x) ≥ T − 2 − 2 ≥ 0 ,所以有 f ( x + T ) ≥ f ( x) 成立 15 x ∈ [−1, + ∞ ) 时, f ( x + T ) − f ( x) = x + T − 2 − ( x + | x − 1| − | x + 1|) = T − 2− | x − 1| + | x + 1| 因为 | x + 1| − | x − 1| ≥ − | ( x + 1) − ( x − 1) |= −2 所以 f ( x + T ) − f ( x) ≥ T − 2 − 2 ≥ 0 即 f ( x + T ) ≥ f ( x ) 成立 17 综 ,恒有有 f ( x + T ) ≥ f ( x ) 成立 所以 T 的取值范围是 [4, + ∞) 18

上海市杨浦区2017年中考数学一模试卷(含解析)

上海市杨浦区2017年中考数学一模试卷(含解析)

精品文档,欢迎下载如果你喜欢这份文档,欢迎下载,另祝您成绩进步,学习愉快!上海市杨浦区2017年中考数学一模试卷一、选择题(本大题共6题,每题4分,满分24分)1.如果延长线段AB到C,使得,那么AC:AB等于()A.2:1 B.2:3 C.3:1 D.3:22.在高为100米的楼顶测得地面上某目标的俯角为α,那么楼底到该目标的水平距离是()A.100tanα B.100cotα C.100sinα D.100cosα3.将抛物线y=2(x﹣1)2+3向右平移2个单位后所得抛物线的表达式为()A.y=2(x﹣1)2+5 B.y=2(x﹣1)2+1 C.y=2(x+1)2+3 D.y=2(x﹣3)2+34.在二次函数y=ax2+bx+c中,如果a>0,b<0,c>0,那么它的图象一定不经过()A.第一象限 B.第二象限 C.第三象限 D.第四象限5.下列命题不一定成立的是()A.斜边与一条直角边对应成比例的两个直角三角形相似B.两个等腰直角三角形相似C.两边对应成比例且有一个角相等的两个三角形相似D.各有一个角等于100°的两个等腰三角形相似6.在△ABC和△DEF中,∠A=40°,∠D=60°,∠E=80°,,那么∠B的度数是()A.40° B.60° C.80° D.100°二、填空题(本大题共12题,每题4分,满分48分)7.线段3cm和4cm的比例中项是cm.8.抛物线y=2(x+4)2的顶点坐标是.9.函数y=ax2(a>0)中,当x<0时,y随x的增大而.10.如果抛物线y=ax2+bx+c(a≠0)经过点(﹣1,2)和(4,2),那么它的对称轴是直线.11.如图,△ABC中,点D、E、F分别在边AB、AC、BC上,且DE∥BC,EF∥AB,DE:BC=1:3,那么EF:AB的值为.12.如图,在梯形ABCD中,AD∥BC,AC与BD相交于点O,如果BC=2AD,那么S△ADC:S△ABC 的值为.13.如果两个相似三角形的面积之比是9:25,其中小三角形一边上的中线长是12cm,那么大三角形对应边上的中线长是cm.14.如果+=3,2﹣=,那么= (用表示).15.已知α是锐角,tanα=2cos30°,那么α=度.16.如图是一斜坡的横截面,某人沿着斜坡从P处出发,走了13米到达M处,此时在铅垂方向上上升了5米,那么该斜坡的坡度是i=1:.17.用“描点法”画二次函数y=ax2+bx+c(a≠0)的图象时,列出了如下表格: x … 1 2 3 4 …y=ax2+bx+c … 0 ﹣1 0 3 …那么该二次函数在x=0时,y= .18.如图,△ABC中,AB=AC=5,BC=6,BD⊥AC于点D,将△BCD绕点B逆时针旋转,旋转角的大小与∠CBA相等,如果点C、D旋转后分别落在点E、F的位置,那么∠EFD的正切值是.三、解答题(本大题共7题,满分78分)19.(10分)如图,已知△ABC中,点F在边AB上,且AF=AB、过A作AG∥BC交CF的延长线于点G.(1)设=, =,试用向量和表示向量;(2)在图中求作向量与的和向量.(不要求写作法,但要指出所作图中表示结论的向量)20.(10分)已知抛物线y=﹣x2+bx+c经过点B(﹣1,0)和点C(2,3).(1)求此抛物线的表达式;(2)如果此抛物线上下平移后过点(﹣2,﹣1),试确定平移的方向和平移的距离.21.(10分)已知:如图,梯形ABCD中,AD∥BC,∠ABD=∠C,AD=4,BC=9,锐角∠DBC 的正弦值为.求:(1)对角线BD的长;(2)梯形ABCD的面积.22.(10分)如图,某客轮以每小时10海里的速度向正东方向航行,到A处时向位于南偏西30°方向且相距12海里的B处发出送货请求,货轮接到请求后即刻沿着北偏东某一方向以每小时14海里的速度出发,在C处恰好与客轮相逢,试求货轮从出发到客轮相逢所用的时间.23.(12分)已知:如图,在△ABC中,点D、G分别在边AB、BC上,∠ACD=∠B,AG与CD 相交于点F.(1)求证:AC2=AD•AB;(2)若=,求证:CG2=DF•BG.24.(12分)在直角坐标系xOy中(如图),抛物线y=ax2﹣4ax+4a+3(a<0)的顶点为D,它的对称轴与x轴交点为M.(1)求点D、点M的坐标;(2)如果该抛物线与y轴的交点为A,点P在抛物线上且AM∥DP,AM=2DP,求a的值.25.(14分)在Rt△ABC中,∠ACB=90°,AC=BC=2,点P为边BC上的一动点(不与B、C 重合),点P关于直线AC、AB的对称点分别为M、N,连接MN交边AB于点F,交边AC于点E.(1)如图1,当点P为边BC的中点时,求∠M的正切值;(2)连接FP,设CP=x,S△MPF=y,求y关于x的函数关系式,并写出定义域;(3)连接AM,当点P在边BC上运动时,△AEF与△ABM是否一定相似?若是,请证明;若不是,请求出当△AEF与△ABM相似时CP的长.2017年上海市杨浦区中考数学一模试卷参考答案与试题解析一、选择题(本大题共6题,每题4分,满分24分)1.如果延长线段AB到C,使得,那么AC:AB等于()A.2:1 B.2:3 C.3:1 D.3:2【考点】两点间的距离.【分析】作出图形,用AB表示出AC,然后求比值即可.【解答】解:如图,∵BC=AB,∴AC=AB+BC=AB+AB=AB,∴AC:AB=3:2.故选D.【点评】本题考查了两点间的距离,用AB表示出AC是解题的关键,作出图形更形象直观.2.在高为100米的楼顶测得地面上某目标的俯角为α,那么楼底到该目标的水平距离是()A.100tanα B.100cotα C.100sinα D.100co sα【考点】解直角三角形的应用﹣仰角俯角问题.【分析】根据题意画出图形,利用锐角三角函数的定义直接进行解答即可.【解答】解:∵∠BAC=α,BC=100m,∴AB=BC•cotα=100cotαm.故选:B.【点评】本题考查的是解直角三角形的应用﹣仰角俯角问题,根据题意画出图形,利用数形结合求解是解答此题的关键.3.将抛物线y=2(x﹣1)2+3向右平移2个单位后所得抛物线的表达式为()A.y=2(x﹣1)2+5 B.y=2(x﹣1)2+1 C.y=2(x+1)2+3 D.y=2(x﹣3)2+3【考点】二次函数图象与几何变换.【分析】根据二次函数图象左加右减,上加下减的平移规律进行求解.【解答】解:抛物线y=2(x﹣1)2+3向右平移2个单位,可得y=2(x﹣1﹣2)2+3,即y=2(x﹣3)2+3,故选:D.【点评】本题主要考查的是函数图象的平移,用平移规律“左加右减,上加下减”直接代入函数解析式求得平移后的函数解析式.4.在二次函数y=ax2+bx+c中,如果a>0,b<0,c>0,那么它的图象一定不经过()A.第一象限 B.第二象限 C.第三象限 D.第四象限【考点】二次函数图象与系数的关系.【分析】根据已知条件“a>0,b<0,c>0”判断出该函数图象的开口方向、与x和y轴的交点、对称轴所在的位置,然后据此来判断它的图象一定不经过第三象限.【解答】解:①∵a>0、c>0,∴该抛物线开口方向向上,且与y轴交于正半轴;②∵a>0,b<0,∴二次函数y=ax2+bx+c的函数图象的对称轴是x=﹣>0,∴二次函数y=ax2+bx+c的函数图象的对称轴在第一象限;综合①②,二次函数y=ax2+bx+c的图象一定不经过第三象限.故选C.【点评】本题考查了二次函数图象与系数的关系.根据二次函数y=ax2+bx+c系数符号判断抛物线开口方向、对称轴、抛物线与y轴的交点抛物线与x轴交点的个数.5.下列命题不一定成立的是()A.斜边与一条直角边对应成比例的两个直角三角形相似B.两个等腰直角三角形相似C.两边对应成比例且有一个角相等的两个三角形相似D.各有一个角等于100°的两个等腰三角形相似【考点】命题与定理.【分析】根据相似三角形的判定定理进行判定即可.【解答】解:斜边与一条直角边对应成比例的两个直角三角形相似一定成立;两个等腰直角三角形相似一定成立;两边对应成比例且有一个角相等的两个三角形相似不一定成立;各有一个角等于100°的两个等腰三角形相似一定成立,故选:C.【点评】本题考查的是命题的真假判断,正确的命题叫真命题,错误的命题叫做假命题.判断命题的真假关键是要熟悉课本中的性质定理.6.在△ABC和△DEF中,∠A=40°,∠D=60°,∠E=80°,,那么∠B的度数是()A.40° B.60° C.80° D.100°【考点】相似三角形的判定与性质.【分析】根据可以确定对应角,根据对应角相等的性质即可求得∠B的大小,即可解题.【解答】解:∵,∴∠B与∠D是对应角,故∠B=∠D=60°.故选B.【点评】本题考查了相似三角形对应角相等的性质,考查了对应边比值相等的性质,本题中求∠B和∠D是对应角是解题的关键.二、填空题(本大题共12题,每题4分,满分48分)7.线段3cm和4cm的比例中项是2cm.【考点】比例线段.【分析】根据比例中项的概念,a:b=b:c,设比例中项是xcm,则列比例式可求.【解答】解:设比例中项是xcm,则:3:x=x:4,x2=12,x=±2,∵线段是正值,∴负值舍去,故答案为:2.【点评】本题主要考查了比例线段,理解比例中项的概念,求两条线段的比例中项的时候,应舍去负数是解答此题的关键.8.抛物线y=2(x+4)2的顶点坐标是(﹣4,0).【考点】二次函数的性质.【分析】由抛物线的解析式可求得答案.【解答】解:∵y=2(x+4)2,∴抛物线顶点坐标为(﹣4,0),故答案为:(﹣4,0).【点评】本题主要考查二次函数的性质,掌握二次函数的顶点式是解题的关键,即在y=a(x ﹣h)2+k中,对称轴为x=h,顶点坐标为(h,k).9.函数y=ax2(a>0)中,当x<0时,y随x的增大而减小.【考点】二次函数的性质.【分析】由解析式可确定其开口方向,再根据增减性可求得答案.【解答】解:∵y=ax2(a>0),∴抛物线开口向上,对称轴为y轴,∴当x<0时,y随x的增大而减小,故答案为:减小.【点评】本题主要考查二次函数的性质,掌握二次函数的增减性是解题的关键.10.如果抛物线y=ax2+bx+c(a≠0)经过点(﹣1,2)和(4,2),那么它的对称轴是直线x=.【考点】二次函数的性质.【分析】根据抛物线上函数值相等的点离对称轴的距离相等可求得答案.【解答】解:∵抛物线y=ax2+bx+c(a≠0)经过点(﹣1,2)和(4,2),∴对称轴为x==,故答案为:x=.【点评】本题主要考查二次函数的性质,掌握抛物线上函数值相等的点离对称轴的距离相等是解题的关键.11.如图,△ABC中,点D、E、F分别在边AB、AC、BC上,且DE∥BC,EF∥AB,DE:BC=1:3,那么EF:AB的值为.【考点】相似三角形的判定与性质.【分析】利用DE∥BC可判断△ADE∽△ABC,利用相似的性质的得==,再利用比例性质得=,然后证明△CEF∽△CAB,然后利用相似比可得到的值.【解答】解:∵DE∥BC,∴△ADE∽△ABC,∴==,∴=,∵EF∥AB,∴△CEF∽△CAB,故答案为.【点评】本题考查了三角形相似的判定与性质:在判定两个三角形相似时,应注意利用图形中已有的公共角、公共边等隐含条件,以充分发挥基本图形的作用,寻找相似三角形的一般方法是通过作平行线构造相似三角形;在运用相似三角形的性质时,主要利用相似进行几何计算.12.如图,在梯形ABCD中,AD∥BC,AC与BD相交于点O,如果BC=2AD,那么S△ADC:S△ABC 的值为1:2 .【考点】相似三角形的判定与性质;梯形.【分析】根据梯形的性质和三角形的面积计算公式,可以解答本题.【解答】解:∵在梯形ABCD中,AD∥BC,BC=2AD,设AD与BC间的距离为h,则,故答案为:1:2.【点评】本题考查梯形、三角形的面积,解题的关键是明确题意,找出所求问题需要的条件.13.如果两个相似三角形的面积之比是9:25,其中小三角形一边上的中线长是12cm,那么大三角形对应边上的中线长是20 cm.【考点】相似三角形的性质.【分析】因为两个三角形的面积之比9:25,根据相似三角形面积比等于相似比的平方,即可求出周长的比,又因为对应中线的比等于相似比即可求出大三角形的中线.【解答】解:∵两个相似三角形的面积之比是9:25,∴大三角形的周长:小三角形的周长是5:3,∵小三角形一边上的中线长是12cm,∴大三角形对应边上的中线长是20cm.【点评】本题考查对相似三角形性质的理解.(1)相似三角形面积的比等于相似比的平方;(3)相似三角形对应中线的比等于相似比.14.如果+=3,2﹣=,那么= (用表示).【考点】*平面向量.【分析】根据平面向量的运算法则进行计算即可.【解答】解:∵2﹣=,∴6﹣3=3,∵+=3,∴+=6﹣3,∴=.故答案是:.【点评】本题考查了平面向量的运算,类似于解一元一次方程进行计算即可,比较简单,要注意移项要变号.15.已知α是锐角,tanα=2cos30°,那么α=60 度.【考点】特殊角的三角函数值.【分析】根据30°角的余弦值等于,正切值是的锐角为60°解答即可.【解答】解:∵tanα=2cos30°=2×=,∴α=60°.故答案为:60.【点评】本题考查了特殊角的三角函数值,熟记30°、45°、60°角的正弦值、余弦值、正切值是解此类题目的关键.16.如图是一斜坡的横截面,某人沿着斜坡从P处出发,走了13米到达M处,此时在铅垂方向上上升了5米,那么该斜坡的坡度是i=1: 2.4 .【考点】解直角三角形的应用﹣坡度坡角问题.【分析】垂直高度、水平距离和坡面距离正好构成一个直角三角形,先根据勾股定理,求出水平距离,然后根据定义解答.【解答】解:由题意得,水平距离==12,∴坡比i=5:12=1:2.4.故答案为2.4【点评】本题考查的知识点为:坡度=垂直距离:水平距离,通常写成1:n的形式,属于基础题.17.用“描点法”画二次函数y=ax2+bx+c(a≠0)的图象时,列出了如下表格: x … 1 2 3 4 …y=ax2+bx+c … 0 ﹣1 0 3 …那么该二次函数在x=0时,y= 3 .【考点】二次函数的图象.【分析】根据题目提供的满足二次函数解析式的x、y的值,确定二次函数的对称轴,利用抛物线的对称性找到当x=0时,y的值即可.【解答】解:由上表可知函数图象经过点(1,0)和点(3,0),∴对称轴为x=2,∴当x=4时的函数值等于当x=0时的函数值,∵当x=4时,y=3,∴当x=0时,y=3.故答案是:3.【点评】本题考查了二次函数的图象的性质,利用表格找到二次函数的对称点是解决此题的关键.18.如图,△ABC中,AB=AC=5,BC=6,BD⊥AC于点D,将△BCD绕点B逆时针旋转,旋转角的大小与∠CBA相等,如果点C、D旋转后分别落在点E、F的位置,那么∠EFD的正切值是.【考点】旋转的性质;等腰三角形的性质;解直角三角形.【分析】作AH⊥BC于H,延长CD交EF于G,根据等腰三角形的性质和勾股定理求出AH、BD、CD、AD,根据旋转变换的性质得到∠FBD=∠CBA,证明FB∥AH,根据四点共圆得到∠EFD=∠GBD,求出tan∠GBD即可.【解答】解:作AH⊥BC于H,延长CD交EF于G,∵AB=AC,∴BH=CH=BC=3,由勾股定理得,AH==4,×BC×AH=×AC×BD,即6×4=5×BD,解得,BD=,∴CD==,AD=,∵∠FBD=∠CBA,∴∠FBE=∠DBC,∵∠DBC+∠C=90°,∠HAC+∠C=90°,∴∠FBE=∠BAH,∴FB∥AH,∴∠FBC=∠AHC=90°,∴EF∥BC,∴∠E=∠ABC=∠C=∠EGA,∴AG=AE=BE﹣AB=BC﹣AB=1,∴DG=,∴∠F=∠BDC=90°,∴F、B、D、G四点共圆,∴∠EFD=∠GBD,tan∠GBD==,∴∠EFD的正切值是,故答案为:.【点评】本题考查的是旋转变换的性质、等腰三角形的性质、锐角三角函数的应用,掌握旋转变换的性质、熟记锐角三角函数的概念是解题的关键.三、解答题(本大题共7题,满分78分)19.(10分)(2017•杨浦区一模)如图,已知△ABC中,点F在边AB上,且AF=AB、过A作AG∥BC交CF的延长线于点G.(1)设=, =,试用向量和表示向量;(2)在图中求作向量与的和向量.(不要求写作法,但要指出所作图中表示结论的向量)【考点】*平面向量;作图—复杂作图.【分析】(1)证△AGF∽△BCF得==,即AG=CB,由=()可得答案;(2)延长CB到E,使BE=AG,连接AE,则=.【解答】解:(1)∵AG∥BC,AF=AB,∴△AGF∽△BCF, =,∴==,即AG=CB,∴=()=﹣;(2)如图所示,==.【点评】本题主要考查相似三角形的判定与性质及向量的运算、作图,熟练掌握向量的基本运算法则是解题的关键.20.(10分)(2017•杨浦区一模)已知抛物线y=﹣x2+bx+c经过点B(﹣1,0)和点C(2,3).(1)求此抛物线的表达式;(2)如果此抛物线上下平移后过点(﹣2,﹣1),试确定平移的方向和平移的距离.【考点】待定系数法求二次函数解析式;二次函数图象与几何变换.【分析】(1)待定系数法求解可得;(2)求出原抛物线上x=﹣2时,y的值,若点(﹣2,﹣5)平移后的对应点为(﹣2,﹣1),根据纵坐标的变化可得其中的一种平移方式.【解答】解:(1)将点B(﹣1,0)、C(2,3)代入y=﹣x2+bx+c,得:,解得:,∴此抛物线的表达式为y=﹣x2+2x+3;(2)在y=﹣x2+2x+3中,当x=﹣2时,y=﹣4﹣4+3=﹣5,若点(﹣2,﹣5)平移后的对应点为(﹣2,﹣1),则需将抛物线向上平移4个单位.【点评】本题主要考查待定系数法求二次函数的解析式及抛物线的平移,熟练掌握待定系数法求二次函数的解析式是解题的关键.21.(10分)(2017•杨浦区一模)已知:如图,梯形ABCD中,AD∥BC,∠ABD=∠C,AD=4,BC=9,锐角∠DBC的正弦值为.求:(1)对角线BD的长;(2)梯形ABCD的面积.【考点】梯形;解直角三角形.【分析】(1)求出△ABD∽△DCB,得出比例式,即可得出答案;(2)过D作DE⊥BC于E,解直角三角形求出DE,根据面积公式求出即可.【解答】解:(1)∵AD∥BC,∴∠ADB=∠DBC,∵∠ABD=∠C,∴△ABD∽△DCB,∴=,∵AD=4,BC=9,∴BD=6;(2)过D作DE⊥BC于E,则∠DEB=90°,∵锐角∠DBC的正弦值为,∴sin∠DBC==,∵BD=6,∴DE=4,∴梯形ABCD的面积为×(AD+BC)×DE=×(4+9)×4=26.【点评】本题考查了相似三角形的性质和判定,梯形的性质,解直角三角形等知识点,能求出BD的长是解此题的关键.22.(10分)(2017•杨浦区一模)如图,某客轮以每小时10海里的速度向正东方向航行,到A处时向位于南偏西30°方向且相距12海里的B处发出送货请求,货轮接到请求后即刻沿着北偏东某一方向以每小时14海里的速度出发,在C处恰好与客轮相逢,试求货轮从出发到客轮相逢所用的时间.【考点】解直角三角形的应用﹣方向角问题.【分析】首先证明AC=AB=12,根据时间=路程÷速度,计算即可解决问题.【解答】解:如图,由题意,∠ABF=30°,∠CBF=60°,∴∠FAB=60°,∠ABC=∠C=30°,∴AC=AB=12,货轮从出发到客轮相逢所用的时间==1.2小时.答:货轮从出发到客轮相逢所用的时间1,2小时.【点评】本题考查解直角三角形的应用﹣方向角、等腰三角形的判定、路程、时间、速度之间的关系等知识,解题的关键是掌握方向角的定义,属于中考常考题型.23.(12分)(2017•杨浦区一模)已知:如图,在△ABC中,点D、G分别在边AB、BC上,∠ACD=∠B,AG与CD相交于点F.(1)求证:AC2=AD•AB;(2)若=,求证:CG2=DF•BG.【考点】相似三角形的判定与性质.【分析】(1)证明△ACD∽△ABC,得出对应边成比例AC:AB=AD:AC,即可得出结论;(2)由相似三角形的性质得出∠ADF=∠ACG,由已知证出△ADF∽△ACG,得出∠DAF=∠CAF,AG是∠BAC的平分线,由角平分线得出,即可得出结论.【解答】(1)证明:∵∠ACD=∠B,∠CAD=∠BAC,∴△ACD∽△ABC,∴AC:AB=AD:AC,∴AC2=AD•AB;(2)证明:∵△ACD∽△ABC,∴∠ADF=∠ACG,∵=,∴△ADF∽△ACG,∴∠DAF=∠CAF,即∠BAG=∠CAG,AG是∠BAC的平分线,∴,∴,∴CG2=DF•BG.【点评】本题考查了相似三角形的判定与性质以及角平分线的性质;熟练掌握相似三角形的判定与性质是解决问题的关键.24.(12分)(2017•杨浦区一模)在直角坐标系xOy中(如图),抛物线y=ax2﹣4ax+4a+3(a<0)的顶点为D,它的对称轴与x轴交点为M.(1)求点D、点M的坐标;(2)如果该抛物线与y轴的交点为A,点P在抛物线上且AM∥DP,AM=2DP,求a的值.【考点】抛物线与x轴的交点.【分析】(1)由y=ax2﹣4ax+4a+3=a(x﹣2)2+3,可得顶点D(2,3),M(2,0).(2)作PN⊥DM于N.由△PDN∽△MAO,得===,因为OM=2,OA=﹣4a﹣3,PN=1,所以P(1,a+3),DN=﹣a,根据OA=2DN,可得方程﹣4a﹣3=﹣2a,由此即可解决问题.【解答】解:(1)∵y=ax2﹣4ax+4a+3=a(x﹣2)2+3,∴顶点D(2,3),M(2,0).(2)作PN⊥DM于N.∵AM∥DP,∴∠PDN=∠AMG,∵DG∥OA,∴∠OAM=∠AMG=∠PDN,∵∠PND=∠AOM=90°,∴△PDN∽△MAO,∴===,∵OM=2,OA=﹣4a﹣3,PN=1,∴P(1,a+3),∴DN=﹣a,∵OA=2DN,∴﹣4a﹣3=﹣2a,∴a=﹣.(当点A在y的正半轴上时,方法类似,求得a=﹣).【点评】本题考查抛物线与x轴的交点、相似三角形的判定和性质等知识,解题的关键是灵活运用所学知识解决问题,学会利用相似三角形的性质解决问题,用方程的思想思考问题,属于中考常考题型.25.(14分)(2017•杨浦区一模)在Rt△ABC中,∠ACB=90°,AC=BC=2,点P为边BC上的一动点(不与B、C重合),点P关于直线AC、AB的对称点分别为M、N,连接MN交边AB 于点F,交边AC于点E.(1)如图1,当点P为边BC的中点时,求∠M的正切值;(2)连接FP,设CP=x,S△MPF=y,求y关于x的函数关系式,并写出定义域;(3)连接AM,当点P在边BC上运动时,△AEF与△ABM是否一定相似?若是,请证明;若不是,请求出当△AEF与△ABM相似时CP的长.【考点】相似形综合题.【分析】(1)先求出CP=1,利用对称得出∠MB N=90°,BP=BP=3,最后用锐角三角函数的定义即可;(2)先求出FG,再利用同角的三角函数相等,得出PG,再用三角形的面积公式求解即可;(3)利用对称先判断出AM=AP=AN,进而得出三角形AMN是等腰直角三角形,即可得出∠AMN=45°,得出∠AFE=∠AMB,即可判断出△AEF∽△BAM.【解答】解:(1)如图1,连接BN,∵点P为边BC的中点,∴CP=BP=BC=1,∵点P与点M关于AC对称,∴CM=CP=1∵∠ACB=90°,AC=BC=2,∴∠BAC=∠ABC=45°,∵点P与点N关于AB对称,∴BP=BN=1,∠ABN=∠ABC=45°,∴∠CBM=90°,BM=CM+BC=3,在Rt△MBN中,tan∠M==;(2)如图2,过点F作FG⊥BC,设PG=m,∴BG=BP﹣PG=2﹣x﹣m,MG=MP+PG=2x+m,在Rt△BFG中,∠FBG=45°,∴FG=BG=2﹣x﹣m,在Rt△FMG中,tan∠M==,在Rt△MNB中,tan∠M==,∴,∴m=,∴y=S△MPF=MP•FG=×2x×=(0<x<2);(3)△AEF∽△BAM理由:如图3,连接AM,AP,AN,BN,∵点P关于直线AC、AB的对称点分别为M、N,∴AM=AP=AN.∠MAC=∠PAC,∠PAB=∠NAB,∵∠BAC=∠PAC+∠PAB=45°,∴∠MAN=∠MAC+∠PAC+∠BAP+∠NAB=2(∠PAC+∠PAB)=90°,∴∠AMN=45°=∠ABC,∵∠AFE=∠ABC+∠BMF,∠AMB=∠AMN+∠BMF,∴∠AFE=∠AMB,∵∠EAF=∠ABM=45°,∴△AEF∽△BAM.。

2017年上海杨浦区初三一模物理试卷答案

2017年上海杨浦区初三一模物理试卷答案

用管子吸饮料注射器018/12/052018/12/05离心式水泵D.茶壶答 案解 析DA.用管子吸饮料是利用了大气压的作用,不符合连通器的特点,不合题意;B.注射器吸药液时是利用了大气压的作用,不符合连通器的特点,不合题意;C.离心式水泵在工作时是利用了大气压的作用,不符合连通器的特点,不合题意;D.答 案解 析A由题意可知,开关串联接在电路中,共同控制电动机的工作,故A符合题意,BCD不符合题意.任一只手柄刹车时,该手柄上的开关立即断开、电动机停止工作说明两开关相互影响、不能独立工作即为串联.学生版 教师版>ρAD.4:3电压表示数变小,电流表示数变小,两个电表示数都变小的位置互换,电压表测量电源电压,保持不变,电流表测量干路电流,滑片向右移动,电阻变大,电流减小,由并联电路电流规律可知,电流表的示数减小;故ABh i.i zh ik an g .c om2018/12/0514.1.2.3.答 案解 析我国自主研发的“蛟龙号”深海潜水器曾潜到海面下米的深度.如图,当它下潜到上表面距海面米静止时,海水对潜水器上表面产生的压强约为 帕(海水密度近似等于淡水密度).当潜水器继续下降时,海水对潜水器上表面产生的压强将 ,潜水器受到的浮力将 (选填“变大”、“不变”或“变小”).变大不变()深度受到海水的压强为:;()潜水器在水面下不断下潜的过程中,水的密度不变,因为,潜水器所处的深度变大,所以,潜水器受到的水的压强变大,因此受水的压力也变大;因为,排开水的体积不变,所以,潜水器受到的浮力不变.()根据公式求出海水的压强;()潜水器在水面下不断下潜的过程中,排开水的体积不变、所处深度变大,但水的密度不变,利用液体压强公式和阿基米德原理的推导公式分析判断.本题考查了学生对阿基米德原理、液体压强公式的掌握和运用,得出排开水体积的变化和深度变化是突破口.故答案为:;变大;不变.7062109.8×10411000m p =gh =1.0×kg/×9.8N/kg ×10m =9.8×Pa ρ海水103m 31042ρp =ρgh h =ρg F 浮V 排1p =ρgh 2p =gh ρ液=g F 浮ρ液V 排9.8×104可知,电源电压一定时,电路总电阻越小,电路中电流越大,车重表的示数越大.=URga甲p1)液体产生的压强与液体密度和物体所处深度有关,由于乙图中木块所处深度大于甲图中木块所处深,同一木块重力相=G测总电压,电流表测电路中的电流.两端的电压,则示数一定和电流表无示数,故障可能测总电压,电流表测电oaijj i ao sh i .i zh ik a明确力的三要素,再确定一个标度,并用这个标度去准确表示出力的大小.如图所示:在如图所示电路的〇里填上适当的电表符号,使之成为正确的电路.由电路图可知,无论两处位置是哪种电表,两灯泡都不会出现串联,因此,要使两灯泡都能工作,则两灯泡只能并联,则左边的圈应为电流表,中间的圈应为电压表,如图所示.故答案为:.在图中,请用笔画线代替导线正确连接线路,要求灯根据实物电路连接要求,本题的开关应是干路开关,灯并联,电流表与串联.L 1L 1教师版 答案版j i ao shi .i z hi k an g .co m 如图所示:漂浮在水面上的冰块浸入水中的体积为,求冰块受到的浮力冰块受到的浮力:冰块浸入水中的体积即为排开水的体积,根据阿基米德原理求出冰块受到的浮力.本题考查了阿基米德原理的应用,是一道基础题目.故答案为:.5×10−3m 3g =1.0×kg/×9.8N/kg V 排103m 349N 在图所示的电路中,电源电压为伏且不变,电阻为支路,开关位于支路.的电流不变,则电流表的示数:12R 2S R 1A 2 答案版m2018/12/05在保证电路中各元件不损坏的情况下,求连入电路的取值范围.根据欧姆定律的变形公式求出电压表的示数;得,定值电阻两端的电压:.先根据串联电路电压规律求出滑动变阻器两端的电压,再根据欧姆定律的变形公式求出此时根据串联电路电压规律可知,滑动变阻器两端的电压:,的电阻值:.根据①②可判断电表选择的量程,结合滑动变阻器允许通过的最大电流,得出电路中的最大电流和滑最后利用串联电路电压规律和欧姆定律求出滑动变阻器连入电路的最小阻值和最大阻值,从而得,电压表、选择的量程为,在保证电路中各元件不损坏的情况下,所以电路中的电流最大电流得,定值电阻据串联电路电压规律可知,滑动变阻器两端的电压:V 1U 1R 1==1A ×5Ω=5V U 1R 116V −5V =11V R 2=11ΩR 2V 1V 2I =URj i ao s hi .i zh i k an g .co m 20图甲中,为了研究压力的作用效果与哪些因素有关,某同学把铅笔压在大拇指和食指之间,感觉食指比大拇指痛,说明: .图乙中,两支恰好能套在一起的试管,在较大的试管中注入约的水,将较小的试管插入大试管中,然后迅速把它们一起倒过来.会观察到:小试管会 .装置丙可以用来验证 .装置丁可以用来探究 的规律.压力相等时,受力面积越小,压力作用效果越显著因为力的作用是相互的,所以大拇指和食指受到的压力大小相等;由图知,食指比大拇指痛受力面积小,感觉食指比大拇指痛,说明:压力相等时,受力面积越小,压力作用效果越显著.故答案为:压力相等时,受力面积越小,压力作用效果越显著.向上运动大试管中注水并插入小试管后,水填充了小试管和大试管底部之间的部分,迅速倒过来,水会在自身重力的作用下,从两个试管壁之间的空隙流动,从而在小试管底部形成一部分真空区域,在大气压的由称重法知,丙图中两次弹簧测力计示数之差的大小等于物体受到的浮力,即1/3答案版h i.i zh ik an g .c om2018/12/05;,从图中读出浸入物块后总体积为;为了得到物体质量与体积的关系,要进行多次测量,具体做法:应测量多组数据.为了得到可靠的结论,还要选择多种物质的物块进行实验.;多组;多种.20g +1.4g =21.4g 40cm 330ml =30cm m 3如图所示,小明调整后的电路中有两根导线尚未连接,请用笔画线代替导线补上.小明在做“用电流表、电压表测电阻”的实验,实验器材齐全且完好,电源电压不高于骤正确,闭合电键后,观察到电压表恰好满刻度.经过思考后,为了精确读数,他断开电键,适当调整电路,闭合电键后,伏,电流表示数的变化范围为点时,观察到电压表、电流表示数如图所示.(②、③、④题写出计算过程,电阻平均值精确到j i ao sh i.i zh ik an g.co m2实验中的电源电压为 伏,滑动变阻器的最大电阻值为 欧.1.2.点在滑动变阻器中点位置的 侧(选填“左”或“右”).在第次实验操作中,他正确连接实验器材,说明滑动变阻器连入电路中的电阻最大,且电压表并联在待测电阻的两端,实验步骤正确,闭合电键后,观察到电压表恰好满刻度,因电源电压不高于伏.所以此时电压表选用的是在第次实验操作中,他断开电键,适当调整电路,闭合电键后,在移动变阻器滑片到电压表示数的最大值为伏,由第不可能接在电源的两端,只能并联在变阻器的两端,实物图的连接如下图所示:故答案为:.因此时变阻器的电压最大,根据分压原理,变阻器的全部电阻连入了电路中,次实验操作,因电源电压保持不变,此时定值电阻的电压为,根据串联电路电压的规律,;此时因电路的总电阻最大,根据欧姆定律,所以对应的电流最小,,变阻器的最大阻值故答案为:;.当变阻器滑片移到点时,观察到电压表、电流表示数如图所示,因电表均选用小量程,电压表分度值为,示数为10−3V 2 1.54.55=1.5V U 滑13V =3V +1.5V =4.5V ==R 滑U 滑1I 1 1.5V0.3A 4.55P a 教师版 答案版j i ao sh i.i zh ik an g .c om2018/12/0531.(1)分析比较实验序号 的数据及相关条件初步得出:玻璃管竖直插入同种液体中,使薄片恰好下落时管内水的深度与管口面积无关.答 案解 析在学习了液体压强知识后,某小组同学对如图所示实验产生了兴趣,他们想继续探究实验中使薄片恰好下落时管内水的深度与什么有关.他们在液体槽中装入甲液体,在两端开口、粗细均匀的玻璃管的下端贴一个比管口稍大的塑料薄片,并将玻璃管竖直插入液体槽中,然后顺着管壁从上端开口处向管内缓缓注水,直至观察到薄片恰好脱离管口下落.记录玻璃管的管口面积、槽中液体密度和玻璃管插入液体的深度,管中水的深度.接着改变深度、槽中液体的种类和玻璃管的粗细,重复实验,所有数据均记录在下表.(薄片的重力、玻璃管的厚度忽略不计)实验序号槽中液体密度深度管口面积水的深度、(或、)探究在同一种液体中,薄片恰好下落时管内水的深度与管口面积的关系,要控制槽中液体密度和玻璃管插入液体的深度不变,只改变玻璃管的管口面积,故应选择实验序号、(或、);故答案为:()、(或、).H 水S ρh H 水h ρ(×kg/)103m 3h (m)S (×)10−4m 2(m)H 10.80.150.0820.250.1630.350.2440.3100.245 1.00.0650.0660.150.1070.1650.1680.250.209 1.20.0530.06100.130.12110.230.24120.280.24H 水S 341112S ρh S 3411121341112。

2017学年第一学期杨浦区高三英语一模试卷答案.pdf

2017学年第一学期杨浦区高三英语一模试卷答案.pdf

杨浦区2017学年度第一学期高三模拟质量调研英语学科试卷2017. 12 本试卷分为第I卷(第1-11页)和第II卷(第12页)两部分。

全卷共12页。

满分140分。

考试时间120分钟。

考生注意:1.答第I卷前,考生务必将条形码粘贴在答题纸的指定区域内。

2. 第I卷(1-20小题,31---70小题)由机器阅卷,答案必须全部涂写在答题卡上。

考生应将代表正确答案的小方格用铅笔涂黑。

注意试题题号和答题卡编号一一对应,不能错位。

答案需要更改时,必须将原选项用橡皮擦去,重新选择。

答案写在试卷上一律不给分。

第I卷中的第21-30小题,IV. Summary Writing部分和第II卷的试题,其答案用钢笔或水笔写在答题纸的规定区域内,如用铅笔答题,或写在试卷上则无效。

第I卷(共100分)I. Listening ComprehensionSection ADirections: In Section A, you will hear ten short conversations between two speakers. At the end of each conversation, a question will be asked about what was said. The conversations and the questions will be spoken only once. After you hear a conversation and the question about it, read the four possible answers on your paper, and decide which one is the best answer to the question you have heard.1. A. In a professor's office. B. In a second-hand book shop.C. In a library.D. In a hospital.2. A. 10 yuan. B. 20 yuan.C. 30 yuan.D. 50 yuan.3. A. House agent and customer. B. Shop assistant and customer.C. Car mechanic and car owner.D. Employer and employee.4. A. The man doesn't believe what the woman says.B. The weather report spoils the man's good mood.C. They will cancel the hiking due to the bad weather.D. The man thinks it unnecessary to give up the adventure.5. A. She always talks bad about her colleagues.B. She has a good reputation among her colleagues.C. She is good at handling complicated relationships.D. She has good relations with her colleagues and boss.6. A. Harmony in a community. B. Safety in the neighborhood.C. Preparation for Christmas.D. Ways to save electricity.7. A. Watching advertisements may help ease eyestrain(眼疲劳).B. It's a great chance to break the habit of watching TV.C. The advertisements are long enough for her to have a nap.D. Focusing eyes on the screen for a long time is harmful to eyes.8. A. The man decides to go home by rail.B. Most people travel by car during the festival.C. Most people arrive beyond the scheduled time.D. The man will have a sound sleep on the bus.9. A. He is not a bit overweight.B. He likes his fitness instructor.C. She has set too many rules for him.D. She should talk with his personal trainer.10. A. Greeks are not allowed to get married before 18.B. Greek kids are not as independent as American kids.C. American parents don?t pay for children's wedding.D. Greek parents will take care of children until they are 18.Section BDirections: In Section B, you will hear several longer conversation(s) and short passage(s), and you will be asked several questions on each of the conversation(s) and the passage(s). The conversation(s) and passage(s) will be read twice, but the questions will be spoken only once. When you hear a question, read the four possible answers on your paper and decide which one would be the best answer to the question you have heard.Questions 11 through 13 are based on the following passage.11. A. The burn is 20 millimeters across.B. The burn is small but very painful.C. The burn takes away the victim's feeling.D. The burn is small but the skin is damaged.12. A. Use a clean plastic bag to keep warm.B. Bind up the burn with bandage or cloth.C. Treat the burned area with cold running water.D. Flush(冲洗)the burn with ice water for several minutes.13. A. To avoid infection. B. To ease pain.C. To speed recovery.D. To reduce stickiness.Questions 14 through 16 are based on the following passage.14. A. A cell phone. B. A leather wallet.C. A mini camera.D. An alarm clock.15. A. The wallet will sound an alarm.B. It will track the thief with GPS system.C. It will contact the bank to block balance.D. Its owner will receive a picture of the thief.16. A. It's out-dated in this digital age.B. It can text messages automatically.C. It is a multifunctional wallet.D. It is unique in appearance and function.Questions 17 through 20 are based on the following conversation.17. A. The concert is beyond her curfew(宵禁).B. She can?t go out on school night.C. Her mother is not available.D. She doesn?t like the band.18. A. His parents set a strict rule for him.B. His parents don?t care when he is back.C. He is self-disciplined and trustworthy.D. He envies those who have curfews.19. A. Promoting maturity. B. Giving sense of security.C. Improving sense of responsibility.D. Discouraging independence.20. A. It?s a severe punishment. B. It?s for her good.C. It?s a ridiculous practice.D. It?s an exceptional case.II. Grammar and VocabularySection ADirections: After reading the passage below, fill in the blanks to make the passages coherent and grammatically correct. For the blanks with a given word, fill in each blank with the proper form of the given word; for the other blanks, use one word that best fits each blank.It?s interesting when you think about how Japan is a nation (21) ______ appreciates the virtues of silence and good manners, and yet when it comes to eating noodles, Japanese people can be (22) ______ (loud) in the world.According to lifestyle website grapee.jp, slurping(发出"哧溜"声) when eating noodles (23) ______ (encourage) in Japanese culture. It?s believed that taking air into your mouth (24) ______ enhance the flavor of the noodles, and that it helps cool down the noodles. It?s also considered to be a way to show appreciation for the dish. Sometimes, just making the noise alone seems to make the noodles more enjoyable.It wasn?t until a new expression –“noodle harassment(骚扰)”-- came out last year on social media (25) ______ Japanese people started to realize that the slurping noise is making some foreign visitors uncomfortable.(26) ______ a response, Japanese i nstant noodle maker Nissin introduced a so-called noise-canceling fork last month. The fork, which looks like an electric toothbrush, is connected wirelessly to a smart phone. When the person using the fork starts to slurp, the fork sends a signal to the person?s phone, (27) ______ (make) it play a sound to mask the slurping noise.But is it really necessary? Dining traditions do vary. (28) ______ is considered to be proper table manners in one country is likely to be seen as rude in another. In India, people eat with their hands (29) ______ they think in this way they build a connection with the food. However, people who are used to eating with forks might find it uncomfortable to get their hands (30) ______ (cover) in oil and bits of food. But this eating method is part of Indian's culture, just like Japan's slurping is part of its own.“So, if your are eating noodles, whether that?s ramen, uudon, or soba, please slurp,” wrote reporter Brian Ashcraft on blog Kotaku. “If anyone gets annoyed while”you are doing that, pay them no mind because they're missing the point entirely.Section BDirections: Fill in each blank with a proper word chosen from the box. Each word can only be used once. Note that there is one word more than you need.A. tissueB. treatedC. potentialD. engineeringE. environmentF. limitedG. procedure H. commercial I. promising J. expanding K. internalScientists have developed a new surgical glue that could transform emergency treatments by sealing up critical wounds in the skin or the organs, without the need for staples or sutures(钉合或缝合).It?s called MeTro. It was developed by researchers from both Harvard Medical School and the University of Sydney, led by Nasim Annabi, an assistant professor of chemical __31__. The glue is made from a modified(改良的)human protein that responds to UV light, allowing the application and drying of the gel-like substance in just a minute.According to the international team of researchers behind the glue, it could quite literally be a lifesaver, sealing up wounds in 60 seconds without stopping the natural __32__ and relaxing of the organ or the skin it?s applied to. Wounds __33__ with MeTro can heal up in half the time compared with stitches or staples, the researchers claim, and if surgery is required then MeTro can simplify that __34__ too. It's also one of several ways researchers are exploring to engineer our body's own natural substances to help repair it when needed.The __35__ applications are powerful – from treating serious __36__ wounds at emergency sites such as following car accidents and in war zones, as well as improving hospital surgeries.MeTro is simple to apply, can be easily stored, and works closely with natural __37__ to heal a wound. What?s more, it degrades without leaving any kind of poisonous leftovers in the body.For now the trials are __38__ to animal models. But human trials are in the works, and the results to date are incredibly __39__. If the MeTro can be further developed into a __40__ product, it could become an esse ntial part of a first responder?s toolkit. III. Reading ComprehensionSection ADirections: For each blank in the following passage there are four words or phrases marked A, B, C and D. Fill in each blank with the word or phrase that best fits the context.Competition is good for businesses. In the world of navigation(导航)systems, however, competition is also a necessity --- it may not be wise to rely on foreign systems for positioning and tracking services. Now, ___41___ remarkable accuracy and reliability, China?s BeiDou system has made its presence felt.The BeiDou project was set up in 1994. The first BeiDou satellite was not launched until 2000. Now, ___42___, there are already more than 20 BeiDou satellites in orbit (轨道) . They form a ___43___ network that provides positioning, navigation and timing services for China and several other Asian countries.-grown" system is now ___44___ a major upgrade. Earlier this month, This “hometwo BeiDou-3 satellites, the first of China?s m ost powerful ___45___of navigation satellites, were launched into space. T he launch marks the beginning of the global___46___ of the BeiDou navigation system. Over the next three years, China plans to send up 30 more BeiDou-3 satellites; The expanded navigation system will ___47___ create a network that is able to support military and civilian applications around the world.Scientists involved in the project said the new system would give civilian users an accuracy of 2.5 meters to five meters, overtaking that of the ___48___ positioning technologies. BeiDou?s chief designer said the new satellites would be able to__49___ which lane a car is using on a motorway and __50___ the swing of a building in high winds. It will also be able to guide fire trucks to the nearest water hydrant (消防栓).The Chinese military, meanwhile, will be able to use coded signals for millimeter(毫米)___51___ .China is only the third country in the world to develop a navigation system on its own, after the United States (GPS) and Russia (GLONASS). Developing BeiDou is a necessity. The system __52___ national security by ending a reliance on foreign systems. Moreover, it enhances China?s international reputation for technological ___53___.For most of us, the benefits of the new satellite system will be felt in a couple of years when more phones are ___54___ with BeiDou chips (芯片). Many smartphones today still use GPS and GLONASS. That?ll soon change with the development of BeiDou. One product manager ___55___ most smartphones to be able to receivemay still say ,I?m using GPS?, BeiDou signals. He says: “In three years? time, peoplebut in fact, their phone is tune in t o BeiDou. ”41. A. dominating B. boasting C. shifting D. inputting42. A. however B. afterwards C. moreover D. therefore43. A. continental B. local C. domestic D. regional44. A. enduring B. encountering C. undergoing D. processing45. A. generation B. information C. examination D. revolution46. A. extension B. expansion C. interaction D. invasion47. A. objectively B. eventually C. sufficiently D. essentially48. A. existing B. progressing C. upcoming D. everlasting49. A. explore B. investigate C. spot D. remind50. A. detect B. prevent C. protect D. adjust51. A. privacy B. accuracy C. fluency D. currency52. A. convinces B. insures C. highlights D. strengthens53. A. innovation B. consumption C. emission D. exhibition54. A. decorated B. furnished C. equipped D. connected55. A. respects B. instructs C. inspects D. expects Section BDirections: Read the following three passages. Each passage is followed by several questions or unfinished statements. For each of them there are four choices marked A, B, C and D. Choose the one that fits best according to the information given in the passage you have just read.A Swedish power plant is taking reuse and recycle to the next level by burningunusable clothing instead of coal, Bloomberg reports.Retail giant Hennes & Mauritz, more commonly known as H&M, is helping theutility transition away from coal through its moldy (发霉的) or otherwise unsalableclothing.The multi-fuel power and heating station in V?ster?s, central Sweden, isplanning to be completely fossil-fuel free by 2020. It?s the largest station of its kindand Sweden claims it?s one of Europe?s cleanest. To kick its coal habit, the station isturning instead to other burnable materials including recycled wood, rubbish and yes,clothes.“Our goal is to use only renewable and recycled fuels,” Jens Neren, head of fue supplies at the utility company which owns and operates the V?ster?s plant, toldBloomberg.Johanna Dahl, head of communications for H&M in Sweden, told Bloombergthat the company allows only the burning of clothes which are no longer safe to use.“It is our legal obligation to make sure that clothes that contain mold or do notmeet the requirements of our strict restriction on chemicals are destroyed,” she said.The V?ster?s plant has burned around 15 tons of old H&M clothes so far thisyear, compared with about 400,000 tons of rubbish, Neren told Bloomberg.Sweden has one of the world?s greener energy generating systems, and hasinvested in bioenergy, solar power and electric buses. In 2015, the Scandinaviancountry announced an ambitious aim to become one of the first nations in the world toend its dependence on fossil fuels. According to the Swedish government, the countryhas already heavily reduced its dependence on oil, which accounted for 75% of theenergy supply in 1970, and now makes up a 20% share.56. Which of the following can serve as fuel in the V?ster?s plant?A. Fashionable coats in H&M chain store.B. Old TV sets deserted as rubbish.C. Wooden furniture in second-hand shop.D. H&M clothes unsuitable for sale.57. The underlined word in the last paragraph “generating” is closest in meaning to______.A. eliminatingB. adjustingC. producingD. circulating58. What can we learn from the passage?A. The Swedish government discourages the development of bioenergy.B. Clothes only take up a small proportion of the burning material.C. Sweden?s fossil-fuel free plan is almost accomplished by now.D. Sweden has an ambition to be the cleanest country in the world.59. What is the main idea of the passage?A. A Swedish power plant is burning unusable H&M clothes for fuel.B. The Swedish government aims high and is taking effective action.C. H&M is looking for a new way to strengthen its position in fashion.D. Coal and oil are no longer regarded as the primary fuels in Sweden.RAINFOREST ADVENTURE TIPS1.Find out about the trail and surroundings, be sure thatyou have enough time to complete the entire route before darkness falls. Do not stray off the path to chase after animals.e good judgment regarding the fitness level requiredfor the trek(徒步跋涉), and know your physical limits.3.Always inform the park officials or let someone knowof your plans and destination for the day, especially ifgoing alone.4.Take plenty of water and pack a few easy to eat snacksto keep energy level up. Unless trekking with a local guide, it is not advisable to eat jungle fruit or drink from any water source.5.Be as quiet as possible to avoid scaring any wildlife.Getting an early start during the dawn provides the best chance to sight animals seeking food and the warmth of the early morning sun.6.Wear thin, loose, preferably cotton clothing to remaincomfortable.7.Cover arms and legs with long trousers andlong-sleeved shirts to ward off mosquitoes and to provide protection against thorny plants.8.Be prepared for sudden rain showers by carrying aponcho that wraps over both body and your carrying pack to keep everything dry.9.Choose footwear with proper ankle support and goodtraction.10. A wide brimmed hat helps to shade a trekker from theheat of the tropical sun.60. Before an adventure, a trekker should ______.A. tell the park officials his destination and time scheduleB. pack up some jungle fruit juice and pre-cooked mealsC. consult a local guide about the most adventurous routeD. have his fitness level assessed at the tourist center61. Which of the following is NOT suitable for a rainforest trekking?A. Long-sleeved cotton shirts.B. Tight sports shorts.C. Hiking boots.D. A wide brimmed hat.62. If a trekker starts out at dawn, he may ______.A. escape being caught in the rainB. sight scared wildlifeC. enjoy the heat of the tropical sunD. see animals seeking food(C)The largest genetic study of mosquitoes has found their ability to resist insecticides is evolving rapidly and spreading across Africa, putting millions of people at higher risk of contracting m alaria(疟疾).British scientists who led the work said mosquitoes' growing resistance to control tools such as insecticide-treated bed nets and insecticide spraying, which have helped cut malaria cases since 2000, now threatens “to disturb malaria control” in Africa.“Our study highlights the severe challenges facing public efforts to controlsaid Martin Donnelly of mosquitoes and to manage and limit insecticide r esistance,” the Liverpool School of Tropical Medicine, who worked on the study with a team from Britain?s Wellcome Trust Sanger Institute.Latest World Health Organization (WHO) data show that 216 million people were infected last year with the malaria parasite(寄生虫), which is transmitted by blood-sucking Anopheles mosquitoes.The disease killed 445,000 people in 2016, and the majority of them were children in sub-Saharan Africa.To understand how mosquitoes are evolving, the researchers sequenced the DNA of 765 wild Anopheles mosquitoes taken from 15 locations across eight African countries. Their work, published in the journal Nature on Wednesday, created the largest data resource on natural genetic variation for any species of insect.Analyzing the data, the scientists found that the Anopheles gambiae mosquitoes (冈比亚疟蚊)were extremely genetically d iverse(多样化的) compared with most other animal species. T his high genetic diversity enables rapid evolution, they said, and helps to explain how mosquitoes develop insecticide resistance so quickly.The data also showed the rapid evolution of insecticide resistance appeared to be due to many previously unknown genetic variants(变体)within certain genes. The scientists said these genetic variants for insecticide resistance were not only emerging independently in different parts of Africa, but were also being spread across the continent by mosquito migration.Michael Chew, an expert at Britain?s Wellcome Trust global health charity which helped fund the research, said the finds underlined the importance of pushing scientific research ahead to control malaria.Global efforts to control malaria through effective vaccine, insecticides and the best drug combinations require urgent, united action by scientists, drug companies, governments and the WHO.63. Which of the following is scientists? headache?A. The number of mosquitoes in Africa is growing rapidly.B. Some genetic variants of mosquitoes are still unknown.C. The existing insecticides aren?t as effective as they used to be.D. Millions of African people have resistance to medicines for malaria.64. Malaria cases can be cut by ______.A. threatening drug companiesB. spraying insecticidesC. limiting blood donationD. transmitting data65. What CANNOT be concluded from the passage?A. Children are more likely to be bit by mosquitoes.B. Many previously unknown variants are found in the study.C. The mosquito migration contributes to the spread of variants.D. Anopheles mosquitoes have great genetic diversity.66. Which is FALSE about the genetic study of mosquitoes?A. It created the largest data on natural genetic variation for any insect species.B. It found the possible causes for the rapid evolution of insecticide resistance.C. It discovered where the genetic variants emerged and how they were spread.D. It highlighted the public efforts and appealed to limit the use of insecticides.Section CDirections: Read the following passage. F ill in each blank with a proper sentence given in the box. Each sentence can be used only once. Note that there are two more sentences than you need.A. But despite its popularity, experts warn that biometrics might not be as secure aswe?d imagined.B. Security experts don?t think it absolutely necessary to use biometric technology.C. But using multiple security measures is the best defense.D. Now, this type of technology might not be far away.E. If a person?s b iometric information is stolen, that could have extremely seriousconsequences for that individualF. The chance that a random person could look at your iPhone X and unlock it withhis face is about one in a million.Imagine you're standing in line to buy an afterschool snack at a store. You step up to the counter and the cashier scans your food. Next, you have to pay. But instead of scanning a QR code with your smartphone, you just hold out your hand so the cashier can scan your fingerprint. Or, a camera scans your face, your eyes or even your ear.__________67__________ As technology companies move away fromtraditional password, biometric(生物识别)security, which includes fingerprint, face and voice ID, is becoming increasingly popular.In 2013, Apple introduced the iPhone 5s, one of the first smartphones with a fingerprint scanner. Since then, using one?s fingerprint to unlock a phone and make mobile payments has become commonplace, bringing convenience to our lives. And since last year, Samsung has featured eye-scanning technology in its top smartphones, while Apple?s new iPhone X can even scan a user?s face.__________68__________ “Biometrics, ideally, are good,”John Michener, a biometric expert, told tech website Inverse. “In practice, not so much.”When introducing the new iPhone?s Face ID feature at Apple?s Keynote Event in September, Phil Schiller, Apple?s senior vice president, said, “__________69__________”But it?s already been done. In a video posted on community website Reddit on Nov 3, two brothers showed how they were each able to unlock the same iPhone X using their own face, Quartz reported. And they aren?t even twins.“We may expect too much from biometrics,”Anil Jain, a computer science professor at Michigan State University, told CBS news. “No security systems are perfect.”Earlier this year, Jain found a way to trick biometric security. Using a printed copy of a thumbprint, she was able to unlock a dead person's smartphone for police.“It?s good to see biometrics being used more,” Jain told CBS News, “because it adds another factor for security. __________70__________”IV. Summary WritingDirections: Read the following passage. Summarize the main idea and the main point(s) of the passage i n no more than 60 words. Use your own words as far as possible.It?s a common sight to see food delivery workers riding electric bikes through big cities in China. Most of them seem to be in a hurry, as they run red lights to deliver their meals in time. However, such reckless(鲁莽的)behavior often causes serious problems.In the first half of this year, food delivery drivers had 76 traffic accidents in Shanghai alone, according to the Shanghai Public Security Bureau. This means thaton average, there is a food delivery worker that gets hurt or even dies on the road in Shanghai every 2.5 days.Other cities also share similar problems. In Nanjing, three people died and 2,473 were injured in road accidents related to food delivery workers in the same period, according to the Ministry of Public Security.The rise of reckless behavior among food delivery workers is closely related tothe growing demand for their service, reported People?s Daily. About 150 million people in China use food delivery services, according to China Radio International (CRI). Such a big market has led to a large demand for food delivery workers, with some companies offering high salaries to attract new workers.However, food delivery workers are often under high pressure from their employers. They face company fines of 20 yuan for delivering food late and upwards of 200 yuan for receiving complaints, reported CRI. Moreover, the more orders they take, the more commission(佣金)they can earn, leading to some workers checking their mobile phones for new orders while they're riding their bikes.While most companies have measures requiring delivery workers to follow traffic rules, “there remains a problem of whether these requirements and rules for delivery workers are truly entering their ears, brains and hearts,” Wang Liang, deputy head of the Traffic Police Security Bureau, told news website The Paper.To solve the problem, some cities have taken action. Shanghai has asked companies to train their workers on traffic rules and safety. Now in Shenzhen, i f a delivery worker gets caught breaking traffic rules more than twice, he or she will be banned from driving food delivery vehicles for a whole year.第II卷(共40分)I. TranslationDirections: Translate the following sentences into English, using the words given in the brackets.1.这个比赛旨在鼓励年轻人继承中国文化的传统。

上海市杨浦区2017年初三数学一模考试试题及答案

上海市杨浦区2017年初三数学一模考试试题及答案

杨浦区2016学年度第一学期期末试卷数学试卷 1/10(时间:100分钟,满分150分)一、选择题:(6×4=24分))) ) 8.抛物线22(+4y x =)的顶点坐标是____________9.函数2(0)y ax a =>中,当0x <时,y 随x 的增大而___________10. 如果抛物线2(0)y ax bx c a =++≠过点(1,2)-和(4,2),那么它的对称轴是直线________11.如图,在△ABC 中,点D 、E 、F 分别在边AB 、AC 、BC 上,且DE ∥BC ,EF ∥AB ,:1:3DE BC = ,那么:EF AB 的值为_______5 ⑴设AB a = ,AC b =,试用向量a 和b 表示向量AG ;⑵在图中求作向量AG 与AB的和向量.(不要求写作法,但要指出所作图中表示结论的向量)ABCDEF第11题第16题第12题ABCDO第19题图ABFG20.已知抛物线2y x bx c =-++经过点B (1,0)-和点C (2,3) ⑴求此抛物线的表达式;⑵如果此抛物线上下平移后过点(2,1)--,试确定平移的方向和平移的距离。

与第23题图BCG 东24.(本题12分)在直角坐标系xOy 中,抛物线()24430y ax ax a a =-++<的顶点为D ,它的对称轴与轴交点为M. 25.(第25题图2017年杨浦区数学一模答案一、选择题1.D2.B3.D4.C5.C6.B 二、填空题7.(4,0)- 9.减小 10. 3x = 11. 2 12. 1 13. 20 14.4b)19. 20. 21. 22. 23. 得25.AFM AMC ∠=∠(或联结AP,AN,得△AMN 为等腰直角三角形,45AME ∠=︒)。

杨浦区中考数学一模及答案精编版

杨浦区中考数学一模及答案精编版

杨浦区2017学年度第一学期期末质量调研初 三 数 学 试 卷 2018.1(测试时间:100分钟,满分:150分)考生注意:1.本试卷含三个大题,共25题.答题时,考生务必按答题要求在答题纸规定的位置上作答,在草稿纸、本试卷上答题一律无效.2.除第一、二大题外,其余各题如无特别说明,都必须在答题纸的相应位置上写出证明或计算的主要步骤.一、选择题:(本大题共6题,每题4分,满分24分) 1.如果5x =6y ,那么下列结论正确的是( )(A ):6:5x y =; (B ):5:6x y =; (C )5,6x y ==; (D )6,5x y ==.2.下列条件中,一定能判断两个等腰三角形相似的是 ( )(A )都含有一个40°的内角; (B )都含有一个50°的内角; (C )都含有一个60°的内角; (D )都含有一个70°的内角.3.如果△ABC ∽△DEF ,A 、B 分别对应D 、E ,且AB ∶DE =1∶2,那么下列等式一定成立的是( ) (A )BC ∶DE =1∶2;(B ) △ABC 的面积∶△DEF 的面积=1∶2;(C )∠A 的度数∶∠D 的度数=1∶2;(D )△ABC 的周长∶△DEF 的周长=1∶2.4.如果2a b =(,a b 均为非零向量),那么下列结论错误的是( )(A )//a b ;(B )20a b -=; (C )12b a =; (D )2a b =. 5.如果二次函数2y ax bx c =++(0a ≠)的图像如图所示,那么下列不等式成立的是( ) (A )0a >; (B )0b <;(C )0ac <;(D )0bc <.6.如图,在△ABC 中,点D 、E 、F 分别在边AB 、AC 、BC 上,且∠AED =∠B ,再将下列四个选项中的一个作为条件,不一定能使得△ADE ∽△BDF 的是( ) (A )EA EDBD BF =; (B )EA EDBF BD =;(C )AD AEBD BF=; (D )BD BABF BC=.二、填空题:(本大题共12题,每题4分,满分48分)(第6题图)7.抛物线23y x =-的顶点坐标是 . 8.化简:112()3()22a b a b --+= . 9.点A (-1,m )和点B (-2,n )都在抛物线2(3)2y x =-+上,则m 与n 的大小关系为m n (填“<”或“>”).10.请写出一个开口向下,且与y 轴的交点坐标为(0,4)的抛物线的表达式 . 11.如图,DE //FG //BC ,AD ∶DF ∶FB =2∶3∶4,如果EG =4,那么AC = .12.如图,在□ABCD 中,AC 、BD 相交于点O ,点E 是OA 的中点,联结BE 并延长交AD 于点F ,如果△AEF 的面积是4,那么△BCE 的面积是 . 13.Rt △ABC 中,∠C =90°,如果AC =9,cos A =13,那么AB = . 14.如果某人滑雪时沿着一斜坡下滑了130米的同时,在铅垂方向上下降了50米,那么该斜坡的坡度是1∶ .15.如图,Rt △ABC 中,∠C =90°,M 是AB 中点,MH ⊥BC ,垂足为点H ,CM 与AH 交于点O ,如果AB =12,那么CO = .16.已知抛物线22y ax ax c =++,那么点P (-3,4)关于该抛物线的对称轴对称的点的坐标是 . 17.在平面直角坐标系中,将点(-b ,-a )称为点(a ,b )的“关联点”(例如点(-2,-1)是点(1,2)的“关联点”).如果一个点和它的“关联点”在同一象限内,那么这一点在第 象限. 18.如图,在△ABC 中,AB =AC ,将△ABC 绕点A 旋转,当点B 与点C 重合时,点C 落在点D 处,如果sin B =23,BC =6,那么BC 的中点M 和CD 的中点N 的距离是 .三、解答题:(本大题共7题,满分78分) 19.(本题满分10分)计算:cos 45tan 45sin 60cot 60cot 452sin 30︒⋅︒-︒⋅︒︒+︒20.(本题满分10分,第(1)、(2)小题各5分) 已知:如图,Rt △ABC 中,∠ACB =90°,sin B =35,点D 、E 分别在边AB 、BC 上,且AD ∶DB =2∶3,DE ⊥BC . (1)求∠DCE 的正切值;(2)如果设AB a =,CD b =,试用a 、b 表示AC .C(第18题图)(第11题图)(第12题图) (第15题图)B21.(本题满分10分)甲、乙两人分别站在相距6米的A 、B 两点练习打羽毛球,已知羽毛球飞行的路线为抛物线的一部分,甲在离地面1米的C 处发出一球,乙在离地面1.5米的D 处成功击球,球飞行过程中的最高点H 与甲的水平距离AE 为4米,现以A 为原点,直线AB 为x 轴,建立平面直角坐标系(如图所示).求羽毛球飞行的路线所在的抛物线的表达式及飞行的最高高度.22.(本题满分10分)如图是某路灯在铅垂面内的示意图,灯柱BC 的高为10米,灯柱BC 与灯杆AB 的夹角为120°.路灯采用锥形灯罩,在地面上的照射区域DE 的长为13.3米,从D 、E 两处测得路灯A 的仰角分别为α和45°,且tan α=6. 求灯杆AB 的长度.23.(本题满分12分,第(1)小题5分,第(2)小题7分)已知:梯形ABCD 中,AD //BC ,AD =AB ,对角线AC 、BD 交于点E ,点F 在边BC 上,且∠BEF =∠BAC .(1)求证:△AED ∽△CFE ;(2)当EF //DC 时,求证:AE =DE .(第20题图)(第21题图)x(第22题图)(第23题图)24.(本题满分12分,第(1)小题3分,第(2)小题5分,第(3)小题4分)在平面直角坐标系xOy 中,抛物线2221y x mx m m =-+--+交 y 轴于点为A ,顶点为D ,对称轴与x 轴交于点H .(1)求顶点D 的坐标(用含m 的代数式表示);(2)当抛物线过点(1,-2),且不经过第一象限时,平移此抛物线到抛物线22y x x =-+的位置,求平移的方向和距离;(3)当抛物线顶点D 在第二象限时,如果∠ADH =∠AHO ,求m 的值.25.(本题满分14分,第(1)、(2)小题各6分,第(3)小题2分)已知:矩形ABCD 中,AB =4,BC =3,点M 、N 分别在边AB 、CD 上,直线MN 交矩形对角线AC 于点E ,将△AME 沿直线MN 翻折,点A 落在点P 处,且点P 在射线CB 上. (1)如图1,当EP ⊥BC 时,求CN 的长; (2)如图2,当EP ⊥AC 时,求AM 的长;(3)请写出线段CP 的长的取值范围,及当CP 的长最大时MN 的长.(第24题图)(备用图) (图1) A B C D NP ME(图2) A B C D N P M E (第25题图)A B C D杨浦区初三数学期末试卷参考答案及评分建议2018.1一、 选择题:(本大题共6题,每题4分,满分24分) 1、A ; 2、C ; 3、D ; 4、B ; 5、C ; 6、C 二、 填空题:(本大题共12题,每题4分,满分48分)7、()0,3-; 8、142a b -rr ; 9、<;10、24y x =-+等; 11、12; 12、36; 13、27; 14、2.4; 15、4; 16、()1,4; 17、二、四; 18、4 三、解答题:(本大题共7题,满分78分) 19.(本题满分10分)解:原式=12231122⋅-⋅+⨯--------------------------------------------------(6分)=1222----------------------------------------------------------------(2分)=14. --------------------------------------------------------------(2分) 20.(本题满分10分,第(1)、(2)小题各5分) 解:(1)∵∠ACB =90°,sin B =35,∴35AC AB =. -------------------------(1分)∴设AC =3a ,AB =5a . 则BC =4a .∵AD :DB =2:3,∴AD =2a ,DB =3a .∵∠ACB =90°即AC ⊥BC ,又DE ⊥BC ,∴AC//DE. ∴DE BD AC AB =, CE ADCB AB=. ∴335DE a a a =, 245CE a a a =. ∴95DE a =,85CE a =.----------(2分) ∵DE ⊥BC ,∴9tan 8DE DCE CE ∠==.-----------------------------(2分)(2)∵AD :DB =2:3,∴AD :AB =2:5. ------------------------------------------------(1分) ∵AB a =,CD b =,∴25AD a =. DC b =-.--------------------(2分)∵AC AD DC =+,∴25AC a b =-.-----------------------------------(2分)21.(本题满分10分) 解:由题意得:C (0,1),D (6,1.5),抛物线的对称轴为直线x =4.----(3分) 设抛物线的表达式为()210y ax bx a =++≠-------------------------------------(1分)则据题意得:421.53661ba ab ⎧-=⎪⎨⎪=++⎩. ----------------------------------------------(2分)解得:12413a b ⎧=-⎪⎪⎨⎪=⎪⎩. -------------------------------------------------------------------(2分)∴羽毛球飞行的路线所在的抛物线的表达式为2111243y x x =-++. ------(1分)∵()2154243y x =--+,∴飞行的最高高度为53米. ------------------------(1分) 22.(本题满分10分)解:由题意得∠ADE =α,∠E =45°.----------------------------------------------(2分)过点A 作AF ⊥CE ,交CE 于点F ,过点B 作BG ⊥AF ,交AF 于点G ,则FG =BC =10. 设AF =x . ∵∠E =45°,∴EF =AF =x . 在Rt △ADF 中,∵tan ∠ADF =AFDF,-----------------(1分) ∴DF =tan tan 6AF x xADF α==∠. --------------------------(1分)∵DE =13.3,∴6x x +=13.3. ---------------------------(1分) ∴x =11.4. ---------------------------------------------(1分)∴AG =AF ﹣GF =11.4﹣10=1.4. ------------------------------------------------------------(1分) ∵∠ABC =120°,∴∠ABG =∠ABC ﹣∠CBG =120°﹣90°=30°.-------------------(1分) ∴AB =2AG =2.8 ----------------------------------------------------------------------- (1分) 答:灯杆AB 的长度为2.8米.------------------------------------------------------------(1分) 23.(本题满分12分,第(1)小题5分,第(2)小题7分) 证明:(1)∵∠BEC =∠BAC+∠ABD ,∠BEC =∠BEF+∠FEC ,又∵∠BEF =∠BAC ,∴∠ABD=∠FEC.------------------------------------ (1分) ∵AD =AB ,∴∠ABD=∠ADB.------------------------------------------------- (1分) ∴∠FEC=∠ADB. -------------------------------------------------------- (1分) ∵AD //BC ,∴∠DAE=∠ECF .--------------------------------------------------- (1分)A B C D F G∴△AED ∽△CFE. --------------------------------------------------------- (1分)(2)∵EF //D C ,∴∠FEC=∠ECD. --------------------------------------------------- (1分) ∵∠ABD=∠FEC ,∴∠ABD=∠ECD.--------------------------------------------- (1分) ∵∠AEB=∠DEC. ∴△AEB ∽△DEC. ----------------------------------------------- (1分) ∴AE BEDE CE=.------------------------------------------------------------------------------(1分) ∵AD //BC ,∴AE DECE BE=.----------------------------------------------------------------(1分) ∴AE AE BE DE DE CE CE BE⋅=⋅.即22AE DE =.-------------------------------------------(1分) ∴ AE =DE . ----------------------------------------------------------------------------- (1分) 24.(本题满分12分,第(1)小题3分,第(2)小题5分,第(3)小题4分) 解:(1)∵22221()1y x mx m m x m m =-+--+=---+.------------------------(1分) ∴顶点D (m , 1-m ).------------------------------------------------------------------(2分) (2)∵抛物线2221y x mx m m =-+--+过点(1,-2),∴22121m m m -=-+--+.即220m m --=. ---------------------------(1分) ∴2m =或1m =-(舍去). ------------------------------------------------------(2分) ∴抛物线的顶点是(2,-1).∵抛物线22y x x =-+的顶点是(1,1),∴向左平移了1个单位,向上平移了2个单位. -------------------------(2分) (3)∵顶点D 在第二象限,∴0m <.情况1,点A 在y 轴的正半轴上,如图(1).作AG ⊥DH 于点G , ∵A (0,21m m --+),D (m ,-m +1),∴H (,0m ),G (2,1m m m --+)∵∠ADH =∠AHO ,∴tan ∠ADH = tan ∠AHO , ∴AG AODG HO=. ∴2211(1)m m m m m m m ---+=----+-.整理得:20m m +=. ∴1m =-或0m =(舍). --------------(2情况2,点A 在y 轴的负半轴上,如图(2).作AG ⊥DH 于点G ,∵A (0,21m m --+),D (m ,-m +1),∴H (,0m ),G (2,1m m m --+)∵∠ADH =∠AHO ,∴tan ∠ADH = tan ∠AHO ,∴AG AODG HO=. ∴2211(1)m m m m m m m -+-=----+-. 整理得:220m m +-=. ∴2m =-或1m =(舍). ---------(2分) ∴1m =-或2m =-.25.(本题满分14分,第(1)、(2)小题各6分,第(3)小题2分)解:(1)∵△AME 沿直线MN 翻折,点A 落在点P 处, ∴△AME ≌△PME . ∴∠AEM =∠PEM ,AE=PE . ∵ABCD 是矩形,∴AB ⊥BC .xx∵EP ⊥BC ,∴AB // EP .∴∠AME =∠PEM . ∴∠AEM =∠AME . ∴AM =AE . ---------------------(2分) ∵ABCD 是矩形,∴AB // DC . ∴AM AECN CE=. ∴CN =CE . ------------------(1分) 设CN = CE =x .∵ABCD 是矩形,AB =4,BC =3,∴AC =5. ∴PE= AE=5- x . ∵EP ⊥BC ,∴4sin 5EP ACB CE =∠=. ∴545x x -=. ---------------------(1分) ∴259x =,即259CN =. ------------------------------------------------------(2分) (2)∵△AME 沿直线MN 翻折,点A 落在点P 处,∴△AME ≌△PME . ∴AE=PE ,AM=PM . ∵EP ⊥AC ,∴4tan 3EP ACB CE =∠=. ∴43AE CE =. ∵AC =5,∴207AE =,157CE =.∴207PE =. ---------------------(2分)∵EP ⊥AC ,∴257PC ===. ∴254377PB PC BC =-=-=. --------------------------------------(2分) 在Rt △PMB 中,∵222PM PB MB =+,AM=PM . ∴2224()(4)7AM AM =+-. ∴10049AM =. --------------------------------------(2分)(3)05CP ≤≤,当CP 最大时MN .--------------------------------------------------(2分)。

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杨浦区2016学年第一学期期末期末质量调研初三英语练习卷2017.1(满分150分,考试时间100分钟)(本卷有七大题,共94小题。

试题均采用连续编号。

所有答案务必按照规定在答题纸上完成,做在试卷上不给分。

)Part 1 Listening (第一部分听力)I. Listening Comprehension (听力理解)(共30分)A. Listen and choose the right picture (根据你所听到的内容,选出相应的图片)(6分)1._______2. _______3._______4. _______5. _______6._______B. Listen to the dialogue and choose the best answer to the question you hear (根据你所听到的对话和问题,选择最恰当的答案)(8分)7.8. A) Shy. B) Pretty. C) Serious. D) Active.8. A) A teacher. B) A TV host. C) A bank clerk D) A writer.9. A) 2:00. B) 2:15. C) 2:30. D) 2:45.10. A) By check. B) By cash. C) By credit card. D) By Apple Pay.11. A) A TV guide. B) A part-time job. C) A plan formovies D)A choices of courses12. A) The shoes are too heavy.C) She doesn’t like the shoes.B) Cookies.B) The ground is wet.D) It is raining outside.13. A) Some Chinese were hit by local people.C) Some tourists were killed in a flash flood.B) An earthquake occurred there last night.D) Some tourists were injured in a car accident.14. A) A good website helped Alina get some customers.B) Alina helps people by donating clothes and furniture.C) Alina borrowed money from the bank to start her business.D) Alina’s business is to give people advice on creati ng website.C. Listen to the passage and (ell whether the following statements are true or false (判断下列句子是否符合你听到的短文内容,符合的用“T”表示,不符合的用“F”表示)(6分)15.Barry Haddow travels from Wales to London every day.16. The “Commuter of the Year” competition was organiz ed by an early morning TV program.17. Mr. Haddow won because his commute takes the longest time.18. He travels most of the way by train, and then by taxi.19. He doesn’t like wales, but it’s not as expensive as London.20. He won a rail holiday for himself and his family.D. Listen to the passage and fill in the blanks (听短文填空,完成下列句子。

每空格限填—词)(10 分)21. William Baldock is a hero after helping his mother when she _________ __________.22. He rang for an ambulance, telephoned his father ___________ ___________, and then his grandmother.23. While waiting for people to come, William ___________ ____________ his 18-mongth-old sister.24. Steve Lyn was amazed that William knew the __________ __________ to dial.25. Mrs Baldock was very __________ __________ both William and the ambulance service,Part 2 Phonetics, Grammar and Vocabulary(第二部分语音、语法和词汇)II. Choose the best answer(选择最恰当的答案):(共20分)26. A much bigger battle is ahead for the president. Which of the following is the correct pronunciation for the underline part?A. /e/B. / /C. /a:/D. /ei/27. A new survey shows that most travelers are not satisfied _________________ airport wifi.A. ofB. forC. aboutD. with28. the red cross said that many of _______________ wounded were not receiving needed care.A. aB. anC. theD. /29. Henry Ford founded his car company ___________________ the beginning of the 20th century.A. inB. byC. forD. at30. Sightseeing in the town is best done ___________ by tour bus or by bike.A. eitherB. neitherC. bothD. allBDCDA31. People had very _____________ amusements to choose from. There was no radio, or television.A. fewB. a fewC. littleD. a little32. Old people may feel _______________ if they live alone for a long time.A. gentlyB. safelyC. quietlyD. lonely33. The more carefully you dive, the ___________ you will be.A. safeB. saferC. safestD. the safest34. The soldiers waited until evening so that they _____________ attack the enemy under cover of darkness.A. couldB. mightC. mustD. should35. Housing is very expensive in this city. The prices ______________ up again since last month.A. goB. are goingC. have goneD. will goADBAC36. I’m not sure yet _________ I think I will study medicine in the future.A. butB. orC. forD. so37. His paintings were not highly valued _______ he died in 1936.A. ifB. althoughC. untilD. since38. The weather expert predicted that the coming typhoon _________ destructive.A. isB. will beC. have beenD. would be39. I n eed to amuse myself so I won’t keep ________ about things.A. thinkB. to thinkC. thinkingD. to thinking40. Only 3 per cent of the world’s water is fresh water. The rest _______ salt water.A. beB. amC.isD. AreACDCC41.Most colleges will allow students _______ their major choices.A. changeB.to changeC. changingD. to changing42. If you live in Beijing or Shanghai, you can try out the Mobike app just to see how many bikes______ around you.A. are parkingB. are parkedC. will parkD. will be parked43. ________ the coat in water! Have it dry cleaned.A. N ot washB. Don’t washC. Not washingD. Not to wash44.---- Someone broke into my neighbour’s apartment yesterday.----- _________ Were they at home?A. How terrible!B. Be careful.C. Not at present.D. Well, not too bad.45. ---What about setting up a Help Kids Group to raise money?-- _______ Then we will have money to help kids in need.A. That’s OK.B. That sounds great.C. I don’t think so.D. Sure. I’d love to.BBBABplete the following passage with the words or phrases in the box. Each word orCan you __46____the world without money? It is quite impossible. Money-they say—makes the world go round. Why is that so? Well, think of all the__47____in which you have to pay for the things you buy—like food,clothes, medicine, newspapers or for the services you get, like a new hair style or car repairs. Think of the entertainment you you have to pay for-tickets to__48____,sports matches,favorite books, CDs and holidays. You can have it all if you’ve got the money.Money has played an important role in every civilization. It has taken _49____ forms and haschanged many times over the centuries.The first form of payment was the exchange of goods. People usually exchanged animal skins and meat, fruit and vegetables, cloth and ____50____stones. In ancient Egypt they used metal bars which were cut into smaller parts if necessary. In the seventh century BC the first coins appeared. They were usually made of silver or gold and their value ____51____ the amount of metal in each coin. With time, coins became very popular and many countries_____52____ their own system of money.Today, people pay for things in different ways they pay in cash, by check or by credit card. The last one, it seems, is the most convenient form of payment. Many people believe that one day money in the form of coins, banknotes, checks and cards will ____53_____ disappear and that all buying and selling will be done through the Internet.46-49 DEAC 50-53 CEABIV. Complete the sentences with the given words in their proper forms(用括号所给单词的适当形式完成下列句子,每空格限填一词):(共8分)54. The health project teaches children how to brush their properly. (tooth)55. Rory made all the furniture . He’s very good with his hands. (he)56. I had to stay one more day in Capital Airport by the haze(雾霾)in years. (bad)57. I always ask my grandfather for advice. He is a very man. (wisdom)58. In each child wears a uniform to school –everybody is dressed in the same way. (British)59. John has taken up judo only but he is quite good at it. (recent)60. The extra money will him to travel to Canada and the States. (able)61. It was asking my brother for money –he didn’t have any. (use)答案与解析:54. Teeth. 55. himself.56. worst. 57. wise. 58. Britain.59. recently. 60. enable.61. useless.V. Rewrite the following sentences as required(根据所给要求,改写下列句子。

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