重点高中提前提前招生英语试卷
2021-2022全国重点高中提前招生模拟试卷-------上高二中版
2021-2021全国重点高中提前招生模拟试卷-------上高二中版一、选择题(每小题3分,只有一个正确答案,共24分)1.要使分式的取值范围是有意义,则x 4833-----x x x ( )12.≥x A 10,98,7,6,3x 12.,或=≥x B C.x ≥3且x ≠4,5,11 D.x ≥32.设由x 轴,直线x=8,直线y=x (0<x<5),直线y=2x-5(5≤x ≤8)所围成的图形面积为k ,则k=( )A.21.5B.36.4C.36.5D.443.如图,在矩形ABCD 中,AB=3,AD=4,点P 在AD 上,PE ⊥AC 于E ,PF ⊥BD 于F ,则PE+PF 等于( )A.1.4B.2.4C.2.6D.2.84.小明家住在18层的高楼上。
一天,他与妈妈去买竹竿。
如果电梯的长宽高分别是2米、2米、4米,那么能放入电梯的竹竿的最大长度大约是( ) A.42 B.22+2 C.210 D.265.如图,设P 是凸多边形ABCD 内一点,过P 分别做AB,BC,CD,DA 的垂线,垂足分别为E,F,G,H 。
已知AH=3,HD=4,CF=6,FB=4,且BE-AE=1,则四边形ABCD 的周长为( )A.29B.32C.34D.486.如图在任意五边形ABCDE 中,M,N,P,Q 分别为AB,CD,BC,DE 的中点,K,L 分别为MN ,PQ的中点,则下列说法(1)PNQM 为平行四边形;(2)KL ∥AE;(3)KL=1/4AE ;(4)BE ∥PQ 。
中正确的有( )个A.1B.2C.3D.47.如图,在矩形ABCD 中,AB=a ,BC=b ,M 是BC 的中点,DE ⊥AM ,E 为垂足,则DE=( )A.²²42b a ab +B.²²4b a ab +C.²4²2b a ab +D.²4²b a ab + 8.已知y=1-x +x -5(x ,y 均为实数),则y 的最大值与最小值的差为( ) A.22-2 B.224- C.223- D.122-二、填空题(每题3分,共27分)9.若21-=-x x ,则x ²-²1x 的值为_____.10.如图四个边长为1的小正方形构成一个大正方形,连接小正方形的三个顶点,可得到△ABC ,则△ABC 中BC 边上的高是_______.11.已知x-1=3,则代数式(x+1)²-4(x+1)+4的值为_______.12.如图是一辆快车和慢车行驶的时间t (小时)和路程s (公里)的函数图像,根据图像判断下列说法正确的有_______.(1)慢车比快车早出发2小时,但晚到4小时(2)慢车与快车的速度比为2:3(3)慢车在18小时内所走的路为828公里(4)慢车的速度为46公里/小时13.如图,直线OB 是一次函数y=2x 的图像,点A 的坐标为(0,2),在直线OB 上找点C ,使△ACO 为等腰三角形,则点C 坐标为_________________.14.如图,菱形ABCD 的边长为8cm ,∠A=60°,DE ⊥AB 于点E ,DF ⊥BC 于点F ,则四边形BEDF 的面积为______cm ².15.如图梯形ABCD 中,AB ∥DC ,M 是腰BC 的中点,MN ⊥AD ,若MN=6,AD=7,则梯形ABCD 的面积是______.16.如图∠A=40°,∠C=36°,BP 平分∠ABG ,DP 平分∠CDG ,则∠P 的大小为______.17.一组数据为:3,4,9,x ,它的平均数比他唯一的众数大1,则x 的值为______.三、分式与二次根式的化简求值(共两小题,每小题6分,计12分) 18.计算19911²1991²1990²19901-++19. 先化简,再求值:44²²)4²21(+++÷---a a a a a a ,其中2=a 四、简答与证明题。
全国重点高中提前招生考试真题卷英语
全国重点高中提前招生考试真题卷英语English:The National Key High School Early Admission Exam is designed to assess students' academic abilities, critical thinking skills, and potential for success in a rigorous high school curriculum. The exam covers a range of subjects including English, math, science, and social studies, testing students on their knowledge and understanding of key concepts. It also includes sections that evaluate students' problem-solving skills, analytical reasoning, and writing abilities, giving schools a comprehensive picture of each applicant's strengths and weaknesses. By participating in this exam, students demonstrate their readiness for the challenges of a top-tier high school education and compete for limited spots in prestigious institutions.中文翻译:全国重点高中提前招生考试旨在评估学生的学术能力、批判性思维能力以及在严格高中课程中取得成功的潜力。
江苏某重点高中提前招生语文试题
江苏某重点高中提前招生招生考试语文试题(满分:150分考试时间:120分钟)友情提醒:1.本试卷分三部分,共10 页。
2.请将自己的姓名和考号正确填写在答题纸规定的地方。
3.请将答案填写在答题纸对应的题号下,写在其他地方无效。
一、基础积累及运用(25分)1.根据拼音在括号里填写适当的汉字。
(3分)疏jùn() jùn()工 jùn()马2.给下列加点的汉字注音。
(3分)相形见绌.()笨拙.()咄.()咄逼人3.根据提示填充。
(6分)(1)在横线上填写诗文原句。
(3分)①,欲上青天揽明月。
(李白《宣州谢脁楼饯别校书叔云》)②不愤不启,不悱不发,,则不复也。
(《论语》)③江流有声,断岸千尺,山高月小,。
(苏轼《后赤壁赋》)(2)阅读名著《三国演义》片断,回答后面的问题。
(3分)赤面秉赤心、骑赤兔追风,驰驱时无忘赤帝;青灯观青史、仗青龙偃月,隐微处不愧青天。
①此联所赞颂的人物是。
(1分)②列举与该人物有关的两个故事。
(2分)4.下面说法较得体的一项是()(3分)A.好友邀你去他家,你说:“好吧,明天我一定光临。
”B.夜已经深了,邻居家还是一片喧哗,你过去说:“请安静一些。
”C.朋友夸你作文水平高,是全班第一,你说:“功夫不负有心人嘛!”D.王明对刚作完报告的英模说:“你的报告对我有一定的帮助,特此致谢。
”5.读下面的一首绝句,然后赏析。
(6分)海棠(宋)苏轼东风袅袅泛崇光①,香雾空朦月转廊。
只恐夜深花睡去,高烧银烛照红妆②。
注:①崇光:绚丽的光泽②红妆:指海棠。
这首诗抒发了诗人对海棠深切的眷恋。
一、二句写了哪些意象?它们构成的意境具有怎样的特点?答:意象有: 。
意境的特点是:。
6.给下面一则消息拟写一个标题,要求不能超过10个字。
(4分)据新华社三峡工地5月20日电 2006年5月20日14时,三峡坝顶上激动的建设者们见证了大坝最后一方混凝土浇筑完毕的历史性时刻。
至此,世界规模最大的混凝土大坝终于在中国长江西陵峡全线建成。
全国重点高中提前招生考试全真试卷
全国重点高中提前招生考试全真试卷(八)总分:100分考试时间:90分钟姓名:一、选择题(每小题4分,共40分)1.(2015年黄冈市市重点中学自主招生试题)伽利略创造的把实验、假设和逻辑推理相结合的科学方法,有力地促进了人类科学认识的发展。
利用如图8-1所示的装置做如下实验:小球从左侧斜面上的O点由静止释放后沿斜面向下运动,并沿右侧斜面上升。
斜面上先后铺垫三种粗糙程度逐渐降低的材时,小右侧斜面上升到的最高位置依次为1、2、3。
根据三次实验结果的对比,可以得到的最直接的结论是()A.如果斜面光滑,小球将上升到与O点等高的位置B.如果小球不受力,它将一直保持匀速运动或静止状态C.如果小球受到力的作用.它的运动状态将发生改变D.小球受到的力一定时,质量越大,它的速度越小2.(2015年黄冈市重点中学自主招生试题)如图是健身用的“跑步机”示意图。
质量为m的健身者踩在与水平面成a角的静止皮带上,用力向后蹬皮带,可使皮带以速度v匀速向后运动。
若皮带在运动过程中受到脚的摩擦力为f,则在运动的过程中,下列说法中正确的是()A.f是皮带运动的阻力B.人对皮带不做功C.人对皮带要做功,其做功的功率为fvD人的重力与皮带对人的支持力是一对平衡力3.(2014年华中师大一附中高中招生试题)实验室常用的弹簧秤如图8-3所示,弹簧的一端与连接有挂钩的拉杆相连,另一端固定在外壳上的O点,外壳上固定一个圆环,外壳和圆环的重为G,拉杆和挂钩的重为G0,弹簧质量忽略不计。
现将该弹簧秤在图甲所示的位置凋零后不动,再以如图乙和图丙的两种方式固定在地面上,并分别用图样的力F0(F0>G+G0)竖直向上拉弹簧秤,则稳定后弹簧秤的读数分别为()A.乙图读数为F0-G,丙数读数为F0-G0B.乙图读数为F0-G0,丙数读数为F0-GC乙图读数为F0-G0,丙数读数为F0-2GD.乙图读数为F0-G,丙数读数为F0-2G4(2012年蚌埠二中自自主招生试题)如图8-4所示,一个木块A放在长木板B上,弹簧秤一端接A,另一端固定在墙壁上,长木板B放在水平地面上,在恒力F作用下,长木版B以速度v匀速运动,水平弹簧秤的示数为T,下列关于摩擦力的说法正确的是()A木块受到的摩擦力大小等于FB.长木板受到的摩擦力大小等于TC.若长木板以2v的速度运动时,长木板受到的摩擦力大小等于2FD.若用2F的力作用在长木板上,木块受到的摩擦力大小仍等于T5(2016华中师大一附中高中招生试题)在学习物理过程中,某同学有以下观点:○1作为载体的电磁波,频率越高,相同时间内可传输的信息越多;○2光纤通信所说的激光,在光导纤维中通过折射传播;○3太阳能、核能都属于可再生能源;○4北导航系统进行定位和导航都是利用电磁波工作的;○5物体的温度越高,所含热量越多,内能一定大;○6内能同的两物体之间可能会发生热传递;○7可见光与无线电波在真空中的传播度大小相等;○8动圈式话筒的原理是电磁感现象,电线感应是把机械能转化为电能你认为其中说法正确的是()A. ○1○3○6○7B. ○1○2○4○6○8C. ○1○3○4○5D. ○2○5○7○86.(2014年华中师大一附中高中招生)如图8-5甲所的电路中,电源电压不变,小灯泡的额定电压为2.5V,滑动变阻器的最大阻值R0为定值电阻R0的3倍。
全国重点高中提前招生考试英语全真卷(精编文档).doc
【最新整理,下载后即可编辑】全国重点高中提前招生考试英语全真卷(本卷满分110分;用时90分)学校_______ 姓名______ 考号______ 分数______ 第Ⅰ卷客观题(共三大题,满分75分)Ⅰ. 单项填空。
(共20小题;每小题1分,满分20分从每小题所给的A 、B 、C 、D 四个选项中选出可以填入恐慌辈出的最佳选项。
( ) 1.―You’ve dropped _______ “s” in the word “success”.―Oh, _______ letter “s” i s doubled.A. a; aB. a; theC. an; theD. the; the( ) 2. The woman ________the child quickly and took him to hospital.A. put onB. dressedC. had onD. wore( ) 3. When you have borrowed a book from the library, you should keep it well, as if it were ______ of ______.A. that, yoursB. one, yoursC. that, youD. one, you( ) 4. ______ the man looks at his son ! He thinks his son is getting more and more ______.A. How angry ; carelesslyB. What angry ; carelesslyC. How angrily ; carelessD. What angrily ; careless( ) 5. They will leave for Paris _____ three o’clock in the afternoon and we’ll fly to London_______ a few weeks.A. after, inB. in, afterC. on, inD. after, after( ) 6. —I think the storybook Harry Potter is worth ________.—I don’t think so. I think it is too difficult for my son ________.A .to read;to readB .reading ;readingC .reading ;to readD .reading ;read( ) 7. Ten years_______ since my uncle ________ to Ningbo.A. have passed; wentB. passed; has goneC. has passed; has goneD. has passed; went( )8. ―Did you have a sound sleep last night?―Yes, never slept________.A. betterB. best C .badly D. worse( ) 9. Enough sleep is good for health. If you______ for your favorite TV programs, you willfeel sleepy.A. stay upB. give upC. pick upD. make up( ) 10. In the middle of the room stands a__________ table.A. beautiful wooden roundB. round wooden beautifulC. wooden beautiful roundD. beautiful round wooden( ) 11.―Who is making so much noise in the garden?―___________ the chi ldren.A. It isB. They areC. That isD. There are( ) 12.―What do you imagine ________ her so sad?―Losing her new storybook.A. to makeB. makeC. makingD. has made( ) 13. Some people waste a lot of food___________ others don’t have enough to eat.A. howeverB. whenC. asD. while( ) 14. Although all of the apples _____, none of them _____ good。
重点高中提前招生考试语数英试卷及答案
2019年重点高中高一分班考试考试数学试题满分:120分 时间:90分钟一、选择题(本题有10个小题,每小题3分,共30分)1.当1<a <2时,代数式︱a -2︱+︱1-a ︱的值是 ( ▲ ) A .-1 B .-3 C . 1 D .3 2.已知b a ,为实数,且1=ab ,设11+++=b b a a M ,1111+++=b a N ,则N M ,的大小关系是 ( ▲ )A .N M >B .N M =C .N M <D .无法确定3. 化简yx y x y x -+-22的结果是 ( ▲ ) A . y x + B .x y - C . y x - D . y x -- 4.已知()0332=++++m y x x 中,y 为负数,则m 的取值范围是 ( ▲ )A . m >9B . m <9C . m >9-D . m <9-5. 如图是一张简易活动餐桌,现测得OA=OB=30cm , OC=OD=50cm ,现要求桌面离地面的高度为40cm ,那么两条桌腿的张角∠COD 的大小应为 ( ▲ ) A .100° B .120° C .135° D .150° 6. 某市按以下标准收取水费:用水不超过20吨,按每吨1.2元收费,超 过20 吨则超过部分按每吨1.5元收费.某家庭五月份的水费是平均每吨1.25元, 那么这个家庭五月份应交水费 ( ▲ ) A .20元 B .24元 C .30元 D .36元 7.如图,一张半径为1的圆形纸片在边长为4的正方形内任意移动,则 在该正方形内,这张圆形纸片“能接触到的部分”的面积是 ( ▲ ) A .π-4 B . π C . π+12 D . 415π+8.已知一元二次方程x 2+bx -3=0的一根为-3,在二次函数y =x 2+bx -3的图象上有三点⎝⎛⎭⎫-45,y 1、⎝⎛⎭⎫-54,y 2、⎝⎛⎭⎫16,y 3,则y 1、y 2、y 3的大小关系是 ( ▲ ) A . y 1<y 2<y 3 B .y 2<y 1<y 3 C . y 3<y 1<y 2 D .y 1<y 3<y 29.已知20112012)322()223(-+=a ,则与a 最接近的整数是 ( ▲ ) A .6- B .5- C . 5 D . 610. 若不等式组⎪⎩⎪⎨⎧>>-a x x 1312的解为2>x ,则函数81)26(2+--=x x a y 图象与x 轴的交点情况是( ▲ )A .相交于两点B .没有交点C .相交于一点D .没有交点或相交于一点二、填空(本题有6个小题,每小题4分,共24分)11.分解因式 a a 64163+-= ▲ . 12.已知4个数据:4-,2,a ,b ,其中a ,b 是方程2220x x k +-=的两个根,则这4个数据的平均数是 ▲ . . 13. 已知31=-x x ,则代数式221xx += ▲ .14. 已知直角三角形的周长为14,斜边上的中线长为3,则直角三角形的面积为 ▲ .15. 已知a 、b 是一元二次方程012=-+x x 的两个根,则b a b a +++2222=___▲ .16.如图所示的二次函数y =ax 2+bx +c 的图象中,刘星同学观察得出了下面四条信息:(1)b 2-4ac >0; (2)0<+-c b a ; (3)2a -b <0; (4)a +b +c <0.你认为其中正确的有 ▲ (写出你认为正确的所有 信息的序号).三、解答题(本题有7小题,共66分) 17.(本题满分6分)如图,在梯形ABCD 中,AB ∥CD , °90D ∠=, 4CD =,ACB D ∠=∠,32tan =∠B , 求梯形ABCD 的面积.18. (本题满分10分)已知一次函数131+-=x y 和二次函数322++-=x x y . (1)在同一坐标系中作出两个函数的图象;(2)写出二次函数的顶点坐标及与其x 轴的交点坐标; (3)根据图象写出满足>++-322x x 131+-x 的x 的范围.19. (本题满分8分)(1)已知正数y x ,满足212342222=+-+yxy x y x ,且x ya =,求a 的值. (2)化简代数式()()3112131122+++-⨯-+-+a a a a a a a ,再根据(1)中求得的a 代入求值.20.(本题满分8分)如图,一次函数y =k 1x +b 的图象经过A (0,-2),B (1,0)两点,与反比例函数xk y 2= 的图象在第一象限内的交点为M ,若△OBM 的面积为2. (1)求一次函数和反比例函数的表达式;(2)在x 轴上找出点P 的坐标,使AM ⊥MP .yxoAA OBCD21.(本题满分10分)如图,C 为以AB 为直径的⊙O 上一点,AD 和过点C 的切线互相垂直,垂足为点D . (1)求证:AC平分∠BAD ;(2)过点O 作线段AC 的垂线OE ,垂足为点E (尺规作图,保留作图痕迹,不写作法); (3)若CD =4,AC =45,求垂线段OE 的长.22.(本题满分12分)已知二次函数)0(2222≠--=m m mx x y 的图像与x 轴交于A 、B 两点,它的顶点在以AB 为直径的圆上. (1)证明:A 、B 是x 轴上两个不同的交点; (2)求二次函数的解析式;(3)设以AB 为直径的圆与y 轴交于C ,D ,求弦CD 的长.23.(本小题满分12分)矩形OABC 在直角坐标系中的位置如图所示,A 、C 两点的坐标分别为(6,0)A 、(0,3)C ,直线34y x =与BC 边相交于点D .(1) 若抛物线2(0)y ax bx a =+≠经过D 、A 两点,试确定此抛物线的表达式;(2) 若以点A 为圆心的⊙A 与直线OD 相切,试求⊙A 的半径;(3) 设(1)中抛物线的对称轴与直线OD 交于点M ,在对称轴上是否存在点Q ,以Q 、O 、 M 为顶点的三角形与OCD ∆相似,若存在,试求出符合条件的Q 点的坐标;若不存在,试说明理由.2018年重点高中分班考试语文试题(满分:120分考试时间:90分钟)一、下面短文中有10处文字差错,请找出并订正。
全国重点高中提前招生考试真题卷英语
全国重点高中提前招生考试真题卷英语全文共3篇示例,供读者参考篇1National Key High School Early Admission ExaminationInstruction: This test includes five parts: listening, reading, writing, translating and speaking. You have 120 minutes in total. Please read the following instructions carefully before starting the exam.Part 1: ListeningIn this section, you will hear a recording of a conversation between two people and answer the questions following. You will hear each conversation only once, so listen carefully.1. What time does the library close on Sundays?A. 6:00 pmB. 7:00 pmC. 8:00 pmD. 9:00 pm2. Where does the man want to go this weekend?A. To the beachB. To the mountainsC. To the parkD. To the mallPart 2: ReadingRead the passage below and answer the questions.The United Nations (UN) is an international organization founded in 1945 after World War II to promote peace and cooperation among countries. It has 193 member states and its headquarters is in New York City. The UN has various agencies and programs that focus on issues like human rights, health, education, and environmental protection.3. When was the United Nations founded?A. 1945B. 1950C. 1960D. 19704. Where is the headquarters of the UN?A. LondonB. ParisC. TokyoD. New York CityPart 3: WritingWrite a short essay (approximately 150-200 words) on the following topic: Discuss the importance of education in today's society.Part 4: TranslatingTranslate the following sentences from English to your native language.5. The earth revolves around the sun.6. Water is essential for all living organisms.Part 5: SpeakingIn this section, you will be given a topic to discuss for 2 minutes. Speak clearly and provide examples to support your points.Overall, this examination is designed to test your English listening, reading, writing, translating and speaking abilities. Good luck!篇2National Key High School Advance Enrollment ExamThe National Key High School Advance Enrollment Exam is an important assessment for students in China who wish to attend top high schools. The exam is designed to test students' English language skills, as well as their critical thinking and problem-solving abilities. In this article, we will take a closer look at the exam format, sample questions, and tips for success.Exam Format:The National Key High School Advance Enrollment Exam consists of multiple-choice questions and short-answer questions. The exam is divided into four sections: Listening Comprehension, Reading Comprehension, Writing, and Speaking. Each section is designed to assess different aspects of the student's English proficiency.Sample Questions:Listening Comprehension:1. What is the main topic of the conversation?A. The weatherB. TravelC. FoodD. MoviesReading Comprehension:In paragraph 2, the author mentions that "______."A. The population is increasingB. The economy is boomingC. Pollution is a major problemD. Education is improvingWriting:Write a short essay on the importance of learning a second language. Include examples to support your opinion.Speaking:Describe your favorite holiday and explain why it is important to you.Tips for Success:1. Practice regularly: Make sure to practice your English skills regularly by reading, listening to English podcasts, and speaking with native speakers.2. Familiarize yourself with the format: Take the time to understand the structure of the exam and practice sample questions to improve your test-taking skills.3. Develop critical thinking skills: Work on developing your critical thinking and problem-solving abilities by analyzing complex texts and situations.4. Time management: Allocate your time wisely during the exam to ensure that you can complete all sections within the given time limit.5. Stay calm and focused: Stay calm and focused during the exam to avoid making careless mistakes and maximize your performance.In conclusion, the National Key High School Advance Enrollment Exam is a challenging but rewarding assessment that can open doors to top high schools in China. By preparing effectively and following the tips outlined in this article, students can increase their chances of success on the exam. Good luck to all students taking the exam!篇3National Key High Schools' Early Admission Exam English Test PaperPart I Reading Comprehension (40 points)(1) Read the text and answer the questions below.The Benefits of ReadingReading is one of the most beneficial activities one can engage in. Not only does it expand our knowledge and vocabulary, but it also improves our analytical thinking and problem-solving skills. In addition, reading helps reduce stress and can even improve our empathy levels.1. What are some benefits of reading?2. How does reading help reduce stress?(2) Read the passage and fill in the blanks with the correct words.The Importance of EducationEducation is the key to success in life. It (1)_____________ us with the knowledge and skills needed to achieve our goals. Without education, one may find it difficult to navigate thechallenges of the modern world. Therefore, it is crucial that we prioritize education in our lives.(3) Read the following passage and choose the best answer.The Impact of Social Media on SocietySocial media has become an integral part of our daily lives. It allows us to connect with friends and family, share information, and stay updated on current events. However, it also has its downsides, such as the spread of misinformation and the increase in cyberbullying. It is important to use social media responsibly and be aware of its potential negative effects.1. What is the main purpose of social media?A. To connect with friends and family.B. To spread misinformation.C. To increase cyberbullying.D. To stay updated on current events.Part II Writing (60 points)Write a composition of about 300 words on the following topic: "The Impact of Climate Change on Our Environment."Include the causes of climate change, its effects on our planet, and what individuals can do to help mitigate its impact.Part III Listening Comprehension (40 points)Listen to the recording and answer the following questions.1. What is the main topic of the recording?2. How can individuals reduce their carbon footprint?3. Why is it important to take action against climate change?Part IV Speaking (60 points)In this part of the exam, you will be asked to give a short presentation on a topic of your choice. You will have 5 minutes to prepare and 3 minutes to present your topic.These are just a few examples of the types of questions you may encounter in the National Key High Schools' Early Admission Exam English Test Paper. Good luck to all the students taking the exam!。
重点高中提前招生方程与整数问题
方程与整数解问题辅导练习 班级 姓名 1.方程y x y xy x 23322-=++的非负整数解),(y x 的组数为( ) A .0B .1C .2D .32. 已知实数,x y 满足(2008x y --=,则223233x y x y-+-2007-的值为( ))(A 2008-. )(B 2008. )(C 1-. )(D 1.3.已知点A 、B 分别在一次函数x y x y 8,==的图像上,其横坐标分别为a 、)0,0(>>b a b 。
若直线AB 为一次函数m kx y +=的图像,则当ab 是整数时,满足条件的整数k 的值共有( )个 A .1B .2C .3D .44.若实数a b 、满足等式2273 73,b a a a b b a b =-=-+,则代数式之值为( ) A .237-B .237C .2327-或 D .2327或5.在自变量x 的取值范围59≤x ≤60内,二次函数212y x x =++的函数值中整数的个数是( )A.59B.120C.118D.606.横坐标、纵坐标都是整数的点叫做整点,函数1236-+=x x y 的图象上整点的个数是………………………………………………………【 】 A .3个 B .4个 C .6个 D .8个9. 已知)2)(1(222234++++=+++nx x mx x x x x ,那 么n m +的值为( )(A )1 (B )2 (C )1- (D )2-10.若关于x 的方程2230x x m -+=的一个根大于2-且小于1-,另一个根大于2且小于3,则m 的取值范围是( ). (A )98m <(B )9148m -<<(C )95m -<<- (D )142m -<<- 11.关于x 的方程022=-+a x x 的所有实数根之和等于( )(A ) 1- (B ) 1 (C ) 0 (D ) 2a -12. 小明把棱长为4的正方体分割成了29个棱长为整数的小正方体,则其中棱长为1的小正方体有( ) (A )22个(B )23个(C )24个 (D )25个13、关于x 的不等式组 352+x >x-5 只有5个整数解,则a 的取值范围是( )23+x <x+2A. -6<a <-5.5B. -6≤a <-5.5C. -6<a ≤-5.5D.-6≤a ≤-5.514、在直角坐标系中,若一点的纵横坐标都是整数,则称该点为整点。
杭州市2019年重点高中实验班提前自主招生密卷-10--附解析-word版可编辑
初中物理能力测试卷-第十章-附详细解析一.选择题(共20小题)1.有a、b、c三个实心小球,其中a与b质量相等,b与c体积相同;将三个小球缓慢放入盛有水的容器中,待小球静止后,其状态如图所示,其中c球沉在容器底部.则下列判断正确的是()A.重力关系为G a=G b>G cB.密度关系为:ρa=ρb<ρcC.所受浮力关系为F a=F b=F cD.排开水的质量关系为m a=m b<m c2.如图所示,甲图中圆柱形容器中装有适量的水.将密度均匀的木块A放入水中静止时,有2/5的体积露出水面,如图乙所示,此时水对容器底部的压强比图甲水对容器底部的压强增加了300Pa.若在木块A上表面轻放一个质量为m1的物块,平衡时木块A仍有部分体积露出水面,如图丙所示,此时水对容器底部的压强比图甲水对容器底部的压强增加了400Pa.若将容器中的水换成另一种液体,在木块A上表面轻放一个质量为m2的物块,使平衡时木块A露出液面部分与丙图相同,如图丁所示.若m1:m2=5:1,则下列说法中错误的是()A.木块A的质量m A与m1之比为1:3B.在丁图中,液体的密度为0.8×103kg/m3C.木块A的密度为0.6×103kg/m3D.在图丙中,木块A露出水面的体积与木块A的体积之比是1:53.在装有水的烧杯中漂浮着甲、乙两个实心球,两球露出水面的体积相等,已知两球的质量m甲>m乙.当往水中慢慢倒入酒精并缓慢搅拌的过程中,甲球的浮力大小F与时间t的变化关系如图所示.则关于乙球开始沉没于液面之下的时刻t′与t0关系正确的是()A.t′>t0B.t′=t0C.t′<t0D.乙球不可能沉入液面下4.如图所示,将甲乙两个容器放在水平桌面上,甲、乙两容器的底面积分别为S甲和S乙.甲容器中盛有密度为ρ1的液体,乙容器中盛有密度为ρ2的液体.现将体积相等的A、B两个物体分别放入甲、乙两容器后,物体A悬浮,物体B漂浮且有一半体积露出液面,此时两容器液面相平.液体对甲容器底部的压强为p1,压力为F1;液体对乙容器底部的压强为p2、压力为F2.已知物体A与物体B的密度之比为2:3,S乙=3S甲.则下列判断正确的是()A.P1=P2,9F1=F2B.P1<P2,9F1=F2C.P1=P2,6F1=F2D.P1<P2,6F1=F25.如图所示,在盛有水底面积为S1的圆柱形容器内放有一木块A,A的底面积为S2,在木块A 的下方用轻质细线悬挂一体积与之相同的金属块B,金属块B浸没在水内,而木块A刚好浸没在水中,水面正好与容器口相齐,某瞬间细线突然断开,待稳定后水面下降了h1;然后取出金属块B,水面又下降了h2;最后取出木块A,水面又下降了h3;以下判断错误的是()A.A物体的体积为(h1+h3)S1B.A与B的密度比h3:(h1+h2)C.A与B的总质量为ρ水S1(h1+h2+h3)D.要把漂浮的A物体再次压没在水中,其上所放铁块的质量最小为ρ水(S2﹣S1)h16.甲、乙两相同的容器中装有体积相等的两种液体,静止放置在水平桌面上,将同种材料制作的实心物体A、B分别放入两容器中,静止时液面等高,如图所示,则()A.A的重力小于B的重力B.甲杯中液体的密度大于乙杯中液体的密度C.甲杯对桌面的压力等于乙杯对桌面的压力D.甲容器底部所受液体压强小于乙容器底部所受液体压强7.碳酸饮料(汽水)类产品是指在一定条件下充入二氧化碳气体的饮料,如图是一瓶喝剩下的汽水,瓶壁上还附有许多气泡,振荡一下,一些气泡就会离开瓶壁,上浮,最后露出水面消失.下列说法中有科学道理的是()A.打开瓶盖时,有大量气泡冒出是由于温度升高气体溶解度减小引起的B.振荡前该饮料是二氧化碳的不饱和溶液C.瓶壁上气泡一定受到浮力的作用,且气泡受到的浮力等于气泡的重力,所以没有上浮D.气泡在上升的过程中,气泡逐渐变大,所受的浮力也逐渐变大8.一块冰浮于盐水中,如图那么当冰熔化前后,其液面将()A.升高B.降低C.不变D.无法判断9.如图所示,悬吊的实心金属球缓慢浸没于倾斜的盛满水的大烧杯中,沉到底部,则从大烧杯溢出流入小烧杯中的水和此金属球的关系是()A.两者体积相等,小烧杯中水的质量较大B.金属球受到的浮力大于小烧杯中水的重力C.金属球受到浮力小于小烧杯中水的重力D.两者体积相等,小烧杯中水的质量较小10.A和B是密度为ρ=3g/cm3的某种合金制成的两个小球,A球的质量为m A=60g;甲和乙是两个完全相同的木块,其质量为m甲=m乙=200g.若用细线把球和木块系住,则在水中平衡时如图,甲有一半体积露出水面,乙浸没水中(g取10N/kg).则下列计算正确的是()A.木块的密度为0.4g/cm3B.如果剪断木块乙和B球之间的细线,B球静止后,所受重力和浮力的合力的大小为1.6N C.如果剪断木块乙和B球之间的细线,乙木块露出水面的体积为2×10﹣4m3D.如果剪断木块甲和A球之间的细线,A球静止后,所受重力和浮力的合力为0.4N 11.水、物质A、物质B的质量与体积的关系如图所示.分别用A、B两种物质制成质量相等的甲、乙两个实心物体,将它们放入足够多的水中,静止后()A.甲沉在容器底部,F浮甲>F浮乙B.甲漂浮,F浮甲<F浮乙C.乙沉在容器底部,F浮甲>F浮乙D.乙漂浮,F浮甲<F浮乙12.两个容器中分别盛有甲、乙两种不同的液体,把体积相同的A、B两个实心小球放入甲液体中,两球沉底;放入乙液体中,两球静止时的情况如图乙所示.则下列说法不正确的是()A.小球A的质量小于小球B的质量B.甲液体的密度小于乙液体的密度C.小球A在甲液体中受到的浮力大于在乙液体中的浮力D.在甲液体中容器底对小球A的支持力小于对小球B的支持力13.水平桌面上的大烧杯内装有水,轻轻放入一个小球后,从烧杯中溢出200g的水,则下列判断正确的是()A.小球所受浮力可能大于1.96NB.小球的质量可能小于200gC.小球的体积一定等于200cm3D.水对烧杯底的压强可能减小14.如图甲所示,烧杯里盛有6℃的水,小球恰好处于水面下,水的密度随温度的变化如图乙所示,现在烧杯四周放上大量的冰块,在烧杯内水温下降到0℃的过程中,若小球的体积始终不变,则小球所受浮力大小的变化情况是()A.先不变,后变小 B.先不变,后变大C.先变大,后变小,沉底后不变D.先变大,后变小,4℃时最大15.某容器装满水,轻轻放入一小球后,溢出50g水,则下列判断正确的是()A.小球的质量肯定小于50gB.小球的质量肯定等于50gC.若小球质量大于50g,则小球的体积一定等于50cm3D.若小球质量等于50g,则小球的体积一定大于50cm316.甲、乙两个实心物体,它们的质量相同,其密度分别为0.8×103千克/米3和0.4×103千克/米3的,甲、乙均被弹簧拉住,使它们静止在水中,受到的浮力分别为F甲和F乙,则下列判断正确的是()A.甲、乙物块所受浮力之比为1:1B.甲、乙物块所受浮力之比为2:1C.甲、乙物块所受弹簧拉力之比为2:3D.甲、乙物块所受弹簧拉力之比为1:617.有一空心球,它的空心部分的体积是整个球体积的一半将此球放入水中,稳定后恰有的体积浸入水中,如果此球是实心的(与空心球为同种物质组成),放入水中将会()A.漂浮在水面B.下沉到水底C.悬浮在水中D.无法判断18.湖面漂浮着一条船,船里有许多块石头,现在把石头拿出来,丢进水里,湖水水面会有什么变化()A.不变B.上升C.下降D.无法确定19.如图所示,在一块长方形的泡沫塑料上用细线缚着一块卵石,使它漂浮在玻璃缸内的水面上.这时泡沫塑料恰好露出一半体积,玻璃缸里的水面在缸壁的a处.现将泡沫塑料和卵石翻个身,使卵石在泡沫塑料的下面,并仍放在原来玻璃缸的水中,当它平衡时,玻璃缸中的水面位置()A.在a处以上B.在a处以下C.仍在a处D.条件不足,无法判断20.如图所示为自制密度计,是在粗木棒的一端缠绕一些铜丝做成的,现将其放入甲乙两种液体中,液面保持相平.下列说法错误的是()A.在粗木棒的下端缠绕铜丝,是为了让密度计漂浮在液体中B.密度计在甲乙两种液体中排开液体的质量相等C.密度计在甲液体中所受向上的压强比乙大D.甲液体对容器底的压强比乙小二.多选题(共15小题)21.如图是公共厕所常见的自动冲水装置原理图,浮筒P为正方体其体积V=8×10﹣3m3的,另有一厚度不计,质量不计,面积S=8×10﹣3m2的盖板Q盖在水箱底部的排水管上.连接P、Q 的是长为0.3m,体积和质量都不计的硬杠.当供水管流进水箱的水使浮筒刚好完全浸没时,盖板Q恰好被拉开,水通过排水管流出冲洗厕所.当盖板Q恰好被拉开的瞬间,则()(取g=10N/kg)A.浮筒受到的浮力80N B.水对盖板Q的压强500PaC.浮筒P的质量4kg D.水对盖板Q的压力30N22.如图所示,烧杯的底面积是200cm2,里面装有一定量的水(图甲),用弹簧测力计吊着未知金属物体,先将物体浸没在水中(图乙),水位升高到B处,弹簧测力计的示数是18N;再将物体缓慢提出,使水位下降到AB的中点C处,此时弹簧测力计的示数是23N(不计物体带出的水).g取10N/kg,下列判断中正确的是()A.物体的质量是2.8kgB.物体的体积是1×10﹣3 m3C.物体浸没时受到的浮力是15ND.从乙到丙,水对烧杯底面的压强减小了260Pa23.如图甲所示,长方体金属块在细绳竖直向上拉力作用下从水中开始一直竖直向上做匀速直线运动,上升到高于水面一定的高度处,图乙是绳子拉力F随时间t变化的图象.取g=10N/kg,根据图象信息,下列判断错误的是()A.该金属块重力的大小为54NB.浸没在水中的金属块受到的浮力大小是20NC.在t1至t2时间段金属块在水中受到的浮力逐渐增大D.该金属块的密度是3.4×103kg/m324.测量液体密度的仪器叫密度计.将其插入被测液体中,待静止后直接读取液面处的刻度值,即可测出该液体的密度值(图甲).自制的简易密度计是在木棒的一端缠绕一些铜丝做成的.水平桌面放置两个完全相同的烧杯,烧杯内装有密度不同的液体,将两只完全相同的自制密度计分别放入乙、丙烧杯中,待密度计静止后,两烧杯液面相平(如图所示).以下说法正确的是()A.乙杯中液体的密度小于丙杯中液体的密度B.密度计在乙杯中受到的浮力等于在丙杯中受到的浮力C.乙烧杯对桌面的压力大于丙烧杯对桌面的压力D.密度计在乙烧杯排开液体的质量等于密度计在丙烧杯排开液体的质量25.弹簧测力计下挂一长方体物体,将物体从盛有适量水的烧杯上方离水面某一高度处缓缓下降,然后将其逐渐浸入水中如图甲;图乙是弹簧测力计示数F与物体下降高度h变化关系的图象,则下列说法中正确的是()A.物体的体积是400cm3B.物体受到的最大浮力是8NC.物体的密度是1.5×103kg/m3D.物体刚浸沉时下表面受到水的压力是12N26.水平桌面上放有甲、乙、丙三个完全相同的圆柱形容器,容器中装有适量水,在容器中分别放入体积相同的A、B、C三个小球,三球静止时,A漂浮、B悬浮、C沉底,此时三容器中水面恰好相平,如图所示.则下列说法正确的是()A.三个小球的密度关系是ρA>ρB>ρCB.三个小球的重力关系是G A=G B<G CC.三个小球所受浮力关系是F A<F B=F CD.三个容器对桌面压力关系的F甲=F乙<F丙27.一底面积为S0圆柱形容器中装有适量的水,质量分别为m1和m2的甲、乙两实心小球用一根无弹性细线连在一起.将它们放入水中后恰好悬浮,如图所示,此时细线上的拉力为T0.下列判断正确的是()A.甲球的密度为B.乙球的体积为C.将细线剪断待两小球静止后,液面下降的高度为D.将细线剪断待两小球静止后,甲球露出水面的体积为28.如图所示,将容器放在水平桌面上,容器中盛有密度为ρ重力为G1的液体,现将重力为G B的物体B放入容器后,物体B漂浮且有一半体积露出液面,此时液面上升了h.液体对容器底部的压强为p1、压力为F1,液体对物体B的压力为F B.已知容器重力为G2,底面积为S,容器对桌面的压强为p2、压力为F2,桌面对容器的支持力为F3.则下列选项正确的是()A.F B大小为ρghS B.G1、G2、G B之和与F3大小相等C.G1、G B之和与F1大小相等D.F2与F3是一对相互作用力29.底面积为S1的圆柱形容器内盛有密度为ρ1的某种液体,其深度为h1.另有一底面积为S2、高为h2、密度为ρ2的圆柱体(S1>S2),将其竖直缓慢放入容器中,待其静止时,容器内液体没有溢出,圆柱体仍处于竖直状态,圆柱体所受浮力可能是()A.ρ2S2h2g B.ρ1S2h2gC.ρ1h1g D.ρ1h2g30.柱状容器内放入一个体积大小为200厘米3的柱状物体,现不断向容器内注入水,并记录水的总体积V和所对应的水的深度h,如下表所示,则下列判断中正确的是()A.物体的底面积S1为8厘米2B.容器的底面积S2为12厘米2C.物体的密度为0.7×103千克/米3D.物体所受到的最大浮力为1.4牛31.在质量和底面积均相同的甲、乙两个容器中,装入质量相等的不同液体,放在水平桌面上,如图所示.将小球A放在甲容器的液体中,小球漂浮,将小球B放在乙容器中,小球下沉(液体均未溢水).则下列判断正确的是()A.两容器中不放小球时,乙容器底受到的液体压强大B.如果两球质量相同,小球A在甲容器中受到的浮力大C.如果两球体积相同,小球B在乙容器中受到的浮力一定大D.如果两球完全相同,将小球放入两容器的液体中,静止时甲、乙两容器对桌面的压强一定相等32.如图所示容器内放有一长方体木块M,上面压有一铁块m(铁块的密度为ρ铁),木块浮出水面的高度为h1(图a);用细绳将该铁块系在木块的下面,木块浮出水面的高度为h2(图b);将细绳剪断后(图c),木块浮出水面的高度为h3,下列选项正确的是()A.若ρ铁已知,则h3=h1+B.若ρ铁已知,则h3=h2+C.若h3已知,则ρ铁=D.若h3已知,则ρ铁=33.甲、乙两个实心小球,它们的体积分别为V甲、V乙,密度分别为ρ甲、ρ乙,质量分别为m甲、m乙.在如图所示的A、B两个容器中分别装有密度为ρ1、ρ2的液体,已知它们的密度关系为ρ1<ρ甲<ρ乙<ρ2,则:()A.若V甲=V乙,将甲、乙都放入容器A中,静止时所受浮力之比为ρ2:ρ1B.若V甲=V乙,将甲、乙都放入容器B中,静止时所受浮力之比为ρ乙:ρ甲C.若m甲=m乙,将甲、乙都放入容器B中,静止时所受浮力之比为1:1D.若m甲=m乙,将甲、乙分别放入容器A、B中,静止时所受浮力之比为ρ1:ρ甲34.如图所示,木块A漂在水面上时,量筒内水面对应刻度为V1;当木块上放一金属块B时,A刚好浸没,水面对应刻度为V2,若将小金属块取下,使其慢慢地沉入量筒底时,水面对应的刻度为V3,下列说法中正确的是()A.木块的重为ρ水g V1B.金属块重为ρ水g (V2一V1)C.木块的密度为ρ水V3/V1D.金属块的密度为ρ水(V2﹣V1)/(V3﹣V1)35.两个完全相同的容器内装有甲、乙两种液体,将同一个小球分别投入到两个容器中,小球静止时位置如图,容器内液面等高.下列说法正确的是()A.液体的密度关系是ρ甲>ρ乙B.容器底受到的液体压强的关系是p甲=p乙C.小球受到的浮力大小关系是F浮甲>F浮乙D.小球在甲液体中静止时所受浮力与重力的大小关系是F浮甲=G三.解答题(共5小题)36.在底面积为S1的圆柱形水槽中放有部分水(密度为ρ水),在水面上漂浮着一块横截面积为S2、高为h0的圆柱形物块,物块浸入水中的深度为h,如图(a)所示.(1)请画出物块的受力分析图;(2)若沿物块上下面中心的连线,将物块镂空贯通,镂空部分的横截面积为S0,物块仍放入原水槽中,如图(b)所示,平衡后与图(a)比较,求水面下降的高度;(3)若将镂空部分压在物块上,再放入原水槽中,如图(c)所示,平衡后与图(b)比较,求物体下端下降的高度.37.如图所示是一个水位高度控制装置的示意图,当水位到达高H时,水恰好顶起塞子A从出水孔流出,水位下降后,塞子A又把出水孔堵住,塞子A底部是半径为r的半球,半球恰好=4πr2,圆面积公式是S 塞入出水孔中.已知球的体积公式是V=,球表面面积公式是S球=πr2,水的密度为ρ,为满足水位高度自动控制的要求,塞子的质量应为多少?圆38.在远洋轮船的船舷上,都漆着几条”载重线“,俗称”吃水线“.轮船满载时,水面不能超过规定的”载重线“.船锚是锚泊设备的主要部件,用铁链连在船上,抛在水底,可以使船停稳.(1)如图所示,为一搜远洋轮船及载重线的示意图,其中标有”W“的是北大西洋的载重线,其中标有”W“的是北大西洋的载重线,标有”S“的是印度洋时,轮船在海水中受到的浮力将(选填”变大“”变小“或”不变“)(2)该远洋轮船自重为3.92×102N,空载漂浮在水面上,求该远洋轮船受到的浮力.(3)该远洋轮船满载货物时吃水深度是 3.2m,已知轮船浸入水中部分的平均横截面积是5000m2,求该船最多可载多重货物.(计算时海水的密度取1×103kg/m3)(4)当锚放在船舱里,船静止在水中时,在水平面处画上标记线,记作l1;用绳子拴住船锚,将船锚悬挂在船下方的水中且完全浸没,在水平面处画上标记线l2,此时标记线的位置将.(选填“升高”“降低”或“不变”)(5)把绳子放得更长些,直至线松了,锚沉在水底,在水平面处画上标记线l3,利用这些吃水线,计算船锚的密度ρ.(海水的密度用ρ0表示)39.如图所示,将质量为0.6kg,边长为0.1m的正方体木块放在水平桌面上,再将其轻放入底面积为200cm2,内有25cm高的水的圆柱形容器中.(未有水溢出)求:(I)木块静止后受到的浮力大小?(2)要使木块恰好浸没在水中,至少要在木块上放多少千克的钩码?(3)木块从静止在水面到恰好浸没的过程中,木块下降的高度?40.科技小组利用学到的浮力知识制作一个浮力.他们找来一个空饮料瓶,剪掉瓶底,旋紧瓶盖,在瓶盖处系一块质量适当的小石块,然后将其倒置在水里,如图所示,已知该饮料瓶圆柱状部分的横截面积为50cm2,总重为0.6N.当瓶中不放被测物体时,水面所对位置为零刻度,再利用适当的方法完成刻度.使用时,只要把被测物体放入瓶中,从水面所对的刻度就可以直接读出被测物体的质量.(1)装置中小石块的作用是.(2)饮料瓶中放上200克物体后,200克刻度线与零刻度线的距离是多少?(3)利用浮力的知识证明这种浮力秤的刻度是均匀的.(用物理量表示,已知放入物体的质量为m,圆柱部分的横截面积为S,对应刻度线与零刻度线的距离为h,水的密度为ρ)2018年03月18日136****8620的初中物理组卷难题集萃,10章参考答案与试题解析一.选择题(共20小题)1.有a、b、c三个实心小球,其中a与b质量相等,b与c体积相同;将三个小球缓慢放入盛有水的容器中,待小球静止后,其状态如图所示,其中c球沉在容器底部.则下列判断正确的是()A.重力关系为G a=G b>G cB.密度关系为:ρa=ρb<ρcC.所受浮力关系为F a=F b=F cD.排开水的质量关系为m a=m b<m c【解答】解:A、b悬浮,c沉入底部,所以F b=G b,F c<G c;因为b与c体积相同,所以根据F浮=ρgV排可知:F b=F c,所以G b<G c;则G a=G b<G c,故A不正确;B、当物体的密度大于液体的密度时物体下沉,当物体的密度等于液体的密度时物体悬浮,当物体的密度小于液体的密度时物体上浮或漂浮,所以根据a漂浮、b悬浮、c沉入底部可知:ρa<ρb<ρc,故B不正确;C、由图可知,a漂浮,b悬浮,因为当物体的重力等于受到的浮力时物体悬浮或漂浮,所以F a=G a,F b=G b;所以a与b质量相等,则物体的重力相等,故浮力F a=F b,因为F浮=ρgV排,所以V排b=V排c,故F b=F c,故所受浮力关系为F a=F b=F c,故C正确;D、据浮力关系为F a=F b=F c,结合F浮=G排=m排g可知,排开水的质量关系为m a=m b=m c,故D不正确.故选C.2.如图所示,甲图中圆柱形容器中装有适量的水.将密度均匀的木块A放入水中静止时,有2/5的体积露出水面,如图乙所示,此时水对容器底部的压强比图甲水对容器底部的压强增加了300Pa.若在木块A上表面轻放一个质量为m1的物块,平衡时木块A仍有部分体积露出水面,如图丙所示,此时水对容器底部的压强比图甲水对容器底部的压强增加了400Pa.若将容器中的水换成另一种液体,在木块A上表面轻放一个质量为m2的物块,使平衡时木块A露出液面部分与丙图相同,如图丁所示.若m1:m2=5:1,则下列说法中错误的是()A.木块A的质量m A与m1之比为1:3B.在丁图中,液体的密度为0.8×103kg/m3C.木块A的密度为0.6×103kg/m3D.在图丙中,木块A露出水面的体积与木块A的体积之比是1:5【解答】解:(1)设A的体积为V、容器的底面积为S,∵A在水中漂浮,∴F浮=ρ水V排g=ρ水Vg=G A,甲图和乙图比较,容器底受到的压力差:△F=G A,比较甲乙两图,△P====300Pa,﹣﹣﹣﹣①同理,比较甲丙图,△P′===400Pa,﹣﹣﹣﹣②得:m A:m1=3:1,V排′=V;此时木块A露出水面的部分占自身体积;故A错误,D正确.(2)在丙图中,由于m1和A漂浮,可得:ρ水g V=G A+m1g=ρ水g V+m1g,∴m1=ρ水V,在丁图中,ρ液g V=G A+m2g=ρ水g V+m2g,∴m2=ρ液V﹣ρ水V,∵m1:m2=5:1,即:(ρ水V):(ρ液V﹣ρ水V)=5:1,解得:ρ液=0.8ρ水=0.8×1.0×103kg/m3=0.8×103kg/m3.故B正确;(2)在乙图中,木块漂浮,则ρ水g V=ρ木gVρ木=ρ水=×1×103kg/m3=0.6×103kg/m3.故C正确.故选A.3.在装有水的烧杯中漂浮着甲、乙两个实心球,两球露出水面的体积相等,已知两球的质量m甲>m乙.当往水中慢慢倒入酒精并缓慢搅拌的过程中,甲球的浮力大小F与时间t的变化关系如图所示.则关于乙球开始沉没于液面之下的时刻t′与t0关系正确的是()A.t′>t0B.t′=t0C .t′<t 0D .乙球不可能沉入液面下【解答】解:由题意和图示可知,甲球受到的浮力先不变,随着酒精的加入,混合液体的密度逐渐减小,浮力减小,当浮力小于重力时(液体的密度小于甲球的密度),甲球下沉. ABC 、因为G=mg ,且m 甲>m 乙,所以G 甲>G 乙, 又甲、乙两个实心球漂浮在水中, 所以F 浮甲=G 甲,F 浮乙=G 乙, 则F 浮甲>F 浮乙, 又因为F 浮=ρ液gV 排, 所以V 排甲>V 排乙,甲和乙露出水面的体积相等,所以甲的体积比乙的体积大; 物体漂浮,所以F 浮=G=mg ,即ρ水gV 排=ρ(V 排+V 露)g ,则物体的密度ρ==,因为甲、乙露出部分的体积相等,且V 排甲>V 排乙, 所以ρ甲>ρ乙;又因为甲球的密度较大,故甲球早开始浸没,因为甲和乙露出水面的体积相同,若乙球能浸没,则甲早浸没于混合液体中,即乙球开始沉没于液面之下的时刻t′大于甲球开始沉没于液面之下的时刻t 0,故A 正确,BC 错误;D 、因为不知道乙和酒精与水混合液的密度大小关系,所以不能判断乙球是否沉入液面下,故D 错误. 故选A .4.如图所示,将甲乙两个容器放在水平桌面上,甲、乙两容器的底面积分别为S 甲和S 乙.甲容器中盛有密度为ρ1的液体,乙容器中盛有密度为ρ2的液体.现将体积相等的A 、B 两个物体分别放入甲、乙两容器后,物体A 悬浮,物体B 漂浮且有一半体积露出液面,此时两容器液面相平.液体对甲容器底部的压强为p 1,压力为F 1;液体对乙容器底部的压强为p 2、压力为F 2.已知物体A 与物体B 的密度之比为2:3,S 乙=3S 甲.则下列判断正确的是( )A.P1=P2,9F1=F2B.P1<P2,9F1=F2C.P1=P2,6F1=F2D.P1<P2,6F1=F2【解答】解:(1)根据物体的浮沉条件可知:物体A悬浮,则ρA=ρ1,物体B漂浮,ρB<ρ2,又因为物体A与物体B的密度之比为2:3,即ρA<,所以ρ2>ρ1.液体对甲容器底部的压强p1=ρ1gh,液体对乙容器底部的压强p2=ρ2gh,又因为ρ2>ρ1,所以p1<p2.=G B,(2)物体B漂浮且有一半体积露出液面,则F浮即:ρ2g V=ρB Vg,所以ρ2=2ρB,由p=得液体对甲容器底部的压力:F1=p1S甲=ρ1ghS甲=ρA ghS甲液体对乙容器底部的压力:F2=p2S乙=ρ2ghS乙=2ρB ghS乙,则====,即9F1=F2.故选B.5.如图所示,在盛有水底面积为S1的圆柱形容器内放有一木块A,A的底面积为S2,在木块A 的下方用轻质细线悬挂一体积与之相同的金属块B,金属块B浸没在水内,而木块A刚好浸没在水中,水面正好与容器口相齐,某瞬间细线突然断开,待稳定后水面下降了h1;然后取出金属块B,水面又下降了h2;最后取出木块A,水面又下降了h3;以下判断错误的是()A.A物体的体积为(h1+h3)S1B.A与B的密度比h3:(h1+h2)C.A与B的总质量为ρ水S1(h1+h2+h3)D.要把漂浮的A物体再次压没在水中,其上所放铁块的质量最小为ρ水(S2﹣S1)h1。
上海重点高中自主招生英语试题及答案(1)
上海重点⾼中⾃主招⽣英语试题及答案(1)冲刺四校⾃招5套精析版模拟卷(1)⼀、单选:1.——You looked upset. What’s the matter?——My plan was _____ again.A. turned onB. turned downC. turned upD. turned off2.--- Can your factory really afford ____ food for the people in the flooded area?--- I believe we can because we have ____ workers.A. a number of; plenty ofB. a large amount of; the number ofC. plenty of; the number ofD. a large amount of; a number of3.Don’t worry. I’m sure you’ll succeed _______ if you work hard.A. on timeB. in timeC. at timesD. ahead of time4.He liked the article in the newspaper so much that he ______ his own work and translated it into EnglishA. set outB. turned downC. cut outD. set aside5.He played the computer game till late last night, ________,early this morning.A. rather thanB. or ratherC. other thanD. more than6. — Let's hurry. Professor Beach is coming.— Oh, I was afraid that we ___________.A. already miss himB. will miss himC. have already missed himD. had already missed him7. The mother hurried into Jack’s room and found him __________ at the desk.A. seatedB. seatingC. was seatingD. to be seating8. — Shall I tell Sally about it?—No, you ___________. I’ve told her already.A. shouldn’tB. mustn’tC. needn’tD. can’t9. — Do you know ___________ the MP3 player last week?—Sorry, I have no idea.A. how much did she pay forB. how much she paid forC. how much will she pay forD. how much she will pay for10. I have no one ___________ me, for I am a new comer here.A. helpedB. helpingC. to helpD. to have helped答案:1-5 BDBDB 6-10DACBC解析:1. 考查词组:A.turned on打开B.turned down拒绝C.turned up出现D.turned off关掉,句意:--你看起来很难过,怎么了?--我的计划⼜被拒绝了。
高中提前招生考试英语试卷(含答案)诸暨市
重点中学提前招生考试英语试卷考生须知:1、本试卷共七个大题,总分100分,考试时间90分钟。
请将答案做在答题卷上。
2、答题前,先用钢笔或圆珠笔在答题卷规定位置上填写学校、姓名、准考证号。
一、单项选择(本题有15小题,每小题1分,共计15分)从A、B、C、D四个选项中,选出可以填入空白处的最佳答案。
1. Everyone can have _______ ID card, even a newly-born baby.A. aB. anC. theD. /2. There’s something wrong with my computer. May I use ______?A. yourB. mineC. youD. yours3. It’s so crowded here. Let’s make some ______ for the baby.A. houseB. roomC. seatsD. chairs4. _______ the kind people around, he was sent to hospital in time and saved by the doctors.A. Thanks toB. Thanks forC. BecauseD. Because for5. He _______ be in the restaurant. His car is just outside it!A. canB. can’tC. mustD. mustn’t6. -When _______ the Art Club ______? -In 2003.A. was; foundB. was; foundedC. has; foundedD. did; found7. The soft music makes Amy ______. She soon fell asleep.A. excitedB. relaxedC. interestedD. surprised8. -_______ is the weather in Australia now?-Hmm, it’s summer there and a little windy.A. HowB. WhatC. What aboutD. How about9. -How long have these Indian kids _______ this Chinese school?-For about three years.A. come toB. been toC. been inD. joined10. -What language do they _______ in their country?-English and French.A. tellB. sayC. speakD. talk11. -What do you think of the new-comer?-He is easy _______ .A. to get along withB. to get alongC. getting alongD. getting along with12. -Is your son already in London ?-Not yet, I think. He’ll give me a call as soon as he ______.A. will arriveB. will reachC. arrivesD. reaches13.-When shall we start?-Let’s _____ it 7:30. Is that all right?-That’s a good idea.A. tryB. meetC. takeD. make14. -Would you please tell me _______ next, Miss Yang?-Sure. Let me see.A. what should we doB. we should do whatC. what we should doD. should we do what15. -You haven’t been to the West Lake in Hangzhou, have you?-______. How I wish to go there!A. Yes, I haveB. Yes, I haven’tC. No, I haveD. No, I haven’t二、完形填空(本题有15小题,每小题1分,共计15分)阅读下面短文,然后在各题所给的四个选项中选出一个最佳答案。
(2021年整理)年全国重点高中提前招生考试全真试卷
2015年全国重点高中提前招生考试全真试卷编辑整理: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(2015年全国重点高中提前招生考试全真试卷)的内容能够给您的工作和学习带来便利。
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2015年全国重点高中提前招生考试全真试卷文科综合—---英语部分(测评时间:45分钟满分:75分)一.单项选择(共15题,每小题1分,满分15分)从A,B,C,D四个选项中,选出可以填入空白处的最佳选项) 1。
—-—Why didn’t Cindy play the violin at the concert last night。
-——She said her hand hurt, but that was only a(n)___.I saw her play tennis last night。
(2014河北省重点高中自主招生试题)A。
matter B. expression C. result D. excuse2. Her ___face suggested she____ high grades in the exams.A。
exciting; achieved B。
excited; achievedC. exciting: achieve D。
excited: achieve3. —--Do you want David or Brown to do it ?—-——-_______is fit for the job,I’m afraid.(2015年黄冈中学理科实验班预录试题)A. EitherB. Both C。
重点高中新生提前招生语数英试卷含答案
2019年高中新生提前招生选拔考试语文试卷( 提示:满分120分考试时间:120分钟试卷请直接答在答题纸上)一、语言积累与运用:(24分)1、根据语境填字:(3分)青春,总在人们的qĭ( ) 盼中倏忽而逝,又在人们留恋中姗姗而来。
当心灵的帆船回sù( ) 岁月的长河时,我们能够看到:在那阳光明媚、金色的羽毛升起的地方,矗立在歌吟里、掩yìng ( ) 在诗词中,最耀眼的是那扇神奇玄妙的青春之门。
2、典故杂吟:参照示例,在对联中写出两个成语典故。
(2分)沧桑世事见天壤,唇齿衔环今古情。
缘木守株贻笑柄,枕戈尝胆赞英名。
示例:沧桑——沧海桑田①②3、根据原文默写。
(7分)①学而不思则罔,。
②,各领风骚数百年。
③人有悲欢离合,。
④,为有源头活水来。
⑤无意苦争春,。
⑥,引无数英雄竞折腰。
⑦读下面每句话,都会想起一个名句。
根据你的理解,任选其中一句,填在横线上。
(1分)陶渊明那朵菊花温暖了宁静深远的峰峦。
李白的愁情汇成了滔滔江水。
杜甫的雄心量出了泰山的高度。
刘禹锡的乐观幻化成千帆竞发、生机勃发的图景。
,4、依次填入下面一段文字中横线处的语句,与上下衔接最恰当的一组是()(3分)我花了一整天的工夫,在洱海徜徉,只为了从多个角度观察洱海,从多个层面领略洱海。
它给人许多美好的感受,给人许多浪漫的联想。
①近看,洱海是清澈的,透明的,游鱼水草,历历可数。
②灰的灵动跳跃,绿的深沉醉人。
③远眺,洱海是蔚蓝的,开阔敞亮,令人心胸豁达。
④这两种色彩是独立的,互不交融,互不渗透。
⑤从苍山看洱海,在阳光的照耀下,洱海是大片的灰白,大片的翠绿。
A.①③⑤②④ B.①⑤③④② C.①②③⑤④ D.①③②⑤④5、读下面一段话,完成题目。
(2分)①青少年正处于发育阶段,②体育锻炼能给生长骨骼的骨骺以适当刺激,⑧使骨头长得大而结实,④使人身材高大、强健。
⑤还能增强机体对疾病的抵抗力,⑥提高大脑的反应能力。
(1)标点不当的是句,修改:。
全国重点高中提前招生考试全真试卷(三)评讲
5.(雅礼中学初升高自主招生)如图3-5所示,一个竖直放置、开口向下的圆柱形玻璃 缸,全部浸没于水中,缸的上部留有适量的空气,恰好使玻璃缸处于悬浮状态。如果 施加外力,改变玻璃缸的深度,然后撤去外力,正确的结论是 ( C ) A.玻璃缸将上、下往复运动,最后回到原来的位置 B.如果施加的外力使玻璃缸的深度增大,撤去外力后, 玻璃缸将上浮并凸出液面 C.如果施加的外力使玻璃缸的深度减小,撤去外力后, 玻璃缸将上浮,直到液面 D.如果施加的外力使玻璃缸的深度减小,撤去外力后, 玻璃缸将下沉到底
【解析】据题述,第的热些胀程度比铁的大,要使温度升高时指针顺时针 偏转,双金属片的外层(图中较粗线所示)应是铜,内层(图中较细线所 示)应是铁,选项D说法不正确。
2.(四川成都七中2017年高中自主招生)如图3-2所示,A、B两块完全相同
的磁铁紧紧地吸在一起,静止放置在水平木地板上,忽略地磁场对它们的
【解析】如向下施加外力,使玻璃缸所处的深度增加,对玻璃缸内空气 的压强增大,使空气的体积被压缩,则它们排开水的体积减小,浮力减 小,而自重不变,使得浮力小于自重,所以玻璃缸会向下运动,直至下 沉到底;如向上施加外力,使玻璃缸所处的深度减少,对玻璃缸内空气 的压强减小,使空气的体积变大,则它们排开水的体积增大,浮力增大, 而自重不变,使得浮力大于自重,所以玻璃缸会向上运动,直至液面; 由上述分析可知,ABD错、C正确。
A.4m/s B.9 m/s C.12 m/s D.15 m/s
2012年重点高中提前招生英语模拟试题
2012年重点高中自主招生英语模拟试题(满分100分)一、单项选择(共20小题;每小题1分,满分20分)( )1. It is generally considered unwise to give a child he or she wants.A. howeverB. whateverC. whicheverD. whenever( )2. ---- May I have a look at the menu first? ---- Of course, __________, sir.A. don’t worryB. it doesn’t matterC. enjoy yourselfD. take yourtime( )3. I had to buy ______these books because I didn’t know which one was the best.A. bothB. noneC. neitherD. all( )4. It was the man ________ on the bed with his eyes open who _______ the book open on thedesk just now.A. lain; layB. lying; laidC. lay; layD. lying; lied( )5. The teacher told us _____________.A. light traveled as fast as soundB. light traveled faster than soundC. light travels as fast as soundD. light travels much faster than sound( )6. This is the most beautiful picture _______ I have seen.A. thatB. whichC. whoseD. what( )7. --Oh, you are here. I’m looking for you all the morning .________? --To the library.A. Where have you goneB. Where will you goC. Where are you goingD. Where have you been( )8. This T-shirt is very nice , but it ____ too much.A. spendsB. paysC. takesD. costs( )9. The naughty boys were made ____ their maths homework the next day.A. handing upB. hand outC. to hand inD. to handing off ( )10. Shanghai is larger than ________ in China.A. any cityB. all the citiesC. some other citiesD. any other city ( )11. Don’t think about it _______. I’m sure you will forget it _______.A. any more, long beforeB. any more, before longC. any longer, long agoD. any longer, long before( )12. _________, we would have finished the work on time.A. Had Jim comeB. Jim had comeC. If had Jim comeD. If Jim has come ( )13 .---Excuse me, where’s the West Hill Farm, please?---Go the forest and the foot of the mountain you will find it .A. through, atB. across, atC. through, underD. past, under( )14. The teacher said that she ____ us to the park the next day.A. will takeB. has takenC. would takeD. is taking( )15. I have never seen ______ beautiful place.A. so aB. a soC. such aD. a such( )16. The window is broken and needs ______. –I think so. They can hardly keep out thecold now.A. repairingB. to repairC. repairedD. be repaired( )17. There ____ a number of animals in the zoo. The number of them ____ two thousand.A. is, areB. are, isC. is, isD. are, are( )18._______ more time, he’ll make a first-class tennis player.A. Having givenB. To giveC. GivingD. Given( )19. ---Oh, I had a terrible toothache.---Y ou’d better _______ a doctor and have your bad to oth ____ out.A. to see; pullingB. see; pulledC. seeing, pullingD. saw; pulled( )20. -Y ou haven’t been to the West Lake in Hangzhou, have you?-______. How I wish to go there!A. Yes, I haveB. Y es, I haven’tC. No, I haveD. No, I haven’t二、完型填空(15分)阅读下面短文,掌握其大意,然后从短文后所给各题的四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项。
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2009年素质班模拟英语考试试卷温馨提示:1.本试卷分I卷(选择题)和第Ⅱ卷(非选择题)两部分。
共12页,七大题。
满分120分,考试时间120分钟。
2.第Ⅰ卷听力与选择题的答案,用铅笔在答题卡将答案代码涂满涂黑,多涂不给分。
第Ⅱ卷的答案用钢笔或圆珠笔写在答题卡上指定位置,只交答题卡。
第Ⅰ卷(共85分)第一部分听力测试Ⅰ听力(共二节,满分20分)第一节(共5小题,每小题1分,满分5分)听下面5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,并标在试卷的相应位置。
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。
1.What does Bill do now?A A teacherB A studentC A journalist2.Where did the conversation most probably take place?A On a busB In a libraryC In a dining room3.What day is it today?A TuesdayB WednesdayC Thursday4.What’s David’s hobby?A SportsB MusicC None5.How long did the meeting last?A One hourB Two hoursC Three hours第二节(共15小题,每小题1分,满分15分)听下面4段对话,每段对话后有几个小题,从题中所给的A.B.C三个选项中选出最佳选项,并标在试卷的相应位置,听每段对话前,你将有时间阅读各个小题,每小题5秒钟,听完后,各小题将给出5秒钟的作答时间,每段对话读两遍。
听第6段材料,回答6—7题6.What kind of music is mother listening to?A Rock musicB Country musicC Classical music7.What are the two speakers mainly talked about?A MusicB HomeworkC People 听第7段材料,回答8—10题8.Why doesn’tthe man buy the tickets this evening?A Because there are no tickets leftB Because it is too late to set offC Because the weather is too bad9. Which train will the man take?A.The 8:20 .train.B.The 9:15 train.C.The 12:30 train.10.How much does the man pay for the tickets in all?A.70 dollars.B.60 dollars.C. 50 dollars.听第8段材料,回答11-12题。
11.Why did Nancy call Bob?A.Because she wanted to get in touch with him.B.Because she wanted to tell him the good news.C.Because she wanted to invite him to a party.12.What were Nancy and Bob going to do evening?A.They wanted to see each other and discuss something.B.They wanted to go to a restaurant for dinner.C.They were going to a movie toghter.听第9段材料,回答13-15题。
13.What’s the probable relationship between the two speakers?A.Customer and manager.B.Shop assistant and manager.C.Customer and shop ower.14.Why was the man not polite to the customer?A.Because the customer didn’t buy anything.B.Because the customer didn’t like the bags he showed her.C.Because the customer threw the things about.15.What can we learn from the coversation?A.Customers should always be well treated.B.Customers are usually rude.C.Customers are ofen badly treated听最后一段材料,回答16-20题16.What kind of people do guide dogs help?A.Doctors.B.Solders.C.The blind.17.Whose pet dog was it?A.The doctor’s.B.The soldier’s.C.Dorothy’s.18.What kind of dogs are the best ones for the job?A.Strong.B.Bright.C.Old enough.19.When did Germany start a program to teach dogs to be guides?A.After Dorothy went to Germany.B.After Dorothy wrote about it for a magazine.C.After the doctor taught a dog to guide a person.20.How long does it take to train a little dog to be a guide?A.Over 2 years.B.14 months.C.4 weks.第二部分语言知识运用Ⅱ单项选择(共15小题,每小题1 分,满分15分)从A..B.C.D四个选项中选出可以填入空白处的最佳的答案。
21. I’m interested in____you have said.A all thatB all workC thatD which22. In our factory there are 2,000 workers,two thirds of_____are women.A themB whichC whomD who23. During the days _____,he worked as a servant at the Browns.A followedB followingC to followD that followed24. —We haven’t heard from Jane for a long time.—What do you consider _____to her?A was happeningB to happenC has happenedD happening25. Please remind me he said he was going . I may be in time to see him off .A whereB whenC howD what26. I thought her nice and honest I met you .A first timeB for the first timeC the first timeD by the first time27. got in to the room the telephore rong .A He hardly had , thenB Hardly had he , whenC He had not , thenD Not had he , when28. If you had spoken clearly you wouldA understand itB have understoodC be understoodD have been understood29. —Hey , look where you you are going !—Oh , I’m teribly sorry .A I’m not noticingB I was n’t noticing .C I haven’t noticedD I don’t notice .30. I can’t find the recorder in the room . It by somebody .A may have been take awayB may leaveC may take awayD must have take away31. Several new books were sold out last week .A of thousandB thousandsC thousands ofD thousand32. The pen me . It is hers .A isn’t belonged toB was belong toC doesn’t belong toD didn’t belog to33. The house wife had the meat several times to find out how muck it .A to weigh , was really weighedB weigh , was really weighedC weighed , really weighedD weigh , really weighed34. Mrs Brown the news that her daughter would marry Richarel .A gave outB gave offC gave awayD gave up35. In Disney cand , every year , some 800,000 plants are replaced because Disney refused tosigns asking his guests not to step on them .A put offB put downC put outD put onⅢ完形填空。