四川成都市实验外国语学校2020-2021第一学期高二第二阶段性考试数学(无答案)

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2023届四川省成都市实验外国语学校高三模拟考试(二)英语试题

2023届四川省成都市实验外国语学校高三模拟考试(二)英语试题

2023届四川省成都市实验外国语学校高三模拟考试(二)英语试题一、听力选择题1. What language does the woman know a little?A.Italian.B.French.C.German.2.A.He is not lazy at all.B.He prefers online shopping.C.He’s on the way to a physical store.D.He considers shopping offline a waste of time.3. When will the game begin?A.At 8: 00.B.At 8: 30.C.At 9: 00.4. What’s John doing now ?A.Playing football.B.Watching TV.C.Studying.5. Why didn’t the woman have breakfast?A.She is busy with her paper.B.She gets used to skipping it.C.She doesn’t think it’s important.二、听力选择题6. 听下面一段较长对话,回答以下小题。

1. What day is it today?A.Wednesday.B.Thursday.C.Friday.2. What has stopped the woman taking the table by the window?A.It’s already been reserved.B.It’s in the smoking area.C.It costs more.3. What does the man suggest the woman do?A.Try another restaurant.B.Choose an outdoor table.C.Make a reservation another day.7. 听下面一段较长对话,回答以下小题。

四川省成都市金牛实验中学外国语学校2021年高二数学文测试题含解析

四川省成都市金牛实验中学外国语学校2021年高二数学文测试题含解析

四川省成都市金牛实验中学外国语学校2021年高二数学文测试题含解析一、选择题:本大题共10小题,每小题5分,共50分。

在每小题给出的四个选项中,只有是一个符合题目要求的1. 设等差数列的前n项和为,若,,则当取最小值时,=()A.6B.7C.8D.9参考答案:A2. 如图,平面中两条直线和相交于点O,对于平面上任意一点M,若、分别是M到直线和的距离,则称有序非负实数对是点M的“距离坐标”.对于给定的常数,给出下列命题:①若,则“距离坐标”为的点有且仅有1个;②若,且,则“距离坐标”为的点有且仅有2个;③若,则“距离坐标”为的点有且仅有4个.上述命题中,正确命题的个数是A.0B.1C.2D.3参考答案:D略3. 命题“”的否定是()A. B..C. D.参考答案:A4. 已知圆M:(x﹣1)2+y2=,椭圆C:+y2=1,若直线l与椭圆交于A,B两点,与圆M相切于点P,且P为AB的中点,则这样的直线l有()A.2条B.3条C.4条D.6条参考答案:C【分析】讨论直线AB的斜率不存在和存在,利用点差法求得直线AB的斜率,根据k MP?k AB=﹣1,求得P点横坐标,确定在椭圆内,即可得到所求直线的条数.【解答】解:当直线AB斜率不存在时且与圆M相切时,P在x轴上,故满足条件的直线有两条;当直线AB斜率存在时,设A(x1,y1),B(x2,y2),P(x0,y0),由+y12=1,+y22=1,两式相减,整理得:=﹣?,则k AB=﹣,k MP=,k MP?k AB=﹣1,则k MP?k AB=﹣?=﹣1,解得:x0=,由<,可得P在椭圆内部,则这样的P点有两个,即直线AB斜率存在时,也有两条.综上可得,所求直线l有4条.故选:C.5. 设M=, 且a+b+c=1(其中a、b、c∈R+), 则M的取值范围是()A. B. C. D.参考答案:D6. 在空间中,设是不同的直线,是不同的平面,且,则下列命题正确的是()A. 若,则B. 若异面,则异面C. 若,则D. 若相交,则相交参考答案:D7. 算法的有穷性是指()A.算法必须包含输出 B.算法中每个操作步骤都是可执行的C.算法的步骤必须有限 D.以上说法均不正确参考答案:C8. 若方程C:(是常数)则下列结论正确的是()A.,方程C表示椭圆B.,方程C表示椭圆C.,方程C表示双曲线D.,方程C表示抛物线参考答案:C9. 已知集合,则( )A. [-1,0]B. [1,2]C. [0,1]D.(-∞,1]∪[2,+∞)参考答案:D 10. 如右图,A、B是⊙O上的两点,AC是⊙O的切线,∠B=70°,则∠BAC等于()A. 70°B. 20°C. 35°D. 10°参考答案:B二、填空题:本大题共7小题,每小题4分,共28分11. 若三角形内切圆的半径为,三边长为,,,则三角形的面积等于根据类比推理的方法,若一个四面体的内切球的半径为,四个面的面积分是,,,则四面体的体积______________.参考答案:略12. 设圆的弦AB的中点P,则直线AB的方程是______________.参考答案:13. 甲袋中放有大小和形状相同的小球若干,其中标号为0的小球为1个,标号为1的小球2个,标号为2的小球2个.从袋中任取两个球,已知其中一个的标号是1,则另一个标号也是1的概率为__________.参考答案:记“一个标号是”为事件,”另一个标号也是”为事件,所以。

四川省成都七中实验学校2020-2021学年高二下学期期中考试数学(理)试题

四川省成都七中实验学校2020-2021学年高二下学期期中考试数学(理)试题

【全国百强校】四川省成都七中实验学校2020-2021学年高二下学期期中考试数学(理)试题学校:___________姓名:___________班级:___________考号:___________一、单选题1.如图,直三棱柱111ABC A B C -中,若CA a =,CB b =,1CC c =,则1A B 等于( )A .a b c +-B .a b c -+C .b a c --D .b a c -+ 2.函数()sin x f x x e =+,则()'0f的值为( ) A .1 B .2 C .3 D .03.已知m ,n 表示两条不同直线,α表示平面,下列说法正确的是( )A .若//,//,m n αα则//m nB .若m α⊥,n α⊂,则m n ⊥C .若m α⊥,m n ⊥,则//n αD .若//m α,m n ⊥,则n α⊥ 4.函数()()1ln x f x x x =>的单调递减区间是( ) A .(1,)+∞ B .2(1,)e C .(1,)e D .(,)e +∞ 5.如图,在棱长为2的正方体1111ABCD A B C D -中,O 是底面ABCD 的中心,E 、F 分别是1CC 、AD 的中点,那么异面直线OE 和2016v v =所成角的余弦值等于A BC .45D .236.已知函数()sin f x x x =-,若12,,22x x ππ⎡⎤∈-⎢⎥⎣⎦且()()120f x f x +>,则下列不等式中正确的是( )A .12x x >B .12x x <C .120x x +>D .120x x +< 7.某几何体的三视图如图所示,且该几何体的体积是32,则正视图中的x 的值是( )A .2B .92C .32D .38.若对任意的0x >,恒有()ln 10x px p ≤->成立,则p 的取值范围是( ) A .()0,1 B .(]0,1 C .()1,+∞ D .[)1,+∞ 9.甲、乙两人约定在下午4:305:00~间在某地相见,且他们在4:305:00~之间到达的时刻是等可能的,约好当其中一人先到后一定要等另一人20分钟,若另一人仍不到则可以离去,则这两人能相见的概率是( )A .34B .89C .716D .111210.如图在一个60的二面角的棱上有两个点A 、B ,线段AC 、BD 分别在这个二面角的两个面内,并且都垂直于棱AB ,且1AB AC ==,2BD =,则CD 的长为( )A .2BCD .1 11.已知函数()32f x ax bx cx d =+++的图象如图所示,则12b a ++的取值范围是( )A .21,52⎛⎫- ⎪⎝⎭B .13,22⎛⎫- ⎪⎝⎭C .35,22⎛⎫- ⎪⎝⎭D .31,22⎛⎫- ⎪⎝⎭ 12.已知曲线()21:0,0C y tx y t =>>在点4,2M t ⎛⎫⎪⎝⎭处的切线与曲线12:1x C y e +=-也 相切,则24ln e t t的值为( ) A .24eB .8eC .8D .2二、填空题13.120x dx =⎰_______.14.已知椭圆22122:1(0)x y C a b a b+=>>与双曲线222:4C x y -=有相同的右焦点2F ,点P 是椭圆1C 与双曲线2C 在第一象限的公共点,若22PF =,则椭圆1C 的离心率等于_______.15.已知函数()()f x x R ∈的导函数为()f x ',满足()37f =,()2f x '<,则()21f x x <+的解集为_______.16.已知函数()211xme f x x x =-++,若存在唯一的正整数0x ,使得()00f x ≥,则实数m ∈_______.三、解答题17.如图,在直三棱柱111ABC A B C -中,AC BC ⊥,点D 是AB 的中点.求证:(1)1AC BC ⊥;(2)1//AC 平面1B CD .18.某校举行汉字听写比赛,为了了解本次比赛成绩情况,从得分不低于50分的试卷中随机抽取100名学生的成绩(得分均为整数,满分100分)进行统计,请根据频率分布表中所提供的数据,解答下列问题:(Ⅰ)求a b 、的值;(Ⅱ)若从成绩较好的第3、4、5组中按分层抽样的方法抽取6人参加市汉字听写比赛,并从中选出2人做种子选手,求2人中至少有1人是第4组的概率.19.已知函数()22ln f x x a x =+。

2020-2021成都市实验外国语学校(西区)小学数学小升初第一次模拟试题(附答案)

2020-2021成都市实验外国语学校(西区)小学数学小升初第一次模拟试题(附答案)

2020-2021成都市实验外国语学校(西区)小学数学小升初第一次模拟试题(附答案)一、选择题1.如图:r=3dm,这个扇形的面积是()dm2.A. 28.26B. 9.42C. 7.065D. 4.71 2.在下面边长是10cm的正方形纸中,剪去一个长6cm、宽4cm的长方形,下列四种方法中,剩下的部分()的周长最长.A. B. C.D.3.分别用5个大小相同的小正方体搭成下面的三个立体模型,从()看这三个立体模型的形状是完全一样的。

A. 前面B. 上面C. 左面4.甲、乙两数的比是3:4,那么甲比乙少().A. B. C. D.5.如图,阴影部分的面积相当于甲圆面积的,相当于乙圆面积的,那么甲、乙两个圆的面积是().A. 6: 1B. 5: 1C. 5: 6D. 6: 5 6.用6个同样大小的正方体拼成一个立体图形,从上面、正面和左面看到的形状完全一样,这个立体图形是()。

A. B. C.D.7.当a表示所有的自然数0,1,2,3,…时,2a表示()。

A. 奇数B. 偶数C. 质数D. 合数8.钟面上,时针经过1小时旋转了()度。

A. 30B. 60C. 180D. 3609.下列描述正确的是()A. 在图上可以找到-5、20、3.5三个数对应的点。

B. 上图中,直线上的数不是正数就是负数。

C. 在0和3之间的数只有1和2.10.把正方体的表面展开,可能得到的展开图是()。

A. B. C. D.11.一个零件长4毫米,画在图上长12厘米。

这幅图的比例尺是()。

A. 1:30B. 1:3C. 30:1D. 3:1 12.在一个圆中剪掉一个圆心角是90°的扇形,其余部分占整个圆面积的()A. B. C. D.二、填空题13.一个直角三角形两个锐角度数的比是1:4,则这两个锐角分别是________度和________度。

14.如图中∠1是________°,按边分是一个________三角形,它有________条对称轴.15.汽车与轿车的速度之比为5:7,两车同时从甲乙两地出发,相向而行,两车的相遇地点距离中点16km。

四川省成都市成都实验外国语学校2023-2024学年下学期新七年级分班(奖学金)真题数学试题

四川省成都市成都实验外国语学校2023-2024学年下学期新七年级分班(奖学金)真题数学试题

四川省成都市成都实验外国语学校2023-2024学年下学期新七年级分班(奖学金)真题数学试题一、单选题1.(分数的基本性质)把分数a 的分子扩大到原来的9倍,分母扩大到原来的11倍,得到一个新分数b ;把分数a 的分子扩大到原来的8倍,分母扩大到原来的9倍,得到一个新分数c .那么b 和c 比较( )A .b c >B .b c <C .b c =D .无法比较 2.(行程问题)从甲地到乙地,小明的平均速度是每分钟120米,已知他往返的平均速度是每分钟90米,那么他返回的平均速度是每分钟( )米.A .60B .72C .75D .1053.(百分数的应用)一件上衣,如果卖84元,可赚12%,如果要赚40%,那么应该卖( )元.A .98B .100C .105D .1144.(等量代换)王老师去买书,买4本故事书和8本漫画书共需136元,买同样的3本故事书和10本漫画书共需150元.8本故事书和4本漫画书共( )A .80B .50C .96D .1285.(分数、百分数的应用)某班的男生比全班人数的59少4人,女生比全班人数的40%多6人,那么这个班男生比女生少( )人.A .5B .3C .9D .10二、填空题6.开始时,王老师的积分券有120张,小明的积分券数量是小李的两倍.后来,王老师给小明和小李发了相同数量的积分券,现在三人的积分券数量之比为2:4:3.现在王老师还剩积分券( )张.7.(发车间隔问题)甲、乙两地是电车发车站,每隔一定时间两地同时发出一辆电车.小王骑自行车每隔12分钟就被一辆后面开来的电车追上,每隔8分钟就与一辆迎面开来的电车相遇.那么相邻两辆电车的发车时间相差分钟.8.(数字问题)小王家的WiFi 密码是一个六位数,其中左边三个数字是由小到大的3个连续自然数,右边三个数字都相同,6个号码的数字之和恰好等于末尾的两位数,这个WiFi密码是.9.(有理数的乘法)算式18152010⨯⨯⨯⋅⋅⋅⨯的乘积末尾有个连续的0.10.(倍数问题)1至40这40个自然数中,最多可以取出个个数,使得其中每两个数的和都不是4的倍数.11.(计数原理)甲、乙、丙、丁四人各有一个作业本混放在一起,4个人看也不看就随便各拿了1本,那么至少有一人拿错的可能有种.12.(行程问题)甲、乙两人进行百米赛跑,当甲到达终点时,乙在甲后面15米,如果甲、乙两人的速度保不变,要使甲、乙两人同时到达终点,甲的起跑线要比原来向后移动米.13.(行程问题)某人从山脚上山平均每小时行35千米,从山顶沿原路下山时平均每小时行40千米,往返一次共用7.5小时,山脚到山顶的距离是千米.14.(工程问题)甲、乙两管同时打开,10分钟就能注满水池.现在先打开甲管,9分钟后再打开乙管,再过4分钟就注满了水池.已知甲管比乙管每分钟多注入0.28立方米的水,那么这个水池的容积是立方米.15.某团体有100名会员,男会员与女会员的人数比是14:11,会员分三组,甲组人数与乙、丙两组人数之和一样多.各组男会员与女会员人数之比是:甲12:13,乙5:3,丙2:1,则丙有名男会员.三、解答题16.计算:(1)5223 522522526527523523÷+÷(2)2349899 1239798 34599100 129697 58112932964599100+++⋅⋅⋅+++++⋅⋅⋅++(3)5291113154143···6720304256420462 -+-+-++-(4)3818326 21334515965997118.513985⎛⎫-÷+⨯⎪⎝⎭⎛⎫-⨯⎪⎝⎭(5)121079289 21201514 x x x x----+=+17.(组合图形求面积)如图,长方形ABCD 的面积为2平方厘米,2EC DE =,F 是DG 的中点,则阴影部分的面积是多少?18.(组合图形求面积)如图ABCD 是平行四边形,8cm AD =,10cm AB =,30DAB ∠=︒,高4cm CH =,弧BE 、DF 分别以AB 、CD 为半径,弧DM 、BN 分别以AD 、CB 为半径,阴影部分的面积为多少?(π取3)19.(工程问题)某车间有28名工人生产某种螺栓和螺母,每人每天能生产螺栓12个或螺母18个,为了合理分配劳动力,使生产的螺栓和螺母配套(一个螺栓套两个螺母),则应分配多少人生产螺栓,多少人生产螺母?20.(百分数的应用)甲、乙、丙三杯糖水的浓度分别为40%,48%,60%,将三杯糖水混合后浓度变为50%,如果乙、丙两杯糖水质量一样,都比甲杯糖水多30克,那么三杯糖水共有多少克?21.某商店面包的成本是定价的80%,可乐的定价是10元,成本是8元.现在商店把2个面包与1杯可乐配套出售,并且按它们的定价之和的90%出售.这样每套可获得利润3元.面包的成本是多少元?22.(盈亏问题)小明从家到学校上课,开始时每分钟走50米,走了2分钟,根据以往经验,按照这个速度走下去,将要迟到2分钟,于是他立即加快速度,每分钟多走10米,结果小明早到了5分钟,小明家到学校的路程有多远?23.(经济问题)春节期间,某商店按下面两种方式促销,第一种方式:减价20元后再打八折;第二种方式:打八折再减20元.刘老师到商店买了两件不同的商品,其中一件按第一种方式促销,另一件按第二种方式促销,共花了252元.已知两件商品的原价都大于100元,而且其中一件商品的原价是另一件的整数倍(倍数大于1),那么这两件商品的原价分别是多少元?。

四川省成都市实验外国语学校2020—2021学年九年级下学期一诊考试英语试卷(含答案)

四川省成都市实验外国语学校2020—2021学年九年级下学期一诊考试英语试卷(含答案)

成都市实验外国语学校2020—2021年学年度下期一诊考试九年级英语试题考试时间120分钟满分150分A卷(共100分)第一部分听力测试(共35分)Ⅰ.Listen to the sentences carefully and choose the right picture for each sentence.Each sentence will be read only once.(4scores)A. B. C. D.1._________2.__________3.___________4.____________II.Listen to the sentences carefully and choose the correct responses.Each sentence will be read only once.(5scores)5.A.Yes,he is. B.Yes,it is. C.Yes,I am.6.A.My pleasure. B.That’s right. C.Sounds greatl17.A.Yes,that’s true. B.Sorry to hear that. C.How careless you are.8.A.I think so. B.Me too. C.See you9.A Well done. B.Thanks a lot C.Not good enoughIII.Listen to the short dialogues carefully and choose the best answer to each question.Each dialogue will be read twice.(6scores)10.What’s the price of the day flight?A.$360B.$400C.$45011.What is the probable relationship between the speakers?A.Schoolmates.B.Boss and employee.C.Salesman and customer.12.What are the speakers talking about?A.An office.B.A shopping center.C.A house.13.How often does Susan go to the gym?A.Every day.B.Twice a week.C.Four times a week.14.What does the singer’s hair look like?A.Long and dark.B.Short and blondeC.Short and dark15.What will the speakers do first?A.Have brunch.B.Check out.C.Go to the airport.IV.Listen to the long dialogue carefully and judge the following statements true or false.If it’s true,please choose“A”;if it’s false,please choose“B”.The dialogue will be read twice.(5scores)16.The man’s grandson will meet him at the airport.17.The man has been to Berlin,Paris and London.18.The man first went to Europe during World WarⅠ.19.The man will spend two weeks in London with his wife and grandson.20.The conversation probably happens in a restaurant.V.Listen to two short passages carefully and choose the best answer to each question.Each passage will be read twice.(10scores).21.What does Peter probably do?A.A famous painter.B.An art expertC.A museum worker.22.When did Peter find the painting?A.Before the museum was open.B.After the museum was closed.C.During his visit to the museum.23.Why did the director decide to hang the painting up in the museum?A.The painting was beautifully designed by Peter.B.Quite a few experts thought highly of the painting.C.The director thought the painting was of great art value.24.Why did the boy cry in front of the painting?A.Because he found his painting was not good enough.B.Because he wanted to have his painting back.C.Because he was not satisfied with his painting.25.How did the director feel after he heard the truth?A.Mad.B.Proud.C.Shocked.B26.Who designed the White House?A.George Washington.B.John Adams.C.James Hoban.27.Which president first moved into the White House?A.The first.B.The second.C.The third.28.When was the White House rebuilt?A.In1790.B.On Nov.1st1800.C.After the War of1812.29.Which of the following statement is Correct?A.The White House caught fire by accident in1812.B.Visitors aren’t allowed to visit any public places in the White House.C.It was in1792that people began to build the White House.30.What does the speaker mainly talk about?A.The history of the White HouseB.Some American presidents.C.The rebuilding of the White House.VI.Listen to the passage carefully and complete the chart with no more than THREE.words for each blank.The passage will be read three times.(5scores)Teenagers and part-time jobs in the UK31The children find job to make some pocket money.and learn life experience.Advantages Teenagers learn to be independent,32and know how to manage the money.Doing part-time jobs helps with job hunting in the future.Recent situation_______teenagers in the UK take part-time jobs compared with five years ago.Experts’findings Teenagers feel more stressed to study hard.Doing part-time jobs may34.Conclusion It’s necessary to35between study and part-time jobs.第二部分笔试(共65分)I.Choose the best answers to fill in the blanks.(10scores)36.There will be_______exhibition of the landscape paintings next week.A.aB.anC.the37.—Do you want coffee or tea,Madam?—______.I don’t really mind.A.NeitherB.EitherC.None38.—I think everyone should play a part in saving our environment.—I agree.There will be less air pollution_____we drive less.A.ifB.thoughC.unless39.Wolf Warriors is a fantastic movie_______almost every Chinese loves.A.whoB.thatC.what40.—Whose trumpet is this?Is it Sam’s?—It_______be his.Don’t you remember he didn’t come to the studio today?A.can’tB.mightC.mustn’t41.The lady______behind me is my aunt.She’s a college professor.A.sittingB.to sitC.sat42.Anthony________in a big storm when the boat engine suddenly broke down.A.sailedB.was sailingC.has been sailing43.Don’t forget_______the lights when they are not in use!A.to turn offB.turning onC.turning off44.During the Spring Festival,paper cuttings______on doors,windows and walls.A.are putting upB.put upC.are put up45.—Sir,could you please tell me______?—Sure.There is one on Tong Xin Road and it opens for24hours per day.A.where is the nearest caféB.when the nearest caféopensC.if there is a cafénearbyplete the dialogue and fill In the blanks with the sentences given in the box.(5scores) A:Good morning,doctor!B:Good morning,lady!46A:I am not feeling well.I have a sore throat and cough a lot these days.B:47A:Yes,of course.But I don’t have a fever.B:How long have you been like this?A:48B:Don’t worry.Many people have the same situation as you because of the cold weather.A:I see.49B:Drink more water and try to stay in bed for a couple of days,then you’ll get better soon.A:50Thank you.B:You are welcome.A.So what should I do?B.Ever since last Friday.C.OK,I will.D.What’s the matter with you?E.Have you taken your temperature?Ⅲ.Cloze test.Fill in the blanks with the best choices to complete the passages.(20scores)AHaving a positive attitude towards life is extremely important in all aspects,especially in an interview.Most people do poorly at interviews because they don’t have a positive attitude.In other words,they are51and forget all of their strengths and achievements.Don’t be shy!Tell the world about the good things you have done.Here are some things to encourage you and improve your performance in life.Always keep52with people you are talking to.Looking into someone’s eyes is helpful to show your ideas.Besides,your smile will cheer up everyone.Always look on the bright side of life.Point out advantages of everything and everyone. Every person has shining points,find them!Be53to learn something new every day.Be generous to54something interesting with your partner every day.Always say more than“yes or no”55you are asked.As long as you know the above tips,your life will be filled with active responses.51.A.excited B.nervous C.strange52.A.personal distance B.physical signal C.eye contact53.A.glad B.scared C.mad54.A.play B.work C.share55.A.how B.when C.whatBThere are purple clothes,purple handbags,purple bicycles,purple furniture,even purple computers!So purple is one of the most56colors today.But in the past,purple was a very expensive and unusual color.Let’s take a look at the rich history of the color purple.Some scientists believe that the first plants to appear on Earth over500million years ago probably looked purple,not green.Plants today are green because57use green chlorophyll(叶绿素)to produce energy.But these early plants probably used something called retinal,which is a dark purple color.During the time of the Roman Empire(37BC-476AD),it was very58to make purple dye. The dye came from sea snails(海螺).But10,000dead sea snails59you just one gram of purple dye...as well as a very bad smell!This special purple dye was called Tyrian purple,and it was the preferred color of emperors.In16th-century.England,purple was60for the king’s family members.Queen Elizabeth I’s clothes were purple,but ordinary people were not allowed to61the color.In.1856,William Perkin,an18-year-old62student,noticed something strange while doing an experiment.The chemicals he used to clean his instruments63with the:chemicals he used in his experiment and produced a bright purple color.The64led Perkin to start a company using this chemical mixture to make purple dye.The dye was much65than sea snail dye.Thanks to Perkin, now anyone can afford to wear purple clothes.56.A.peaceful B.popular C.exciting57.A.others B.they C.we58.A.dangerous mon C.difficult59.A.got B.wasted C.cost60.A.even B:never C.only61.A.wear B.make C.change62.A.geography B.science C.artpared B.mixed C.connected54.A.experiment B.chemicals C.discovery65.A.darker B.more expensive C:cheapeIV.Reading comprehension.Read the passages and choose the best answers.(30scores)AToothpaste does more than just keep our teeth bright and white.It can be used wisely in many other ways.Here are some useful tips that can save us time and money,and leave a fresh smell——using toothpaste!Clean a Dirty MirrorIf you want to clean a dirty bathroom mirror,try to put a bit of toothpaste on the mirror and wipe it dry.The glass can be cleaned up beautifully.And doing this can also stop the mirror from fogging.Then you can still see yourself in the mirror after taking a shower.Remove the Unpleasant Food SmellHave some bad food smell,like the smell of onions or fish,on your hands?You can remove it by washing your hands with toothpaste,You’ll be fresh-smelling in no time.Make Your Sports Shoes WhiterThis time,clean your sports shoes by yourself,not by your mother.Wipe some toothpaste around your shoes and then clean it with a wet cloth.See?Your shoes are white as new!A little toothpaste also does an amazing job of removing scuffs(磨痕)from leather shoes.Just put a little on the scuffed area and clean with a soft cloth.The leather will look new again.Make the Metal ShiningRings will get not so bright or shiny over time,yet with a little bit of toothpaste and a good washing,they’ll be shining away right away.But do not use this method on pearls(珍珠),as it will hurt the surface.66.The passage is written to introduce________.A.how to use the toothpaste in other waysB.where to buy cheaper toothpasteC.what we need to make the toothpaste67.With the help of the toothpaste,the mirror will be________.A.foggyB.clearC.fresh-smelling68.We can use the toothpaste to deal with_________.A.holes in sports shoesB.scuffs on leather shoesC.the dull pearls69.The underlined word“surface”means________.A.表层B.内部C.质地70.In which column(栏目)of the newspaper can the passage found?A.Entertainment.B.Culture.C.Life.BMaking friends with ducksIn traditional pet stores,you can buy an animal to be your companion at home.But there’s a new kind of“pet store”where you can spend some time with animals and just walk away without taking any of them with you.What really matters is to be there.My colleagues and I visited one of these stores in the Sanlitun neighborhood of Beijing.We were looking for Call ducks(柯尔鸭),a Dutch species of pet ducks.They are famous for their cute looks and their sky—high prices—one of them can easily cost a few thousand yuan.Since we were not planning to spend so much on a duck any time soon,visiting them in one of these places —what I’d call“mini-zoos”—seemed to be the perfect choice.There were five Call ducks at the store and we spent a good three hours with them.We learned a lot about the species.Call ducks are not as obedient enough to follow what they are told to do as dogs,so playing with them takes lot of running from our side and quacking(呱呱叫)from theirs.Also,don’t expect them to be house-trained—one of the ducks actually pooped(排便)sitting on my leg.But none of this took the pleasure out of holding them in my hands and touching their full chests.That’s the magic of animals—you are refreshed again.71.According to the passage,the new kind of pet stores________.A.sell Call ducks at a very high priceB.provide the service of experiencingC.teach rich knowledge about animals72.The underlined word obedient is closest in meaning to__________.A.strongB.gentleC.honest73.It’s clear that Call ducks________.A.are better companions than dogsB.like running after people aroundC.are difficult to be house-trained74.The writer wants to tell us_________.A.the trip to mini-zoos is very refreshingB.spending time with animals is fashionableC.keeping pets at sky-high prices is unnecessary75.What would be another title for this passage?A.To Touch Is MagicB.To Be There Is EnoughC.To Visit Is CheapCThere are quite a few advantages of wearing school uniforms.The idea may seem disagreeable at first,but considering all the positive effects coming from wearing uniforms you would be more likely to enjoy them.Teachers love school uniforms because it helps provide an orderly learning environment. Having students dressed in uniforms may teach them how to present themselves in a neat and professional manner.It gives students the opportunity to learn how to dress like young ladies and gentlemen.And they can focus their attention on studies rather than fashion.Buying school uniforms is easy.No matter what the school rules are,there are only several pieces to the wardrobe that are necessary,so it won’t break the bank.School uniforms can last a long time.Parents could also enjoy an easy morning,as it will take less time to choose a set of clothes for the school day.Students wearing uniforms will feel less pressure about what to wear or not to wear when their classmates are dressed similarly.Getting dressed before school becomes less of a chore whenstudents are limited in their choices,so there shouldn’t be any trouble about choosing an outfit for the day and getting ready quickly.Some students may not like the lack of individuality with uniform,but it doesn’t matter so much.Right?Uniforms today are also becoming more fashionable and can be seen in many areas of pop culture.Celebrities and fashion designers are using uniforms as inspiration for new looks which also attract students.76.What would be the best title for the text?A.How to Dress Properly.B.The History of School Uniforms.C.The Advantages of School Uniforms.77.Teachers think that wearing school uniforms_________.A.is just a tradition that students should followB.helps students put more effort into their studiesC.makes students feel less pressure in study78.The underlined part“It won’t break the bank”in Paragraph3probably means“_________.”A.a school uniform doesn’t cost a lot of moneyB.a school uniform should be worn every dayC.parents who work in a bank can afford the uniform79.We can infer from the text that school uniforms_________.A.are not popular with fashion designersB.were not accepted by parents in the pastC.will be more popular in the future80.The author’s attitude towards school uniforms is__________.A.supportiveB.negativeC.doubtfulB卷(共50分)Ⅰ.Pattern shift.Rewrite the following sentences according to the instructions.(5scores)1.I enjoy reading science fiction.My wife enjoys reading science fiction too.I enjoy reading science fiction.__________________my wife.2.The terrible earthquake has made thousands of people homeless.(Change it into the passive voice.)3.“Don’t leave the office without permission,”the teacher said to the students.(Change it into the indirect speech.)4.The old couple who live next door got married fifty years ago.(Change it into the present perfect tense.)5.Our teachers have given us lots of helpful suggestions in the past three years.(Change it into an exclamatory sentence.)plete the dialogue and fill in each blank with only one word.(10scores)W:Hi,Bezos.Did you have a good time yesterday?M:Hey,Marta.Forget about it.W:What was the matter?You didn’t enjoy the film?M:Oh,the movie was fine.I just got6by the couple sitting beside me.W:What happened?M:Well,first they came in7.They spent a while getting into the8.All this was happening during an exciting part of the film.And then they started talking.W:Oh,I hate it.M:The man had seen the.film before.He was telling the woman the9story.W:What?Unbelievable!M:Yeah,the beginning,development even the ending and you won’t believe what happened10!A young man asked them to be quiet.11,of course.W:Wow,he still has very good manners in such a situation.So they12in reply.Right?M:No way.You can’t imagine the three got into an13several minutes later!Their voices were so loud that everyone around them started14.W:Well,what finally happened?M:The manager of the cinema had to be called in.Everyone quieted down eventually,but it was too late.They damaged my mood for the movie.W:What a pity!The couple must be15of their behavior.III.Choose10from the12words in the box to complete the passage with their proper forms.Each word can be used only once.(10scores)accept bad comfortable frightening fast imagine loud I not pass place strongAs a child,I was really afraid of the dark and of getting lost.These fears were very real and caused me some16moments.Maybe.it was the.strange way things looked and sounded in my own room at night that17 me so much.There was never complete darkness,but always a streetlight or18car lights,which made clothes on the back of a chair take on the shape of a wild animal.Out of the corner of.my eye,I saw the curtains seem to move when there was19wind.A very low sound in the floor would seem a hundred times20than in the day.My21would run wild,and my heart would beat 22.I would lie very still so that the“enemy”would not discover me.Another of my childhood fears was that I would get lost,especially on the way home from school.Every morning I got on the school bus right near my home.That was no problem.After school,though,when all the buses were lined up along the street,I was afraid that I would get in the wrong one and be taken to some other strange23.On school or family trips to a park or a museum,I wouldn’t let the leaders out of my sight.Perhaps one of24fears of all I had as child was that of not25or liked by others.One of the processes growing up is being able to realize and overcome our fears. Understanding the things that scared us as children helps us achieve greater success later in life. plete the passage and fill in the blanks with the sentences given in the box.Each can be used only once.(5scores)Taking exercise regularly can improve your health.It leads to much better use of vitamins, minerals as well as oxygen in your body.26,you may miss some periods of exercise in the end.If exercise is so good for your health,what happens when you miss a few parts?You should balance the amount of exercise and the amount of time allowed for recovery from exercise.Quality must always come before quantity(量).Shortly after you stop normal exercise, obvious changes begin to happen in your body based upon your level of fitness.27.Once you stop exercising,the amount of oxygen you breathe into your body is influenced.28.And there is a decrease in your strength.Other important factors of physical fitness are also influenced.So what can you do with these changes?29.If you are injured or sick,talk with your doctor to find out what kind of exercise you can safely perform.30,it is high time you started your practice of exercising regularly.There are many choices of exercise for you to choose from.Just choose one that matches your personal interest.Great interest can help you stick to your exercise schedule.A.Since regular exercise is good for your healthB.This change will do harm to the balance in your bodyC.Sometimes,although you’ve made efforts to exerciseD.You should get back to your regular exercise scheduleE.Even though you’ve kept the same level of physical activityF.The lack of exercise influences how you look,feel and represent yourselfV.Task-based reading.Finish each task according to the requirement.(5scores) Have you ever heard someone use the phrase“once in a blue moon”?People use this expression to describe something that they do not do very often.For example,someone might say that he tries to avoid eating sweets because they are unhealthy,but will eat chocolate“once in a blue moon”.Or someone who does not usually like to go to the beach might say“I visit the shore once in a blue moon”.While many people use this phrase,not everyone knows the meaning behind it.The first thing to know is that the moon itself is never really blue.This is just an expression. In fact,the phrase“blue moon”has to do with the_______,not the________.As the moon travels around the earth,it appears to change shape.We connect certain names with certain shapes of the moon.For example,when we can see a small part of the moon it is called a crescent moon.A crescent is a shape that looks like the tip of fingernail.When we cannot see the moon at all,it is called a new moon.When we can see the whole moon,it is called a full ually,there is only one full moon every month.However,sometimes there will be two full moons in one month.When this happens,the second full moon is called“a blue moon”.Over the next20years,there will only be15blue moons.As you can see,a blue moon is a very rare event.This fact has led people to use the expression“once in a blue moon”to describe other very rare events in their lives.31.The phrase“once in a blue moon”is used to describe something that________happens.(only one word)32.A blue moon happens in nature when_______________________.(no more than8words)33.Find out a letter in the alphabet which has a crescent shape.9plete the sentence in the second paragraph.35.The underlined part“This fact”in the last paragraph refers to_____________________.(no more than8words)position.(15scores)The Chengdu2021World University Games Summer will be put off to2022because of the global COVID-19situation.We have more time to prepare for it.It is reported that more than 10,000athletes from about170countries and regions will battle it out.Please write an article with the theme---Love Chengdu.Welcome the Universiade2022.The following points should be included.(Write90—120words)1.A short introduction of Chengdu.(location,speciality...)2.The advantage the event brings to our city.3.What can the citizens do to welcome the big event?(At least2points)4.Would you like to do some volunteer work?And the reasons.成都市实验外国语学校2020—2021年学年度下期一诊考试参考答案A卷I.1-4DACBII.5-9BCABBIII.10-15BBCBBAIV.16-20ABBBBV.21-25CBCBC26-30CBCCAⅥ.31.Parent’s expectations32.work with adults33.fewer34.influence teenagers’study35.keep balance笔试I.36-45BBABA ABACCII.46-50DEBACIII.51-55BCACB56-65BBCAC ABBCC IV.66-70ABBAC71-75BBCAB 76-80CBACAB卷I.te8.seats9.hole10.then11.politely12.stopped13.argumentplaining15.ashamedIII.16.uncountable17.frightened18.passing19.no20.louder 21.imagination22.fast23.places24.the worst25.been acceptedIV.26-30CFBDA20V.31.hardly32.there are two full moon in one month33.C34.shape color35.a blue moon is very rare event.。

四川省成都市外国语学校2022-2023学年九年级上学期期中数学考试

四川省成都市外国语学校2022-2023学年九年级上学期期中数学考试

成都外国语学校2022-2023学年度上期期中考试初三数学试卷A卷一.选择题(本大题共8个小题,每小题4分,共32分)1.如图所示的几何体的左视图是()2.下列说法正确的是()A.对角线互相垂直的四边形是菱形B.矩形的对角线互相垂直C.对角线相等的菱形是正方形D.一组对边平行的四边形是平行四边形3.已知两个相似三角形的相似比为1:4,则它们的对应高的比为()A.1:2B.1:4C.1:8D.1:164.要估计鱼塘中的鱼数,养鱼者首先从鱼塘中打捞了50条鱼,在每条鱼身上做好记号后把这些鱼放归鱼塘,再从鱼塘中打捞出200条鱼,发现只有两条鱼是刚才做了记号的鱼,假设鱼在鱼塘内均匀分布,那么估计这个鱼塘的鱼数约为()A.1750条B.1250条C.5000条D.2500条5.关于x的一元二次方程kx2+2x﹣1=0有两个不相等的实数根,则k的取值范围是()A.k>﹣1B.k>﹣1且k≠0C.k<1D.k<1且k≠06.对于函数y=,下列说法错误的是()A.点(,6)在这个函数图象上B.这个函数的图象位于第一、三象限C.这个函数的图象既是轴对称轴图形又是中心对称图形D.当x>0时,y随x的增大而增大7.有一根1m长的铁丝,怎样用它围成一个面积为0.06m2的长方形?设长方形的长为xm,依题意,下列方程正确的是()A.x(1﹣x)=0.06B.x(1﹣2x)=0.06C .x (0.5﹣x )=0.06D .2x (1﹣2x )=0.06 8.已知菱形的周长为4,两条对角线的和为6,则菱形的面积为( ) A .2 B . C .3 D .4二.填空题本(大题共5个小题,每小题4分,共20分)9.已知函数y =(m +3)x |m |﹣4是反比例函数,则m = .10.如图,在Rt △ABC 中,CD 是斜边AB 上的中线,∠A =20度,则∠BCD = 度.11.如果a +b +c =0,那么一元二次方程ax 2+bx +c =0必有一个根是 .12.把12cm 长的线段进行黄金分割后得两条线段,其中较长的线段的长为 cm .13.如图,小明在B 时测得直立于地面的某树的影长为12米,A 时又测得该树的影长为3米,若两次日照的光线互相垂直,则树的高度为 米.三.解答题(本大题共5个小题,共48分)14.(12分)(1)计算:01-23-2821-2)()()(++ (2)计算:5422-=-x x x15.(8分)为了丰富校园文化生活,提高学生的综合素质,促进中学生全面发展,学校开展了多种社团活动.小明喜欢的社团有:合唱社团、足球社团、书法社团、科技社团(分别用字母A ,B ,C ,D 依次表示这四个社团),并把这四个字母分别写在四张完全相同的不透明的卡片的正面上,然后将这四张卡片背面朝上洗匀后放在桌面上.(1)小明从中随机抽取一张卡片是足球社团B 的概率是多少?(2)小明先从中随机抽取一张卡片,记录下卡片上的字母后不放回,再从剩余的卡片中随机抽取一张卡片,记录下卡片上的字母.请你用列表法或画树状图法求出小明两次抽取的卡片中有一张是科技社团D 的概率.16.(8分)如图,在矩形ABCD 中,AB =3,AD =6,动点E 在边BC 上,连接DE ,过点A 作AH ⊥DE ,垂足为H,AH交CD于F.(1)求证:△CDE∽△DAF;(2)当FC=2时,求EC的长.17.(10分)如图,在平面直角坐标系中,把以格点为顶点的三角形称为格点三角形(每个小方格都是边长为1的正方形).图中△ABC是格点三角形,点A、B、C的坐标分别是(﹣3,﹣1),(﹣2,﹣3),(0,﹣2).(1)画出△ABC关于x轴对称的△A1B1C1;(2)以O为位似中心,在第一象限内将△ABC放大为原来的2倍,得到△A2B2C2,画出△A2B2C2;(3)△ABC内有一点P(a,b),直接写出经过(2)位似变换后P的对应点P1的坐标.18.(10分)如图,在平面直角坐标系中,一次函数y1=x﹣2的图象与反比例函数(k≠0)的图象交于A(﹣2,a)、B(m,2)两点,与y轴交于点C,与x轴交于点D,连接OA、OB.(1)求反比例函数(k≠0)的表达式;(2)求△AOB的面积;(3)点N为坐标轴上一点,点M为y2的图象上一点,当以点C、D、M、N为顶点的四边形是平行四边形时,请直接写出所有满足条件的N点的坐标.B卷一、填空题(本大题共5个小题,每小题4分,共20分)19.设m、n分别为方程x2+2x﹣2025=0的两个实数根,则m2+3m+n=.20.完全相同的四张卡片上分别印有正三角形、正方形、正五边形和正六边形,现将印有图形的一面朝下,混合均匀后先由甲随机抽取一张,放回后,重新混合均匀再由乙随机抽取一张,则甲乙两人抽到的图形都是中心对称图形的概率为 .21.若以方程x 2﹣2(k ﹣3)x +k 2﹣4k ﹣1=0的两个实数根作为横坐标、纵坐标的点恰在反比例函数y =的图象上,则满足条件的k 值为 .22.如图,点P 是等边△ABC 的一边BC 上的任意一点,且BP CP 3 ,连接AP ,作AP 的垂直平分线交AB 、AC 于M 、N 两点,则AN AM :的值为 .23.如图,在边长为4正方形ABCD 中,以AB 为腰向正方形内部作等腰△ABE ,点G 在CD 上,且CG =3DG .连接BG 并延长,与AE 交于点F ,与AD 延长线交于点H .连接DE 交BH 于点K .若AE 2=BF •BH ,则S △CDE = .二、解答题(本大题共3个小题,共30分)24.(8分)由于新冠疫情的影响,口罩需求量急剧上升,经过连续两次价格的上调,口罩的价格由每包10元涨到了每包16.9元.(1)求出这两次价格上调的平均增长率;(2)在有关部门大力调控下,口罩价格还是降到了每包10元,而且调查发现,定价为每包10元时,一天可以卖出30包,每降价1元,可以多卖出5包.当销售额为315元时,且让顾客获得更大的优惠,应该降价多少元?25.(10分)问题背景 如图(1),已知△ABC ∽△ADE ,求证:△ABD ∽△ACE ;尝试应用 如图(2),在△ABC 和△ADE 中,∠BAC =∠DAE =90°,∠ABC =∠ADE =30°,AC 与DE相交于点F,点D在BC边上,=,求的值;拓展创新如图(3),D是△ABC内一点,∠BAD=∠CBD=30°,∠BDC=90°,AB=4,AC=2,直接写出AD的长.26.(12分)如图1,在平面直角坐标系xOy中,点A(﹣1,0),B(4,0),点C在y轴的负半轴上,连接AC,BC,满足∠ACO=∠CBO.(1)求直线BC 的解析式;(2)如图2,已知直线l 1:623-=x y 经过点B . ①若点D 为直线l 1上一点,直线AD 与直线BC 交于点H ,若32=∆∆ABH BDH S S ,求点D 的坐标; ②过点O 作直线l 2∥BC ,若点M 、N 分别是直线l 1和l 2上的点,且满足∠ABC =∠MNB .请问是否存在这样的点M 、N ,使得△ABC 与△MBN 相似?若存在,请直接写出点N 的坐标;若不存在,请说明理由.。

成都实验外国语学校2021~2022学年高一一阶考试数学试题及参考答案

成都实验外国语学校2021~2022学年高一一阶考试数学试题及参考答案

成都市实验外国语2021~2022学年上期第一次阶段性考试高 一 数 学本试卷分为选择题和非选择题两部分。

满分150分,考试时间120分钟。

注意事项:1. 答题前,务必将自己的姓名、考籍号填写在答题卡规定的位置上。

2. 答选择题时,必须使用2B 铅笔将答题卡上对应题目的答案标号涂黑,如需改动,用橡皮擦擦干净后,再选涂其它答案标号。

3. 答非选择题时,必须使用0.5毫米黑色签字笔,将答案书写在答题卡规定的位置上4. 所有题目必须在答题卡上作答,在试题卷上答题无效。

5. 考试结束后,只将答题卡交回。

第Ⅰ卷(选择题,共60分)一、选择题(每小题只有一个正确答案,每小题5分,共60分)(2021 成都实外一阶考试 1)已知集合M 中的元素,,a b c 是ABC ∆的三边,则ABC ∆一定不是( )A. 锐角三角形B. 钝角三角形C. 直角三角形D. 等腰三角形 【答案】D(2021 成都实外一阶考试 2)已知集合(){}(){},|2,,|4M x y x y N x y x y =+==-=,那么集合MN 为( )A. 3,1x y ==-B. (){}3,1-C. {}3,1-D. ()3,1-【答案】B(2021 成都实外一阶考试 3)已知{}{}2|1,|1M y y x P y y x ==-==-,则集合M 与P 的关系是( )A. M P =B. P R ∈C. M P ⊂≠D. P M ⊂≠ 【答案】A(2021 成都实外一阶考试 4)已知{}2|24,|11A x Z x B x x ⎧⎫=∈-<<=>⎨⎬-⎩⎭,则()RA B 的元素个数为( )A. 1B. 2C. 3D. 4【答案】D(2021 成都实外一阶考试 5)下列各组函数中,是同一函数的是( )①21,y x y =+=2,1x xy y x x-==-;③22321,312y x x u v v =++=++;④11,111x y y x x x -==++- A. ①②③ B. ①②③ C. ②④ D. ③ 【答案】D(2021 成都实外一阶考试 6)若函数()2212f x x x +=-,则()3f =( )A. 3B. 1-C. 0D. 4 【答案】B(2021 成都实外一阶考试 7)已知函数()f x 的定义域为(),2-∞,则函数()f x 的定义域为( )A. [)1,2-B. []1,1-C. ()2,2-D. [)2,2- 【答案】C(2021 成都实外一阶考试 8)函数42xy x-=+的值域是( ) A. R B. 11,,22⎛⎫⎛⎫-∞--+∞ ⎪ ⎪⎝⎭⎝⎭C. ()(),22,-∞--+∞D. ()(),11,-∞--+∞【答案】D(2021 成都实外一阶考试 9)水滴进玻璃容器,如图所示(设单位时间内进水量相同),那么水的高度是如何随时间变化的?下列匹配的图像与容器符合实际的有( )A. I----(2)B. II----(4)C. III----(3)D. V----(1) 【答案】A(2021 成都实外一阶考试 10)若函数()f x =在[)2,+∞上是减函数,则实数a的取值范围是( )A. (],4-∞B. (]4,4- C. [)4,4- D. (),4-∞【答案】B(2021 成都实外一阶考试 11)对于任意两个数()*,,x y x y N ∈,定义某种运算“*”如下:①当()*,,x y x y N ∈同为奇数或同为偶数时,*x y x y =+;②当()*,,x y x y N ∈一奇一偶时,*x y xy =,则集合(){},|*10A x y x y ==的子集个数是( )个 A. 142 B. 132 C. 112 D. 72 【答案】B(2021 成都实外一阶考试 12)函数()f x 对任意的实数,x y 都满足()()()222f x y f x f y +=+⎡⎤⎣⎦,()10f ≠,则()2021f 的值为( )A.20212B. 2021C. 12 D. 1【答案】A第II 卷(非选择题,共90分)二.填空题(每小题5分,共20分)(2021 成都实外一阶考试 13)用列举法表示集合{}*|,4________.x x N x ∈<= 【答案】{}1,2,3(2021 成都实外一阶考试 14)设函数()231f x x =-,则()()_______.f a f a --=【答案】0(2021 成都实外一阶考试 15)已知函数()10y a a x x=>+的图像如图所示,则实数a 的取值范围是_________.【答案】()1,+∞(2021 成都实外一阶考试 16)已知函数()()24,11f x x ax g x x x =-++=++-,若不等式()()f x g x ≥的解集包含[]1,1-,则实数a 点的取值范围是_______.x【答案】[]1,1-三.解答题(写出必要的证明、解答过程,共70分) (2021 成都实外一阶考试 17) (1)计算:10.532072720.139125π--⎛⎫⎛⎫+-- ⎪⎪⎝⎭⎝⎭;(2)已知11223a a-+=,求22a a -+的值.【答案】(1)97;(2)47(2021 成都实外一阶考试 18)已知集合{}|37A x x =≤<,{}2|12200B x x x =-+<,{}|c x x a =<(1)(),RAB A B ;(2)若A C ≠∅,求a 的取值范围. 【答案】(1)()2,10AB =,()()[)2,37,10R A B =;(2)()2,+∞(2021 成都实外一阶考试 19)记函数()f x =定义域为集合A ,()g x =定义域为集合B(1)求集合A ;(2)若A B ⊆,求a 的取值范围. 【答案】(1)[)3,4;(2)[)4,+∞(2021 成都实外一阶考试 20)新学期开学季,成都某学校附近又新开了一家奶茶店,其中有一种名为“奶茶三兄弟”的饮品很受学生欢迎,老板费尽心思想在这种饮品上赚得第一桶金,其销售的价格在一学期不同周次有所变化. 设开始时每杯定价10元,从第一次周开始每周涨价2元,5周后开始保持20元的价格平稳销售,10周后,学生的新鲜感已过,平均每周削价2元,直到16周周末,老板为了让学生安心准备期末考试复习而不挂念“三兄弟”,该饮品暂停销售.(1)试求该饮品每杯价格p (元)与周次[](),1,16,t t t N ∈∈之间的函数关系式; (2)若此饮品每杯成本价q (元)与周次t 之间的关系是()[]21812,1,168q t t =--+∈,t N ∈,试问该饮品第几周每杯的销售利润最大,并求出最大值.【答案】(1)102,1520,510202,1016t t p t t t +≤≤⎧⎪=<≤⎨⎪-<≤⎩;(2)第五周,最大利润为73/8(2021 成都实外一阶考试 21)定义在()()1,00,1-上的函数()221f x x x=- (1)判断函数()f x 的奇偶性并证明; (2)解关于x 的不等式()()3151f x f x +>+.【答案】(1)偶函数,证明略;(2)2111,,5334⎛⎫⎛⎫---- ⎪ ⎪⎝⎭⎝⎭【解析】(2)031511x x <+<+<(2021 成都实外一阶考试 22)已知二次函数()f x 满足()()121f x f x x +-=+,()()f x f x -=,()01f =-(1)求()f x 的解析式;(2)求()f x 在[],2a a +上的最小值; (3)若对于任意3,2x ⎡⎫∈+∞⎪⎢⎣⎭,()()()2414x fm f x f x f m m ⎛⎫-≤-+ ⎪⎝⎭恒成立,求实数m 的取值范围.【答案】(1)()21f x x =-;(2)()2min243,21,201,0a a a f x a aa ⎧++≤-⎪=--<<⎨⎪-≥⎩;(3)3,,2⎛⎡⎫-∞-+∞ ⎪⎢ ⎪⎝⎦⎣⎭。

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成都市实验外国语学校2021学年上期第二次阶段考试
高2019级数学学科试题
注意事项:
本试卷分第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)两部分。

考生作答时,须将答案全部作答在答题卡上,在本试卷、草稿纸上答题无效。

第Ⅰ卷(选择题) 一、单选题
1.已知命题p :0∀>x ,总有()121+>x
x ,则命题p 的否定为( )
A .00∃≤x ,使得()00121+≤x x
B .00∃>x ,使得()00121+≤x
x
C .0∀>x ,总有()121+≤x x
D .0∀≤x ,总有()121+≤x
x
2.某工厂为了对40个零件进行抽样调查,将其编号为00,01,…,38,39.现要从中选出5个,利用下面的随机数表,从第一行第3列开始,由左至右依次读取,则选出来的第3个零件编号是( ) 0347 4373 3686 9636 6233 6011 1410 2616 6147 4698 6371 8045 9577 7424 6762 4281 1457 2042 5332 3732 2707 3607 5124 5179 A .11
B .14
C .10
D .33
3.已知在最小二乘法原理下,具有相关关系的变量x ,y 之间的线性回归方程为ˆ0.710.3=-+y
x ,且变量x ,y 之间的相关数据如表所示,则下列说法正确的是( )
A .变量x ,y 之间呈现正相关关系
B .可以预测,当20=x 时,ˆ 3.7=y
C .可求得表中 4.7=m
D .由表格数据知,该回归直线必过点()9,4
4.方程=x ) A .圆的一部分
B .椭圆的一部分
C .双曲线的一部分
D .直线的一部分
5.若()2,1P 是圆()2
2125-+=x y 的弦AB 的中点,则直线AB 的方程是( ) A .30+-=x y B .10--=x y
C .30--=x y
D .10+-=x y
6.已知抛物线2
34
=
y x ,则它的焦点坐标为( )
A .30,
16⎛⎫
⎪⎝⎭
B .3,016⎛⎫
⎪⎝⎭
C .1,03⎛⎫ ⎪⎝⎭
D .10,3⎛⎫ ⎪⎝⎭
7.两圆2
2
230+-+=x y y 与22
20++=x y x 公共弦所在的直线方程是( )
A .2230--=x y
B .2230-+=x y
C .2230+-=x y
D .2230++=x y
8.右图是抛物线形拱桥,当水面在l 时,拱顶离水面2m ,水面宽4m ,若水面下降0.42m 后,则水面宽为( )
A .2.2m
B .4.4m
C .2.4m
D .4m
9.如图所示,1F ,2F 分别为椭圆22
221+=x y a b
的左右焦点,点P 在椭圆上,2OF P △角形,则2b 的值为( )
A
B .
C .
D .10.已知1F ,2F 分别为椭圆C :()22
2210+=>>x y a b a b
的左右焦点,P 是椭圆上一点,若122=PF PF ,
则椭圆离心率的取值范围为( ) A .10,2⎛
⎫ ⎪⎝⎭
B .11,
32⎛⎫
⎪⎝⎭
C .1,13⎡⎫⎪⎢⎣⎭
D .
1,12⎡⎫⎪⎢⎣⎭
11.已知圆C :()2
222-+=x y ,直线l :2=-y kx ,若直线l 上存在点P ,过点P 引圆的两条切线1l ,
2l ,使得12⊥l l ,则实数k 的取值范围为( )
A .(),0-∞
B .[)0,+∞
C .()
0,22⎡⋃+∞⎣
D .2⎡+⎣
12.已知双曲线C :()22
2210,0-=>>x y a b a b
右支上的一点P ,经过点P 的直线与双曲线C 的两条渐近
线分别相交于A ,B 两点.若点A ,B 分别位于第一,四象限,O 为坐标原点,当1
2
=AP PB 时,AOB △的面积为2b ,则双曲线C 的实轴长为( ) A .
329
B .
169
C .
89
D .
49
第Ⅱ卷(非选择题) 二、填空题
13.设集合{}01=<<A x x ,{}
03=<<B x x ,那么“∈m A ”是“∈m B ”的______条件(填“充分不必要”、“必要不充分”、“充要”或“既不充分又不必要”).
14.()()2
2
111+--=k x k y 表示焦点在x 轴上的双曲线,则k 的取值范围为______.
15.已知F 是抛物线C :2
8=y x 的焦点,M 是C 上一点,FM 的延长线交y 轴于点N .若M 为FN 的中点,则=FN ______.
16.已知直线l :0++=mx y m 交圆C :()2
211-+=x y 于()11,A x y ,()22,B x y 两不同点,
则114-+x y 224+-+x y 的取值范围为______.
三.解答题
17.设∈t R ,已知命题p :函数()2
1=-+f x x tx 有零点:命题q :[)1,∃∈+∞x ,4
≥+
t x x
.若∧p q 为真命题,求实数t 的取值范围.
18.已知数列{}n a 的各项均为正数,观察程序框图,若1=k ,2=k 时,分别有13=
S 和25
=S .
(1)试求数列{}n a 的通项公式;
(2)令3=+n
n n b a ,求数列{}n b 的前n 项和n T .
19.学校为了制定培养学生阅读习惯,指导学生提高阅读能力的方案,需了解全校学生的阅读情况,现随机调查了200名学生每周阅读时间X (单位:小时)并绘制如图所示的频率分布直方图.
(1)为查找影响学生阅读时间的因素,学校团委决定从每周阅读时间为[)6.5,7.5,[)7.5,8.5的学生中抽取6名参加座谈会,你认为6个名额应该怎么分配?
(2)利用样本估计总体的方法,估计全校每周阅读时间的中位数a (a 的值精确到0.01). 20.已知抛物线()2
20=>x py p 的焦点为F ,抛物线上的点A 到x 轴的距离为1-AF .
(1)求p 的值:
(2)已知点()2,0M ,若直线AF 交抛物线于另一个点B ,且⊥AM BM ,求直线AF 的方程. 21.平面内动点M 到点()2,0F 的距离与M 到直线92=x 的距离之比为2
3
. (1)求动点M 的轨迹C 的方程:
(2)过点F 的直线l 交轨迹C 于不同两点A 、B ,交y 轴于点N ,已知1=NA AF λ,2=NB BF λ,试问12+λλ是否等于定值,并说明理由.
22.已知椭圆C :()22
2210+=>>x y a b a b
的长轴长为6,C 上一点M 关于原点O 的对称点为N ,若
⊥MF NF ,设∠=MNF α,且π3sin 44⎛
⎫+= ⎪⎝
⎭α.
(1)求椭圆C 的标准方程:
(2)经过圆O :2
2
10+=x y 上一动点P 作椭圆C 的两条切线,切点分别记为A 、B ,求AOB △面积的取值范围.。

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