2018年高一3月限时
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2019级创新实验班阶段检测(一)英语试卷第I卷(三部分共65分)一、单项选择(共15小题;每小题1分,满分15分)1. We regret to inform you that there are no tickets ______ for Friday’s performance.A. accessibleB. acceptableC. availableD. suitable2. —My Goodness! Somebody ______ my umbrella.—Don’t worry. You can share mine.A. tookB. has takenC. had takenD. is taking3. The number of smokers, ______ is reported, has dropped by 17 percent in just one year.A. itB. whichC. whatD. as4. Not until recently ______ the development of tourist-related activities in the rural areas.A. they had encouragedB. had they encouragedC. did they encourageD. they encourage5. Many young people, most ______ were well-educated, headed for remote areas to follow their dreams.A. of whichB. of themC. of whomD. of those6. It is one of the ugliest faces I have ever seen. I’ve never seen ______.A. an ugly oneB. an ugliest oneC. the ugliest oneD. an uglier one7. —The Spring Festival is coming. I am considering traveling in a small town, especially one with an ocean view. —I agree with you; I would appreciate ______ if you could take me there.A. itB. oneC. thatD. this8. They agreed to lend us the car ______ we returned it before the weekend.A. as long asB. as soon asC. as far asD. as well as9. --Brad was Jane's brother!-- ______ he reminded me so much of Jane.A. No doubtB. Above allC. No wonderD. No problem10. All the citizens here strongly insist those who are caught ______ “harmful” advertisements in the streets ______ punished strictly.A. putting up; will beB. putting out; should beC. putting out; shallD. putting up; be11. Jasper has put up “No Parking” _____ outside his gate, but these haven’t had any effect.A. labelsB. signalsC. signsD. notes12. If you really understood the difficulties facing the Russian government, you wouldn't be so ___________of its spending reductions.A conservative B. critical C. controversial D. cruel13. It is generally accepted that the experiences of the child in his first years largely ______ his character and later personality.A. determinedB. deservedC. demandedD. defended14. I was impressed by the way ______ he dealt with the problem.A. thatB. whichC. in thatD. with which15. Most Chinese people tend to ____some money for old age.A. put awayB. keep upC. give awayD. make up二、完形填空。
吉林省白城市第一中学2018-2019学年高一数学3月月考试题第Ⅰ卷(选择题,共60分)一、选择题(本大题共12小题,每小题5分,共60分,在每小题给出的四个选项中,只有一项符合题目要求。
)1.在△ABC 中,若a =3,cos A =12,则△ABC 外接圆的半径为( ) A.6 B.2 3 C.3 D. 32.已知向量a =(2,1),a +b =(1,k ),若a ⊥b ,则实数k 等于( )A.12 B .-2 C .-7 D .33.在△ABC 中,若c =2,b =2a ,且cos C =14,则a 等于( )A .2 B.12 C .1 D.134.已知向量a =(32,sin α),b =(sin α,16),若a ∥b ,则锐角α为()A.30°B.60°C.45°D.75°5.在△ABC 中,(BC →+BA →)·AC →=|AC →|2,则△ABC 的形状一定是( )A.等边三角形B.等腰三角形C.直角三角形D.等腰直角三角形6.已知a =(1,-2),b =(3,4),则a 在b 方向上的投影是( )A .1B .-1C . 5D .- 57.下列关于向量a ,b 的叙述中,错误的是( )A .若a 2+b 2=0,则a =b =0B .若k ∈R ,k a =0,所以k =0或a =0C .若a ·b =0,则a =0或b =0D .若a ,b 都是单位向量,则a ·b ≤1恒成立 8.设A ,B 为锐角△ABC 的两个内角,向量a =(2cos A ,2sin A ),b =(3cos B,3sin B ).若a ,b 的夹角的弧度数为π3,则A -B =( ) A. B . C .D .9.已知向量a =(c os 75°,sin 75°),b =(cos 15°,sin 15°),则|a -b |的值为( ) A.12B.1C.2D.3 10.在△ABC 中,角A ,B ,C 的对边分别是a ,b ,c ,若20aBC →+15bCA →+12cAB →=0,则△ABC最小角的正弦值等于( )A.45B.34C.35D.7411.已知|p |=22,|q |=3,p ,q 的夹角为π4,如图,若AB →=5p +2q ,AC →=p -3q ,D 为BC 的中点,则|AD →|为( )A.152B.152C.7D.1812.设△ABC 的三个内角为A ,B ,C ,向量m =(3sin A ,sin B ),n =(cos B ,3cos A ),若m ·n =1+cos(A +B ),则C 的值为( )A.π6B.π3C.2π3D.5π6第Ⅱ卷(非选择题,共90分)二、填空题(本大题共4个小题,每小题5分,共20分)13.在△ABC 中,已知a =32,cos C =13,S △ABC =43,则b = . 14.已知 c =50,b =72,C =135°,则三角形解的个数为________.(用数字作答)15.已知△ABC 内一点O 满足关系2OA →+3OB →+5OC →=0,则S △BOC ∶S △COA ∶S △AOB =16. 如图所示,半圆的直径AB =2,O 为圆心,C 是半圆上不同于A ,B 的任意一点,若P 为半径OC 上的动点,则(PA →+PB →)·PC →的最小值是________.三、解答题(本大题共6小题,共70分,解答题应根据要求写出必要的文字说明,证明过程或演算步骤)17.(10分)已知向量a 与b 的夹角θ为120°,且|a |=4,|b |=2,求:(1)a ·b ; (2)(a +b )·(a -2b ); (3)|a +b |.18. (12分)在△ABC 中,A ,B ,C 的对边分别为a ,b ,c ,且sin A a =3cos C c. (1)求C 的大小;(2)如果a +b =6,CA →·CB →=4,求c 的值.19.(12分) 已知△ABC 的角A ,B ,C 所对的边分别是a ,b ,c ,设向量m =(a ,b ),n =(sin B ,sin A ),p =(b -2,a -2).(1)若m ∥n ,求证:△ABC 为等腰三角形;(2)若m ⊥p ,边长c =2,角C =π3,求△ABC 的面积.20.(12分)如图所示,在△ABC 中,AQ →=QC →,AR →=13AB →,BQ 与CR 相交于点I , AI 的延长线与边BC 交于点P .(1)用AB →和AC →分别表示BQ →和CR →;(2)如果AI →=AB →+λBQ →=AC →+μCR →,求实数λ和μ的值;(3)确定点P 在边BC 上的位置.21.(12分)已知向量a =(sin ωx +cos ωx ,sin ωx ),向量b =(sin ωx -cos ωx,23cosωx ), 设函数f (x )=a ·b +1(x ∈R )的图象关于直线x =π3对称,其中常数ω∈(0,2). (1)若x ∈[0,π2],求f (x )的值域; (2)若点A 为函数f (x )图像上的动点,设且,求B 点轨迹方程g (x ); (3)在(2)前提下求函数g (x )对称轴方程及单调区间。
高一普通班第三学月考试数学试题一、选择题(12题,每题5分,共60分)1. 已知函数f(x)=且f(a)=-3,则f(6-a)等于( )A. -B. - C .-D.-【答案】A【解析】当a≤1时,f(a)=2a-1-2=-3无解,当a>1时,解f(a)=-log2(a+1)=-3得:a=7,∴f(6-a)=f(-1)=2-2-2=−故选A2. 函数y=的递减区间为( )A. (-∞,-3]B. [-3,+∞)C. (-∞,3]D. [3,+∞)【答案】B【解析】令因为在R上递减,所以求函数y=的递减区间即求的递增区间,根据二次函数的单调性可知的递增区间为[-3,+∞)故选B3. 对于幂函数f(x)=(α是有理数)给出以下三个命题:①存在图象关于原点中心对称的幂函数;②存在图象关于y轴对称的幂函数;③存在图象与直线y=x不重合,但关于直线y=x对称的幂函数.其中真命题的个数是( )A. 0B. 1C. 2D. 3【答案】D【解析】对于①当α=3时,f(x)=图像关于原点对称,所以①对;对于②当α=-2时,f(x)=图像关于y轴对称,所以②对;对于③当α=-1时,f(x)=的图象与直线y=x不重合,但关于直线y=x对称,所以③对;故选D4. 函数y=lg|x|( )A. 是偶函数,在区间(-∞,0)上单调递增B. 是偶函数,在区间(-∞,0)上单调递减C. 是奇函数,在区间(-∞,0)上单调递增D. 是奇函数,在区间(-∞,0)上单调递减【答案】B【解析】令f(x)=lg|x|,定义域为关于原点对称,则故函数y=lg|x|是偶函数,因为在递减,在上单调递增,根据复合函数的单调性,可得y=lg|x|在在区间(-∞,0)上单调递减故选B5. 已知f(x)是函数y=log2x的反函数,则y=f(1-x)的图象是( )A. B. C. D.【答案】C【解析】f(x)是函数y=log2x的反函数,则,f(1-x)=,过点可以排除A,B,D 故选C6. 已知集合A={-2,2},B={m|m=x+y,x∈A,y∈A},则集合B等于()A. {-4,4}B. {-4,0,4}C. {-4,0}D. {0}【答案】B【解析】当时,;当时,;当时,;当时,所以B=故选B7. 已知集合M={y|y=x2},用自然语言描述M应为()A. 满足y=x2的所有函数值y组成的集合B. 满足y=x2的所有自变量x的取值组成的集合C. 函数y=x2图象上的所有点组成的集合D. 满足y=x的所有函数值y组成的集合【答案】A【解析】由于集合 M={y|y=x2}的代表元素是y,而y为函数y=x2的函数值,则M为y=x2的值域,即满足y=x2的所有函数值y组成的集合故选A.8. 已知集合A={0,1},则下列式子错误的是( )A. 0∈AB. {1}∈AC. ∅⊆AD. {0,1}⊆A【答案】B【解析】根据元素与集合关系的表示法,0∈A,故A正确;根据集合与集合关系的表示法,{1}⊂A,判断B假;∅是任意集合的子集,故C正确;根据集合子集的定义,{0,1}⊆A,故D正确;故选B.点睛:本题考查的是集合的包含关系的判断及其应用,元素与集合关系的判断,是基础题.9. 下列命题①空集没有子集;②任何集合至少有两个子集;③空集是任何集合的真子集;④若∅⊊A,则A≠∅.其中正确的个数是( )A. 0B. 1C. 2D. 3【答案】B【解析】①错,空集是任何集合的子集,有∅⊆∅;②错,如∅只有一个子集;③错,空集不是空集的真子集;④正确,因为空集是任何非空集合的真子集.考点:集合间的基本关系.10. 集合P={x|y=x2},Q={y|y=x2},则下列关系中正确的是( )A. P⊊QB. P=QC. P⊆QD. P⊋Q【答案】D【解析】均为数集,,∴,故选D.11. 若集合A={0,1,2,3},B={1,2,4},则集合A∪B等于( )A. {0,1,2,3,4}B. {1,2,3,4}C. {1,2}D. {0}【答案】A【解析】试题分析:两集合的并集是由两集合的所有的元素构成的集合,因此A∪B={0,1,2,3,4}考点:集合并集运算12. 集合A={x|-1≤x≤2},B={x|x<1},则A∩B等于( )A. {x|x<1}B. {x|-1≤x≤2}C. {x|-1≤x≤1}D. {x|-1≤x<1}【答案】D【解析】∵集合A={x|-1≤x≤2},B={x|x<1},∴A∩B={x|-1≤x≤2}∩{x|x<1}={x|-1≤x<1}.故选D.点睛:本题考查了集合的交集的基本运算,是基础题目,掌握集合交集的定义是关键.二、填空题(本大题共4小题,每题5分,共20分)13. 设全集U=R,A={x|x>0},B={x|x>1},则A∩(∁U B)=________.【答案】{x|0<x≤1}【解析】试题分析:根据补集定义首先求得,然后根据交集定义得到.由题.考点:集合的交,并,补的混合运算14. 已知集合A={x|x<a},B={x|1<x<2},A∪(∁R B)=R,则实数a的取值范围是________.【答案】{a|a≥2}【解析】∵B={x|1<x<2},∴∁R B={x|x≤1或x≥2}.又∵A∪(∁R B)=R,A={x|x<a}.观察∁R B与A在数轴上表示的区间,如图所示:可得当a≥2时,A∪(∁R B)=R.故答案为{a|a≥2}15. 已知集合A={x|-2<x<2,x∈Z},B={y|y=x2+1,x∈A},则集合B用列举法表示是_____.【答案】{1,2}【解析】由题意知A={-1,0,1},而B={y|y=x2+1,x∈A},所以B={1,2}.故答案为{1,2}16. 已知集合A={1,2,3},B={1,2},C={(x,y)|x∈A,y∈B},用列举法表示集合C=________.【答案】{(1,1),(1,2),(2,1),(2,2),(3,1),(3,2)}【解析】∵C={(x,y)|x∈A,y∈B},∴满足条件的点为(1,1),(1,2),(2,1),(2,2),(3,1),(3,2).故答案为{(1,1),(1,2),(2,1),(2,2),(3,1),(3,2)}点睛:本题考查了集合的表示法,考查了学生灵活转化题目条件的能力,是个基础题.三.解答题(17题10分,其余12题分)17. 已知S={x|2x2-px+q=0},T={x|6x2+(p+2)x+q+5=0},且S∩T=,求S∪T.【答案】S∪T=【解析】试题分析:试题解析:∵S∩T=,∴∈S,且∈T.因此有⇒从而S={x|2x2+7x-4=0}=.T={x|6x2-5x+1=0}=.∴S∪T=∪=.18. 已知集合A={x|x=3n+1,n∈Z},B={x|x=3n+2,n∈Z},C={x|x=6n+3,n∈Z}.(1)若c∈C,问是否存在a∈A,b∈B,使c=a+b;(2)对于任意的a∈A,b∈B,是否一定有a+b∈C?并证明你的结论.【答案】(1) 一定存在a∈A,b∈B,使c=a+b成立. (2)不一定有a+b∈C.【解析】试题分析:(1)根据已知条件知:若a∈A,b∈B,则一定存在n1,n2∈z,使得a=3n1+1,b=3n2+1,所以a+b=3(n1+n2)+3.而集合M的元素需满足:x=6n+3=3•2n+3,显然n1+n2=2n 时成立,(2)根据(1)判断:若n1+n2为奇数,则结论不正确所以不一定有a+b=m且m∈M.试题解析:(1)令,则.再令,则.故若,一定存在,使成立.(2)不一定有.证明如下:设,则.因为所以.若为偶数,令,则,此时.若为奇数,令,则,此时综上可知,对于任意的不一定有.19. 已知集合M中含有三个元素2,a,b,集合N中含有三个元素2a,2,b2,且两集合相等,求a,b的值.【答案】a=0,b=1或a=,b=【解析】试题分析:根据集合相等的条件:元素完全相同,建立方程即可得到a,b的值,要注意检验是否符合集合元素的互异性.试题解析:由题意,得或解得或或经检验,a=0,b=0不合题意;a=0,b=1或a=,b=合题意.所以,a=0,b=1或a=,b=.20. 设U={1,2,3},M,N是U的子集,若M∩N={1,3},则称(M,N)为一个“理想配集”,求符合此条件的“理想配集”的个数(规定(M,N)与(N,M)不同).【答案】3试题解析:符合条件的理想配集有①M={1,3},N={1,3}.②M={1,3},N={1,2,3}.③M={1,2,3},N={1,3}.共3个.21. 已知log2(log3(log4x))=0,且log4(log2y)=1.求的值.【答案】64试题解析:∵log2(log3(log4x))=0,∴log3(log4x)=1,∴log4x=3,∴x=43=64.由log4(log2y)=1,知log2y=4,∴y=24=16.因此==8×8=64.点睛:本题考查了对数函数的运算性质,注意计算的准确性,是基础题.22. 已知函数y=f(x)的图象与g(x)=log ax(a>0,且a≠1)的图象关于x轴对称,且g(x)的图象过点(4,2),求函数f(x)的解析式.【答案】f(x)=.【解析】试题分析:把点(4,2)代入g(x)的解析式求出a,再根据条件求出f(x)的解析式;试题解析:∵g(4)=log a4=2,解得a=2,∴g(x)=log2x.∵函数y=f(x)的图象与g(x)=log2x的图象关于x轴对称,∴f(x)=.点睛:本题考查对数函数的性质应用,考查了函数的对称性,属于基础题.。
江苏省沭阳县修远中学2018-2019学年高一英语3月月考试题(实验班)第I卷选择题(三部分, 共110分)第一部分:听力第一节(共20小题;每小题1.5分,满分30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. When was the woman’s speech?A. Today.B. Yesterday.C. The day before yesterday.2. What does the man want to listen to?A. Some rock’n’roll CDs.B. His parents’ classical records.C. Some hip-hop songs.3. How much money does the woman want at first?A. $20.B. $50.C. $60.4. What can we learn about the accident?A. The truck driver was killed.B. The two passengers survived.C. The car was not seriously damaged.5. When does the man want the woman to wake him up?A. At 9:00.B. At 7:00.C. At 6:50.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。
听每段对话或独白前,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。
每段对话或独白读两遍。
沭阳修远中学2018-2019学年度第二学期第一次阶段测试高一语文试题一、语言文字运用(18分)1. 在下面一段话空缺处依次填入词语,最恰当的一组是()黄公望的风格竟是因为他不形成风格,仿佛在绘画之外,对山水、对人世,他有那么多的爱与追求,有那么多的宽容大度,因而笔墨的自在、布局的,在他的杰作《富春山居图》中都到了令人的地步。
A. 刻意灵活叹为观止B. 故意空灵叹为观止C. 刻意空灵高山仰止D. 故意灵活高山仰止2.李明同学说话喜欢引经据典。
在下面几种情境讲话时,他引用的古诗文恰当得体的一项是()。
A.同学张华要到外地去上大学,李明给他送行时说:“与君离别意,同是宦游人,”张华,你一人远走他乡要多多珍重啊!”B.同学刘欣作文时想找一句表现读书乐趣的名句,李明不假思索地说道:“这还不容易,‘谈笑有鸿儒,往来无白丁’嘛!”C.李明和同学一起去春游,面对着满园盛开的梨花,他情不自禁地说道:“真可谓‘忽如一夜春风来,千树万树梨花开’,太美了!”D.李明的同桌张海学习上得过且过,不求甚解,李明意味深长地对他说:“‘学而不思则罔’,你可不能总是浅尝辄止啊!”3.下列各项有关文学文化常识的表述,有误的一项是()A.《指南录后序》是南宋末年著名爱国诗人文天祥为他的诗集《指南录》写的序,“臣心一片磁针石,不指南方不肯休”就出自他的名篇《渡扬子江》。
B.古代传说,狐狸在洞外死去时,一定会把头朝着它洞穴所在的土丘,表示对自己巢穴的依恋。
后多用“正丘首”表示死于故乡或故国。
C.《左传》是记录春秋历史的编年体史书,相传是春秋末年鲁国史官左丘明为孔子修订的《诗经》所作的传,记载了鲁隐公元年至鲁哀公二十七年的史事。
D.“贤士大夫者,冏卿因之吴公,太史文起文公、孟长姚公也。
”冏卿、太史是官职名,因之、文起、孟长分别是吴公、文公、姚公的字,这是古人的习惯。
4.填入下面文字中横线上的语句,与上下文衔接最恰当的一项是()咬文嚼字有时是一个坏习惯,所以这个成语的含义通常不很好。
江苏省启东中学2018-2019学年高一化学3月月考试题(创新班)可能用到的相对原子质量:H 1 C 12 N 14 O 16 Na 23 Mg 24 Al 27 S 32 Cl 35.5 Ca 40 Mn 55 Fe 56 Co 59 Cu 64 Br 80 Ba 137第一卷(选择题,共50分)注意:本试题分第一卷和第二卷两部分,第一卷为选择题,第二卷为非选择题。
考试时间为100分钟,满分为100分。
单项选择题(本题包括号15小题,每小题2分,共30分。
每小题只有一个选项符合题意)1. 盐类水解在工农业生产和日常生活中有着广泛的应用,有关应用或说法与盐类水解无关的是A.用热的纯碱溶液洗涤餐具上的油污B.生活中常用明矾净水C.用稀硫酸或浓氨水除去铜器表面的铜绿D.长期使用硫铵化肥的土壤,易变酸性,可施用适量的熟石灰2.下列各组元素,按照原子半径依次减小、第一电离能依次增大的顺序排列的是A、K、Na、LiB、Al、Mg、NaC、N、O、CD、P、S、Cl3.下列变化需要吸收能量的是A.1s22s22p63s1→1s22s22p6B.3s23p5→3s23p6C.2p x22p y12p z1→2p x12p y12p z2D.2H→H—H4.生活中的下列现象与原子核外电子发生跃迁有关的是A、钢铁长期使用后生锈B、节日里燃放的焰火C、金属导线可以导电D、卫生丸久置后消失5. 下列有关物质性质或应用的说法正确的是A.医疗上,常用碳酸钠治疗胃酸过多B.在海轮外壳上安装锌块以减缓船体腐蚀C.液氨汽化放出大量的热,可用作制冷剂D.明矾具有强氧化性,常用于自来水的杀菌消毒6.下列说法正确的是A.Na2SiO3溶液加热、蒸干、灼烧后所得固体的成分是SiO2B.配制FeCl3溶液时,将FeCl3固体溶解在硫酸中,然后再用水稀释到所需的浓度C.泡沫灭火器中常使用的原料是碳酸氢钠和硫酸铝D.为绘制中和滴定曲线,在滴定过程中,每隔相同时间用pH计测定一次锥形瓶中溶液的pHB(g)+C(g),若反应物的浓度由2 mol·L-1降7. 在恒温、恒容的密闭容器中进行反应A(g)到0.8 m01·L一1需要20s,那么反应物浓度再由0.8 mol·L-1降到0.2 mol·L-1所需要的时间为 ( )A.l0sB.大于10sC.小于10sD.无法判断8.H2O2分解速率受多种因素影响。
山东省临沂商城外国语学校2018-2019学年高一英语3月月考试题一.听力:共两节,满分30分做题时,先将答案标在试卷上。
录音内容结束后,你将有两分钟的时间将试卷上的答案转涂到答题卡上。
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,从试题所给的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.Why doesn't the woman want to wear her coat?A. The style is old.B. The color is ugly.C. The quality is not good.2. When is the man flying to Paris?A. On February 5th.B. On February 10th.C. On February 15th.3. What will the man do tomorrow?A. Go hiking.B. Stay at home.C. See a doctor.4. How much did the jeans cost before the sale?A. 30 dollars.B. 50 dollars.C. 60 dollars.5. Where does the man's uncle live?A. In New York.B. In London.C. In Paris.听第6段材料,回答6到7题。
6.What did the man study in university in New York?A. Business.B. Teaching.C. Computer.7. Where was the man born?A. In London.B. In Sydney.C. In New York.听第7段材料,回答8到9题。
江西省南昌十中2018-2019学年高一语文3月月考试题一、现代文阅读(27分)(一)实用类文本阅读(本题共3小题,12分)材料一:网络媒体公信力是指网络新闻媒体本身所具有的一种被社会公众所信赖的内在力量。
它是媒体自身内在品质和外在形象在社会公众心目中所占据的位置,是衡量媒体权威性、信誉度和社会影响力的标尺,是网络媒体立身之本,也是网络传媒业的核心价值追求。
其公信力的高低,决定着其舆论影响力的大小。
媒体公信力是衡量、评判其舆论影响力最重要、最根本的标准。
几年来,网络媒体渠道拓宽,收视率、发行量、点击率等对网络媒体的影响日益加大,部分网络媒体为了追求轰动效应和市场卖点,传播许多与事实不符的信息,严重损害了媒体的公众形象。
这种现状的成因似乎特别的简单,一门心思地奔着有爆炸效应的、新奇的甚至是标题党、哗众取宠、有偿新闻的路子上去,谁还来得及去核实新闻的真实性?只要在报道最底下写上“转载”这两字,似乎就可以规避所有责任。
(摘编自《网络公信力的流失》)材料二:(摘编自《2017年中国网络媒体公信力调查报告》)材料三:移动互联网在推动信息传播和社会发展的同时也让互联网信息污染问题渐渐凸显。
“虚假新闻”“标题党”“植入广告”“新闻炒作”和“三俗信息”是最受网民反感的五大类新闻形态。
用户对网络媒体的严肃性、可信度与权威性的满意度不乐观。
报告显示,体制内媒体的满意度整体高于商业类媒体;商业类媒体平台中只有少数媒体如腾讯新闻客户端等跻身第一阵营,成为网民访问量最大、用户选择度最高的商业类网络媒体平台。
然而,越是有影响力的媒体,就越需要在用户信任度和社会责任感上加强,在新闻报道的过程中更要认真审核信息,深度挖掘新闻,杜绝有偿报道等。
其实,对于网络媒体来说,要提高用户的满意度,关键是为用户提供价值,这个价值在于一要坚守媒体责任,杜绝虚假信息的生产与宣传、杜绝为利益裹挟。
二要生产优质的内容,进行更有深度的思考和更优质的新闻产出。
湖北省黄冈市黄州中学2018-2019学年高一数学3月月考试题 理时间:120分钟 满分:150分一、选择题:(本大题共12小题,每小题5分,共60分.在每小题给出的选项中,只有一项是符合题目要求. ) 1.已知数列1,2,,,,…,则2在这个数列中的项数是 ( ) A.16B.24C.26D.282.在等差数列{a n }中,a 1+a 5=16,则S 5= ( )A.80B.40C.31D.-313.计算-sin133°cos197°-cos47°cos73°的结果为 ( )A. B. C. D.4.在等比数列{a n }中,如果a 1+a 4=18,a 2+a 3=12,那么这个数列的公比为 ( ) A.2 B. C.2或D.-2或5.已知cos2θ=,则sin 4θ-cos 4θ的值为 ( ) A.B.C.-D.-6. 若()sin cos 1,tan 3cos 21αααβα=-=+,则tan β=( )A.-1B.17 C. 17- D.1 7.《九章算术》之后,人们学会了用等差数列知识来解决问题,《张丘建算经》卷上第22题为:“今有女善织,日益功疾(注:从第2天开始,每天比前一天多织相同量的布),第一天织5尺布,现在一月(按30天计)共织390尺布”,则从第2天起每天比前一天多织______尺布. ( ) A.B.C.D.8.ABC △的内角A 、B 、C 的对边分别为a 、b 、c.已知3a =,c =cos A =,则b=( )ABC .2D .3 9. 在ABC ∆中,角,,A B C 所对的边分别为,,a b c ,若cos cA b<,则ABC ∆为( ) A .钝角三角形 B .直角三角形 C.锐角三角形 D .以上三种都有可能 10. 已知数列{}n a 是等差数列,若12111a a <-,且它的前n 项和n s 有最大值,则使得0>n s 的n 的最大值为( )A. 11B. 12C.21D. 22 11.某校运动会开幕式上举行升旗仪式,旗杆 正好处在坡度o 15的看台的某一列的正前方, 从这一列的第一排和最后一排测得旗杆顶部的 仰角分别为o60和o30,第一排和最后一排的距离为,旗杆底部与第一排在同一个水平面上.若国歌长度约为50秒,要使国歌结束时国旗刚好升到旗杆顶部,升旗手升旗的速度应为( )(米 /秒)B .310 C .12 D .71012. 在各项均为正数的数列{a n }中,S n 为前n 项和,na 2n +1=(n +1)a 2n +a n a n +1且a 3=π, 则tan S 4=_______.A 3B - 3C 1D 2 二、填空题: 本题共4小题,每小题5分,共20分13.数列0,3,8,15,24,…… 的一个通项公式n a =14. 一艘海警船从港口A 出发,以每小时40海里的速度沿南偏东40︒方向直线航行,30分钟后到达B 处,这时候接到从C 处发出的一求救信号,已知C 在B 的北偏东65︒,港口A 的东偏南20︒处,那么B ,C 两点的距离是 海里.15.已知S n 为等差数列{a n }的前n 项和,若a 2∶a 4=7∶6,则S 7∶S 3=__________.16.已知数列{a n }的前n 项和为S n =kn 2,若对所有的n ∈N *,都有a n+1>a n ,则实数k的取值范围是三、解答题: 本题共6小题,共70分17.(本题满分10分)化简并求值 (1)(1-tan 215°)cos 215° (2)18.(本题满分12分)设0,3πα⎛⎫∈ ⎪⎝⎭cos αα+= (1)求cos 6πα⎛⎫+ ⎪⎝⎭的值; (2)求7cos 212πα⎛⎫+⎪⎝⎭的值.19. (本题满分12分)在ABC ∆中,内角,,A B C 所对的边分别是,,a b c ,已知4B π=,sin cos a B A =;(1)求A 的大小。
四川省射洪中学校高一下期第一次月考数学试卷(考试时间120分钟 满分150分)本试卷分第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)两部分,另附答题卡和答题卷,第Ⅰ卷1至2页,第Ⅱ卷3至4页,考试结束后,将答题卡和答题卷一并交回。
第Ⅰ卷 选择题(满分50分)注意事项:1.答第Ⅰ卷前,考生务必将自己的姓名、准考证号、考试科目用2B 铅笔涂写在答题卡上。
2.每小题选出答案后,用2B 铅笔把正确选项涂在机读卡上,如需改动,用橡皮擦干净后,再选涂其他答案,不能答在试题卷上。
一.选择题:(本大题共10小题,每小题5分,满分50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.若sin 0,tan 0,αα<>则α是( ).A 第一象限角 .B 第二象限角 .C 第三象限角 .D 第四象限角2.化简AB BC CA ++=( ).A AC.B BA.C CA.D 03.sin 210︒=( )1.2A -1.2B .C D4.若sin36°cos α-sin54°cos84°=12,则α值可能为( ).96A ︒.6B ︒.54C ︒.84D ︒5.已知3sin()5πα+=且α是第三象限的角,则cos(2)πα-的值是( ) 4.5A - 4.5B 4.5C ± 3.5D6.在ABC ∆2sin b A =,则B 为 ( ).A 3π .B 6π .C 6π或56π .D 3π或23π7.在ABC ∆中,a 、b 、c 分别为A ∠、B ∠、C ∠的对边.若3,4,60,a b C ︒==∠= 则c 的值等于 ( ).A 5 .B 13 .C .D8.函数2()2sin cos f x x x x =-C :①图象C 关于直线1112x π=对称;②函数()f x 在区间5(,)1212ππ-内是增函数; ③由2sin2y x =的图象向右平移3π个单位长度可以得到图象C ;以上三个论断中,正确论断的个数是( ) .A 0.B 1.C 2.D 39.若3cos()(,2),42ππααπ-=∈则cos α的值为( )4.5A .B -4.5C - D 10.关于x 的方程22cos cos cos02Cx x A B --=有一个根为1,则此三角形为( ) .A 等腰三角形 .B 直角三角形 .C 锐角三角形 .D 钝角三角形第Ⅱ卷(非选择题,共 100 分)二.填空题:(本大题共5小题,每小题5分,共25分,把答案填在答题卡上) 11.已知1tan ,4α=则sin 2cos sin cos αααα+-的值为________. 12.在ABC ∆中,角,,A B C 的对边分别是,,,a b c 若222,b c a bc +=+且4,AC AB ⋅=则ABC ∆的面积等于________.13.若,43x ππ-≤≤则函数cos()cos()44y x x ππ=+-的值域为________. 14.一船以每小时15km 的速度向东航行.船在A 处看到一个灯塔B 在北偏东60,︒行驶4小时后,船到达C 处,看到这个灯塔在北偏东15,︒这时船与灯塔的距离为 km .15.某学生对函数()2cos f x x x =⋅的性质进行研究,得出如下的结论:①函数()f x 在[],0π-上单调递增,在[]0,π上单调递减; ②点,02π⎛⎫⎪⎝⎭是函数()y f x =图像的一个对称中心;③函数()y f x = 图像关于直线x π=对称;④存在常数0M >,使()f x M x ≤对一切实数x 均成立. 其中正确的结论是 .三.解答题:本大题共6小题,共75分,解答应写出文字说明,演算步骤或证明过程。
高一英语限时训练一.阅读理解(共10小题;每小题2.5分,满分25分)阅读下列短文,从每题所给的A、B、C和D四个选项中,选出最佳选项,并在答题纸上将该项涂黑。
AWhen I was growing up, my mother had a ring she never took off. It was the only ring I ever saw her wear during my childhood. She didn’t really have any other jewelry, and, in fact, I remember my father saying that he didn’t even buy her a ring when they were married.The years passed. My father, who had come from Mexico in the 1920s to try to earn a living, worked long, long hours at the service station he ran. And my mother worked at home, keeping house for her husband and eight children. With his hard work and her thriftiness(节俭), they sent their first son off to college, then another child and then another. The older children helped with the school fees of the younger ones.Just as the last two children were graduating from college, my father died suddenly of a heart attack, but my mother lived on for another twenty-three years. Their children had become lawyers, businessmen and teachers. In the last years of her life, my mother was finally able to buy some jewelry that she really loved.A few years before she died, she told me that she wanted her jewelry to go to her granddaughters. And when she died, it was done. A diamond ring to this one, a pearl ring to that one, and so it went.Then I discovered it: her first ring. It had been worn so long that it became so thin and would probably break at any minute. I took the ring, polished it with a cloth and carried it to the bank to place in a safety box. To me, it was a treasure that showed the devotion my mother had made for us and the values that she lived.The rest of m y family doesn’t quite understand this, but when I look at that ring, I see the priceless jewel of my mother’s strength and the deep love that she showed us every day of her life.21. Why did the mother only have a ring in her early years?A. She had no desire for anything else.B. She saved every penny for her children.C. Her husband refused to buy her other jewels.D. Her husband was too poor to afford other jewels.22. What do we know about the children?A. They worked hard to earn their own school fees.B. They struggled to earn a living when they grew up.C. The first son helped support his younger brothers and sisters.D. The last two children failed to finish college due to the father’s death.23. Why did the author place the ring in the bank?A. The ring was worth large amounts of money.B. The rest of her family didn’t want to see the ring.C. She was afraid the ring might be damaged by her kids.D. She hoped to remember her mother’s selflessness forever.24. According to the passage, what does the ring stand for?A. The mother’s suffering in life.B. The mother’s devotion to kids.C. The kids’ deep love for the mother.D. The kids’ memories of the hard life.Women are more miserable(悲惨的)than men for almost their entire lives and are happier only after the age of 85, according to a large NHS survey. Growing numbers of British people are reporting unhappiness, the survey found, with women more likely to report serious problems at almost every age.Twenty-eight percent of women aged 16-24 have mental(精神上的)health problems, compared with 16 percent of men, the survey of 8,000 people found. While this gap becomes smaller between 25 and 34, when 18 percent of both sexes have probable mental disorders, women become unhappier as they enter middle age.Kate Lovett, dean of the Royal College of Psychiatrists, said that women may be more miserable because they “are still more likely to bear the caring responsibilities at home”. This duty may lessen in old age, when they are no longer responsible for children and elderly parents at the same time. Sixteen percent have serious problems over the age of 65, falling to 14 percent over 85.Nineteen percent of men of this age appear to have a mental problem. Kate explained, “Men who are single are more likely to develop mental problems and men at this age may be more likely to be on their own.”“Thankfully, women are more likely to speak out about their mental health problems and ask for support from services.” Stephen Buckley, of the Charity Mind, said. This may explain why far fewer women than men kill themselves for mental health problems.The survey also found that youth mental illness is up almost half since 2012 and one in four young women suffers from a mental health condition. The reasons for rising rates of mental illness are yet to be found. If the rates of a physical disease were rising so quickly, it is difficult.to believe that we would be so slow finding out why.25. What’s the main idea of the text?A. Women are generally unhappier than men until 85.B. Women devote much more to the family than men.C. Mental health problems increase gradually with age.D. Mental health problems can be solved easily by women.26. According to Kate, why do women feel unhappier in middle age?A. They probably live alone and feel lonely.B. They begin to have serious health problems.C. They have no one to talk to about their problems.D. They have too much duties as a parent and daughter.27. How does the author sound in the last paragraph?A. Hopeful.B. Curious.C. Concerned.D. Determined.The Fennec fox is also known as the desert fox since it survives in the Sahara Desert(沙哈拉沙漠). It is the smallest of the species of foxes, and quite a few people wish to raise it as a pet because of its appearance. However, this is very rare, as it needs special care and attention. Let’s take a look at the basic information on the Fennec fo x, including its physical appearance ,natural habitat, and diet.Physical AppearanceThe Fennec fox is the smallest type of fox, with a body length of about 9.5-16 inches, and 6-inch-long ears. It weighs only around one kilogram. It has a cream-colored, furry body, with a black-tipped tail.Their ears are the largest among all foxes relative to the body size, which not only provide them with great hearing, but also radiate the extreme desert heat and thus help to keep the body cool. Moreover, in order to walk on the hot sand, a Fennec fox’s feet are covered with thick fur. Not only that, the feet also help in digging, as this animal livesunder the ground.Habitat and LifestyleThe habitat of this animal is mainly in the Sahara Desert, and also in other parts of North Africa. The Fennec fox is usually active during the night. This character helps it deal successfully with the extreme heat in the desert.As an extremely social animal, it often lives in groups of ten and each group has its own land. This animal is, however, aggressive too, ready to attack, especially in the mating(交配)season, when they all compete with each other for a mate.DietThe Fennec fox is an omnivore(杂食动物). While it can survive on plants, it also needs other items such as insects, rabbits, birds and eggs. Getting used to living in the desert allows it to survive for long periods without any water. They are known to take in water when eating food, but will drink water if available.28. What helps the Fennec fox survive in the desert?A. The small body size.B. The great hearing.C. Getting active at night.D. Living in groups.29. The word “radiate” (Paragraph 3) is closest in meaning to ______.A. send outB. take inC. suffer fromD. turn down30. Which of the following statements about the Fennec fox is TRUE?A. It seldom attacks others.B. It’s difficult to raise it as a pet.C. It can survive without any water.D. It’s the smallest animal in the desert.二.7选5(共5小题;每小题2分,满分10分)根据短文内容,从短文后的选项中选出能填入空白处的最佳选项,并在答题纸上将该选项标号涂黑。