【全国市级联考word】东北三省四市教研联合体2018届高三第二次模拟考试理数试题
2018年东北三省四市教研联合体高考数学二模试卷(理科)
2018年东北三省四市教研联合体高考数学二模试卷(理科)一、选择题:本大题共12小题,每小题5分,共60分。
在本小题给出的四个选项中,只有一项是符合题目要求的。
1. 设复数z=(1−i)(2−i),则它的共轭复数z的虚部为()A.3iB.−3iC.3D.−3【答案】C【考点】复数的运算【解析】直接利用复数代数形式的乘除运算化简得答案.【解答】∵z=(1−i)(2−i)=1−3i,∴z=1+3i.∴z的虚部为(3)2. 已知集合A={x|y=log2(1−x)},B={y|y=2x, x∈R},则A∩B=()A.⌀B.(0, 1)C.(0, +∞)D.(1, +∞)【答案】B【考点】交集及其运算【解析】可解出集合A,B,然后进行交集的运算即可.【解答】A={x|x<1},B={y|y>0};∴A∩B=(0, 1).3. 已知数列{a n}为等差数列,S n是它的前n项和,若S4=20,a4=8,则S8=()A.52B.72C.56D.64【答案】B【考点】等差数列的前n项和【解析】利用等差数列的通项公式与求和公式即可得出.【解答】设等差数列{a n}的公差为d,∵S4=20,a4=8,∴4a1+4×3d=20,a1+3d=(8)2联立解得a1=d=(2)×2=7(2)则S8=8×2+8×724. 如图是一个几何体的三视图,则这个几何体的表面积为( )A.72B.66C.60D.30【答案】 A【考点】由三视图求体积 【解析】本题主要考查三视围及空间几何体的表面积. 【解答】解:由三视图可知{x +y −2=3,x −y +3=2y,解得{x =3,y =2,结合题意可知该几何体是一个直三棱柱,且直三棱柱的底面是以3,4为直角边的直角三角形,直三棱柱的高为5,又底面直角三角形的周长为3+4+5=12,所以S 侧面=12×5=60,又S 底面=2×12×3×4=12,故该几何体的表面积S =60+12=72.故选A .5. 已知向量a →=(−1, 3),b →=(2, m),则“m =−1”是“b →⊥(a →+b →)”的( )A.充要条件B.充分不必要条件C.必要不充分条件D.既不充分也不必要条件 【答案】 B【考点】必要条件、充分条件与充要条件的判断 【解析】由b →⊥(a →+b →)”,可得b →⋅(a →+b →)=2+m(3+m)=0,解得m ,即可判断出结论. 【解答】a →+b →=(1, 3+m).∵ b →⊥(a →+b →)”,∴ b →⋅(a →+b →)=2+m(3+m)=0,解得m =−1或−(2)∴ “m =−1”是“b →⊥(a →+b →)”的充分不必要条件.6. (1−x)6(1−2x)4=a 0+a 1x +a 2x 2+...+a 10x 10,则a 0+a 1+.……+a 10的值为( ) A.0 B.2 C.−1 D.1 【答案】 A【考点】二项展开式的特定项与特定系数 二项式系数的性质 【解析】在已知二项式定理中,取x =1,即可求得a 0+a 1+……+a 10的值. 【解答】在(1−x)6(1−2x)4=a 0+a 1x +a 2x 2+...+a 10x 10中, 取x =1,可得a 0+a 1+……+a 10=(0)7. 已知α∈(π, 3π2),sinα=−√55,则tan(α+π4)的值为( )A.32B.−32C.3D.−3【答案】 C【考点】三角函数的恒等变换及化简求值 【解析】由题意利用同角三角函数的基本关系求得tanα的值,再利用两角和的正切公式求得tan(α+π4)的值. 【解答】 ∵ α∈(π,3π2),sinα=−√55,∴ cosα=−√1−sin 2α=−2√55,tanα=sinαcosα=12, 则tan(α+π4)=tanα+11−tanα=3,8. 已知直线ax +by +c −2=0(b >0, c >0)经过双曲线:y 2−x 24=1的上顶点,则4b +1c 的最小值是( )A.92B.4C.72D.2【答案】 A双曲线的特性 【解析】利用双曲线的简单性质,写出b 、c 的关系,然后利用基本不等式求解表达式的最小值即可. 【解答】直线ax +by +c −2=0(b >0, c >0)经过双曲线:y 2−x 24=1的上顶点,可得b +c =2,则4b+1c=12(4b+1c)(b +c)=12(5+4c b+b c)≥12(5+2√4c b×b c)=92,当且仅当b =2c 时,等号成立.9. 在如图的程序框图中,任意输入一次x(0≤x ≤2)与y(0≤y ≤2),则输出“恭喜中奖”的概率为( )A.π2B.π4C.π6D.π8【答案】 D【考点】 程序框图 【解析】根据程序框图转化为几何概型进行计算即可. 【解答】由程序框图知{0≤x ≤20≤y ≤2 ,求y ≤√1−(x −1)2的概率, 作出对应的图象如图: 则对应的概率P =π×1222×2=π8,10. 已知椭圆E 的中心为坐标原点O ,过右焦点F(2, 0)且在y 轴上的截距为−2的直线l 与椭圆E 交于A ,B 两点,以OA 和OB 为邻边作平行四边形OBCA ,其中OC |OC →|=(2√55,−√55),则椭圆E 的方程为( ) A.x 212+y 28=1 B.x 25+y 2=1 C.x 26+y 22=1D.x 28+y 24=1D【考点】 椭圆的定义 【解析】设椭圆的标准方程为:x 2a 2+y 2b 2=1(a >b >0).设A(x 1, y 1),B(x 2, y 2).直线l 的方程为:y =x −(2)联立{y =x −2x 2a 2+y 2b 2=1,化为:(a 2+b 2)x 2−4a 2x +4a 2−a 2b 2=0,由以OA 和OB 为邻边作平行四边形OBCA ,其中OC |OC →|=(2√55,−√55),可得OC →=OA →+OB →=(x 1+x 2, y 1+y 2)=(4a 2a 2+b2,−4b 2a 2+b 2).可得a 2=2b 2,又a 2−b 2=4,联立解得.【解答】设椭圆的标准方程为:x 2a 2+y 2b 2=1(a >b >0).设A(x 1, y 1),B(x 2, y 2). 直线l 的方程为:y =0−(−2)2−0x −2,化为:y =x −(2)联立{y =x −2x 2a 2+y 2b 2=1,化为:(a 2+b 2)x 2−4a 2x +4a 2−a 2b 2=0,△>0,x 1+x 2=4a 2a 2+b 2,∴ y 1+y 2=x 1+x 2−4,∵ 以OA 和OB 为邻边作平行四边形OBCA ,其中OC |OC →|=(2√55,−√55), ∴ OC →=OA →+OB →=(x 1+x 2, y 1+y 2)=(4a 2a 2+b 2,−4b 2a 2+b 2). ∴ a 2=2b 2,又a 2−b 2=4, 解得b 2=4,a 2=(8) ∴ 椭圆的标准方程为:x 28+y 24=(1)故选:D .11. 甲、乙、丙、丁四位同学中仅有一人申请了北京大学的自主招生考试.当他们被问到谁申请了北京大学的自主招生考试时,甲说:“丙或丁申请了”;乙说:“丙申请了”;丙说:“甲和丁都没有申请”;丁说:“乙申请了”.如果这四位同学中只有两人说的是对的,那么申请了北京大学的自主招生考试的同学是( ) A.甲 B.乙 C.丙 D.丁 【答案】 B【考点】进行简单的合情推理 【解析】本题主要考查逻辑推理,考查的核心素养是逻辑推理. 【解答】解:若是甲申请了,则甲、乙、丙、丁四人说的都是错的,不符合题意;若是乙申请了,则甲、乙两人说的都是错的,丙、丁两人说的都是对的,符合题意;若是丙申请了,则甲、乙、丙三人说的都是对的,只有丁一人说的是错的,不符合题意;若是丁申请了,则只有甲一人说的是对的,乙、丙、丁三人说的都是错的,不符合题意.综上可知,选B.故选B.12. 函数f(x)=x+e x|x|−e x的零点个数为()A.0B.1C.2D.3【答案】B【考点】函数零点的判定定理【解析】分类讨论,当x≥0时,根据函数的零点存在定理,可以判断f(x)在[0, +∞)有唯一的零点,再根据导数和函数的最值可以判断f(x)在(−∞, 0)上无零点,即可得到答案.【解答】当x≥0时,f(x)=x+xe x−e x,则f′(x)=1+e x+xe x−e x=1+xe x>0恒成立,∴f(x)在[0, +∞)上单调递增,∴f(x)≥f(0)=0+0−1=−1,∵f(1)=1>0,∴f(0)f(1)<0,∴f(x)在[0, +∞)有唯一的零点,当x<0时,f(x)=x−xe x−e x,则f′(x)=1−e x−xe x−e x=1−e x(2+x),设g(x)=1−e x(2+x),∴g′(x)=−e x(x+3),令g′(x)=0,解得x=−3,当x∈(−∞, −3)时,g′(x)>0,函数g(x)单调递增,当x∈(−3, 0)时,g′(x)<0,函数g(x)单调递增减,∴g(x)max=g(−3)=1+e−3>0,∵g(0)=−1,当x→−∞时,g(x)→1,g(−1)=1−1>0e∴存在x0∈(−1, 0)使得g(x0)=0,即1−e x0(2+x0)=0,当x∈(−∞, x0)时,f′(x)=g(x)>0,函数f(x)单调递增,当x∈(x0, 0)时,f′(x)=g(x)<0,函数f(x)单调递减,∴f(x)max=f(x0)=x0−x0e x0−e x0=x0−x0+1<0,x0+2∴f(x)在(−∞, 0)上无零点,综上所述,f(x)在R上有唯一的零点,故选:B.二、填空题:本题共4小题,每小题5分,共20分。
【全国省级联考】东北三省四市教研联合体2018届高三高考模拟(二)语文试题(解析版)
2018年东北三省四市教研联合体高考模拟考试(二)语文试题一、现代文阅读(一)论述类文本阅读阅读下面的文字,完成下面小题。
说武侠小说中的“江湖世界”为虚拟的世界,在于它过分夸大了“江湖世界”与“官府世界”各自的独立性,仿佛两者平行并立,互不干涉。
明清以来,中国的秘密社会名目繁多,晚清以来的武侠小说不少涉及近代中国的秘密社会。
而随着文人笔下秘密社会的日益理想化,武侠小说中的江湖世界俨然成为完全可与官府世界平分秋色的第二社会。
现实生活中“江湖”虽亦远离朝廷,却仍在官府管辖下,侠客也难得“道遥自在”。
像武侠小说中描写的那样,双方互不干涉内政,在“官府世界”遵守国家王法,在“江湖世界”则听从江湖规则,只能是小说家的良好愿望。
有趣的是,描写侠客“仗义疏财”“替天行道”的《水游传》促进了中国秘密社会的形成,而白莲教、天地会之类民间教门、会党的形成又反过来深刻影响了后世的武侠小说。
这种影响分虚、实两种,实者为小说家提供了无数侠客故事,虛者促使小说家在原有社会结构外,另建发挥特殊职能的“第二社会”。
而后者意义无疑更为重大,它使得武侠小说中的“江湖世界”既不完全蹈空,有近代中国秘密社会的影子,也不完全坐实,仍保留甚至着意渲染其作为法外世界的理想主义色彩。
江湖世界与朝廷治下的现实人生相比,俨然是两个世界、两套规矩。
可因为武侠小说的主角是侠客而不是清官,小说家实际上是用侠客纵横的“江湖世界”取代官府统治的现实世界。
江湖世界当然也有秩序和规则,但那是道德化了的“法律”,唯一的宗旨是扶危济困,惩恶扬善。
江湖上各家各派各有其清规戒律,不过,“崇尚义气”这一点几无例外。
江湖义气与朝廷王法一样,同为各自世界的最高规则。
倘是混迹江湖,那么完全可以将江湖义气置于朝廷王法之上。
将江湖义气作为道德化的“准法律”,是武侠小说家设计的理想社会图式。
不过,讲义气和主持正义并不是一回事,武侠小说家常常有意无意模糊两者的界限。
讲义气者只问亲琉,不论曲直,实际并不怎么值得赞赏。
东北三省四市2018届高三第二次联合模拟理科综合试题物理试题(解析版)
2018年东北三省四市高三第二次联合模拟理科综合试题物理部分一、选择题1. 关于原子结构的认识历程,下列说法正确的有()A. 汤姆孙发现电子后猜想出原子内的正电荷集中在很小的核内B. α粒子散射实验中少数α粒子发生了较大偏转是卢瑟福猜想原子核式结构模型的主要依据C. 卢瑟福的原子核式结构模型能够很好的解释光谱的分立特征和原子的稳定性D. 玻尔原子理论无法解释较复杂原子的光谱现象,说明玻尔提出的原子定态概念是错误的【答案】B点睛:本题考查原子物理中常识性问题,要在了解人类发现原子结构历史进程的基础上进行记忆,不能混淆。
2. 飞镖运动于十五世纪兴起于英格兰,二十世纪初,成为人们日常休闲的必备活动。
一般打飞镖的靶上共标有10环,第10环的半径最小。
现有一靶的第10环的半径为1cm,第9环的半径为2cm……以此类推,若靶的半径为10cm,在进行飞镖训练时目,当人离靶的距离为5m,将飞镖对准第10环中心以水平速度v 投出,g取10m/s2。
则下列说法正确的是()A. 当v≥50m/s时,飞镖将射中第8环线以内B. 当v=50m/s时,飞镖将射中第6环线C. 若要击中第10环的线内,飞镖的速度v至少为50m/sD. 若要击中靶子,飞镖的速度v至少为50m/s【答案】B【解析】A、当时,运动的时间,则飞镖在竖直方向上的位移,将射中第6环线,当时,飞镖将射中第6环线以内,故A错误,B正确;C、击中第10环线内,下降的最大高度为,根据得,,则最小初速度,故C错误;D、若要击中靶子,下将的高度不能超过,根据得,,则最小速度,故D错误。
点睛:飞镖水平飞出,做平抛运动,平抛运动在水平方向上做匀速直线运动,在竖直方向上做自由落体运动,高度决定运动时间,水平位移和时间决定初速度。
3. 如图,一圆环上均匀分布着电荷,在垂直于圆盘且过圆心c的轴线上有a、b、d三个点,a和b、b和c、c 和d间的距离均为R,在a点处有一电荷量为q(q>0)的固定点电荷,已知b点处的场强为零,则d点处场强为()A. 水平向左B. 水平向右C. 水平向左D. 水平向右【答案】D【解析】电荷量为q的点电荷在b处产生电场强度为,而半径为R均匀分布着电荷量为Q的圆盘上电荷,与在a点处有一电荷量为的固定点电荷,在b点处的场强为零,则圆盘在此处产生电场强度也为.那么圆盘在此d产生电场强度则仍为.而电荷量为q的点电荷在d处产生电场强度为,由于都在d处产生电场强度方向相同,即为两者大小相加.所以两者这d处产生电场强度为,方向水平向右,故选项D正确,ABC错误。
2018年东北三省四市高三第二次联合模拟理科综合试题(word)
2018年东北三省四市教研联合体高考模拟试卷(二)理科综合测试可能用到的相对原子质量:H 1 C 12 N 14 O 16 Ce 14第I卷一、选择題:本题共13小题,每小题6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.下列关于细胞中的化合物的叙述,正确的是A.蔗糖彻底水解的产物是CO2和H2OB.传递信息的蛋白质一定属于激素C.某些脂质可对生命活动起到调节作用D.细胞失水时,水分子只能向细胞外运输2.下列微生物的相关叙述,正确的是A.酵母菌的溶酶体中可以合成并储存多种水解酶B.肺炎双球菌的线粒体可以利用丙酮酸进行有氧呼吸C.真菌分泌纤维素酶时,需自身的生物膜系统参与D.利用乳酸菌进行发酵时,应先通入空气使其大量增殖3.某种生活在我国北方的蚜虫通过吸食落叶乔木幼嫩枝叶的汁水来生活,如图为不同月份温度对蚜虫种群数量的影响。
食蚜蝇和瓢虫以蚜虫为食,蚂蚁从蚜虫处获得蜜露,并赶走食蚜蝇和瓢虫。
下列说法错误的是A.图中数学模型的数据来自样方法B.6月之前蚜虫种群的生活环境阻力很小C.蚜虫种群数量速降的主要原因是天敌增多D.这些生物之间存在着4种种间关系4.下列有关免疫的说法,错误的是A.注射抗体治疗疾病时,可能会出现过敏反应B.靶细胞因抗原增殖而被裂解的过程属于细胞凋亡C.吞噬细胞可参与体液免疫和细胞免疫过程D.免疫活性物质可由非免疫细胞合成5.下列关于细胞增殖的叙述,不正确的是A.细胞均通过有丝分裂、无丝分裂和减数分裂进行增殖B.减数分裂可以为生物进化提供丰富的原材料C.有丝分裂对于生物性状的稳定遗传具有重要作用D.细胞增殖过程中,一定有三个方向的遗传信息流6.下图为人类的一种单基因遗传病系谱图。
下列相关叙述错误的是A.此病致病基因一定在常染色体上B.若Ⅲ-6患病,此病可能为伴X染色体隐性遗传病C.若此病为隐性病,则图中所有正常个体均为杂合子D.若此病为显性病,则Ⅱ-2的细胞中最少含有1个致病基因7.化学与社会、生活密切相关,下列说法不正确的是A.糖类物质均含有相同的官能团B.酯类物质是形成水果香味的主要成分C.“可燃冰”的主要成分是甲烷和水,我国是最早海域试采获稳定产气成功的国家D.持续加热到一定温度能杀死甲型HIN1流感病毒是因为病毒的蛋白质受热变性8.设N A为阿伏加德罗常数的值,下列说法正确的是A.lmol/ L FeCl3溶液中,Fe3+的数目小于N AB.常温常压下,1.7gNH3中含有的原子数为0.4N AC.标准状况下,4.48LCl2通人水中,转移的电子数为0.2N AD.100g质量分数为17%的H2O2溶液含有的氧原子数目为N A9.下列说法正确的是A.利用水可以鉴别乙醇、乙酸和乙酸乙酯B.环己烷分子中碳原子可能都处于同一平面C.的化学名称为:2,3,3-三甲基丁烷D.分子式为C5H11C1且含有两个甲基的同分异构体共4种10.最近报道了一种新型电池,放电时的总反应为:A1+3Cn[AlC4]+4AlCl4ˉ=4Al2Cl7ˉ+3Cn,其中Cn表示石墨,电解质为某种有机阳离子(R+)和AlCl4ˉ组成的离子液体。
东北三省四市2018届高三第二次大联考_数学 精品
东北三省四市2018届高三教学质量检测(二)数学(理)试题命 题:东北三省四市联合命制时间:120分钟 总分:150分本试卷分第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)两部分,其中第Ⅱ卷第(22)题~第(24)题为选考题,其它题为必考题.考生作答时,将答案答在答题卡及答题纸上,在本试卷上答题无效.考试结束后,将本试卷和答题卡(纸)一并交回.第I 卷一、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,只有一项是符合题目要求的,请用2B 铅笔把答题卡上对应题目的答案标号涂黑. (1)已知集合{}1,0,A a =-,{}|01B x x =<<,若AB ≠∅,则实数a 的取值范围是A.{}1B.(,0)-∞C.(1,)+∞D.(0,1) (2)设等比数列{}n a 的公比2q =,前n 项和为n S ,则43S a 的值为 A.154 B.152C. 74 D.72(3)已知复数1cos23sin 23z i =+和复数2cos37sin37z i =+,则21z z ⋅为A .i 2321+B .i 2123+C .i 2321-D .i 2123-(4)已知命题p :抛物线22x y =的准线方程为21-=y ;命题q :若函数)1(+x f 为偶函数,则)(x f 关于1=x 对称.则下列命题是真命题的是A .q p ∧ B.)q (p ⌝∨ C.()()p q ⌝∧⌝ D.q p ∨(5)等差数列{}n a 的首项为1a ,公差为d ,前n 项和为n S .则“1||d a >”是“n S 的最小值为1S ,且n S 无最大值”的A .充分不必要条件B .必要不充分条件C .充要条件 D(6)已知图象不间断的函数)(x f 是区间],[b a 且在区间(,)a b 上存在零点.图1是用二分法求()0f x =近似解的程序框图,下四个选择:①0)()(<m f a f ; ②0)()(>m f a f ; ③0)()(<m f b f ; ④0)()(>m f b f其中能够正确求出近似解的是( ) 第二节 ①、③ B .②、③ C .①、④ D .②、④(7)若1(3)nx x-展开式中各项系数之和为32,则该展开式中含3x 的项的系数为A.5-B.5C.405-D.405 (8)设函数()2cos()23f x x ππ=-,若对于任意的x R ∈, 都有12()()()f x f x f x ≤≤,则12x x -的最小值为A .4B .2C .1D .12(9)在送医下乡活动中,某医院安排3名男医生和2名女医生到三所乡医院工作,每所医院至少安排一名医生,且女医生不安排在同一乡医院工作,则不同的分配方法总数为A .78B .114C .108 D. 120 (10)设3()f x x x =+,x R ∈. 若当02πθ≤≤时,0)1()sin (>-+m f m f θ恒成立,则实数m 的取值范围是A .(0,1)B .)0,(-∞C .)21,(-∞ D .)1,(-∞(11)已知O 为坐标原点,点M 的坐标为(,1)a (0a >),点(,)N x y 的坐标x 、y 满足不等式组⎪⎩⎪⎨⎧≤≥-+≤-+1033032y y x y x . 若当且仅当30x y =⎧⎨=⎩时,OM ON ⋅取得最大值,则a 的取值范围是A.1(0,)3B.1(,)3+∞C.1(0,)2D.1(,)2+∞图1(12)已知函数321,(,1]12()111,[0,]362x x x f x x x ⎧∈⎪+⎪=⎨⎪⎪-+∈⎩,函数()⎪⎭⎫ ⎝⎛=x πsin a x g 622+-a (a >0),若存在12[0,1]x x ∈、,使得12()()f x g x =成立,则实数a 的取值范围是A .14[,]23B .1(0,]2C .24[,]33D .1[,1]2第Ⅱ卷本卷包括必考题和选考题两部分,第(13)题~第(21)题为必考题,每个试题考生都必须做答.第(22)题~第(24)题为选考题,考生根据要求做答.二、填空题:本大题共4小题,每小题5分,共20分.请把答案填在答题纸相应的位置上. (13)231dx x--=⎰. (14)已知双曲线12222=-by a x 左、右焦点分别为21F F 、,过点2F 作与x 轴垂直的直线与双曲线一个交点为P ,且621π=∠F PF ,则双曲线的渐近线方程为.(15)对于命题:若O 是线段AB0=⋅+⋅ 将它类比到平面的情形是: 若O 是△ABC 内一点,则有 将它类比到空间的情形应该是: 若O 是四面体ABCD 内一点,则有.(16) 已知一个三棱锥的三视图如图2所示,其中俯视图是顶角为120的等腰三角形,则该三棱锥的外接球体积为. 三、解答题:本大题共70分.(17)(本小题满分12分)如图3,ABC ∆中,,AB ,ABC sin2332==∠ 点D 在线段AC 上,且334,2==BD DC AD (Ⅰ)求BC 的长; (Ⅱ)求DBC ∆的面积. 左视图主视图1223.S S S OBA OCA OBC =⋅+⋅+⋅(18)(本小题满分12分) 如图4,三棱柱111ABC ABC -中,侧面11AAC C ⊥底面ABC ,112,AA AC AC ABBC ====,且A B B C ⊥,O 为AC 中点.(Ⅰ)在1BC 上确定一点E ,使得//OE 平面1A AB ,并说明理由;(Ⅱ)求二面角11A A B C --的大小.(19)(本小题满分12分)某科考试中,从甲、乙两个班级各抽取10名同学的成绩进行统计分析,两班成绩的茎叶图如图5所示,成绩不小于90分为及格. (Ⅰ)甲班10名同学成绩的标准差 乙班10名同学成绩的标准差(填“>”,“<”);(Ⅱ)从两班10名同学中各抽取一人,已知有人及格,求乙班同学不及格的概率;(Ⅲ)从甲班10人中取一人,乙班10人中取两人,三人中及格人数记为X ,求X 的分布列和期望.(20)(本小题满分12分)已知椭圆2222:1x y C a b +=(0)a b >>的离心率为2,以原点为圆心,椭圆的短半轴长为半径的圆与直线0x y -=相切.(Ⅰ)求椭圆C 的方程;(Ⅱ)若过点M (2,0)的直线与椭圆C 相交于两点,A B ,设P 为椭圆上一点,且满足t =+(O 为坐标原点)-<3时,求实数t 取值范围. 甲1A C A 1B 1C O(21)(本小题满分12分)已知()ln(1)()xf x e mx x R =+-∈.(Ⅰ)已知对于给定区间(,)a b ,存在0(,)x a b ∈使得)()()(0x f ab a f b f '=--成立,求证:0x 唯一;(Ⅱ)若1212,x x R x x ∈≠,,当1m =时,比较12()2x x f +和12()()2f x f x +大小,并说明理由;(Ⅲ)设A 、B 、C 是函数()ln(1)(,1)xf x e mx x R m =+-∈≥图象上三个不同的点, 求证:△ABC 是钝角三角形.请考生在(22)、(23)、(24)三题中任选一题做答,如果多做,则按所做的第一题记分. 做答时,用2B 铅笔在答题卡上把所选题目对应的标号涂黑. (22)(本小题满分10分)选修4-1:几何证明选讲如图6,直线AB 过圆心O ,交圆O 于A 、B ,直线AF 交圆O 于F (不与B 重合),直线l 与圆O 相切于C ,交AB 于E ,且与AF 垂直,垂足为G ,连接AC .求证:(Ⅰ)CAG BAC ∠=∠; (Ⅱ)AF AE AC ⋅=2.(23)(本小题满分10分)选修4—4:坐标系与参数方程平面直角坐标系中,将曲线⎩⎨⎧==αsin y αcos x 4(α为参数)上的每一点纵坐标不变,横坐标变为原来的一半,然后整个图象向右平移1个单位,最后横坐标不变,纵坐标变为原来的2倍得到曲线1C . 以坐标原点为极点,x 的非负半轴为极轴,建立的极坐标中的曲线2C 的方程为θρsin 4=,求1C 和2C 公共弦的长度.(24)(本小题满分10分)选修4-5:不等式选讲对于任意实数)0(≠a a 和b ,不等式|)2||1(||||2|||-+-≥-++x x a b a b a 恒成立,试求实数x 的取值范围.参考答案说明:一、本解答给出了一种或几种解法供参考,如果考生的解法与本解答不同,可根据试题的主要考查内容比照评分标准制订相应的评分细则.二、对解答题,当考生的解答在某一步出现错误时,如果后继部分的解答末改变该题的内容和难度,可视影响的程度决定后继部分的给分,但不得超过该部分正确解答应得分数的一半;如果后继部分的解答有较严重的错误,就不再给分.三、解答右端所注分数,表示考生正确做到这一步应得的累加分数. 四、只给整数分数,选择题和填空题不给中间分. 一、选择题:本大题共12小题,每小题5分,共60分.(1)D (2)A (3)A (4)D (5) A (6)C (7)C (8)B (9)B (10)D (11)D (12)A 二、填空题:本大题共4小题,每小题5分,共20分. (13)2ln3(14)x y 2±= (15) ·+ ·+ ·+ ·=(16)π3520 三、解答题:本大题共共70分. (17)(本小题满分12分) 解:(Ⅰ)因为332sin=∠ABC ,所以313121=⨯-=∠ABC cos .2分 在ABC ∆中,设b AC a BC 3,==, 则由余弦定理可得a a b 344922-+= ①5分 在ABD ∆和DBC ∆中,由余弦定理可得b b ADB 331643164cos 2-+=∠, b a b BDC 338316cos 22-+=∠.7分 V ACD O -V BCD O -V ABD O -V ABC O -因为BDC ADB ∠-=∠cos cos ,所以有b a b b b 338316331643164222-+-=-+,所以6322-=-a b ② 由①②可得1,3==b a ,即3=BC .9分(Ⅱ)由(Ⅰ)得ABC ∆的面积为223223221=⨯⨯⨯, 所以DBC ∆的面积为322.12分 (注:也可以设b BC a BA==,,所以b a 3231+=,用向量法解决;或者以B 为原点,BC 为x 轴建立平面直角坐标系,用坐标法解答;或者过A 作BC 平行线交BD 延长线于E ,用正余弦定理解答.具体过程略)(18)(本小题满分12分) 解:(Ⅰ)E 为1BC 中点.2分证法一:取BC 中点F ,连接EF OF ,.3分所以可得1//,//BB EF AB OF ,所以面//OEF 面1A AB .5分 所以//OE 平面1A AB .6分 证法二:因为11A A AC =,且O为AC 的中点,所以1AO AC ⊥.又由题意可知, 平面11AAC C ⊥平面ABC ,交线为AC , 且1A O ⊂平面11AA C C ,所以1A O ⊥平面ABC . 以O为原点,1,,OB OC OA 所在直线分别 为x ,y ,z 轴建立空间直角坐标系.…………1分 由题意可知,112,A A AC AC ===又,AB BC AB BC =⊥1,1,2OB AC ∴==所以得:11(0,0,0),(0,1,0),(0,1,0),(1,0,0)O A A C C B - 则有:11(0,1,3),(0,1,3),(1,1,0)A C AA AB =-==.2分 设平面1AA B 的一个法向量为(,,)xy z =n ,则有10000AA y x y AB ⎧⎧⋅=+=⎪⎪⇔⎨⎨+=⎪⋅=⎪⎩⎩n n ,令1y =,得1,x z =-=1所以(1,1,=-n .4分 设0001(,,),,E x y z BE BC λ==即000(1,,)(x y z λ-=-,得00012x y z λλ⎧=-⎪=⎨⎪⎩所以(1,2),E λλ=-得(1,2),OE λλ=-由已知//OE 平面1A AB , 得=0OE ⋅n , 即120,λλλ-++-=得12λ=. 即存在这样的点E ,E 为1BC 的中点.6分(Ⅱ)由法二,已知)0,2,0(),3,0,1(111=-=C A A ,设面11BC A 的法向量为),,(c b a,则00111==C A A ⎩⎨⎧==-⇔0203b c a ,令3=c )3,0,3(.8分所以cos 371213⋅--=772.10分由图可得二面角11A A B C --的大小为arccos(.12分 (19)(本小题满分12分) 解:(Ⅰ)>.2分(Ⅱ)甲班有4人及格,乙班有5人及格.事件“从两班10名同学中各抽取一人,已知有人及格”记作A , 事件“从两班10名同学中各抽取一人,乙班同学不及格”记作B ,则7210030110020)()()|(=-==A PB A P A B P .6分 (Ⅲ)X 取值为0,1,2,3152)0(2102511016=⋅==C C C C X P ;4519)1(2102511014210151511016=⋅+⋅==C C C C C C C C C X P ; 4516)2(2101515110142102511016=⋅+⋅==C C C C C C C C C X P ;454)3(2102511014=⋅==C C C C X P .10分 所以X 的分布列为所以545)(==X E .12分(20)(本小题满分12分)解:(Ⅰ)由题意知2c e a ==所以22222212c a b e a a -===. 即222a b =.2分 又因为1b ==,所以22a =,21b =. 故椭圆C 的方程为1222=+y x .4分 (Ⅱ)由题意知直线AB 的斜率存在.设AB :(2)y k x =-,11(,)A x y ,22(,)B x y ,(,)P x y ,由22(2),1.2y k x x y =-⎧⎪⎨+=⎪⎩得2222(12)8820k x k x k +-+-=. 422644(21)(82)0k k k ∆=-+->,212k <.6分 2122812k x x k +=+,21228212k x x k-=+. ∵t =+,∴1212(,)(,)x x y y t x y ++=,21228(12)x x k x t t k +==+, 1212214[()4](12)y y ky k x x k t t t k +-==+-=+. ∵点P 在椭圆上,∴222222222(8)(4)22(12)(12)k k t k t k -+=++, ∴22216(12)k t k =+.8分-<312x -<,∴22121220(1)[()4]9k x x x x ++-<∴422222648220(1)[4](12)129k k k k k -+-<++,∴22(41)(1413)0k k -+>,∴214k >.10分 ∴21142k <<,∵22216(12)k t k =+,∴222216881212k t k k ==-++,∴2t -<<2t <<, ∴实数t 取值范围为)2,362()362,2( --.12分 (注意:可设直线方程为2-=x my ,但需要讨论0m =或0m ≠两种情况) (21)(本小题满分12分)解:(Ⅰ)证明:假设存在,使得,且0000),(,x x b a x x ≠'∈' )()()(0x f a b a f b f '=-- ,)'()()(0x f a b a f b f '=-- ,即)()(00x f x f ''=' . 1分 ∵)()(1)(x f x g m e e x f x x '=-+=',记,∴],[)(,0)1()(2b a x f e e x g x x是'>+='上的单调增函数(或者通过复合函数单调性说明)('x f 的单调性). 3分∴0000x x x x ≠''=,这与矛盾,即0x 是唯一的. 4分 (Ⅱ) 1212()()(),22x x f x f x f ++<原因如下: (法一)设,,2121x x R x x <∈,且 则1212121221212()()2()ln(1)ln(1)2[ln(1)]22x x x x x x x x f x f x f e e x x e ++++-=+++---+- 121222ln(1)(1)ln(1)x x x x e e e+=++-+121212122ln(1)ln(12)x x x x x x x x e e eee +++=+++-++.5分∵2212121212122,0,0x x x x x x x x eee ee x x ee+=>+∴≠>>,且.6分∴1+21212111221x x x x x x x x e eee e +++++>++,121212121212121222ln(1)ln(12),ln(1)ln(12)0.x x x x x x x x x x x x x x x x e e eee e e e ee ++++++∴+++>++∴+++-++>12121212()()()()2(), ()222x x x x f x f x f x f x f f +++∴+>∴<.8分 (法二)设2)()()2()(22x f x f x x f x F +-+=,则2)(')2('21)('2x f x x f x F -+=. 由(Ⅰ)知)('x f 单调增.所以当2x x >即x x x <+22时,有02)(')2('21)('2<-+=x f x x f x F 所以2x x >时,)(x F 单调减.5分当2x x <即x x x >+22时,有02)(')2('21)('2>-+=x f x x f x F 所以2x x <时,)(x F 单调增.6分所以0)()(2=<x F x F ,所以2)()()2(2121x f x f x x f +<+.8分 (Ⅲ)证明:设321332211),(),,(),,(x x x y x C y x B y x A <<,且,因为1≥m ∵R x x f e m m e e x f x x x ∈∴<+--=-+='是,)(01111)(上的单调减函数.9分 ∴123()()()f x f x f x >>.∵)),()(,()),()(,(23232121x f x f x x BC x f x f x x BA --=--= ∴))()())(()(())((23212321x f x f x f x f x x x x BC BA --+--=⋅.10分 ∵,0)()(,0)()(,0,023212321<->->-<-x f x f x f x f x x x x ∴B B ∠<∴<⋅,0cos ,0为钝角. 故△ABC 为钝角三角形.12分(22)(本小题满分10分)选修4-1:几何证明选讲证明:(Ⅰ)连结BC , AB 是直径,∴ 90=∠ACB ,∴90ACB AGC ∠=∠=. …2分GC 切圆O 于C ,∴GCA ABC ∠=∠. …4分 ∴BAC CAG ∠=∠. …………………………5分(Ⅱ)连结CF , EC 切圆O 于C ,∴AFC ACE ∠=∠. ……………………………6分又,CAG BAC ∠=∠∴ACF ∆∽AEC ∆. …8分∴AF AE AC ACAF AE AC ⋅=∴=2,. …………10分(23)(本小题满分10分)选修4—4:坐标系与参数方程解:曲线⎩⎨⎧==αsin y αcos x 4(α为参数)上的每一点纵坐标不变,横坐标变为原来的一半得到⎩⎨⎧==αy αx sin cos 2,1分然后整个图象向右平移1个单位得到⎩⎨⎧=+=αy αx s in 1c os 2,………………………………2分 最后横坐标不变,纵坐标变为原来的2倍得到⎩⎨⎧=+=αy αx sin 21cos 2,3分 所以1C 为4)1(22=+-y x ,4分又2C 为θρsin 4=,即y y x 422=+,5分所以1C 和2C 公共弦所在直线为0342=+-y x ,7分所以)0,1(到0342=+-y x 距离为25, 所以公共弦长为114542=-.10分(24)(本小题满分10分)选修4-5:不等式选讲 解:原式等价于|212-+-≥-++|x ||x |a|b||a b||a ,设t ab =, 则原式变为|2||1||12||1|-+-≥-++x x t t 对任意t 恒成立.2分 因为⎪⎪⎪⎩⎪⎪⎪⎨⎧-≤-<<-+-≥=-++132112213121t ,t t ,t t ,t |t ||t |,最小值为21=t 时取到,为23.6分所以有23≥=-+-21x x ⎪⎩⎪⎨⎧≤-≥-1232<<11232x,x ,x ,,x x 解得]49,43[x ∈.10分。
2018届东北三省三校高三第二次联合模拟考试英语试卷(有答案)
2018年高三第二次联合模拟考试英语试卷第二部分阅读理解(共两节,满分40分)第一节(共15小题;每小题2分,满分30分)阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡上将该项涂黑。
ASouth Ayrshire Council holiday clubs have a jam-packed, exciting and fun-filled program of activities and outings for your child to participate in.The holiday clubs operate at the following locations:Mossblown Care Club, Mauchline Road, Mossblown. Tel:079-7112-0465Dundonald Care Club, Castle Drive, Dundonald. Tel:077-7294-4225The holiday clubs are operated by qualified staff and registered with the Scottish Care Inspectorate.InformationOpen: Monday to Friday 8-00 am—6-00pm, from Monday 14 to Monday 21October (inclusive) Costs: £18 per day(8-00 am—6:00 pm)£ 10 per half day (8*00 am —1:00 pm or 1:00 pm—6:00 pm)£ 80 full weekPlease note that bookings MUST be made 2 weeks in advance and paid in FULL.Information is available in your local CareClub by email from ChildcareServices@south-ayrshire. gov, uk or alternatively by contacting the Childcare Services Team. Call012-9261 -2029, if you wish a booking form tobe mailed to you.Holiday Childcare ProgramDundonald Care Club (available at Dundonald only)full or half day booking is available. Weathernot permitting. a suitable alternative activitymay be provided.21. If you go to the Dundonald Care Club on Monday and Friday, you at least pay ________________A. £ 36B. £28C. £98D. £ 9022. What will visitors do at 8:00 am—1*00 pm,16 October?A. Make Halloween crafts.B. Do some sports activities.C. Prepare some sweet treats.D. Have a West FM Studio Tour.23. What information can we learn from the哈尔滨师大附中东北师大附中辽宁省实验中学passage?A. There are no activities at weekends.B. Outings are the center of the program.C. The activity will be cancelled in bad weather.D. The booking is available from 14 to 21 October.BThe morning she left for Camp Kanawa, Maria awoke with an ache in her stomach. She had gone on plenty of parties. She’d even spent a whole weekend at Aunt Jolie and Uncle Ed’s. So what happened to her?No breakfast today, she thought, imagining the ache turning into throwing up and a horrible road trip after a full meal. As usual, Maria felt hungry as soon as the room smelled of French toast. On the other hand, maybe a good breakfast was exactly what she needed.“There’s my big camper!’’ said her mom. Then, she walked to the stove, placed two pieces of French toast on a plate and powdered sugar snowing down. “Just like you like it. ’’ At the meanwhile, Maria was already in position, armed with knife, fork, napkin and full glass of milk.‘‘Get started while it’s hot. Your father’s coming down in a minute. I told him to shave. Don’t want the bear—I mean, the bushy black beard.“Okay,okay,” Maria’s dad said with a smile. “Clean a s a whistle. Just like you ordered.”“Really?” Maria’s mom shrugged (耸肩).“I think it’s fashionable,” Maria said, dipping a bite in some syrup (糖桨).“Well, your old man is fashionable,”herdad said, moving his head the way he did whenhe wanted to look like a cool surfer man but looked more like an Egyptian robot. “In fact, Iwas the most popular kid at my camp.”“For the record, it was a science camp,”Maria’s mother reminded her, looking her straight in the eyes. “In all seriousness, Maria, popularity is not important and finding the people who like you for you—that’s what matters.”“Your mom speaks the truth, Sugar,” said Maria’s dad,wiping his thick beard with a napkin. “Just be yourself. You’ 11 definitelyenjoy it.24. What probably led to Maria’s hes itation toeat breakfast?A. The lack of adequate nutrition.B. TheC. The inviting smell of French toast.D. The25. What is Maria’s attitude towards her father’s beard?A. Favorable.B. Disapproving.C. Concerned.D. Uncaring.26. Why did Maria’s mother remind her thather father went to a science camp?A. To advise Maria not to focus on popularity.B. To share her similar experience with Maria.C. To emphasize the importance of science to Maria.D. To persuade Maria not to discuss subjects except science.27. What is the best title for the text? A. Father ’s beard B. A wonderful breakfast C. Family talk about a camp D. Maria ’s dream to be a big camperCSpending money on time-saving services reduces stress and boosts(增进) happiness, according to a new research, but shockingly, few of us do it.Whillans, a professor at HBS said, “Buying time helps to protect us from the stress in our lives caused by time pressure, and the feeling that we don ’t have enough minutes in the day to complete our tasks.’’The effect was clearest in the Canadian experiment, in which 60 working adults were given $40 to spend in two different ways. One weekend, they were told to spend the money on a material purchase —a gift for themselves. The next weekend, they were instructed to spend the $40 on anything that saved them time ,from paying the neighbor ’s kid to run errands (跑腿)to taking an Uber instead of a bus.On the day they made the time-saving purchase, they felt happier, in a better mood, and lower feelings of time stress than on the day they bought a material purchase,’’ said Whillans.The biggest surprise to the researchers was how few people would spend money on time-saving services. When they asked 98 working adults how they would spend a “windfall” of $40,only two percent named a purchase that would save them time.“One reason ,’’ said Whillans, “is thatwe’re very bad at remembering how much wehate doing certain tasks once the suffering has passed. That makes us less likely to take active steps to avoid that overburdened feeling in the future.” But another possible cause is good old-fashioned guilt. “If you feel guilty about getting someone to clean your house for you, then you might get less happiness from outsourcing (外包)that task ,” said Whillans, “or you might just be less likely to spend your money in that way.’’28. In the Canadian experiment, the participants _____.A. were divided into two groupsB. were given $ 40 every two weeksC. were asked to give money to a neighbor ’s kidD. were asked to spend the money in different ways29. According to the author, what can make people less time-stressed?A. Paying much for a concert ticket.B. Taking a regular bus to get to work.C. Employing someone to clean the garden.D. Buying themselves an expensive present.30. When it comes to spending money on ‘‘buying time”, _____.A. no people would like to do itB. a small percentage of people choose to do itC. more people will do it if extra money is givenD. most people like the idea but don ’t practice it in life31. What do the underlined words “that overburdened feeling” in Paragraph 6 refer to?A. The good old-fashioned guilt.B. The feeling of spending money on goods.C. The stress of having someone clean your house.D. The discomfort when completing tasks we hate doing.DWe Brits love the idea of a real Christmas tree—but not so many of us like the realities of dragging a 7ft Norway Spruce through the house and leaving needles all over the place.If you count yourself among the reluctant group, then it may be time to go fake (假的). After all, buying an artificial Christmas tree needn’t mean accepting defeat. There’s a huge range of options and sizes, including pre-lit trees, which will save you the frustration of trying to string your own lights.Another big bonus of choosing an artificial Christmas tree is cost: artificial trees can last for decades, so they work out cheaper than paying for a real tree every year. Like now retailers (零售商) are offering great deals at the moment: at Tesco, there’s 25 percent off artificial Christmas trees. Meanwhile, you can take advantage of the current 3 for 2 offer at Argos to fill your house with not one, not two, but three. You may perhaps partner up with friends who are also looking to invest.Of course, keep your tree for years and years and it will start to pay you back in terms of carbon footprint; however, a “real” one will always have to be transported, used and dealt with every year.Are there any downsides? Yes. You might think you, re saving the planet, but a fake tree is actually not an environmentally friendly option. Most are made in factories in Asia, resulting in some serious air miles to reach the UK. They’ re made from metal and plastic, and many end their lives in landfill.Another problem with a fake tree is that they don’t look very natural—and of course you won’t get that lovely pine smell either. You’11 also need to find space for storage. 32. What does the underlined word “reluctant” in paragraph 2 probably mean?A. Passive.B. Related.C. Unwilling.D. Supportive.33. Which is the benefit of buying an artificial Christmas tree?A. Abundant choices.B. The lovely pine smell.C. Cheaper than a real one.D. Free for transportation.34. What can we learn from the passage?A. Fake Christmas trees are environmentally friendly.B. British people like to drag a real Christmas tree home.C. People need to find space to store a fake Christmas tree.D. People may get 3 more if they buy two fake Christmas trees.35. What is the passage mainly about?A. Different reasons for choosing fake Christmas trees.B. Valuable suggestions on choosing fake Christmas trees.C. Efficient ways of saving money on choosing Christmas trees.D. Advantages and disadvantages of choosing fake Christmas trees.第二节(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。
2018年东北三省四市教研联合体高考模拟试卷(二)
2018年东北三省四市教研联合体高考模拟试卷(二)英语(考试时间:120分钟试卷满分:150分)注意事项:1. 本试卷由四个部分组成。
其中,第一、二部分和第三部分的第一节为选择题。
第三部分的第二节和四部分为非选择题。
2.答卷前,考生务必将自己的姓名、准考证号码填写在答题卡上。
3.回答选择题时,选出每小题答案后,用2B铅笔把答题卡对应题目的答案标号涂黑;回答非选择题时,将答案写在答题卡上,写在本试卷上无效。
4.考试结束后,将本试卷和答题卡一并交回。
第一部分听力(共两节,满分30分)第一节(共5小题;每小题l.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B。
1. What can we learn from the conversation?A. The woman doesn’t mind.B. The woman can do much.C. The woman has to agree.2. Where are the two speakers?A. In the office.B. On the phone.C. At home.3. What was the relationship between the hero and heroine in the play?A. Husband.B. Brother and sister.C. Strangers.4. What are the two speakers going to do tomorrow afternoon?A. Go to the park.B. Go shopping.C. See Joe and Linda.5. How much will the woman pay for the chicken?A. $5.25.B. $10.44.C. $15.75. 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。
【全国百强校】东北三省三校2018届高三第二次模拟考试理科综合试题.pdf
平弹簧,弹簧处于压缩的状态,且弹簧的弹力为
3N ,整个装置处于静止状态,现给小车施加一
水平向左的恒力 F,使其以 2m/s2 的加速度向左做匀加速直线运动,则
A .物块一定会相对小车向右运动 B.物块受到的摩擦力一定减小 C.物块受到的摩擦力大小一定不变 D .物块受到的弹簧弹力一定增大 18.如图所示,光滑水平面与光滑半球面相连, O 点为球心,一轻绳跨过光滑小滑轮连接物块 A 、 B, A 、 B 质量相等可视为质点,开始时 A 、 B 静止,轻绳水平伸直, B 与 O 点等高,释放 后,当 B 和球心 O 连线与竖直方向夹角为 30°时, B 下滑速度为 v,此时 A 仍在水平面上,重 力加速度为 g,则球面半径为
A .雌蜂均为黄绿色眼 C .雄蜂均为褐色眼
B 雌蜂中褐色眼黄绿色眼 =1 : 1: 1 D .雄蜂中褐色眼:黄绿色眼 =1 :1
7、下列说法不正确的是
A. 聚氯乙烯可以制食物保鲜膜
B. 铝热反应可用于焊接钢轨
C.液氯可以保存在钢瓶中
D. 常温下可用铁槽车运输浓硫酸
8、解释下列事实的方程式正确的是 A. 纯碱溶液显碱性: CO 32-+2H 2O B. 用稀硝酸清洗试管内壁附着的银:
的电压表 V 进行逐个校对,原有实验器材可用,请在虚线框中画出你设计的实验电路图
____________。 24.如图所示,一倾角为 θ =30 °的上表面光滑的斜面上,有相距为
L 的 A 、 B 两点,质量为
m=1kg 可视为质点的物块, 在 F1=11N ,方向沿斜面向上的力的作用下, 从 A 点由静止运动到 B
点,所经历时间 t1=1s,到 B 点时换成了沿斜面向下的力 F2 的作用, 经过时间 t2=2s 后返回 A 点,
【全国大联考】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
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理综化学试题【试卷整体分析】考试范围:高考范围难度:较难【题型考点分析】第I卷(选择题)1.下列说法不正确的是A.聚氯乙烯可以制食物保鲜膜B.铝热反应可用于焊接钢轨C.液氯可以保存在钢瓶中D.常温下可用铁槽车运输浓硫酸【答案】A【解析】A.聚氯乙烯塑料有毒不能做食物保鲜膜,故A错;B.铝热反应可以炼铁并放出大量的热,可用于焊接钢轨,故B正确;C.液氯易液化不和铁反应,所以可以保存在钢瓶中。
故C对;D常温下浓硫酸与铁发生钝化反应,所以可以用铁槽车运输浓硫酸,故D对。
答案:A。
2.解释下列事实的方程式正确的是A.纯碱溶液显碱性:CO32-+2H2O H2CO3+2OH-B.用稀硝酸清洗试管内壁附着的银:Ag+2H++NO3-=Ag++NO2↑+H2OC.向煤中加入石灰石可减少煤燃烧时SO2的排放:CaCO3+O2+SO2= CO2+CaSO4D.碳酸氢钠溶液与过量澄清石灰水混合出现白色沉淀:HCO3-+Ca2++OH-=CaCO3↓+H2O【答案】D【解析】A.纯碱溶液显碱性:CO32-+H2O HCO3-+OH-,故A错;B.用稀硝酸清洗试管内壁附着的银:点睛:本题考查碳酸钠和碳酸氢钠的性质。
碳酸根水解显碱性,碳酸氢根与酸和碱都不能共存。
还考查了亚硫酸盐的不稳定性,例CaCO3+O2+SO2= CO2+CaSO4,易被氧化为硫酸盐。
3.2017年1月1日屠呦呦因发现青蒿素可以抵御疟疾感染而获得诺贝尔奖。
如图所示的有机物是制备青蒿素的重要原料,下列有关该有机物的说法不正确的是A.分子式为C21H28O2B.能溶于水,属于芳香烃C.可使酸性高锰酸钾溶液褪色D.苯环上的一氯取代物有3种【答案】B点睛:抓住官能团的特征进行判断物质类别。
例芳香烃的特点含苯环,只有碳氢元素组成。
一氯代物同分异构体的判断方法是通过结构简式找出含有氢的种类。
东北三省四市2018届高三高考第二次模拟考试理科综合物理试题
东北三省四市2018届高三高考第二次模拟考试理科综合物理试题二、选择题:本题共8小题,每小题6分。
在每小题给出的四个选项中,第14—17题只有一项符合题目要求,第18~21题有多项符合题目要求。
全部选对的得6分,选对但不全的得3分,有选错的得0分。
14.下列说法正确的是A.太阳辐射的能量主要来自太阳内部的核裂变反应B.黑体辐射的实验规律可用光的波动性解释C.一束光照到某金属上,不能发生光电效应,是因为该束光的频率低于极限频率D.氢原子从较低能级跃迁到较高能级时,棱外电子的动能增大,势能减小15.比邻星是离太阳系最近(距离太阳4.2光年)的一颗恒星。
据报道:2018年天文学家在比邻星的宜居带发现了一颗岩石行星——比邻星b,理论上在它的表面可以维持水的存在,甚至有可能拥有大气层。
若比邻星b绕比邻星的公转半径是地球绕太阳的公转半径的p倍,比邻星b绕比邻星的公转周期是地球绕太阳的公转周期的a倍,则比邻星与太阳的质量的比值为16. 一物体沿直线运动,用x表示运动位移,用t表示运动时间。
从t=0时刻开始计时,物体与r的图象如图所示,图线斜率的绝对值为k,则以下说法正确的是A.物体做匀速直线运动,速度大小等于kB.物体做变减速直线运动,加速度均匀减小C.物体做匀减速直线运动,加速度大小等于kD.物体做匀减速直线运动,加速度大小等于2k17.如图所示,一个理想变压器原线圈的匝数为50匝,副线圈的匝数为I00匝,原线圈两端接在光滑的水平平行导轨上,导轨间距为0.4m。
导轨上垂直于导轨有一长度略大于导轨间距的导体棒,导轨与导体棒的电阻忽略不计,副线圈回路中电阻R1=5Ω,R2=15Ω.图中交流电压表为理想电压表。
导轨所在空间有垂直于导轨平面、磁感应强度大小为1T的匀强磁场。
导体棒在水平外力的作用下运动,其速度随时间变化的关系式为:,则下列说法中正确的是A.R1的功率为0.2 WB.电压表的示数为C.水平外力为恒力D.变压器铁芯中磁通量变化率的最大值为0.04 Wh/s18.如图所示,真空中有一边长为a的等边三角形ABC,P点是三角形的中心。
2018届东北三省四市教研联合体高三高考模拟(二)语文试题(word版)
2018届东北三省四市教研联合体高三高考模拟(二)语文试题(word版)2018年XXX高考模拟考试(二)语文本试卷共22题,共150分,共10页。
考试结束后,请将本试卷和答题卡一并交回。
注意事项:1.答题前,请考生先将自己的姓名、准考证号码填写清楚,并将条形码准确粘贴在条形码区域内。
2.答题时请按要求使用笔。
3.请按照题号顺序在答题卡各题目的答题区域内作答,超出答题区域书写的答案无效;在草稿纸、试题卷上答题无效。
4.作图时,可先使用铅笔画出,确定后必须用黑色字迹的签字笔描黑。
5.请保持卡面清洁,不要折叠,不要弄破、弄皱,不准使用涂改液、修正带、刮纸刀。
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。
武侠小说中的“江湖世界”被视为虚拟的世界,因为它过分夸大了“江湖世界”与“官府世界”各自的独立性,仿佛两者平行并立,互不干涉。
自明清以来,中国的秘密社会名目繁多,晚清以来的武侠小说不少涉及近代中国的秘密社会。
然而,随着文人笔下秘密社会的日益理想化,武侠小说中的江湖世界已经成为完全可与官府世界平分秋色的第二社会。
但在现实生活中,“江湖”虽然远离朝廷,但仍在官府管辖下,侠客也难以“道遥自在”。
像武侠小说中所描写的那样,双方互不干涉内政,在“官府世界”遵守国家王法,在“江湖世界”则听从江湖规则,但这只是小说家的美好愿望。
有趣的是,描写侠客“仗义疏财”、“替天行道”的《水游传》促进了中国秘密社会的形成,而XXX、天地会等民间教门、会党的形成又反过来深刻影响了后世的武侠小说。
这种影响分为虚和实两种。
实际上,它为小说家提供了无数侠客故事;而虚假的影响则促使小说家在原有社会结构之外,另建一个发挥特殊职能的“第二社会”。
后者的意义无疑更为重大,它使得武侠小说中的“江湖世界”不仅不完全是空想,而且有近代中国秘密社会的影子,同时也不完全是现实,仍然保留着甚至着意渲染其作为法外世界的理想主义色彩。
高三数学-01【数学】东北三省四市2018第二次联合考试(
2018年东北三省四市第二次联合考试 即2018年哈尔滨市高考模拟考试(一) (哈尔滨·长春·沈阳·大连教研室联合命题)数学(理工类)本试卷分第I 卷(选择题)和第Ⅱ卷(非选择题)两部分,第I 卷1—3页,第Ⅱ卷4—6页.共 150分,考试时间120分钟.考试结束后,将本试卷和答题卡一并交回. 注意事项:1.答题前,考生将自己的姓名、准考证号码填写清楚,将条形码准确粘贴在条形码区 域内. 2.选择题必须使用2B 铅笔填涂;非选择题必须使用0.5毫米黑色字迹的签字笔书写.字 体工整.笔迹清楚.3.请按照题号顺序在各题目的答题区域内作答,超出答题区域书写的答案无效:在草 稿纸、试题卷上答题无效.4.保持卡面清洁,不要折叠,不要弄破、弄皱、不准使用涂改液、刮纸刀. 参考公式:一般地,假设有两个变量X 和Y ,它们的可能取值分别为12{,}x x 和扫12{,}y y ,其样本频数列联表为随机变量22()()()()()n ad bc K a b c d a c b d -=++++,其中n a b c d =+++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。
只有一项是符合题目要求的) 1.设集合A={1,2},则满足{1,2,3}A B =,的集合B 的个数是(A)1 (B)3 (C)4(D)82.若复数而312a ii++, (a ∈R ,i 为虚数单位)是纯虚数,则实数a 的值为 (A)-2 (B)6 (C)4(D)-63.已知向量,m n 的夹角为6π,且||3m =,||2,n =在∆ABC 中,22,26A B m n A C m n =+=-,D 为BC 边的中点,则||AD =(A )2 (B )4(C )6(D )84.关于函数()sin cos f x x x =+下列命题正确的是(A)函数()f x 最大值为2 (B)函数()f x 的一条对称轴为4x π=(C)函数()f x 的图象向左平移4π个单位后对应的函数是奇函数 (D)函数产|()|y f x =的周期为2π5.已知等差数列{}n a 与等比数列{},n b 满足33324,20a b b b b =-=,则{}n a 前5项的和5S 为 (A )5 (B )20(C )10(D )406.如图给出的是计算1111 (3529)++++的值的一个程序框图,则图中执行框内①处和判断框中的②处应填的语句是 (A)2,15n n i =+= (B)2,15n n i =+> (C)1,15n n i =+= (D)1,15n n i =+>7.在2018年3月15日那天,哈市物价部门对本市的5家商场的某商品的一天销售量及其价格进行调查,5家商场的售价x 元和销售量y 件之间的一组数据如下表所示:由散点图可知,销售量y 与价格*之间有较好的线性相关关系,其线性回归直线方程是;3.2y x a =-+,(参考公式:回归方程;,y bx a a y bx =+=-),则a =(A)-24 (B)35.6 (C)40.5(D)408.两个平面α与β相交但不垂直,直线m 在平面α内,则在平面β内 (A)一定存在直线与m 平行,也一定存在直线与m 垂直 (B)一定存在直线与m 平行,但不一定存在直线与m 垂直 (C)不一定存在直线与m 平行,但一定存在直线与m 垂直 (D)不一定存在直线与m 平行,也不一定存在直线与m 垂直9.已知点(,)P x y 是直线40(0)kx y k ++=>上一动点,PA 、PB 是圆C :2220x y y +-=的两条切线,A 、B 是切点,若四边形PA CB 的最小面积是2,则k 的值为 (A)2(B)212(C)22(D)210.计划在4个体育馆举办排球、篮球、足球3个项目的比赛,每个项目的比赛只能安排在一个体育馆进行,则在同一个体育馆比赛的项目不超过2项的安排方案共有 (A )24种 (B )36种 (C )42种 (D )60种11.已知P 为双曲线22221(0,0)x y a b a b-=>>左支上一点,12,F F 为双曲线的左右焦点,且12215c o s s i n 5P F F P F F ∠=∠=则此双曲线离心率是 (A)5(B)5 (C)25(D)312.已知定义在(0,+∞)上的函数()f x 为单调函数,且1()[()]1f x f f x x+=,则(1)f =(A )1 (B )152+或152- (C )152+ (D )152-第II 卷(非选择题共90分)本卷包括必考题和选考题两部分第13题~第21题为必考题,每个试题学生都必须做答 第22题~第24题为选考题,考生根据要求做答.二、填空题(本题共4个小题。
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数学(理)试题(
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. 设是虚数单位,则复数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,集合,则()A. B. C. D.3. 等比数列中,,,则()A. B. 4 C. D.4. 已知向量,,若,则()A. 0B.C.D.5. 执行如下的程序框图,若输出的值为,则“?”处可填()学.科.网...A. B. C. D.6. 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. 240B. 480C. 720D. 9607. 函数的部分图象大致是()A. B.C. D.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. B. C. D.9. 是双曲线的左右焦点,过且斜率为1的直线与两条渐近线分别交于两点,若,则双曲线的离心率为()A. B. C. D.10. 设是两条不同的直线,是两个不同的平面,则下列命题中正确的是()A. 若,,则B. 若,,则C. 若,,,则D. 若,且,点,直线,则11. 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. 已知当时,关于的方程有唯一实数解,则值所在的范围是()A. B. C. D.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,则_______.14. 已知递增的等差数列的前三项和为,前三项积为10,则前10项和_______.15. 函数在闭区间上的最小值是_______.16. 设抛物线的焦点为,过点的直线与抛物线相交于两点,与抛物线的准线相交于点,,则与的面积之比_______.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. 已知三个内角所对的边分别是,若.(1)求角;(2)若的外接圆半径为2,求周长的最大值.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:,,(1)请画出上表数据的散点图;(2)请根据上表提供的数据,用最小二乘法求出关于的线性回归方程;(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,四棱柱的底面为菱形,,,为中点.(1)求证:平面;(2)若底面,且直线与平面所成线面角的正弦值为,求的长.20. 椭圆:的左、右焦点分别为、,若椭圆过点.(1)求椭圆的方程;(2)若为椭圆的左、右顶点,()为椭圆上一动点,设直线分别交直线:于点,判断线段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,曲线在处的切线经过点.(1)证明:;(2)若当时,,求的取值范围.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. 在直角坐标坐标系中,曲线的参数方程为(为参数),曲线:.以为极点,轴的非负半轴为极轴,与直角坐标系取相同的长度单位,建立极坐标系.(1)求曲线的极坐标方程;(2)射线()与曲线的异于极点的交点为,与曲线的交点为,求.23. 设函数.(1)设的解集为集合,求集合;(2)已知为集合中的最大自然数,且(其中为正实数),设.求证:.。
2018年东北三省四市教研联合体联考高考英语二模试卷
2018年东北三省四市教研联合体联考高考英语二模试卷第二部分阅读理解(共两节)第一节(满分30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.1. Originally owned by the Duke of Buckingham, Buckingham House was bought by King George III for his wife Queen Charlotte in 1761.Although the majority of Buckingham Palace’s 775 rooms remain closed to the public,the organized tours allow visitors’ ac cess to all 19 State Rooms, the Palace Gardens and the Royal Mews usually from late July to late September.From the grand staircase, to the artwork, sculptures and state coaches, the________is packed with remarkable sights.Here’s our pick of the top 3 highlights:1.The staircaseThe grand staircase is one of the first things you’ll see during the tour and it’s also one of the best. Designed by architect John Nash to renew the palace for King George IV back in the early 1800s, it features a gilt﹣bronze(金青铜) balustrade(扶手)decorated with designs of plant’s leaves.2. The audio (音频) tourNo one knows the palace better than the royals themselves, so who better to introducethe audio guide than Prince Charles, who was actually born there? All visitors receive thefree audio guide, available in English, French, German, Spanish, Italian, Brazilian Portuguese, Japanese, Russian and Mandarin.There’s also a family audio guide(available in English only) with an activity trail(轨迹)suitable for children between seven and eleven years old.3. The chandeliers (枝形吊灯)The high ceilings at Buckingham Palace feature some of the most dramatic chandeliers you’ll ever gaze up at.There’s the waterfall chandelier, which hangs from the center of the White Drawing Room, the nine﹣light gilt﹣bronze and glass chandeliers in the Throne Room, the dazzling six crystal(水晶)chandeliers from the ceiling of the Ballroom and the set of four glass and gilt﹣bronze chandeliers in the Blue Drawing Room.(1)What place are accessible for tourists to visit in the Palace?________A.The 775 rooms all year.B.The Royal Mews in June.C.All 19 State Rooms in August.D.The Palace Gardens all year.(2)Who designed the staircase in Buckingham House?________A.John Nash.B.King George III.C.Prince Charles.D.The Duke of Buckingham.(3)Which of the following families is a family audio guide intended for?________A.A Brazilian family who can’t speak English.D.An English speaking family with a one﹣year﹣old girl.(4)Where can tourists see the six crystal chandeliers?________A.In the Ballroom.B.In the Throne Room.C.In the Blue Drawing Room.D.In the White Drawing Room.【答案】CACA【考点】完形综合阅读理解综合【解析】白金汉宫最初由白金汉公爵拥有,在1761被乔治三世国王买给他的妻子Queen Charlotte.尽管白金汉宫的775个房间大部分仍然关闭,从七月下旬到九月下旬,有组织的旅游允许游客进入所有19个国家间(State Rooms),宫殿花园和 the Royal Mews.从大楼梯到艺术品、雕塑,白金汉宫旅游充满了非凡的景观.下面是我们挑选的3大亮点:楼梯、音频巡回演唱会和枝形吊灯.【解答】(1)C.细节理解题.根据第一段的“Although the majority of Buckingham Palace’s 775 rooms remain closed to the public,the organized tours allow visitors’ access to all 19 State Rooms, the Palace Gardens and the Royal Mews usually from late July to late September.”可知在宫殿里游客可以在八月参观所有19个国家间(State Rooms),故选C.选项B的时间in June和选项D的时间all year与文中的from late July to late September不一致.(2)A.细节理解题.根据文中的" Designed by architect John Nash to renew the palace for King George IV back in the early 1800s, it features a gilt﹣bronze(金青铜)balustrade(扶手)decorated wi th designs of plant’s leaves."可知John Nash设计了白金汉住宅的楼梯,故选A.(3)C.细节理解题.根据文中的“There’s also a family audio guide (available in English only) with an activity trail(轨迹)suitable for children between seven and eleven years old.”可知一个有两个9岁男孩的英国家庭最适合家庭音响指南,故选C.(4)A.细节理解题.根据文章的最后一段的" the dazzling six crystal(水晶)chandeliers from the ceiling of the Ballroom "可知游客们能在舞厅天花板上看到六个水晶吊灯,故选A.2. Steve, a twelve﹣year﹣old boy with alcoholic parents, had been failing since first grade in his test.Steve went unnoticed…un til Miss White.In the middle of the seventh grade, Steve still hurried through his tests, and continued to dream of other things.His heart was in the woods, where he often escaped alone, tryingto shut out the sights, sounds and smells of his alcoholic home. No one checked on him to see if he was safe.One day, Miss White’s voice broke into his daydreams.Steve locked his gaze on Miss White with adolescent adoration.“You all did pretty well,” she told the class,“except forAfter that, it was war!! Steve still wouldn’t do his homework. Even as the punishments became more severe, he remained stubborn.“You’re smart enough! You’ll see a change!” Nothing.“Give yourself a chance! Don’ give up on your life!” Nothing.“Steve! Please! I care about you!”Steve went home from school, thoughtful, one afternoon.Both parents were passed out and the house was very messy.He gathered up all things and put them in order.The following Monday he arrived at school on time, and Miss White walked in and immediately gave a quiz on the weekend homework. Miss White took hispaper. Obviously puzzled, she began to look it over. Suddenly, her face broke into a smile. The smartest boy in the seventh grade had just passed his first test!He discovered that not only could he learn, but he was good at it! Steve began to________!(1)Why did Steve’s parents not care about him?________A.They didn’t love him.B.They drank too much.C.Steve often stayed out.D.Steve got too low marks.(2)What happened to Steve in his seventh grade?________A.His home changed a lot.B.He first passed his test.C.He didn’t nothing to change.D.He scored the highest marks.(3)What does the underlined word“excel”mean?________A.quit from the school.B.reflect about his life.C.learn a computer program.D.do much better than others.【答案】BBD【考点】阅读理解综合【解析】本文是一篇记叙文.Steve是个学习落后的学生,每次考试都不及格,他天天沉浸在自己的想象里.直到一天漂亮的女老师Miss White 对他很关注,彻底使他改变了.故事给我们的启示是:人人都需要关注,一句善意的话,一个鼓励的眼神甚至都会改变一个人.【解答】(1)B.细节题.根据文章内容“Steve, a twelve﹣year﹣old boy with alcoholic parents”史提夫,一个十二岁的男孩,他的父母经常酗酒的.可知,他的父母亲经常喝酒就没有关心过史提夫.故选B.(2)B.细节题.根据文章内容, The smartest boy in the seventh grade had just passed his first test!由此可知,史蒂夫在7年级的时候,第一次通过了他的考试.结合选项,he was good at it! Steve began to excel!由此可知,史蒂夫通过努力证明了自己不仅是可以学习的孩子,并且他还可以做的很好.从此以此,史蒂夫开始更加努力的学习,并且成绩慢慢的超越了班级的其它同学.结合选项,故选D.3. The UNICEF(the United Nations International Children’s Emergency Fund) report estimates that around one﹣third of the world’s youth ﹣﹣ most in developing countries ﹣﹣ are not online. For example, in Africa, only 40percent of children are online. In Europe, by contrast, 88 percent are.UNICEF reports that one in three internet users around the world are children. Even though so many children are online, the organization says little is known about the effect of digital technology on child’s well﹣being.More importantly, the report finds that little is being done to protect children from the dangers of the digital world.For example, many children around the world have a digital footprint before they can actually walk and make real footprints. Parents often post photos of their children and share stories about them.And a child’s medical records may be stored in the cloud.As children grow, they may share additional details about themselves or photos and videos of themselves. But making all this personal information public may put a child at risk.Lawrence Chandy, director of Data Research and Policy for UNICEF, explains that these risks include the misuse of children’s private information, access to harmful content and cyber﹣bullying(网络欺凌).Besides, cyber﹣bullying, Lawrence Chandy says children are also at risk from online criminal networks. These criminals target children for some of the worst forms of exploitation and abuse, He sa ys safeguarding children’s privacy on the internet is an issue of major concern.“We really emphasize the importance of putting in place safeguards to prevent children’s personal data from falling in the wrong peoples’ hands and protecting their identi ties. This is an issue which is only going to grow in importance.”Parents, caregivers, teachers and school administrators, businesses and policymakers need to work together to ensure safe access and protect children from the possible harm of a growing digital world.(1)What can we probably know from the UNICEF report?________A.Around two﹣thirds of the world’s youth are often online.B.Digital technology develops faster in developing countries.C.The influence on the health of children online is mentioned.D.The number of youth online is larger than that of adults online.(2)What may be found about some children on the internet?________A.Their passwords.B.Their parents’ footprints.C.Their childhood stories.D.Their academic records.(3)What can we infer from the passage?________A.We don’t do much to safeguard children online.D.Criminals target the parents of children online for money.(4)What is the main idea of the passage?________A.Cyber﹣bullying causes more danger to the youth.B.The digital technology can push the world to develop.C.The digital world is mentally good but physically bad.D.Danger in children’s digital wo rld should cause concern.【答案】ACAD【考点】阅读理解综合【解析】本文是一篇社会文化类阅读,文章主要介绍了联合国儿童基金会(The United Nations International Children’s Emergency Fund)的报告估计,世界上大约三分之一的年轻人(大部分在发展中国家)没有上网.例如,在非洲,只有40%的儿童上网.相比之下,欧洲的这一比例为88%.【解答】(1)A.细节理解题.根据“For example, in Africa, only 40percent of children are online. In Europe, by contrast, 88 percent are.可知我们可能从联合国儿童基金会的报告中知道”世界上大约三分之二的年轻人经常上网.故选A.(2)C.细节理解题.根据“Parents often post photos of their children and share stories about them.And a child’s medical records may be stored in the cloud.”可知在网上可以找到一些孩子的童年故事.故选C.(3)A.推理判断题.根据“We really emphasize the importance of putting in place safeguards to prevent children’s personal data from falling in the wrong peoples’ hands and protecting their identities”可知我们在保护儿童上网方面做得不多.故选A.(4)D.推理判断题.根据“Parents, caregivers, teachers and school administrators,businesses and policymakers need to work together to ensure safe access and protect children from the possible harm of a growing digital world.”可知儿童数字世界中的危险应该引起关注.故选D.4. If you don’t want your damp bathroom to be perfect for microorganisms(微生物), you can just open the window and let some fresh air in.Not so easy on a space station though, as astro﹣biologist Petra Schwendner of the University of Edinburgh explains.It has been seen on the international space station that these microorganisms can accumulate.I’ve seen pictures where you could see this corrosion(腐蚀) caused by bacteria or basically an accumulation of fungus(真菌)behind wet towels.So as we set our sights on Mars, what might grow in the spacecraft dish during the yearand a﹣half﹣long flight? The Mars 500 habitat in Moscow simulated(模拟) thattrip, with six crew members inside.And Schwendner and her team tested microorganism samples of the habitat over time.They found what you might expect: a lot of human﹣related bacteria and fungi(真菌), mostly at levels considered safe life in space. But theyhostile(敌意的)bacteria.The study says that seeing this decrease basically is for us an important point or proof that continuous monitoring is an important fact and is really required to basically maintain or be able to maintain a healthy environment.When we do rocket to the Red Planet, it’ll be impossible to keep our spacecraft completely clean without bacteria.Because humans are leaky animals.The real question might be how we’ll ke ep our many microorganisms from starting to live in Mars.(1)What will a space station be like?________A.A perfect place for microorganism to live in.B.Its window can be opened to let fresh air in.C.A perfect place for microorganisms to decline.D.Its spacecraft can get affected badly by bacteria.(2)What is the author’s attitude towards the finding?________A.Doubtful.B.Disapproving.C.Subjective.D.Cautious.(3)Why are three fewer different types of microorganisms in space?________A.Spacem en don’t want to keep large numbers of them alive.B.More powerful microorganism eventually replace others.C.Unhealthy microorganisms disappear during rocketing.D.Some can’t survive the damp air in the space station.(4)What can be inferred according to the passage?________A.It’s difficult to stop microorganisms’ existence on Mars.B.Our spacecraft failed to monitor the decrease of microorganism.C.Keeping our environment healthy is a basic task for our spacecraft.D.Our spacecraft should be required not to carry microorganisms on Mars.【答案】ADBA【考点】阅读理解综合完形综合【解析】本文属于说明文阅读,作者通过这篇文章主要向我们描述了研究发现空间站是微生物生存的理想场所,因此对待将微生物带上火星一定要谨慎.【解答】(1)A.细节理解题.根据文章I’ve seen pictures where you could see this corrosion(腐蚀) caused by bacteria or basically an accumulation of fungus(真菌)behind wet towels可知空间站是微生物生存的理想场所;故选A.(2)D.推理判断题.根据文章The real question might be how we’ll keep our many microorganisms from starting to live in Mars可知作者对这一发现的态度是谨慎的;故选over time which could indicate a less﹣than﹣healthy microorganism community that’s potentially more likely to be taken over by hostile(敌意的)bacteria可知在太空中微生物的种类减少了因为更强大的微生物最终取代其他微生物;故选B.(4)A.推理判断题.根据文章When we do rocket to the Red Planet,it’ll be impossible to keep our spacecraft completely clean without bacteria.Because humans are leaky animals可知根据文章可以推断很难阻止微生物在火星上的存在;故选A.第二节(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.选项中有两项为多余选项.Your probably start this new academic year with a resolution to study harder.(1)_______Recent discoveries in brain research point to better ways to learn.How does the brain save new information? Think of the last time you looked up a number in the telephone book and dialed it.(2)_______Probably not! That’s because it’s in your short﹣term memory.(3)_______That’s where you keep the phone number while you dial it.But if you can put the phone number into long﹣term memory,you’ll remember that same phone number next week.When you study, you transfer new information into long﹣term memory.Every time we learn something new,we build new connections to information that we already know.When there are more connections to the new information,it’s easier to find it again.(4)_______● Make an effort.The brain remembers better when we are interested in the subject or know we will need the information in the future.● Find the most important information.your brain can process only a limited amount of information at one time,so don’t try to remember every detail.● Make the new brain connections stronger.One technique is to recite the ideas out loud in your own words.(5)_______By understanding how the brain works,and following these tips,you can make this your most successful academic year ever.A.These memories last just a few seconds.B.Now, science can help you keep your resolution.C.It works like a “holding area” for new information.D.Could you remember that number five minutes later?E.Saying new information out loud is a good way to remember it.F.Brain researchers have discovered three points for effective study.G.Another method is to activate the visual part of the brain by drawing.【答案】B,D,C,F,G【考点】七选五阅读【解析】本文属于说明文,讲述的是如何更好地学习,更好地记住课堂上所学到的内容,并归纳了三种方法.【解答】with a resolution to study harder你可能会在新学年开始,决心更加努力学习,这与B.Now, science can help you keep your resolution现在,科学可以帮助你保持决心,意思相符,故答案为B.(2)D.考查上下文推理能力.根据下文Probably not! That’s because it’s in y our short﹣term memory大概不会吧!那是因为它在你的短期记忆中,这与D.Could you remember that number five minutes later?五分钟后你能记得那个号码吗?意思相符,故答案为D.(3)C.考查上下文推理能力.根据下文That’s where you keep the phone number while you dial it这就是你拨打电话时记住电话号码的地方,这与C.It works like a “holding area” for ne w information它像一个新信息的“保持区”,意思相符,故答案为C.(4)F.考查上下文推理能力.根据下文● Make an effort,● Find the most important information,● Make the new brain connections stronger可知这是有效学习的三个方法,这与F.Brain researchers have discovered three points for effective study脑研究人员已经发现了有效学习的三点,意思相符,故答案为F.(5)G.考查上下文推理能力.根据前文One technique is to recite the ideas out loud in your own words一种技巧是用自己的话大声朗读这些想法,这与G.Another method isto activate the visual part of the brain by drawing一种方法是通过绘画激活大脑的视觉部分,意思相符,故答案为G.第三部分英语知识运用(共两节)第一节完形填空(每小题1.5分,满分30分)阅读下面短文,从短文后各题所给的四个选项A、B、C和D中,选出可以填入空白处的最佳选项.Lemons are considered bitter and lemonade(柠檬汁) sweet but what does the following saying “When life gives you lemons, make lemonade.”mean? It means having an “I can do it”(1)_______and making the(2)_______out of a bad situation.(3)_______, when something bad happens, it’s not uncommon for most people to(4)_______it, talk about it to who’ll listen, and bemoan(哀叹)life, "Why(5)_______? " That’s like getting a bag of lemons,(6)_______them down, and thinking, “This sucks! I’d rather have chocolate!” If you don’t make anything with the lemons, they will(7)_______finally. But what if you did something with them? What if you made(8)_______? Isn’t it possible to do something similar with a bad sit uation? Here’s an example.Let’s say you’re about to go to the movies, but you(9)_______you have a flat tire(瘪胎).You consider this a(an)(10)_______thing; after all, you are really looking forward to spending some time with Ryan Gosling and Emma Stone. N ow you’re all(11)_______, cursing(诅咒)the tire, the car, and your life.(12)_______what if you just stopped cursing, or have some coffee with a friend(13)_______.A terrible experience can be turned into something (14)_______. Almost anything can work(15)_______out into something better.You can’t(16)_______what hashappened, right? But you can make lemons into lemonade.I’m not suggesting it will be(17)_______. The easy thing to do is curse your hard(18)_______.Next time some unhappy thing happens, stop and think, "How can I(19)_______? "If you take that event and turn it into a meaningful experiences, you will see the (20)_______at last.A.attitudeB.recipeC.accessD.skill(2)A.worstB.fullestC.bestD.sweetest(3)A.UnexpectedlyB.UnfortunatelyC.ExcitedlyD.Frankly(4)A.rely onB.take onC.focus onD.cheer on(5)A.lemonsB.youC.the lifeD.me(6)A.settingB.settlingC.shuttingD.swallowing(7)A.become bitterB.turn yellowC.taste sweetD.go spoiled(8)A.chocolateB.lemonadeC.differencesD.efforts(9)A.thinkB.hateC.discoverD.recognize(10)A.challengingB.terribleC.embarrassingD.alternative(11)A.stressed outB.hurried upC.paid offD.shut out(12)A.ButB.AsC.SoD.Though(13)A.togetherB.thoughC.alongD.instead(14)A.personalB.funnyC.positiveD.secure(15)A.itB.itselfC.themD.themselvesA.changeB.noteC.predictD.curse(17)A.greatB.toughC.easyD.fine(18)A.struggleB.workC.choiceD.situation(19)A.turn upB.turn aroundC.turn downD.turn out(20)A.truthB.misfortuneC.chaosD.advantages【答案】ACBCDADBCBAADCBACDBD【考点】完形综合【解析】本文属于一篇议论文,文章通过对不幸的认识的转变可以把不幸的事情它变成积极的体验,因此要学会用积极的态度看待问题,一切会变得不同.【解答】(1) A.考查名词及语境理解.根据下文If you take that event and turn it into a meaningful experiences,you will see the(20)at last可知这是一种“我能行”的态度,故答案为A.(2)C.考查形容词及语境理解.根据下文If you take that event and turn it into a meaningful experiences可知此处是指充分利用好糟糕的情况,make the best out of意为C. Excitedly 激动地;D. Frankly坦白地;根据下文when something bad happens,it’s not uncommon for most people to(4)it,talk about it to who’ll listen, and bemoan(哀叹)life可知不幸的是,遇到糟糕的情况时,人们往往会抱怨命运的不公,故答案为B.(4) C.考查动词短语及语境理解.根据下文talk about it to who’ll listen, and bemoan(哀叹)life可知人们此时会专注于那些不幸的事情,故答案为C.(5)D.考查名词及语境理解.根据前文talk about it to who’ll listen, and bemoan(哀叹)life可知他们会抱怨为什么是自己遇到这样的事情,故答案为D.(6) A.考查动词及语境理解.根据That’s like getting a bag of lemons,(6)them down,and thinking可知这就像他们得到一袋柠檬,然后放下,开始思考,故答案为A.(7) D.考查动词及语境理解.根据前文If you don’t make anything with the lemons可知如果不加处理,柠檬最后会坏掉,故答案为D.(8)B.考查名词及语境理解.根据前文When life gives you lemons, make lemonade可知此处是指柠檬做成柠檬汁怎么样,故答案为B.(9) C.考查动词及语境理解.根据but you(9)you have a flat tire可知结果发现汽车轮胎没气了,故答案为C.(10)B.考查形容词及语境理解.根据下文after all, you are really looking forward to spending some time with Ryan Gosling and Emma Stone可知你会认为这是一个糟糕的事情,故答案为B.(11) A.考查动词及语境理解.A. stressed out压力极大; B. hurried up 匆忙;C. paid off 得到回报;D. shut out 关闭;根据下文cursing(诅咒)the tire, the car,and your life可知你会承受着极大的压力,故答案为A.(12) A.考查连词及语境理解.根据下文what if you just stopped cursing可知但是你如果停止诅咒会是什么样呢,故答案为A.(13) D.考查副词及语境理解.根据or have some coffee with a friend(13)可知而是和朋友喝杯咖啡怎么样,故答案为D.(14) C.考查形容词及语境理解.根据A terrible experience can be turned into something 可知糟糕的经历可能会变成积极的事情,故答案为C.(15) B.考查代词及语境理解.根据Almost anything can work(15)out into something better可知几乎任何事情都能自然而然变成更好的东西,故答案为B.(16) A.考查动词及语境理解.根据下文But you can make lemons into lemonade可知你是不可能改变已经发生的事情的,故答案为A.(17) C.考查形容词及语境理解.根据下文The easy thing to do is curse your hard可知作者并不是说这是多么容易,故答案为C.(18) D.考查名词及语境理解.根据下文The easy thing to do is curse your hard(18)可知诅咒糟糕的情况是容易的,故答案为D.(19)B.考查动词及语境理解.A.turn up出现;B.turn around转身,变得不同;C. turn down 拒绝;D. turn out结果是;根据下文"If you take that event and turn itinto a meaningful experiences可知此处是如何变得不同,故答案为B.(20) D.考查名词及语境理解.根据If you take that event and turn it into a meaningful experiences,you will see the(20)at last可知如果你把这个事件变成一个有意义的体验,你最后会看到好处的,故答案为D.第二节(每小题1.5分,满分15分)阅读下面材料,在空白处填入适当的内容或括号内单词的正确形式.When your children(1)________(suppose) to be doing homework, are they chatting with friends on Facebook or(2)________(play) games ? Many studies haveshowed that multi﹣tasking(多任务)doesn’t work,even though your child is probably proudly claiming they can do ten things at once! Many people believe that they can perform two or more tasks at the same time,(3)________Dr.Edward says this is impossible.The(4)________(real) is that multi﹣tasking results(5)________poor job performance.New hand held(6)________(equip),such as smart﹣phones,games and social networking sites makes(7)________very easy to muti﹣task and share attention leading to difficulty focusing on the task at hand,such as listening in the classroom or doing homework. But the brain rewards kids for multi﹣tasking even though your child’s performance on every task gets much(8)________(bad).Kid don’t know that(9)________(they) academic performances are not good because they feel better when they multi﹣task. Multi﹣tasking prevents people from gaining(10)________deep understanding of the information they are trying to learn.in the long run,the shifting of attention affects grades.【答案】are supposed,playing,but,reality,in,equipment,it,worse,their,a【考点】说明文语法填空【解析】本文主要讲述了在孩子们的教育过程中,许多研究表明多任务化是行不通的.【解答】1. are supposed.考查固定搭配.be supposed to do sth为习语,表示“应该(理应)做某事”.2. playing.考查动词时态.and是并列连词,它前后连接两个相同的语法成分,chatting和playing是并列谓语,都用现在进行时态.3. but.考查连词.前后两个分句之间是转折关系,用连词but.4. reality.考查名词.句中缺少主语,用名词作主语,reality是不可数名词.5. in.考查固定搭配.result in意为“引起,导致”,是固定搭配.6. equipment.考查名词.hold是及物动词,后名词作宾语,equipment是不可数名词.7. it.考查it用法.it是形式宾语,真正的宾语是to muti﹣task and share attention leading to difficulty focusing on the task at hand.8. worse.考查形容词比较级.指单任务和多任务相比较,用形容词比较级.9. their.考查代词.their指代文中提到的kids.10. a.考查冠词.gain a understanding of意为“对…了解”.第四部分写作(共两节)第一节短文改错(满分10分)假定英语课上老师要求同桌之间交换修改作文,请你修改你同桌写的以下作文.文中共有10处语言错误,每句中最多有两处.错误涉及一个单词的增加、删除或修改.增加:在缺词处加一个漏字符号(∧),并在其下面写出该加的词.删除:把多余的词用斜线(\)划掉.修改:在错的词下划一横线,并在该词下面写出修改后的词.注意:1.每处错误及其修改仅限一词.2.只允许修改10处,多者(从第11处起)不计分.I am a student from Xinhua Middle school,who is responsible of arranging the schedule,I am so honoring to welcome you to my city and now let me introduce following details.In the morning, there will be a meeting with the students delegates from my school,which topics are about the school life,cultural differences and son on.And it wasexpected that we’ll know each other much better by communicating in this way.The tasty Chinese foods included dumplings and noodles will be prepared for lunch.After that,a city tour will be taken on.As a fair attractive city,I believe it will leave you a good impression.If you have any doubt,please communicate with me soon.Wish you an unforgettable experience there!【答案】I am a student from Xinhua Middle school,who is responsible of arranging the schedule,I am so honoring to welcome you to my city and now let me introduce∧ following details.In the morning, there will be a meeting with the students delegates from my school,which topics are about the school life,cultural differences and son on.And it was expected that we’ll know each other much better by communicating in this way.The tasty Chinese foods included dumplings and noodles will be prepared for lunch.After that,a city tour will be taken on.As a fair attractive city,I believe it will leave you a good impression.If you have any doubt,please communicate with me soon.Wish you an unforgettable experience there!1. of改为for,考查固定搭配be responsible for对…负责.2. honoring改为honored,考查形容词,表示“荣幸的”用形容词honored作表语.3. introduce后面加the,考查冠词,特指用定冠词,此处特指下面的.4. students改为student,考查名词,作定语用名词单数.5. which改为whose,考查定语从句,先行词为students delegates,在定语从句中作定语,所以用whose引导.6. was改为is,考查时态,本文是现在时态,所以用一般现在时态.7. included改为including,考查介词,后跟宾语用介词including.8.去掉on,考查固定搭配,take a tour观光,不用on.9. fair改为fairly,考查副词,修饰形容词用副词.10. there改为here,考查句意,表示“希望你在这儿有一个难忘的经历”,所以用here.【考点】记叙文短文改错【解析】本文是一篇欢迎词:我是新华中学的一名学生,负责安排行程,现在让我介绍以下活动的细节.【解答】I am a student from Xinhua Middle school,who is responsible of arranging the schedule,I am so honoring to welcome you to my city and now let me introduce∧ following details.In the morning, there will be a meeting with the students delegates from my school,which topics are about the school life,cultural differences and son on.And it was expected that we’ll know each other much better by communicating in this way.The tasty Chinese foods included dumplings and noodles will be prepared for lunch.After that,a city tour will be taken on.As a fair attractive city,I believe it will leave you a good impression.If you have any doubt,please communicate with me soon.Wish you an unforgettable experience there!1. of改为for,考查固定搭配be responsible for对…负责.2. honoring改为honored,考查形容词,表示“荣幸的”用形容词honored作表语.3. introduce后面加the,考查冠词,特指用定冠词,此处特指下面的.4. students改为student,考查名词,作定语用名词单数.5. which改为whose,考查定语从句,先行词为students delegates,在定语从句中作定语,所以用whose引导.6. was改为is,考查时态,本文是现在时态,所以用一般现在时态.7. included改为including,考查介词,后跟宾语用介词including.8.去掉on,考查固定搭配,take a tour观光,不用on.9. fair改为fairly,考查副词,修饰形容词用副词.10. there改为here,考查句意,表示“希望你在这儿有一个难忘的经历”,所以用here.第二节书面表达(25分)假定你是李华,在教师节到来之际,想邀请外教Henry参加你们班以“Thank our teacher for…”为主题的班会,请给他写封邮件.内容包括:1.班会时间、地点2.班会内容注意:1.词数100左右;2.可以适当增加细节,以使行文连贯.________________________________________________【答案】Dear Henry,,I’m writing to invite you to attend our class meeting next week if you are available.,As Teachers’ Day is approaching. Chinese students always like to express gratitude to their teachers as tradition.The topic of the meeting is “Thank our teachers for…” ,scheduled at 3:00 p.m. next Monday in my classroom.To celebrate the significant festival, we have prepared some activities including presenting our gifts to our respectable teachers, singing or dancing and designing a project about how to thank teachers.,Our English levels have improved a lot with your help so we hope to show our thanks to you personally on that day.Looking forward to your prompt reply.,Yours,LiHua 【考点】提纲类【解析】本文属于提纲作文,动笔前,一定要认真分析要点,理解要点要表达的含义,不能遗漏要点,跑题偏题.平时除了加强词汇积累,写作联系以外,还可以适当记忆一些类似的范文,这样在考试中可以起到事半功倍的效果.高分句型一:The topic of the meeting is “Thank our teachers for…” ,scheduled at 3:00 p.m. next Monday in my classroom.会议的主题是“感谢我们的老师……”,安排在下星期一下午3点在我的教室里.本句中scheduled是过去分词在句中做状语.高分句型二:To celebrate the significant festival, we have prepared some activities including presenting our gifts to our respectable teachers, singing or dancing and designing a project about how to thank teachers.为了庆祝这个重要的节日,我们准备了一些活动,包括给我们尊敬的老师赠送礼物,唱歌跳舞,设计一个关于如何感谢老师的项目.本句是一个简单句,to celebrate the significant festival在句中做目的状语.句子是we。
(全优试卷)东北三省四市教研联合体高三第二次模拟考试数学(理)试题Word版含答案
东北三省四市教研联合体2018届高三第二次模拟考试理科数学第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.)A.(-1,0) B.(0,1) C.(-1,3) D.(1,3)2.)A.1 B.0 C.-13.中国有个名句“运筹帷幄之中,决胜千里之外.”其中的“筹”取意是指《孙子算经》中记载的算筹.古代是用算筹来进行计算.算筹是将几寸长的小竹棍摆在下面上进行运算.算筹的摆放形式有纵横两种形式(如下图所示).表示一个多位数时,像阿拉伯计数一样,把各个数位的数码从左到右排列.但各位数码的筹式要纵横相间,个位,百位,万位数用纵式表示,十位,千位,十万位数用横式表示.以此类推.例如32668771用算筹可表示为()中国古代的算筹数码A4.)A 6 B8 D85.)A.B. C. D.6.某几何体的三视图如图所示,其俯视图为等边三角形,则该几何体的体积(单)A7.6本不同的书在书架上摆成一排,要求甲、乙两本书必须摆在两端,丙、丁两本书必须相邻,则不同的摆放方法有()种A.24 B.36 C.48 D.60的面积最大值是()A.1 B.49.已知边长为2)A10.)A B C D11..3,则该双曲线的离心率为()ABCD12.)条切线A.0 B.1 C.2 D.3第Ⅱ卷(共90分)二、填空题(每题5分,满分20分,将答案填在答题纸上)13.的最大值为.14.为了了解居民天气转冷时期电量使用情况,某调查人员由下表统计数据计算出回归直线方,现表中一个数据为污损,则被污损的数据为.(最后结果精确到整数位)15.为.16.已知腰长为2的最小值是.三、解答题(本大题共6小题,共70分.解答应写出文字说明、证明过程或演算步骤.)17.(I(II18.树立和践行“绿水青山就是金山银山,坚持人与自然和谐共生”的理念越来越深入人心,已形成了全民自觉参与,造福百姓的良性循环.据此,某网站退出了关于生态文明建设进展情况的调查,调查数据表明,环境治理和保护问题仍是百姓最为关心的热点,参与调查者中200人,并将这200人按年龄分组:第12345(1)求这200人年龄的样本平均数(同一组数据用该区间的中点值作代表)和中位数(精确到小数点后一位);(2)现在要从年龄较小的第1,2组中用分层抽样的方法抽取5人,再从这5人中随机抽取3人进行问卷调查,求这2组恰好抽到2人的概率;(3)若从所有参与调查的人(人数很多)中任意选出3人,设其中关注环境治理和保护问题19.(1(220.(1(2)21..(I(II,请考生在22、23两题中任选一题作答,如果多做,则按所做的第一题记分.22.选修4-4:坐标系与参数方程.(I(II23.选修4-5:不等式选讲(I(II数学(理科)试题参考答案一、选择题、12二、填空题三、解答题17.解:(1(218.解:(1(2)第1,2组抽取的人数分别为2人,3人.设第2组中恰好抽取2(3)从所有参与调查的人中任意选出10,1,2,3,19.解:(1(2)12||||n n =⋅PDC20.解:(1(2单调递增,6.21.解:(1(222.解:(1(223.解:(1(2。
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东北三省四市教研联合体2018届高三第二次模拟考试理科数学第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.设集合{}(){}03,1 -==x x x B x x A ,则B A ( ) A .(-1,0) B .(0,1) C .(-1,3) D .(1,3)2.若复数aiiz ++=11为纯虚数,则实数a 的值为( ) A .1 B .0 C .21- D .-13.中国有个名句“运筹帷幄之中,决胜千里之外.”其中的“筹”取意是指《孙子算经》中记载的算筹.古代是用算筹来进行计算.算筹是将几寸长的小竹棍摆在下面上进行运算.算筹的摆放形式有纵横两种形式(如下图所示).表示一个多位数时,像阿拉伯计数一样,把各个数位的数码从左到右排列.但各位数码的筹式要纵横相间,个位,百位,万位数用纵式表示,十位,千位,十万位数用横式表示.以此类推.例如3266用箅筇表示就是,则8771用算筹可表示为( )中国古代的算筹数码 A .B .C .D .4.右图所示的程序框图是为了求出满足2822n n-的最小偶数n ,那么在空白框内填入及最后输出的n 值分别是( )A .1+=n n 和6B .2+=n n 和6 C.1+=n n 和8 D .2+=n n 和8 5.函数xxx x f tan 1)(2++=的部分图像大致为( )A .B .C. D .6.某几何体的三视图如图所示(单位:cm ),其俯视图为等边三角形,则该几何体的体积(单位:3cm )是( )A .34B .3310 C.32 D .3387.6本不同的书在书架上摆成一排,要求甲、乙两本书必须摆在两端,丙、丁两本书必须相邻,则不同的摆放方法有( )种A .24B .36 C.48 D .608.ABC ∆的内角C B A ,,的对边分别为c b a ,,,若ABC b A c C a B b ∆=+=,2,cos cos cos 2的面积最大值是( )A .1B .3 C.2 D .49.已知边长为2的等边三角形ABC ,D 为BC 的中点,以AD 为折痕,将ABC ∆折成直二面角C AD B --,则过D C B A ,,,四点的球的表面积为( )A .π3B .π4 C.π5 D .π6 10.将函数⎪⎭⎫⎝⎛+=32sin )(πx x f 的图像向右平移a 个单位得到函数()cos(2)4g x x π=+的图象,则a 的值可以为( ) A .512πB .712π C .924π1 D .4124π11..已知焦点在x 轴上的双曲线222211x y m m -=-的左右两个焦点分别为1F 和2F ,其右支上存在一点P 满足12PF PF ⊥,且12PF F ∆的面积为3,则该双曲线的离心率为( )ABC .2D .312.若直线10kx y k --+=(k R ∈)和曲线:E 3253y ax bx =++(0ab ≠)的图象交于11(,)A x y ,22(,)B x y ,33(,)C x y (123x x x <<)三点时,曲线E 在点A ,点C 处的切线总是平行,则过点(,)b a 可作曲线E 的( )条切线 A .0B .1C .2D .3第Ⅱ卷(共90分)二、填空题(每题5分,满分20分,将答案填在答题纸上)13.设实数x ,y 满足约束条件0,40,5,y x y x y ≥⎧⎪-≥⎨⎪+≤⎩则25z x y =++的最大值为 .14.为了了解居民天气转冷时期电量使用情况,某调查人员由下表统计数据计算出回归直线方程为2.1161.13y x =-+,现表中一个数据为污损,则被污损的数据为 .(最后结果精确到整数位)15.已知函数()f x 满足1()(1)1()f x f x f x ++=-,当(1)2f =时,(2018)(2019)f f +的值为 .16.已知腰长为2的等腰直角ABC ∆中,M 为斜边AB 的中点,点P 为该平面内一动点,若||2PC =,则()()PA PB PC PM ⋅⋅⋅的最小值是 .三、解答题 (本大题共6小题,共70分.解答应写出文字说明、证明过程或演算步骤.)17.设数列{}n a 的前n 项和为n S ,且21n S n n =-+,正项等比数列{}n b 的前n 项和为n T ,且22b a =,45b a =.(I )求{}n a 和{}n b 的通项公式;(II )数列{}n c 中,11c a =,且1n n n c c T +=-,求{}n c 的通项n c .18.树立和践行“绿水青山就是金山银山,坚持人与自然和谐共生”的理念越来越深入人心,已形成了全民自觉参与,造福百姓的良性循环.据此,某网站退出了关于生态文明建设进展情况的调查,调查数据表明,环境治理和保护问题仍是百姓最为关心的热点,参与调查者中关注此问题的约占80%.现从参与关注生态文明建设的人群中随机选出200人,并将这200人按年龄分组:第1组[15,25),第2组[25,35),第3组[35,45),第4组[45,55),第5组[55,65),得到的频率分布直方图如图所示.(1)求这200人年龄的样本平均数(同一组数据用该区间的中点值作代表)和中位数(精确到小数点后一位);(2)现在要从年龄较小的第1,2组中用分层抽样的方法抽取5人,再从这5人中随机抽取3人进行问卷调查,求这2组恰好抽到2人的概率;(3)若从所有参与调查的人(人数很多)中任意选出3人,设其中关注环境治理和保护问题的人数为随机变量X ,求X 的分布列与数学期望.19.在如图所示的几何体中,四边形ABCD 是正方形,PA ⊥平面ABCD ,E ,F 分别是线段AD ,PB 的中点,1PA AB ==.(1)证明://EF 平面DCP ;(2)求平面EFC 与平面PDC 所成锐二面角的余弦值.20.在平面直角坐标系中,椭圆C :22221(0)x y a b a b+=>>的离心率为12,点3(1,)2M 在椭圆C 上.(1)求椭圆C 的方程;(2)已知(2,0)P -与(2,0)Q 为平面内的两个定点,过(1,0)点的直线l 与椭圆C 交于A ,B 两点,求四边形APBQ 面积的最大值.21.已知函数2()45x af x x x e=-+-(a R ∈). (I )若()f x 为在R 上的单调递增函数,求实数a 的取值范围;(II )设()()x g x e f x =,当1m ≥时,若12()()2()g x g x g m +=(其中1x m <,2x m >),求证:122x x m +<.请考生在22、23两题中任选一题作答,如果多做,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系xOy 中,以坐标原点为极点,x 轴正半轴为极轴建立极坐标系,曲线1C :cos 3ρθ=,曲线2C :4cos ρθ=(02πθ≤<).(I )求1C 与2C 交点的极坐标;(II )设点Q 在2C 上,23OQ QP =,求动点P 的极坐标方程. 23.选修4-5:不等式选讲已知函数()|2||23|f x x x m =+++,m R ∈. (I )当2m =-时,求不等式()3f x ≤的解集; (II )对于(,0)x ∀∈-∞都有2()f x x x≥+恒成立,求实数m 的取值范围.数学(理科)试题参考答案一、选择题1-5:CDCDD 6-10:BABCC 11、12:BC二、填空题13.14 14.38 15.72-16.22432- 三、解答题17.解:(1)∵21n S n n =-+,∴令1n =,11a =,12(1)n n n a S S n -=-=-,(2)n ≥,经检验11a =不能与n a (2n ≥)时合并,∴1,1,2(1), 2.n n a n n =⎧=⎨-≥⎩又∵数列{}n b 为等比数列,222b a ==,458b a ==, ∴2424b q b ==,∴2q =, ∴11b =,∴12n n b -=.(2)122112nn n T -==--, ∵12121c c -=-,23221c c -=-,…,1121n n n c c ---=-,以上各式相加得112(12)(1)12n n c c n ---=---, 111c a ==,∴121n n c n -=--, ∴21n n c =-.18.解:(1)由10(0.0100.0150.0300.010)1a ⨯++++=,得0.035a =, 平均数为200.1300.15400.35500.3600.141.5⨯+⨯+⨯+⨯+⨯=岁;设中位数为x ,则100.010100.015(35)0.0350.5x ⨯+⨯+-⨯=,∴42.1x ≈岁.(2)第1,2组抽取的人数分别为2人,3人. 设第2组中恰好抽取2人的事件为A ,则1223353()5C C P A C ==. (3)从所有参与调查的人中任意选出1人,关注环境治理和保护问题的概率为45P =, X 的所有可能取值为0,1,2,3,∴03341(0)(1)5125P X C ==-=,11234412(1)()(1)55125P X C ==-=,2234448(2)()(1)55125P X C ==-=,333464(3)()5125P X C ===,所以X 的分布列为:∵4~(3,)5X B , ∴412()355E X =⨯=. 19.解:(1)取PC 中点M ,连接DM ,MF ,∵M ,F 分别是PC ,PB 中点,∴//MF CB ,12MF CB =, ∵E 为DA 中点,ABCD 为矩形,∴//DE CB ,12DE CB =,∴//MF DE ,MF DE =,∴四边形DEFM 为平行四边形, ∴//EF DM ,∵EF ⊄平面PDC ,DM ⊂平面PDC , ∴//EF 平面PDC .(2)∵PA ⊥平面ABC ,且四边形ABCD 是正方形,∴AD ,AB ,AP 两两垂直,以A 为原点,AP ,AB ,AD 所在直线为x ,y ,z 轴,建立空间直角坐标系A xyz -,则(1,0,0)P ,(0,0,1)D ,(0,1,1)C ,1(0,0,)2E ,11(,,0)22F ,设平面EFC 法向量1(,,)n x y z =,111(,,)222EF =-,11(,,1)22FC =-,则110,0,EF n FC n ⎧⋅=⎪⎨⋅=⎪⎩即0,110,22x y z x y z +-=⎧⎪⎨-++=⎪⎩取1(3,1,2)n =-,设平面PDC 法向量为2(,,)n x y z =,(1,0,1)PD =-,(1,1,1)PC =-,则220,0,PD n PC n ⎧⋅=⎪⎨⋅=⎪⎩即0,0,x z x y z -+=⎧⎨-++=⎩取2(1,0,1)n =,121212cos ,||||n n n n n n ⋅<>===⋅ 所以平面EFC 与平面PDC 20.解:(1)∵12c a =,∴2a c =, 椭圆的方程为2222143x y c c+=,将3(1,)2代入得22191412c c+=,∴21c =, ∴椭圆的方程为22143x y +=. (2)设l 的方程为1x my =+,联立221,431,x y x my ⎧+=⎪⎨⎪=+⎩消去x ,得22(34)690m y my ++-=, 设点11(,)A x y ,22(,)B xy , 有122634m y y m -+=+,122934y y m -=+,有2212(1)||34m AB m +==+, 点P (2,0)-到直线l点(2,0)Q 到直线l ,从而四边形APBQ 的面积22112(1)234m S m +=⨯=+(或121||||2S PQ y y =-) 令t =,1t ≥,有22431t S t =+2413t t=+,设函数1()3f t t t =+,21'()30f t t =->,所以()f t 在[1,)+∞上单调递增, 有134t t +≥,故2242461313t S t t t==≤++,所以当1t =,即0m =时,四边形APBQ 面积的最大值为6. 21.解:(1)∵()f x 的定义域为x R ∈且单调递增, ∴在x R ∈上,'()240xaf x x e =-+≥恒成立, 即:(42)xa x e ≥-,所以设()(42)xh x x e =-,x R ∈, ∴'()(22)xh x x e =-,∴当(,1)x ∈-∞时,'()0h x >,∴()h x 在(,1)x ∈-∞上为增函数, ∴当[1,)x ∈+∞时,'()0h x ≤,∴()h x 在[1,)x ∈+∞上为减函数,∴max ()(1)2h x h e ==,∵max(42)x a x e ⎡⎤≥-⎣⎦,∴2a e ≥,即[2,)a e ∈+∞.(2)∵2()()(45)xxg x e f x x x e a ==-+-, ∵12()()2()g x g x g m +=,[1,)m ∈+∞,∴122221122(45)(45)2(45)2x x m x x e a x x e a m m e a -+-+-+-=-+-, ∴122221122(45)(45)2(45)x x m x x e x x e m m e -++-+=-+, ∴设2()(45)x x x x e ϕ=-+,x R ∈,则12()()2()x x m ϕϕϕ+=, ∴2'()(1)0x x x e ϕ=-≥,∴()x ϕ在x R ∈上递增, ∴设()()()F x m x m x ϕϕ=++-,(0,)x ∈+∞, ∴22'()(1)(1)m xm x F x m x e m x e +-=+----,∵0x >,∴0m x m x e e +->>,22(1)(1)(22)20m x m x m x +----=-≥, ∴'()0F x ≥,()F x 在(0,)x ∈+∞上递增,∴()(0)2()F x F m ϕ>=,∴()()2()m x m x m ϕϕϕ++->,(0,)x ∈+∞,令1x m x =-,∴11()()2()m m x m m x m ϕϕϕ+-+-+>,即11(2)()2()m x x m ϕϕϕ-+>, 又∵12()()2()x x m ϕϕϕ+=,∴12(2)2()()2()m x m x m ϕϕϕϕ-+->,即12(2)()m x x ϕϕ->, ∵()x ϕ在x R ∈上递增,∴122m x x ->,即122x x m +<得证.22.解:(1)联立cos 3,4cos ,ρθρθ=⎧⎨=⎩cos θ=, ∵02πθ≤<,6πθ=,ρ=∴所求交点的极坐标)6π.(2)设(,)P ρθ,00(,)Q ρθ且004cos ρθ=,0[0,)2πθ∈, 由已知23OQ QP =,得002,5,ρρθθ⎧=⎪⎨⎪=⎩ ∴24cos 5ρθ=,点P 的极坐标方程为10cos ρθ=,[0,)2πθ∈. 23.解:(1)当2m =-时,41,0,3()|2||23|21,0,2345,.2x x f x x x x x x ⎧⎪+≥⎪⎪=++-=-<<⎨⎪⎪--≤-⎪⎩当413,0,x x +≤⎧⎨≥⎩解得102x ≤≤;当302x -<<,13≤恒成立;当453,3,2x x --≤⎧⎪⎨≤-⎪⎩解得322x -≤≤-, 此不等式的解集为1|22x x ⎧⎫-≤≤⎨⎬⎩⎭. (2)令233,0,22()()2353,,2x m x x g x f x x x x m x x ⎧--++-≤<⎪⎪=--=⎨⎪--+-≤-⎪⎩当302x -≤<时,22'()1g x x=-+,当0x <时,'()0g x ≥,所以()g x在[上单调递增,当32x -≤≤'()0g x ≤,所以()g x在3[,2-上单调递减,所以min ()(g x g =30m =+≥,所以3m ≥-, 当32x ≤-时,22'()50g x x =-+<,所以()g x 在3(,]2-∞-上单调递减, 所以min 335()()026g x g m =-=+≥, 所以356m ≥-,综上,3m ≥-.。