2016-2017学年湖南省长沙市第一中学高二上学期第一次月考(即开学考试)数学试题
长沙市第一中学2016-2017学年度下学年高二数学第一次月考试题(即开学考试)
时间:120分钟 总分:150分
1.答题前,考生务必将自己的姓名、准考证号填写在本试题相应的位置。
2.全部答案在答题卡上完成,答在本试题上无效。
3. 考试结束后,将本试题和答题卡一并交回。
学校:___________姓名:___________班级: ___________考号:___________
一、
选择题(本大题60分各小题5分)
1.已知函数()3
f x ax x =-,对区间()0,1上的任意1x ,2x ,且12x x <,都有()()1212f x f x x x -<-成
立,则实数a 的取值范围为( )
A .()0,1
B .[)4,+∞
C .(]0,4
D .(]1,4 2.已知是R 上的单调增函数,则b 的取值范围是( ) (A ) 1-2 (B )2-3 (C )5-9 (D )7-17
3.定义在R 上的偶函数()y f x =满足(2)()f x f x +=-,且在[2,0]x ∈- )
A .a b c >>
B .b c a >>
C .b a c >>
D .c a b >>
4.设函数,则
A .3 B.1 C.0 D. 5.已知函数()()sin f x x ωϕ=+(其中)的图象如图所示,则函数()f x 的解析式为( )
A B C D
6.已知函数()2sin()(0,0)f x x ωϕωϕπ=+><<的图象上相邻两个最高点的距离为π,若将函数()f x 个单位长度后,所得图象关于y 轴对称,则()f x 的解析式为( )
A C
7( )
A B C D 8.在中,,且的面积为,则的长为( ) A . B .3 C . D .7
9.化简=--+CD AC BD AB ( ).
A.AD
B. BC
C. 0
D.DA
10.图中的小网格由大小相等的小正方形拼成,则向量C C A -B =
( )
A .123e e +
B .123e e -
C .123e e -+
D .123e e --
11.在同一平面直角坐标系中,直线22=-y x 变成直线42='-'y x 的伸缩变换是( )
A.⎩⎨⎧='='y y x x 4 B.⎩⎨⎧='='y y x x 4
C.⎩⎨⎧='='y y x
x 2
D.⎩
⎨⎧='='y y x
x 2
12.已知直三棱柱111C C AB -A B 的6个顶点都在球O 的球面上,若3AB =,C 4A =,C AB ⊥A ,
112AA =,则球O 的表面积为为( )
A .153π
B .160π
C .169π
D .360π
二、填空题(本大题20分各小题5分)
13.过原点的直线被圆222440x y x y +--+=所截得的弦长为2,则该直线的方程为_______. 14.如图,为了测量河对岸A 、B 两点之间的距离,观察者找到一个点C ,从C 点可以观察到点A 、B ;找到一个点D ,从D 点可以观察到点A 、C ;找到一个点E ,从E 点可以观察到点B 、C ;并测量得到一些数据:CD 2=,,D 45∠= ,CD 105∠A = ,C 48.19∠A B = ,C 75∠B E = ,60∠E = ,则A 、B 两点之间的距离为 .(其中cos 48.19 取近似值
15. 某单位为了了解用电量y (度)与气温x (度)之间的关系,随机统计了某4天的用电量与当天气温,
由表中数据,得回归直线方程ˆˆˆy
bx a =+,若ˆ2b =-,则ˆa =________.
16.已知某棱锥的三视图如图所示,俯视图为正方形,根据图中所给的数据,那么该棱锥外接球的体积是________.
三、解答题(本大题70分17,18,19,20小题10分21,22小题15分)
17.某校为了解本校学生在校小卖部的月消费情况,随机抽取了60名学生进行统计,得到如下样本频数分布表:
记月消费金额不低于300元为“高消费”,已知在样本中随机抽取1人,抽到是男生“高消费”
(1)从月消费金额不低于400元的学生中随机抽取2人,求至少有1人月消费金额不低于500元的概率; (2)请将下面的22⨯列联表补充完整,并判断是否有90%的把握认为“高消费”与“男女性别”有关,
,其中n a b c d =+++)
18.如图,在四棱锥P ABCD -中,PC ⊥平面ABCD ,//AB CD ,22AB CD AD ==,点,,M N E 分别为,,PA BC AB 的中点.
(1)求证://MN 平面PCD ;
(2)求证:平面PDE ⊥平面PAC .
19.平面内有一个ABC ∆和一点O ,线段OA OB OC 、、的中点分别为E F G BC CA AB 、、,、、的中点
分别为L M N 、、,设,,OA a OB b OC c ===
. (1)试用,,a b c 表示向量,EL FM GN
、;
(2)证明线段EL FM GN 、、交于一点且互相平分.
20.设ABC ∆的内角,A B C ,所对的边长分别为,,a b
c ,且 (1 (2,BC 边上的中线AM 的长为,求ABC ∆的面积.
21.某地区预计从2015年初开始的第月,商品A (,价格单位:元),且第月该商品的销售量
(单位:万件).
(1)商品A 在2015年的最低价格是多少?
(2)2015年的哪一个月的销售收入最少,最少是多少?
x
12
,≤∈x N x x
12
)(+=x x g
22.定义在()()+∞⋃∞-,00,上的函数)(x f ,总有)()()(n f m f mn f =,且0)(>x f ,当1>x 时,
1)(>x f .
(1)求)1(),1(-f f 的值; (2)判断函数的奇偶性,并证明;
(3)判断函数在()+∞,0上的单调性,并证明.
参考答案
1.B2.D3.B4.A5.C6.C7.D8.A9.C10.B11.A12.C13.2y x =14.
. 16.
17.(1(2)没有90%的把握认为“高消费”与“男女性别”有关 18.(1)见解析;(2)见解析
,,
21.(1)16.5元;(2)第5月的销售收入最低. 最低销售收入为289万元.
22.(1)(1)1f =,1)1(=-f ;(2)函数()f x 为偶函数,证明见解析;(3)函数()f x 为增函数。
湖南省长沙市第一中学2017-2018学年高二上学期第一次月考(即开学考试)生物试题 Word版含答案
长沙市第一中学2017-2018学年度下学年高二生物第一次月考试题(即开学考试)时量:90分钟总分:100分1.答题前,考生务必将自己的姓名、准考证号填写在本试题相应的位置。
2.全部答案在答题卡上完成,答在本试题上无效。
3.考试结束后,将本试题和答题卡一并交回。
学校:___________姓名:___________班级:___________考号:___________注:本试卷分两部分选择题.综合题一、选择题(本大题50分各小题2分)1.有关生命系统中信息的叙述,错误的是A.信息传递是生命系统维持稳定所必需的B.行为信息的传递能够调节生物的种间关系C.精子和卵细胞通过细胞膜接触实现信息交流D.生长激素进入靶细胞而发挥其信息调节的作用2.下列有关生物实验原理、方法或结果的描述中,正确的是A.“制作并观察植物细胞有丝分裂的临时装片”活动中,需保持细胞的活体状态B.探究培养液中酵母菌种群数量的变化实验中吸取培养液制临时装片前要将试管静置后才能取样C.观察DNA和RNA的分布实验中HCl的的作用是改变细胞膜的通透性和使染色体分解D.提取叶绿体中的色素时,加少量CaCO3是为防止研磨时叶绿素被破坏3.下列关于实验的叙述中正确的是()A.在观察DNA和RNA在细胞中的分布实验中,用盐酸使组织中的细胞相互分离开来B.在研究温度对酶活性的影响的实验中,可以用过氧化氢为底物C.纸层析法分离叶绿体中的色素时,含量高的色素随层析液在滤纸上扩散的快D.研究动物激素的生理功能,可以用饲喂法、切除法进行对照实验4.(2018上海卷.20)下列化学反应属于水解反应的是①核酸→核苷酸②葡萄糖→丙酮酸③ATP→ADPA.①②B.①③C.②③D.①②③5.下图能用来准确表示哪一组概念之间的关系A.1表示生态系统信息种类,2-4分别表示物理信息、化学信息、生物信息B.1表示免疫系统,2-4分别表示免疫器官、免疫细胞、免疫活性物质C.1表示ATP,2-4分别表示腺嘌呤、脱氧核糖、磷酸D.1表示细胞的统一性,2-4分别细胞膜、细胞液、DNA6.下列4种生物中,哪一种生物的细胞结构与其他3种生物的细胞有明显的区别()A.酵母菌 B.乳酸菌 C.青霉菌 D.蘑菇7.下列有关线粒体与叶绿体之间的联系,下列说法正确的是()A.在夜间线粒体可为叶绿体提供CO2,参与暗反应B.在白天叶绿体可为线粒体提供02,并在线粒体内参与有机物的氧化分解C.在线粒体和叶绿体的内膜、基质中分布着相同的酶D.线粒体和叶绿体中均含DNA,而叶绿体的基质中还含有与光合作用有关的色素8.下图是关于生物学中某些变化趋势的曲线图,其中说法正确的是A.若x表示时间,y表示生理作用,则a、b可以分别表示生长素对横放根是、的远地侧和近地侧的促进作用B.若x表示生态系统中营养结构的复杂程度,y表示稳定性,则a、b可以分别表示恢复力稳定性、抵抗力稳定性C.若x表示喷施农药的浓度,y表示基因频率,则a、b可以分别表示害虫种群中抗药性基因和不抗药基因频率的变化D.若x表示时间,y表示变化量,则a、b可以分别表示适当提高CO2浓度后,某植物叶绿体内C3、C5的含量变化9.下列生理活动可“双向”进行的是A.生长素在胚芽鞘中的极性运输 B.缩手反射时兴奋在神经元间的传递C.活细胞内ATP与ADP的转化 D.草原生态系统中狼和兔间的能量流动10.细胞的衰老是普遍存在的现象。
长沙市第一中学2016-2017高二上学期第一次月考英语答案
长沙市第一中学2016-2017 高二上学期第一次月考英语答案听力答案:1~5 BBACA 6~10 BACCA 11~15 BBAAB 16~20 ACCCA阅读理解21-23CCB 24-27DBBC 28~31 BAAC 32-35CACD 七选五:36-40 FBAEG完形填空41-45 ACBDB 46-50 CCADA 51-55 BADBD 56-60CACBD语法填空:61. lives 62. Reliable 63. Waiting 64. had stopped 65. to find66.the 67. Annoyed 68. It 69.if 70. so短文改错:1.what → that / which2. 去掉 the (fact)3. found 前加been4. thousand → thousands5. recently → recent6. working → work7. wit h → about(busy bees) 8. has → have9. We → They10. surprised → surprisingPossible version:Dear Peter,I would like to tell you that our school has worked out a new program.The aims of the program are to make our school more beautiful, to make the air cleaner and fresher, and to turn our school into a better place for us to study and live in.According to the program, we will plant different kinds of trees and flowers in and around our school. A botanical garden will be built for us to visit and have practical lessons, where we will learn much that we cannot learn in class. Besides, we are to build a small garden in which we can do some reading and take a rest. What’s more, some statues of famous people will be set up to encourage us to work harder. How do you think about this program? I’m confident that when everything is finished according to the program, our school will look wonderful.Welcome to our school if you have the chance to come.Yours,Li Hua。
湖南省长沙市望城区第一中学2016_2017学年高二物理上学期第一次月考试题
望城一中2016年下学期高二第一次调研物理试题一、单选题(每小题3分12小题共36分)1.下列关于起电的说法错误的是()A.静电感应不是创造电荷,只是电荷从物体的一个部分转移到了另一个部分B.摩擦起电时,失去电子的物体带正电,得到电子的物体带负电C.摩擦和感应都能使电子转移,只不过前者使电子从一个物体转移到另一个物体上,而后者则使电子从物体的一部分转移到另一部分D.一个带电体接触一个不带电的物体,两个物体可能带上异种电荷2.对于点电荷的理解,正确的是( )A.点电荷就是带电荷量很少的带电体B.点电荷就是体积很小的带电体C.体积大的带电体肯定不能看成点电荷D.带电体如果本身大小和形状对它们间的相互作用影响可忽略,则可视为点电荷3.两个完全相同的金属球A和B带电量之比为1:7 ,相距为r 。
两者接触一下放回原来的位置,若两电荷原来带异种电荷,则后来两小球之间的静电力大小与原来之比是() A.16:7 B.9:7 C.4:7 D.3:74.下列关于场强和电势的叙述正确的是()A.在匀强电场中,场强处处相同,电势也处处相等B.在正点电荷形成的电场中,离点电荷越远,电势越高,场强越小C.等量异种点电荷形成的电场中,两电荷连线中点的电势为零,场强不为零 D.在任何电场中,场强越大的地方,电势也越高5、在电场中某点,当放入正电荷时受到的电场力向左,以下说法中正确的是()A.只有在该点放正电荷时,该点场强向左 B.只有当在该点放负电荷时,该点场强向右C.该点的场强方向一定向左 D.该点的场强方向可能向右,也可能向左6.对于电场中A、B两点,下列说法正确的是( )A.电势差的定义式U AB=W AB/q,说明两点间的电势差U AB与电场力做功W AB成正比,与移动电荷的电荷量q成反比B.A、B两点间的电势差等于将正电荷从A点移到B点电场力所做的功C.将+1 C电荷从A点移到B点,电场力做1 J的功,这两点间的电势差U AB为1 VD.电荷由A点移到B点的过程中,除受电场力外,还受其他力的作用,电荷电势能的变化就不再等于电场力所做的功7、一个不带电的空心金属球,在它的球心处放一个正点荷,其电场分布是如图所示中的哪一个()8、如图所示,带正电的小球靠近不带电的绝缘支架上的金属导体AB的A端,由于静电感应,A端出现负电荷,B端出现正电荷,则( )A.用手触摸一下B端,移开带电小球,导体带负电B.用手触摸一下A端,移开带电小球,导体带正电C.用手触摸一下导体的中部,移开带电小球,导体不带电D.用手触摸一下导体的中部,移开带电小球,导体带正电9、一个带电粒子在匀强电场中运动的轨迹如如图中曲线AB所示,平行的虚线a、b、c、表示该电场中的四个等势面.不计粒子重力,下列说法中正确的是()A.该粒子一定带正电B.四个等势面中a等势面的电势一定最低C.该粒子由A到B过程中动能一定逐渐减小D.该粒子由A到B过程中电势能一定逐渐减小10.A、B、C是匀强电场中的三个点,各点电势φA=10V,φB=2V,φC=6V,A、B、C三个点在同一平面上,图中电场强度的方向表示正确的是()A. B. C. D.11. 下列关于电场强度的说法中,正确的是 ( )。
求直线的倾斜角或斜率的范围-2018版高人一筹之高二数学特色训练含解析
一、选择题1.【四川省三台中学2017-2018学年高二上学期开】直线的倾斜角为( )A . 30°B . 45°C 。
60°D 。
90°【答案】B【解析】试题分析:由直线方程可知斜率考点:直线倾斜角和斜率2.【湖北省长阳县第一高级中学2017-2018学年高二9月月考】设点A (2,-3),B (-3,-2),直线过点P (1,1)且与线段AB 相交,则的斜率k 的取值范围是( )A 。
k ≥或k ≤-4B 。
-4≤k ≤C 。
-≤k ≤4D 。
以上都不对 【答案】A考点:直线的斜率运用.3.【湖北省荆州中学2017-2018学年高二上学期第一次月考】直线22sin cos 055x y ππ-=的倾斜角α是( )A .25π-B 。
25πC 。
35π D 。
75π 【答案】B【解析】直线22sin cos 055x y ππ-=的斜率为2sin25k tan25cos 5πππ==,∴25πα=.故选:B4.【河北省廊坊市省级示范高中联合体2016-2017学年高一下学期期末】直线102n mx y +-=在y 轴上的截距是—1,且它的倾斜角是直线3330x y --=的倾斜角的2倍,则( )A .3,2m n == B .3,2m n =-=- C .3,2m n ==- D 。
3,2m n =-=【答案】B 【解析】设直线3330x y --=的倾斜角是α ,则直线:102n l mx y +-=的倾斜角为2α ∵tan 3α=,∴直线102n mx y +-=m 的斜率222323113tan k tan tan ααα====---∴直线l 的斜截式方程为: 31y x =--, 3,m ∴=- 2n =- ,故选:B .5.【襄阳市第四中学2017-2018学年高二上学期第一次月考】直线sin cos 77x y ππ+的倾斜角α是( )A .7π-B 。
湖南省长沙市望城区第一中学2016-2017学年高二数学上学期第一次月考试题 文
湖南省长沙市望城区第一中学2016-2017学年高二数学上学期第一次月考试题 文一.选择题(本题共12小题,每小题5分) 1.命题“若a =0, 则ab =0”的逆否命题是( )A .若ab =0,则a =0B .若a ≠0,则ab ≠0C .若ab =0,则a ≠0D .若ab ≠0,则a ≠0 2.若命题“p 且q ”为假,且p 为真,则( )A .“p 或q ”为假B .q 为假C .q 为真D .不能判断q 的真假 3.已知命题p :∀x ∈R ,sin x ≤1,则( )A .p ⌝:∃x 0∈R ,sin x 0≥1B .p ⌝:∀x ∈R ,sin x ≥1C .p ⌝:∃x 0∈R ,sin x 0>1D .p ⌝:∀x ∈R ,sin x >14.双曲线221124x y -=的焦距..是( )A ..8 C ..165.双曲线2214x y -=的渐近线方程为( ) A .2y x =± B .12y x =±C .4y x =±D .14y x =± 6.等比数列{}n a 中,2a =4,1617=a ,则5463a a a a +的值是( )A.1B.2C.21D.417.若焦点在x 轴上的椭圆x 22+y 2m =1的离心率为12,则m 等于( )A . 3B .32C .83D .238.设C ∆AB 的内角A ,B ,C 的对边分别为a ,b ,c .若2a =,c =,cos A =且b c <,则b =( )A .2 C . D .3A.11<<-kB.0>kC.0≥kD.11-<>k k 或 10. “0>x ”是“0≠x ”的( )A .充分而不必要条件B .必要而不充分条件C .充分必要条件D .既不充分也不必要条件11.若直线2+=kx y 与椭圆12322=+y x 相切,则斜率k 的值是( ) A.36B.36-C.36±D.33±12.若点O 和点F 分别为椭圆x 24+y 23=1的中心和左焦点,点P 为椭圆上的任意一点,则FP OP ∙的最大值为( )A .2B .3C .6D .8二.填空题(本题共4小题,每小题5分) 13.函数)43sin()(π+=x x f 的最小正周期是 ;14.P 是椭圆x 2+4y 2=16上一点,且|PF 1|=7,则|PF 2|= ;15.设P 为椭圆x 2100+y 264=1上一点,F 1、F 2是其焦点,若∠F 1PF 2=π3,则△F 1PF 2的面积为 ;16.A 的斜率为的直线交椭圆于另一个点,且点在轴上的射影恰好为右焦点,若则椭圆离心率的取值范围 .三.解答题:17.(本题10分)已知双曲线焦点在 x 轴上,虚轴长为12,离心率为 54,求双曲线的标准方程:k C B x F18.(本题12分)在等差数列{n a }中, 已知4a =-15, 公差d =3, (1)求数列{n a }的通项公式.(2)求数列{n a }的前n 项和n S 的最小值.19.(本题12分)在ABC △中,内角A B C ,,对边的边长分别是a b c ,,,已知2c =,3C π=.(1)若ABC △求a b ,; (2)若sin 2sin B A =,求ABC △的面积.20.(本题12分)已知全集R U =,非空集合⎭⎬⎫⎩⎨⎧<--=032x x x A ,{}0)4)((<---=a x a x x B .B A ⋂; (2)命题A x p ∈:,命题B x q ∈:,若p ⌝是q ⌝的必要不充分条件,求实数a 的取值范围.21. (本题12分)已知直线1+-=x y 与椭圆)0(12222>>=+b a by a x 相交于A 、B 两点.若椭圆的离心率为33,焦距为2. (1) 求椭圆的标准方程; (2) 求线段AB 的长.22. (本题12分)已知椭圆)0(12222>>=+b a by a x 的离心率36=e .过点),0(b A -和)0,(a B 的直线与原点的距离为32. (1)求椭圆的方程;(2)已知定点)0,1(-E ,若直线)0(2≠+=k kx y 与椭圆交于C ,D 两点,问:是否存在k 的值,使以CD 为直径的圆过E 点,请说明理由.2016年下学期高二第一次调研考试数学试卷(文)一.选择题(本题共12小题,每小题5分) 1.命题“若a =0, 则ab =0”的逆否命题是(D )A .若ab =0,则a =0B .若a ≠0,则ab ≠0C .若ab =0,则a ≠0D .若ab ≠0,则a ≠0 2.若命题“p 且q ”为假,且p 为真,则( B )A .“p 或q ”为假B .q 为假C .q 为真D .不能判断q 的真假 3.已知命题p :∀x ∈R ,sin x ≤1,则( C )A .p ⌝:∃x 0∈R ,sin x 0≥1B .p ⌝:∀x ∈R ,sin x ≥1C .p ⌝:∃x 0∈R ,sin x 0>1D .p ⌝:∀x ∈R ,sin x >14.双曲线221124x y -=的焦距..是(B )A ..8 C ..165.双曲线2214x y -=的渐近线方程为(B ) A .2y x =± B .12y x =±C .4y x =±D .14y x =± 6.等比数列{}n a 中,2a =4,1617=a ,则5463a a a a +的值是( C )A.1B.2C.21D.417.若焦点在x 轴上的椭圆x 22+y 2m =1的离心率为12,则m 等于( B )A . 3B .32C .83D .238.设C ∆AB 的内角A ,B ,C 的对边分别为a ,b ,c .若2a =,c =,cos A =且b c <,则b =( B )A .2 C . D .3A.11<<-kB.0>kC.0≥kD.11-<>k k 或 10. “0>x ”是“0≠x ”的( A )A .充分而不必要条件B .必要而不充分条件C .充分必要条件D .既不充分也不必要条件11.若直线2+=kx y 与椭圆12322=+y x 相切,则斜率k 的值是( C ) A.36B.36-C.36±D.33±12.若点O 和点F 分别为椭圆x 24+y 23=1的中心和左焦点,点P 为椭圆上的任意一点,则FP OP ∙的最大值为( C )A .2B .3C .6D .8 二.填空题(本题共4小题,每小题5分) 13.函数)43sin()(π+=x x f 的最小正周期是 3;14.P 是椭圆x 2+4y 2=16上一点,且|PF 1|=7,则|PF 2|= 1 ; 15.设P 为椭圆x 2100+y 264=1上一点,F 1、F 2是其焦点,若∠F 1PF 2=π3,则△F 1PF 2的面积为16.A 的斜率为的直线交椭圆于另一个点,且点在轴上的射影恰好为右焦点,若则椭圆离心率的取值范围 )32,21( . 三.解答题:17.(本题10分)已知双曲线焦点在 x 轴上,虚轴长为12,离心率为 54,求双曲线的标准方程:根据题意可知2b=12,解得b=6 ①==a c e 18.(本题12分)在等差数列{n a }中, 已知4a =-15, 公差d =3, (1)求数列{n a }的通项公式.(2)求数列{n a }的前n 项和n S 的最小值. (1)a4=a1+3d=a1+9=-15 a1=-24 an=a1+(n-1)d=-24+3(n-1)=3n-27C k(2)an=3n-27<=0n<=9则当n=8和9时,Sn 最小S8=S9=8*(-24)+28*3=-10819.(本题12分)在ABC △中,内角A B C ,,对边的边长分别是a b c ,,,已知2c =,3C π=.(1)若ABC △,求a b ,; (2)若sin 2sin B A =,求ABC △的面积.解:(1)由余弦定理得,,又因为的面积等于,所以,得.联立方程组解得,.(2)由正弦定理,已知条件化为,联立方程组解得,.所以的面积20.(本题12分)已知全集R U =,非空集合⎭⎬⎫⎩⎨⎧<--=032x x x A ,{0)4)((<---=a x a x x B B A ⋂; (2)命题A x p ∈:,命题B x q ∈:,若p ⌝是q ⌝的必要不充分条件,求实数a 的取值范围.1),当时,,.(2)若是的必要不充分条件,即是充分不必要条件,可知集合是集合的真子集,由,,所以,解得.21. (本题12分)已知直线1+-=x y 与椭圆)0(12222>>=+b a by a x 相交于A 、B 两点.若椭圆的离心率为33,焦距为2.(1) 求椭圆的标准方程;(2)求线段AB 的长. 解:(1)33,22,33===a c c e 即 2,322=-==∴c ab a 则∴椭圆的方程为12322=+y x (2)联立0365:1123222=--⎪⎩⎪⎨⎧+-==+x x y x y y x 得消去 212212221221212122114)(])1(1[)()(||53,56),(),,(x x x x y y x x AB x x x x y x B y x A -+-+=-+-=∴-==+则设538512)56(22=+=22. (本题12分)已知椭圆)0(12222>>=+b a by a x 的离心率36=e .过点),0(b A -和)0,(a B 的直线与原点的距离为32.(1)求椭圆的方程; (2)已知定点)0,1(-E ,若直线)0(2≠+=k kx y 与椭圆交于C ,D 两点,问:是否存在k 的值,使以CD 为直径的圆过E 点,请说明理由.解析:(1)直线AB 方程为:bx -ay -ab =0.依题意⎩⎪⎨⎪⎧c a =63,ab a 2+b 2=32,解得⎩⎨⎧a =3,b =1.∴椭圆方程为x 23+y 2=1.(2)假若存在这样的k 值,由⎩⎪⎨⎪⎧y =kx +2,x 2+3y 2-3=0,得 (1+3k 2)x 2+12kx +9=0. ∴Δ=(12k )2-36(1+3k 2)>0.① 设C (x 1,y 1),D (x 2,y 2),则⎩⎪⎨⎪⎧x 1+x 2=-12k1+3k 2,x 1·x 2=91+3k 2.②而y 1·y 2=(kx 1+2)(kx 2+2)=k 2x 1x 2+2k (x 1+x 2)+4.要使以CD 为直径的圆过点E (-1,0),当且仅当CE ⊥DE 时,则y 1x 1+1·y 2x 2+1=-1. 即y 1y 2+(x 1+1)(x 2+1)=0.∴(k 2+1)x 1x 2+(2k +1)(x 1+x 2)+5=0.③将②式代入③整理解得k =76.经验证k =76使①成立.综上可知,存在k =76,使得以CD 为直径的圆过点E .。
湖南省长沙市第一中学2016-2017学年高二上学期第一次月考物理试题含答案
一、选择题:本题12小题,每小题4分,共48分,每小题给出的四个选项中,第1~8题只有一个选项符合题意,第9~12小题有多个选项符合题意,全部选对得4分,选对单 不全得2分,选错或不答得0分1.一横截面积为S 的铝导线,当有电压加在该导线上时,导线中的电流强度为I ,设每单位体积的导线中有n 个自由电子,电子电荷量为e ,此时电子定向移动的速度为v ,则以下关系正确的是A .I nvS =B .I nev =C .I nevS =D .I neS =2.A 、B 、C 三点在同一直线上,AB :BC=1:2,B 点位于A 、C 之间,在B 处固定一电荷量为Q 的点电荷。
当在A 处放一电荷量为+q 的点电荷时,它所受到的静电力为F ;移去A 处电荷,在C 处放一电荷量为-4q 的点电荷,其所受电场力为 A .2F -B .2FC .-FD .F 3.a 、b 、c 、d 是匀强电场中的四个点,它们正好是一个矩形的四个顶点,电场线与矩形所在平面平行。
已知a 点的电势为20V ,b 点的电势为24V ,d 点的电势为4V ,如图,由此可知c 点的电势为A .4VB .8VC .12VD .24V4.如图所示,平行板电容器与电动势为E 的直流电源(内阻不计)连接,下极板接地。
一带电油滴位于电容器中的P 点且恰好处于平衡状态。
现将平行板电容器的上极板竖直向上移动一小段距离,则A .带电油滴将沿竖直方向向上运动B .P 点的电势将降低C .带电油滴的电势能减小D .电容器的电容减小,则极板带电荷量将增大5.喷墨打印机的简化模型如图所示,重力可忽略的极小墨汁微滴,经带电室带负电后,以速度v 垂直匀强电场飞入极板间,最终打在纸上,则微滴在极板间电场中A .可能向负极板偏转B .电场力做负功,电势能逐渐增大C .运动轨迹与所带电荷量无关D .运动轨迹是抛物线6.如图所示,一电子沿等量异种电荷的中垂线由无穷远处的A→O→无穷远处的B 匀速飞过,电子重力不计,则电子除受电场力外,所受另一个力的大小和方向的变化情况是、A .先变大后变小,方向水平向左B .先变大后变小,方向水平向右C .先变小后变大,方向水平向左D .先变小后变大,方向水平向右7.有一个带正电的金属球壳(厚度不计),其截面图如图a 所示,O 为球心,球壳P 处开有半径远小于球半径的小孔。
长沙一中2016-2017高二语文上学期开学试卷(含答案)
长沙一中2016-2017高二语文上学期开学试卷(含答案)长沙市第一中学2016-2017学年度下学年高二语第一次月考试题(即开学考试)时间:120分钟总分:10分一现代阅读(小题3分总分9分)1阅读下面的字,完成后各题。
昆剧是我国古老的戏曲声腔、剧种,它的原名叫“昆腔”,简称“昆腔”。
元末明初,作为南曲声腔的一个流派,在江苏昆一带产生。
清代以被称为“昆曲”,现又被称为“昆剧”,是明代中叶至清代中叶戏曲中影响最大的声腔剧种。
很多剧种都是在昆剧的基础上发展起的,因此它有“中国戏曲之母”的雅称。
昆剧是中国戏曲史上具有最完整表演体系的剧种,它的基础深厚,遗产丰富,是我国民族化艺术高度发展的成果,在我国学史、戏曲史、音乐史、舞蹈史上占有重要的地位。
该剧种于2001年月18日被联合国教科组织命名为“人类口头遗产和非物质遗产代表作”,是全人类宝贵的化遗产。
作为我国传统戏曲中最古老的剧种之一,昆曲的历史可以上溯到元末明初。
当时,江苏的昆(辖今昆、太仓两处)地区经济繁荣,贸易兴盛,黎民富庶,城乡各个阶层群众对化娱乐有所追求,当时流行一种以地方音乐为基础的南曲,叫昆腔。
昆腔的出现也和当时的顾阿瑛等一批人、士大夫嗜词尚曲有很大关系。
而对昆腔的诞生有直接影响的人物是顾阿瑛的座上客顾坚,他将昆人唱的南曲与当地的语言和民间音乐相结合的歌唱方法,进行改进,形成了一种受当地人欢迎的曲调,到明初正式被称为“昆腔”。
它与起于浙江的海盐腔、余姚腔和起于江西的弋阳腔,被称为明代四大声腔,同属南戏系统。
昆腔开始只是民间的清曲、小唱。
其流布区域,开始只限于苏州一带,到了万历年间,便以苏州为中心扩展到长江以南和钱塘江以北各地,并逐渐流布到福建、江西、广东、湖北、湖南、四川、河南、河北各地,万历末年还流入北京。
这样昆腔便成为明代中叶至清代中叶影响最大的声腔剧种。
这种“小集南唱”、“清柔婉折”的昆腔,在明中后期的嘉靖初年被变革发展,形成了昆曲曲唱体系。
长沙市第一中学高二上开学考试试卷
长沙市第一中学高二英语第一学期第一次月考试题(即开学考试)时间:120分钟总分:150分1.答题前,考生务必将自己的姓名、准考证号填写在本试题相应的位置。
2.全部答案在答题卡上完成,答在本试题上无效。
3. 考试结束后,将本试题和答题卡一并交回。
学校:___________姓名:___________班级:___________考号:___________第一部分第二部分第三部分第四部分总分第二部分阅读理解(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。
ABrian was unhappy because he had to babysit his little sister Crissy on the first day of their mountain vacation since Mom had to pick up Dad at the airport and wouldn’t be back until later. “I’ll miss the Perseids this year,” he said.“What are the Perseids?” Crissy asked.“They’re lots of falling stars called a meteor shower (流星雨) that comes every August,” Brian replied, annoyed.“ Let’s sleep on the deck (露天平台) tonight. We can both watch!” Crissy suggested.That was not a bad idea, Brian thought. “OK. I’ll leave a note i nside so Mom and Dad know we’re on the deck. Go and get your sleeping bag.”When Crissy returned, she asked, “When will the stars come out?”“Soon. The Perseids come early in the morning.”They both soon fell asleep. Suddenly, Brian heard something moving on the other side of the deck. He tried to be very quiet so he would not frighten whatever it was. Carefully, he looked out of the sleeping bag and found there was a large black bear standing on his back legs. Crissy was awake too. “We have a visitor. It’s a bear,” Brian tried to sound confident so C rissy wouldn’t be frightened, but inside, he was very nervous.“I’m scared,” Crissy said in a low voice.“Just don’t move,” Brian warned.The bear was now eating the hamburgers they had placed on the deck earlier. Brian covered both of them with his sleeping bag. Crissy closed her eyes and held her breath. Brian tried to stay still.Minutes later, Crissy asked, “Is he gone?”Looking out of the sleeping bag again, Brian replied, “Yep. I guess he was just hungry.”“Well, I’m just glad he liked our dinner and didn’t eat ME!” Crissy laughed.Brian laughed too, “Nah! That bear just wanted some just food!”Crissy hugged her brother, and Brian hugged her back. Thin gs didn’t turn out so badly after all, he thought.“Look!” Brian said, pointing upward. Above their heads, the Perseids meteor shower had begun to move fast across the night sky like fireworks (烟花).21. When Crissy knew a bear was visiting their deck, she felt_______.A. unhappyB. annoyedC. frightenedD. confident22. What can we know about Brian from the passage?A. He knew a lot of things about the bear.B. He gave the bear some junk food to eat.C. He was a brave, calm and humorous boy.D. He woke up at night because he was hungry.23. What is the best title for the passage?A. Taking a mountain vacationB. Waiting for the PerseidsC. Unusual sound at nightD. Fireworks showBDear Editor,I have just returned home after studying for a year in Germany. But it seems that my parents don’t understand me now. They expect me to be the same person I was before I went abroad, but I’m not! Why can’t they let me be myself?JimmyHi, Jimmy,As far as I know, people who have lived abroad often find that the adjustment (调整) to returning home is more difficult than their adjustment to living in a foreign culture. Why? We expect to have some problems when we go to a new place, speak a different language and learn the rules of a different culture ... But home? ... we know that place!Your parents expect that the same person who boarded the airplane one year ago will be returning. Especially if they have never been abroad themselves, your parents probably won’t understand the changes that living abroad can cause in a person. On the other hand, you may have maintained (保持) an ideal mental image of your loved ones while abroad, an image that is broken into pieces when you return.Remember you have been living a different lifestyle in your host country, and you have probably become very independent while staying there alone. Now that you’re home, you will be expected to conform (顺应)again to the lifestyle of your family. As a result, you may be upset about your parents’ involvement in your life.Communication is the key to overcoming this problem. Tell your parents how you are feeling. Share with them information about cultural re-entry(重归), and ask them to be patient. This does not mean that you have to forget your experience and give up everything you’ve learned! Learn to find a balance between the old and new, just as you d id when first adjusting to your host country’s culture.24. What is Jimmy’s main purpose in writing the letter?A. To criticize his parents.B. To ask for advice about his studies.C. To complain about his parents.D. To ask for help.25. What does the editor think of Jimmy’s problem?A. It’s unusual.B. It’s normal.C. It’s serious.D. It’s interesting.26. The editor thinks that both Jimmy and his parents ______.A. have changed in the past yearB. have unrealistic expectations of each otherC. need to behave like they did beforeD. need to find a balance between the good and bad27. The author suggests that ______ would help solve Jimmy’s problem.A. patience and trustB. patience and politenessC. better communication between family membersD. a deeper understanding of the host country’s cultureCLike people, plants experience stress. And also, like people, the response to that stress can determine success.Bad environmental conditions, such as drought, flood, heat and other stresses, affect yields(产量) more than crop pests and diseases. We are trying to find a way to equip plants with the ability to tolerate environmental stress and maintain high yields, said Stephen Howell, a professor of genetics and cell biology.Plant cells produce proteins(蛋白质) and ship them to different parts of the cell. Under normal conditions, these proteins are folded into their normal, healthy structures as they are produced. When a plant is under stress, its cells produce poorly folded or unfolded proteins. Then a built-in system senses this and “sets off an alarm in the cell,” said Howell.In response to the alarm, another protein (IRE1) starts working and creates a different process which activates (激活) the stress response genes whose products bring about defensive measures that help the plant survive.“As it turns out, responses that are activated under stress conditions actually inhibit the growth of plants,” said Howell. “This allows them to preserve their energy to survive the stress conditions.”For plants in the wild, this response is a help for survival, he said. In production of agriculture crops, however, this response reduces yields.“You don’t want crop plants to stop growing,” Howell said. “You want them to continue to grow and produce even though they are under stress.”With the new understanding of this stress response, the next step may be to silence the alarm system, said Howell. “What may be important is to disable some of these stress responses. That may make the plant more productive under stress conditions.”28. According to the text, an alarm in the plant cells is caused by .A. the folded proteinsB. the changed proteinsC. the defensive measuresD. the stress response genes29. The energy preserved in the plants under stress conditions .A. helps the plants to surviveB. helps to maintain high yieldsC. keeps the plants growingD. helps to produce proteins30. The underlined word “inhibit” in Paragraph 5 can be replaced by “_.”.A. preventB. startC. continueD. promote31. How does Howell intend to make crop plants maintain high yields under stress conditions?A. By making crop plants keep more energy.B. By making crop plants stop growing.C. By making the alarm system stop working.D. By making the alarm system respond quickly.D“Cleverness is a gift while kindness is a choice. Gifts are easy –they’re given after all. Choices can be hard.” –– Jeff Bezos.I got the idea to start Amazon 16 years ago. I came across the fact that the Internet usage was growing at 2,300 percent per year. I’d never seen or heard of anything that grew that fast, and the idea of building an online bookstore with millions of titles was very exciting to me. I had just turned 30 years old, and I’d been married for a year. I told my wife MacKenzie that I wanted to quit my job and go to do this crazy thing that probably wouldn’t work since most start-ups don’t, and I wasn’t sure what to expect. MacKenzie told me I should go for it. As a young boy, I’d been a garage inventor. I’d always wanted to be an inventor, and she wanted me to follow my passion.I was working at a financial firm in New York City with a bunch of very smart people, and I had a brilliant boss that I much admired. I went to my boss and told him I wanted to start a company selling books on the Internet. He took me on a long walk in Central Park, listened carefully to me, and finally said, “That sounds like a really good idea, but it would be an even better idea for someone who didn’t already have a good job.” That logic made some sense to me, and he convinced me to think about it for 48 hours before making a final decision. Seen in that light, it really was a difficult choice, but ultimately (最后), I decided I had to give it a shot. I didn’t think I’d regret trying and failing. And I suspected I would always be haunted by a decision to not try at all.After much consideration, I took the less safe path to follow my passion, and I’m proud of that choice. For all of us, in the end, we are our choices.32.What inspired the author with the idea of building an online bookstore?A. His dream of being an inventor.B. The support of his wife.C. The greatly increasing usage of the Internet.D. Millions of exciting titles.33.Which of the following is closest in meaning to the underlined sentence?A. The idea of not trying would keep coming to his mind and disturb him.B. He would be very excited if he tried it out.C. He would be always having a doubt if he didn’t try.D. The decision to not try the online bookstore would terrify him.34.We can know from the passage that _______.A. the boss thought the idea was suitable for the authorB. the author wanted someone else to try the ideaC. the author might not regret if he failed the ideaD. the author might go back to his boss if he failed35.Which of the following would be the best title for the passage?A. Cleverness and KindnessB. The Starting of AmazonC. Following My PassionD. We Are What We Choose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。
