武汉外校2015~2016学年度下学期初中三年级适应性训练(三)参考答案

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2017—2018学年度上学期武汉外国语学校校初中三年级适应性训练(二)

2017—2018学年度上学期武汉外国语学校校初中三年级适应性训练(二)

2017—2018学年度上学期武汉外国语学校校初中三年级适应性训练(二)化学试卷可能用到的相对原子质量:H—1 C—12 O—16 Ca—40一、选择题1.下列事例中,发生化学化的是()A.石蜡熔化B.酒精挥发C.纸张燃烧D.干冰升华2.下列说法错误的是()A.金刚石、石墨的物理性质不同是因为碳原子排列方式不同B.碳原子是保持碳单质的性质的最小粒子C.活性炭具有吸附性是因为有疏松多孔的结构D.只含有一种元素的物质不一定是单质3.下列实验过程中不会发生颜色变化的是()A.木炭粉与氧化铜共热B.将烘烤过的木炭放入盛有红棕色二氧化氮气体的集气瓶中C.将二氧化碳通入水中D.铜片在空气中加热4.金属铝既能与酸反应,也能与碱发生反应。

铝与NaOH溶液反应的化学方程式如下:2Al+2NaOH+□X==2NaAlO2+3H2↑关于物质X,下列说法正确的是()A.该物质不属于氧化物B.该物质由碳、氢、氧三种元素组成C.该物质的化学式为H2O2D.该物质中氢、氧元素的质量比为1∶85.实验室用过氧化氢溶液和二氧化锰制取氧气并回收二氧化锰,部分操作如下图所示。

其中正确的是()A.制取B.收集C.验满D.回收MnO26.除去二氧化碳里混有的一氧化碳气体,可行的方法是()A.点燃该混合气体C.使混合气体通过盛有水的洗气瓶B.使混合气体通过盛有澄清石灰水的洗气瓶D.使混合气体通过灼热的氧化铜7.6.4g某物质R完全燃烧生成8.8gCO2,化学反应方程式是:2R+3O2 点燃2CO2+4H2O则由此得出的下列结论完全正确的一组是()∶R由碳、氢两种元素组成;∶R中碳、氢、氧三种元素的原子个数比为1:4:1;∶6.4gR燃烧还生成了7.2gH2O;∶R的相对分子质量等于64.A.∶∶ B.∶∶ C.∶∶ D.∶∶8.某同学用如右图所示装置验证二氧化碳与水的反应。

已知,氮气的密度比空气小;该装置气密性良好,锥形瓶中放入的是用石蕊溶液染成的紫色干燥纸花。

武汉外校初升高资格生考试有答案

武汉外校初升高资格生考试有答案

2015武汉外国语学校初升高资格考试III 英语(总分60分)第一部分第一部分 单项选择(共15小题,每小题1分,满分15分)分)1. ---_________! The door of the classroom has been left open all night.---Oh, I'm not the one to blame. A. Thank goodness B. Come on C. All right D. My goodness 2. ---Can you show me ________way to the Jordan's ?---Sorry, I'm afraid I can't because there isn't______ Jordan in the community. A. the; the B. the; a C. a; the D. the; / 3. ---Ten dollars a pair? I think it's a bit expensive.---If you take five pairs, the price for each will ____ to five dollars. A. take down B. put down C. break down D. come down 4. ---It is many years _____ they ____married.---As I know, they just celebrated their 30th wedding anniversary last month. A. before; had got B. when; got C. since; gotD. that; had got 5. ---The advertisement says this big store provides all kinds of refrigerators.---I think it wants to tell us we_____ go to any other store. A. needn't B. can't C. mustn'tD. may not 6. _________all of them have done a good job, only one can be chosen for the position. A. If B. As C. WhileD. Since 7. Attention please ! All passengers must have the luggage _____two hours before your planes take off. A. to check B. checked C. checkD. checking 8. We have ___the TV sets and marked on each box "Look out", "Easily broken stuff". A. packed B. taken C. carriedD. delivered 9. Teenagers who don't take exercise or ______diet is high in fat will be likely to gain weight. A. that B. which C. whatD. whose 10. After thinking it over, he finally agreed with my suggestion that we _____ the date. A. changed B. had changed C change D. would change 11. ---Do you know that she failed Physics in the final-term exam?---Yes, but I have no idea _____ she did it. She is always good at it. A. how B. why C. thatD. what 12. Lucy, _____for years to be a reporter, finally took a position at Wuhan Evening Daily. A. having struggled B. to struggle C. strugglingD. struggled 13. It is known to all that it is Jim who broke the chair. Don't talk to me as if I ___it.A. have doneB. didC. had doneD. would do 14. Only after they had negotiated for several months _____an agreement. A. they reached B. did they reach C. they reachD. do they reach 15. ---I tried my best but I still couldn't work out the meaning of the poem.---____________. Read more. A. I'm afraid not B. It's up to you C. I'm sorry D. You are not alone第二部分第二部分 完形填空(共15小题,每小题1分,满分15分)分)I lived with my father on a small farm in Virginia. Farm days were happy but there were sometimes some things you didn’t expect. One day, I was sent by my father to buy some tools for our farm. As a 17-year-old boy, I liked 16 better than driving our truck, 17 this time I couldn’t cheer up. My father had told me I’d have to ask for credit(赊账) at the store.Seventeen is a/an 18 age, when a young man wants respect more than anything else. It was 1976, and the ugly 19 of racial discrimination(歧视) was still a fact of life. I had seen my friends ask for credit and then stand, head down, while the store owner 20 whether they were good for it. I knew black youths just like me who were 21 like thieves by the store clerk each time they went into a store.My family was honest. We paid our debts. But before harvest, cash was short. Would the store owner 22 us?Wall James, the store owner, stood behind the cash desk, talking to a farmer. I nodded as I passed him on my way to the shelves. When I brought my 23 to the cash desk, I said 24 , “I need to put this on credit.”The farmer gave me a 25 The farmer gave me a 25 look. But Wall’s face didn’t change. “Sure,” he said quickly. “Your dad is look. But Wall’s face didn’t change. “Sure,” he said quickly. “Your dad is 26 26 good for it.” He good for it.” He good for it.” He 27 27 27 to the other man. “This boy is one of John Tuck’s sons.”to the other man. “This boy is one of John Tuck’s sons.”The farmer nodded in a neighborly way. I was filled with pride. “John Tuck’s son.” Those there words had opened a door to an adult’s respect and trust.That day I discovered that the good name my parents had 28 brought our whole family the respect of our neighbors. Everyone knew what to 29 from a Tuck: a decent person who kept his word and respected himself 30 much to do wrong.16. A. everything B. anything C. nothing D. something 17. A. so B. yet C. and D. though 18. A. pridefulB. excitingC. respectfulD. excellent 19. A. object B. habit C. intention D. shadow 20. A. suspected B. questioned C. found D. figured 21. A. caught B. accused C. watched D. separated 22. A. trust B. blame C. charge D. believe 23. A. bargains B. orders C. sales D. purchases 24. A. excitedly B. friendly C. carefully D. casually 25. A. trustful B. distrustful C. proud D. confident 26. A. always B. sometimes C. never D. frequently 27. A. replied B. turned C. pointed D. introduced 28. A. givenB. deservedC. earnedD. wasted29. A. give B. receive C. demand D. expect 30. A. so B. enough C. too D. very三.阅读理解(共10小题,每小题2分,满分20分) 第一节,(共5小题,每小题2分,满分10分)Humor can make the conversation more interesting. If you intend using humor in your talk to make people smile, you must know how to identify shared experiences and problems. Your humor must be relevant to the audience and should help to show them that you are one of them or that you understand their situation and are in sympathy with their point of view. Depending on whom you are addressing, the problems will be different. If you are talking to a group of managers, you may refer to the disorganized methods of their secretaries; if you are addressing secretaries, you may want to comment on their disorganized bosses.Here is an example, which I heard at a nurses' gathering, of a story which works well because the audience all shared the same view of doctors. A man arrives in heaven and is being shown around by an Angel. He sees wonderful accommodations, beautiful gardens, sunny weather and so on. Everyone is very peaceful, polite and friendly until, waiting in a line for lunch, the new arrival is suddenly pushed aside by a man in a white coat, who rushes to the head of the line, grabs his food and stomps over to a table by himself. "Who is that?" the new arrival asked the Angel. "Oh, that's God." came the reply, "but sometimes he thinks he's a doctor."If you feel awkward being humorous, you must practice so that it becomes more natural. Include a few casual and apparently off-the-cuff remarks which you can deliver in a relaxed and unforced manner. Often it's the delivery which causes the audience to smile, so speak slowly and remember that a raised eyebrow or an unbelieving look may help to show that you are making a light-hearted remark.Look for the humor. It often comes from the unexpected. A twist on a familiar quote "If at first you don't succeed, give up" or a play on words or on a situation. Look at your talk and pick out a few words or sentences which you can turn about and inject with humor. 31:To make your humor work, you are supposed to ________.A. make fun of the disorganized people.B. address different problems to different people.C. show sympathy for your listeners.D. take advantage of different kinds of audience32: The joke about the doctors implies that, in the eyes of nurses, they are ________. A. very clear about their godlike roleB. very busy even during lunch hours.C. impolite to new arrivalsD. not fond of having lunch with the nurses33:What ’s the possible meaning of the underlined word in paragraph3? ________.A. intentionalB. urgentC. unpreparedD. excellent 34:To achieve the desired result, humorous stories should be delivered ________.A. as casually as possibleB. as awkwardly as possibleC. in well-worded languageD. as quickly as possible35: The best title for the text may be ________.A. Different Humor methodsB. Various kinds of humorC. Add humor to speechD. Use humor effectively第二节第二节 (共5小题,每小题2分,满分10分)分) 根据短文内容,从短文后的选项中选出能填入空白处的最佳选项,选项中有两处为多余选项。

武汉实验外国语学校2014~2015学年度九年级数学适应性训练(三)(word版)

武汉实验外国语学校2014~2015学年度九年级数学适应性训练(三)(word版)

武汉实验外国语学校2014~2015学年度九年级适应性训练(三)一、选择题(本大题共10小题,每小题3分,共30分) 1.函数312-+-=x x y 中自变量的取值范围是( ) A .x ≤2且x ≠3 B .x ≤2 C .x <2且x ≠3 D .x =3 2.已知关于x 的一元二次方程(x ﹢1)2-m =0有两个实数根,则m 的取值范围是( ) A .m ≥﹣1B .m ≥0C .m ≥1D .m ≥23.下面图形中,既是轴对称图形又是中心对称图形的是( )4.在正方形网格中,△ABC 的位置如图所示,则sinB 的值是( ) A .22 B .23 C .33 D .35.如图,⊙O 的直径AB =12,CD 是⊙O 的弦,CD ⊥AB ,垂足为,且BP ∶AP =1∶5,则CD的长为( ) A .52B .54C .24D .286.已知圆锥的底面半径为3 cm ,母线长为5 cm ,则此圆锥的侧面积为( ) A .15π cm 2B .20π cm 2C .25π cm 2D .30π cm 27.如图,在Rt △ABC 中,∠C =90°,P 是斜边上一定点,过点P 作直线与一直角边交于点Q ,使图中出现两个相似三角形,这样的点Q 有( ) A .1个B .2个C .3个D .4个8.数学老师对小明参加中考前的5次模拟考试进行统计分析,判断小明的数学成绩是否稳定,老师需要知道小明这5次数学成绩的( ) A .平均数B .众数C .方差D .中位数9.在平面直角坐标系中,函数y =x 2-2x (x ≥0)的图象为C 1,C 1关于原点对称的图象为C 2,则直线y =a (为常数)与C 1、C 2的交点共有( )A .1个B .1个或2个C .1个或2个或3个D .1个或2个或3个或4个 10.如图,等边三角形△ABC 的边长为2,射线AM 平行BC ,P 是射线AM 上一动点(P 不与A 点重合),△APC 的外接圆交BP 于Q ,则AQ 长的最小值为( ) A .1 B .3C .33D .332二、填空题(共6小题,每小题3分,共18分)11.计算:tan 45°=_________;-(-2a 2b 3)4=_________;2)5(-=_________12.一个质地均匀的小正方体,六个面分别标有数字“1”,“1”,“2”,“4”,“5”,“5”,掷骰子后,朝上一面的数字是奇数的概率是_________13.如图,AB 是⊙O 的直径,弦CD ⊥AB ,∠D =30°,CD =6,则图中阴影部分的面积为____14.如图,直线y =-31x +1与坐标轴交于A 、B 两点,矩形ABCD 对称中心为O ,双曲线xky =(x >0)正好经过C ,O 两个点,则k =_________15.在平面直角坐标系xoy 中,直线x =2和抛物线y =ax 2在第一象限交于点A ,过点A 作AB ⊥x 轴于点,如果取1、2、3、……、n 时对应的△AOB 的面积为S 1、S 2、S 3……、S n ,那么S 1+S 2+S 3+……+S n =_________16.如图,正方形ABCD 的边长为4,点P 为边AD 上一动点(不与A 、D 重合),将正方形ABCD 折叠,使点B 落在P 处,C 落在Q 处,PQ 交CD 于点G ,折痕为EF ,连接BP 、BG ,则△PBG 的面积的最小值为_________ 二、填空题(共9小题,共72分) 17.(本题满分6分)解方程:x 2+3x =118.(本题满分6分)如图,四边形ABCD 是矩形,E 是上一点,过C 作CF ⊥DE ,垂足为F ,证明:ADCF DE CD =19.(本题满分6分)图中是抛物线形拱桥,当水面宽AB =8时,拱顶到水面的距离CD =4米,如果水面上升米,那么水面宽度为多少米?20.(本题满分6分)甲乙两人在玩转盘游戏时,把转盘分别分成4等份、3等份,并在每一份内标上数字,如图所示,游戏规定:转动两个转盘停止后,指针必须指到某一个数字,否则重转(1) 请用树状图或列表法列出所有可能的结果(2) 当指针所指的两个数字都是方程x2-4x+3=0的解时,则甲获胜;若指针所指的两个数字都不是方程x2-4x+3=0的解时,则乙获胜,问他们两人谁获胜的概率大?请分析说明21.(本题满分7分)在平面直角坐标系中,已知△ABC三个顶点的坐标分别为A(-1,2)、B(-3,4)、C(-2,9)(1) 画出△ABC(2) 画出△ABC绕点A顺时针旋转90°后得到的△AB1C1(3) 直接写出△ABC在上述旋转过程中扫过的面积22.(本题满分8分)△ABG中,∠ABG=90°,以AB为直径作⊙O交于点,弧BD=弧CD,过点D作AC的垂线,垂足为E,ED的延长线BG交于E(1) 求证:BF=DF(2) 若tanG=2,AC=2,求⊙O的半径23.(本题满分10分)某公司生产A种产品,它的成本是2元/件,售价是3元/件,年销售量为10万件.为了获得更好的效益,公司准备拿出一定的资金做广告.根据经验,每年投入的广告费是x万元,产品的年销售量将是原销售量的y倍,且y是x的二次函数,它们的关系如下表:x(万元)0 1 2 ……y 1 1.5 1.8 ……(1) 求y与x的函数关系式(2) 如果把利润看作是销售总额减去成本费用和广告费用,试求出年利润S(万元)与广告费用x(万元)的函数关系式(3) 如果公司年投入的广告费为1~3万元,问广告费在什么范围内,公司获得的年利润随广告费的增大而增大?24.(本题满分10分)已知:△ABC 为等腰直角三角形,∠A =90°,AB =AC =6.点D 在边AC 上以每秒1个单位长度的速度从A 向C 点运动,同时点F 在边BC 上以某一速度从向点运动,过C 点作CE ⊥BD 于E ,设点D 的运动时间为t 秒 (1) 如图1,当t =3时,则CE =_________ (2) 如图2,当t =58时,此时FD ⊥BD ,求F 点的运动速度 (3) 如图3,在某一时刻,D 、F 点刚好运动到DF ⊥BC ,连接AE 、EF ,分别交BD 、AC 于M 、N 两点,求证:tan ∠DNC =BMDN CNDM ∙∙25.(本题满分12分)已知一次函数y 1=2x ,抛物线y 2=mx 2-3(m -1)x +2m -1的顶点A 在y 轴上(1) 求抛物线y 2解析式(2) 将y 2作平移使其顶点为E (1,-4)得y 3,y 3交y 轴于B 、D (D 在右侧),交y 轴于点C ,点P 是y 3在x 轴下方的抛物线上一动点.设△PCD 的面积为S ,若S 为整数,则这样的△PCD 共有多少个,为什么?(3) 是否存在抛物线y 4=ax 2+bx +c ,使其经过点(-5,2),且对于任意一个实数x ,这三个函数所对应的函数值y 1、y 2、y 4,都有y 1≤y 2≤y 4成立?若存在,求出抛物线y 4的解析式;若不存在,请说明理由。

2016—2017学年度下学期武汉外国语学校初中三年级适应性训练(四)语文

2016—2017学年度下学期武汉外国语学校初中三年级适应性训练(四)语文

2016—2017学年度下学期武汉外国语学校初中三年级适应性训练(四)语文试卷本卷满分:120分考试时间:120分钟一.(共12分,每小题3分)1.下列各组词语中加点字的书写或注音有误..的一组是(B)A.魁梧.(wú)张皇.重峦叠嶂.(zhàng)眼花缭.乱B.荒谬.(miù)浮躁.汗流浃.背(jiá)不可明.状C.慰藉.(jiè)黏.膜潜.滋暗长(qián)悲天悯.人D.猝.然(cù)繁琐.稍纵即.逝(jí)万贯.家私2.依次填入下面横线处的词语,恰当..的一项是(B)书是整个人类的记忆。

没有书,也许历史还在混沌未开的蒙昧中_____。

读书,让绵延的时光穿越我们的身体,让几千年来_____的智慧在我们每一个人的血液里汩汩流淌。

读书,不仅需要_____的精神,还需要懂得快慢精粗之分。

A徘徊积聚披星戴月B徘徊积淀废寝忘食C踟蹰积淀披星戴月D踟蹰积聚废寝忘食3.下列各句,有语病...的一项是(C)A.《经济时报》称,中国经济今后一段时间还将保持高速增长的势头不会减弱,中国仍将是全球投资者向往的地方。

B.齐为民此前曾导演、监制很多高质量的儿童电影,《派饭》《老海的新生活》等多部优秀儿童电影都是出自他之手。

C.通过在汉口商业博物馆的珍贵文物、文献、老照片的展出,全面展现了从殷商以来汉口商业发展的千年历程。

D.“就业创业实训”是针对女大学生踏入社会、融入社会的实训,实训导师全部是实战经验丰富的女企业家。

4.下列各句标点符号使用不规范...的一项是(C)A.“今天爸爸不扶你,自己上。

”我说。

儿子看着我,远远的眼睛里闪烁着兴奋,随即开始了艰难的攀登。

B.省环保厅介绍,空气质量较好的前3位城市依次是神农架、恩施、天门,相对较差的后三位依次是荆州、鄂州、武汉。

C.四海一家亲,共祭楚隐贤,昨天,蔡甸区在钟子期墓前举行丁酉年华人华侨“同结知音缘”大型祭祀活动,纪念伯牙子期。

2015-2016第二学期复习题之三全解

2015-2016第二学期复习题之三全解

复习题之三一、填空题1.下列过程,填上大于,小于还是等于或无法判断:(环境工程)(1) 非理想气体卡诺循环: W+Q____0,W ____0,∆S ____0(2) 在一个绝热恒容的系统中发生了爆反应,使系统的温度和压力皆显著升高,则反应前后ΔH__________0;ΔS_______0;ΔA__________02. 指出下列公式的适用范围:(1) pdVTdS dU -=_________________________________________________________(2)___________________________________________________3. G 判据:ΔG ≤0的适用条件_________________________________________4. 某反应半衰期与起始浓度无关,该反应为 级反应5. 对电池反应Zn(s)+2Cl -(α1)→ Zn 2+(α2)+ Cl 2 (100kpa),所设计的原电池用符号表示为 ________________________________________________________________________6. 在温度为T 时反应C(s)+O 2 (g) = CO 2(g)、C(s)+(1/2)O 2 (g) = CO(g)的平衡常数分别为K θ1、K θ2,则反应CO(g)+(1/2)O 2 (g) = CO 2(g)的平衡常数为_____________________。

7. 糖可以顺利溶解在水中,说明固体糖的化学势较糖水中的糖的化学势__________。

8. 在讨论固体对气体等温吸附的兰格谬尔理论中,最重要的基本假设为:吸附是 __层的。

9. 阿伦尼乌斯方程为______________。

10.热力学系统可以分为三类:____________;____________;____________。

2015武汉外校数学模拟试卷3第三套(C套卷)

2015武汉外校数学模拟试卷3第三套(C套卷)

第三套(C 套)一、填空题(第1~2题,每题2分,第3~8题,每题3分,共22分)1.(1)如果1:★=54:3,那么★=__________。

(2)若507×(□÷41+0.5)=0.1,则□=_________。

2.下列说法:①街道上一边原有电线杆29根,每相邻两根间的距离是45米,由于改建,要把每两根电线杆间的距离改成60米,可以有9根不需移动;②小林买文具,店主给予了八折优惠,结果便宜了1.6元,则文具的标价是10元;③商店出售的鞋子规格大小有两种表示方法:“厘米”或“码”。

一般鞋子上标的号为厘米数,如“2221”表示22.5厘米,口语称其为“35码”。

小明穿34码的鞋子,则鞋子上的标号为22;④C 市汽车牌号有一类编号是“CA ”后面排上5个阿拉伯数字,即“CA ·□□□□□”,如果编号中出现相邻的数字“68”就称为幸运车牌号,那么这类车牌号中从10000到99999的“幸运车牌号”共有3700个,其中正确的是___________________。

(填序号)3.小明同学做题,每小时做5题,可以在预定时间完成,当他做完10题后,解题效率提高60%,不但提前3小时完成,而且还多做了6题。

原计划做________题。

4.业余时间乐乐喜欢玩卡片。

有10张卡片,他们的背面完全相同,正面写有1~10的十个数字,从这十张卡片中任意抽一张,抽到质数的可能性是___________。

5.三位同学去种树,第一位同学种的树是其他同学种树总数的一半,第二位同学种的树比其他同学的种树总数少32,第三位同学种的树是15棵,三位同学共种树________棵。

6.如图,把一个高3分米的圆柱体底面平均分成若干个扇形,然后把圆柱体切开,拼成一个与它等底等高的近似长方体,长方体的表面积比圆柱体的表面积增加60平方厘米,原来圆柱体的体积大约是______(π取3)。

某校初中一年级(1)班和(2)班共85人去游公园,经估算,如果两班都以班为单位分别购票,比两班联合购票多花120元,其中(1)班人数比(2)班多。

武汉外国语学校2017-2018学年度下学期初中三年级适应性训练(三)语文试题

武汉外国语学校2017-2018学年度下学期初中三年级适应性训练(三)语文试题

2017--2018学年度下学期武汉外国语学校初中三年级适应性训练(三)语文试卷本卷满分:120分考试时间:150分钟第I卷(选择题共30分)一、(共12分,每小题3分)1.下列各组词语中加点字的书写或注音有误的一组是( )A.运筹.繁琐.(suǒ) 狡黠.(xiá) 手不释.卷B.陶冶.慰藉.(jiè) 冗.杂(rǒng) 挖心搜.胆C.浩瀚.丘壑(hè) 蓦.然(mù) 精血成.聚D.揣摩.亢.奋(kàng) 晦.暗(huì) 重峦.叠嶂2.依次填入下面横线处的词语,恰当..的一组是( )关公崇拜起源于荆楚,也寄寓着荆楚人民对关羽的特殊感情。

关公是“义”的化身,在他身上,我们看到了守土报国的,也看到了治军安民的;看到了扶危济困的,也看到了同生共死的。

A.忠义仁义侯义情义B.侠义仁义忠义情义C.忠义仁义情义侠义D.侠义情义仁义忠义3.下列各项中,有语病的一项是( )A.《经典咏流传》不是“为赋新词强说愁”,而是带着一种文化的修复感和使命感而来,为传承找到了一条宽广而新颖的途径。

B.中国高铁迅速发展,不仅带动了中国社会经济的发展,也让中国老百姓在日常生活中实实在在地获得了享有世界领先的幸福感。

C.针对春季传染病频发的客观实际,湖北省药监局、教育厅联合召开全省学校食品安全电视电话会议,部署学校食堂食品安全专项检查工作。

D.《红海行动》通过表现国力强盛和大国威严激发了人们的爱国情怀,看来能否点燃人们的爱国热情取决于电影的质量。

4.下列各句标点符号使用不规范的一项是( )A.苏轼的《水调歌头》纵览古今变迁,横贯天地流转,是一篇久负盛名的浪漫主义杰作。

宋人曾称赞:“中秋词,自东坡《水调歌头》一出,余词尽废。

”B.随着“一带一路”建设的推进,各种特色美食更加丰富多样。

土耳其的无花果干、越南的咖啡都进了中国消费者的购物车:沿线国家的美食料理,出现在了我们的日常菜单上。

2015-2016年武汉市九年级调考英语试卷及答案

2015-2016年武汉市九年级调考英语试卷及答案

2014-2015学年武汉市部分学校九年级调研测试英语试卷第一卷(选择题共85分)第一部分听力部分(共三节)第一节(共4小题,每小题1分,满分4分)听下面4个问题。

每个问题后有三个答语,从题中所给的A、B、C、D三个选项中选出最佳选项。

听完每个问题后,你都有5秒钟的时间作答和阅读下一小题。

每个问题仅读一遍。

1.A. It‟s Tom. B. Jack‟s. C. A nice one2.A. A black cat. B. Very warm. C. It‟s lovely.3.A. Twice a week. B. About one week C. In a week4.A. It‟s sweet. B. Too small. C. The bigger one.第二节(共8题,每小题1分,满分8分)听下面8段对话,每段对话后有一个小题,从题中所给的A、B、C三个选项中选出最佳选项。

听完每段对话后,你都有10秒钟的时间来回答有关小题和阅读下一小题。

每段对话仅读一遍。

5.How is the woman?A. Not goodB. OKC. Tired6.What can we know about Kate‟s sister?A. She‟s noisyB. She doesn‟t talk muchC. She isn‟t friendly.7.What does the man mean?A. He doesn‟t want to stay outsideB. He is not happy about more workC. He always gets bad news.8.Why is the dog considered as a cat?A. The other dogs are afraid of it.B. It likes eating cat food.C. It just stays with cats.9.When is the exam going to be?A. On Tuesday.B. On ThursdayC. Nextweek.10.How does the man go to work?A. By Bus.B. By bikeC. By subway11. Why doesn‟t the man go anywhere with his friends?A. He has too much work to do.B. His friends have no money.C. Everything is expensive for him.12.What is Joan‟s phone number?A. It‟s 85658976.B. It‟s 85658977.C. It‟s 85658877.第三节(共13小题,每小题1分,满分13分)听下面4段对话或独白,每段对话或独白前有几个小题,从题中所给的A、B、C三个选项中选出最佳选项。

初三适应性练习题答案

初三适应性练习题答案

初三适应性练习题答案一、选择题1. 根据题目分析,正确答案是A。

因为根据题目所给的选项,只有A选项符合题目要求。

2. 正确答案是B。

根据题目中的信息,我们可以得出B选项是正确的。

3. 正确答案是C。

根据题目的描述,C选项是最佳选择。

4. 正确答案是D。

通过分析题目,我们可以确定D选项是正确的答案。

二、填空题1. 根据题目所给的语境,第一个空应填入“achieve”,表示“实现”。

2. 第二个空应填入“improve”,表示“提高”。

3. 第三个空应填入“opportunity”,表示“机会”。

三、阅读理解1. 根据文章第一段,我们可以得出第一个问题的答案:The author's main purpose is to introduce the new school year.2. 第二个问题的答案可以从文章的第二段找到:The school offersa variety of activities to help students adapt to the new environment.3. 第三个问题的答案在文章的最后一段:Students are encouragedto participate in extracurricular activities to enrich their school life.四、完形填空1. 根据上下文,第一个空应填入“although”,表示“尽管”。

2. 第二个空应填入“support”,表示“支持”。

3. 第三个空应填入“challenge”,表示“挑战”。

五、作文题目:我的初三生活要求:1. 描述你的初三生活;2. 表达你对初三生活的感想;3. 100字左右。

我的初三生活是忙碌而充实的。

每天,我都要面对大量的学习任务和考试。

尽管压力很大,但我享受这种挑战。

我相信通过努力,我能够实现我的目标。

初三是人生中重要的一年,我将珍惜这段时光,不断进步。

2016武汉元调英语试题

2016武汉元调英语试题

秘密★2015年1月22日2015-2016学年度武汉市部分学校初三年级调研测试第I卷(选择题,共85分)第一部分听力部分一、听力测试(共三节)第一节(共5小题,每小题1分,满分5分)听下面5个问题。

每个问题后有三个答语,从题中所给的A、B、C三个选项中选出最佳选项。

听完每个问题后,你都有5秒钟的时间来作答和阅读下一小题。

每个问题仅读一遍。

1. A. Twenty. B. Pretty. C. My sister.2. A. Yellow, I think. B. It’s small. C. A basketball.3. A. In the classroom. B. At two thirty. C. For about one hour.4. A. It’s beautiful. B. The bigger one. C. In the sky.5. A. Tomorrow morning. B. With his parents. C. To Boston.第二节(共7小题,每小题1分,满分7分)听下面7段对话。

每段对话后有一个小题,从题中所给的A、B、C三个选项中选出最佳选项。

听完每段对话后,你都有10秒钟的时间来回答有关小题和阅读下一小题。

每段对话仅读一遍。

6. What is the woman doing?A. Asking for today’s paper.B. Looking for Jack.C. Cleaning Jack’s room.7. How does the woman like the weather?A. She really likes the weather.B. She hates the weather.C. The weather is OK to her now.8. What language is spoken in the film?A. English.B. Chinese.C. French.9. What are the two people talking about?A. Carl.B. Bill.C. Carl’s house.10. What does the man mean?A. There is no library nearby.B. There is only a church here.C. The library is near the church.11. What do we know about Sandy?A. He is seldom late for schoolB. He didn’t go to school this morning.C. He often goes to school late.12. When does the conversation most likely take place?A. When the guest is coming into the room.B. When the guest is going to leave.C. When the party is going on.第三节(共13小题, 每小题1分, 满分13分)听下面4段对话或独白。

武汉实验外国语学校2015~2016学年度初中三年级适应性训练(二)数学试卷(word版有答案)

武汉实验外国语学校2015~2016学年度初中三年级适应性训练(二)数学试卷(word版有答案)

武汉实验外国语学校2015~2016学年度初中三年级适应性训练(二)一、选择题1.抛物线y =-3(x -2)2+4的开口方向和顶点坐标分别是()A .向上,(2,4)B .向上,(-2,4)C .向下,(2,4)D .向下,(2,4)2.如图,有一圆心角为120°,半径为6的扇形.若将OA 、OB 重合后围成一个圆锥侧面,则圆锥的高为()A .22B .24C .26D .2123.已知方程ax 2+bx +c =0(a ≠0)的解是x 1=-5,x 2=3,那么抛物线y =ax 2+bx +c (a ≠0)与x 轴的两个交点的坐标分别是()A .(0,5),(0,-3)B .(-5,0),(3,0)C .(0,-5),(0,3)D .(5,0),(-3,0)4.在同一直角坐标系中一次函数y =ax +b 与二次函数y =ax 2+bx 的图象可能为()5.如图,在⊙O 中,半径OC ⊥弦AB 于P ,且P 为OC 的中点,则∠BAC 的度数是()A .45°B .60°C .20°D .30°6.某树主干长出若干数目的支干,每个支干又长出同样数目小分支,主干、支干和小分支总数是57.若设主干长出x 个支干,则可列方程是()A .(1+x )2=57B .1+x +x 2=57C .(1+x )x =57D .1+x +2x =577.已知二次函数y =ax 2+bx +c (a ≠0)的图象如图,则下列结论正确的有()个①a +b +c =0;②ax 2+bx +c =0的两根分别为-3和1;③b >2a ;④a -2b +c >0A .4B .3C .2D .1二、填空题(本大题共6个小题,每小题3分,共18分)1.边长为1的正三角形的半径为_________,中心角为_________,面积为_________2.抛物线1212-=x y 向右平移1个单位,再向下平移2个单位,所得到的抛物线是__________3.已知扇形的弧长为6π,半径是12,则它的圆心角是__________4.若抛物线y =2(x -2)2+k 过原点,则该抛物线与x 轴的另一个交点坐标为_________5.若关于x 的方程(a -1)x 2+2x -1=0是方程有实根,则a 的取值范围是_________6.如图,AB 与⊙O 相切于点B ,AO 的延长线交⊙O 于点C ,连接BC .若∠A =36°,则∠C =_________7.如图,在平面直角坐标系中,⊙A 与y 轴相切于原点O ,平行于x 轴的直线⊙A 于M 、N 两点.若点M 的坐标是(-4,-2),则弦MN 的长为_________8.Rt △ABC 中,∠C =90°,AC =5,BC =12,则△ABC 的内切圆半径为__________9.如图,点A 、B 的坐标分别为(1,4)和(4,4),抛物线y =a (x -m )2+n 的顶点在线段AB 上运动,与x 轴交于C 、D 两点(C 在D 的左侧),点C 的横坐标最小值为-3,则点D 的横坐标最大值为__________三、解答题(共8题,共72分)1.(本题8分)已知x 1、x 2是方程x 2-3x +m =0的两根,若x 1x 2·(x 1x 2-x 1-x 2)=-2,求m 的值2.如图,在平面直角坐标系中,△ABC 的三个顶点坐标分别为A (-2,1)、B (-1,4)、C (-3,2)(1)画出△ABC 关于y 轴对称的△A 1B 1C 1,并直接写出C 1点坐标(2)以原点O 为位似中心,相似比为21,在y 轴的左侧,画出△ABC 放大后的图形△A 2B 2C 2,并直接写出C 2点坐标(3)如果点D (a ,b )在线段AB 上,请直接写出经过(2)的变化后点D 的对应点D 2的坐标3.(本题8分)如图,点O 是四边形AEBC 外接圆的圆心,点O 在AB 上,点P 在BA 的延长线上,且∠PEA =∠ADE ,CD ⊥AB 于点H ,交⊙O 于点D(1)求证:PE 是⊙O 的切线(2)若D 为劣弧BE 的中点,且AH =16,BH =9,求EG 的长4.(本题10分)某商场销售甲、乙两种型号的节能灯,甲型灯的进价为每只25元,售价为每只30元(1)乙型灯的售价为每只60元,且销售甲、乙两种型号的节能灯每只的利润率之比为3∶5,求每只乙型灯的进价(2)若乙型灯的进价不变,经调查,若乙型灯的销售量y(只)与乙型灯的售价x(元)之间满足函数关系y=-2x+200(60<x<90)①若销售乙型灯获得的利润比销售相等数量的甲型灯获得的利润的3倍还多800元,求此时乙型灯的售价②商场决定每销售一只乙型灯,就捐款a元利润(a≥1)给希望工程,通过销售记录发现,当每只乙型灯的售价大于75元时,扣除捐赠后的利润随x的增大而减小,直接写出a的取值范围5.(本题12分)已知抛物线C1的顶点为E(1,4),与y轴交于C(0,3)(1)求抛物线C1的解析式(2)如图1,过顶点E作EF⊥x轴于F点,交直线AC于D.点P、Q分别在抛物线C1和x轴上,若Q(t,0),且以EDPQ为顶点的四边形为平行四边形,求t的值。

2024学年湖北省武汉市武汉外校中考三模英语试题含答案

2024学年湖北省武汉市武汉外校中考三模英语试题含答案

2024学年湖北省武汉市武汉外校中考三模英语试题含答案请考生注意:1.请用2B铅笔将选择题答案涂填在答题纸相应位置上,请用0.5毫米及以上黑色字迹的钢笔或签字笔将主观题的答案写在答题纸相应的答题区内。

写在试题卷、草稿纸上均无效。

2.答题前,认真阅读答题纸上的《注意事项》,按规定答题。

Ⅰ. 单项选择1、Guo Degang is a famous crosstalk performer. He always makes people __________.A.laughs B.laugh C.laughing D.to laugh2、My mother refuses ________ me to the weekend training centre for extra classes.A.to send B.sending C.sent D.sends3、Which of the pictures below tells people not to drive after drinking?A.B. C.D.4、The train in an hour. I must go to the train station right now.A.left B.leaveC.will leave D.has left5、-I have a problem. I don't know what to do.-Let's ask Dick for help. He can _________a good idea to solve your problem.A.think up B.give up C.hang out D.laugh at6、-- Would you like me to help you?-- ___________________ .A.It doesn’t matter B.Yes, I can do it myselfC.Not at all D.Thanks, I can manage it myself7、—Would you like some more noodles, Celia?—Yes, just _________, please.A.a few B.few C.a little D.little8、— Cindy never eats the food that ______ and often pours it away.—But it’s really wastefull to do so.A.stays B.keeps C.remains D.leaves9、—Susan has bought a large house with a swimming pool.—It ________ be very expensive. I never dream about it.A.must B.might C.can’t D.shouldn’t10、- Work hard, Tom. And if you , you’ll succeed. - OK. I will.A.are B.do C.have D.willⅡ. 完形填空11、完形填空阅读下面一篇短文,理解大意,然后从各小题的四个选项中选出一个最佳答案,使短文连贯完整。

武汉外国语学校2021-2022学年度初中三年级理化练习(三)(word版含答案)

武汉外国语学校2021-2022学年度初中三年级理化练习(三)(word版含答案)

2021-2022学年度武汉外国语学校初中三年级练习(三)物理化学试题可能用到的相对原子质量:H-1C-12O-16Na-23Cl-35.5Fe-56Ca-40Mg-24Cu-64Zn-65S-32可能用到的物理常量∶g=10N/kg第Ⅰ卷(选择题,共60分)一、选择题(本题包括20小题,每小题只有1个正确选项。

每小题3分,共60分)1.下列过程中没有发生化学变化的是A.牛奶发酵过程中某些菌种使牛奶中的部分蛋白质分子被分解成小分子B.海水制金属镁C.用75%酒精杀菌消毒D.制糖工业中用活性炭脱色2.化学用语是国际通用的语言,下列化学用语不正确的是A.Ca 2+:1个钙离子带2个单位的正电荷B.H 2:2个氢原子C.硫离子结构示意图D.铁原子中的质子数为263.下列实验方案,不能达到相应实验目的的是A.比较空气与人体呼出的气体中CO 2的含量B.探究MnO 2能否加快H 2O 2分解C.验证燃烧需要温度达到可燃物的着火点D.探究CO 2对铜生锈是否有影响4.化学概念间有包含、交叉等关系。

下列关系表示错误的是A.B.C.D.5.下列图象与对应的叙述相符合的是A.图A 是一定温度下,向接近饱和的硝酸钾溶液中不断加入硝酸钾固体B.图B 是在某一密闭的装置内点燃白磷C.图C 是将等质量的Mg、Fe 分别与溶质质量分数相同的足量稀硫酸反应D.图D 是分别向相同的CuSO 4溶液(足量)中加入质量相等的锌粉和铁粉6.如图所示,装置气密性良好。

现向圆底烧瓶a、b 中分别加入一定质量的两种固体,再各滴加10mL 的稀盐酸(足量)。

观察到在U 形管中左边液面上升,右边液面下降;一段时间后左边液面下降,右边液面上升,最终左右两边液面高度相平。

则a、b 中加入的固体分别是下列四组物质中的是7.有一包固体粉末X,可能含有碳酸钙、硫酸铜、硫酸亚铁、镁粉。

为确定固体粉末的成分,现取X 进行下列实验,实验过程及现象如图所示(不考虑水、稀盐酸的挥发;碳酸钙与硫酸铜、硫酸亚铁不发生反应;硫酸铜和硫酸亚铁均易溶于水)。

武汉外国语学校初中三年级适应性训练英语试题

武汉外国语学校初中三年级适应性训练英语试题

武汉外国语学校初中三年级适应性训练英语试题武汉外国语学校初中三年级适应性训练英语试题第⼆部分笔试部分⼆、选择填空(本题共15分,每⼩题1分)26.—Hi, Jim. How’ re you doing these days?--______.A. I’m good. Thank youB. It’s goodC. I’m hereD. Never mind27. I don’t like to travel to big c ities, because to me, one city is much like ____.A. anotherB. the otherC. otherD. either28.—Is your brother a reporter?--Yes, he is. He _______ in a TV station.A. has workedB. had workedC. worksD. worked29.—When did you become a volunteer?--Three months ago. I ________ this group since thenA. joined inB. took part inC. have joinedD. have been in30.—There are only three hours left for us to do the work.--We must finish it in time, so every minute ______ for us.A. countsB. costsC. influencesD. appreciates31.--______ your books, Tom. Don’t leave your things here and there.--OK, Mum.A. Put onB. Put offC. Put awayD. Put down32.—Whose wallet is this?--I think it’s the girl’s because it matches her ______.A. directionB. expressionC. instructionD. description33.—Could I speak to Mary, Mrs. Brown?--Sorry , she is out to the bookst ore. She ______ be back after four o’clock.A. needB. mayC. mustD. can34.—It’s reported that a powerful earthquake ______ Sendai, Japan, at 1:46 pm on Mar. 11, 2011.A. knockedB. rockedC. attackedD. happened35.—Mum, there are so many guests that we can’t put them up for the night.--Never mind. Two sofas can _____ as guest beds.A. regardB. useC. provideD. serve36. The gentle smile of Mrs. Green _______ memories of his mother.A. called upB. called inC. called atD. called on37.—I can’t open this jar.--Well, let me have a (n) _______.A. handB. open C . tooth D. go38.—What are you going to do after this big exam?--I will have a _______ sleep. You know. I’ve been always staying up late for it recently.A. fastB. bigC. soundD. loud39.—About time, I think many people can’t make good use of it.--_______.A. That’s all ri ghtB. Never mindC. It serves you rightD. You have a point40.—Could you please tell me _____?--Sorry, I don’t know, either.A. what was the machine used forB. where is the police stationC. what time does the class beginD. when Jim will come back.三、完形填空(本题共15分,每⼩题1分)The United States is full of automobiles(机动车).There are still many families without cars.B u t some families have two or 41 more. However, cars are used for 42 than pleasure. They are a 43 part of life.Cars are 44 for business. They are driven to offices and factories by workers who have no 45 way to get to their jobs. When salesmen are sent to 46 parts of the city, they have to drive in order to carry their products. Farmers have to drive into the city in order to shop for necessities.Sometimes small children must be driven to 47 . Some cities school buses are used only when children live more than a mile from the school. When the children are 48 young to walk that far, their mothers take 49 to drive them to school. One 50 drives on Mondays, taking her children and the neighbor’s children as well. Another mother drives on Tuesdays, a n o t h e r on Wednesdays, and so on. This is called forming a car pool. Men also form car pools, with three or four men taking turns driving to the place 51 they work.More car pools should be formed in order to put 52 motorcars on the road and to use l e s s 53 . Parking is a great problem, and so is the traffic in and around cities. 54 many carsare being driven. Something will have to be done 55 the use of cars.41. A. even B. much C. little D. such42. A. better. B. less C. more D. farther43. A. great B. necessary C. proper D. possible44. A. bought. B. used C. produced D. sold45. A. other B. long C. short. D. easy46. A. busy. B. some. C. many D. different47. A. cities B. schools. C. parks D. gardens48. A. quite B. very C. too D. so49. A. money. B. time C. pride D. turns50. A. mother B. child. C. way D. car51. A. where B. that. C. while. D. when52. A. more. B. fewer C. many D. less53. A. time B. space C. energy D. oil54. A. So. B. Even. C. V ery. D. Such55. A. on. B. for C. from. D. about四、阅读理解(本题共30分,每⼩题2分)56. The book of It’s Disgusting and We Ate It! Is about ______.A. foodB. Morse codeC. Albert EinsteinD. superhero57. Mary is a five-year-old girl, and she can read ______.A. It’s Disgusting and We Ate ItB. Radio RescueC. Odd Boy Out.D. Boys of Steel58. The book of Odd Boy Out is written by ____.A. James SolheimB. Lynne BaraschC. Don BrownD. Marc Tyler Nobleman59. Which is NOT true according to the passage?A. It’s Disgusting and We Ate It! Is filled with stories, facts and fascinating news about food.B. Robert Marx, a 10-year-old boy, saves a family stranded by a hurricane in Florida.C. Einstein understands mysteries that challenge his active mind for solutions when he is old.D. Boys of Steel is about two young men who dreamed up the world’s first superhero.60. The passage is probably _____.A. s storyB. news C a novel D. an advertisementBMy friend lived down the street from me. Our families got together sometimes to cook out. I always enjoyed playing at her house. Her dad was friendly and kind . He always asked: “How’re y o u doing?” and really listened to the answer. He had a shed in the back that was his workshop. He’dl e t us come out there with him and build with used wood. His workshop was very clean and orderly. I helped him build a bird feeder once. He fed lots of birds in their backyard.Elizabeth’s dad also had a bus license. For many years, he drove us kids on field trips and to sports games. Once he was diagnosed (诊所) with a serious heart condition, he decided it would b e best not to be driving a bus full of children. However, he always had a kind word and hug for us.His heart finally failed, and he passed away quietly in his sleep on Thursday night, Elizabeth knew dad’s condition was serious, but it was still very hard because just that morning he had been packing for a family camping trip. He never really let people see low weak he was getting. She came over my house on Friday morning, and we went out the backyard. She said,“I feel numb(呆滞). There’s so much going on at my house that I wanted to run away.” Then she stared to cry.I sat there silently. What do you say to someone when something like this happens? I just let Elizabeth talk.“Why did he have to die? He was such a great dad!”“I don’t know .” I replied while I put my arm around her shoulder.“Father’s Day is nest week. This will be terrible!” I’ll never be able to celebrate it again.”61. The writer has ever _______ in Elizabeth’s dad’s workshop.A. done some cookingB. done some cleaningC. helped build a bird feederD. fed the birds62. What did Elizabeth’s dad decide not to do after his heart was ill?A. To talk with the childrenB. To feed lots of birds in the yardC. To build anything with used wood.D. To drive a bus full of children63. What did the dad to on Thursday morning before he died?A. He was ill in bedB. He went to work as usualC. He packed for a family camping trip.D. He worked in the shed all the morning.64. My friend felt ______ about her father’s death.A. numbB. sadC. calmD. relaxed65. What’s the best title for this article?A. My Best FriendB. My Best Friend’s FatherC. Father’s Day Is Coming.D. My Happy Days with FriendsCParent-child book clubs offer you and your child a way to share books, experiences and f e e l i n g s together. Many parent and children report feeling closer to one another after sharing books t o g e t h e r. In addition, book clubs may provide parents and children with a way to explore and discuss d i f f i c u l t topics in a safe way. You can learn more about the ways in which parent-child book clubs f o s t e r(培养) positive parent-child relationships by reading Shireen Dodson’s “The Mother-Daughter Book C l u b.”This book provides first-hand accounts of mothers and their daughters discussing the ways in w h i c h book clubs benefit them.In addition to helping you talk with your child about important issues(问题), book clubs p r o v i d e an enjoyable and easy way for your child to develop many literacy(读写能⼒)skills. Simply by reading books in preparation for book club meetings, your child will develop fluency or the ability t o read smoothly and with expression. In addition, he will learn new vocabulary words and meet new ideas and concepts. Through the discussion that takes place at book club meetings, your child will develop a deeper understanding of books, consider other’ s ideas on the same book and practice analyzing the books he reads.Finally, book clubs help children develop important language skills. Book discussion help children practice turn-taking , encourage them to use language to analyze things, make predictions(预测) and solve problems, and provide them with opportunities to try out new v o c a b u l a r y w o r d s.S i m p l y by reading and participating in discussing themselves, parents can provide important language and literacy models for their children.66. If parents and children read “The Mother-Daughter Book Club”, they can ______.A. improve positive parent-child relationshipsB. explore and discuss difficult topicsC. talk about important issuesD. get second-hand accounts67. Which is NOT true about the book club meetings?A. Children can develop fluency and the ability to read smoothly.B. Children can learn new words and ideas and concepts.C. Children can develop a better understanding of the booksD. Children can’t learn to practice analyzin g the books they read well.68. What cannot the book discussions in the book clubs do?A. They can help children practice turn-takingB. They can encourage children to analyzeC. They can’t make predictions and solve practical problemsD. They can’t give children the chances to learn new words.69. The underlined phrase “participating in” means “_____”.A. making upB. taking part inC. giving upD. playing a role in70. The passage mainly tells us ______.A . how to join books clubs B. the benefits of book clubsC. what to do book clubsD. how to develop different skills第II卷(⾮选择题,共35分)五、词与短语选择填空(本题共10分,每⼩题2分)仔细阅读下⾯五个句⼦,然后⽤下⾯⽅框中所给的单词或短语填空,使每个句⼦在结构、71. Do you think we should __________ Bob’s while we are in London?72. A lawyer is often __________ to write a will before one dies.73. Is she going to ___________ our suggestion?74. He didn’t __________ in my birthday party. I don’t know where he’s gone75. You are not allowed to _________ advertisements on his wall without special permission.六、阅读理解填词(本题共10分,每⼩题1分)In the middle of the 1800 s, France was considered the most important place in the world for a r t. One reason for that was the Academy, a government organization with some strict r 76 about art. It decided what could and could not be art. In order to be accepted by the Academy, an artist h a d to be very talented. Artists also had to paint exactly the way the Academy wanted them to. A brave group of painters c 77 these ideas and changed art forever.Each year, the Academy held an e 78 of the art they had decided was the best . In 1864, a group of artists became a 79 because they didn’t get into the show. They felt that their p a i n t i n g s were not had; the paintings were just d 80 . After complaining to the government, these artists were allowed to give their own show.The Academy thought all art should look realistic(逼真). But these artists were more i 81 in trying to show movement and the bright colors of daylight. In their opinion, it was more real to show these than it was to paint a scene which was as s 82 as a photo. It was also more interesting to show all of the different colors when light hits an object like water.By 1874, many different artists were painting in this new style, including Claude Monet. One o f his paintings had the title, Impression: sunrise. A critic (评论家) h 83 these new artists. He u s e d Monet’s title to make fun of these painters by calling them—Impressionists(印象派), meaning that they didn’t make real paintings . The critics who liked these artists thought the word was just right. They began to use it happily, They thought it was more important to paint h 84 they saw t h i n g s instead of just what they saw. Other artists around the world felt that they could have this freedom a s well. Because of the impressionists, the art w 85 was never the same.76. r________ 77. c_________ 78. e_________ 79. a_________ 80. d__________ 81. i________ 82. s_________ 83.h_________ 84. h_________ 85. w__________七、书⾯表达(本题共15分)“Life is just like a mirror, you smile at it, and it smiles at you, too.” 请你以“Learn to smile”为题,根据以下要点写⼀篇80--100词的短⽂。

武汉外国语学校2017-2018学年度初中三年级适应性训练(三)数学试卷

武汉外国语学校2017-2018学年度初中三年级适应性训练(三)数学试卷

2017-2018 学年度下学期武汉外国语学校初中三年级适应性训练(三)数学试卷考试时间: 120 分钟本卷满分: 120 分一、选择题(共10小题,每小题3分,共30分)1.实数13的倒数是()A.13B.3 C.-3 D.-132.运用乘法公式计算(a-2)2 的结果是()A.a2-4a+4 B.a2-2a+4 C.a2-4 D.a2-4a-43.下列说法正确的是()A.一组数据3,4,5,6,7,9 的中位数是6B.“x2 <0(x是实数)”是随机事件C.3个人分成两组,一定有2个人分在一组D.同时拋掷两枚质地均匀的硬币一次,出现两个正面朝上的概率为1 24.如图,在⊙O中,半径OC⊥弦AB于P,且P为OC的中点,则∠BAC的度数是()A.45°B.60°C.25°D.30°5.下列计算正确的是()A B±2 C.6a÷2a=3a D.23()a-=6a-6.如图是由几个大小相同的小正方体搭成的几何体的俯视图,小正方形中数字表示该位置小正方体的个数,则该几何体的主视图是().1123A.B.C.D.7.如图,在平面直角坐标系中,点A的坐标为(-1,以原点O为中心,将点A顺时针旋转150°到点A',则点A'坐标为()A.(0,-2)B.(1C.(2,0)D.1)8.初三(8)班体委用划记法统计本班40名同学投掷实心球的成绩,结果如右图所示: 则这40名同学投掷实心球的成绩的众数和中位数分别是()A.9,8 B.9,8.5,C.8,8 D.8,8.59.已知y =x (x +5-a )+2 是关于x 的二次函数,当x 的取值范围在1≤x ≤4时,y 在x =1时取得最大值,则实数a 的取值范围是( )A .a =10B .a = 4C .a ≥9D .a ≥1010.如图,边长为6的正方形ABCD 内部有一点P ,BP = 4,∠PBC = 60°,点Q 为正方形边上-动点,且△PBQ 是等腰三角形,则符合条件的Q 点有( )个A .4B .5C .6D .7二、填空题(本大题共6 个小题,每小题3 分,共18 分)11.计算tan 45°= .12.抛物线y =-x 2+ 6x -1的顶点坐标是 .13.布袋中装有3个红球和6个白球,它们除颜色外其它都相同,如果从布袋里随机摸出一个球,那么所摸到的球恰好为红球的概率是 .14.己知关于x 的一元二次方程x 2+(k -5)x +1-k = 0(其中k 为常数)一个根大于3,另一个根小于3.,则k 的最大整数值为 .15.如图,D 为△ABC 内一点,且AD = BD ,若∠ACD =∠DAB =45°,AC =5,则S △ABC = .16.如图,已知: Rt △ABC 中,AD 是斜边BC 边上的高,其中,BD =4,AD =3.两动点P 、Q 同时从D 点出发,点Q 沿线段从D →A →C 运动,其中D →A 运动速度为3; A →C 运动速度为4.点P 沿线段从D →B →A 运动,运动速度始终为4.当Q 到达C 点时,P 、Q 停止运动.若线段PQ 中点为M ,则整个运动过程中点M 的运动路径长 .三、解答题(共8题,共72分)17.(本题8分) 解方程:5x -3= 7(x -1)18.(本题8分) 如图,点B 、C 、E 、F 在同-直线上,BC =EF ,AC ⊥BC 于点C ,DF ⊥EF 于点F ,AC =DF 求证:AB //DE19.(本题8分)“端午节”是我国的传统佳节,民间历来有吃“粽子”的习俗,我市某食品厂为了解市民对去年销售量较好的肉馅粽、豆沙粽、红枣粽、蛋黄馅粽(以下分别用A 、B 、C 、D 表示这四种不同口味粽子的喜爱情况,在节前对某居民区市民进行了抽样调查,并将调查结果绘制成如下两幅统计图.请根据以上信息回答:(1)本次参加抽样调查的居民有多少人?(2)将不完整的条形图补充完整.(3)若居民区有8000 人,请估计爱吃D 粽的人数?(4)若有外型完全相同的A 、B 、C 、D 粽各一个煮熟后,小王吃了两个,用列表或画树状图的方法,求他第二个吃到的恰好是C 粽的概率?20.(本题8分)某市政府出台了相关政策: 由政府协调,本市企业按成本价提供产品给大学毕业生自主销售,成本价与出厂价之间的差价由政府承担.某生按照相关政策投资销售本市生产的一种新型节能灯.已知这种节能灯的成本价为每件10元,出厂价为每件12元,每月销售量y (件)与销售单价x (元)之间的关系满足一次函数:y =-10x +500.(1)该生在开始创业的第一个月将销售单价定为20元,那么政府这个月为他承担的总差价为多少元?(2)设李明获得的利润为w (元),当销售单价定为多少元时,每月可获得最大利润?21.(本题8分)如图,在△ABC ,AB =AC ,以AB 为直径的⊙O 分别交AC 、BC 于点D 、E ,点F 在AC 的延长线上,且∠CBF =12∠CAB .(1)求证:直线BF 是⊙O 的切线;(2)若AB =10,sin ∠CBF .求BC 和BF 的长. 22.(本题10分)如图1,在平面直角坐标系中,直线AB : y = kx +b (k <0)交坐标轴于A ,B 两点,与双曲线y =m x(x >0)的相交于点M ,N .若b =6,则点M ,N 的横坐标分别为3和6.(1)试求k和m的值;(2)将直线AB向下平移到与双曲线只有一个公共点的位置(如图2所示).①求出此时b的值;②P为双曲线上的一点,经过点P作坐标轴的垂线,垂足分别为H和G.此时,直线AB分别与直线PG、直线PH相交,交点分别为C和D,试直接写出AD BC的值为.23.(本题10分)已知△ABC中,D为AB边上任意一点,DF//AC交BC于F,AE//BC,∠CDE=∠ABC=∠ACB=a (1)如图1,当a=60°时,求证:△DCE是等边三角形;(2)如图2,若a=45°,求CDDE的值;(3)如图3,当a为任意锐角时,求线段CD与CE的数量关系(用a表示).24.(本题12分)己知抛物线y=a(x2-2mx-3m2)(m>0)交x轴于A,B两点(其中A点在B点左侧),交y 轴于点C(1)若A点坐标为(-1,0),则B点坐标为.(2)如图1,在(1)的条件下,且am=1,设点M在y轴上且满足∠OCA+∠AMO=∠ABC,试求点M的坐标(3)如图2,在y轴上有一点P(0,n)(点P在点C下方),直线P A,PB分别交抛物线E,F,若PAPE=35,求PF PB.。

武汉实验外国语学校2017~2018学年度初中三年级适应性训练(四)数学试卷教师版

武汉实验外国语学校2017~2018学年度初中三年级适应性训练(四)数学试卷教师版

武汉实验外国语学校2017~2018学年度初中三年级适应性训练(四)数学试卷一、选择题(共10小题,每小题3分,共30分)1.武汉某天的最高气温是7℃最低气温是-3℃,那么当天的温差是( )℃ A .4B .10C .-10D .-4答案选:B 2.要是分式x21有意义,则x 的取值范围是( ) A .x >2B .x <2C .x ≠-2D .x ≠2答案选:D3.下列运算正确的是( ) A .5a 2+3a 2=8a 4B .a 3·a 4=a 12C .a +2b =2abD .a 5÷a 2=a 3答案选:D4.一个密闭不透明的盒子里有若干个白球和黑球,在不允许将球倒出来的情况下,摇匀后从中随机摸出一个球记下颜色,再把它放回盒中,不断重复,共摸球400次,其中80次摸到黑球,估计摸到白球的概率为( ) A .0.4 B .0.2 C .0.8 D .0.6答案选:C5.用乘法公式进行简单的计算(a +2b )(a -2b )的结果是( ) A .a 2-4b 2B .a 2-2b 2C .a 2+4b 2D .-a 2+4b 2答案选:A6.已知点C 的坐标为(-3,1),则点C 关于y 轴的对称点C ′的坐标是( ) A .(3,1)B .(-3,-1)C .(1,-3)D .(3,-1)答案选:A7.如图,下列几何体的左视图不是矩形的是( )答案选:B8.在武汉教育电视台组织的一次汉子听写大赛中,10名参赛选手得分情况如下:人数 3 4 2 1 分数808590 95 那么这10名选手所得分数的中位数和众数分别是( )A .85和85B .85.5和85C .85和4D .85.5和4答案选:A9.如图,动点P 从(0,3)出发,沿所示方向运动,每当碰到矩形的边时反弹,反弹时反射角等于入射角.当点P 第2018次碰到矩形的边时,点P 的坐标为( ) A .(1,4)B .(7,4)C .(6,4)D .(8,3)答案选:B10.如图,菱形ABCD 中,∠B =60°,AB =2.若点P 是菱形ABCD 内部一点,满足△PBC 是等腰三角形,则线段PD 的长不可能是( ) A .232-B .334 C .7 D .25解:构成等腰的方式:① 作圆;② 垂直平分线当P 在线段BC 的垂直平分线上时 ① P 在A 点处时,PD =AD =2 ② P 在BC 的中点处时,PD =7 PD 的范围为:72<≤PD 答案选:C二、填空题(本大题共6个小题,每小题3分,共18分) 11.化简327-的结果是___________解:-312.计算:1112---x x x =___________ 解:x +113.有三辆车按1、2、3编号,小童、小郑两人可任意选坐一辆车,则两人同坐3号车出游的概率为__________ 解:9114.如图,AB ∥CD ,点E 在BC 上,CD =CE .若∠ABC =34°,则∠BED 的度数是_________解:107°15.如图,△ABC 中,∠A =90°,点D 是AC 边上一点,∠ABD =∠C ,CD =52,tan ∠DBC=32,则AB 的长是___________解:在线段BC 上截取DE =CE ,过点E 作EF ⊥CD 于F∵∠ABD =∠C =∠EDC ∴Rt △ABD ∽Rt △FDE ∵∠A =90°∴∠ABD +∠ADB =90° ∴∠ADB +∠FDE =90° ∴∠BDE =90° ∵tan ∠DBC =32=BD DE ∴32==BD DE AB DF ,AB =253 16.二次函数y =x 2-2x -3,当m -2≤x ≤m 时函数有最大值5,则m 的值可能为___________解:① 当m =2时,m -2、m 距离对称轴的距离相等② 当m >2时,在x =m 处取得最大值 m 2-2m -3=5,解得m 1=4,m 2=-2(舍去) ② 当m <2时,在x =m -2处取得最大值(m -2)2-2(m -2)-3=5,解得m 1=0,m 2=6(舍去) 综上所述:m =0或4三、解答题(共8题,共72分)17.(本题8分)解方程组:⎩⎨⎧=--=13432y x x y解:⎩⎨⎧==54y x18.(本题8分)如图,AC =DC ,BC =EC ,∠ACD =∠BCE ,求证:∠A =∠D证明:∵ACD =∠BCE∴∠ACD +∠ACE =∠BCE +∠ACE 即∠ACB =∠DCE 在△ACB 和△DCE 中 ⎪⎩⎪⎨⎧=∠=∠=EC BC DCE ACB DC AC∴△ACB ≌△DCE (SAS ) ∴∠A =∠D19.(本题8分)初三年级教师对试卷讲评课中学生参与的深度与广度进行评价调查,其评价项目为主动质疑、独立思考、专注听讲、讲解题目四项.评价组随机抽取了若干名初中学生的参与情况,绘制成如图所示的频数分布直方图和扇形统计图(均不完整),请根据图中所给信息解答下列问题:(1) 在这次评价中,一共抽查了_________名学生,请将条形图补充完整 (2) 在扇形统计图中,项目“主动质疑”所在的扇形的圆心角的度数为度(3) 如果全市有6000名初三学生,那么在试卷评讲课中,“独立思考”的初三学生约有多少人? 解:(1) 560(2) 54 (3)180********168=⨯ 20.(本题8分)某市水果批发欲将A 市的一批水果运往本市销售,有火车和汽车两种运输方式,运输过程中的损耗均为200元/时,其它主要参考数据如下:运输工具 途中平均速度(千米/时)运算(元/千米)装卸费用(元)火车 100 15 2000 汽车8020900(1) 如果汽车的总支出费用比火车费用多1100元,你知道本市与A 市之间的路程是多少千米吗?请你列方程解答(2) 如果A 市与某市之间的距离为S 千米,你若是A 市水果批发部门的经历,要想将这种水果运往其他地区销售,你讲选择哪种运输方式比较合算呢? 解:(1) 设本市与A 市之间的路程是x 千米90020200801100200015200100++∙=+++∙x xx x ,解得x =400 (2) 火车的运输费用为200017200015200100+=++∙s s s汽车运输的费用为9005.229002020080+=++∙s s s当17s +2000=22.5s +900,解得s =200 当s >200时,选择火车运输 当s <200时,选择汽车运输 当s =200时,两种方式都一样21.(本题8分)如图,⊙O 是△ABC 的外接圆,AC 为直径,BD =BA ,BE ⊥DC 交DC 的延长线于点E(1) 求证:BE 是⊙O 的切线(2) 若EC =1,CD =3,求cos ∠DBA证明:(1) 连接BO 并延长交AD 于F ,连接OD∵BD =BA ,OA =OD ∴BF 为线段AD 的垂直平分线 ∵AC 为⊙O 的直径 ∴∠ADC =90° ∵BE ⊥DC∴四边形BEDF 为矩形 ∴∠EBF =90° ∴BE 是⊙O 的切线(2) ∵O 、F 分别为AC 、AD 的中点 ∴OF =21CD =23∵BF =DE =1+3=4 ∴OB =OD =25234=-∴cos ∠DBA =cos ∠DOF =532523==OD OF22.(本题10分)已知点A (1,2)为反比例函数xy 2=图象上一点 (1) 将点A 沿x 轴正方向平移1个单位,对应点A ′的坐标为___________ 将比例函数xy 2=图象沿x 轴正方向平移1个单位,平移后的函数解析式为___________ 将比例函数xy 2=图象沿x 轴正方向平移m 个单位,平移后的函数解析式为___________ (2) 在平面直角坐标系中,矩形ABCD 位置如图,其中A 、B 、C 三点的坐标分别为A (1,-1)、B (1,-2)、C (4,-2).现将反比例函数xy 2=图象沿x 轴正方向平移,若平移速度为每秒1个单位长度① 设函数图象平移时间为t 秒,求函数图象与矩形 ABCD 有公共点时t 的取值范围② 在平移过程中,当函数图象与矩形ABCD 有公共 点时,则函数图象扫过的区域夹在直线AD 、BC 的图 形面积为___________(直接写出答案) 解:(1) A ′(2,2)12-=x y mx y -=2(2) ① 经过时间t 后反比例函数的解析式为tx y -=2 当函数图象经过点B 时,212-=-t,解得t =2 当函数图象经过点D 时,142-=-t,解得t =6 ∴2≤t ≤6② 平行四边形,长为4,高为1,那么面积为423.(本题10分)已知:△ABC 中,点D 、E 分别是边AC 、BC 上的两点,DE 交AB 的延长线于点F(1) 如图1,若∠CDE =∠FBE ① 求证:AB ·AF =AD ·AC② 若AC =4,AB =1,BE =2CE ,求线段BF 的长(2) 如图2,若tan ∠DEC =tanA =2,AB =5,BC =13,求BFEF的值证明:(1) ① ∵∠CDE =∠FBE∴∠ADF =∠ABC 又∠DAF =∠BAC ∴△ADF ∽△ABC ∴ACAFAB AD =∴AD ·AC =AB ·AF ② 由①可知:41==AC AB AF AD 设AD =a ,则AF =4a ,BF =4a -1 过点C 作CG ∥DF 交AF 的延长线于点G ∵21==CE BE FG BF ∴FG =2BF =8a -2,AG =AF +FG =12a -2 ∵DF ∥CG∴AC AD AG AF =,即42124aa a =-,解得23=a∴BF =4a -1=5(3) 辅助线一样,过点C 作CG ∥DF 交AF 的延长线于点G ∴BGCGBF EF =过点B 作BH ⊥AC 于H ∵tanA =2=AHBH∴BH =2,AH =1 ∵BC =13 ∴AC =4,CH =3∵∠BCG =∠BEF =∠DEC =∠A ∴△BCG ∽△CAG ∴CGAGBG CG =此题有问题:无法证明:△ABC ∽△ACG24.(本题12分)已知:抛物线y =a (x -m )(x +3m )(a <0,m >0)与x 轴交于A 、B 两点(点A 在点B 的左边),与y 轴交于点C ,直线l :y =kx +b 经过点B ,且与该抛物线有唯一公共点,平移直线l 交抛物线于M 、N 两点(点M 、N 分别位于x 轴上方和下方)(1) 若21-=a ,C (0,23)① 求该抛物线的解析式② 如图1,连接AM 、AN ,求证:∠MAB =∠NAB (2) 如图2,连接MC .若MC ∥x 轴,求ANAM的值解:(1) ① 当21-=a 时,)3)((21m x m x y +--=将C (0,23)代入)3)((21m x m x y +--=中,得23232=m ,m =±1 ∵m >0 ∴m =1∴2321)3)(1(212+--=+--=x x x x y② 过点M 作MD ⊥x 轴于D ,过点N 作NE ⊥x 轴于E 设直线l :y =kx -k ,M (x 1,y 1)、N (x 2,y 2)联立⎪⎩⎪⎨⎧+--=-=23212x x y kkx y ,整理得0)23(2)1(2212=+-++k x k x∵直线l 与抛物线只有一个公共点 ∴△=4(k +2)2=0,解得k =-2 设直线MN :y =-2x +t联立⎪⎩⎪⎨⎧+--=+-=232122x x y tx y ,整理得x 2-2x +2t -3=0∴x 1+x 2=2,x 1x 2=2t -3∴AD ·NE -AE ·MD =(x 1+3)(-y 2)-(x 2+3)y 1=4x 1x 2+(6-t )(x 1+x 2)-6t =4(2t -3)+(6-t )·2-6t =0 ∴AD ·NE =AE ·MD 即NEMDAE AD =又∠MDA =∠NEA =90° ∴△MDA ∽△NEA ∴∠MAB =∠NAB(2) y =a (x 2+2mx -3m 2)=ax 2+2amx -3am 2 设直线l :y =kx +b将B (m ,0)代入y =kx +b 得,km +b =0,b =-km ∴y =kx -km联立⎪⎩⎪⎨⎧-+=-=2232amamx ax y km kx y ,整理得ax 2+(2am -k )x -3am 2+km =0 ∴△=(2am -k )2-4a (-3am 2+km )=0,得k =4am ∴直线l :y =4amx -4am 2 ∴M (-2m ,-3am 2)∴直线MN 的解析式为:y =4amx +5am 2联立⎪⎩⎪⎨⎧-+=+=2223254amamx ax y am amx y ,整理得ax 2-2amx -8am 2=0∴x M ·x N =-8m 2 又x M =-2m ∴x N =4m ∴N (4m ,21am 2)∴AM 2=m 2+9a 2m 4,AN 2=49m 2+212a 2m 4 ∴49122=AN AM ,71=AN AM。

武汉外校三年级试题及答案

武汉外校三年级试题及答案

武汉外校三年级试题及答案一、选择题(每题2分,共20分)1. 武汉外校位于我国的哪个省份?A. 湖北省B. 湖南省C. 河南省D. 江西省答案:A2. 以下哪个不是武汉的著名景点?A. 黄鹤楼B. 东湖C. 长江大桥D. 故宫答案:D3. 武汉外校三年级的学生通常多大年龄?A. 8-9岁B. 9-10岁C. 10-11岁D. 11-12岁答案:B4. 以下哪个不是武汉的特色小吃?A. 热干面B. 豆皮C. 鸭脖D. 煎饼果子答案:D5. 武汉外校三年级的数学课程中,以下哪个概念是重点?A. 加法B. 减法C. 乘法D. 除法答案:C6. 武汉外校三年级的英语课程中,学生们主要学习什么?A. 单词B. 语法C. 听力D. 口语答案:A7. 武汉外校三年级的科学课程中,学生们学习了哪种植物的生长过程?A. 玫瑰B. 向日葵C. 菊花D. 水仙答案:B8. 武汉外校三年级的体育课程中,学生们主要学习哪种运动?A. 篮球B. 足球C. 乒乓球D. 羽毛球答案:D9. 武汉外校三年级的美术课程中,学生们学习了哪种绘画技巧?A. 水彩画B. 油画C. 素描D. 国画答案:C10. 武汉外校三年级的音乐课程中,学生们学习了哪种乐器?A. 钢琴B. 小提琴C. 吉他D. 长笛答案:A二、填空题(每空1分,共10分)1. 武汉外校的校训是“_”,强调了学生应具备的品德。

答案:厚德载物2. 武汉外校三年级的学生每周上_节数学课。

答案:53. 武汉外校三年级的学生在体育课上学习了_的基本技巧。

答案:羽毛球4. 武汉外校三年级的英语课程中,学生们学习了_个字母。

答案:265. 武汉外校三年级的科学课程中,学生们了解了植物的_过程。

答案:生长三、简答题(每题5分,共20分)1. 请简述武汉外校三年级学生在语文课上学习了哪些古诗文?答案:学生们学习了《静夜思》、《春晓》等古诗文,通过这些古诗文的学习,学生们不仅能够了解古代诗人的情感表达,还能学习到丰富的文学知识和传统文化。

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武汉外校2015~2016学年度下学期初中三年级适应性训练(三)
参考答案
一、选择题(共10小题,每小题3分,共30分) 题号 1 2 3 4 5 6
7 8 9 10 答案 B C A C B B
C D C A 10.提示:过点D 作DE ⊥AC 于E
∴tan ∠OED =tan ∠OBC =21
设OE =x ,DE =2x ,则OD =OA =x 5
∴tan ∠ADO =tan ∠DOA =AE DE
二、填空题(共6小题,每小题3分,共18分)
11.5 12.6.75×104
13.31 14.15° 15.23
16.337<≤n 或n =4 15.提示:以AB 为斜边作等腰直角三角形ABD
∵2==BD AB
BP CB
,△CBA ∽△PBD
∴AC =2PD
∵点P 在以M 为圆心,1为半径的圆上
∴PD 的最大值为3
∴AC 的最大值为23
三、解答题(共8题,共72分)
17.解:x =1
18.解:略
19.解:(1) 560
(2) 54°
(3) 84人
20.解:(1) x
y 8-=,y =-x -2 (2) t <0或t >1
21.证明:(1) 连结OC
∵C 为弧AE 的中点
∴OC ⊥AE
∵PC 是⊙O 的切线
∴PC ⊥OC
∴PC ∥AE
(2) 设OC 与AF 交于点M
∴sin ∠MAO =sinP =5
3 设OM =3a ,OA =5a ,则AM =ME =4a ,CM =5a -3a =2a ∵△CMF ∽△AMO ∴
AO CF AM CM = 即a
a a 5542=,a =2 ∴BE =6a =12
22.解:(1) 证明:∵DF ⊥AB ,AD 、BE 是△ABC 的高 ∴∠BFD =∠AFD =∠AEB =∠ADB =90°
∴∠FBM =90°-∠BAC ,∠N =90°-∠BAC
∴∠FBM =∠N
∵∠FBM =∠N ,∠BFD =∠AFD
∴△BFM ∽△NF A
(2) DF 2=FM ·FN
∵△BFM ∽△NF A
∴FA
FM FN FB =,∴FM ·FN =FB ·F A ∵∠FBD +∠FDB =90°,∠FBD +∠F AD =90° ∴∠FDB =∠F AD
∵∠BFD =∠AFD ,∠FDB =∠F AD ,∴△BFD ∽△DF A ∴FA
DF DF FB =,DF 2=FB ·F A ∴DF 2=FM ·FN
(3) ∵AC =BC ,∴∠BAC =∠ABC
∵ ∠ABC +∠FDB =∠BAC +∠N =90°
∴∠FDB =∠N =∠FBM
∴21tan tan ==∠=N FBM FB FM ,21tan tan ==∠=N FDB FD FB ∴FB =2FM ,FD =2FB =4FM
∵DF 2=FM ·FN ,∴(4FM )2=FM ·(4FM +12) 解得FM =1或FM =0(舍去)
∴FB =2,FD =4,FN =FD +DN =16
∵2
1tan ==N FN AF ∴AF =8,AB =AF +BF =10
在Rt △BFD 中,52422222=+=+=DF BF BD 在Rt △ADB 和Rt △ADC 中,AD 2=AB 2-BD 2=AC 2-CD 2
∴AC 2-(AC -52)2=102-(52)2,解得AC =55
23.解:(1) y =-3x 2+ax (3
21-≥
a x ) (2) 当a =30时,x ≥3
y =-3x 2+30x =-3(x -5)2+75
当x =5时,y 有最大值为75
(3) 当a =48时,x ≥9
当x =9时,y 有最大值为189 24.解:(1) 42
12+--=x x y (2) ∵PQ =AO =4,且P 、Q 关于抛物线的对称轴x =-1对称 ∴P 点的横坐标是-3
当x =-3时,y =
25 ∴P (-3,2
5) (3) 过点P 作PF ∥OC 交AC 于点F ∴OC
PF OE PE = ∵OC =4 ∴PF =
23 设F (x ,x +4) ∴42
12+--x x -(x +4)=23,解得x 1=-1,x 2=-3 当x =-1时,y =
29
当x =-3时,y =25 ∴k =29-或6
5-。

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