东北三省三校(哈师大附中、东北师大附中、辽宁省实验中学)2018届
(东三省三校)哈师大附中、东北师大附中、辽宁省实验中学2014年高三第二次联合考试物理答案
三校第二次模拟考试物理试题答案22、1.035 1.195(±0.002)(每空3分,共6分)23、乙(2分);22111U R N NR U =;(2分) (连线3分)N :V 1的总格数,N 1:V 1的读出格数,U 2:V 2的读数,R 1:待测表内阻,R 2:V 2表内阻。
(两个表内阻可以用150和30代替)(2分)24、(共14分))12(1.6)11(2)10(2)9(8.0)8(/530sin )7(5.0)6()5(2)4(64)3(2)2(/2)1(4321142322221211122s t t t t t t s a v t s a v t s m mmg a s t vt x x L x s av t m m x ax v s m a ma mg f =+++==∆==∆====∴=-===<=====总总返回传送带向右减速上升和下降时间在斜面上设达到共速μ (1)(3)各2分,其他每点各1分,总分14分25、(共18分)解析:(1)设粒子经PT 直线上的点R 由E 2电场进入E 1电场,由Q 到R 及R 到M 点的时间分别为t 2与t 1,到达R 时竖直速度为v y ,则:由F qE ma == 。
(1)2L= v 0t 2 。
(2)L= v 0t1。
(3)22221t mq E L = ∴ qL mv E 201= 。
(4) A1122t mq E t m q E v y == 21121t mq E MT =。
(5) 上述三式联立解得: L MT 21=。
(6) (4)(5)各2分,其他各1分,共8分(2)欲使粒子仍能从S 孔处射出,粒子运动的半径为r ,则rmv qvB 20=。
(7) ()1122n r a += 21,=n 。
(8) 解得:02(12)mv n B qa+= 21,=n 。
(9) 由几何关系可知T n T T n t )213()622(3+=+⨯⨯=。
【新课标卷】2024届高考押题卷-语文-答案解析
2024年高考语文临考押题卷01(新课标卷专用)(考试时间:150分钟试卷满分:150分)注意事项:1.答卷前,考生务必将自己的姓名、考生号等填写在答题卡和试卷指定位置。
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一、现代文阅读(35分)(一)(2024届东北三省三校(哈师大附中、辽宁省实验中学、东北师大附中)高三第二次联合模拟考试语文试题)现代文阅读Ⅰ(本题共5小题,17分)材料一:《红楼梦》后四十回续书作者问题不是“新闻”,实实在在是“旧闻”。
张庆善指出,早在2008年《红楼梦》新校本第三次修订出版时,就已经由“曹雪芹、高鹗著”改为“曹雪芹著,无名氏续,程伟元、高鹗整理”了。
张庆善认为曹雪芹其实把《红楼梦》写完了,理由是:从创作规律而言,曹雪芹创作《红楼梦》批阅十载,增删五次,纂成目录,分出章回,历时十年之久,不可能只写出前八十回就不再往下写了,翻来覆去只修改前八十回,这不符合创作规律;现有的大量脂砚斋批语,已经透露出八十回以后的情节,曹雪芹的亲友脂砚斋、畸笏叟都已经看到了这些稿子,如庚辰本第四十二回回前批:“钗玉名虽二个,人却一身,此幻笔也。
今书至三十八回时已过三分之一有余,故写是回,使二人合而为一。
请看黛玉逝世后宝钗之文字,便知余言不谬矣。
”曹雪芹《红楼梦》写完了,原稿八十回后为什么没有传下来?张庆善认为是《红楼梦》传阅时弄丢了。
曹雪芹逝世后,畸笏叟保存残稿,更不敢轻易拿去给别人看,怕再弄丢,最终八十回后的稿子也随着畸笏叟的去世而成了永远的谜案。
在曹雪芹逝世后的二三十年里,《红楼梦》都是以八十回本在社会上流传,直到1791年,程伟元、高鹗整理出版了一百二十回本《红楼梦》,才结束了《红楼梦》以八十回本流传的时代。
那么,《红楼梦》后四十回是从哪里来的?张庆善认为,后四十回是程伟元多年搜寻得来的,程伟元邀请高鹗帮助修订整理,高鹗欣然答应,“细加厘剔,截长补短”,依据就是程伟元、高鹗为程甲本、程乙本出版所写的序和引言。
东北三省三校(哈师大附中、东北师大附中、辽宁省实验
本试卷分第Ⅰ卷(阅读题)和第Ⅱ卷(表达题)两部分,其中第Ⅰ卷第三、四题为选考题,其它题为必考题。
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第Ⅰ卷阅读题甲必考题一、现代文阅读(9分,每小题3分)阅读下面的文字,完成1-3题。
经典的定义也无须再做论证,套用库切《何谓经典》中说的话,那些“历经最糟糕的野蛮攻击而得以劫后余生的作品就是经典”。
当然,撇开其讲演的特殊语境,那些历经后人最诚挚的颂扬而光景常新的作品,无疑也在其列。
越是越出惯常的理解,不能仅将经典局限在古今中外的文学名著上,许多人文社科类著作,包括一部分自然科学著作,因对人的处境有真切的关心,对人生在这个世界上的命运有深刻周彻的肯认,对人内心经验有感同身受的体谅,并精鹜八极,鞭辟入里,也都是经典,都应成为我们阅读的重点。
传统人文社科类经典大多着力于揭示人与世界的终极奥旨,字里行间,洋溢着个人与人类及宇宙深切的同体感。
那种既重视个体世间安顿,又时时仰望精神天空,不懈追索两者相携相成的执着与热忱,还有让一己放心落下的同时,努力让人类全体身心和谐的高尚追求,是人自身全部尊严的最好注释。
其中,作为“知识之王”的哲学经典,尤其具有范式意义,尤应认真阅读和了解。
一方面,它强调主体的自由出场和自我证明,故在根本处与文学艺术相近。
好的艺术经典以形象诠释人生,好的哲学经典(有时包括宗教经典)则以抽象演绎人生。
它们探讨的虽是“宇宙秩序”,但归结在“生活秩序”,面对同一个世界,回答同一个问题,所以可相资相益,相互参证。
东北三省三校(哈师大附中、东北师大附中、辽宁省实验
东北三省三校(哈师大附中、东北师大附中、辽宁省实验中学)2017届高三第三次模拟文综一、选择题1、《战国策》载:秦得蜀后,益富厚,倾诸侯,造成秦“富厚”的主要原因是()A、重大改革推动发展B、重要水利工程的修建C、中央集权制度建立D、与民休息政策的推行2、东汉时期,政府把国有的荒地和苑囿以及山林川泽租借给流民进行生产,农民在最初几年享受免除租税的待遇后,就要向国家缴纳百分之四十以上的赋税,并承担其他义务。
政府出台这一政策的根本目的是()A、治理流民问题B、防止小农破产C、缓解土地兼并D、增加财政收人3、太平兴国二年(977年),宋政府开始颁给州县官员格式固定的“历子”,令一一填写。
其内容包括户口税收、劝课农桑、兴修水利、招诱流民、公平执法、摒除盗贼等项目。
任满时携至京师,以,为年终考核及终任以后赏罚升黜之凭据,“敢有妄书功劳”者皆予除名。
据此可知()A、完善地方考核利于中央集权B、廉政与监察是强化皇权的关键C、制度的创新受到时代的局限D、保护小农经济是政策的出发点4、乌青镇(乌镇)南北各与钱塘江和太湖相通,又与京杭大运河相贯连。
明成化、弘治年间,“宛然府城气象”,清乾隆朝乌镇“升平既久,户口日繁”,成为江南市镇中人口最多的大市镇之一。
乌镇发展的主要条件是()A、长途贩运贸易发达B、农产品商品化程度高C、纺织业发展最迅速D、政府赋税重要来源地5、严复提到:在生物界里,开放的“四达之地”的物种,有较强的竞争力,而与世隔绝的“孤悬岛国”的物种,一旦有“外种闯入,新竞更起,往往年月以后,旧种渐湮,新种迭盛。
此自舟车打通之后,所特见屡见不一者也。
”这一思想()A、否定了儒家思想的正统地位B、冲击了夷夏大防的排外思想C、宣传了君主立宪的政体模式D、带动了民主革命意识的传播6、在1929年中国共产党制定的《兴国土地法》中,把1928年制定的《井冈山土地法》中规定“没收一切土地归苏维埃政权所有”的内容,改为“没收一切公共土地及地主阶级的土地归兴国工农兵代表会议下政府所有”。
东北三校(哈师大附中、东北师大附中、辽宁省实验中学)2011届高三理综第二次联合考试【会员独享】
第二次模拟考试答案_物理(2)A D (2分,各1分) 23.(1)R 2(3分) (2)3A (0~3A )(3分) (3)(3分)限流供电,r2与电压表串联测电压,电流表内接 (4)12.0(2分) 24. 解分)(分)(分)分)(分)分))(分)分)分)分)(2242BC 11(222tan /H 1(1(21H 21(2P 2(P 1(2)2(21122h x vt x ght x vt x gt gh m g m gv gh v m v m gh m m ===========θ25. 解(1)由于带电粒子偏转,PQ 极板上将带上电荷,设电压为U ,则极板MN 间的电压也为U ,当带电粒子在PQ 极板间做匀速运动时,有q dU B qv =10,(2分) 若在荧光屏Y 上只有一个亮点,则负电荷不能通过极板MN 。
2021mv Uq ≥,(2分) 解得mqdB v 102≤(2分) (2)荧光屏上有两个亮点,则mqdB v 102>(2分),在此条件下, q dUB qv =10,得01v dB U =对正电荷,设到达B 2中后速度为1v ,则20212121mv mv Uq -=(2分) 设做圆周运动的半径为R 1,则12121R mv B qv =,(2分)得mqv dB mv qB mR 0120212+=对负电荷,设到达B 2中后速度为2v ,则20222121mv mv Uq -=-(2分) 设做圆周运动的半径为R 2,则22222R mv B qv =,(2分)得mqv dB mv qB mR 0120222-=所以,正、负两种电荷形成的亮点到荧光屏上小孔的距离之比为qv dB m v qv dB m v R R d d 0120012021212222-+==(2分) 33.(1)BD(2) (1)活塞刚离开卡口时,对活塞mg +P 0S =P 1S 得P 1 =P 0+mgS(2分)两侧气体体积不变,右管气体 P 0T 0=P 1T 1得T 1=T 0(1+mgP 0S ) (3分)(2)左管内气体,长度为L 23,压强为:P 2= P 0+mg S +ρgL (2分)应用理想气体状态方程2023T SL P T LSP = 得T 2=3T 02P 0(P 0+mg S +ρgL )(3分)34.(1)B (2)解分)(分2/103/)3(8s m v nc v v cn ⨯===S=362L π (5分)35. (1)BCD(2)解:(1)当弹簧再次恢复原长时a 滑块的速度达到最大, 设a 滑块的最大速度为1v ,a 滑块能达最大速度时b 滑块的速度为2v 由题意得:02v m I = ①112202v m v m v m += ②211222202212121v m v m v m += ③ 解得:210212122m m Iv m m m v +=+=④ (2)两滑块间有最大距离时,两滑块的速度相等。
东北三省三校2018届高三第三次联合模拟考试英语试卷(含答案)
2018届东北三省三校(哈师大附中,东北师大附中,辽宁省实验中学)高三第三次模拟考试英语试题第一部分听力(共两节, 满分30分)第一节(共5小题;每小题1. 5分,满分7. 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。
例:How much is the shirt?A. £19.15.B. £9.15.C. £9.18.答案是C。
1. What is the weather like today?A. Cool.B. Warm.C. Hot.2. What does the man want?A. A one-dollar bill.B. Some coins.C. A parking place.3. What are the speakers discussing?A. Whether to hire more workers.B. How to improve production.C. When to put the new orders.4. Where are the speakers?A. In a park.B. In a lift.C. On a bus.5. What has the woman done?A. She has changed her car for a new one.B. She has taken a new car for a test drive.C. She has finished recording a radio program.第二节(共15小题;每小题1. 5分,满分22. 5分)听下面5段对话或独白。
每段对话或独白后有几个小题,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。
黑龙江哈师大附中、东北师大附中、辽宁省实验中学高三数学第一次联考 理
2011年东北三省三校第一次联合模拟考试理科数学参考答案二、填空题: 13、14-14、540- 15、1 16、8 三:解答题:18、(1)连接1AC 交1AC 于点O ,连OD1111111O AC 1OD//BC ,OD=BC 2 AB BC A CD ACC A D ⎫⇒⎬⎭⊄中,为中点为中点平面111BC //4' OD A CD ACD ⎫⎪⎪⇒⎬⎪⎪⊂⎭平面平面(2) 延长1A D 交1BB 延长线于E ,则111A D BBC C 平面=E取11B C 中点F ,连1,A F EF11111111111111ABC A B C A F B C A F BB C C6'A B C BB C C -⇒⊥⎫⇒⊥⎬⊥⎭在三棱柱中平面 平面平面111EF A E BB C C ⇒为在平面内的射影1111E A E BB C C 8'A F ∴∠为与平面成的角在正1111111A B C B C 1,A F=A 2BC ∆==中故: 17RT A EF EF=2∆在中1cos EF AEF A E ∠==111A D BB C C 12'故与平面19、(1)30位亲属中50岁以上的人多以食蔬菜为主2'50岁以下的人多以食肉为主4'8'2230(8-128)30120120K ===10>6.6351218201012182010⨯⨯⨯⨯⨯⨯⨯⨯10'有99%的把握认为亲属的饮食习惯与年龄有关。
12'20、(1)设(2cos ,2sin ),(cos ,sin )P Q αααα由N PM QN PM=0QN PM PN PM λ=⋅⊥知在上,由知N (2c o s,s i n )αα∴{s i n y αα=x=2cos 即:2214'4x y ∴+=(2) 联立方程2222221(41)2436404(3)x y k x k x k y k x ⎧+=⎪⇒+++-=⎨⎪=+⎩2106'5k ∆>⇒<22212121212122224364, y y [3()9]8'4141k k x x x x k x x x x k k -+=-⋅==⋅+++++121212()1BE BF x x x x y y ⋅=⋅-+++222222227(1)4(91)(31)(24)699291(1)10'14144k k k k k k k -+-+--=++=+++由210< BE BF [3,6)12'5k ≤∴⋅∈-21、(1)()(),ln()ln()x x f x f x e a e a --=-∴+=-+-x -x x x1e (e e )0 01'e a a a a a∴+=⇒++=∴=+()g(x)=x+sinx [-1,1]f x x λ∴=,且在递减'()cos 0[1,1]2'g x x x λ∴=+≤∈-在上恒成立λ∴≤-cosx 1A =(--λ∴≤-∞即:,] (2) max 1[1,1]()1t x g x t λλ≤++∈-⇔≤++22g(x)t 在恒成立t 恒成立2max ()(1) sin1 1 1g x g t t λλλ=-∴--≤++≤-对任意恒成立5'即: 2(t+1)+t 1sin10 1λλ++≥≤-对任意恒成立 故,{11st ≤⇒≤++2t +-1-t+t 7'(3) 222ln ln (2)()xx x x ex m x e m e x=-+⇔=-+- 令22ln () ()()xh x x x e m e xφ==-+-,21l n 1'() ()(0e )(e ,+) ()xh x h x h ex e-=∴∞∴==max 在,递增,递减h(x)9'2m i n ()(e ,+) (x )x m eφφ∞=-为二次函数在(0,e)递减,递增, 22222211, 11= =, 111< <, 2m e m e e e m e m e e e m e m e e e∴->>+-+-+即:无解即:解即:解12'22、解:(Ⅰ)︒=∠=∠90PKQ PHQ∴四点P 、K 、H 、Q 共圆.2'(Ⅱ) 四点P 、K 、H 、Q 共圆,HQP HKS ∠=∠∴①4'︒=∠90PSR ,PR 为圆的直径,90PQR ∴∠=︒,HQP QRH ∠=∠ ②6'由①②得,H Q S P ∠=∠,TKSK =∴8'又︒=∠90SKPTKQSQK ∠=∠,TS QT TK QT =∴=∴,.10'23、(1)直线l的方程:11(y x -=-+即:y=-x 1'240y x ρθ+-=2C:=4cos 即:x 2'40x -=2联立方程得: 2x7 A (0,0) ,B (2,-2)0,0),B (22,)4π∴极坐标5'22(2) 1 : :(2)431 08'4d l y x C x y k k ===--+=∴=∴==或{4x =-1-51()()1315t x tl t t y y t⎧⎪⎪=-+∴⎨=⎪=+⎪⎩:为参数或为参数10'24、 2121413x x x ≥⇒++≥⇒-≤≤2(1) |x+1|2|x|x 1[,1]3∴-解集为4'(2) 存在|x+1|2|x|+a x R |x+1|-2|x|a x R ∈≥∴∈≥使存在使 令6'1 0()3 1 -101 1x x x x x x x ϕ-≥⎧⎪=+≤<⎨-<-⎪⎩8'当0 1 -10-2y<1; x<-1x x ≥≤≤<≤时,;时,时,y<-2 综上可得:()1x ϕ≤ 1.a ∴≤10'。
高中化学离子方程式试题.docx
离子方程式1.( 2018 届天津市河西区高三第三次模拟考试)下列各组离子能大量共存,且当加入试剂后反应的离子方程式书写正确的是()选项离子组加入试剂发生反应的离子方程式A3+-、 Cl-NaOH 溶液3++ 3OH-=Fe(OH) 3↓Fe、 I FeB K +、 ClO -、 SO42-盐酸H+ +ClO - =HClOC K +、 OH -、 Cl -过量 SO2SO2+ OH -=HSO 3-DH+、 Fe2+、 SO42-3 2 溶液SO42-+ Ba 2+ =BaSO4↓Ba(NO )2.( 2018 届江苏省盐城市高三第三次模拟考试)下列指定反应的离子方程式正确的是()A. MnO 2与浓盐酸混合加热:MnO 2+4H ++4Cl -MnCl 2+Cl 2↑O+2H--B. NaAlO 2溶液中通入过量 CO2: AlO 2 +CO 2+2H 2O=Al(OH) 3↓+HCO3C. FeSO4溶液中加入盐酸酸化的H 2O2:Fe2++H 2O2+2H +=Fe3++2H 2OD. Ca(HCO 3)2溶液中加入过量氨水: Ca2+-↓ +H++HCO 3 +NH 3·H2O=CaCO 32O+NH 43.( 2018 届江苏省苏锡常镇四市高三调研)下列指定反应的离子方程式正确的是A. 氯气通入水中+--: Cl 2+H 2O2H +Cl +ClOB. 向苯酚浊液中滴加Na2CO3溶液 :2C6H5OH+CO 32- =2C6H 5O-+H 2O+CO 2↑C. 向偏铝酸钠溶液中加入--2-NaHCO 3溶液 : AlO 2+HCO 3 +H 2O=Al(OH) 3↓ +CO3D. 碳酸氢铵溶液中加入足量NaOH 溶液共热 : NH 4+ +OH -NH 3↑ +H2O4.( 2018 届江苏省南通市高三第三次调研测试)下列指定反应的离子方程式正确的是A. 电解熔融NaCl : 2Cl-+2H 2O2OH -+ Cl 2↑+ H 2↑B.用氨水溶解 AgCl 沉淀: Ag ++ 2NH 3·H 2O= [Ag(NH 3 )2] ++ 2H 2OC.Na2CO3溶液吸收溴蒸气: 3CO32-+ Br 2=Br -+ BrO 3-+ 3CO2D.金属钠与水反应: 2Na+ 2H 2O= 2Na++ 2OH -+ H2↑5.(江苏省南京市2018 届高三第三次模拟考试)常温下,下列各组离子在指定溶被中一定能大量共存的是3+2+--A. 澄清透明的溶液中: Fe ,Ba、 NO 3、 ClB. 使酚酞变红色的溶液中:Na+、 NH 4+、 C1-、 SO42-C. c(Al 3+)=0.1mol/L的溶液中 :K +、 Mg 2+、 SO42-、 AlO 2-D. 由水电商产生的c(H + )=10-13mol/L 的溶被中 :K +、 Na+、CH 3COO -、 NO 3-6.( 2018 届江苏省南京市高三第三次模拟考试)下列指定反应的离子方程式正确的是A. 将饱和 FeCl3溶液滴入沸水中制备3++ Fe(OH) 3胶体: Fe +3H2O=Fe(OH) 3↓+3HB. 向硫酸铝溶液中滴加过量氨水:2Al3++6NH 3·H 2O=2Al(OH)↓ +6NH+34C. 向 Na ClO 溶液中通入过量的 SO2: SO2+ClO -+H 2O=HSO 3- +HClOD. 向 (NH 4)2Fe(SO4 )2溶液中滴加过量2+-NaOH 溶液: Fe +2OH =Fe(OH) 2↓7.( 2018 届山东省泰安市高三第二次模拟考试)下列有关离子方程式或离子共存的叙述正确的是A. 用肥皂 (主要成份C17H 35COONa) 水检验含有较多钙离子的硬水:2C17H 35COO -+Ca2+===(C 17H35COO)2Ca↓B.将磁性氧化铁溶于氢碘酸: Fe3O4 +8H +=2Fe3++Fe2++4H 2OC.常温下,在=0.1 的溶液中: Na+、 K +、 SO42-、 HCO 3-能大量共存D.在 NaC1O 溶液中: SO32-、 OH -、 C1-、 K +能大量共存8.( 2018 届江苏省泰州中学高三下学期学业水平测试模拟三)下列反应的离子方程式书写正确的是A. 过量 SO2通入氢氧化钙溶液中:﹣﹣OH+SO 2═ HSO3+2+B.碳酸钙与足量醋酸反应: CaCO3+2H ═ Ca +H 2O+CO 2↑C.氯化铝溶液与过量氨水反应: Al 3++4NH 3?H2 O═ AlO2﹣ +4NH 4++2H 2O+3+D.铁与稀硫酸溶液反应: 2Fe+6H ═ 2Fe +3H 2↑9.( 2018 届湖北省荆州中学高三 4 月月考)下列解释事实的方程式正确的是()A. 电解饱和食盐水,产生黄绿色气体:2NaCl + 2H 2O2NaOH + H 2↑ + Cl2↑B. 用 Na2CO3溶液将水垢中的CaSO4转化为 CaCO3: CO32- + Ca2+ ==== CaCO 3↓C. 浓氨水检验泄露的氯气,产生白烟:2NH 3 + 3Cl 2 === 6HCl + N 2D. 铜丝溶于浓硝酸生成绿色溶液:3Cu + 8H + + 2NO 3-3Cu2+ + 2NO↑ + 4H2O10.( 2018 届福建省厦门市双十中学高三第八次能力考试)工业碳酸钠 (纯度约为 98%)中含有 Mg 2+2+、、FeCl-和 SO42-等杂质,提纯工艺流程如下:下列说法不正确的是...A.步骤①,通入热空气可加快溶解速率2+3+-↓ + Fe(OH)↓B. 步骤②,产生滤渣的离子反应为:Mg+ Fe+ 5OH == Mg(OH) 23C.步骤③,趁热过滤时温度控制不当会使Na2CO3?H2O 中混有 Na2CO3?10H2O 等杂质D.步骤④,灼烧时用到的主要仪器有铁坩埚、泥三角、三脚架、酒精灯11.( 2018 届湖南省衡阳市第八中学高三第三次质检)向FeCl3、Al2(SO4)3的混和溶液中逐滴加入Ba(OH) 2(aq),形成沉淀的情况如下图所示。
重磅!2018沈阳中考各初中喜报来啦!看看哪所学校最强?
重磅!2018沈阳中考各初中喜报来啦!看看哪所学校最强?很荣幸,各位帅哥美⼥都来关注沈阳⽹⼩编微信号:254071148 你敢不敢调戏2018年沈阳中考终于落下帷幕这⼏天陆续有好消息传来祝贺!这是属于咱沈阳学⼦的⼀次集体⼤成功好家风沁润好⼉孙好榜样才能引领好风尚各个热点学校考的都怎么样你家学区的初中实⼒强不强赶紧⼀起来看看吧别忘拉到底部为你母校投票庆祝(以下排名不分先后)更多学校⼩编将陆续为您收集奉上▼★南昌中学★九年⼆班⽥⽂博中考成绩731,被辽宁省实验中学录取;九年⼆班李嘉⾥中考成绩731分被辽宁省实验中学录取;九年五班王思博中考成绩:731分,被东北育才科学⾼中录取。
★七中★2018年中考,沈阳七中在参考⼈数只有732⼈,⽐往年减少约400⼈的情况下(全市参考⼈数45566⼈),全市前⼗名(因并列共计13⼈)独占七⼈,分别是九年⼆班刘曜铭734分,九年⼆⼗班王韵雯734分,九年⼗四班李勃霏733分,九年五班刘展旭732分,九年⼗⼀班韦玮731分,九年⼗九班王⼒萱731分,孙铭⾠731分(东校),另外,九年七班柳林730分,九年⼗⼆班林湫童730分,730分以上全校多达9⼈!全市前100名32⼈(东校2⼈),全校720分以上53⼈(东校4⼈),全市226⼈,占近四分之⼀,全校710分以上147⼈(东校16⼈),全市832⼈,约占全市18%,700分以上268⼈(东校48⼈),全市1948⼈,约占全市总数14%★虹桥中学★★杏坛中学★学校456名考⽣中,720分以上2⼈;704分(预测三校最低分数线)以上34⼈,所占⽐例远远超出全市平均值;700分以上44⼈,占学校报考⼈数近10%;680分(相当于2017年中考705分)以上⼈数约占学校报考⼈数三分之⼀。
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2019年高考地理考点一遍过考点20 河流侵蚀地貌与堆积地貌 含解析
考点20 河流侵蚀地貌与堆积地貌考点热度★★★★☆1.河流侵蚀地貌河流在流动过程中,会破坏和搬运地表物质,形成侵蚀地貌。
〖技巧点拨〗如何分析河水对两岸的侵蚀作用?若河道平直,河水对两岸的侵蚀作用要考虑地转偏向力,即北半球右岸侵蚀、左岸堆积,南半球左岸侵蚀、右岸堆积。
若河道弯曲,河水对两岸的侵蚀作用要考虑凹岸侵蚀,凸岸堆积。
2.河流堆积地貌被河流搬运的物质,在河流搬运能力减弱的情况下,会沉积下来,形成沉积地貌。
〖特别提示〗河流堆积地貌不仅存在于河流中下游地区,当河流冲出山口时,由于地势逐渐趋向平缓,水流速度放慢,河流搬运的物质堆积下来,形成洪(冲)积扇,多个洪(冲)积扇连接形成洪积—冲积平原。
[图文拓展]1.洪积—冲积平原地貌以谷口为顶点呈扇形,冲积扇顶端到边缘地势逐渐降低,堆积物颗粒由粗变细。
2.三角洲地貌多呈三角形,地势平坦,河网稠密,河道由分汊顶点向海洋呈放射状。
考向一不同河段河流地貌的类型及成因读下面两幅图,完成1—3题。
1.图示河流地貌形成的原因,主要是河流的①侵蚀作用②搬运作用③溶蚀作用④堆积作用A.①②B.②④C.②③D.①④2.乙图所示地形剖面对应甲图中的A.①④B.②④C.①③D.③④3.河谷从发育初期到成熟期,下列说法正确的是A.河流的侧蚀作用减弱,下蚀作用加强B.河流在凹岸堆积,在凸岸侵蚀C.河湾不断地向两侧扩展,使河谷展宽D.河谷横剖面由“U”形变为“V”形。
【答案】1.D 2.C 3.C考向二河流流向的判断1.根据一条等高线,判定河流流向河流在山谷中流动,河流流经处的地势比两侧低。
只要知道一条等高线的弯曲状况,就可以确定河流的流向,即河流流向与等高线的弯曲方向相反。
2.根据湖泊或水库上下游的水位变化曲线判定河流流向湖泊或水库对河流径流有调节作用,所以湖泊或水库下游的河流年径流量比较稳定,水位变化曲线的起伏较小。
3.根据河床的深浅判定河流流向在河岸弯曲处,受水流的冲刷,凹岸河床较深,而凸岸往往形成河漫滩,即河床较浅;在河岸平直处,受地转偏向力的作用,北半球右岸河床较深,左岸则较浅,南半球正好相反。
东北三省三校(哈师大附中、东北师大附中、辽宁省实验中学)2018届高三第三次模拟考试语文试题
【题文】阅读下面的材料,根据要求写作。
在互联网+的时代,站在这个瞬息万变的美丽新世界的入口,人人都害怕被时代悄无声息地抛弃或遗忘,于是我们看到微信群里风起云涌,朋友圈里一切皆可晒,说说空间微博分秒必争高效刷屏,各种自拍照片小视屏充斥网络,点赞评论互动乐此不疲……不少人纷纷用视觉的冲击祈求他人的驻足回眸。
“存在感”这个词一夜而火。
对于上述社会现象,有人说存在感是人的本能需求,人人都需要被重视和认可,并得到社会的广泛关注,这无可非议;有人说“为了获得认可,个体愿意抛弃是非,用智商去换取那份让人备感安全的存在感”;还有人说,真正的存在感不是刷出来的,是来自于强大而自信的内心,如果内心丰盈充实,自然就不会过度寻求别人的关注。
对此你有什么思考,请结合出来内容及含义作文。
要求自选角度,明确文体,自拟标题,不要套作,不得抄袭,不少于800字。
【答案】存在感谁是中国最可怜的人?孔子。
鲁迅在《在现代中国的孔夫子》一文中将“可怜”二字送给了孔子。
孔夫子的角色一度地被揉捏、涂抹以至变形、神化,伴随而来的还有他无所不在的“存在感”。
乃至到今日,这种“存在感”仍居高不下,甚至愈演愈烈。
从一座座新建的孔庙,到课本中越来越多的儒家经典,再到在国外炒的红火的孔子学院,无处不彰显其“存在感”。
可我想,这种浮于表面的存在感,终究还是走不到人们心里去的吧。
存在感,单从整个词来看,可能就显得有些空洞了。
但若用拆字法来理解,或许还是重“感”不重“在”的。
当一种精神、一种思想、一个人,不再被泛泛而谈而是被潜藏内心,那么他就有了存在感。
王开玲曾经说过一句话,“容颜易摹,心灵却难以作弊”,大概就是这种意思了。
到现在我仍记得《只缘身在此山中》的一句话:我心愿自己是个无面目的人,来此问清自己的面目。
很多人都会习惯性地模糊了存在的概念,那就更不用谈相对空泛的存在感了。
一个不知道自己为何而存在的人,是绝没有可能拥有存在感的。
当然,我今天并不是来谈论我们为何存在的,但却只有明了自己为何而存在,才能有机会拥有存在感。
东北三省三校(哈师大附中)2018-2019学年高三第二次模拟考试数学(理)试题+Word版含答案
东北三省三校(哈师大附中、东北师大附中、辽宁省实验中学)2018-2019学年高三第二次模拟考试数学(理)试题第Ⅰ卷(共60分)一、选择题:本大题共12个小题,每小题5分,共60分.在每小题给出的四个选项中,只有一项是符合题目要求的. 1.设i 是虚数单位,则复数ii437++在复平面内所对应的点位于( ) A .第一象限 B .第二象限 C .第三象限 D .第四象限 2.设集合}02|{2<--=x x x A ,集合}41|{<<=x x B ,则=B A Y ( ) A .}21|{<<x x B .}41|{<<-x x C .}11|{<<-x x D .}42|{<<x x3.等比数列}{n a 中,23-=a ,811-=a ,则=7a ( ) A .4- B .4 C .4± D .5- 4.已知向量)1,1(=a ,)2,1(-=b ,若)2//()(b t a b a +-,则=t ( )A .0B .21C .2-D .3- 5.执行如下的程序框图,若输出T 的值为1225,则“?”处可填( )A .6<nB .5<nC .4<nD .3<n6.将7个座位连成一排,安排4个人就座,恰有两个空位相邻的不同坐法有( ) A .240 B .480 C .720 D .960 7.函数11)(+-+=x x e x f x的部分图象大致是( )8.《九章算术》中,将底面是直角三角形的直三棱柱称之为“堑堵”,已知某“堑堵”的三视图如图所示,则该“堑堵”的外接球的表面积为( )A .338π B .π8 C .π6 D .334π9.21,F F 是双曲线)0,0(12222>>=-b a by a x 的左右焦点,过1F 且斜率为1的直线与两条渐近线分别交于B A ,两点,若12=,则双曲线的离心率为( ) A.25B. 5C.310D. 10 10.设n m ,是两条不同的直线,βα,是两个不同的平面,则下列命题中正确的是( ) A .若βα⊥,α⊥m ,则β//m B .若α//m ,α⊂n ,则n m // C .若m =βαI ,α//n ,β//n ,则n m //D .若βα⊥,且m =βαI ,点α∈A ,直线m AB ⊥,则β⊥AB11.甲、乙、丙、丁四位同学参加比赛,只有其中三位获奖.甲说:“乙或丙未获奖”;乙说:“甲、丙都获奖”;丙说:“我未获奖”;丁说:“乙获奖”.四位同学的话恰有两句是对的,则( )A .甲和乙不可能同时获奖B .丙和丁不可能同时获奖C .乙和丁不可能同时获奖D .丁和甲不可能同时获奖 12.已知当),1(+∞∈x 时,关于x 的方程1)2(ln -=-+kxk x x 有唯一实数解,则k 值所在的范围是( )A .)4,3(B .)5,4(C .)6,5(D .)7,6( 二、填空题(每题4分,满分20分,将答案填在答题纸上) 13.设随机变量)21,6(~B X ,则==)3(X P .14.已知递增的等差数列}{n a 的前三项和为6-,前三项积为10,则前10项和=10S .15.函数43cos 3)3sin(cos )(2+-+=x x x x f π在闭区间]4,4[ππ-上的最小值是 .16.设抛物线x y 22=的焦点为F ,过点)0,3(M 的直线与抛物线相交于B A ,两点,与抛物线的准线相交于点C ,2||=BF ,则BCF ∆与ACF ∆的面积之比=∆∆ACFBCFS S . 三、解答题 (本大题共6题,共70分.解答应写出文字说明、证明过程或演算步骤.) 17.已知ABC ∆三个内角C B A ,,所对的边分别是c b a ,,,若)sin (sin )sin )(sin (B A b C A c a -=+-.(1)求角C ;(2)若ABC ∆的外接圆半径为2,求ABC ∆周长的最大值.18.经调查,3个成年人中就有一个高血压,那么什么是高血压?血压多少是正常的?经国际卫生组织对大量不同年龄的人群进行血压调查,得出随年龄变化,收缩压的正常值变化情况如下表:其中:xb y a xn x yx n yx bn i i ni ii ˆˆ,ˆ1221-=⋅-⋅⋅-=∑∑==,∑==81217232i i x ,∑==8147384i ii y x(1)请画出上表数据的散点图;(2)请根据上表提供的数据,用最小二乘法求出y 关于x 的线性回归方程a x b y ˆˆˆ+=;(b aˆ,ˆ的值精确到0.01)(3)若规定,一个人的收缩压为标准值的0.9~1.06倍,则为血压正常人群;收缩压为标准值的1.06~1.12倍,则为轻度高血压人群;收缩压为标准值的1.12~1.20倍,则为中度高血压人群;收缩压为标准值的1.20倍及以上,则为高度高血压人群.一位收缩压为180mmHg 的70岁的老人,属于哪类人群?19.如图,四棱柱1111D C B A ABCD -的底面为菱形,0120=∠BAD ,2=AB ,F E ,为1,AA CD 中点.(1)求证://DF 平面AE B 1;(2)若⊥1AA 底面ABCD ,且直线1AD 与平面AE B 1所成线面角的正弦值为43,求1AA 的长.20.椭圆C :)0(12222>>=+b a by a x 的左、右焦点分别为)0,1(1-F 、)0,1(2F ,若椭圆过点)23,1(. (1)求椭圆C 的方程;(2)若B A ,为椭圆的左、右顶点,),(00y x P (00≠y )为椭圆上一动点,设直线BP AP ,分别交直线l :6=x 于点N M ,,判断线段MN 为直径的圆是否经过定点,若是,求出该定点坐标;若不恒过定点,说明理由.21.已知函数1ln )(--=x a x x f ,曲线)(x f y =在)0,1(处的切线经过点)0,(e . (1)证明:0)(≥x f ;(2)若当),1[+∞∈x 时,xp x x f ln )(ln )1(2+≥,求p 的取值范围.请考生在22、23二题中任选一题作答,如果都做,则按所做的第一题记分. 22.选修4-4:坐标系与参数方程在直角坐标坐标系xOy 中,曲线1C 的参数方程为⎩⎨⎧+==θθsin 1cos y x (θ为参数),曲线2C :1222=+y x .以O 为极点,x 轴的非负半轴为极轴,与直角坐标系xOy 取相同的长度单位,建立极坐标系.(1)求曲线21,C C 的极坐标方程;(2)射线3πθ=(0>ρ)与曲线1C 的异于极点的交点为A ,与曲线2C 的交点为B ,求||AB .23.选修4-5:不等式选讲 设函数|12|)(-=x x f .(1)设5)1()(<++x f x f 的解集为集合A ,求集合A ;(2)已知m 为集合A 中的最大自然数,且m c b a =++(其中c b a ,,为正实数),设ccb b a a M -⋅-⋅-=111.求证:8≥M .理科数学答案一、选择题二、填空题 13.165 14. 85 15.21- 16. 54 三、解答题17.(1)由正弦定理得)())((b a b c a c a -=+-,∴222b abc a -=-,∴212222=-+ab c b a ,即21cos =C 因为π<<C 0,则3π=C .(2)由正弦定理4sin sin sin 2====AaB bC c r ∴A a sin 4=,B b sin 4=,32sin 4==C c , ∴周长c b a l ++=32sin 4sin 4++=B A32)32sin(4sin 4+-+=A A π32sin 214cos 234sin 4+⨯+⨯+=A A A 32cos 32sin 6++=A A32)6sin(34++=πA∵)32,0(π∈A ,∴)65,6(6πππ∈+A ∴当26ππ=+A 即3π=A 时363234max =+=l∴当3π==B A 时,ABC ∆周长的最大值为36.18. (1)(2)4586258524842383228=+++++++=x1298147140135129127122118114=+++++++=y∴91.012911845817232129458473848ˆ2812281≈=⨯-⨯⨯-=⋅-⋅⋅-=∑∑==i ii ii xxy x n yx b05.884591.0129ˆˆ=⨯-=-=x b y a∴回归直线方程为05.8891.0ˆ+=x y. (3)根据回归直线方程的预测,年龄为70岁的老人标准收缩压约为75.15105.887091.0=+⨯(mmHg )∵19.175.151180≈∴收缩压为180mmHg 的70岁老人为中度高血压人群. 19.(1)证明:设G 为1AB 的中点,连GF EG , 因为FG1121B A ,又DE 1121B A ,所以FG DE ,所以四边形DEGF 是平行四边形, 所以EG DF //又⊄DF 平面AE B 1,⊂EG 平面AE B 1, 所以//DF 平面AE B 1.(2)因为ABCD 是菱形,且060=∠ABD , 所以ABC ∆是等边三角形 取BC 中点G ,则AD AG ⊥,因为⊥1AA 平面ABCD , 所以AG AA ⊥1,AD AA ⊥1建立如图的空间直角坐标系,令)0(1>=t t AA ,则)0,0,0(A ,)0,23,23(E ,),1,3(t B -,),2,0(1t D , )0,23,23(=AE ,),1,3(1t AB -=,),2,0(1t AD =, 设平面AE B 1的一个法向量为),,(z y x n =, 则0)3(23=+=⋅y x AE n 且031=+-=⋅tz y x , 取)4,,3(t t n -=,设直线1AD 与平面AE B 1所成角为θ, 则43)4(26||||sin 211=+=⋅=t t AD n θ,解得2=t ,故线段1AA 的长为2. 20.(1)由已知1=c , ∴122+=b a ① ∵椭圆过点)23,1(,∴149122=+b a ② 联立①②得42=a ,32=b∴椭圆方程为13422=+y x(2)设),(00y x P ,已知)0,2(),0,2(B A - ∵00≠y ,∴20±≠x ∴BP AP ,都有斜率 ∴2,20000-=+=x y k x y k BP AP ∴4202-=⋅x y k k BPAP ③ ∵1342020=+y x ∴)41(3220x y -=④ 将④代入③得434)41(32020-=--=⋅x x k k BPAP设AP 方程)2(-=x k y ∴BP 方程)2(43--=x k y ∴)3,6(),8,6(kN k M -由对称性可知,若存在定点,则该定点必在x 轴上,设该定点为)0,(t T 则TM ⊥ ∴0)24()6()3,6()8,6(2=-+-=--⋅-=⋅t k t k t∴24)6(2=-t ,∴626±=t ∴存在定点)0,626(+或)0,626(-以线段MN 为直径的圆恒过该定点.21. (1)曲线)(x f y =在)0,1(处的切线为)1)(1('-=x f y ,即)1)(1(--=x a y 由题意得)1)(1(0--=e a ,解得1=a所以1ln )(--=x x x f 从而xx x x f 111)('-=-= 因为当)1,0(∈x 时,0)('<x f ,当),1(+∞∈x 时,0)('>x f .所以)(x f 在区间)1,0(上是减函数,区间),1(+∞上是增函数,从而0)1()(=≥f x f .(2)由题意知,当),1[+∞∈x 时,0ln ≠+x p ,所以0>p从而当),1[+∞∈x 时,0ln >+x p , 由题意知xp x x x ln )(ln 1ln 12+≥-+,即0ln ]1)1[(≥+-+-p px x x p ,其中),1[+∞∈x 设p px x x p x g +-+-=ln ]1)1[()(,其中),1[+∞∈x设)(')(x g x h =,即11)1()(-+-=x x p x h ,其中),1[+∞∈x 则21)1()('xx p x h --=,其中),1[+∞∈x (1)当2≥p 时,因为),1(+∞∈x 时,0)('>x h ,所以)(x h 是增函数从而当),1(+∞∈x 时,0)1()(=>h x h ,所以)(x g 是增函数,从而0)1()(=≥g x g .故当2≥p 时符合题意.(2)当21<<p 时,因为)11,1(-∈p x 时,0)('<x h , 所以)(x h 在区间)11,1(-p 上是减函数 从而当)11,1(-∈p x 时,0)1()(=<h x h 所以)(x g 在)11,1(-p 上是减函数,从而0)1()11(=<-g p g 故当21<<p 时不符合题意.(3)当10≤<p 时,因为),1(+∞∈x 时,0)('<x h ,所以)(x h 是减函数 从而当),1(+∞∈x 时,0)1()(=<h x h所以)(x g 是减函数,从而0)1()2(=<g g故当10≤<p 时不符合题意综上p 的取值范围是),2[+∞.22. (1)曲线1C 的参数方程⎩⎨⎧+==θθsin 1cos y x (θ为参数) 可化为普通方程1)1(22=-+y x ,由⎩⎨⎧==θρθρcos sin x y ,可得曲线1C 的极坐标方程为θρsin 2=, 曲线2C 的极坐标方程为2)cos 1(22=+θρ.(2)射线3πθ=(0>ρ)与曲线1C 的交点A 的极径为33sin21==πρ, 射线3πθ=(0>ρ)与曲线2C 的交点B 的极径满足2)3cos 1(222=+πρ,解得51022=ρ, 所以51023||||21-=-=ρρAB . 23.(1)5)1()(<++x f x f 即5|12||12|<++-x x当21-<x 时,不等式化为51221<---x x ,∴2145-<<-x ; 当2121≤≤-x 时,不等式化为51221<++-x x ,不等式恒成立; 当21>x 时,不等式化为51212<++-x x ,∴4521<<x . 综上,集合}4545|{<<-=x x A . (2)由(1)知1=m ,则1=++c b a . 则a bc a c b a a 21≥+=-,同理c ab c c b ac b b 21,21≥-≥-,则 8222111=⋅⋅≥-⋅-⋅-a bc b ac c ab c c b b a a ,即8≥M .。
专题六 并列连词、复合句及特殊句式(习题)
专题六并列连词、复合句及特殊句式【考点集训】考点一并列连词Ⅰ.单句填空1.(2018河北衡水中学五次调考,70)She didn’t know anything about current TV shows fashion trends.答案or2.(2018福建泉州1月质检,67)In China,the question is not“What shall I have?”“What shall we have?”. Food is ordered to share with others,not just for oneself.答案but3.(2018河南中原名校五次联考,61)Around7:30a.m.,she was lying on her surfboard with her left arm in the water a14-foot-long tiger shark attacked her,severing her left arm just below the shoulder.答案when4.(2018湖北黄冈元月调研,67)What all of you really wanted was coffee,not the cup,you went for the best cups and then began looking at each other’s cups.答案but/yet5.(2018江西宜春中学一次诊断,67)As to acute stomachache,there is no need to have an operation;all you need to do is drinking a cup of Chinese herbs,the western way takes more time and money.答案while6.(2018贵州贵阳一中3月月考,50)“In an era when young people are so easily attracted by superstars,Coco reveals the emptiness of such adulation(吹捧),teaching kids to preserve respect the memory of their elders,” wrote reporter Peter Debruge.答案andⅡ.单句改错7.I can’t remember how the tune goes,so I’ll recognize it when I hear it.答案so→but8.Although his left hand was hurt,but he was happy to have saved the bird.答案删除but或将but改为yet9.Because I’ll see him tomorrow so I don’t need to return his call.答案删除so10.The artist was born poor,but poor he remained all his life.答案but→and考点二复合句题组一定语从句Ⅰ.单句填空1.(2018河北衡水中学五次调考,69)After living in Australia for many years,Louise finally returned to the country she was born.答案where2.(2018河北五个一联盟二次联考,43)There are many good websites you can check out the latest in the science world.答案where3.(2018湖北宜昌葛洲坝中学月考,50)Another saying which has come from the fable is“God helps thosehelp themselves”.答案who4.(2018福建厦门期末,66)Then Needham began his lifelong research,ended up creating the greatest work—Science and Civilization in China.答案which5.(2018山东烟台期末,62)His interest started a few years ago,he was in college and studying wildlife science.答案when6.(2018河北百校联盟1月联考,70)There are perhaps40million competitive table tennis players and many ordinary people play less seriously.答案who7.(2018四川雅安下学期三诊,63)He was a great scientist and an extraordinary man work and legacy will live on for many years.答案whose8.(2018云南昆明一中第七次月考,42)That is an Oxford college,famous graduates include the late Benazir Bhutto.答案whose9.(2018四川遂宁三诊,67)But it’s not like many other countries there seems to be tension among the different cultures.答案where10.(2018陕西宝鸡质检,65)Then,a fire,broke out in1969on Cleveland’s Cuyahoga River,shed light on the problem of chemical pollution in water.答案which11.(2018辽宁丹东一模,62)Pupils,usually come from the fifth or sixth grade,are divided into different teams and try to write down every word according to its pronunciation.答案who12.(2018宁夏六盘山高中一模,50)I am already looking forward to their next visit I can show them more of what Seville offers.答案when13.(2017山西晋商四校联考,70)Finally,after four hours,they arrived at the campsite their parents were waiting.答案where14.(2017四川凉山州高中毕业班二检,64)A survey was conducted in16cities with over one million population showed high proportion of urban Chinese have been suffering such health problems.答案that/whichⅡ.单句改错15.(2018吉林长春一模)It will be ten months before I attend the College Entrance Examination,that makes me worried.答案that→which16.(2018山东日照一模)It’s a black square suitcase,what is just as big as a schoolbag.答案what→which17.(2018河南天一大联考Ⅲ)When I was12,I met Mary.She came to China with her parents,whom taught English in a university.答案whom→who18.(2017黑龙江大庆二模)In the year2013which I was15,I joined an exchange student program.答案which→when19.I have an American friend,Marianne,she lives alone but has a pet dog,Sparky.答案she→who题组二名词性从句Ⅰ.单句填空1.(2019届山东烟台一中一次质检,44)There is a very good chance he may rob me.答案that2.(2018河南天一大联考Ⅲ,66)I first have to remove all the rotten parts,and sometimes,is left isn’t enough for my designs.答案what3.(2018湖北襄阳1月调研,64)The WHO has stated that of the56.5million deaths per year around the world,over 50percent are caused by diseases closely associated with unhealthy diet and lack of exercise and many of these deaths could be prevented.答案that4.(2018江西名校学术联盟质检Ⅱ,64)was most difficult was that in order to realize this dream,I needed to find an existent caféthat wasn’t doing well.答案What5.(2018湖南师大附中五次月考,62)The historical reason for beginning the new year in such a time is it is the time between autumn harvest and spring plowing and planting.In other words,it is the time for rest,relaxation and celebration after a year’s hard work.答案that6.(2018安徽六安一中五次月考,69)It’s possible that one way out could be blocked by fire or smoke,so you’ll want to know other ones are.答案where7.(2018辽宁沈阳一模,46)Darwin wondered a great deal about he saw.答案what8.(2018内蒙古呼和浩特质量调研普查,48)It’s time to start by reading aloud to might like it.答案whoever9.(2018陕西渭南质检,67)Actually,children learn violent behavior from adults or from they see on television or on the Internet.答案what10.(2018陕西四模,61)Do you know a story gets into the newspaper?Here is an example.答案how11.(2018甘肃西北师大附中三诊,49)Many people say they are impressed by how interesting the show is and they can’t stop laughing when they watch it.答案that12.(2018哈师大附中、东北师大附中、辽宁实验中学二模,64)Some people told stories about old times,and others wrote down they remembered.答案what13.(2017黑龙江哈尔滨三中一模,67)After seemed to be a hundred years,I found my audience applauding—I made it!答案what14.(2017黑龙江哈尔滨三中第一次验收,63)Statistics show over200billion yuan is spent every year on food that ends up in the garbage.答案that15.(2017辽宁沈阳东北育才学校一模,63)From the perspective of consumers,it can save some time for people who don’t have much spare time.Just click the mouse,and they can get they want while staying at home. 答案whatever/whatⅡ.单句改错16.(2018东北三省三校一模)It’s a good thing which the ride lasted for only15minutes.No more air rides for me,I swear!答案which→that17.(2018宁夏银川一中一模)While it was still necessary for my parents to support me economically and mentally at that time,I was old enough to think and decide by myself which I should do.答案which→what18.(2018甘肃西北师大附中三诊)It reminds us that it was the struggles and sacrifices of our forefathers that saved China,so we teenagers must cherish the fruits of the victory,treasure that we own now and preserve national pride.答案第三个that→what19.(2017江西九江十校二联)After living at school,I found it helped me save time and learn what to get on with others.答案what→how题组三状语从句Ⅰ.单句填空1.(2018陕西榆林二中三模,64)there are many positive developments associated with the Internet,there are also certain fears and concerns.答案While/Though/Although2.(2018山东滨州三次统考,64)it’s difficult to master the language,he considers it important for his future career.答案While/Though/Although3.(2018安徽六安一中五次月考,62)Talking about fires can be scary no one likes to think about people getting hurt or their things getting burned.答案because4.(2018福建永春一中等四校联考Ⅰ,62)The Great Wall winds its way from west to east,across deserts,over mountains,through valleys at last it reaches the sea.答案till/until5.(2018河北衡水中学一调,66)The song“A little bit longer” by Nick Jonas is an emotional and inspiring song that whenever I hear it,I always come close to dropping down tears.答案such6.(2018河南南阳一中三次考试,51)We know that tasks your group is given,a few rules need to be followed to ensure a productive and successful experience.答案whatever7.(2017陕西咸阳二模,64)Researchers have found,in their experiment,that a baby’s cries can cause unique emotional responses in the brain,making it impossible for us to ignore them we are parents or not.答案whetherⅡ.单句改错8.(2019届甘肃民乐一中一次诊断考试)In addition,we need to improve our oral English.When we are always learning English,we may not be able to make a fluent speech.We can’t easily communicate with others like native speakers.答案When→Although或Though或While9.(2019届黑龙江哈尔滨二十六中九月月考)However,after I go hiking,I make sure to have all of the proper necessities.First of all,I wear proper clothing and hiking shoes.答案after→before考点三特殊句式题组一倒装句Ⅰ.单句填空1.Jane won’t join us for dinner tonight and neither Tom.答案will2.Try she might,Sue couldn’t get the door open.答案as/though3.John opened the door.There(stand)a girl he had never seen before.答案stood/was standing4.—Is everyone here?—Not yet...Look,there(come)the rest of our guests!答案comeⅡ.句型转换5.I have never had such a special drink before!(改为倒装句)答案Never before have I had such a special drink!6.They reached a decision only after they had discussed the matter for several hours.(改为倒装句)答案Only after they had discussed the matter for several hours did they reach a decision.7.He didn’t begin to know how important the family was for him until he left his home.(改为倒装句)答案Not until he left his home did he begin to know how important the family was for him.8.Chongqing,one of the largest cities in China,lies at the meeting place of the Yangtze River and Jialing River. (改为倒装句)答案At the meeting place of the Yangtze River and Jialing River lies Chongqing,one of the largest cities in China.9.Distinguished guests and friends,welcome to our school.Our alumni(校友)from home and abroad are attending the ceremony of the50th anniversary this morning.(改为倒装句)答案Distinguished guests and friends,welcome to our school.Attending the ceremony of the50th anniversary this morning are our alumni(校友)from home and abroad.10.The power of TV that it can make a person suddenly famous is such.(改为倒装句)答案Such is the power of TV that it can make a person suddenly famous.11.Although he was unsatisfied with the payment,he took the job just to get some work experience.(改为倒装句)答案Unsatisfied though/as he was with the payment,he took the job just to get some work experience.12.Her business was so successful that Marie was able to set up new branches elsewhere.(改为倒装句)答案So successful was her business that Marie was able to set up new branches elsewhere.题组二其他特殊句式Ⅰ.单句填空1.a strange plant!I’ve never seen it before.答案What2.Was it on a lonely island he was saved one month after the boat went down?答案that3.I told them not everybody could run as fast as you did,I?答案didn’t4.He must be helping the old man to water the flowers,he?答案isn’t5.Please do me a favor—(invite)my friend Mr.Smith to Youth Theater at7:30tonight.答案invite6.If you have a job,devote yourself to it and finally you’ll succeed.答案doⅡ.单句改错7.His writing is so confusing that it’s difficult to make out how it is he is trying to express.答案how→what8.It is not who is right but what is right which is of importance.答案which→that9.The little boy came riding full speed down the motorway on his bicycle.How a dangerous scene itwas!答案How→What10.When you’ve finished that book,don’t forget to put it back on the shelf,do you?答案do→will11.There was a loud scream from the backstage immediately after the concert ended,wasn’t it?答案it→there12.Knocking at the door before entering please.答案Knocking→Knock13.There was a lot of homework to do,he didn’t attend the party.答案was→being或在he前加soⅢ.句型转换14.Not until the motorbike looked almost new did he stop repairing and cleaning it.(就画线部分进行强调,改为强调句)答案It was not until the motorbike looked almost new that he stopped repairing and cleaning it.14.If you help others whenever you can,you will make the world a nicer place to live in.(改为“祈使句+and+陈述句”句式)答案Help others whenever you can and you will make the world a nicer place to live in.过专题【五年高考】考点一并列连词1.(2016北京,35)I am not afraid of tomorrow,I have seen yesterday and I love today.答案for2.(2015北京,25)He is a shy man,he is not afraid of anything or anyone.答案but/yet3.(2014北京,21)Some animals carry seeds from one place to another,plants can spread to new places.答案so4.(2014天津,1)Give me a chance,I’ll give you a wonderful surprise.答案and考点二复合句题组一定语从句1.(2018北京,5)She and her family bicycle to work,helps them keep fit.答案which2.(2018天津,2)Kate,sister I shared a room with when we were at college,has gone to work in Australia. 答案whose3.(2018江苏,23)Self-driving is an area China and the rest of the world are on the same starting line.答案where4.(2017北京,31)The little problems we meet in our daily lives may be inspirations for great inventions. 答案that/which5.(2017天津,9)My eldest son,work takes him all over the world,is in New York at the moment.答案whose6.(2017江苏,28)In1963the UN set up the World Food Programme,one of purposes is to relieve worldwide starvation.答案whose7.(2016北京,22)I live next door to a couple children often make a lot of noise.答案whose8.(2016天津,9)We will put off the picnic in the park until next week,the weather may be better.答案when9.(2016浙江,11)Scientists have advanced many theories about why human beings cry tears,none of has been proved.答案which10.(2015天津,15)The boss of the company is trying to create an easy atmosphere his employees enjoy their work.答案where11.(2015安徽,28)Some experts think reading is the fundamental skill upon school education depends.答案which12.(2015福建,34)China Today attracts a worldwide readership,shows that more and more people all over the world want to learn about China.答案which13.(2015湖南,29)It is a truly delightful place,looks the same as it must have done100years ago with its winding streets and pretty cottages.答案which14.(2015陕西,15)As the smallest child of his family,Alex is always longing for the time he should be able to be independent.答案when15.(2015四川,3)The books on the desk,covers are shiny,are prizes for us.答案whose16.(2015浙江,19)Creating an atmosphere employees feel part of a team is a big challenge.答案where17.(2014天津,12)English is a language shared by several diverse cultures,each of uses it differently.答案which题组二名词性从句1.(2018北京,11)Without his support,we wouldn’t be we are now.答案where2.(2018北京,15)This is my father has taught me—to always face difficulties and hope for the best.答案what3.(2018天津,9)The gold medal will be awarded to wins the first place in the bicycle race.答案whoever4.(2018江苏,21)By boat is the only way to get here,which is we arrived.答案how5.(2017北京,23)Every year,makes the most beautiful kite will win a prize in the Kite Festival.答案whoever6.(2017天津,4)She asked me I had returned the books to the library,and I admitted that I hadn’t.答案whether/if7.(2017江苏,26)We choose this hotel because the price for a night here is down to$20,half of it used to charge.答案what8.(2017北京,26)Jane moved aimlessly down the tree-lined street,not knowing she was heading.答案where9.(2016北京,24)Your support is important to our work.you can do helps.答案Whatever10.(2016北京,29)The most pleasant thing of the rainy season is one can be entirely free from dust.答案that11.(2016天津,11)The manager put forward a suggestion we should have an assistant.There is too much work to do.答案that12.(2016江苏,21)It is often the case anything is possible for those who hang on to hope.答案that13.(2015北京,33)I truly believe beauty comes from within.答案that14.(2015北京,35)we understand things has a lot to do with what we feel.答案How15.(2015江苏,25)Li Bai,a great Chinese poet,was born is known to the public,but some won’t accept it. 答案Where16.(2015浙江,6)If you swim in a river or lake,be sure to investigate is below the water surface.Often there are rocks or branches hidden in the water.答案what17.(2015重庆,8)We must find out Karl is coming,so we can book a room for him.答案when18.(2015安徽,25)A ship in harbor is safe,but that’s not ships are built for.答案what19.(2014天津,14)I think impresses me about his painting is the colours he uses.答案what题组三状语从句1.(2018北京,2)we don’t stop climate change,many animals and plants in the world will be gone.答案If2.(2018天津,4)Let’s not pick these peaches until this weekend so they get sweet enough to be eaten.答案that3.(2018江苏,29)you can sleep well,you will lose the ability to focus,plan and stay motivated after one or two nights.答案Unless4.(2017北京,25)birds use their feathers for flight,some of their feathers are for other purposes.答案Although/While/Though5.(2017北京,28)If you don’t understand something,you may research,study,and talk to other peopleyou figure it out.答案until/till6.(2017江苏,23)Located the Belt meets the Road,Jiangsu will contribute more to the Belt and Road construction.答案where7.(2016北京,27)My grandfather still plays tennis now and then,he’s in his nineties.答案although/though8.(2016北京,33)I really enjoy listening to music it helps me relax and takes my mind away from other cares of the day.答案because/as9.(2016天津,7)the average age of the population increases,there are more and more old people to care for.答案As10.(2016浙江,5)online shopping has changed our life,not all of its effects have been positive.答案While/Although/Though11.(2015北京,32)the damage is done,it will take many years for the farmland to recover.答案Once/If12.(2015江苏,26)It is so cold that you can’t go outside fully covered in thick clothes.答案unless13.(2015天津,12)We need to get to the root of the problem we can solve it.答案before14.(2015浙江,9)Just a single word can change the meaning of a sentence,a single sentence can change the meaning of a paragraph.答案as15.(2015安徽,23)scientists have learned a lot about the universe,there is much we still don’t know.答案Although/Though/While16.(2015福建,31)the students came from different countries,they got along quite well in the summer camp.答案Although/Though/While17.(2015湖南,33)the job takes a significant amount of time,most students agree that the experience is worth it.答案Although/Though/While18.(2014安徽,25)The meaning of the word“nice”changed a few times it finally came to include the sense “pleasant”.答案before19.(2014湖南,26)You will never gain success you are fully devoted to your work.答案unless20.(2014陕西,24)The young couple,who returned my lost wallet,left I could ask for their names.答案before考点三特殊句式1.(2018北京,8)In any unsafe situation,simply(press)the button and a highly-trained agent will get you the help you need.答案press2.(2016江苏,34)Not until recently they encourage the development of tourist-related activities in the rural areas.答案did3.(2015天津,3)Only when Lily walked into the office she realize that she had left the contract at home. 答案did4.(2015湖南,31)Always(keep)in mind that your main task is to get this company running smoothly.答案keep5.(2014北京,24)(observe)carefully if any change occurs when doing experiments in the lab.答案Observe6.(2014陕西,17)No sooner Mo Yan stepped on the stage than the audience broke into thunderous applause.答案had7.(2014大纲全国,26)Not only the nurses want a pay increase,they want reduced hours as well.答案do8.(2014重庆,10)—I spent two weeks in London last summer.—Then you must have visited the British Museum during your stay,you?答案didn’t【三年模拟】时间:50分钟分值:98分A组2017—2019年模拟·基础题组考点一并列连词1.(2019届四川棠湖中学一次月考,62)There were many people waiting at the bus stop,some of them looked disappointed.答案but2.(2019届江西抚州七校10月联考,67)Maybe,when dancing,you think you’re not exercising entertaining yourself.答案but3.(2019届河南省实验中学二次月考,37)In their opinion,universities are public assets—they should serve not only the students and faculty the general public as well.答案but4.(2019届吉林汪清六中9月月考,65)Smoking not only does harm to their health to others.答案but(also)5.(2019届山东淄博实验中学、淄博五中一次诊断,66)They are not like us to finish it in one drink,prefer to drink by taking a small amount at a time.答案but6.(2018湖南师大附中一次月考,64)“I’ll tell you how you can improve your memory,” they say,they start their advice.答案and7.(2018河南郑州外国语学校二次调研,64)He or she can also attend classes from wherever they are recovering—whether at home from a hospital bed.答案or8.(2018贵州遵义四中一次月考,44)Many people seem too busy to take time to understand one another.my father sees taking time to listen as essential to any relationship,whether it involves family,friendship,or work.答案But9.(2017山西省重点中学协作体一模,68)He overcame many difficulties,he was not fortunate enough. 答案but/yet考点二复合句题组一定语从句1.(2019届吉林长春市实验中学开学考试,61)Dragon Head Raising Day,falls each year on the second day of the second lunar month,is one of the Chinese traditional festivals.答案which2.(2019届宁夏六盘山高级中学一次月考,66)There is a phrase describes the noodle-making process:“One noodle in the boiling water,one flying in the air,and one just being cut.”答案that3.(2019届河北武邑中学二次调研,65)Contrary to the popular belief,there is a great degree of personal freedom in this country,it’s relatively easy to set up a business and it’s extremely safe.答案where4.(2019届安徽皖南八校10月联考,70)In reality,FIFA rules the new cup as a mobile prize,means no matter which team wins the championship,it can not occupy the cup forever.答案which5.(2019届河南天一大联考一次联考,67)A diet that lacks vitamin B-12or iron can cause anemia,a condition in your blood doesn’t supply your body with enough oxygen.答案which6.(2019届辽宁葫芦岛协作校一次月考,68)This was the most valuable opinion of a Chinese person was given by a foreigner two centuries ago.答案that7.(2019届四川绵阳南山中学一诊,69)It is increasingly clear that China,is no longer copying western ideas,is leading in many new ways.答案which8.(2018浙江温州普通高中高考适应性测试,58)He had skin cancer,made him ready to give up.答案which9.(2018湖南永州一模,63)There are certain dates throughout the year the entire country takes a vacation at the same time.答案when10.(2018浙江湖州、衢州、丽水三地市教学质检,63)Analysts in China say there are three factorscontribute to the sudden increase of bikes.答案that11.(2018浙江宁波十校联考,59)is known to all,everyone has his own weaknesses and strengths.答案As12.(2018河北名校联盟质检Ⅰ,70)Therefore,university is a place you attain knowledge,to develop your values and to accept those who may be different.答案where13.(2018河北唐山五校月考,67)The pressure put on high school students by excessive schoolwork can cause serious depression,is unhealthy physically and mentally.答案which14.(2017河南豫南九校质量考评Ⅴ,70)No one had tried to understand what the real problem was except the headmaster,helped me out simply by listening and hugging.答案who15.(2017河南八市重点高中10月质检,65)The sharks followed the warm currents may have changed northward during this period.答案that/which题组二名词性从句1.(2019届吉林长春市实验中学上学期期初考试,70)It was believed on this day the well was full of dragon eggs which would bring the collector good harvest.答案that2.(2019届宁夏六盘山高级中学一次月考,70)One can find hand-made noodles all over China today,but Shanxi Province is special,for it’s the art of noodle-making has reached its top.答案where3.(2019届四川成都经济技术开发区实验中学9月月考,65)If we want to truly understand animals are eating plastic in the ocean,we have to think about how animals find food.答案why4.(2019届辽宁沈阳东北育才学校一次模拟,42)I couldn’t imagine it is like to lose your home and everything that you had.答案what5.(2019届福建三明一中返校考试,50)They were disappointed at they saw—the damage from the weather was just too bad.答案what6.(2019届黑龙江哈尔滨六中10月月考,61)Massive Open Online Courses,called MOOCs,are changing people learn in many places.答案how7.(2019届四川成都经济技术开发区实验中学9月月考,69)Everyone on the bus began talking about the girl had done,and the crowd of strangers suddenly became more friendly to each other.答案what8.(2018江西红色七校一联,65)There is no doubt the Asian Games will attract more visitors to enjoy visiting this wonderful city.答案that9.(2018辽宁重点高中协作校监测,41)Ann stepped outside her front door to see the weather was like. 答案what10.(2018四川雅安中学一次月考,66)When Rose realized the gift was,she was in total shock.答案what11.(2018河北衡水中学一调,63)I mainly listened to my parents were listening to.答案what/whatever12.(2017山东师大附中二模,63)My first task was to decide where to go and to get there.答案how13.(2017山东烟台一模,65)began as a small activity has taken the shape of an inspiring institution of international standards.答案What14.(2017福建龙岩五校期中,62)Therefore,it is advisable you should value and treat them with care.答案that15.(2017安徽黄山二模,62)While visiting Hangzhou’s West Lake and its surrounding beautiful hills,you’ll understand it’s been a great source of inspiration for artists,poets and philosophers throughout Chinese history.答案why题组三状语从句1.(2019届内蒙古赤峰二中二次月考,47)afternoon tea can be enjoyed at home,the best way to experience it is at a smart hotel or a café.答案Though/Although/While2.(2019届江西新余四中9月月考,68)They are pretending to keep a healthy and wise attitude towards failure simply they are incapable(无能力的)of succeeding.答案because3.(2019届广西桂林十八中二次月考,62)He speaks so slowly and strangely it takes patience to understand what he is saying.答案that4.(2019届四川邻水实验学校9月月考,70)No matter we go or what we do,we always embrace the adventure.答案where5.(2019届甘肃民勤一中一次月考,49)The condition was terrible that all the work was done by hand.答案so6.(2019届河南天一大联考一次联考,70)Healthy weight loss doesn’t mean severe calorie reduction.However, you’re anxious about your weight,speak with an expert to help ensure physical and mental health.答案if/when/whenever7.(2019届辽宁沈阳东北育才学校一模,46)Together,those volunteers and the Northern Essex Community College students worked to clear rubbish out of a three-story building.They put on protective suits and gloves they entered the building.答案before8.(2018江西红色七校一联,63)hosting the Asian Games will cost the government a lot,the benefits are easy for us to see.答案Though/Although9.(2018江苏启东中学一次月考,25)The doctor suggests that I should sleep with the window open it’s very cold.答案unless10.(2018广西钦州一次质检,70)They called911and waited with me,one holding my hand and speaking gently to me that they would stay help came.答案until/till11.(2018内蒙古集宁一中一次月考,49)In my opinion,the best choice is a good major at a good university.If we cannot obtain both,the first thing to consider is a good major,because no matter we study,we can still achieve a lot in a certain field if we try our best.答案where12.(2018江苏南通中学期初考试,33)the rising temperature and higher seas wouldn’t have had a direct effect on dinosaurs,they could have played an indirect role in their decline in numbers.答案While/Although/Though13.(2017江西九江十校二次联考,63)Hunting elephants was so profitable from1979to1989the number of elephants in Africa fell from1.3million to600,000.答案that14.(2017福建龙岩3月质检,67)But for now,they all have to postpone their plans the winter storms pass. 答案until/tillB组2017—2019年模拟·提升题组1.(2019届甘肃敦煌中学一诊)All too often,most children just take it for granted that their parents should serve them unconditionally.My dear mum or dad,thank you very much for bringing me up.答案or→and2.(2019届广东惠州市实验中学月考)We can choose between staying at home and taking a trip.If we stay at home,it is comfortable but there is no need to spend money.But in that case,we will learn little about the world.答案第一个but→and3.(2019届广东中山一中二次统测)Besides,it’s common that the young or middle-aged sit on the bus when the elderly have to stand.Measures must be taken to change this situation.答案when→while4.(2019届甘肃静宁一中一模)This is a place where I am always dreaming about.答案去掉where或where→that或which5.(2019届福建建瓯市芝华中学一次月考)Later,my teacher,she realized my problem,had a face-to-face talk with me.答案she→who6.(2019届江西吉安三中10月月考)About two years ago,I worked hard and entered a local key school,which my parents were proud of it.答案删掉it7.(2019届云南曲靖一中质量监测卷五)So that he could do was to read it in the shop.答案that→what8.(2018江西红色七校一次联考)It is hard to be mean to someone is being nice.答案someone后加who9.(2018吉林百校联盟联考)Neither of them was willing to say sorry but the quarrel continued.答案but→so/and10.(2018河北名校联盟质监Ⅰ)I’m grateful to all these people,with whom help I have been accustomed to American culture.答案whom→whose11.(2018河北名校联盟质监Ⅰ)That I want to say first is that the teachers here are very friendly.答案I前的That→What12.(2018湖南长郡中学二次月考)I have to spend periods of time figuring out how each is saying.答案how→what13.(2018辽宁重点高中协作校阶段考试Ⅰ)First,list all the tasks which must be done and decide which one requires immediate attention.答案第一个which→that14.(2017东北三省四市联考Ⅰ)An art gallery made me an offer of$5,000for this painting and I nearly sold it,so then I decided not to.答案so→but15.(2017河南豫南九校质量考评Ⅴ)A blog will be opened on the website of our school,that aims to help students to communicate better.答案that→whichC组2017—2019年模拟·综合题组Passage1(定语从句)There was a time1I was tired of learning English and disliked speaking English.And this was the reason 2my father forced me to join in a30-day training in an English club before I went to senior high school.When I first came to the club,3I met many strangers,I missed my parents very much.So I packed up my things and wanted to go home.Fortunately,my guide,4teacher was Yu Minhong,communicated with meface-to-face,from5I gained some useful instructions.He also introduced a good partner to me,and we got along。
专题12+函数的极(最)值问题学生版
专题12 函数的极(最)值问题【热点聚焦与扩展】从高考来看,对导数的应用的考查主要从以下几个角度进行:(1)考查导数的几何意义,往往与解析几何、微积分相联系.(2)利用导数求函数的单调区间,判断单调性;已知单调性,求参数.(3)利用导数求函数的最值(极值),解决生活中的优化问题.(4)考查数形结合思想的应用.导数是研究函数性质的重要工具,它的突出作用是用于研究函数的单调性、极值与最值、函数的零点等.从题型看,往往有一道选择题或填空题,有一道解答题.其中解答题难度较大,常与不等式、方程等结合考查.在高考导数的综合题中,所给函数往往是一个含参数的函数,且导函数含有参数,在分析函数单调性时面临分类讨论.(一)函数的极值问题 1、函数极值的概念:(1)极大值:一般地,设函数()f x 在点0x 及其附近有定义,如果对0x 附近的所有的点都有()()0f x f x <,就说()0f x 是函数()f x 的一个极大值,记作()0y f x =极大值,其中0x 是极大值点(2)极小值:一般地,设函数()f x 在点0x 及其附近有定义,如果对0x 附近的所有的点都有()()0f x f x >,就说()0f x 是函数()f x 的一个极小值,记作()0y f x =极小值,其中0x 是极小值点,极大值与极小值统称为极值 2、在定义中,取得极值的点称为极值点,极值点是自变量的值,极值指的是函数值.请注意以下几点: (1)极值是一个局部概念:由定义,极值只是某个点的函数值与它附近点的函数值比较是最大或最小并不意味着它在函数的整个的定义域内最大或最小(2)函数的极值不是唯一的即一个函数在某区间上或定义域内极大值或极小值可以不止一个(3)极大值与极小值之间无确定的大小关系(4)函数的极值点一定出现在区间的内部,区间的端点不能成为极值点3、极值点的作用:(1)极值点为单调区间的分界点 (2)极值点是函数最值点的候选点4、()f x 在0x x =处可导,那么0x x =为()f x 的一个极值点⇒()0'0f x = 说明:①前提条件:()f x 在0x x =处可导②单向箭头:在可导的前提下,极值点⇒导数0=,但是导数0=不能推出0x x =为()f x 的一个极值点,例如:3y x =在()0,0处导数值为0,但0x =不是极值点③上述结论告诉我们,判断极值点可以通过导数来进行,但是极值点的定义与导数无关(例如:y x =在()0,0处不可导,但是0x =为函数的极小值点) 5、求极值点的步骤: (1)筛选: 令()'0fx =求出()'f x 的零点(此时求出的点有可能是极值点)(2)精选:判断函数通过()'f x 的零点时,其单调性是否发生变化,若发生变化,则该点为极值点,否则不是极值点(3)定性: 通过函数单调性判断出是极大值点还是极小值点:先增后减→极大值点,先减后增→极小值点 6、在综合题分析一个函数时,可致力于求出函数的单调区间,当求出单调区间时,极值点作为单调区间的分界点也自然体现出来,并且可根据单调性判断是极大值点还是极小指点,换言之,求极值的过程实质就是求函数单调区间的过程.7、对于在定义域中处处可导的函数,极值点是导函数的一些零点,所以涉及到极值点个数或所在区间的问题可转化成导函数的零点问题.但要注意检验零点能否成为极值点. 8、极值点与函数奇偶性的联系:(1)若()f x 为奇函数,则当0x x =是()f x 的极大(极小)值点时,0x x =-为()f x 的极小(极大)值点 (2)若()f x 为偶函数,则当0x x =是()f x 的极大(极小)值点时,0x x =-为()f x 的极大(极小)值点 (二)函数的最值问题 1、函数的最大值与最小值:(1)设函数()f x 的定义域为D ,若0x D ∃∈,使得对x D ∀∈,均满足()()0f x f x ≤,那么称0x x =为函数()f x 的一个最大值点,()0f x 称为函数()f x 的最大值(2)设函数()f x 的定义域为D ,若0x D ∃∈,使得对x D ∀∈,均满足()()0f x f x ≥,那么称0x x =为函数()f x 的一个最小值点,()0f x 称为函数()f x 的最小值(3)最大值与最小值在图像中体现为函数的最高点和最低点(4)最值为函数值域的元素,即必须是某个自变量的函数值.例如:()[)ln ,1,4f x x x =∈,由单调性可得()f x 有最小值()10f =,但由于x 取不到4,所以尽管函数值无限接近于ln4,但就是达不到.()f x 没有最大值.) (5)一个函数其最大值(或最小值)至多有一个,而最大值点(或最小值点)的个数可以不唯一,例如()sin f x x =,其最大值点为()22x k k Z ππ=+∈,有无穷多个.2.“最值”与“极值”的区别和联系如图为一个定义在闭区间[]b a ,上的函数)(x f 的图象.图中)(1x f 与3()f x 是极小值,2()f x 是极大值.函数)(x f 在[]b a ,上的最大值是)(b f ,最小值是3()f x(1)“最值”是整体概念,是比较整个定义域内的函数值得出的,具有绝对性;而“极值”是个局部概念,是比较极值点附近函数值得出的,具有相对性.(2)从个数上看,一个函数在其定义域上的最值是唯一的;而极值不唯一;(3)函数在其定义区间上的最大值、最小值最多各有一个,而函数的极值可能不止一个,也可能没有一个.(4)极值只能在定义域内部取得,而最值可以在区间的端点处取得,有极值的未必有最值,有最值的未必有极值;极值有可能成为最值,最值只要不在端点必定是极值.3、结论:一般地,在闭区间[]b a ,上函数()y f x =的图像是一条连续不断的曲线,那么函数()y f x =在[]b a ,上必有最大值与最小值.4、最值点只可能在极值点或者边界点处产生,其余的点位于单调区间中,意味着在这些点的周围既有比它大的,也有比它小的,故不会成为最值点.5、利用导数求函数的最值步骤:一般地,求函数)(x f 在[]b a ,上的最大值与最小值的步骤如下: (1)求)(x f 在(,)a b 内的极值;(2)将)(x f 的各极值与端点处的函数值)(a f 、)(b f 比较,其中最大的一个是最大值,最小的一个是最小值,得出函数)(x f 在[]b a ,上的最值6、求函数最值的过程中往往要利用函数的单调性,所以说,函数的单调区间是求最值与极值的基础7、在比较的过程中也可简化步骤:(1)利用函数单调性可判断边界点是否能成为最大值点或最小值点 (2)极小值点不会是最大值点,极大值点也不会是最小值点 8、最值点的作用 (1)关系到函数的值域(2)由最值可构造恒成立的不等式:例如:()ln 1f x x x =-+,可通过导数求出()()min 10f x f ==,由此可得到对于任意的0x >,均有()()min 0f x f x ≥=,即不等式ln 1x x ≤-.【经典例题】例1【2017课标II ,理11】若2x =-是函数21()(1)x f x x ax e-=+-的极值点,则()f x 的极小值为( )A.1-B.32e --C.35e -D.1例2【2018届湖北省黄冈、黄石等八市高三3月联考】已知函数(1)当时,求的极值;(2)若有两个不同的极值点,求的取值范围;例3【2018届江苏省淮安市等四市高三上一模】已知函数.⑴当时,求函数的极值;⑵若存在与函数,的图象都相切的直线,求实数的取值范围.例4【2018届福建省厦门市高三下第一次检查(3月)】已知函数,其中为自然对数的底数. (1)当时,证明:;(2)讨论函数极值点的个数.例5【2017北京,理19】已知函数()e cos xf x x x =-. (Ⅰ)求曲线()y f x =在点(0,(0))f 处的切线方程; (Ⅱ)求函数()f x 在区间π[0,]2上的最大值和最小值.例6【2018届北京市人大附高三十月月考】已知a 是实数,函数()()2f x xx a =-(Ⅰ)若()13,f '=求a 的值及曲线()y f x =在点()()1,1f 处的切线方程; (Ⅱ)求()f x 在区间[]0,2上的最小值.例7【2018届北京市城六区高三一模】.已知函数(I)当时,求函数的单调递增区间;(Ⅱ)当时,若函数的最大值为,求的值.例8【2018届北京市清华附中高三十月月考】已知()()320f x ax bx cx a =++≠在1x =±时取得极值,且()11f =-.(Ⅰ)试求常数a , b , c 的值;(Ⅱ)求函数()f x 在[]0,2x ∈上的最大值.例9【2018届北京市首师大附高三十月月考】已知函数()()()322111.32f x x x x a x x a R ⎛⎫=-++--∈ ⎪⎝⎭(Ⅰ)若1x =是()f x 的极小值点,求实数a 的取值范围及函数()f x 的极值; (Ⅱ)当1a ≥时,求函数()f x 在区间[]0,2上的最大值.例10【2018届陕西省榆林市二模】已知函数,.(1)若时,求函数的最小值;(2)若函数既有极大值又有极小值,求实数的取值范围.【精选精练】1.【2018届安徽省安庆市2018届高三二模】已知函数()()2ln xf x ef e x e'=-(e 是自然对数的底数), 则f (x )的极大值为( ) A. 2e-1 B. 1e -C. 1D. 2ln22.【2018届福建省三明市第一中学高三下开学】函数在的最小值是( )A. B. 1 C. 0 D.3.【2018届广东省茂名市五大联盟学校高三3月联考】已知函数 (其中,为自然对数的底数)在处取得极大值,则实数的取值范围是( ) A. B.C.D.4.【2018届海南省高三第二次联考】若1x =是函数()()ln x f x e a x =+的极值点,则实数a =__________. 5.【2018届北京市北京19中高三十月月考】已知函数()y f x =的导函数有且仅有两个零点,其图像如图所示,则函数()y f x =在x =______________处取得极值.6.【2018届东北三省三校(哈师大附中、东北师大附中、辽宁省实验中学)高三一模】已知函数,是函数的极值点,给出以下几个命题:①;②;③;④;其中正确的命题是______________.(填出所有正确命题的序号)7【2018届北京市清华附中高三十月月考】设函数()ln f x x a x =-(其中a R ∈). (Ⅰ)当1a =时,求函数()f x 在1x =时的切线方程; (Ⅱ)求函数()f x 的极值.8.【2018届北京市丰台区高三一模】已知函数()()()=e ln 1xf x a x a R -+∈.(Ⅰ)求曲线()y f x =在点()()1,1f 处的切线方程; (Ⅱ)若函数()y f x =在1,12⎛⎫⎪⎝⎭上有极值,求a 的取值范围.9.【2018届江西省上饶市高三下二模】设函数()22ln x e kf x k x x x=++(k 为常数, 2.71828e =为自然对数的底数).(1)当0k ≥时,求函数()f x 的单调区间;(2)若函数()f x 在()0,3内存在三个极值点,求实数k 的取值范围.10.【2018届北京市城六区高三一模】已知函数()1e ln xf x a x x ⎛⎫=⋅++ ⎪⎝⎭,其中a R ∈. (Ⅰ)若曲线()y f x =在1x =处的切线与直线exy =-垂直,求a 的值; (Ⅱ)当()0,ln2a ∈时,证明: ()f x 存在极小值.11【2018届北京师范大学附中高三下二模】已知函数,其中,为自然对数底数.(1)求函数的单调区间; (2)已知,若函数对任意都成立,求的最大值.12.【2018届新疆维吾尔自治区高三二模】已知函数()1xf x e ax =++(a R ∈).若0x =是()f x 的极值点.(I )求a ,并求()f x 在[]2,1-上的最小值;(II )若不等式()'1xkf x xe <+对任意0x >都成立,其中k 为整数, ()'f x 为()f x 的导函数,求k 的最大值.。
东北三省三校(哈师大附中、东北师大附中、辽宁省实验中学)2018届高三第二次模拟考试语文试题
【题文】阅读下面的材料,根据要求写作。
①前车已覆,后未知更,何觉时?——《荀子·成相》②传统是一种巨大的阻力,是历史的惰性力——恩格斯《社会主义从空想到科学的发展》③提旧事者失一目,忘旧事者失双目——索尔仁尼琴上面几则材料,引发你怎样的感悟和思考?请就此写一篇不少于800字的文章。
要求自选角度,明确文体,自拟标题;不要套作,不得抄袭;不少于800字。
【答案】前事不忘,后事之师西伯利亚有一种白雕,全省纯白,漂亮的羽毛,它们引以为自慠,认真梳理,生怕遭到玷污。
然而正是这个习性,害了它们,猎人们在它们周围撒上煤灰,就可以轻松地捉住它们。
但更可悲的是,它们的后代并未吸取教训,一如既往地守护着羽毛,导致种群数量减少。
白雕的故事告诉我们,只图外表的虚荣与珍视害了它们,但更为重要的是,它们的后代不会吸取教训,仍然延续这种生活习性,可怕可悲。
以人为鉴,可以之得失。
这是唐太宗总结的历史教训,作为中国历史上数一数二的明君,想必他自己也能牢记这个教训。
历史上有许多教训需要牢记,有许多准则需要去遵守,而特别强调“以人为鉴”这一点,说明吸收前人的教训是极为必要的。
唐太宗就是帮助父亲推翻了荒淫无道的隋炀帝后才建立了唐朝,他深知荒淫无道的下场,才会立志做一代明君,保证李唐江山永不变色,而万古流芳。
反观隋炀帝,隋朝建立仅仅十余年,当初他帮助父亲灭掉了南朝的陈国,对陈后主的荒淫无道,纸醉金迷的生活也不是不了解,可他却没有吸收教训,依旧作了一个暴君,最终落得一个社稷破碎,自己也身死人手的悲惨下场。
何者?“仁义不施,攻守之势异也”。
以史为鉴,可以知兴替。
“秦人无暇自哀而后人哀之,后人哀之而不鉴之,亦使后人而复哀后人也”。
杜牧《阿房宫赋》的总结可以说非常精辟。
人们都只顾眼前,并未追溯过去,反思古人,甚至连自己以前犯的错误都无法转化为经验教训,不可谓不悲哉!人不犯错误就不会进步,但犯了错误不知道总结吸取教训,也只能徒增伤疤而已,这样只能取得事倍功半的效果。
【全国百强校首发】东北三省三校(哈师大附中、东北师大附中、辽宁省实验中学)2018届高三第二次模
2018年三省三校二模考试语文参考答案1.B2.C3.C4.B5.①予人美感但不让人沉沦绝望的忧伤②富于气质的忧伤:或悲天悯人,或敬畏生命,或不断寻美③有疗救作用的忧伤:富于营养,给人(自己,他人)希望6.含义(1)生命的基础是深厚的,可以给生命以滋养(1分)(2)阿多尼斯和树的灵魂相通,彼此激励(1分)(3)他的忧伤是有节制的,有质量的(1分)作用(1)承上启下(1分),与上文川端康成和下文众多自杀的诗人的忧伤形成对比(1分)(2)说明阿多尼斯的忧伤有质量,突出主题(1分)7.D8.B9.⑴重视学习者的学习体验⑵回归教育原点,提高教育内容质量;⑶利用并强化前沿技术⑷注重价格优势、便捷优势和教育教学的效率效果(每点2分,第一点必须有,2.3.4点里任意答出2点即可)10.C11.D (存问,就是指慰问,没有“并进行请教”和“虚心纳谏”的意思)12.B(“这些都得到了皇帝的高度认可”错误,文中说“帝疑有侵冒,令罢归听勘”)13.(1)宗皋劝说皇帝推崇(崇尚)宽容敦厚,认真考察采纳忠诚的言论,不要只是把严明作为治理的标准。
(“惇崇”“察”“纳”“以……为”各1分,句意1分)(2)皇帝怀疑他有侵夺冒领之嫌,命令罢职回来听候调查。
不久事情真相得以查清楚。
(“侵冒” “勘”“ 白” 各1分,句意2分)参考译文:郭宗皋,字君弼,是福山人。
嘉靖八年的进士。
提拔为御史。
嘉靖十二年十月,星像下雨一般陨落。
没过多久,哀冲太子(明世宗朱厚熜皇太子朱载基,追封为哀冲太子)去世,大同军队发生动乱。
宗皋劝说皇帝推崇(崇尚)宽容敦厚,认真考察采纳忠诚的言论,不要只是把严明作为治理的标准。
皇帝大怒,下诏入狱,打四十大板释放了他。
历任苏州、松州、顺天府的巡按使。
恰逢朝廷推荐保定巡抚刘夔回来管理院中事务,宗皋评议刘夔曾经推荐大学士李时之子,奉承讨好没有品行,不讲作风纪律,(惹怒皇帝)被判罚剥夺两月俸禄。
二十三年十月,敌寇攻入万全右卫,抵达广昌,布列大营四十里。
【中小学资料】东北三省三校(哈师大附中、东北师大附中、辽宁省实验中学)2018届高三文综第一次模拟考试试
东北三省三校(哈师大附中、东北师大附中、辽宁省实验中学)2018届高三文综第一次模拟考试试题第Ⅰ卷本卷共35小题。
每小题4分,共140分。
在每个小题给出的四个选项中,只有一项是符合题目要求的。
读16.5︒S安第斯山区作物垂直变化示意图(图1),据此完成1-2题。
1. 该山区的农业类型为典型的立体农业,在①②③地区种植的农作物对应正确的是A. 咖啡、玉米香蕉、稻米马铃薯、小麦B. 香蕉、稻米咖啡、玉米马铃薯、小麦C. 马铃薯、小麦咖啡、玉米香蕉、稻米D. 香蕉、稻米马铃薯、小麦咖啡、玉米2. 卡巴斯村落选址考虑的主要区位因素是A. 降水丰富,水源充足B. 地形平坦,交通便利C. 海拔较高,气候适宜D. 近农业区,便于生产等水压线是指水压相等的各点的连线。
在等水压线上各点的水在水压的作用下都可以升到同样高度,类似于地图上的等高线。
图2为华北平原局部地区地下水等水压线图。
据此完成3-4题。
3. 图中面积最大且中心水位最低的漏斗区位于A. 衡水B. 沧州C. 唐山D. 廊坊4. 针对该地区地下水利用过程中出现的问题,最有效的治理措施为A. 禁止任何开采地下水的行为B. 为涵养水源而大面积植树造林C. 丰水期加强对地下水的回灌D. 关闭消耗大量淡水资源的企业图3为地中海污染程度图。
环地中海沿岸城市、工厂排放污水量大,由于过度污染,某些海区被列为游泳禁区。
据此完成5-6题。
5. 地中海沿岸污染严重的原因除污水排放过量外,还有A. 全年降水量均较少,尤其夏季海水蒸发旺盛B. 采矿、炼油厂、皮革制品等排放污水总量大C. 海域近乎封闭,与大西洋交换周期长D. 南部因沙漠区淡水注入少,自净速度缓慢6. 游泳禁区可能在A. 地中海南部海区B. 亚得里亚海西南海区C. 爱琴海东南海区D. 第勒尼安海北部海区2015年,中国进入急速老龄化阶段,预计到2025年,老龄人口数量将达到3亿人,图4为2010-2025年我国老年人口数量变化预测图,据此完成7-8题。
东北三省三校2018届高三第三次联合模拟考试语文试卷(含答案)(20200420022056)
东北三省三校(哈师大附中、东北师大附中、辽宁省实验中学)2018届高三第三次模拟考试语文试题一、现代文阅读(35分)(一)论述类文本阅读(本题共3小题,9分)阅读下面的文字,完成1——3题。
汉字书法作为一种特殊的审美信号系统,传导着中国人的文化心理和审美人格。
它以特有的形态,将中国人或规范或潇洒的人格价值,中国人或守格或破格的文化精神暗传出来。
在线条的飞扬和变化的布局中,你会时不时感觉到中国人平衡与欹侧、协调与矛盾、统一与变化、齐整与错落等等独特的哲理气息和思辨方式。
汉字由象形的图画经由简化、抽象、变形,逐步演变为符号,每个汉字最初都是描摹事物的一个单幅画(如鱼、龙),或由两幅、多幅图画拼接起来的一幅组画(如有偏旁的好、安)。
音指与象指在汉字中合一,笔划与结构中均有图像、意象和情象内容。
后来随着字的日渐功能化、实用化、符号化,书与画在实用功能层面开始分离。
自从书法进入了愈来愈重视以真草隶篆、特别是行草来表达书写者感情的阶段,艺术的功能重又上升,书与画在艺术审美层面重又结合。
弹性幅度极大的毛笔,可浓可淡可枯可润的水墨,以及能够以吸水度和印迹感天然造成原生效果的宣纸,使中国书法因毛笔、水墨、宣纸的书写,能以在快慢、提按、推拉、扭折、顿挫、转甩、浓淡、湿枯、晕涩、虚实中相映相辉、相生相克,能以比其他纸笔无比丰富的艺术语汇,给书法作品的构思和表现提供无限张力,给精神创造和艺术创造提供了其他文字书写无可比拟的阔大空间。
汉字的点、划、撇、捺、钩、方框(圆)和三角的多形态笔法,以及毛笔笔划的多方向性写法,这些在别的文字中罕有的特色,为各类线条和几何图形大量进入书法铺就了通道,使得现代逐步发展起来的徒手线艺术、点画造型艺术、符号化艺术、空间造型艺术的许多观念,很早就进入了汉字书写,同步提升了中国书法具象和抽象的双向表达能力。
汉字书写由具象的图画在漫长的岁月中逐级简化、变异、提升为书法艺术抽象的符号,却又草蛇灰线,留下了各种象形图画的印痕。
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东北三省三校(哈师大附中、东北师大附中、辽宁省实验中
学)2018届
一、选择题:本题目有35个题目,每个题目有4分,总分为I40分。
在每个项目中给出的四个选项中,只有一个符合主题的要求。
10月,XXXX重厌氧交通大学根据土壤的性质,发明了一种将沙子和水混合成土壤的粘合剂,并在内蒙古乌兰布和沙漠进行了试验,成功地将4000多亩沙漠变成了绿洲,成为世界治沙史上的一个奇迹。
相应地完成问题1-2。
1.大规模使用这种防砂技术的限制因素是:人工砂技术、土壤、运输、水源。
这项技术可以给当地带来的直接影响包括
A.改变大气环流,增加夏季降水;保护水源,防止渗漏,增强土壤抗风蚀能力;促进产业结构调整,加快第二产业和第三产业发展;协调区域联系,促进矿产资源开发;当低温气流在埃加勒新浅滩向北流动时,南非的伪撒丁岛将随之向北迁移产卵。
图1是南非沙丁鱼迁徙路线示意图,据此完成3 ~ 4个问题。
3当南非沙丁鱼向北迁移到它们的产卵场时,可能的现象是:1 .德班附近植被茂盛;开普敦附近平静的海水;鹦哥海盐场适宜的盐干燥;华北到处都是红叶
4.海洋中浮游生物的生存依赖于营养盐。
该海域营养盐的来源是:a .由低温流携带到海面的营养盐;b .由盛行风吹来的营养盐;c .由暖流携带到海面的营养盐;d .当低温流遇到南方暖流时,营养盐泛滥
在一段时间内,中国东部的某个地区受到天气系统的影响,该系统有
好几天的好天气。
在该系统中,心脏位于图3中的位置b。
图2是摄影爱好者在该地区公园拍摄的风景照片。
据此,完成5~6个问题。
5.如果系统继续影响该地区,可能是a。
空气质量越来越差b。
风力明显增加c。
白天和晚上的温差在减小d。
雨是连续的。
6.如果空调和空调也在废天气系统的控制之下,则空调中的天气与空调中的天气相反
A.湿冷b .干冷c .暖干d .暖湿
区位熵是一个用来衡量某一地区元素空间分布的指标。
值越高,位置和功能越高。
图4是XXXX圣彼得堡城市土地利用区位熵值的空间分布图。
相应地完成7~8个问题。
7.圣彼得堡使用的最明显的土地类型是工业用地、商业用地、住宅用地、交通用地。
关于圣彼得堡的城市发展,以下陈述是正确的:a .环形交通线缓解了市中心和郊区的交通压力;b .商业区的发展带动了城市住宅的快速发展;c .带状城市形态的形成与工业用地密切相关;d .城市的城市化水平已完全进入反城市化阶段
在两条相邻河流的开发过程中,如果低洼河流具有很强的侵蚀力,河谷的上游源头将会继续加长,使其与地势较高的河流相遇,从而捕获其河水称为河流捕获。
图5是攻击前后河流的示意图。
根据
这就完成了9 -11个问题。
9.关于甲和乙河流,正确的说法是
A.河流b的流动。
河流a的高地形。
河流b的侵蚀。
河流b的侵蚀。
河流d的直线河道。
河流a的强沉积物堆积在10。
河流b的m是由
于
A.上游水量减少,泥沙淤积严重b .河流两岸岩体崩塌,泥沙淤积严重c .河流变窄,泥沙淤积严重d .地转偏转力使其淤积严重。
11.有一种观点认为,渭河是黄河的一条支流,最初是黄河的主流。
当上游被占领时,渭河流域相对于渭河非常宽。
图5中的哪个河段可能与渭河a.①b.②c.③d.④的水流成因一致。
根据材料,回答下列问题。
(24分)
茭白因其味道鲜美、营养丰富而广受欢迎。
它的根系发达,需要更多的水分,并且不耐寒、不耐高温、不耐旱。
浙江省磐安县玉山台是全国最大的高山茭白生产基地。
单季高山茭白每年8月至9月生长,生长周期为11个月。
因此,单季茭白体积大,质量好,价格相对较高。
然而,美国和中国缺乏的是单季茭白的亩产量低且不稳定。
图8是磐安县农业生产模式图。
(1)分析玉山平台发展茭白产业的区位优势。
(8分)
(2)分析了磐安县单季茭白亩产量低且不稳定的自然原因。
(8分)。