东北三校(哈尔滨师大附中、东北师大附中、辽宁省实验中学)2019高三第一次联合考试数学理
东北三省三校(哈尔滨师大附中、东北师大附中、辽宁省实验中学)2019届高三第一次模拟数学(理)
.
【点睛】
本题主要考查了概率和统计案例综合,属于基础题
.
19.如图,在三棱锥
中,
与
都为等边三角形,且侧面
与底面 互相垂直,
为 的中点,点 在线段 上,且
, 为棱 上一点 .
( 1)试确定点 的位置,使得
平面
( 2)在( 1)的条件下,求二面角
; 的余弦值 .
· 7·
【答案】 (1) 见证明; (2) 【解析】 (1) 根据题意,延长
三、解答题
17.设函数 ( 1)当
时,求函数
. 的值域;
( 2)
中,角
的对边分别为
,且
,
,
【答案】 (1)
(2)
· 4·
.
,求
的面积 .
【解析】( 1)先将函数
利用和差角、降幂公式、辅助角公式进行化简得
,再根据 x 的取值,求得值域;
( 2)根据第一问求得角 A 面积公式求得面积 . 【详解】
,再根据正弦定理求得角 B ,然后再求得角 C 的正弦值和边 b,利用
,
B.
,
C.
,
,
【答案】 C
D.
,
,
10.双曲线 的动点,且 A. 【答案】 D
的左焦点为
,点 的坐标为
周长的最小值为 8,则双曲线的离心率为(
)
,点 为双曲线右支上
B.
C.2
D.
11.各项均为正数的等比数列
的前 项和 ,若
,
A.4 【答案】 C
B. 6
C.8
12.
中,
,
,
,
中,
A.
B.
C.
东北三省三校(哈师大附中、东北师大附中、辽宁省实验中学)2023-2024学年高三下学期第一次联合模
东北三省三校(哈师大附中、东北师大附中、辽宁省实验中学)2023-2024学年高三下学期第一次联合模拟考化学试卷学校:___________姓名:___________班级:___________考号:___________一、单选题1.“神舟”飞天,逐梦科技强国。
下列说法中正确的是A.神舟飞船返回舱系统复合材料中的酚醛树脂属于有机高分子材料B.空间站的太阳能电池板的主要材料是二氧化硅C.飞船返回舱表面的耐高温陶瓷材料属于传统无机非金属材料D.神舟飞船的推进系统中使用的碳纤维属于有机高分子材料2.下列化学用语或表述正确的是A.基态氧原子的轨道表示式:B.甲醛分子的空间填充模型:C.用电子式表示HCl的形成过程:D.钢铁发生吸氧腐蚀时的负极反应式:O2+2H2O+4e-=4OH-3.奥司他韦是一种口服活性流感病毒神经氨酸酶抑制剂,分子结构如图所示。
下列说法正确的是A.该分子含有4种官能团B.与互为同系物C.分子式为C16H28N2O4D.该分子可发生取代、加成、消去、氧化反应4.设N A为阿伏加德罗常数的值。
下列说法正确的是A.标准状况下,11.2L环庚烷中氢原子数目为7N AB.13g苯、乙炔的混合物中所含氢原子数目为N AC.2.4gMg在空气中燃烧生成MgO和Mg3N2,转移电子数目为0.1N AD.1mol NH4+中含有完全相同的N—H共价键的数目为3N A5.邻二氮菲能与Fe2+发生显色反应,生成橙红色螯合物,用于Fe2+检验,化学反应如下。
下列说法正确的是A.邻二氮菲的核磁共振氢谱有6组吸收峰B.元素的电负性顺序:N>H>C>FeC.每个螯合物离子中含有2个配位键D.用邻二氮菲检验Fe2+时,需要调节合适的酸碱性环境6.下列离子方程式正确的是A.将少量SO2通入Ca(ClO)2溶液中:SO2+Ca2++ClO—+H2O=CaSO4↓+Cl—+2H+ B.向乙二醇溶液中加入足量酸性高锰酸钾溶液:5+84MnO-+24+H=5+82+Mn+22H2OC.向饱和Na2CO3溶液中通入过量CO2:CO23-+CO2+H2O=2HCO3-D.向Fe(NO3)3溶液中加入过量HI溶液:Fe3++12H++3NO3-+10I—=Fe2++5I2+6H2O+3NO↑7.2022年度化学领域十大新兴技术之一的钠离子电池(Sodium-ion battery)是一种二次电6C+NaTMO2,下列说法错误的是池,电池总反应为:Na x C6+Na1-x TMO2 放电充电A.放电时正极反应式:Na1-x TMO2+xNa++xe—=NaTMO2B.钠离子电池的比能量比锂离子电池高C.充电时a电极电势高于b电极D.放电时每转移1mol电子,负极质量减少23g8.下列实验对应的现象及结论均正确且两者具有因果关系的是选项实验现象结论A向淀粉碘化钾溶液中通入足量Cl2溶液先变蓝后褪色不能证明Cl2氧化性强于I2B 向5mL0.1mol/L AgNO3溶液中先滴入5滴0.1mol/L NaCl溶液,再滴入5滴0.1mol/L KI溶液先产生白色沉淀后产生黄色沉淀Ksp(AgCl)>Ksp(AgI)C 蔗糖与浓硫酸混合搅拌,用湿润的品红试纸检验其气体产物蔗糖变黑,品红试纸褪色浓硫酸具有脱水性和氧化性D向K2Cr2O7溶液中滴加NaOH溶液溶液颜色由黄色变为橙色减小H+浓度,Cr2O27-转为CrO24-A.A B.B C.C D.D9.某种钾盐具有鲜艳的颜色,其阴离子结构如图所示。
东北三省三校(哈尔滨师大附中、东北师大附中、 辽宁省实验中学)2019届高三第一次模拟数学(理)
东北三省三校2019年高三第一次联合模拟考试理科数学试卷第Ⅰ卷注意事项:1.答题前,考生须认真核对条形码上的姓名、考生号、考场号和座位号,并将其贴在指定位置,然后用0.5毫米黑色字迹签字笔将自己所在的县(市、区)、学校以及自己的姓名、考生号、考场号和座位号填写在答题卡和试卷的指定位置,并用2B 铅笔在答题卡的“考生号”处填涂考生号。
2.第Ⅰ卷每小题选出答案后,用2B 铅笔把答题卡上对应题目的答案标号涂黑;如需改动,用橡皮擦干净后,再选涂其他答案标号。
写在试卷、草稿纸或答题卡上的非答题区域均无效。
3.第Ⅱ卷必须用0.5毫米黑色字迹签字笔作答,答案必须写在答题卡各题目指定区域内相应的位置;如需改动,先画掉原来的答案,然后再写上新的答案;不能使用涂改液、胶带纸、修正带。
不按以上要求作答的答案无效。
4.考试结束后,将本试卷和答题卡一并交回。
一、选择题。
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.复数的虚部是( )A. 4B. -4C. 2D. -2【答案】D 【解析】 【分析】先将复数进行化简得,得出答案. 【详解】复数=所以虚部为-2 故选D【点睛】本题主要考查了复数的化简,属于基础题. 2.集合,,则( ) A.B.C.D.【答案】B 【解析】 【分析】先求出集合,再利用交集的定义得出答案.【详解】因为可得,集合,所以故选B【点睛】本题主要考查了交集的定义,属于基础题.3.已知向量的夹角为,,,则()A. B. C. D.【答案】C【解析】【分析】由题,先求出,可得结果.【详解】所以故选C【点睛】本题主要考查了数列的运算,属于基础题.4.设,,,则的大小关系为()A. B. C. D.【答案】A【解析】【分析】先利用是单调递减的,得出;再利用在是单调递增的,得出求得答案. 【详解】因为是单调递减的,且,所以;又因为在是单调递增的,,所以综上,故选A【点睛】本题主要考查了指数函数和幂函数的性质,来比较大小,掌握函数的性质是解题的关键.5.等差数列的前项和为,且,,则()A. 30B. 35C. 42D. 56【答案】B【解析】【分析】先根据题目已知利用公式求出公差,,再利用求和公式得出结果.【详解】因为是等差数列,所以,所以公差,根据求和公式故选B【点睛】本题主要考查了数列的求和以及性质,对于等差数列的公式的熟练运用是解题的关键,属于基础题.6.中国有十二生肖,又叫十二属相,每一个人的出生年份对应了十二种动物(鼠、牛、虎、兔、龙、蛇、马、羊、猴、鸡、猪)中的一种,现有十二生肖的吉祥物各一个,三位同学依次选一个作为礼物,甲同学喜欢牛和马,乙同学喜欢牛、狗和羊,丙同学哪个吉祥物都喜欢,如果让三位同学选取礼物都满意,则选法有()A. 30种B. 50种C. 60种D. 90种【答案】B【解析】【分析】先分情况甲选牛共有,甲选马有,得出结果.【详解】若同学甲选牛,那么同学乙只能选狗和羊中的一种,丙同学可以从剩下的10中任意选,所以共有若同学甲选马,那么同学乙能选牛、狗和羊中的一种,丙同学可以从剩下的10中任意选,所以共有所以共有种故选B【点睛】本题主要考查了排列组合,分情况选择是解题的关键,属于较为基础题.7.执行两次下图所示的程序框图,若第一次输入的的值为4,第二次输入的的值为5,记第一次输出的的值为,第二次输出的的值为,则()A. 2B. 1C. 0D. -1【答案】D【解析】【分析】根据已知的程序框图,模拟程序的执行过程,可的结果.【详解】当输入x的值为4时,第一次不满足,但是满足x能被b整除,输出;当输入x的值为5时,第一次不满足,也不满足x能被b整除,故b=3第二次满足,故输出则-1故选D【点睛】本题主要考查了程序框图,属于较为基础题.8.如图,在直角坐标系中,过坐标原点作曲线的切线,切点为分别作轴的垂线,垂足分别为,向矩形中随机撒一粒黄豆,则它落到阴影部分的概率为()A. B. C. D.【答案】A【解析】【分析】先设出切点,利用切线过原点求出切点P的坐标,再用积分求出阴影部分的面积,最后用几何概型求得结果.【详解】设切点,所以切线方程,又因为过原点所以解得所以点P因为与轴在围成的面积是则阴影部分的面积为而矩形的面积为故向矩形中随机撒一粒黄豆,则它落到阴影部分的概率为故选A【点睛】本题主要考查了几何概型,但是解题的关键是在于对于切点和积分的运用是否熟练,属于中档题.9.已知是不重合的平面,是不重合的直线,则的一个充分条件是()A. ,B. ,C. ,,D. ,,【答案】C【解析】【分析】由题意,分别分析每个答案,容易得出当,,得出,再得出,得出答案.【详解】对于答案A:,,得出与是相交的或是垂直的,故A错;答案B:,,得出与是相交的、平行的都可以,故B错;答案C:,,得出,再得出,故C正确;答案D:,,,得出与是相交的或是垂直的,故D错故选C【点睛】本题主要考查了线面位置关系的知识点,熟悉平行以及垂直的判定定理和性质定理是我们解题的关键所在,属于较为基础题.10.双曲线的左焦点为,点的坐标为,点为双曲线右支上的动点,且周长的最小值为8,则双曲线的离心率为()A. B. C. 2 D.【答案】D【解析】【分析】先根据双曲线的定义求出,然后据题意周长的最小值是当三点共线,求出a的值,再求出离心率即可.【详解】由题易知双曲线的右焦点,即,点P为双曲线右支上的动点,根据双曲线的定义可知所以周长为:当点共线是,周长最小即解得故离心率故选D【点睛】本题主要考查了双曲线的定义和性质,熟悉性质和图像是解题的关键,属于基础题.11.各项均为正数的等比数列的前项和,若,,则的最小值为()A. 4B. 6C. 8D. 12【答案】C【解析】【分析】由题意,根据等比中项得出,然后求得公比首项,再利用公式求得,通项带入用基本不等式求最值.【详解】因为,且等比数列各项均为正数,所以公比首项所以,通项所以当且紧当所以当时,的最小值为8故选C【点睛】本题考查了等比数列的通项、求和以及性质,最后还用到基本不等式,属于小综合题型,属于中档题,需要注意的是利用基本不等式要有三要素“一正、二定、三相等”.12.中,,,,中,,则的取值范围是()A. B.C. D.【答案】C【解析】【分析】根据题意,建立直角坐标系,设点D的坐标,然后分析点D的位置,利用直线的夹角公式,求得点D的轨迹方程为圆的一部分,然后利用圆的相关知识求出最大最小值即可.【详解】由题,以点B为坐标原点,AB所在直线为x轴,BC所在直线为y轴建立直角坐标系;设点,因为,所以由题易知点D可能在直线AB的上方,也可能在AB的下方;当点D可能在直线AB的上方;直线BD的斜率;直线AD的斜率由两直线的夹角公式可得:化简整理的可得点D的轨迹是以点为圆心,半径的圆,且点D在AB的上方,所以是圆在AB上方的劣弧部分;此时CD的最短距离为:当当点D可能在直线AB的下方;同理可得点D的轨迹方程:此时点D的轨迹是以点为圆心,半径的圆,且点D在AB的下方,所以是圆在AB下方的劣弧部分;此时CD的最大距离为:所以CD的取值范围为【点睛】本题主要考察了直线与圆的综合知识,建系与直线的夹角公式是解题的关键,属于难题.第Ⅱ卷二、填空题(将答案填在答题纸上)13.已知满足约束条件:,则的最大值是______.【答案】3【解析】【分析】根据约束条件,画出可行域,再求出与的交点,带入求出答案.【详解】满足约束条件:,可行域如图:解得由题,当目标函数过点A时取最大值,即故答案为3【点睛】本题主要考查了简单的线性规划,画出可行域是解题的关键,属于基础题.14.甲、乙、丙三人中,只有一个会弹钢琴,甲说:“我会”,乙说:“我不会”,丙说:“甲不会”,如果这三句话,只有一句是真的,那么会弹钢琴的是_____.【答案】乙【解析】【分析】根据题意,假设结论,根据他们所说的话推出与题意矛盾的即为错误结论,从而得出答案.【详解】假设甲会,那么甲、乙说的都是真话,与题意矛盾,所以甲不会;假设乙会,那么甲、乙说的都是假话,丙说的是真话,符合题意,假设丙会,那么乙、丙说的都是真话,与题意矛盾;故答案是乙【点睛】本题主要考查了推理证明,属于基础题.15.已知函数是定义域为的偶函数,且为奇函数,当时,,则__.【答案】【解析】【分析】先由题意,是定义域为的偶函数,且为奇函数,利用函数的奇偶性推出的周期,可得,然后带入求得结果.【详解】因为为奇函数,所以又因为是定义域为的偶函数,所以即所以的周期因为所以故答案为【点睛】本题主要考查了函数的性质,函数性质的变形以及公式的熟记是解题的关键,属于中档题.16.四面体中,底面,,,则四面体的外接球的表面积为____.【答案】【解析】【分析】根据题意,证明出CD平面ABC,从而证明出CD AC,然后取AD的中点O,可得OC=OA=OB=OD,求出O为外接球的球心,然后求得表面积即可.【详解】由题意,可得BC CD,又因为底面,所以AB CD,即CD平面ABC,所以CD AC取AD的中点O,则OC=OA=OB=OD故点O为四面体外接球的球心,因为所以球半径故外接球的表面积故答案为【点睛】本题主要考查了三棱锥的外接球知识,找出球心的位置是解题的关键,属于中档题.三、解答题(解答应写出文字说明、证明过程或演算步骤.)17.设函数.(1)当时,求函数的值域;(2)中,角的对边分别为,且,,,求的面积.【答案】(1) (2)【解析】【分析】(1)先将函数利用和差角、降幂公式、辅助角公式进行化简得,再根据x的取值,求得值域;(2)根据第一问求得角A,再根据正弦定理求得角B,然后再求得角C的正弦值和边b,利用面积公式求得面积.【详解】(Ⅰ)∵,∴∴∴函数的值域为.(Ⅱ)∵∴∵,∴,∴,即由正弦定理,,∴∴,,∴∴【点睛】本题主要考查了三角函数综合和解三角形,解题的关键是在于三角恒等变化公式的利用(和差角、降幂、辅助角公式的合理利用)以及正弦定理的变化应用,属于较为基础题.18.世界卫生组织的最新研究报告显示,目前中国近视患者人数多达6亿,高中生和大学生的近视率均已超过七成,为了研究每周累计户外暴露时间(单位:小时)与近视发病率的关系,对某中学一年级200名学生进行不记名问卷调查,得到如下数据:(1)在每周累计户外暴露时间不少于28小时的4名学生中,随机抽取2名,求其中恰有一名学生不近视的概率;(2)若每周累计户外暴露时间少于14个小时被认证为“不足够的户外暴露时间”,根据以上数据完成如下列联表,并根据(2)中的列联表判断能否在犯错误的概率不超过0.01的前提下认为不足够的户外暴露时间与近视有关系?附:【答案】(1) (2)见解析【解析】【分析】(1)根据题意,时间不少于28小时的4名学生中,近视1名,不近视3名,所以恰好一名近视:,4名学生抽2名共有:,然后求得其概率.(2)先根据表格得出在户外的时间与近视的人数分别是多少,完成联表,然后根据公式求得的观测值,得出结果.【详解】(Ⅰ)设“随机抽取2名,其中恰有一名学生不近视”为事件,则故随机抽取2名,中恰有一名学生不近视的概率为.(Ⅱ)根据以上数据得到列联表:所以的观测值,故能在犯错误的概率不超过0.01的前提下认为不足够的户外暴露时间与近视有关系.【点睛】本题主要考查了概率和统计案例综合,属于基础题.19.如图,在三棱锥中,与都为等边三角形,且侧面与底面互相垂直,为的中点,点在线段上,且,为棱上一点.(1)试确定点的位置,使得平面;(2)在(1)的条件下,求二面角的余弦值.【答案】(1)见证明;(2)【解析】【分析】(1)根据题意,延长交于点,要使得平面;即,然后确定出点E的位置即可;(2)建立空间直角坐标系,求出平面的法向量,然后根据二面角的夹角公式求得余弦值即可. 【详解】(Ⅰ)在中,延长交于点,,是等边三角形为的重心平面, 平面,,即点为线段上靠近点的三等分点(Ⅱ)等边中,,,,交线为,如图以为原点建立空间直角坐标系点在平面上,所以二面角与二面角为相同二面角.设,则,设平面的法向量,则即,取,则又平面,,则,又二面角为钝二面角,所以余弦值为 .【点睛】本题主要考查了立体几何,熟练线面之间的平行、垂直的判定定理和性质定理是证明的关键,以及求出平面的法向量是解决第二问的关键,属于中档题.20.已知椭圆:的左、右两个顶点分别为,点为椭圆上异于的一个动点,设直线的斜率分别为,若动点与的连线斜率分别为,且,记动点的轨迹为曲线. (1)当时,求曲线的方程;(2)已知点,直线与分别与曲线交于两点,设的面积为,的面积为,若,求的取值范围.【答案】(1) (2)【解析】【分析】(1)由题意设,,再表示出得出.然后求得结果.(2) 由题求出直线的方程为:,直线的方程为:,然后分别与曲线联立,求得点E、F的纵坐标,然后再带入面积公式表示出再利用函数的单调性求得范围.【详解】(Ⅰ)设,则,因为,则所以,整理得.所以,当时,曲线的方程为.(Ⅱ)设. 由题意知,直线的方程为:,直线的方程为:.由(Ⅰ)知,曲线的方程为,联立,消去,得,得联立,消去,得,得设则在上递增又,的取值范围为【点睛】本题主要考查了圆锥曲线的综合,审题仔细以及计算细心是解题的关键,属于较难题.21.已知(为自然对数的底数),.(1)当时,求函数的极小值;(2)当时,关于的方程有且只有一个实数解,求实数的取值范围. 【答案】(1)见解析;(2)见解析【解析】【分析】(1)由题意,当时,然后求导函数,分析单调性求得极值;(2)先将原方程化简,然后换元转化成只有一个零点,再对函数进行求导,讨论单调性,利用零点存在性定理求得a的取值.【详解】(Ⅰ)当时,令解得(Ⅱ)设,令,,,设,,由得,,在单调递增,即在单调递增,,①当,即时,时,,在单调递增,又,故当时,关于的方程有且只有一个实数解.②当,即时,,又故,当时,,单调递减,又,故当时,,在内,关于的方程有一个实数解.又时,,单调递增,且,令,,,故在单调递增,又故在单调递增,故,故,又,由零点存在定理可知,.【点睛】本题主要考查了导函数的应用,讨论单调性和零点的存在性定理是解题的关键点,属于难题.如果函数y= f(x)在区间[a,b]上的图象是连续不断的一条曲线,并且有f(a).f(b)<0,那么,函数y= f(x)在区间(a,b)内有零点,即存在c∈(a,b),使得f(c)=0,这个c也就是方程f(x)= 0的根.22.选修4-4:坐标系与参数方程在直角坐标系中,曲线的参数方程为(为参数),直线的方程为,以坐标原点为极点,以轴正半轴为极轴建立极坐标系.(1)求曲线的极坐标方程;(2)曲线与直线交于两点,若,求的值.【答案】(1);(2)【解析】【分析】(1)先将曲线的参数方程化为普通方程,然后再化为极坐标方程;(2)由题意,写出直线的参数方程,然后带入曲线的普通方程,利用韦达定理表示出求得结果即可.【详解】(1)由题,曲线的参数方程为(为参数),化为普通方程为:所以曲线C的极坐标方程:(2)直线的方程为,的参数方程为为参数),然后将直线得参数方程带入曲线C的普通方程,化简可得:,所以故解得【点睛】本题主要考查了极坐标和参数方程的综合,极坐标方程,普通方程,参数方程的互化为解题的关键,属于基础题.23.选修4-5:不等式选讲已知函数.(1)若不等式对恒成立,求实数的取值范围;(2)设实数为(1)中的最大值,若实数满足,求的最小值. 【答案】(1);(2)【解析】【分析】(1)由不等式性质,解出a的值即可;(2)先求得m的值,然后对原式配形,可得再利用柯西不等式,得出结果.【详解】(1)因为函数恒成立,解得;(2)由第一问可知,即由柯西不等式可得:化简:即当且紧当:时取等号,故最小值为【点睛】本题主要考查了不等式选讲,不等式的性质以及柯西不等式,熟悉柯西不等式是解题的关键,属于中档题.。
辽宁省实验中学、东北师大附中、哈师大附中高三第一次联合考试理科综合化学试卷
辽宁省实验中学、东北师大附中、哈师大附中高三第一次联合考试理科综合化学试卷第Ⅰ卷(选择题共130分)一、共12小题,每小题2分,共24分,在每小题给出的四个选项中只有一个选项符合题意。
1.含有C、H、O、N四种化学元素的有机物是下列哪一组①甘氨酸②葡萄糖③胆固醇④核糖核酸A.①②③ B.②③④C.①②④ C.①③④2.和植物激素可能有关的一组是①棉花摘心②培育多倍体③枝条扦插④生产无籽番茄⑤培育单倍体A.①③④ B.①④⑤C.③④⑤D.①③⑤3.下列各元素中,在自然界存在游离态的是A.碘 B.硫C.磷D.锂4.在光滑斜面上下滑的物质受到的力是A.重力和斜面的支持力B.重力、斜面的支持力和加速力C.重力、下滑力和斜面的支持力D.重力、斜面支持力、下滑力和正压力5.一只小白鼠细胞中的DNA分子的一个片断,含有78个碱基对,它所决定的多肽链片断中至多含有的氨基酸是A.30个B.26个C.22个D.18个6.在下列哪个系统中,昆虫最有可能在长期的进化过程中形成警戒色的适应A.枯叶、无毒蛇和食谷鸟B.草地、无毒蛇和食虫鸟C.枯叶、有毒昆虫和食谷鸟D.草地、有毒昆虫和食虫鸟7.三个并联电阻的阻值之比是1∶2∶3,则通过它们的电流强度之比为A.1∶2∶3B.3∶2∶1C.6∶3∶2D.2∶3∶68.下列各组物质的混合物能用分液漏斗直接分离的是A.甘油和水B.溴和四氯化碳C.苯酚和乙醇D.溴苯和氢氧化钠溶液9.在光合作用实验里,如果所用的水中有0.35%的水分含18O,二氧化碳中有0.9%的二氧化碳分子含18O,那幺,植物进行光合作用释放的氧气中,含18O的比例为A.0.7%B.0.9%C.0.35%D.0.45%10.在进化的过程中有关生物类型出现顺序的几种描述,可能性最大的是A.自养、厌氧异养、需氧异养B.需氧异养、厌氧异养、自养C.厌氧异养、需氧异养、光能合成自养D.厌氧异养、光能合成自养、需氧异养11.有关胶体的说法中,正确的是A.胶体都是均匀透明的液体B.胶体溶液的电泳现象,证明胶体带有电荷C.胶体产生丁达尔现象是由胶体微粒的大小决定的D.胶体能透过半透膜,所以可用渗析法提纯胶体12.一束光线从空气射入水中,入射角是40°,在界面上光的一部分被反射,另一部分被折射,则反射光线与折射光线的夹角A.小于40°B.在40°和50°之间C.大于40°D.在100°和140°之间二、本题共17小题,每小题3分,共51分,在每小题给出的四个选项中另有一个选项符合题意。
最新东北三省三校哈尔滨师大附中、东北师大附中、辽宁省实验中学届高三第一次模拟文科综合试题含答案
2019年东北三省三校第一次模拟考试文综地理详解答案1.D2.C3.B4.C5.D6.A7.C8.A9.C 10.B 11.D1.D 【解析】A选项电子商务取代传统商业叙述过于绝对,电子商务只是部分取代了传统商业;B选项物流业先于电子商务产生,目前两者关系是相辅相成的。
C选项区域经济联系目前正在逐渐增强。
D选项商业布局区位因素,如市场、交通等因素对商业的影响正在减弱,所以影响商业布局的区位因素发生了变化。
2.C 【解析】电子商务发展依赖于信息、流通等部门,导致商业网络组织形式发生变化的主要因素是科技信息的发展。
3.B 【解析】 A选项云南全年的蔬菜总产量据图计算应为1880万吨左右,而广西为2780万吨左右,故云南产量小于广西。
B选项经计算海南省总蔬菜产量为600万吨左右,是三省区最低的省(区)。
C选项广西冬春菜产量占比高主要是北方消费市场的季节差的需求。
D选项海南与云南种植蔬菜的热量差异不大。
4.C 【解析】“南菜北运”可以促进生产地区与市场的融合,丰富农产品的种类,促进市场供应,提高人民生活水平,被称为“菜篮子”工程,但不可能促进全国各地均衡发展,故不属于选项为C选项。
5.D 【解析】从题干可知,河口地区是径流和潮流相互作用的区域,在径流势力比潮流势力强的河口,会导致泥沙大量堆积,则形成三角洲式河口;在河流势力比潮流势力弱时,会导致海水强烈冲刷河口地区,形成三角港式河口。
甲乙两河口都有可能出现咸潮现象,但乙河口为三角港式河口,则乙河口地区潮流势力更强,更易出现海水倒灌,形成咸潮,故A选项错误;甲河口径流势力比潮流势力强,更容易泥沙堆积,形成三角洲,B选项错误;试题中能反映出河口地区径流与潮流的相互作用关系,但无法判断河流输沙量的大小,C错误;乙河口为三角港式河口,受海水的侵蚀更严重,D选项正确。
6.A 【解析】近几年甲河口区“前缘急坡”后退明显,说明河口地区泥沙沉积减少,海水侵蚀速度大于河流沉积速度,中上游修水库会导致河流携带的泥沙在库区沉积,而入海泥沙减少,A选择正确;流域植被破坏会导致河流含沙量增加,河口地区泥沙沉积量增加,会使“前缘急坡”向海洋扩展,C选项错误;地壳运动和全球变暖导致的海平面上升,都是极其缓慢的过程,不会出现近几年“前缘急坡”的明显后退,B、D选项错误。
2024届东北三省三校(哈师大、辽宁省实验中学、东北师大)高三下学期第一次联合模拟考试语文试题及答案
哈尔滨师大附中东北师大附中辽宁省实验中学2024年高三第一次联合模拟考试语文试卷材料一:自古以来,中华文明在继承创新中不断发展,在应时处变中不断升华,在世界上影响深远,有力推动了人类文明发展进程。
中华文明在对外传播中向世界贡献了深刻的思想体系、丰富的科技文化艺术成果、独特的制度创造,为人类文明进步作出了突出贡献注意事项:1.答卷前,考生务必将自己的姓名、准考证号填写在答题卡上。
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一、现代文阅读(35分)(一)现代文阅读Ⅰ(本题共5小题,19分)阅读下面的文字,完成1~5题。
每一种文明都扎根于自己的生存土壤,凝聚着一个国家、一个民族的非凡智慧和精神追求,都有自己存在的价值。
中华文明有着一贯的处世之道,有着鲜明的价值导向,有着永恒的精神气质,有着内在的生存理念。
独特的文化传统、独特的历史命运、独特的基本国情,注定了我们必然要走适合自己特点的发展道路,也决定着增强中华文明传播力影响力的重要原则就是坚守中华文化立场。
不同的文化立场深刻影响着实践主体看待文化问题的角度和方式。
在坚守中华文化立场中增强中华文明传播力影响力,就要坚守中国特色社会主义文化发展方向,坚定文化自信、培育文化之根、筑牢文化之魂。
尤其在讲好中国故事、传播好中国声音上,要更加注重展示中国之路、中国之治、中国之理背后的思想力量和精神力量,让世界全方位、多角度了解博大精深的中华文化。
文明因交流而多彩,文明因互鉴而丰富。
习近平总书记指出:“文明交流互鉴,是推动人类文明进步和世界和平发展的重要动力。
”深化文明交流互鉴,要以海纳百川、开放包容的广阔胸襟,融合世界各民族文化精粹,广泛开展同各国的文化交流、学习借鉴世界一切优秀文明成果。
从历史上的佛教东传,到近代以来的马克思主义和社会主义思想传入中国,再到改革开放以来全方位对外开放,中华文明始终在兼收并蓄中历久弥新。
东北三省三校(哈师大附中、东北师大附中、辽宁实验中学)2019届高三第一次模拟考试数学试卷(文) 含解析
东北三省三校(哈尔滨师大附中、东北师大附中、辽宁省实验中学)2019届高三第一次模拟考试数学试题(文)一、选择题: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.复数的虚部是()A. 4B. -4C. 2D. -2【答案】D【解析】复数=,所以虚部为-2,故选D.2.集合,,则()A. B.C. D.【答案】B【解析】因为可得,集合,所以故选B3.已知向量的夹角为,,,则()A. B. C. D.【答案】C【解析】所以故选C.4.设直线与圆相交于两点,且,则圆的面积为()A. B. C. D.【答案】C【解析】圆的圆心坐标为,半径为,,直线与圆相交于两点,且,圆心到直线的距离,所以,解得,圆的半径,所以圆的面积,故选C.5.等差数列的前项和为,且,,则()A. 30B. 35C. 42D. 56 【答案】B【解析】因为是等差数列,所以,所以公差,根据求和公式故选B6.已知,,则()A. B. C. D.【答案】A【解析】因为,所以,所以,且解得,故选A.7.执行两次下图所示的程序框图,若第一次输入的的值为4,第二次输入的的值为5,记第一次输出的的值为,第二次输出的的值为,则()A. 2B. 1C. 0D. -1 【答案】D【解析】当输入x的值为4时,第一次不满足,但是满足x能被b整除,输出;当输入x的值为5时,第一次不满足,也不满足x能被b整除,故b=3第二次满足,故输出则-1故选D8.设,,,则的大小关系为()A. B. C. D. 【答案】B【解析】因为指数函数是减函数,,所以<,即;因为幂函数是增函数,,所以>,即,所以,故选B.9.已知是不重合的平面,是不重合的直线,则的一个充分条件是()A. ,B. ,C.,, D. ,,【答案】C【解析】对于答案A:,,得出与是相交的或是垂直的,故A错;答案B:,,得出与是相交的、平行的都可以,故B错;答案C:,,得出,再得出,故C正确;答案D: ,,,得出与是相交的或是垂直的,故D错故选C10.圆周率是圆的周长与直径的比值,一般用希腊字母表示,早在公元480年左右,南北朝时期的数学家祖冲之就得出精确到小数点后7位的结果,他是世界上第一个把圆周率的数值计算到小数点后第七位的人,这比欧洲早了约1000年,在生活中,我们也可以通过设计下面的实验来估计的值;从区间内随机抽取200个数,构成100个数对,其中满足不等式的数对共有11个,则用随机模拟的方法得到的的近似值为()A. B. C. D.【答案】A【解析】在平面坐标系中作出边长为1的正方形和单位圆,则符合条件的数对表示的点在轴上方、正方形内且在圆外的区域,区域面积为,由几何概型概率公式可得解得,故选A.11.双曲线的左焦点为,点的坐标为,点为双曲线右支上的动点,且周长的最小值为8,则双曲线的离心率为()A. B. C. 2 D.【答案】D【解析】由题易知双曲线的右焦点,即,点P为双曲线右支上的动点,根据双曲线的定义可知所以周长为:当点共线是,周长最小即解得故离心率故选D.12.若函数在区间上有两个极值点,则实数的取值范围是()A. B. C. D.【答案】D【解析】,可得,要使恰有2个正极值点,则方程有2个不相等的正实数根,即有两个不同的正根,的图象在轴右边有两个不同的交点,求得,由可得在上递减,由可得在上递增,,当时,;当时,所以,当,即时,的图象在轴右边有两个不同的交点,所以使函数在区间上有两个极值点,实数的取值范围是,故选D.二、填空题13.已知满足约束条件:,则的最大值是______.【答案】3【解析】满足约束条件:,可行域如图:解得由题,当目标函数过点A时取最大值,即故答案为314.甲、乙、丙三人中,只有一个会弹钢琴,甲说:“我会”,乙说:“我不会”,丙说:“甲不会”,如果这三句话,只有一句是真的,那么会弹钢琴的是_____.【答案】乙【解析】假设甲会,那么甲、乙说的都是真话,与题意矛盾,所以甲不会;假设乙会,那么甲、乙说的都是假话,丙说的是真话,符合题意,假设丙会,那么乙、丙说的都是真话,与题意矛盾;故答案是乙15.四面体中,底面,,,则四面体的外接球的表面积为____.【答案】【解析】由题意,可得BC CD,又因为底面,所以AB CD,即CD平面ABC,所以CD AC取AD的中点O,则OC=OA=OB=OD故点O为四面体外接球的球心,因为所以球半径故外接球的表面积故答案为三、解答题(解答应写出文字说明、证明过程或演算步骤.)16.设函数.(1)当时,求函数的值域;(2)中,角的对边分别为,若,且,求的面积. 解:(1)∵,∴,∴∴函数的值域为;(2)∵,∴,∵,∴,∴,即由余弦定理,,∴,即又,∴∴.17.世界卫生组织的最新研究报告显示,目前中国近视患者人数多达6亿,高中生和大学生的近视率均已超过七成,为了研究每周累计户外暴露时间(单位:小时)与近视发病率的关系,对某中学一年级200名学生进行不记名问卷调查,得到如下数据:(1)在每周累计户外暴露时间不少于28小时的4名学生中,随机抽取2名,求其中恰有一名学生不近视的概率;(2)若每周累计户外暴露时间少于14个小时被认证为“不足够的户外暴露时间”,根据以上数据完成如下列联表,并根据(2)中的列联表判断能否在犯错误的概率不超过0.01的前提下认为不足够的户外暴露时间与近视有关系?附:P解:(1)设“随机抽取2名,其中恰有一名学生不近视”为事件,则故随机抽取2名,中恰有一名学生不近视的概率为.(2)根据以上数据得到列联表:所以的观测值,故能在犯错误的概率不超过0.01的前提下认为不足够的户外暴露时间与近视有关系. 18.如图,四棱锥中,底面是平行四边形,平面,垂足为,在上,且,,,四面体的体积为.(1)求点到平面的距离;(2)若点是棱上一点,且,求的值.解:(1)(方法一):由已知∴∵⊥平面,平面,∴∴∵∴设点到平面的距离为,∵,法二:由已知∴∵⊥平面,平面∴平面⊥平面∵平面平面在平面ABCD内,过作⊥,交延长线于,则⊥平面∴的长就是点到平面的距离在中,==∴点到平面的距离为(2)在平面内,过作⊥于,连结,又因为⊥,∴⊥平面,平面∴⊥⊥平面,平面∴⊥∴∥由⊥得:19.已知分别是椭圆:的左右焦点,点在椭圆上,且抛物线的焦点是椭圆的一个焦点.(1)求椭圆的标准方程;(2)过点作不与轴重合的直线,设与圆相交于两点,且与椭圆相交于两点,当时,求的面积.解:(1)焦点为,则,解得,所以椭圆的标准方程为(2)由已知,可设直线方程为,联立得易知则=.因为,所以,解得.联立,得,设,则20.已知函数(为自然对数的底数),.(1)当时,求函数的极小值;(2)若当时,关于的方程有且只有一个实数解,求的取值范围.解:(1)当时,,,令则列表如下:所以.(2)设,,设,,由得,,,在单调递增,即在单调递增,,①当,即时,时,,在单调递增, 又,故当时,关于的方程有且只有一个实数解,符合题意.②当,即时,由(1)可知,所以,又故,当时,,单调递减,又,故当时,,在内,关于的方程有一个实数解1.又时,,单调递增,且,令,,,故在单调递增,又在单调递增,故,故,又,由零点存在定理可知,,故在内,关于的方程有一个实数解.又在内,关于的方程有一个实数解1,不合题意.综上,.21.选修4-4:坐标系与参数方程在直角坐标系中,曲线的参数方程为(为参数),直线的方程为,以坐标原点为极点,以轴正半轴为极轴建立极坐标系.(1)求曲线的极坐标方程;(2)曲线与直线交于两点,若,求的值.解:(1)由题,曲线的参数方程为(为参数),化为普通方程为:所以曲线C的极坐标方程:(2)直线的方程为,的参数方程为为参数),然后将直线得参数方程带入曲线C的普通方程,化简可得:,所以故解得22.选修4-5:不等式选讲已知函数.(1)若不等式对恒成立,求实数的取值范围;(2)设实数为(1)中的最大值,若实数满足,求的最小值.解:(1)因为函数恒成立,解得;(2)由第一问可知,即由柯西不等式可得:化简:即当且紧当:时取等号,故最小值为。
东北三省三校(哈尔滨师大附中、东北师大附中、 辽宁省实验中学)2019届高三第一次模拟英语试题(原卷版)
哈师大附中东北师大附中辽宁省实验中学2019年高三第一次联合模拟考试英语试卷时间:120分钟满分:150分注意事项:1.答第I卷前,考生务必将自己的姓名、准考证号填写在本试卷和答题卡相应位置上。
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第I卷选择题(满分100分)第一部分听力(共两节,满分30分)第一节(共5小题;每小题1.5分,满分7.5分)听下面5段对话。
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1.【此处有音频,请去附件查看】How much will the woman pay?A. $12.B. $30.C. $42.2.【此处有音频,请去附件查看】When will the speakers meet?A. On WednesdayB. On ThursdayC. On Friday3.【此处有音频,请去附件查看】Who is Miss Jones?A. The man’s classmate.B. The man’s teacher.C. The man’s sister.4.【此处有音频,请去附件查看】Where does the man most probably work?A. In a shop.B. On a farm.C. In an office.5.【此处有音频,请去附件查看】What will the weather be like at midday tomorrow?A. Stormy.B. Cloudy.C. Thundery.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。
2019年哈师大附中、东北师大附中、辽宁省实验中学联考高考英语一模试卷
2019年哈师大附中、东北师大附中、辽宁省实验中学联考高考英语一模试卷一、阅读理解(本大题共15小题,共30.0分)AHello,The International Student Center has heard of several frauds(诈骗)that are targeting international students.Someone may call and say that they are from:• Immigration Canada• home country's Embassy• Canada Revenue Agency• Police DepartmentIn most situations,the caller will request that you make a payment or you will face serious consequences when returning to your home country.They may talk or threaten until you make a payment.While there is no way that these fraudsters can know you are an international student (they call Canadians too),here are some things that you should know in order to better protect yourself:• UTSC provides you with FREE Immigration advising and application help (for Study&Work Permits,Visas,Permanent Residence,and Citizenship).• Canada Revenue Agency (CRA),Immigration,Refugees and Citizenship Canada (IRCC),and Canadian Border Services Agency (CBSA)will not call you,and will not ask for money or personal information by phone.If you call them,you will have to identify yourself.• Embassies will not threaten you to make a payment or request an investigation fee due to a fake (伪造的)passport.• Never feel like you need to pay anyone money right away.Ask for an employee number and hang up.You can call back the company (find their number online)and ask about your situation to confirm.• Be skeptical of anyone asking you to make a payment.• Think twice before clicking the we blinks provided and make sure they will actually go where they say.• If you feel that you have been the victim of a fraud,you should report this to the police in the region where you live (e.g.Toronto Police Services).You can also inform Campus Police.• If you're not sure about something,WAIT.Come to the ISC (IC-350)and meet with a Transition Advisor.We can help you understand what's happening.Kendel ChitolieInternational Student Advisor,RISIA S700907International Student Centre1.It may be a fraud if the caller asking for money says he/she is from ______ .A. International Student CentreB. International AirlineC. Canada Travel AgencyD. Immigration Canada2.What can be learned from the passage?______A. Embassies will not ask you to pay for an investigation fee for a fake passport.B. UTSC will ask for money if you need help for Study & Work Permits.C. You can go right away to the given weblinks and believe what they say.D. If you're not sure about something,report it to the police in the region where you live.3.Who is this e-mail intended for?______A. International students.B. Students' parents.C. Canadians.D. School teachers.BOver the years Lisa urged her sister Helen to prepare for her old age.Now they passed sixty.Lisa had a big house,Helen had the clothes on her back.Lisa had hated being a child and couldn't wait to grow up and buy herself everything.What Helen wanted was to go outside and play.When anyone would hire her,Lisa put herself to work.She never touched a penny of her money though her young mouth watered for ice cream and candy.When the dimes (一角硬币)added up to dollars,she lost her taste for sweets.And her bankbook became her most precious possession.Helen had a boyfriend Harry whose only ambition was to play a horn.That Helen married Harry straight out of high school was not surprising.Two or three times Lisa was halfway persuaded,but to give up a job that paid well for a homemaking job that paid nothing was a risk she was unable to take.Helen's married life was nothing for Lisa to envy.She and Harry played in second-rate bands.But Lisa had a big house because her boss offered her his first house at a price so low that it would be like losing money to refuse.Harry died abroad,in a third-rate hotel,with Helen crying as hard as if he had left her a fortune.He had left her nothing but his horn.Lisa knew she would have to bring her home.At dinner,Helen began to tell stories.They were rich with places and people,most of them lowly,all of them magnificent.Her face showed the joys and sorrows.Then Lisa knew why Helen didn't mention the shining room.Tonight Helen saw only what she had come seeking,a place in her sister's home and heart.She said,"That's enough about me.How have the years used you?" "I didn't use them," said Lisa regretfully."I saved for them but forgot to enjoy them.Now it's too near the end to try."Helen said,"Don't count the years that are left to us.At our time of life it's the days that count.You've too much catching up to do to waste a minute of a waking hour feeling sorry for yourself." Lisa smiled.4.In her life Lisa attached most value to ______ .A. further educationB. a job in handC. ice cream and candyD. a chance to get married5.Why did Lisa lose her taste for sweets?______A. Because she kept working and had no time to buy sweets.B. Because she worked hard to make dimes add up to dollars.C. Because she kept saving money and lost the basic desires.D. Because she had little money to afford sweets.6.In what way is the story mainly developed?______A. Changing locations.B. Giving examples.C. Creating conflicts.D. Comparing characters.7.What is probably the best title of the passage?______A. Single or Married?B. Preparations for Old AgeC. Rich or Poor?D. A House and a Bank AccountCPeter Skyllberg,a Swedish man,was trapped in his car for two months,with temperatures reaching -30o C,with no food or water,and yet he survived.The best explanation was that his vehicle created an "igloo (snow house)effect" and protected him from the extremely low temperatures and that his body would hibernate(冬眠)during this time.Can humans get into a low-energy consumption state like a bear by reserving energy,and reducing body temperature?Chinese scientists are looking for the key to regulating body temperature.Scientists have found the hypothalamus (下丘脑),an area in the central lower part of the brain,is responsible for regulating body temperature.Wang Hong,a brain scientist at the Shenzhen Institutes of Advanced Technology of the Chinese Academy of Sciences,led her team to mark the neurons (神经元)responsible for regulating body temperature in mice by means of a cutting-edge genetic biology technique.In the experiments,they injected (注射)drug into mice to make the body temperatures of the mice drop from 37℃ to 27 in two hours.The team found the change in body temperature caused no harm to the health of the mice."We don't know if we can develop a drug that can control human body temperature.We still need a lot of study." Wang said.Chinese scientists are not alone in such research.Body-cooling techniques are being used in pioneering hospitals around the world.Dutch doctors are now using low temperatures for patients who have suffered brain injuries in accidents,According to doctors working in Florence,it may even help to save the brains of babies who are born suffering from severe epileptic fits (癫痫病发作).8.Why does the author mention Peter Skyllberg?______A. To tell an amazing story.B. To introduce the topic.C. To teach survival skills.D. To explain "igloo effect".9.What did Wang Hong's team find in the experiment?______A. Genetic biology technique helped a lot.B. A drug could control human body temperature.C. The mice's health wasn't damaged by the change of body temperature.D. Hypothalamus was responsible for regulating body temperature.10.How can body-cooling techniques help people?______A. Brain injuries may be treated properlyB. People trapped in snow can survive.C. Patients with epileptic fits will be cured.D. Medical accidents can be avoided.11.The text is probably taken from ______ .A. a biology textbookB. a science fictionC. a survival brochureD. a medical magazineDFrom Madrid to Buenos Aires to Panama City to Lisbon,President Xi Jinping has tirelessly promoted the building of a community of shared future for mankind,and the Belt and Road Initiative (倡议)as a means to achieve that.But all don't see it that way.While some are quick to see its positive potentials,other countries insist on viewing it skeptically.There have been the usual doubts about the intentionbehind,although the mysterious threat they speak of is one they seem unable to explain clearly.To some of them,it is a vague assumption that investments from China are potential "debt traps"that call for extreme caution or "threats to national security".That is why the business combinations involving Chinese companies which would be mutually (相互地)beneficial have hit the rocks.The Chinese telecommunications technology giant Huawei,for instance,has found the doors to the 5G telecommunications markets of advanced countries closed to it on "national security" grounds.Likewise,the European Union has agreed on a framework regulating foreign investment (投资),particularly those from China.on the same account.Even as Chinese and Portuguese leaders discuss bilateral (双边的)cooperation under the Belt and Road,there is no lack of concern about "China's influence",But existing EU rules do not forbid Lisbon from seeking such a partnership.If Lisbon sees no harm from foreign investment,no outsider is in a position to prevent it from making a choice in its own best interests.Portuguese Prime Minister Antonio Costa has reminded EU decision-makers of his country's desire for foreign investment,and advised the latter to avoid taking "the path of protectionism".It was a timely reminder.Faring the challenges in today's world,China and the countries that have embraced the Belt and Road are convinced it is the way to common development and the world's lasting peace and stability.12.Some countries that hold a negative attitude towards the Initiative mainly doubt its______ .A. powerB. mysteryC. intentionD. potential13.What does the underlined part "hit the rocks" in Paragraph 3mean?______A. failed to work outB. become a hitC. made a differenceD. fallen into a trap14.It can be learned from the passage that ______ .A. Huawei has caused serious security problems abroadB. the EU will take relatively strict measures on Chinese investmentC. the Road and Belt Initiative has gained much popularity for "China's influence"D. China's investment in Portugal has been extremely smooth15.What is the author's attitude towards Portuguese Prime Minister's advice?______A. Negative.B. Positive.C. Doubtful.D. Unclear.二、阅读七选五(本大题共5小题,共10.0分)Running is a great way to get in shape and just about everyone can do it.Given that it's so easy to take up the sport,a lot of beginners jump right into running without actually knowing what it takes to establish a healthy routine.(1) .If you are just starting out,avoid the following things to help you increase your chances of running success.Doing too much too soonOne of the biggest mistakes beginners make is doing too much too soon.Picking up a new hobby like running is no doubt exciting.Runners need to ease into the sport before increasing the distance.(2) .(3)Beginners might think they need to run nearly every day to meet their fitness or weight-loss goals,but this couldn't be further from the truth.(4) ,especially for beginners whose muscles and bones haven't yet been conditioned for such intense (剧烈的)exercise.So it's important to give your body ample rest between workouts.Follow a training plan that includes rest days.Comparing yourself to others(5) ,You're excited about running,so you are probably reading running blogs,magazines and message boards where you might start to feel inadequate about your own running pace.Instead of getting down on yourself,remember that every runner was once a beginner and use their success as motivation!A.Not taking rest daysB.Not running every dayC.As mentioned,a healthy routine is what they attach importance toD.Running is a demanding activity which can be really hard on your bodyE.When starting out with running,it's tough not to compare yourself to othersF.It will help reduce the risk of injury,so you can continue with your new running routine G.Many make a number of common mistakes,which can interfere (干扰)with training or lead to injury16. A. A B. B C. C D. D E.E F.F G. G17. A. A B. B C. C D. D E.E F.F G. G18. A. A B. B C. C D. D E.E F.F G. G19. A. A B. B C. C D. D E.E F.F G. G20. A. A B. B C. C D. D E.E F.F G. G三、完形填空(本大题共20小题,共30.0分)Several months ago,Greece suffered from the refugee (难民)disaster.I hadn't been (21) of the Scale (规模)of it until I actually got to Greece.I(22)as manager of the Oinofyta Camp.This work is like being a(23),And I realized that I had met my(24),which was to take care of them and show them that they were loved and cared about,not(25).All of the Greek islands are(26).I have a camp that within three or four days could(27)500 people.When your life is spent getting handouts (救济的)from everyone all day,you lose your(28).I had this (29) idea that it would be great to start a business,sewing bags from leftover(30) material.Those people were the (31) people in the camp because they had a purpose.We have(32) in America who want to buy these bags now.Learning to say(33) has been one of the harder things here at the camp;the constant (34)of residents.I was so happy for them when they got their family(35),and so sad because I knew that the(36) of me being able to (37) see them again was pretty slim.My (38) kids are all asking me the same question now:"Mom,when are you coming home?" I don't know.I hope that my legacy (遗赠)here is that the refugees will always remember that I cared about them,that they were special and (39),and that they were worthy of that(40).21. A. afraid B. aware C. fond D. ashamed22. A. took over B. made for C. came up D. figured out23. A. teacher B. volunteer C. mother D. lawyer24. A. failure B. goal C. moment D. problem25. A. forced B. sheltered C. cured D. forgotten26. A. overcrowded B. abandoned C. observed D. involved27. A. employ B. train C. examine D. serve28. A. dignity B. pay C. demand D. value29. A. strange B. ordinary C. wild D. peaceful30. A. cooking B. tent C. heating D. wood31. A. saddest B. happiest C. bravest D. calmest32. A. leaders B. consultants C. workers D. purchasers33. A. goodbye B. thanks C. sorry D. hello34. A. fighting B. checking C. working D. changing35. A. anniversary B. party C. reunion D. celebration36. A. pity B. intention C. possibility D. reward37. A. ever B. never C. often D. seldom38. A. positive B. own C. adopted D. selfish39. A. unexpected B. thankful C. considerate D. important40. A. benefit B. reward C. care D. praise四、语法填空(本大题共1小题,共15.0分)41.Former First Lady Michelle Obama's memoir (回忆录)Becoming has become thebest-selling book (1) (publish)this year in the US just 15days after publication.The sales figure (two million copies)(2) (announce)by Penguin Random House last Friday.Becoming mainly tells the story about (3) Michelle has balanced work and family (4) a professional woman.The book is (5) window into the personal life of the firstAfrican-American First Lady and the first black US President.About marriage,Michelle mentions,"I married a creative thinker,and I had to remind (6) (I)that we were adapting to each other to make two individuals a solid,permanent us." In the memoir,Michelle speaks (7) (honest)of difficulties she met with in her life.The 54-year-old also criticizes (批评)US President Donald Trump,(8) (write)that she can "never forgive" him.That's because during his presidential campaign.Trump's "birther" theory that Michelle's husband was not born in the US (9) therefore was not a legal President put her family's (10) (safe)at risk.五、短文改错(本大题共1小题,共10.0分)42.英语课上,老师要求同桌之间相互修改作文.假设以下短文为你同桌所写,请你对其进行修改.短文中共有10处错误,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(A),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.每处错误及其修改均仅限一词;2.只允许修改10处,多者(从第11处起)不计分.You must have heard about Dolly and have been amazed by the first cloned animal. B ut here came a problem; should we clone humans? When being asked about this quest ion, a large number of people which are interested in the topic hold the view that it's be neficial to clone humans. Therefore, some other people, me including, are against this idea. Cloning humans can bring negative effects and wrong informations. In the first place, they may not be treated equal as normal people, which I believe will make him suffer a lot. In second place, human cloning may lead in some social disorder, and it is quite dangerous.六、书面表达(本大题共1小题,共25.0分)43.假如你是李华,你的美国笔友Terry向你询问你校暑期中文夏令营活动,请你回复邮件,内容包括:1.活动主题:文化与交流;2.活动时间;3.活动安排.注意:1.词数100左右;2.可适当增加细节,使内容充实、行文连贯.3.开头已给出,不计入总词数.Dear terry,I'm very happy to know that you are interested in our Chinese Summer Camp.Yours,Li Hua2019年哈师大附中、东北师大附中、辽宁省实验中学联考高考英语一模试卷答案和解析【答案】1. D2. A3. A4. B5. C6. D7. C8. B 9. C 10. A 11. D 12. C 13. A 14. B15. B 16. G 17. F 18. A 19. D 20. E 21. B22. A 23. C 24. B 25. D 26. A 27. D 28. A29. C 30. B 31. B 32. D 33. A 34. D 35. C36. C 37. A 38. B 39. D 40. C41. published42. was announced43. how44. as45. a46. myself47. honestly48. writing49. and50. safety42.You must have heard about Dolly and have been amazed by the first cloned animal. But her e came a problem; should we clone humans? When being asked about this question, a l arge number of people which are interested in the topic hold the view that it's beneficial to cl one humans.Therefore, some other people, me including, are against this idea. Cl oning humans can bring negative effects and wrong informations. In the first place, they may not be treated equal as normal people, which I believe will make him suffer a lot. I n∧ second place, human cloning may lead in some social disorder, and it is quite dangero us.详解:1.came改为comes.考查时态.句意:但问题来了--我们该克隆人类么?文章的基础时态为一般现在时,且主语为a problem,谓语动词用第三人称单数,故came改为comes.2.去掉being.考查状语从句的省略.句意:当被问及这个问题时,很多对这个话题感兴趣的人认为克隆人类是有益的.在when引导的状语从句中,当主从句主语一致且含有be的某种形式时,从句的主语和be可以省略,本句中省略了they are,另外,此处也不是表示正在进行,being是多余的,故删掉being.3.which改为who/that.考查定语从句.句意参考上题解析,先行词为people,指人,关系词在从句中作主语,故which改为who /that.4.Therefore改为However.考查副词.句意:然而,其他一些人,包括我,反对这个想法.此处表示转折而非因果关系,故Therefore改为However.5.including改为included.考查非谓语动词.句意参考上题解析,me 和include之间是逻辑上的动宾关系,用过去分词表示被动,故including改为included.6.informations改为information.考查名词.句意:克隆人类会带来负面的影响和错误的信息.information是不可数名词,无复数形式,故informations改为information.7.equal改为equally.考查副词.句意:首先,他们可能不像正常人一样被平等对待,我相信这将使他们遭受很多.修饰动词treated用副词,故equal改为equally.8.him改为them.考查代词.句意参考上题解析,根据前面的they判断此处用them,故him改为them.9.in后加the.考查固定搭配.句意:其次,克隆人会导致社会紊乱.in the second place 表示"其次、第二点",故在in后加the.10.in改为to.考查固定短语.句意参考上题解析,lead to表示"导致",故in改为to.43. Dear Terry,I'm very happy to know that you are interested in our Chinese Summer Camp and I'd like to i ntroduce some details to you.(点明书信目的)The Chinese Summer Camp, lasting from July 15th to 28th, will welcome foreign student s from all over the world.【高分句型一】 With the theme of Culture and Communication, it aims to promote a better understand ing of Chinese culture. A variety of activities are designed to meet the enthusiasm of Chines e lovers, such as lectures on Chinese culture, visits to places of interest and communicatio n with Chinese students.【高分句型二】(暑期中文夏令营活动的时间,地点和安排)I am sure you will benefit a lot from the Summer Camp. Looking forward to your coming.(期盼到来)Yours,Li Hua【解析】1~3. (1)---(3)DAA(1).D.细节理解题.根据开始部分第二句 "Someone may call and say that they are from:•Immigration Canada"可知,如果自称是加拿大移民局的人打电话向你收钱,那么这可能是一个骗局,故D项正确.(2).A.细节理解题.根据倒数第九行"Embassies will not threaten you to make a payment or request an investigation fee due to a f ake (伪造的) passport."可知,大使馆不会要求你为假护照支付调查费用,故A项正确.(3).A.目标读者题.根据文章第一句话"The International Student Center has heard of several frauds(诈骗) that are targeting international students."可知,国际学生中心听说了针对国际学生的骗局,文章介绍了这些骗局的特点以及告诉国际学生如何警惕上当,由此可知本文的目标读者是国际学生,故A项正确.本文是一篇应用文,介绍了针对国际学生的骗局的特点以及告诉国际学生如何警惕上当受骗.新闻广告类材料是热门考题.其文句简练,信息量大,句式使用简单,表达方式多样,但阅读这类题目也是有规律可循的.1.品位广告、新闻的标题,预测其内容.阅读广告时,要注意广告中涉及的人物,物品,时间,数字,联系人及方式地址.阅读新闻时,要抓住新闻的特点即何时何处何人发生何事,其经过和结果怎样.2.要抓住书写广告的文体或图片,注意用大写、下划线等方式加以提示的文字.3.解题技巧①快速浏览广告、新闻,从标题中预测内容及涉及的类别.②浏览问题,寻找答案.注意地点和时间的多样化造成的误选.③复读材料,核实答案.4~7. 1.B.细节理解题.根据第三段中的"When anyone would hire her, Lisa put herself to work."可知,只要有人愿意雇用她,Lisa就会会努力工作,由此可知,Lisa最重视手头的工作,故B项正确.2.C.推理判断题.根据第三段中的"When the dimes (一角硬币) added up to dollars, she lost her taste for sweets."可知,当钱一分一分地积少成多时,她对甜食也失去了兴趣,由此可知,Lisa只想着不停地存钱,失去了对甜食的欲望,故C项正确.3.D.文章结构题.通读全文可知,文章是通过对比Lisa和Helen对工作、婚姻以及生活的态度而展开的,故D项正确.4.C.主旨大意题.通读全文可知,本文讲述了Lisa和Helen姐妹俩有着完全不同的生活态度以及她们的生活状况,一个及时享乐,最后生活窘迫,一个拼命存钱,却忘了享受生活,故C项(贫穷还是富有?)最能概括出文章内容.结合选项,故选C.本文是一篇记叙文,讲述了Lisa和Helen姐妹俩对生活有着完全不同的两种态度以及她们的生活状况.做这类题材阅读理解时要求考生对文章通读一遍,做题时结合原文和题目有针对性的找出相关语句进行仔细分析,结合选项选出正确答案.推理判断题也是要在抓住关键句子的基础上合理的分析才能得出正确答案,切忌胡乱猜测,一定要做到有理有据.8~11. 1.B.推理判断题.根据第一段中的"The best explanation was that his vehicle created an "igloo (snow house) effect" and prot ected him from the extremely low temperatures and that his body would hibernate(冬眠) during this time."可知, Peter Skyllberg被困在车里两个月,在低温、没有食物和水的情况下奇迹存活的原因是他的车创造了一种雪屋效应并保护他免受极低的温度,文章提到这个例子就是为了引出科学家发现体温的变化不会对健康造成损害以及降体温疗法应用于医学上这一话题,故B项正确.2.C.细节理解题.根据第三段中的"The team found the change in body temperature caused no harm to the health of the mice."可知,王宏的研究小组发现体温的变化不会对白鼠的健康造成损害,故C项正确.3.A.细节理解题.根据最后一段中的"Dutch doctors are now using low temperatures for patients who have suffered brain injuries i n accidents,"可知,荷兰的科学家正在用降体温疗法治疗在事故中脑损伤患者,由此可知,降体温技术可以使脑损伤得到适当地治疗,故A项正确.4.D.文章出处题.通读全文可知,本文主要介绍了科学家发现体温的变化不会对白鼠的健康造成损害,而且目前降体温疗法已经应用于医学上治疗脑损伤,属于医学范畴,最有可能出自医学杂志,故D项正确.本文是一篇说明文,介绍了科学家发现体温的变化不会对白鼠的健康造成损害,而且目前降体温疗法已经应用于医学上治疗脑损伤.文章出处题需要根据文章内容判断文章来源,通读全文可知,本文主要介绍了科学家发现体温的变化不会对白鼠的健康造成损害,而且目前降体温疗法已经应用于医学上治疗脑损伤,这属于医学范畴,最有可能出自医学杂志.12~15. 1.C.细节理解题.根据第二段中的"There have been the usual doubts about the intention behind,"可知,一些对一带一路战略持消极态度的国家主要是怀疑其背后的目的,故C项正确.2.A.词义猜测题.根据画线词前的"To some of them, it is a vague assumption that investments from China are potential "debt traps"that call for extreme caution or "threats to national security"."可知,对其中一些国家来说,有一种假设是来自中国的投资是潜在的债务陷阱,需要极度谨慎,这就是为什么涉及中国企业的互利商业组合遭遇挫折的原因,由此可知画线词词义为"遭遇挫折、未能成功",故A项正确.3.B.推理判断题.根据第三段中的"Likewise, the European Union has agreed on a framework regulating foreign investment (投资), particularly those from China. on the same account."可知,出于同样的原因,欧盟已就监管外国投资,尤其是来自中国的投资的框架达成一致,由此可知,欧盟将对中国的投资采取相对严格的措施,故B项正确.4.B.观点态度题.根据倒数第二段中的"It was a timely reminder."可知,葡萄牙总理建议欧盟避免走保护主义的道路,作者认为这个建议是一个及时的提醒,由此可知,作者对葡萄牙总理的建议是支持的,故B项正确.本文是一篇说明文,介绍了一些国家对一带一路战略持消极态度,采取保护主义政策,但是中国和一带一路沿线国家坚信一带一路战略是实现共同发展、维护世界和平稳定的必由之路.考察学生的细节理解和推理判断能力,做细节理解题时一定要找到文章中的原句,和题干进行比较,再做出正确的选择.在做推理判断题不要以个人的主观想象代替文章的事实,要根据文章事实进行合乎逻辑的推理判断.16~20. GFADE1.G.承上启下题.上文说很多人在不知道如何建立一个健康的日常习惯的情况下就开始跑步,下文又说避免以下几个误区来增加你跑步成功的机会,此处需要一个承上启下的过渡句,故G项(很多人会犯一些常见的错误,这可能会影响训练或导致受伤)符合语境.故选G.2.F.联系上文题.根据本空前的"Runners need to ease into the sport before increasing the distance"可知,在增加距离之前,跑步者需要放松地投入这项运动,此处是说这样做的好处,故F项:It will help reduce the risk of injury, so you can continue with your new running routine(它将有助于减少受伤的风险,所以你可以继续你的常规跑步)符合语境.故选F.3.A.段落理解题.根据本段内容,特别是"Follow a training plan that includes rest days."可知,要安排几天休息时间,本段讲的是一个误区是坚持每天都跑步而不安排休息时间,故A项:Not taking rest days(不休息)符合语境.故选A.4.D.文章衔接题.根据本空后的"especially for beginners whose muscles and bones haven't yet been conditioned for such int ense exercise."可知,特别是对于那些肌肉和骨骼还没有适应这项运动的初跑者,此处是说跑步是很有难度的,故D项:Running is a demanding activity which can be really hard on your body(跑步是一项要求很高的运动,对你的身体来说真的很难)符合语境.故选D.5.E.理解判断题.根据本段小标题"Comparing yourself to others"可知,跑步的一个误区是拿自己和别人比较,此处讲的还是关于和他人比较的话题,故E项(刚开始的时候,很难不把自己与别人比较)符合语境.故选E.本文是一篇说明文,文章主要介绍了跑步需要避免的几个误区:1、做得太多太快了;2、不休息;3、把自己和别人比较.根据段落小标题判断正确答案是七选五解题的常用方法之一,需要把小标题和选项中的关键词紧密结合起来,例如本篇第5题,E项中的"compare yourself to others"与本段小标题"Comparing yourself to others"一致,将E项带入文中逻辑正好通顺,空后的"reading running blogs, magazines and message boards"是与他人比较的几个表现.21~40. 1-5 BACBD 6-10 ADAC B 11-15 BDADC 16-20 CABDC1.B.考查形容词及语境理解.A. afraid害怕的;B. aware知道的;C. fond喜欢的;D. ashamed羞愧的.根据本空后的"until I actually got to Greece"可知,直到我到了希腊我才知道那里的难民灾难的规模有多大,故B项正确.2.A.考查动词短语及语境理解.A. took over接管、接任;B. made for前往;C. came up 发生;D. figured out想出.根据本空后的"as manager of the Oinofyta Camp."可知,我接任奥诺费塔营经理的工作,故A项正确.3.C.考查名词及语境理解.A. teacher老师;B. volunteer志愿者;C. mother母亲;D. lawyer律师.根据下文中的"which was to take care of them"可知,这个工作需要照顾他人,因此工作性质像母亲一样,故C项正确.4.B.考查名词及语境理解.A. failure失败;B. goal目标;C. moment时刻;D. problem 问题.根据本空后的"which was to take care of them and show them that they were loved and cared about"可知,我工作的目标是照顾难民,让他们感觉到自己是被爱和关心着的,故B项正确.5.D.考查动词及语境理解.A. forced强迫;B. sheltered庇护;C. cured治愈;D. forgotten 忘记.让他们感觉到自己是被爱和关心着的,并没有被遗忘,故D项正确.6.A.考查动词及语境理解.A. overcrowded过度拥挤;B. abandoned放弃;C. observed 观察;D. involved涉及.上文说希腊正遭受难民灾难,大批的难民涌入,肯定极度拥挤,故A项正确.7.D.考查动词及语境理解.A. employ雇佣;B. train训练;C. examine检查;D. serve 为……服务.根据上文可知,我去希腊是为难民服务的,我的难民营可以为500人服务,故D项正确.8.A.考查名词及语境理解.A. dignity尊严;B. pay付款;C. demand要求;D. value 价值.根据本空前的"When your life is spent getting handouts from everyone all day,"可知,当你的生活每天都在接受别人的救济时,你就会失去尊严,故A项正确.9.C.考查形容词及语境理解.A. strange奇怪的;B. ordinary平常的;C. wild狂热的、疯狂的;D. peaceful平静的.根据本空后的"idea that it would be great to start a business, sewing bags from leftover ___10___ materi al."可知,我有一个想法--用剩余的帐篷材料来缝制袋子,在这样困难的条件下还能想到创业想法,这是近乎疯狂的,故C项正确.10.B.考查名词及语境理解.A. cooking烹饪;B. tent帐篷;C. heating加热;D. wood 木头.根据常识可知,用来缝制袋子的应该是帐篷材料,故B项正确.11.B.考查形容词及语境理解.A. saddest伤心的;B. happiest快乐的;C. bravest 勇敢的;D. calmest冷静的.根据本空后的"people in the camp because they had a purpose."可知,因为生活有了奔头,所以他们成了难民营里最快乐的人,故B项正确.12.D.考查名词及语境理解.A. leaders领导人;B. consultants顾问;C. workers 工人;D. purchasers购买者、买家.根据本空后的"in America who want to buy these bags now."可知,我们在美国有一些想买这些袋子的买家,故D项正确.13.A.考查名词及语境理解.A. goodbye再见;B. thanks感谢;C. sorry对不起;D. hello你好.根据本空后的"has been one of the harder things here at the camp"可知,道别是在难民营最难的事情之一,故A项正确.14.D.考查名词及语境理解.A. fighting斗争;B. checking检查;C. working工作;D. changing改变.根据上文内容可知,从靠别人救济生活到缝制袋子赚钱是难民的巨大改变,故D项正确.15.C.考查名词及语境理解.A. anniversary周年纪念日;B. party聚会;C. reunion 重聚;D. celebration庆祝.根据本空前的。
2019 年东北三省三校(哈尔滨师大附中、东北师大附中、 辽宁)高考模拟试卷及答案
22,23 题为选考题.)
17.(12 分)设函数 f(x)=sin(2x﹣ )+2cos2x.
(Ⅰ)当 x∈[0, ]时,求函数 f(x)的值域;
(Ⅱ)△ABC 的内角 A,B,C 所对的边分别为 a,b,c,且 f(A)= ,a= ,b=2,
求△ABC 的面积.
18.(12 分)世界卫生组织的最新研究报告显示,目前中国近视患者人数多达 6 亿,高中生
和大学生的近视率均已超过七成,为了研究每周累计户外暴露时间(单位:小时)与近
视发病率的关系,对某中学一年级 200 名学生进行不记名问卷调查,得到如下数据:
每周累计户外暴露时间 [0,7) [7,14) [14,21) [21,28) 不少于 28
(单位:小时)
小时
近视人数
21
39
37
2
1
不近视人数
A.{x|﹣1≤x≤2} B.{x|0<x≤2}
C.{x|1≤x≤2}
D.{x|x≤﹣1 或 x>
2}
3.(5 分)已知向量 , 的夹角为 60°,| |=1,| |=2,则|3 + |=( )
A.
B.
C.
D.
4.(5 分)设直线 y=x﹣ 与圆 O:x2+y2=a2 相交于 A,B 两点,且|AB|=2 ,则圆 O
C.a≤e
D.a
二、填空题(本题共 4 小题,每小题 5 分,共 20 分)
13.(5 分)已知 x,y 满足约束条件:
,则 z=2x+y 的最大值是
.
14.(5 分)甲、乙、丙三人中,只有一个会弹钢琴.甲说:“我会”,乙说:“我不会”,丙
说:“甲不会”.如果这三句话只有一句是真的,那么会弹钢琴的是
高中化学考点21 氯水的性质探究(解析版)
考点21 氯水的性质探究1.(2018北京)下列实验中的颜色变化,与氧化还原反应无关的是A B C D实验NaOH溶液滴入FeSO4溶液中石蕊溶液滴入氯水中Na2S溶液滴入AgCl浊液中热铜丝插入稀硝酸中现象产生白色沉淀,随后变为红褐色溶液变红,随后迅速褪色沉淀由白色逐渐变为黑色产生无色气体,随后变为红棕色【答案】C【解析】A项,NaOH溶液滴入FeSO4溶液中产生白色Fe(OH)2沉淀,白色沉淀变为红褐色沉淀时的反应为4Fe(OH)2+O2+2H2O=4Fe(OH)3,该反应前后元素化合价有升降,为氧化还原反应;B项,氯水中存在反应Cl2+H2O HCl+HClO,由于氯水呈酸性,石蕊溶液滴入后溶液先变红,红色褪色是HClO 表现强氧化性,与有色物质发生氧化还原反应;C项,白色沉淀变为黑色时的反应为2AgCl+Na2S=Ag2S+2NaCl,反应前后元素化合价不变,不是氧化还原反应;D项,Cu与稀HNO3反应生成Cu(NO3)2、NO气体和H2O,气体由无色变为红棕色时的反应为2NO+O2=2NO2,反应前后元素化合价有升降,为氧化还原反应;与氧化还原反应无关的是C项,答案选C。
氯水成分的复杂性和多样性1.反应原理及成分(三分四离:三种分子和四种离子)Cl2+H2O HCl+HClOHCl=H++Cl-HClO H++ClO-2HClO 2HCl+O2↑H2O H++OH-新制氯水中,主要存在的分子有三种:Cl2、H2O、HClO;离子有四种:H+、Cl-、ClO-、OH-。
2.氯水的性质氯水在与不同物质发生反应时,表现出成分的复杂性和氯水性质的多样性。
成分 表现的性质 反应实例Cl — 沉淀反应 Ag ++ Cl —=AgCl↓H + 强酸性 CaCO 3+2H +=Ca 2+CO 2↑+H 2O 滴入紫色石蕊试液先变红,后褪色HClO①弱酸性 ②强氧化性 HClO+ OH —= ClO —+ H 2O 漂白、杀菌、消毒 Cl 2①强氧化性②呈黄绿色 ③加成反应Cl 2+2KI=2KCl+I 2Cl 2+SO 2+2 H 2O =2HCl+H 2SO 4 Cl 2+CH 2=CH 2 → CH 2Cl —CH 2ClH 2O无水CuSO 4粉末变蓝 CuSO 4+5H 2O= CuSO 4·5H 2O提示:(1)氯水通常密封保存于棕色试剂瓶中(见光或受热易分解的物质均保存在棕色试剂瓶中); (2)Cl 2使湿润的蓝色石蕊试纸先变红,后褪为白色。
三省三校(黑龙江省哈师大附中、东北师大附中、辽宁省实验中学)2023届高三下期第一次联合模拟数学试题
哈尔滨师大附中东北师大附中2023年高三第一次联合模拟考试数学辽宁省实验中学注意事项:1.答卷前,考生务必将自己的姓名、准考证号填写在答题卡上.2.回答选择题时,选出每小题答案后,用铅笔把答题卡上对应题目的答案标号涂黑.如需改动,用橡皮擦干净后,再选涂其他答案标号.回答非选择题时,将答案写在答题卡上,写在本试卷上无效.3.考试结束后,将本试卷和答题卡一并交回.第Ⅰ卷(选择题共60分)一、选择题(本大题共8小题,每小题5分,共40分.在每小题给出的四个选项中,只有一项符合题目要求的)1.已知集合A =x ∈Z x 2-x -2≤0 ,集合B =x y =1-log 2x ,则A ∩B =()A .-1,2B .1,2C .1,2D .-1,1,22.已知i 为虚数单位,复数z 满足z -3+2i =1,则复数z 对应的点在()A .第一象限B .第二象限C .第三象限D .第四象限3.已知向量非零a 、b满足a+2b⊥a-2b ,且向量b在向量a方向的投影向量是14a,则向量a与b的夹角是()A .π6B .π3C .π2D .2π34.杨辉是我国古代数学史上一位著述丰富的数学家.著有《详解九章算法》、《日用算法》和《杨辉算法》.杨辉三角的发现要比欧洲早500年左右,由此可见我国古代数学的成就是非常值得中华民族自豪的.杨辉三角本身包含了很多有趣的性质,利用这些性质,可以解决很多数学问题,如开方、数列等.我们借助杨辉三角可以得到以下两个数列的和.1+1+1+⋯+1=n ;1+2+3+⋯+C 1n -1=C 2n .若杨辉三角中第三斜行的数:1,3,6,10,15,⋯构成数列a n ,则关于数列a n 叙述正确的是()A .a n +a n +1=n +1 2B .a n +a n +1=n 2C .数列a n 的前n 项和为C 3nD .数列a n 的前n 项和为C 2n +15.若sin 2α+π6+cos2α=3,则tan α=()A .33B .1C .2-3D .2+36.“阿基米德多面体”也称为半正多面体(semi -regularsolid ),是由边数不全相同的正多边形为面围成的多面体,它体现了数学的对称美.如图所示,将正方体沿交于一顶点的三条棱的中点截去一个三棱锥,共可截去八个三棱锥,得到八个面为正三角形、六个面为正方形的一种半正多面体.已知AB =322,则该半正多面体外接球的表面积为()A .18πB .16πC .14πD .12π7.某学校在校门口建造一个花圃,花圃分为9个区域(如图),现要在每个区域栽种一种不同颜色的花,其中红色、白色两种花被随机地分别种植在不同的小三角形区域,则它们在不相邻(没有公共边)区域的概率为()A .18B .14C .38D .348.已知函数f x =x +1 ln x ,x >0kx -ln -x +k ,x <0,若关于x 的方程f -x =-f x 有且仅有四个相异实根,则实数k 的取值范围为()A .0,1e -1 B .1,+∞C .0,1e -1∪1,+∞ D .0,1 ∪1,+∞二、选择题(本大题共4小题,每小题5分,共20分,在每小题给出的选项中,有多项符合题目要求.全部选对的得5分,部分选对的得2分,有选错的得0分)9.函数f x =A sin ωx +φ (其中A ,ω,φ是常数,A >0,ω>0,-π2<φ<π2)的部分图象如图所示,则下列说法正确的是()A .f x 的值域为-2,2B .f x 的最小正周期为πC .φ=π6D .将函数f x 的图象向左平移π6个单位,得到函数g x =2cos2x 的图象10.抛物线有如下光学性质:由其焦点射出的光线经抛物线反射后,沿平行于抛物线对称轴的方向射出;反之,平行于抛物线对称轴的入射光线经抛物线反射后必过抛物线的焦点.已知抛物线C :y 2=8x ,O 为坐标原点,一条平行于x 轴的光线l 1从点M 5,2 射入,经过C 上的点P 反射,再经过C 上另一点Q 反射后,沿直线l 2射出,经过点N .下列说法正确的是()A .PQ =8B .若延长PO 交直线x =-2于D ,则点D 在直线l 2上C .MQ 平分∠PQND .抛物线C 在点P 处的切线分别与直线l 1、FP 所成角相等11.已知实数a ,b 满足a 2-ab +b =0a >1 ,下列结论中正确的是()A .b >aB .b ≥4C .1a +1b>1D .e b +1e a +2a >e a+1e b+2b 12.已知异面直线a 与直线b ,所成角为60°,平面α与平面β所成的二面角为80°,直线a 与平面α所成的角为15°,点P 为平面α、β外一定点,则下列结论正确的是()A .过点P 且与直线a 、b 所成角均为30°的直线有3条B .过点P 且与平面α、β所成角都是30°的直线有4条C .过点P 作与平面α成55°角的直线,可以作无数条D .过点P 作与平面α成55°角,且与直线a 成60°的直线,可以作3条第Ⅱ卷(非选择题共90分)三、填空题(本大题共4小题,每小题5分,共20分)13.2x -y 6的二项展开式中x 2y 4的系数是______.(用数字作答)14.若f x =a +1e x -1+1为奇函数,则实数a =______.15.已知圆C :x -1 2+y -4 2=4,直线y =kx +1交圆C 于M 、N 两点,若△CMN 的面积为2,则实数k 的值为______.16.已知椭圆C :x 2a 2+y 2b2=1a >b >0 的左、右焦点分别为F 1、F 2,点A 、B 在椭圆C 上,满足AF 2 ⋅F 1F 2 =0,AF 1 =λF 1B ,若椭圆C 的离心率e ∈33,22,则实数λ取值范围为______.四、解答题(本大题共6小题,共70分.解答应写出文字说明、证明过程和演算步骤)17.(本小题满分10分)在△ABC 中,内角A ,B ,C 的对边分别为a ,b ,c .从下面①②③中选取两个作为条件,证明另外一个成立.①a 2-c 2=bc ;②b +b cos A =3a sin B ;③sin A =3sin C .注:若选择不同的组合分别解答,则按第一个解答计分.18.(本小题满分12分)已知等差数列a n 的首项a 1=1,记a n 的前n 项和为S n ,S 4-2a 2a 3+14=0.(1)求数列a n 的通项公式;(2)若数列a n 公差d >1,令c n =a n +2a n ⋅a n +1⋅2n ,求数列c n 的前n 项和T n .19.(本小题满分12分)如图,在四棱锥P -ABCD 中,底面ABCD 为菱形,AC ⊥PE ,PA =PD ,E 为棱AB 的中点.(1)证明:平面PAD ⊥平面ABCD ;(2)若PA =AD ,∠BAD =60°,求二面角E -PD -A 的正弦值.20.(本小题满分12分)某学校号召学生参加“每天锻炼1小时”活动,为了了解学生参与活动的情况,随机调查了100名学生一个月(30天)完成锻炼活动的天数,制成如下频数分布表:天数0,55,10 10,15 15,20 20,25 25,30人数4153331116(1)由频数分布表可以认为,学生参加体育锻炼天数X 近似服从正态分布N μ,σ2 ,其中μ近似为样本的平均数(每组数据取区间的中间值),且σ≈6.1,若全校有3000名学生,求参加“每天锻炼1小时”活动超过21天的人数(精确到1);(2)调查数据表明,参加“每天锻炼1小时”活动的天数在15,30 的学生中有30名男生,天数在0,15 的学生中有20名男生.学校对当月参加“每天锻炼1小时”活动超过15天的学生授予“运动达人”称号.请填写下面列联表性别活动天数合计0,1515,30男生女生合计并依据小概率值α=0.05的独立性检验,能否认为学生性别与获得“运动达人”称号有关联.如果结论是有关联,请解释它们之间如何相互影响.附:参考数据:Pμ-σ≤X≤μ+σ≈0.6827;Pμ-2σ≤X≤μ+2σ≈0.9545;Pμ-3σ≤X≤μ+3σ≈0.9973.χ2=n ad-bc2a+bc+da+cb+dn=a+b+c+dα0.10.050.010.0050.001xα 2.706 3.841 6.6357.87910.828 21.(本小题满分12分)已知双曲线C:x2a2-y2b2=1a>0,b>0过点A3,-2,且渐近线方程为x±3y=0.(1)求双曲线C的方程;(2)如图,过点B1,0的直线l交双曲线C于点M、N,直线MA、NA分别交直线x=1于点P、Q,求PBBQ的值.22.(本小题满分12分)已知函数f x =a2e2x+a-2e x-x22,f x 为函数f x 的导函数.(1)讨论f x 的单调性;(2)若x1,x2x1<x2为f x 的极值点,证明:x2-x1<ln3-a-ln a+2a-1.哈师大附中一模数学参考答案第一部分:选择题题号123456789101112答案CABA CADDABBDABDBC三、填空题:13.6014.115.-7或116.3,5四、解答题17.(本小题满分10分)解:选①②作条件,③做结论由②,得:sin B +sin B cos A =3sin A sin B ⇒sin A -π6 =12所以,A =π3,则a 2=b 2+c 2-bc ,a 2=c 2+bc ,所以a =3c ,即:sin A =3sin C .选①③作条件,②做结论由③,得:a =3c ,a 2=c 2+bc ,则b =2c所以,A =π3,B =π2,C =π6所以b +b cos A =2c +c =33c =3a sin B .选②③作条件,①做结论由②,得:sin B +sin B cos A =3sin A sin B ⇒sin A -π6 =12,所以,A =π3,由③,得:C =π6,则a =3c ,b =2c ,即:a 2-c 2=bc .18.(本小题满分12分)解:(1)S 4-2a 2a 3+14=4a 1+6d -2d +a 1 2d +a 1 +14=0则d =±2所以,a n =2n -1或a n =-2n +3.(2)由(1)可得,a n =2n -1,c n =2n +32n -1 2n +1 ⋅2n =12n -1 ⋅2n -1-12n +1 ⋅2nT n =c 1+c 2+c 3+⋯c n =1-13⋅21+13⋅21-15⋅22 +⋯+12n -1 ⋅2n -1-12n +1 ⋅2n所以,T n =1-12n +1 ⋅2n .19.(本小题满分12分)(1)证明:取AD 的中点O ,连接OP ,OBAC ⊥BD BD ∥OE ⇒AC ⊥OE AC ⊥PE OE ∩PE =E⇒AC ⊥平面PDE ,所以AC ⊥PDAC ⊥PD AD ⊥PD AC ∩AD =D ⇒PD ⊥平面ABCD PD ⊂平面PAD⇒PD ⊥平面ABCD ⊥平面ABCD(2)由(1)得,建立如图所示空间直角坐标系O -xyz设AD =2,则P 0,0,3 ,E 12,32,0,D -1,0,0设平面PDE 的法向量n=x ,y ,z ,则n ⋅DP =0n ⋅DE =0⇒x +3z =032x +32y =0,取x =3,则y =-3,z =-1所以,n =3,-3,-1 取平面PDA 的法向量m =0,1,0 ,则cos n ,m =n ⋅m n m=-313所以,二面角E -PD -A 的正弦值为21313.20.(本小题满分12分)(1)μ=4×2.5+15×7.5+33×12.5+31×17.5+11×22.5+6×27.8100=14.9则X -N 14.9,6.1所以,P X >21 =P X >14.9+6.1 =1-0.68272=0.15865所以3000人中锻炼超过21天人数约为476人.(2)性别活动天数合计0,1515,30男生203050女生321850合计5248100(2)零假设为H 0:学生性别与获得“运动达人”称号无关χ2=100×30×32-20×18 250×50×52×48≈5.77>3.841依据α=0.05的独立性检验,我们推断H 0不成立,即:可以认为学生性别与获得“运动达人”称号有关;而且此推断犯错误的概率不大于0.05.根据列联表中的数据计算男生、女生中活动天数超过15天的频率分别为:3050=0.6和1850=0.36,可见男生中获得“运动达人”称号的频率是女生中获得“运动达人”的称号频率的0.60.36≈1.67倍,于是依据频率稳定与概率的原理,我们可以认为男生获得“运动达人”的概率大于女生,即:男生更容易获得运动达人称号.21.(本小题满分12分)(1)双曲线方程为:x 23-y 2=1(2)法一:①当直线MN 与轴垂直时M -3,0 ,N 3,0 ,A 3,-2直线AM :y =-23+3x +3 ,令x =1⇒y P =-23同理,y Q =23⇒y P +y Q =0②当直线MN 不与轴垂直时设M x 1,y 1 ,N x 2,y 2 ,直线MN :x =ty +1代入到x 2-3y 2=3中得t 2-3 y 2+2ty -2=0∴y 1+y 2=-2t t 2-3y 1y 2=-2t 2-3Δ>0又∵直线AM :y +2=y 1+2x 1-3x -3 ,令x =1⇒y P=-2⋅y 1+2ty 1-2-2=-2t +2 y 1ty 1-2同理,y Q =-2t +2 y 2ty 2-2∴y P +y Q =-2t +2 2ty 1y 2-2y 1+y 2 t 2y 1y 2-2t y 1+y 2 +4=0综上,y P +y Q =0∴PBBQ=1法二:设直线MN 的方程为y =k x -1 ,M x 1,y 1 N x 2,y 2 ,联立y =k x -1 x 2-3y 2-3=0⇒3k 2-1 x 2-6k 2x +3k 2+3=0 x 1+x 2=6k 23k 2-1x 1⋅x 2=3k 2+33k 2-1Δ=121-2k 2 >0所以,AM 的方程:y +2=y 1+2x 1-3x -3 ⇒y P =-2-2y 1+2x 1-3=-2-2k +2+2kx 1-3 =-2+2k 2x 1-3+1 同理:y Q =-2+2k 2x 2-3+1 所以,y Py Q =x 1x 2-x 1+x 2 +3-2x 1x 1x 2-3x 1+x 2 +3+2x 1 =3k 2+1 -6k 2+3k 2-1 3-2x 1 3k 2+1 -18k 2+3k 2-1 3+2x 1=6k 2-2x 13k 2-1-6k 2+2x 13k 2-1=122.(本小题满分12分)(1)设g x =f x =ae 2x +a -2 e x -x ,则g x =e x +1 ae x -1 ①当a ≤0时,f x 的增区间-∞,+∞ ②当a >0时,f x 的增区间ln1a ,+∞ ;减区间-∞,ln 1a;(2)若f x 有两个极值点,则f x 有两个变号零点,由(1)知a >0fxmin=f -ln a =1-1a -ln 1a<0 设u x =1-x -ln x x >0 ,则u x =-1-1x<0,所以u x 在0,+∞ 上递减,又u 1 =0所以,当x >1时,u x <0,所以1a>1,即0<a <1设h x =x -1-ln x x >0 ,则h x =1-1x =x -1x令h x >0⇒x >1,令h x <0⇒0<x <1,所以h x 在0,1 递减,在1,+∞ 递增,所以h x ≥h 1 =0∵f ln 3a -1=a 3a -1 2+a -2 3a -1 -ln 3a -1 =3a -1 -ln 3a -1 >0且ln 3a -1 >ln1a∴f x 在ln 1a ,ln 3a -1 上存在唯一一个零点x 2,即ln 1a <x 2<ln 3a-1 所以只需证f 1-2a >0且1-2a <ln1a当x <ln 1a 时,0<e x <1a ∴a -2 e x >a -2a ∴f 1-2a >0+a -2a -1-2a =0又∵1-2a <1-1a <ln 1a ∴1-2a <x 1<ln 1a <x 2<ln 3a -1 ∴x 2-x 1<ln 3a -1 -1-2a。
东北三省三校2019年高三第一次联合真题模拟考试英语(答案)
哈尔滨师大附中东北师大附中辽宁省实验中学2019年高三第一次联合模拟考试英语试卷本试卷分第I卷(选择题)和第II卷(非选择题)两部分.考试结束,将本试卷和答题卡一并交回.满分150分,考试时间120分钟.第I卷第一部分听力(共两节,满分30分)第一节(共5小题;每小题1.5分,满分7.5分)听下面5段对话.每段对话后有一个小题,从题所给的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. Which place does the woman want to visit?A. A bank.B. A shopping mall.C. Wall Street.2. What is the man going to do?A. Go shopping.B. Prepare a meal.C. Bake some cookies.3. Why did the man want someone to come up to his apartment?A. He needed an electrician.B. The water was running.C. The air conditioner doesn’t work.4. What is the woman doing?A. Listening to the radio.B. Turning off the radio.C. Doing her homework.5. What are the speakers mainly talking about?A. Marriage.B. Shopping.C. Chairs.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.每段对话后有几个小题,从题所给的A,B,C三个选项中选出最佳选项,并标在试卷的相应位置.听每段对话前,你将有时间阅读各个小题,每小题5秒钟;听完后,各个小题将给出5秒钟的作答时间.听第6段材料,回答第6至7题.6. What do the man’s parents want him to be in the future?A. A soldier.B. A doctor.C. A journalist.7. What does the woman like the most?A. Writing.B. Working.C. Traveling.听第7段材料,回答第8至9题.8. What are the speakers doing?A. Looking for a rental house.B. Planning to buy a house.C. Watching the ads on TV.9. What do we know about the house in the ad?A. It is well-furnished.B. It is far from the man’s company.C. It has a yard and a garage.听第8段材料,回答第10至12题.10. According to the woman, what happened to her jarket?A. She lost it.B. It became smaller.C. She bought a new one.11. What did the woman do two weeks ago?A. She went to a used clothing store.B. She saw a movie.C. She bought a jacket.12. How does the woman probably feel in the end?A. Apologetic.B. Angry.C. Happy.听第9段材料,回答第13至16题.13. What is the relationship between the speakers?A. Classmates.B. Teacher and student.C. Coach and player.14. How did the man react when he saw the woman dancing?A. Annoyed.B. Inspired.C. Surprised.15. What does the man prefer doing for exercise?A. Riding a bicycle.B. Playing soccer.C. Running.16. What will the speakers do next?A. Study for a tese.B. Go to the gym together.C. Show each other their moves. 听第10段材料,回答第17至20题.17. What does Brad have to do before he has breakfast?A. Clean his sleeping place.B. Go down to the stream to get some water.C. Feed some animals.18. What happened to Brad when he went fishing?A. A tree branch fell on him.B. He lost his fishing pole.C. He slipped and lost one of his shoes.19. What was Brad doing when he got lost in the forest?A. Running away from a bear.B. Searching for wood.C. Wandering around looking for the cabin.20. How did Brad like summer camp?A. He had a great time.B. It was okay.C. He didn’t have fun.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)阅读下面短文,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.21. Which part may be the last choice for travelling in August?A. Asia.B. Africa.C. Southern Europe.D. South America.22. Besides climate, _____ can contribute to your disappointment when traveling.A. hotel pricesB. peaceful environmentC. transportation expensesD. troublesome holidaymakers23. What does the underlined word “invade” in the part “In Europe” mean?A. Immigrate to.B. Visit separately.C. Enter in large numbers.D. Attack and occupy.BLet me tell you about my relationship with the school desk. From my first day at Penny Camp Elementary School in 1982, it was terrible. This is how it went down: five seconds into class, the foot start bouncing; 10 seconds in, both feet; 15 seconds, I burst out the drums ! After a few minutes, it’s all over. I’m trying to put my leg behind my neck. No, that desk and I didn’t get along.Sitting still was hard enough, but I also struggled with reading. Reading out loud in class was a special kind of hell (地狱). By the third grade I had progressed from being one of “those kids” to being the “special kid”. I was found to have multiple language-based learning disabilities and attention deficit disorder (A.D.D) (注意力缺陷障碍症). I was turned into a “patient” w ho needed treatment rather than a human being with differences. I struggled with severe anxiety and depression at age 10.I survived this time in my life because of my mom. She knew in her heart that her childwasn’t broken and didn’t need to be fixed. My mom was right. When I think back on my school experience. I realize it wasn’t the A.D.D. that disabled me. What disabled me were limitations not in myself but in the environment. I’ve come to believe that I did not have a disability, as it is common to say, but experienced disability in environments that could not accommodate and accept my differences.In the fall of 1977,after two years at Loyola Marymount University, where my learning differences were fully accommodated, I transferred to(转学)Brown University, where I graduated with an honors degree in English literature. I still can’t spell or sit still, but I now use support and technology to relieve my weakness and build a life on my strengths. I don’t feel stupid anymore and I know that I—and others like me—can live good lives despite these challenges.24. What does the author want to tell us in the first paragraph?A. He didn’t like to study.B. He used to be active at school.C. He suffered from a broken desk.D. He had trouble sitting still in class.25. How did the author probably feel in class in his early school years?A. Exited.B. Uneasy.C. Interested.D. Bored.26. Which of the following is correct according to the last paragraph?A. He is living a good life with his weakness.B. His disability has been cured by technology.C. He got his honors degree in English literature in the fall of 1997.D. He was transferred to Brown University because of his disability.27. From the passage we learn that__________.A. a disability is nothing but a differenceB. family’s support is the most importantC. disabled people can’t live well however hard they workD. sometimes limitations of the environment disable a personCIt’s the oldest trick in the book: threaten the kids with a piece of coal, and they’ll behave in the name of Santa Claus. Some people say that parents are purposely taking in their kids by lying to them about Santa. Is it purposely cheating or playing along with the fantasy? There are always those stories about the kindergarten t eacher or parent who would tell the kids there’s no Santa Claus, and they’d all start crying on the lost dreams. But if another teacher goes into a third-grade class and says there is a Santa Claus, they’ll all laugh at her.What I say is that if they’re a t the age when they’re still believing, why bother to end it?Then how long should parents pretend? Studies indicate that after eight, 75 percent of kids don’t believe.That’s the first “S” word that parents have to deal with—it’s not sex. It’s Santa. So t he parent has to sit down and say it in a gentle way. “Listen, Santa did exist. He was a person who gave to others and now that you’re older, you can give to others and be Santa,too.”Do you think if a kid who believes in Santa walks into a third-or-fourth-grade class, his friends are going to tell him in a gentle way? No. They’re going to make fun of him, and the kid is going to run home crying , saying you lied to him. We all remember how the news is broken to us, so if we all remember, then there’s some significance or we would have forgotten it. And it’s better to have a memory if someone doing it nicely than some kids laughing at you.Santa is also used as an instrument of guilt, because Santa knows everything. So even if thekids did bad things and got away with them, Santa knew. Still. Santa alone is not a good behavioral tool. You can’t, in, say, January, play the Santa card to your child—because Christmas is too far away.28. According to the first paragraph, parents should__________.A. telling the kids that Santa does not existB. lie to their children on the problem of Santa ClausC. not tell the truth if their children believe Santa Claus existsD. tell children in advance in case of being laughed at by classmates29. Why could your kid possibly be made fun of in the fourth grade?A. He tells a lie that he believes in Santa.B. He says Santa does exist in this world.C. He expects gentle talks from his friends.D. He gives to others and acts as Santa does.30. The underlined part in the last paragraph most probably means to__________.A. play cards with children happilyB. talk the kids out of doing something badC. clarify the truth of Santa to the kids in a gentle wayD. let the children figure the problem out by themselves31. The author’s intention in writing this text is to__________.A. introduce the detailed story of Santa Claus in all aspectsB. prevent children from being laughed at by fellow classmatesC. help children to understand whether Santa Claus is real or notD. instruct parents how to explain the existence of Santa Claus to kidsDOumuamua, an object through space that was discovered on October 19th, has already made history. The speed at which it is moving relative to the sun means that it cannot be native to the solar system. Its official name is thus II/2017 UI, with the “I” standing for “interstellar (星际)”—the first time this name has ever been used.That is exciting. Some scientists, though, entertain an ever more exciting possibility: what if Oumuamua is not an asteroid (小行星), as most think, but an alien (外星的) spacecraft? Asteroid come in all sorts of shapes and sizes, but Oumuamua seems particularly different. As best as astronomers can tell, it is cigarlike, being roughly 180 meters long but only about 30 meters wide. That makes it longer than anything known of in the solar system. Such a shape would be a sensible choice for a spaceship, since it would minimize the scouring (冲刷) effect of interstellar dust.With that in mind the Breakthrough Listen project, an organization aimed at hunting for alien life, plans to turn the world’s biggest radio telescope,the Green Bank instrument in Virginia, towards Oumuamua to see if it can hear anything interesting. Oumuamua is currently about twice as far from Earth as Earth is from the sun. At that range, the telescope should be sensitive enough to pick up a transmitter about as powerful as a mobile phone after just a few seconds—worth of observations.Will it find anything? Almost certainly not. Oumuamua has the same reddish color as many as asteroids, so probably has a similar composition. And, if it really is a spaceship, it is strange that signs of its artificial origin have not been seen already. It could, in theory, be a derelict (遗弃星球).But in that case the telescope is unlikely to hear anything. By far the most likely option is that it is exactly what it seems to be: a huge space rock, one that has come to the solar system from the vast space between the stars.32. What makes some scientists think Oumuamua is possibly an alien spacecraft?A. Its size.B. Its color.C. Its shape.D. Its speed.33. What does the underlined word “that” in the third paragraph probably mean?A. The research into the solar system.B. The purpose of hunting for alien life.C. The effect of interstellar dust on Oumuamua.D. The possibility of Oumuamua being a spaceship.34. What is Oumuamua most likely to be according to the author?A. An asteroid.B. A space rock.C. Interstellar dust.D. An alien spacecraft.35. It can be inferred from the last paragraph that__________.A. Oumuamua will return to where it’s from soonB. Oumuamua’s real identity remains to be found outC. astronomers have not seen signs of Oumuamua’s artificial originD. the Green Bank telescope has already heard something from Oumuamua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人空白处的最佳选项。
东北三校2019届高三第一次模拟考试 数学(理)
哈师大附中、东北师大附中、辽宁省实验中学2019年高三第一次联合模拟考试数学(理)试题本试卷分第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)两部分,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,考生务必先将自己的姓名、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o .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.作图可先使用铅笔画出,确定后必须用黑色字迹的签字笔描黑。
5.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。
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.设全集U=R ,集合A={x|x≥2},B={x|0≤x<5},则集合(C u A )B= ( ) A .{x|0<x<2} B .{x |0<x≤2} C .{x|0≤x<2}D .{x| 0≤x≤2} 2.命题“若x>1,则x>0”的否命题是( )A .若x>l ,则x≤0B .若x≤l ,则x>0C .若x≤1,则x≤0D .若x<l ,则x<0 3.在复平面内复数z=341ii+-对应的点在( )A .第一象限B .第二象限C .第三象限D .第四象限 4.已知数列{a n }是等差数列,且a 1+a 4+a 7= 2π,则tan( a 3+a 5)的值为 ( )AB .C D .5.与椭圆C :221612y x + =l 共焦点且过点(1 ( )A .x 2一23y =1B .y 2—2x 2=1C .22y 一22x =1 D .23y 一x 2 =16.将4名实习教师分配到高一年级的3个班实习,若每班至少1名教师,则不同的分配方案种数为( )A .12B .36C .72D .1087.按如图所示的程序框图运行后,输出的结果是63,则判断框中的整数M 的值是( ) A .5B .6C .7D .88.若n 的展开式中第四项为常数项,则n=( )A .4B .5C .6D .79.已知函数y=Asin (x ωϕ+)+k 的最大值为4,最小值为0,最小正周期为2π,直线x=3π是其图象的一条对称轴,则下面各式中符合条件的解析式为( ) A .y= 4sin (4x+6π) B .y =2sin (2x+3π)+2C .y= 2sin (4x+3π)+2D .y=2sin (4x +6π)+210.点A 、B 、C 、D 在同一个球的球面上,AC =2,若四面体ABCD 体积的最大值为23,则这个球的表面积为 ( )A .1256πB .8πC .254πD .2516π11.若点P 在抛物线y 2= 4x 上,则点P 到点A (2,3)的距离与点P 到抛物线焦点的距离之差( ) A .有最小值,但无最大值 B .有最大值,但无最小值 C .既无最小值,又无最大值 D .既有最小值,又有最大值12.已知f (x )=111nxnx x-+,f (x )在x=x O 处取最大值,以下各式正确的序号为 ( ) ①f (x o )<x o ②f (x o )=x o ③f (x o )>x o ④f (x o )<12 ⑤f (x o )>12A .①④B .②④C .②⑤D .③⑤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。
东北三省三校(哈尔滨师大附中、东北师大附中、 辽宁省实验中学)2019届高三第一次模拟数学(文)
东北三省三校2019届高三第一次模拟考试(哈尔滨师大附中、东北师大附中、辽宁省实验中学)数学(文)试题一、单选题1.复数的虚部是()A.4 B.-4 C.2 D.-2【答案】D2.集合,,则()A.B.C.D.【答案】B3.已知向量的夹角为,,,则()A.B.C.D.【答案】C【解析】由题,先求出,可得结果.4.设直线与圆相交于两点,且,则圆的面积为()A.B.C.D.【答案】C5.等差数列的前项和为,且,,则()A.30 B.35 C.42 D.56【答案】B6.已知,,则()A.B.C.D.【答案】A7.执行两次下图所示的程序框图,若第一次输入的的值为4,第二次输入的的值为5,记第一次输出的的值为,第二次输出的的值为,则()A.2 B.1 C.0 D.-1【答案】D8.设,,,则的大小关系为()A.B.C.D.【答案】B9.已知是不重合的平面,是不重合的直线,则的一个充分条件是()A.,B.,C.,,D.,,【答案】C10.圆周率是圆的周长与直径的比值,一般用希腊字母表示,早在公元480年左右,南北朝时期的数学家祖冲之就得出精确到小数点后7位的结果,他是世界上第一个把圆周率的数值计算到小数点后第七位的人,这比欧洲早了约1000年,在生活中,我们也可以通过设计下面的实验来估计的值;从区间内随机抽取200个数,构成100个数对,其中满足不等式的数对共有11个,则用随机模拟的方法得到的的近似值为()A.B.C.D.【答案】A11.双曲线的左焦点为,点的坐标为,点为双曲线右支上的动点,且周长的最小值为8,则双曲线的离心率为()A.B.C.2 D.【答案】D12.若函数在区间上有两个极值点,则实数的取值范围是()A.B.C.D.【答案】D二、填空题13.已知满足约束条件:,则的最大值是______.【答案】314.甲、乙、丙三人中,只有一个会弹钢琴,甲说:“我会”,乙说:“我不会”,丙说:“甲不会”,如果这三句话,只有一句是真的,那么会弹钢琴的是_____.【答案】乙15.四面体中,底面,,,则四面体的外接球的表面积为____.【答案】三、解答题16.设函数.(1)当时,求函数的值域;(2)中,角的对边分别为,若,且,求的面积.【答案】(1)(2)17.世界卫生组织的最新研究报告显示,目前中国近视患者人数多达6亿,高中生和大学生的近视率均已超过七成,为了研究每周累计户外暴露时间(单位:小时)与近视发病率的关系,对某中学一年级200名学生进行不记名问卷调查,得到如下数据:(1)在每周累计户外暴露时间不少于28小时的4名学生中,随机抽取2名,求其中恰有一名学生不近视的概率;(2)若每周累计户外暴露时间少于14个小时被认证为“不足够的户外暴露时间”,根据以上数据完成如下列联表,并根据(2)中的列联表判断能否在犯错误的概率不超过0.01的前提下认为不足够的户外暴露时间与近视有关系?附:P【答案】(1) (2)见解析18.如图,四棱锥中,底面是平行四边形,平面,垂足为,在上,且,,,四面体的体积为.(1)求点到平面的距离;(2)若点是棱上一点,且,求的值.【答案】(1)(2)319.已知分别是椭圆:的左右焦点,点在椭圆上,且抛物线的焦点是椭圆的一个焦点.(1)求椭圆的标准方程;(2)过点作不与轴重合的直线,设与圆相交于两点,且与椭圆相交于两点,当时,求的面积.【答案】(1)(2)【解析】(1)由焦点为,求得,,解得,从而可得结果;(2)设直线方程为,联立,由,结合韦达定理求得,再联立,由,利用韦达定理可得结果.【详解】(1)焦点为,则,解得,所以椭圆的标准方程为(2)由已知,可设直线方程为,联立得易知则=.因为,所以,解得.联立,得,设,则【点睛】本题主要考查椭圆的方程以及直线与椭圆的位置关系,属于难题. 求椭圆标准方程的方法一般为待定系数法,根据条件确定关于的方程组,解出从而写出椭圆的标准方程.解决直线与椭圆的位置关系的相关问题,其常规思路是先把直线方程与椭圆方程联立,消元、化简,然后应用根与系数的关系建立方程,解决相关问题.涉及弦中点的问题常常用“点差法”解决,往往会更简单.20.已知函数(为自然对数的底数),.(1)当时,求函数的极小值;(2)若当时,关于的方程有且只有一个实数解,求的取值范围.【答案】(1)0(2)【解析】(1)当时,,,令,可得,列表判断两边的符号,根据极值的定义可得结果;(2)化简,求得,,设,可得,讨论的取值范围,根据函数的单调性,结合零点存在定理即可筛选出符合题意的的取值范围.【详解】(1)当时,,,令则列表如下:所以.(2)设,,设,,由得,,,在单调递增,即在单调递增,,①当,即时,时,,在单调递增,又,故当时,关于的方程有且只有一个实数解,符合题意.②当,即时,由(1)可知,所以,又故,当时,,单调递减,又,故当时,,在内,关于的方程有一个实数解1.又时,,单调递增,且,令,,,故在单调递增,又在单调递增,故,故,又,由零点存在定理可知,,故在内,关于的方程有一个实数解.又在内,关于的方程有一个实数解1,不合题意.综上,.【点睛】本题是以导数的运用为背景的函数综合题,主要考查了函数思想,化归思想,抽象概括能力,综合分析问题和解决问题的能力,属于较难题,近来高考在逐年加大对导数问题的考查力度,不仅题型在变化,而且问题的难度、深度与广度也在不断加大,本部分的要求一定有三个层次:第一层次主要考查求导公式,求导法则与导数的几何意义;第二层次是导数的简单应用,包括求函数的单调区间、极值、最值、零点等;第三层次是综合考查,包括解决应用问题,将导数内容和传统内容中有关不等式甚至数列及函数单调性有机结合,设计综合题.21.选修4-4:坐标系与参数方程在直角坐标系中,曲线的参数方程为(为参数),直线的方程为,以坐标原点为极点,以轴正半轴为极轴建立极坐标系.(1)求曲线的极坐标方程;(2)曲线与直线交于两点,若,求的值.【答案】(1);(2)【解析】(1)先将曲线的参数方程化为普通方程,然后再化为极坐标方程;(2)由题意,写出直线的参数方程,然后带入曲线的普通方程,利用韦达定理表示出求得结果即可.【详解】(1)由题,曲线的参数方程为(为参数),化为普通方程为:所以曲线C的极坐标方程:(2)直线的方程为,的参数方程为为参数),然后将直线得参数方程带入曲线C的普通方程,化简可得:,所以故解得【点睛】本题主要考查了极坐标和参数方程的综合,极坐标方程,普通方程,参数方程的互化为解题的关键,属于基础题.22.选修4-5:不等式选讲已知函数.(1)若不等式对恒成立,求实数的取值范围;(2)设实数为(1)中的最大值,若实数满足,求的最小值.【答案】(1);(2)【解析】(1)由不等式性质,解出a的值即可;(2)先求得m的值,然后对原式配形,可得再利用柯西不等式,得出结果.【详解】(1)因为函数恒成立,解得;(2)由第一问可知,即由柯西不等式可得:化简:即当且紧当:时取等号,故最小值为【点睛】本题主要考查了不等式选讲,不等式的性质以及柯西不等式,熟悉柯西不等式是解题的关键,属于中档题.。
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2019年哈师大附中第一次高考模拟考试理 科 数 学本试卷分第I 卷(选择题)和第II 卷(非选择题)两部分,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。
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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。
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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,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2{|20}A x x x =-≤,{|40}B x x =-≤≤,则R A C B = A .RB .{|0}x R x ∈≠C .{|02}x x <≤D .∅ 2.若复数z 满足iz = 2 + 4i ,则复数z =A .2 + 4iB .2 - 4iC .4 - 2iD .4 + 2i3.在251()x x-的二项展开式中,第二项的系数为A .10B .-10C .5D .-54.执行如图所示的程序框图,若输入如下四个函数:①()sin f x x =,②()cos f x x =,③1()f x x=,④2()f x x =, 则输出的函数是 A .()sin f x x = B .()cos f x x = C .1()f x x=D .2()f x x =5.直线m ,n 均不在平面α,β内,给出下列命题:① 若m ∥n ,n ∥α,则m ∥α; ② 若m ∥β,α∥β,则m ∥α; ③ 若m ⊥n ,n ⊥α,则m ∥α; ④ 若m ⊥β,α⊥β,则m ∥α。
其中正确命题的个数是A .1B .2C .3D .46.等差数列{}n a 的前n 项和为S n ,若a 2 + a 4 + a 6 = 12,则S 7的值是A .21B .24C .28D .7 7.某几何体的三视图如图所示,其中俯视图为扇形,则该几何体的体积为A .23πB .3πC .29π D .169π8.220sin 2xdx π=⎰ A .0 B .142π-C .144π- D .12π-9.变量x ,y 满足约束条件1,2,314,y x y x y ≥-⎧⎪-≥⎨⎪+≤⎩若使z = ax + y 取得最大值的最优解有无穷多个,则实数a 的取值集合是A .{3,0}-B .{3,1}-C .{0,1}D .{3,0,1}-10.一个五位自然数12345a a a a a ,{0,1,2,3,4,5}i a ∈,1,2,3,4,5i =,当且仅当a 1 > a 2 > a 3,a 3 < a 4 < a 5时称为“凹数”(如32019,53134等),则满足条件的五位自然数中“凹数”的个数为A .110B .137C .145D .14611.双曲线2222:1(0,0)x y C a b a b -=>>的右焦点为(,0)F c ,以原点为圆心,c 为半径的圆与双曲线在第二象限的交点为A ,若此圆在A 点处切线的斜率为33,则双曲线C 的离心率为 A .31+B .6C .23D .212.已知函数23log (1)1,1()32, x x kf x x x k x a -+-≤<⎧⎪=⎨-+≤≤⎪⎩,若存在k 使得函数()f x 的值域是[0,2],则实数a 的取值范围是A .[3,)+∞B .1[,3]2C .(0,3]D .{2}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,每个试题考生都必须作答,第22题 ~ 第24题为选考题,考生根据要求作答。
二、填空题:本大题共4小题,每小题5分,共20分。
13.若向量a ,b 满足||1=a ,||2=b ,且a 与b 的夹角为3π,则|2|+=a b __________。
14.若33cos()sin 65παα+-=,则5sin()6πα+=__________。
15.正四面体ABCD 的棱长为4,E 为棱BC 的中点,过E 作其外接球的截面,则截面面积的最小值为__________。
16.已知数列{}n a 的通项公式为11n a n =+,前n 项和为S n 。
若对于任意正整数n ,不等式216n n mS S ->恒成立,则常数m 所能取得的最大整数为__________。
三、解答题(解答应写出文字说明,证明过程或演算步骤) 17.(本小题满分12分)三角形ABC 中,内角A ,B ,C 所对边a ,b ,c 成公比小于1的等比数列,且sin sin()2sin 2B A C C +-=。
(1)求内角B 的余弦值; (2)若3b =,求ΔABC 的面积.18.(本小题满分12分)如图,在四棱锥S —ABCD 中,底面ABCD 是直角梯形,AD 垂直于AB 和DC ,侧棱SA ⊥底面ABCD ,且SA = 2,AD = DC = 1。
(1)若点E 在SD 上,且AE ⊥SD ,证明:AE ⊥平面SDC ; (2)若三棱锥S —ABC 的体积16S ABC V -=,求面SAD 与面SBC 所成二面角的正弦值大小。
19.(本小题满分12分)某城市随机抽取一年(365天)内100天的空气质量指数API 的监测数据,结果统计如下:API[0,50] (50,100] (100,150] (150,200] (200,250] (250,300] 300> 空气质量 优 良 轻微污染 轻度污染 中度污染 中度重污染 重度污染天数413183091115(1)若某企业每天由空气污染造成的经济损失S (单位:元)与空气质量指数API (记为ω)的关系式为:0, 0100,4400, 100300,2000, 300.S ωωωω≤≤⎧⎪=-<≤⎨⎪>⎩试估计在本年内随机抽取一天,该天经济损失S 大于200元且不超过600元的概率; (2)若本次抽取的样本数据有30天是在供暖季,其中有8天为重度污染,完成下面2×2列联表,并判断能否有95%的把握认为该市本年空气重度污染与供暖有关?附:P (K 2 ≥ k 0)0.250.150.100.050.025 0.010 0.0050.001k 01.3232.072 2.7063.841 5.024 6.635 7.879 10.82822()()()()()n ad bc K a b c d a c b d -=++++ 非重度污染重度污染合计 供暖季 非供暖季 合计10020.(本小题满分12分)椭圆2222:1(0)x y M a b a b +=>>的离心率为22,且经过点2(1,)2P 。
直线111:l y k x m =+与椭圆M交于A ,C 两点,直线122:l y k x m =+与椭圆M 交于B ,D 两点,四边形ABCD 是平行四边形。
(1)求椭圆M 的方程;(2)求证:平行四边形ABCD 的对角线AC 和BD 相交于原点D ; (3)若平行四边形ABCD 为菱形,求菱形ABCD 面积的最小值。
21.(本小题满分12分)已知函数()(1)x f x x e -=+(e 为自然对数的底数)。
(1)求函数()f x 的单调区间;(2)设函数()()()x x xf x tf'x e ϕ-=++,存在函数12,[0,1]x x ∈,使得成立122()()x x ϕϕ<成立,求实数t 的取值范围。
请考生在第22,23,24题中任选一题作答,如果多做,则按所做的第一题计分,作答时请写清题号。
22.(本小题满分10分)选修4 – 1:几何证明选讲如图,P A ,PB 是圆O 的两条切线,A ,B 是切点,C 是劣弧AB (不包括端点)上一点,直线PC 交圆O 于另一点D ,Q 在弦CD 上,且∠DAQ = ∠PBC 。
求证: (1)BD BCAD AC=; (2)ΔADQ ∽ ΔDBQ 。
23.(本小题满分10分)选修4 – 4:坐标系与参数方程已知在直角坐标系xOy 中,曲线C 的参数方程为14cos 24sin x y θθ=+⎧⎨=+⎩(θ为参数),直线l 经过定点(3,5)P ,倾斜角为3π(1)写出直线l 的参数方程和曲线C 的标准方程;(2)设直线l 与曲线C 相交于A ,B 两点,求||||PA PB ⋅的值。
22.(本小题满分10分)选修4 – 5:不等式选讲设函数()|21||2|f x x x =--+。
(1)求不等式()3f x ≥的解集;(2)若关于x 的不等式2()3f x t t ≥-在[0,1]上无解,求实数t 的取值范围。
2019年东北三省三校第一次高考模拟考试理科数学参考答案13. 14.3515.4π5三、解答题17.解:(Ⅰ) sin sin()2sin 2B AC C +-=sin()sin()4sin cos sin 2sinA C A C C C A C ⇒++-=⇒=……………………….2分2ac ⇒=………………………4分又因为222b ac c ==所以2223cos 24a c b B ac +-==……………………….6分 (Ⅱ)b a c =⇒== (8)分 又因为sin B ==……………………….10分 所以1sin 2ABCSac B ==……………………….12分 18.(Ⅰ)证明: 侧棱⊥SA 底面ABCD ,⊂CD 底面ABCD CD SA ⊥∴. ……………………….1分 又 底面ABCD 是直角梯形,AD 垂直于AB 和DC CD AD ⊥∴,又A SA AD =⊥∴CD 侧面SAD ,……………………….3分 ⊂AE 侧面SAD∴D SD CD SD AE CD AE =⊥⊥ ,,∴⊥AE 平面SDC ……………………….5分(Ⅱ) 连结AC , 底面ABCD 是直角梯形,AD 垂直于AB 和DC ,.1,2===DC AD SA ∴2=AC ,4π=∠CAB ,设t AB =,则t t AC S ABC 2142=⋅=∆, 三棱锥t V ABC S 213261⋅==-,∴21==AB t .……………………….7分 如图建系,则)0,1,1(),0,0,21(),0,1,0(),2,0,0(),0,0,0(C B D S A ,由题意平面SAD 的一个法向量为)0,0,1(=m ,不妨设平面SBC 的一个法向量为),,(z y x n =,)2,0,21(-=SB)2,1,1(-=SC ,则0,0=⋅=⋅SC n SB n ,得⎩⎨⎧=-+=-0204z y x z x ,不妨令1=z ,则)1,2,4(-=n ……………………….10分 214,cos ==〉〈n m n m ,……………………….11分设面SAD 与面SBC 所成二面角为θ,则21105sin =θ……………………….12分 19.解:(Ⅰ)设“在本年内随机抽取一天,该天经济损失S 大于200元且不超过600元”为事件A ……1分 由600200≤<S ,得250150≤<w ,频数为39,……3分分……………………….8分K 2的观测值()2100638227 4.575 3.84185153070k ⨯⨯-⨯=≈>⨯⨯⨯……………………….10分所以有95%的把握认为空气重度污染与供暖有关. ……………………….12分 20.解:(Ⅰ)依题意有22,9141a a b⎧=⎪⎪⎨⎪+=⎪⎩,又因为222a b c =+,所以得222,1.a b ⎧=⎪⎨=⎪⎩ 故椭圆C 的方程为2212x y +=. ……3分(Ⅱ)依题意,点,A C 满足22111,2,x y y k x m ⎧+=⎪⎨⎪=+⎩所以,A C x x 是方程2221111(21)4220k x k m x m +++-=的两个根.得221111218(21)0,4.21A C k m k m x x k ⎧∆=⋅+->⎪⎨+=-⎪+⎩ 所以线段AC 的中点为11122112(,)2121k m m k k -++.同理,所以线段BD 的中点为22222222(,)2121k m m k k -++.……………………….5分 因为四边形ABCD 是平行四边形,所以1122221212221222,2121.2121k m k m k k m m k k ⎧-=-⎪++⎪⎨⎪=⎪++⎩解得,021==m m 或21k k =(舍).即平行四边形ABCD 的对角线AC 和BD 相交于原点O . ……7分(Ⅲ)点,A C 满足2211,2,x y y k x ⎧+=⎪⎨⎪=⎩所以,A C x x 是方程221(21)20k x +-=的两个根,即2221221A C x x k ==+ 故1221||||2121+⋅+==k k OC OA .同理,1221||||2222+⋅+==k k OD OB . ……………………….9分又因为BD AC ⊥,所以1)1(22)1(1||||2121+⋅+==k k OD OB ,其中01≠k .从而菱形ABCD 的面积S 为||||2OB OA S ⋅=122122121+⋅+=k k 1)1(22)1(12121+⋅+⋅k k , 整理得211)1(1214k k S ++=,其中01≠k .……………………….10分故,当11=k 或1-时,菱形ABCD 的面积最小,该最小值为38. ……12分 21. 解:(Ⅰ)∵函数的定义域为R ,()x xf x e'=-……………………….2分 ∴当0x <时,()0f x '>,当0x >时,()0f x '<。