甘肃省河西五市部分普通高中2020┄2021届高三上学期第一次联合考试1月英语试题

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2020届甘肃省河西五市部分普通高中高三第一次联合考试数学(理)科试题(含答案解析)

2020届甘肃省河西五市部分普通高中高三第一次联合考试数学（理）科试题一、单选题1．已知集合2{|log }A x y x =={}|22B x x =-≤≤，则A B =I （）A ．[]12，B ．(02]，C ．[]22-，D ．(2]-∞，【答案】B【解析】2{|log }A x y x == (0,)=+∞,所以(]02A B ⋂=，,选B.2．若()0,απ∈，()sin cos παα-+=，则sin cos αα-的值为（）A ．B ．C ．43D ．43-【答案】C【解析】由诱导公式得sin cos 3αα+=，两边取平方，可得72sin cos 9αα=-，结合()2sin cos 12sin cos αααα-=- 及象限角的符号，即可求得答案. 【详解】由诱导公式得()sin cos sin cos 3παααα-+=+=，平方得()22sin cos 12sin cos 9αααα+=+=，则72sin cos 09αα=-<，所以()216sin cos 12sin cos 9αααα-=-=，又因为()0,απ∈，所以sin cos 0αα->，所以4sin cos 3αα-=，故选C. 【点睛】本题考查利用三角函数的诱导公式、同角三角函数的平方关系化简求值，考查sin +cos αα、sin -cos αα和sin cos αα知一求二的灵活运用.3．已知等比数列{}n a 满足213562,4a a a a ==，则3a 的值为（）A ．1B ．2C ．14D ．12【答案】A【解析】∵等比数列{}n a 满足213562,4a a a a ==，∴22464a a =，又偶数项同号，∴462a a = ∴212q =，∴2311a a q =⨯= 故选：A4．已知m ∈R ，“函数21x y m =+-有零点”是“函数log m y x =在(0,)+∞上是减函数”的（）．A ．充分不必要条件B ．必要不充分条件C ．充要条件D ．即不充分也不必要条件【答案】B【解析】试题分析：由题意得，由函数有零点可得，，而由函数在上为减函数可得，因此是必要不充分条件，故选B ．【考点】1.指数函数的单调性；2.对数函数的单调性；3.充分必要条件. 5．已知0.3log 2a =，0.12b =，sin 789c =o ，则a ，b ，c 的大小关系是 A ．a b c << B ．a c b <<C ．c a b <<D ．b c a <<【答案】B【解析】分析：分别判断出a ，b ，c 的大致范围，即可比较出它们的大小. 详解：0.3log 20a =<，0.121b =>，sin 789sin 6901c c ︒︒==⇒<<.b c a ∴>>.故选：B.点睛：(1)比较幂、对数的大小可以利用数形结合和引入中间量利用函数单调性两种方法． (2)解题时要根据实际情况来构造相应的函数，利用函数单调性进行比较，如果指数相同，而底数不同则构造幂函数，若底数相同而指数不同则构造指数函数，若引入中间量，一般选0或1. 6．已知函数在处取得最大值，则函数的图象A ．关于点对称 B ．关于点对称C ．关于直线对称D ．关于直线对称【答案】B 【解析】利用在处取得最大值，可以求得，再结合余弦型函数的图像判定. 【详解】因为函数在处取得最大值，所以，即.,令可得对称中心为，时，可得一个对称中心为，选项B 正确；令可得对称轴为，选项C,D 均错误，所以选B.【点睛】本题主要考查三角函数的图像和性质.利用整体代换的方法，可以求得对称中心和对称轴.7．已知不等式201x ax +<+的解集为(2,1)--，则二项式621ax x ⎛⎫- ⎪⎝⎭展开式的常数项是（） A ．15- B ．15 C ．5- D ．5【答案】B 【解析】∵不等式201x ax +<+的解集为()2,1--，11,1a a∴-=-∴= ．二项式662211ax x x x ⎛⎫⎛⎫-=- ⎪ ⎪⎝⎭⎝⎭的展开式式的通项公式为6316r rr T C x -+=，令630r -= ，求得2r = ，可得展开式的常数项是2615.C = 故选B ．8．如图所示的三视图表示的几何体的体积为323，则该几何体的外接球的表面积为A ．12πB ．24πC ．36πD ．48π【答案】C【解析】由三视图可得该几何体为底面边长为4m 、，一条侧棱垂直底面的四棱锥，设高为4，则13244,233m m ⨯⨯⨯∴=＝，将该几何体补成一个长方体，则其外接球半径为3R =，故这个几何体的外接球的表面积为24π36πR = ．故选C ．【点睛】本题考查了由三视图，求体积和表面积，其中根据已知的三视图，判断几何体的形状是解答的关键．属于中档题．9．被誉为“中国现代数学之父”的著名数学家华罗庚先生倡导的“0.618优选法”在生产和科研实践中得到了非常广泛的应用，0.618就是黄金分割比m =的近似值，黄金分割比还可以表示成2sin18︒=（）A ．4B 1C ．2D 1【答案】C【解析】由题意得m ＝2sin18°，∴4﹣m 2＝4cos 218°，利用诱导公式，二倍角的正弦函数公式化简，计算即可得解．【详解】由题意得m ＝2sin18°，∴4﹣m 2＝4﹣4sin 218°＝4（1﹣sin 218°）＝4cos 218°，∴22cos 271︒-＝2sin184sin18cos1821cos541sin 36︒︒︒︒==+-．故选：C ．【点睛】本题主要考查了同角三角函数基本关系式，诱导公式，二倍角的正弦函数公式在三角函数化简求值中的应用，属于基础题．10．已知点A 在抛物线()220y px p =>上，且A 为第一象限的点，过A 作y 轴的垂线，垂足为B ，F 为该抛物线的焦点，78pAF =，则直线BF 的斜率为（）A ．B ．C ．-1D ．-2【答案】B【解析】设()00,A x y ，由78p AF =，利用抛物线定义求得038p x =，进而得0y =进而tan BFO ∠=即可求解【详解】设()00,A x y ，因为78p AF =，所以0728p p x +=，解得038p x =，代入抛物线方程得0y =，所以OB =2p OF =，tan BFO ∠=BF 的斜率为故选：B 【点睛】本题考查抛物线的性质及定义，考查运算求解能力，是基础题.11．F 为双曲线22221x y a b-=(0,0)a b >>右焦点，,M N 为双曲线上的点，四边形OFMN 为平行四边形，且四边形OFMN 的面积为bc ，则双曲线的离心率为（）A ．2B ．CD【答案】B【解析】设00(,)M x y ，∵四边形OFMN 为平行四边形，∴02c x =， ∵四边形OFMN 的面积为bc ，∴0y c bc =，即0y b =，∴(,)2cM b ，代入双曲线方程得2114e -=，∵1e >，∴e = B.12．设函数()f x 是定义在(,0)-∞上的可导函数，其导函数为'()f x ，且有22()'()f x xf x x +>，则不等式2(2018)(2018)x f x ++4(2)0f -->的解集为（）A ．(2020,0)-B ．(,2020)-∞-C ．(2016,0)-D ．(,2016)-∞-【答案】B【解析】由()()22'f x xf x x +>，0x （＜），得：232xf x x f x x +'（）（）＜，即23[]0x f x x '（）＜＜，令F （x ）=x 2f （x ），则当0x ＜时，得0F x '（）＜，即0F x -∞（）在（，）上是减函数，2201820182018242F x x f x F f ∴+=++-=-（）（）（），（）（），即不等式等价为201820F x F +--（）（）＞， F x Q （）在0-∞（，）是减函数，∴由F 20182x F +-（）＞（）得，20182x +-＜，即2020.x -＜故选B ．【点评】本题主要考查利用导数研究函数的单调性以及抽象不等式的解法，其中利用一种条件合理构造函数，正确利用函数单调性和导数之间的关系是解决本题的关键二、填空题13．已知()f x 为偶函数，当0x <时，()x f x e x -=-，则(ln 2)f =__________．【答案】2ln2+【解析】由偶函数的性质直接求解即可【详解】()()()ln2ln2ln2ln22ln2f f e =-=--=+.故答案为2ln2+ 【点睛】本题考查函数的奇偶性，对数函数的运算，考查运算求解能力14．已知n S 是数列{}n a 的前n 项和，且()3log 11n S n +=+，则数列{}n a 的通项公式为_____．【答案】8,123,2n nn a n =⎧=⎨⨯≥⎩ 【解析】先根据对数的运算性质可得113n n S ++=，再通过1n n n a S S -=-求通项公式．【详解】解：()3log 11n S n +=+，113n n S +∴+=，当1n =时，119a +=，解得18a =，当2n ≥时，11313123n n n n n n a S S +-=-=--+=⨯，当1n =时，168a =≠，故8,123,2n nn a n =⎧=⎨⨯≥⎩．故答案为：8,123,2n nn a n =⎧=⎨⨯≥⎩．【点睛】本题考查通过数列的递推公式求通项公式，考查了运算能力和转化能力，属于基础题． 15．在直角梯形ABCD 中，//AD BC ，090,4,2ABC AB BC AD ∠====，则向量BDu u u r在向量AC u u u r 上的投影为_______. 【答案】2-【解析】建立平面直角坐标系，利用数量积投影的定义及坐标运算即可得到结果. 【详解】如图建立平面直角坐标系，易得：()()()()A 0,4B 0,0C 4,0D 2,4，，，∴()()442,4AC BD =-=u u u r u u u r ，，∴向量BD u u u v 在向量AC u u u v 上的投影为242BD AC AC==-u u u r u un ur u u u r 【点睛】平面向量的数量积计算问题，往往有两种形式，一是利用数量积的定义式，二是利用数量积的坐标运算公式，涉及几何图形的问题，先建立适当的平面直角坐标系，可起到化繁为简的妙用. 利用向量夹角公式、模公式及向量垂直的充要条件，可将有关角度问题、线段长问题及垂直问题转化为向量的数量积来解决．列出方程组求解未知数.16．已知四边形为矩形, ,为的中点,将沿折起,得到四棱锥,设的中点为,在翻折过程中,得到如下有三个命题:①平面，且的长度为定值；②三棱锥的最大体积为；③在翻折过程中，存在某个位置，使得.其中正确命题的序号为__________．（写出所有正确结论的序号）【答案】①②【解析】取的中点，连接、，证明四边形为平行四边形，得出，可判断出命题①的正误；由为的中点，可知三棱锥的体积为三棱锥的一半，并由平面平面，得出三棱锥体积的最大值，可判断出命题②的正误；取的中点，连接，由，结合得出平面，推出得出矛盾，可判断出命题③的正误.【详解】如下图所示：对于命题①，取的中点，连接、，则，，，由勾股定理得，易知，且，、分别为、的中点，所以，，四边形为平行四边形，，，平面，平面，平面，命题①正确；对于命题②，由为的中点，可知三棱锥的体积为三棱锥的一半，当平面平面时，三棱锥体积取最大值，取的中点，则，且，平面平面，平面平面，，平面，平面，的面积为，所以，三棱锥的体积的最大值为，则三棱锥的体积的最大值为，命题②正确；对于命题③，，为的中点，所以，，若，且，平面，由于平面，，事实上，易得，，，由勾股定理可得，这与矛盾，命题③错误.故答案为：①②. 【点睛】本题考查直线与平面平行、锥体体积的计算以及异面直线垂直的判定，判断这些命题时根据相关的判定定理以及性质定理，在计算三棱锥体积时，需要找到合适的底面与高来计算，考查空间想象能力，考查逻辑推理能力，属于难题.三、解答题17．在ABC ∆中，角A ，B ，C 所对的边分别为a ，b ，c ，且ABC ∆的面积为2sin sin sin B CA.（1）求a 的值；（2）若3A π=，求ABC ∆周长的最大值.【答案】（1）2a = （2）6 【解析】（1）由面积公式1sin 2ABC S ab C ∆=，利用正弦定理将角化边即可求出边a 的值；（2）由余弦定理及基本不等式可求周长的最大值. 【详解】解：（1）由题意可得12sin sin sin 2sin B C ab C A =，因为sin 0C ≠，所以12sin 2sin Bab A =，由正弦定理可得122bab a=，得2a =.（2）由余弦定理得2222cos a b c bc A =+-及3A π=，可得()()22223c 32b c a b c b b c +⎛⎫=+-≥+-⨯ ⎪⎝⎭()24b c +=，又2a =，所以4b c +≤，所以6a b c ++≤，当且仅当2b c ==时等号成立. 故ABC ∆周长的最大值是6. 【点睛】本题考查正弦定理，余弦定理及三角形面积公式解三角形，以及基本不等式的应用，属于中档题.18．如图，在四棱锥P ABCD -中，四边形ABCD 是直角梯形，AB AD ⊥，//AB CD ，PC ⊥底面ABCD ，224AB AD CD ===，2PC a =，E 是PB 的中点.（1）求证：AC ⊥平面PBC ；（2）若二面角P AC E --6，求直线PA 与平面EAC 所成角的正弦值. 【答案】（1）证明见解析（2）23【解析】（1）由线面垂直得到AC PC ⊥，再由勾股定理可证AC BC ⊥，即可得证；（2）建立空间直角坐标系，利用空间向量法由二面角P AC E --6，求出a ，再求线面角的正弦值. 【详解】解：（1）因为PC ⊥平面ABCD ，AC ⊂平面ABCD ，所以AC PC ⊥．因为4AB =，2AD CD ==，所以22AC BC ==．所以222AC BC AB +=，所以AC BC ⊥，又BC PC C ⋂=，BC ⊂平面PBC ，PC ⊂平面PBC ，所以AC ⊥平面PBC .（2）如图，以点C 为原点，平行于DA ，CD, CP 分别为x 轴，y 轴，z 轴正方向，建立空间直角坐标系，则()0,0,0C ，()2,2,0A ，()2,2,0B -．设()()0,0,20P a a >，则()1,1,E a -， ()2,2,0CA =u u u r ，()0,0,2CP a =u u u r ，()1,1,CE a =-u u u r，取()1,1,0m =-u r则0m CA m CP ⋅=⋅=u r u u u r u r u u u r ，m u r为面PAC 的法向量．设(),,n x y z =r 为面EAC 的法向量，则由0n CA n CE ⋅=⋅=r u u u r r u u u r ，即00x y x y az +=⎧⎨-+=⎩，取x a =，y a =-，2z =-，则(),,2n a a =--r ，依题意26cos ,32mn m n m n a ⋅<>===+u r r u r r u r r ，则2a =．于是()2,2,2n =--r ，()2,2,4PA =-u u u r．设直线PA 与平面EAC 所成角为θ，则2sin cos ,3PA n PA n PA nθ⋅=<>==u u u r r u u u r r u uu r r . 【点睛】本题考查线面垂直的判定，利用空间向量法求二面角及线面角，属于中档题.19．2018年1月26日，甘肃省人民政府办公厅发布《甘肃省关于餐饮业质量安全提升工程的实施意见》，卫生部对16所大学食堂的“进货渠道合格性”和“食品安全”进行量化评估.满10分者为“安全食堂”，评分7分以下的为“待改革食堂”.评分在4分以下考虑为“取缔食堂”，所有大学食堂的评分在7~10分之间，以下表格记录了它们的评分情况：（1）现从16所大学食堂中随机抽取3个，求至多有1个评分不低于9分的概率；（2）以这16所大学食堂评分数据估计大学食堂的经营性质，若从全国的大学食堂任选3个，记X 表示抽到评分不低于9分的食堂个数，求X 的分布列及数学期望. 【答案】（1）121140（2）见解析【解析】（1）根据题意，利用概率的求和公式，计算所求的概率值；（2）由题意知随机变量X的可能取值，计算对应的概率值，写出分布列，再计算数学期望值．【详解】解：（1）设i A 表示所抽取3个中有i 所大学食堂评分不低于9分，至多有1个评分不低于9分记为事件A ，则()()()3121241201331616121140C C C P A P A P A C C =+=+=. （2）由表格数据知，从16所大学食堂任选1个评分不低于9分的概率为41164=，由题知X 的可能取值为0，1，2，3()()3121332713270,14644464P X P X C ⎛⎫⎛⎫⎛⎫====== ⎪ ⎪ ⎪⎝⎭⎝⎭⎝⎭， ()()21323139312,34464464P X C P X ⎛⎫⎛⎫⎛⎫======⎪ ⎪ ⎪⎝⎭⎝⎭⎝⎭， ∴X 的分布列为∴()27911230.75646464E X =⨯+⨯+⨯=. 【点睛】求解该类问题，首先要正确理解题意，其次要准确无误的找出随机变量的所以可能值，计算出相应的概率，写出随机变量的分布列，正确运用均值、方差的公式进行计算，也就是要过三关：（1）阅读理解关；（2）概率计算关；（3）公式应用关.20．设椭圆2222:1(0)x y C a b a b +=>>的右焦点为1F ，离心率为22，过点1F 且与x 轴2 . （1）求椭圆C 的方程;（2）若24y a =上存在两点,M N ，椭圆C 上存在两个,P Q 点满足：1,,M N F 三点共线，1,,P Q F 三点共线，且PQ MN ⊥，求四边形PMQN 的面积的最小值.【答案】（1）2212x y +=；（2）【解析】【详解】分析：（1）由题意可知,a a ==及222a b c =+，即可求得a 和b 的值，求得椭圆的标准方程；（2）讨论直线MN 的斜率不存在，求得弦长，求得四边形的面积；当直线MN 的斜率存在时，设直线的方程为()1y x =-，联立方程组，运用韦达定理和弦长公式，以及四边形的面积公式，计算即可求得最小值.详解：（1）∵，∴22b a=，∵，∴c a =，又222a b c =+，解得a =1c =，1b =， ∴椭圆C 的方程为2212x y +=（2）（i ）当直线MN 的斜率不存在时，直线PQ 的斜率为0，此时4MN =，PQ =，PMQN S =四边形（ii ）当直线MN 的斜率存在时，设直线MN 的方程为()()10y k x k =-≠，联立24y x =，得()2222240(0)k x k x k -++=∆>，设,M N 的横坐标分别为,M N x x ，则242M N x x k +=+，∴244M N MN x x p k =++=+，由PQ MN ⊥可得直线PQ 的方程为()()110y x k k=--≠，联立椭圆C 的方程，消去y ，得()22224220(0)k x x k +-+-=∆>设,P Q 的横坐标为,P Q x x ，则24,2P Q x x k +=+ 22222P Q kx x k-=+∴PQ =)2212k k+=+)()2221122PMQNk S MN PQ k k+=⋅=+四边形，令()21(1)k t t +=>，则()()211PMQNS t t =-+四边形2111t ⎫==+>⎪-⎭，综上()minPMQNS =四边形点睛：本题主要考查椭圆的标准方程与几何性质、直线与圆锥曲线的位置关系的应用问题,解答此类题目，通常利用,,,a b c e 的关系，确定椭圆（圆锥曲线）方程是基础，通过联立直线方程与椭圆（圆锥曲线）方程的方程组，应用一元二次方程根与系数的关系，得到“目标函数”的解析式，确定函数的性质进行求解，此类问题易错点是复杂式子的变形能力不足，导致错漏百出，本题能较好的考查考生的逻辑思维能力、运算求解能力、分析问题解决问题的能力等.21．已知函数()()()2ln 2x a f x x a R +=+∈的导函数为()'f x .（1）若曲线()y f x =在1x =处的切线与直线310x y ++=垂直，求a 的值；（2）若()'f x 的两个零点从小到大依次为1x ，2x ，证明：()122x f x >. 【答案】（1）1a = （2）证明见解析【解析】（1）求出()f x 的导函数，由直线310x y ++=的斜率为13-，可得()'13f =-，即可求出参数的值；（2）由()()21'0x ax f x x x++=>则()'f x 的零点即210x ax ++=的两根，所以12x x a +=-，121=x x ，又1>0x ，20x >，12x x <，所以1201x x <<<且221a x x =--，欲证()122x f x >，只需证()2112f x x >，构造函数，利用导数说明其单调性即可得证. 【详解】解：（1）因为()()()2ln 02x a f x x x +=+>，所以()()1'0f x x a x x=++>. 因为直线310x y ++=的斜率为13-，曲线()y f x =在1x =处的切线与直线310x y ++=垂直，所以()1'113f ⎛⎫⨯-=- ⎪⎝⎭，即113a ++=，所以1a =.（2）因为()()21'0x ax f x x x++=>，且()'f x 的两个零点从小到大依次为1x ，2x ，所以1x ，2x 是方程210x ax ++=的两个根，所以12x x a +=-，121=x x ，又1>0x ，20x >，12x x <，所以1201x x <<<且221a x x =--，欲证()122x f x >，只需证()2112f x x >，而()()2222221221ln 12ln 12x a x f x x x x x x ++==+，令()()1ln 12x g x x x x =+>，则()2'1ln 102x xg x =-++>，所以()g x 在()1,+∞上单调递增，()121g =Q 所以()12g x >，所以()122xf x >成立.【点睛】本题考查利用导数研究函数的单调性，极值，属于中档题.22．在平面直角坐标系xoy 中，曲线1C 的参数方程为cos sin x a y b ϕϕ=⎧⎨=⎩（0,a b ϕ>>为参数),在以O 为极点，x 轴的正半轴为极轴的极坐标系中，曲线2C 是圆心在极轴上，且经过极点的圆.已知曲线1C上的点(1,2M 对应的参数3πϕ=，射线3πθ=与曲线2C 交于点(1,)3D π（1）求曲线1C 、2C 的直角坐标方程；（2）若点,A B 在曲线1C 上的两个点且OA OB ⊥，求2211OAOB+的值.【答案】（1）2214x y +=，22(1)1x y -+=；（2）54 【解析】分析：（1）将M 及对应的参数3πϕ=，代入cos sin x a y b ϕϕ=⎧⎨=⎩，解得,a b ，即可得出曲线1C 的直角坐标方程，由于曲线2C 是圆心在极轴上，且过极点的圆，将点(1,)3D π代入2cos R ρθ=，即可求解曲线2C 的方程；（2）设12(,),(,)2A B πρθρθ+在曲线1C 上，求得21ρ和22ρ，即可求解2211OAOB+的值.详解：（1）将M ⎛ ⎝⎭及对应的参数3πϕ=，代入x acos y bsin ϕϕ=⎧⎨=⎩，得1323acos bsin ππ⎧=⎪⎪=⎪⎩，即21a b =⎧⎨=⎩，所以曲线1C 的方程为2x cos y sin ϕϕ=⎧⎨=⎩ ϕ为参数，即2214x y +=.设圆2C 的半径为R ，由题意，圆2C 的极坐标方程为2cos R ρθ=.（或()222x R y R -+=）将点1,3D π⎛⎫⎪⎝⎭代入2cos R ρθ=，得12cos 3R π=，即1R = 所以曲线2C 的极坐标方程为2cos ρθ=，即()2211x y -+= （2）设()12,,,2A B πρθρθ⎛⎫+⎪⎝⎭在曲线1C 上，所以222211cos sin 14ρθρθ+=，222222sin cos 14ρθρθ+=，所以222222121111cos sin 4OAOBθθρρ⎛⎫+=+=+ ⎪⎝⎭ 22sin 5cos 44θθ⎛⎫++= ⎪⎝⎭点睛：本题主要考查了椭圆的参数方程，极坐标方程与直角坐标方程，以及圆的极坐标与直角坐标方程的互化，以及直线极坐标方程的应用，着重考查了推理与运算能力，属于基础题.23．己知0a >，函数()f x x a =-.（1）若2a =，解不等式()()35f x f x ++≤；（2）若函数()()()2g x f x f x a =-+，且存在0x R ∈使得()202g x a a ≥-成立，求实数a 的取值范围.【答案】（1）{}|23x x -≤≤；（2）(0,4]【解析】（1）零点分段解不等式即可（2）等价于()2max 2g x a c ≥-，由2x a x a x a x a a --+≤---=，得不等式即可求解【详解】（1）当2a =时，()()12,13213,1221,2x x f x f x x x x x x -<-⎧⎪++=-++=-≤<⎨⎪-≥⎩，当1x <-时，由125x -≤，解得21x -≤<-；当12x -≤<时，由35≤，解得12x -≤<；当2x ≥时，由215x -≤，解得23x ≤≤. 综上可知，原不等式的解集为{}|23x x -≤≤. （2）()()()2g x f x f x a x a x a =-+=--+.存在0x R ∈使得()202g x a a ≥-成立，等价于()2max 2g x a a ≥-.又因为2x a x a x a x a a --+≤---=，所以222a a a ≥-，即240a a -≤. 解得04a ≤≤，结合0a >，所以实数a 的取值范围为(]0,4. 【点睛】本题考查绝对值不等式的解法，考查不等式恒成立及最值，考查转化思想，是中档题。

2021年甘肃省河西五市部分普通高中高三第一次联考英语试卷

2021年甘肃省河西五市部分普通高中高三第一次联考英语试卷学校:___________姓名：___________班级：___________考号：___________一、阅读选择My daughter Alisa was born blind in her right eye and was bullied (欺侮) pretty severely in school. So I quitted my job as a babysitter and then schooled my daughter heart and soul at home.A year ago a boy of 14 befriended my daughter on Facebook after reading something Alisa wrote about bullying. Today he messaged her and asked if she would like six tickets to a Colorado Rockies baseball game. They have neve r met in person but she said, “Sure! That would be great.”Then I received a call from his mother explaining why her son had chosen my daughter. She said he thought my daughter deserved them because of all the good she did in the community. Her son, she explained, had experienced a similar situation and was also home schooled. What she said is true. Now my daughter Alisa continues to teach groups of girls in trouble in our community how to look within themselves for the positive and how to be their own person.Everything taken into consideration, we decided to meet the mother and the boy at a local bike shop. After meeting, the boy approached my car and my daughter gave him a hug and thanked him for his generosity. She told him that she had never been to a baseball game and that she was going to take her entire family, including myself, her dad, little sister, her cousin and an aunt who has brain cancer.We all thanked one another, got in our car, and went our way. As we drove home my daughter opened the envelope. Inside it were the tickets and ＄100 each to buy hot dogs, pay for parking and not have any worries but a great time.My daughter has always been the giver and now she and our family are the receivers and I can not tell you how incredibly honored we feel to be on the other end. What an incredible young man to have such a kind idea.1．What did the author once do according to the passage?A．She was a ticket seller.B．She was a school teacher.C．She was a babysitter.D．She was a social worker.2．How did t he boy get to know the author’s daughter?A．They met when buying tickets to a baseball game.B．They got in touch via the Internet.C．They became familiar when talking face to face.D．They went to the same school and met each other.3．Why did the boy want to offer free tickets to Alisa?A．Because Alisa is a disabled girl.B．Because he has a lot money to share.C．Because Alisa often helps those in trouble.D．Because he has a similar situation with Alisa.4．Which of the following best describes the passage?A．Good is rewarded with good.B．A friend in need is a friend indeed.C．Two heads are better than one.D．Where there is a will, there is a way.Electricity bills can be highly expensive and the power we consume comes at an even greater cost to the environment when you consider that over 85% of the electricity produced in the United States comes from fuels. Whether you’re concerned about cleaning up the environment or you simply want to reduce your electricity bill，residential wind power generators（发电机）could be a solution.Producing wind power at home will not work for everyone. If you live in a over-populated residential area，there may be certain laws and zoning requirements that prohibit the use of windmills（风车）.If you live on 1 acre of land or more,you proba bly won’t have any issues but you should investigate carefully to make sure that wind power generators are both legal and practical where you live. Even if there are no laws or regulations prohibiting wind power generators you still need to be in a location that gets enough wind on a regular basis.Some producers of wind generators recommend that you live in an area with wind speeds that average at least 10 mph. Newer models have been developed recently that can operate with wind speeds as low as 4 mph but maximum efficiency is achieved at higher wind speeds.Before you fix a wind powered system,you will have to determine your power requirements. Will you be using it to charge a small battery for a boat or vehicle or will you need enough power to run your entire household and be completely off the grid（电网）？Once you know what your power requirements are，you can start shopping around for a system that can meet those needs.Wind power generators are a great solution for a lot of people.They’re an ideal solution for remote locations where it would be impractical or simply too expensive to tap into thegrid.They are quiet and totally clean，producing no pollution. They require no fuel and very little maintenance. Residential wind power offers a lot of benefits but i t’s not for everyone. You’ll have to have some money up front to pay for the system and equipment;however,you could save quite a bit of money if you’re able to do much of the work yourself. You’ll also need to live in an area that gets enough wind to make the equipment worthwhile. You’ll need to do your homework before you make a purchase,but wind power generators could be a great solution for producing clean, low-cost energy.5．What is the main idea of the first paragraph？A．Electricity bills can be highly expensive.B．Most of the electricity in the US comes from fuels.C．Generating electricity does harm to the environment.D．Residential wind power generators are useful and necessary.6．What can we infer from the passage？A．wind power generators enjoy a lot of benefits.B．you can place wind power generators wherever you want.C．wind power generators are affordable to most families.D．wind power generators are an ideal solution for everyone.7．What attitude might the writer hold towards residential wind power generators？A．Negative B．SupportiveC．Skeptical D．Cautious8．What is the best title for the passage？A．Ways of Fully Using Wind PowerB．How to Reduce Your Electricity BillC．Alternative Solution-Wind PowerD．Function of Wind Power GeneratorsThe Winter Olympic Games are a major international sporting event that occurs once every four years. Unlike the Summer Olympics, the Winter Olympics feature sports practiced on snow and ice. The first Winter Olympics, the 1924 Winter Olympics, was held in Chamonix, France. The Games were held every four years from 1924 until 1936, after which they were interrupted by World War II. The Olympics resumed in 1948 and was again held every four years. Until 1992, the Winter and Summer Olympic Games were held in the same year.The Winter Games have evolved since its beginning. Sports and disciplines have been added and some of them, such as short track speed skating, freestyle skiing, have earned a permanent spot on the Olympic program. Others have been discontinued and later reintroduced. Still others, such as speed skiing, bandy and skijoring, were demonstration sports but never incorporated(合并)as Olympic sports. The rise of television as a global medium for communicationenhancedthe impression of the Games. It created an income stream, via the sale of broadcast rights and advertising.This allowed outside interests, such as television companies and corporate sponsors.Beijing has become the first city to host both Summer and Winter Olympic Games after beating Kazakhstan’s Alma ty to hold the 2022 Winter Olympics. With a fully-prepared final presentation by an all-star team, Beijing has successfully convinced the committee members that the 2008 Olympics host city is a more favored candidate for the Winter Games. Beijing was the safe choice because it had already proved it could stage the Games and said it would take winter sports into the backyard of the world’s most populated country.9．Why were the Winter Olympic Games not held for 12 years ?A．Because of the economic crisisB．Because of culture differenceC．Because of the Second World WarD．Because of countries’ lack of interest10．Which of the following is a sports event of the Winter Games ?A．Speed skiing B．Freestyle skiingC．Bandy D．Skijoring11．What does the underlined word “ enhanced” in paragraph two mean?A．Improved B．Reduced C．Paused D．Balanced 12．Beijing won the right to host the 2022 Winter Olympic Games mainly due to______.A．its rich experienceB．its large populationC．its safetyD．its ability to stage the GamesHave you ever picked a job based on the fact that you were good at it but later found it made you feel very uncomfortable over time? When you select your career, there’s whole lot more to it than assessing your skills and matching them with a particular position. If you ignore your personality, it will hurt you long-term regardless of your skills or the job’s pay. There are several areas of your personality that you need to consider to help you find a good job. Here area few of those main areas:1) Do you prefer working alone or with other people?There are isolating jobs that will drive an outgoing person crazy and also interactive jobs that will make a shy person uneasy. Most people are not extremes in either direction but do have a tendency that they prefer. There are also positions that are sometimes a combination of the two, which may be best for someone in the middle who adapts easily to either situation.2) How do you handle change?Most jobs these days have some elements of change to them, but some are more than others. If you needstability in your life, you may need a job where the changes don’t happen so often. Other people would be bored of the same daily routine.3) Do you enjoy working with computers？I do see this as a kind of personality characteristic. There are people who are happy to spend more than 40 hours a week on a computer, while there are others who need a lot of human interaction throughout the day. Again, these are extremes and you’ll likely find a lot of positions somewhere in the middle as well.4) What type of work environment do you enjoy？This can range from being in a large building with a lot of people you won’t know immediately to a smaller setting where you'll get to know almost all the people there fairly quickly.5) How do you like to get paid?Some people are motivated by the pay they get, while others feel too stressed to be like that. The variety of payment designs in the sales industry is a typical example for this. Anyway, these are a great starting point for you. I’ve seen it over and over again with peoplethat they make more money over time when they do something they love. It may take you a little longer, but making a move to do what you have a passion for can change the course of your life for the better.13．What does the underlined sentence in paragraph one mean?A．Before you select your job, you should assess your skills and match them with your position. B．There are more important things than assessing skills and match them with the position when you select jobs.C．Nothing is important than assessing skills and match them with the position when you select job.D．You should ignore your skills when you select job.14．In a job search, what quality is not mentioned in the passage?A．Outgoing. B．Motivated.C．Cooperative. D．Passionate.15．What could be the best title for this passage?A．Lifestyles and Job PayB．Jobs and EnvironmentC．Job Skills and AbilitiesD．Personalities and Jobs二、七选五Beijing plans to guarantee quality air by cutting emissions caused by industrial production and vehicles when it stages military parade marking the 70th anniversary of the end of World War II on Sept 3.16．17．And the aim is to reduce the use of such vehicles by 35 percent , the municipal(市政的) traffic committee said on Monday . All vehicles transporting construction waste and dangerous chemicals will be barred from the capital’s roads during the period but the restriction will not apply to buses, taxis and other vehicles such as police cars.Additionally, production will be delayed at polluting industries and construction sites from Aug.22 to Sept. 4.18．.The city will also shut down or limit production at some factories to further reduce emissions.The measures will ensure air quality for the 2015 IAAF World Athletics Championships in the capital from Aug. 22to 30.19．20．Thanks to the tough measures air quality in the region was greatly improved, leadingChinese netizens to coin the phrase “APEC blue “to describe the sky during the week in Beijing.Air quality in 74 cities across the country has generally improved in the first half of the year, with days of clear air accounting for 68 percent points year on year, the Ministry of EnvironmentalProtection said in late July.A．Work will also be delayed at all construction sites and on demolition (破坏) projection. B．Air quality across the country has generally improved in the first half of the year. C．Measures the government has taken is to serve the interest of all the people.D．Beijing took similar measures during the Asia—Pacific Economic Cooperation Summit. E.It is important to be commemorated (成为…的纪念) to reflect on the past and look for the futureF.From Aug. 22 to Sept 3.,the city will restrict the use of private vehiclesG.And so it is with celebrations marking the anniversary of victory in World War II on Sept. 3三、完形填空完形填空阅读下面短文，从短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项。

甘肃省河西五市部分普通高中2020┄2021届高三1月第一次联考英语试卷

英语试卷第I 卷第一部分阅读理解（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。

AMy daughter Alisa was born blind in her right eye and was bullied （欺侮） pretty severely in school. So I quitted my job as a babysitter and then schooled my daughter heart and soul at home.A year ago a boy of 14 befriended my daughter on Facebook after reading something Alisa wrote about bullying. Today he messaged her and asked if she would like six tickets to a Colorado Rockies baseball game. They have never met in person but she said, “Sure! That would be great.”Then I received a call from his mother explaining why her son had chosen my daughter. She said he thought my daughter deserved them because of all the good she did in the community. Her son, she explained, had experienced a similar situation and was also home schooled.What she said is true. Now my daughter Alisa continues to teach groups of girls in trouble in our community how to look within themselves for the positive and how to be their own person.Everything taken into consideration, we decided to meet the mother and the boy at a local bike shop. After meeting, the boy approached my car and my daughter gave him a hug andthanked him for his generosity. She told him that she had never been to a baseball game and that she was going to take her entire family, including myself, her dad, little sister, her cousin and an aunt who has brain cancer.We all thanked one another, got in our car, and went our way. As we drove home my daughter opened the envelope. Inside it were the tickets and ＄100 each to buy hot dogs, pay for parking and not have any worries but a great time.My daughter has always been the giver and now she and our family are the receivers and I can not tell you how incredibly honored we feel to be on the other end. What an incredible young man to have such a kind idea.1. What did the author once do according to the passage？A. She was a ticket seller.B. She was a school teacher.C. She was a babysitter.D. She was a social worker.2. How did the boy get to know the author’s daughter？A. They met when buying tickets to a baseball game.B. They got in touch via the Internet.C. They became familiar when talking face to face.D. They went to the same school and met each other.3. Why did the boy want to offer free tickets to Alisa？A. Because Alisa is a disabled girl.B. Because he has a lot money to share.C. Because Alisa often helps those in trouble.D. Because he has a similar situation with Alisa.4. Which of the following best describes the passage？A. Good is rewarded with good.B. A friend in need is a friend indeed.C. Two heads are better than one.D. Where there is a will, there is a way.BElectricity bills can be highly expensive and the power we consume comes at an even greater cost to the environment when you consider that over 85% of the electricity produced in the United States comes from fuels. Whether you’re concerned about cleaning up the environment or you simply want to reduce your electricity bill，residential wind power generators（发电机）could be a solution.Producing wind power at home will not work for everyone. If you live in a over-populated residential area，there may be certain laws and zoning requirements that prohibit the use of windmills（风车）.If you live on 1 acre of land or more,you probably won’t have any issues but you should investigate carefully to make sure that wind power generators are both legal and practical where you live. Even if there are no laws or regulations prohibiting wind power generators you still need to be in a location that gets enough wind on a regular basis.Some producers of wind generators recommend that you live in an area with wind speeds that average at least 10 mph. Newer models have been developed recently that can operate with wind speeds as low as 4 mph but maximum efficiency is achieved at higher wind speeds. Before you fix a wind powered system,you will have to determine your power requirements. Will you be using it to charge a small battery for a boat or vehicle or will you need enough power to run your entire household and be completely off the grid（电网）？Once you knowwhat your power requirements are，you can start shopping around for a system that can meet those needs.Wind power generators are a great solution for a lot o f people.They’re an ideal solution for remote locations where it would be impractical or simply too expensive to tap into the grid.They are quiet and totally clean，producing no pollution. They require no fuel and very little maintenance. Residential wind p ower offers a lot of benefits but it’s not for everyone. You’ll have to have some money up front to pay for the system and equipment;however,you could save quite a bit of money if you’re able to do much of the work yourself. You’ll also need to live in an area that gets enough wind to make the equipment worthwhile. You’ll need to do your homework before you make a purchase,but wind power generators could be a great solution for producing clean, low-cost energy.5. What is the main idea of the first paragraph？A. Electricity bills can be highly expensive.B. Most of the electricity in the US comes from fuels.C. Generating electricity does harm to the environment.D. Residential wind power generators are useful and necessary.6. What can we infer from the passage？A. wind power generators enjoy a lot of benefits.B. you can place wind power generators wherever you want.C. wind power generators are affordable to most families.D. wind power generators are an ideal solution for everyone.7. What attitude might the writer hold towards residential wind power generators？A. NegativeB. SupportiveC. SkepticalD. Cautious8. What is the best title for the passage？A. Ways of Fully Using Wind PowerB. How to Reduce Your Electricity BillC. Alternative Solution-Wind PowerD. Function of Wind Power GeneratorsCThe Winter Olympic Games are a major international sporting event that occurs once every four years. Unlike the Summer Olympics, the Winter Olympics feature sports practiced on snow and ice. The first Winter Olympics, the 1924 Winter Olympics, was held in Chamonix, France. The Games were held every four years from 1924 until 1936, after which they were interrupted by World War II. The Olympics resumed in 1948 and was again held every four years. Until 1992, the Winter and Summer Olympic Games were held in the same year.The Winter Games have evolved since its beginning. Sports and disciplines have been added and some of them, such as short track speed skating, freestyle skiing, have earned a permanent spot on the Olympic program. Others have been discontinued and later reintroduced. Still others, such as speed skiing, bandy and skijoring, were demonstration sports but never incorporated（合并）as Olympic sports. The rise of television as a global medium forsale of broadcast rights and advertising.This allowed outside interests, such as television companies and corporate sponsors.。

甘肃省河西五市部分普通高中届高三上学期第一次联合考试(1月)

甘肃省河西五市部分普通高中届高三上学期第一次联合考试（1月）试卷说明：甘肃省河西五市部分普通高中高三第一次联合考试语文试卷命题学校:嘉峪关市酒钢三中命题人：周正辉王有明王增平本试卷分第Ⅰ卷（阅读题）和第Ⅱ卷（表达题）两部分。

考生作答时，将答案写在答题卡上，在本试卷上答题无效。

考试结束后，将答题卡交回。

第Ⅰ卷阅读题甲必考题车千秋，本姓田氏，其先齐诸田徙长陵。

千秋为高寝郎。

会卫太子为江充所谮败，久之，千秋上急变讼太子冤，曰：“子弄父兵，罪当笞；天子之子过误杀人，当何罪哉！臣尝梦见一白头翁教臣言。

”是时，上颇知太子惶恐无他意，乃大感寤，召见千秋。

谓曰：“父子之间，人所难言也，公独明其不然。

此高庙神灵使公教我，公当遂为吾辅佐。

”立拜千秋为大鸿胪。

数月，遂代刘屈?为丞相，封富民侯。

千秋无他材能术学，又无伐阅功劳，特以一言寤意，旬月取丞相封侯，世未尝有也。

千秋为人敦厚有智，居位自称，逾于前后数公。

初，千秋始视事，见上比年治太子狱，诛罚尤多，群下恐惧，思欲宽广上意，尉安众庶。

乃与御史、中二千石共上寿颂德美，劝上施恩惠，缓刑罚，玩听音乐，养志和神，为天下自虞乐。

上报曰：“朕之不德，自左丞相与贰师阴谋逆乱，巫蛊之祸流及士大夫。

朕日一食者累月，乃何乐之听？痛士大夫常在心，既事不咎。

虽然，巫蛊始发，诏丞相、御史督二千石求捕，廷尉治，未闻九卿、廷尉有所鞫也。

曩者，江充先治甘泉宫人，转至未央椒房，以及敬声之畴、李禹之属谋人匈奴，有司无所发，令丞相亲掘兰台蛊验，所明知也。

至今余巫颇脱不止，阴贼侵身，远近为蛊，朕愧之甚，何寿之有？敬不举君之觞！谨谢丞相、二千石各就馆。

书曰：‘毋偏毋dang，王道荡荡。

’毋有复言。

”后岁余，武帝疾，立皇子钩弋夫人男为太子，拜大将军霍光、车骑将军金日?、御史大夫桑弘羊及丞相千秋，并受遗诏，辅道少主。

武帝崩，昭帝初即位，未任听政，政事一决大将军光。

千秋居丞相位，谨厚有重德。

每公卿朝会，光谓千秋曰：“始与君侯俱受先帝遗诏，今光治内，君侯治外，宜有以教督，使光毋负天下。

2021届甘肃省河西五市部分普通高中高三上第一次联考化学试卷

【最新】甘肃省河西五市部分普通高中高三上第一次联考化学试卷学校:___________姓名：___________班级：___________考号：___________一、单选题1．化学与科技､社会､生活有着密切的联系，下列有关说法正确的是（）A．可吸入颗粒物中含有的铅､镉､铬､钒､砷等对人体有害的元素均为金属元素B．乙醇和汽油都是可再生能源，应大力推广乙醇汽油的使用C．单质硅晶体是将太阳能转化为电能的常用材料D．新型能源生物柴油和矿物油的主要化学成分相同2．下列叙述正确的是（）A．石油裂化主要得到乙烯B．石油分馏是化学变化，可得到汽油、煤油等C．煤的干馏主要得到煤焦油、焦炉气、焦炭、粗氨水D．煤的气化和液化是物理变化，是使煤变成清洁能源的有效途径3．下列有关化学用语表示正确的是（）A．乙烯的结构简式为C2H4B．质子数为53，中子数为78的碘原子：53131IC．S2﹣的结构示意图：D．NH4Cl的电子式为4．下列有关说法中不正确的是（）A．将SO2通入BaCl2溶液中至饱和，无沉淀产生，再通入过量NH3，产生沉淀B．二氧化硫可广泛用于食品的增白C．用AlCl3溶液制取Al（OH）3，沉淀剂选用氨水比选用NaOH溶液好D．纯锌与稀硫酸反应产生氢气的速率较慢，再加入少量CuSO4固体，反应速率加快5．下列反应的离子方程式正确的是（）A．NaHSO4溶液与足量Ba（OH）2溶液混合：2H++SO42﹣+Ba2++2OH﹣═BaSO4↓+2H2OB．硫化钠的水解反应：S2﹣+2H2O⇌H2S+2OH﹣C．将等体积等物质的量浓度的NaHCO3溶液与Ba（OH）2溶液混合：HCO3﹣+Ba2++OH﹣═BaCO3↓+H2OD．单质铜与稀硝酸反应：Cu+2H++2NO3﹣═Cu2++2NO↑+H2O6．下列判断不合理的是（）A．能电离出H+的物质不一定是酸B．蔗糖、碳酸钡和水分别属于非电解质、强电解质和弱电解质C．根据分散系中分散质粒子直径大小将分散系分为溶液、胶体和浊液D．焰色反应是化学变化7．下列有关结构和性质的说法中不正确的是（）A．元素周期表中从ⅢB族到ⅡB族十个纵行的元素都是金属元素B．碱性：NaOH＞NH3•H2O，所以元素的金属性：Na＞NC．同周期第ⅡA族与第ⅢA族的元素原子序数之差不一定为1D．第ⅦA族元素从上到下，其氢化物的稳定性逐渐减弱8．下列叙述正确的是（）①淀粉和纤维素互为同分异构体②麦芽糖与蔗糖的水解产物均含葡萄糖，故二者均为还原型二糖③乙烯和苯都能使溴水褪色，褪色的原理相同④乙醇、乙酸、乙酸乙酯都能发生取代反应⑤食品保鲜膜、一次性食品袋的主要成分是聚氯乙烯⑥除去乙烷中混有的乙烯可用酸性高锰酸钾溶液⑦（CH3）2CHC（CH3）3名称为：2，3，3﹣三甲基丁烷⑧淀粉、油脂、蛋白质在一定条件下都能发生水解反应．A．①②④⑧ B．②④⑤⑧ C．③④⑥⑦ D．④⑧9．设N A为阿伏加德罗常数的值，下列说法正确是（）A．25℃时，pH=12的Ba（OH）2溶液中含有的OH﹣数目为0.01 N AB．9gH218O含有的中子数为5N AC．常温常压下，28gC2H4、C3H6的混合气体中含有碳原子的数目为2N AD．分子数为N A的CO、N2混合气体体积约为22.4L，质量为28g10．实验法和比较法是研究物质性质的基本方法．以下实验设计中，不合理或不严密的是（）A．钠和镁分别与冷水反应，判断钠和镁金属性强弱B．测定相同温度下盐酸和醋酸溶液的pH，就可证明盐酸是强酸、醋酸是弱酸C．铁分别与氯气和硫反应，判断氯气与硫的氧化性强弱D．测定相同条件下Na2CO3溶液和Na2SO4溶液的pH，判断碳与硫的非金属性强弱11．工业上制备纯硅反应的热化学方程式如下：SiCl4(g)+2H2(g)Si(s)+4HCl(g)；ΔH=+QkJ·mol-1(Q＞0)，某温度、压强下，将一定量反应物通入密闭容器进行以上反应，下列叙述正确的是（）A．反应过程中，若增大压强能提高SiCl4的转化率B．若反应开始时SiCl4为1mol，则达平衡时，吸收热量为QkJC．反应至4min时，若HCl浓度为0.12mol·L-1，则H2反应速率为0.03mol·L-1·min-1 D．当反应吸收热量为0.025QkJ时，生成的HCl通入100mL1mol·L-1的NaOH溶液恰好反应12．已知X、Y、Z、W、T是短周期中原子序数依次增大的5种主族元素．其中Y和X 两种元素可以组成1：1、1：2、1：3、1：4等多种化合物；Z原子最外层电子数是次外层电子数的3倍，W与X同主族，W与T形成的化合物WT是厨房必需的调味品，下列说法正确的是（）A．原子半径：T＞W＞Z＞YB．W与T的单质可通过电解饱和的WT水溶液获得C．Z与W形成的两种化合物中化学键类型完全相同D．元素X、Z与T可形成多种酸13．下列叙述正确的是（）A．常温下，pH＝5的CH3COOH溶液和pH＝5的NH4Cl溶液中，水的电离程度相同B．常温下，反应C(s)＋CO2(g)＝2CO(g)不能自发进行，则该反应的ΔH<0C．常温下，将pH =10的氨水稀释，溶液中所有离子浓度都减小D．常温下，在Mg(OH)2的悬浊液中加入少量的NH4Cl固体，c(Mg2+)增大14．用Pt电极电解含有Ag+、Cu2+和X3+各0.1mol的溶液，阴极析出固体物质的质量m （g）与回路中通过电子的物质的量n（mol）的关系如图所示．则下列氧化性强弱的判断正确的是（）A．Ag+＞X3+＞Cu2+＞H+＞X2+ B．Ag+＞Cu2+＞X3+＞H+＞X2+C．Cu2+＞X3+＞Ag+＞X2+＞H+ D．Cu2+＞Ag+＞X3+＞H+＞X2+15．下列判断中，正确的是( )A ．已知25 ℃时NH 4CN 显碱性，则25 ℃时的电离常数K （NH 3·H 2O ）＞K （HCN ）B ．25 ℃时，Mg （OH ）2固体在20mL0.01 mol ·L －1氨水中的K sp 比在20 mL0.01 mol ·L －1 NH 4Cl 溶液中的K sp 小C ．pH 试纸测得新制氯水的pH 为4D ．FeCl 3溶液和Fe 2（SO 4）3溶液加热蒸干．灼烧都得到Fe 2O 316．短周期元素X 、Y 、Z 、W 在元素周期表中的相对位置如图所示，其中W 原子的质子数是其最外层电子数的三倍，下列说法不正确的是（）A ．原子半径：W ＞Z ＞Y ＞XB ．最高价氧化物对应水化物的酸性：X ＞W ＞ZC ．最简单气态氢化物的热稳定性：Y ＞X ＞W ＞ZD ．元素X 、Z 、W 的最高化合价分别与其主族序数相等17．一定温度下，在2 L 的密闭容器中，X 、Y 、Z 三种气体的物质的量随时间变化的曲线如下图所示：下列描述正确的是A ．反应的化学方程式为：X （g ）+Y （g ）Z （g ）B ．反应开始到10s ，X 的物质的量浓度减少了0.79mol/LC ．反应开始到10s 时，Y 的转化率为79.0％D ．反应开始到10s ，用Z 表示的反应速率为0.158mol/(L·s)18．已知甲为恒压容器、乙为恒容容器。

2020年1月甘肃省高三联考文科数学试题(文科)

2020年1月甘肃省河西五市部分普通高中高三第一次联合考试数学试卷(文科)嘉峪关市酒钢三中命题人：杨林世赵雪艳刘霞审题人：周兴存第Ⅰ卷（选择题，共60分）一、选择题：本大题共12小题，每小题5分，满分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．已知集合{}|42M x x =-<<，{}2|60N x x x =--<，则MN =（）A ．{}|43x x -<<B ．{}|42x x -<<-C ．{}|22x x -<<D ．{}|23x x <<2．已知角α的终边经过点(-，则sin α的值为（）A ．B ．C ．12-D ．-23．已知21,e e 为单位向量，且满足0)2(221=⋅+e e e ，则21,e e 的夹角为（） A ．30B ．60︒C ．120︒D ．150︒4．《周髀算经》是我国古代的天文学和数学著作．其中有一个问题大意为：一年有二十四个节气，每个节气晷长损益相同(即太阳照射物体影子的长度增加和减少大小相同)．二十四个节气及晷长变化如图所示，若冬至晷长一丈三尺五寸，夏至晷长一尺五寸(注：一丈等于十尺，一尺等于十寸)，则夏至后的那个节气(小暑)晷长为( )A ．五寸B ．二尺五寸C ．三尺五寸D ．四尺五寸5．,再把图像上各点的横坐标扩大到原来的2倍(纵坐标不变)，则所得图像的解析式为（）A C D 6．已知函数2()2cos f x x x =+，()f x '是()f x 的导函数，则函数()y f x '=的图像大致为（）A ．B ．C ．D ．7．等比数列{}n a 中，10a >，则“13a a <”是“34a a <”的（） A ．充分不必要条件 B ．必要不充分条件C ．充要条件D ．既不充分也不必要条件8．若m ，n 是两条不同的直线，α，β是两个不同的平面，则下列命题正确的是（） A ．若m α⊥，n β⊥，αβ⊥，则//m n B ．若m α⊥，n β∥，αβ∥，则m n ⊥ C ．若m α∥，n β⊥，αβ⊥，则m n ⊥ D ．若m α∥，n β∥，αβ∥，则//m n9．已知2a =112b⎛⎫> ⎪⎝⎭，12log 1c >，则（） A ．a b c >> B ．c a b >>C ．c b a >>D ．a c b >>10．已知21,F F 为双曲线)0,0(1:2222>>=-b a by a x C 的左、右焦点，直线x y 3=与双曲线C 的一个交点P 在以线段21F F 为直径的圆上，则双曲线C 的离心率为（） A ．324+ B ．525+ C ．13+ D ．23+ 11．已知b a ,为正实数，直线2+-=a x y 与曲线1-=+bx ey 相切，则ba 11+的最小值为( )A ．1B ．2C ．4D ．812．设函数21,0(),0x e x f x x ax x ⎧-≤=⎨->⎩，若关于x 的方程()0f x m +=对任意的(0,1)m ∈有三个不相等的实数根，则a 的取值范围是（） A ．(,2]-∞-B ． (,2][2,)-∞-+∞C ．[2,2]-D ．[2,)+∞第Ⅱ卷（非选择题，共90分）二、填空题：本大题共4小题，每小题5分，满分20分.13．设y x ,满足约束条件⎪⎩⎪⎨⎧≥--≤+-≤-+05301307y x y x y x ，则y x z -=2的最大值为______．14．已知向量)sin ,2(α=a ，)cos ,1(α=b ，且b a //，则=+-)2cos()sin(αππα______．15. 过抛物线x y C 4:2=的焦点F 作直线l 交抛物线C 于B A ,两点，若A 到抛物线的准线的距离为4，则AB ＝________.16．已知边长为ABCD 的顶点都在同一个球面上，若3BAD π∠=，平面ABD ⊥平面CBD ，则该球的表面积为_______.三、解答题：本大题共6小题，共70分.解答时应写出必要的文字说明、证明过程或演算步骤. 17．(10分)已知直线:20l ax y a ++=，1:10l x ay a ++-=，圆22:x 8120C y y +-+=. (1)当a 为何值时，直线1l l 与平行；(2)当直线l 与圆C 相交于,A B两点，且AB =时，求直线l 的方程．18．（12分）已知等差数列{}n a 中,n S 为其前n 项和,若62211,0a S ==. (1)求通项n a ；(2)设{}n n b a -是首项为1,公比为2的等比数列,求数列{}n b 的通项公式及其前n 项和n T .19.（12分）已知ABC ∆是斜三角形，内角C B A ,,所对的边的长分别为c b a ,,.若C a A c cos 3sin =. （1）求角C ；（2）若21=c ，且A A B C 2sin 5)sin(sin =-+，求ABC ∆的面积．20.（12分）如图，在几何体BACDEF 中，四边形CDEF 是菱形，//AB CD ，平面ADF ⊥平面CDEF ，AD AF =.（1）求证：AC DF ⊥；（2）若2,1FA FC FD AB ====，求三棱锥A CDF -和三棱锥E BDF -的体积.21.（12分）已知椭圆C ：22221(0)x y a b a b +=>>的离心率22=e ，左、右焦点分别为21F F 、，抛物线x y 242=的焦点F 恰好是该椭圆的一个顶点． (1)求椭圆C 的方程；(2)已知直线l y kx m =+：与圆M ：3222=+y x 相切，且直线l 与椭圆相交于A B 、两点，求OB OA ⋅的值.22.(12分) 设0a >，函数2()22ln f x x ax a x =--,2ln ()x xg x x +=. (1)当12a =时，求函数(x)f 的单调区间； (2)求函数)(x g 的极值；(3)若函数(x)f 在区间()0,+∞上有唯一零点，试求a 的值．2020年1月甘肃省河西五市部分普通高中高三第一次联合考试数学答题卷（文科）二、填空题（每题5分，共20分）13. 14. 15. 16. 三、解答题（70分）17.（10分）18.（12分）学校：班级：姓名：考号：请不要在密封线内答题20.（12分）。

甘肃省河西五市部分普通高中2022届高三英语1月第一次联合考试新人教版

2022年1月甘肃省河西五市部分普通高中高三第一次联合考试本试卷分第I卷选择题和第II卷非选择题两部分。

总分150分，考试时间120分钟。

第I卷共115分第一部分听力共两节，满分30分第一节共5小题，每小题分，满分分听下面5段对话，每段对话后有一个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置；听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。

每段对话仅读一遍。

1．Who were born in an and Mr Hi B The woman and Mr Hi C The woman and Mi Hi 2．What are the two e to the womanA．To comAlaskaWashingtone B What for C So what D Wh not 22 We don’t thin the eAmericaChinaAr cticfortabe a 41 A43 A53 ALondon, New YorkAsiaMaldivesNew York, ThailandThailandNew Yorke a ef-em6,000 ae true D A bird in hand i worth two in the buhCA unfower i a unfower A mobie bine the two to do omething for our oca environment A ear a net ear it ma we be e ue out and the fower grow in the UniversityWarwickBritaining cheaBritaine to buiding tudSecond, mae ure that no matter what haean re-woring difficut , getting tutoring, or reading, then do it The more review wor ou do at a time, the better our grade wi be Don’t be one of thoe who wait unti the at minute to tud It’ more fun to get eeFina, -oving require ou to wor on our -oving i in order to get good grade So ath, chemitr, etc ae eA ou buid our habit, get into a groove成为习惯__75____A If ou don’t go to ca, ou’ mi need-to-now information and an other imoingC I’ve got a it of a want to nowD Come ue quetion that ou coud a our e daF Good habit, on the other hand, tend to tae more time to maeG The more ou do it, the more natura it’ fee第II卷非选择题（共35分）第四部分: 写作（共两节, 满分35分）第一节：短文改错（共10分,每小题1分,满分10分）该文中共有十处错误,每句中最多有两处,错误涉及一个单词的增加、删除或修改。

甘肃省河西五市部分普通高中2020┄2021届高三第一次联考英语

本试卷分第Ⅰ卷（选择题）和第Ⅱ卷（非选择题）两部分。

满分120分，考试时间为100分钟。

第一部分阅读理解（共两节，满分40分）第一节（共15小题；每小题2分，满分30分）阅读下列短文，从每题所给的四个选项（A、B、C和D）中,选出最佳选项。

并在答题卡上将该选项涂黑．ANext year marks the 150th anniversary of when large numbers of Chinese started working on a huge project in the Un ited States. They help to build America’s first transcontinental railroad between 1863 and 1869, connecting the East Coast with the West.People know little about the Chinese railroad workers and what happened to them after the project was finished. Stanford University in California wants to learn more about the lives of these men by reaching out to their families.Bill Yee’s ancestors came from southern China. He said, “My great-great-grandfather came to America during the‘gold rush’days and he returned to China as a wealthy man. And then my great-grandfather came to work on the railroad and died there.”But that did not stop his grandfather from coming to the US on false papers. He operated a laundry. Bill Yee’s father continued to run the business and ha s never returned to China.“Things were pretty bad in some parts of China in the 1860’s. They came to America at all costs in order that they no longer had to bear hunger,” Bill Yee said.Shelley Fisher Fishkin is helping to direct the Chinese Railroad Workers in North America Project at Stanford University. She said, “Many of the Chinese workers who came to work onthe transcontinental and other railroads returned to China after their work was done and created families there. Some of them settled in America and created new families, but they had families who they left when they came here and they may have descendants in China.”There is a need to create a record of the object and spoken history from the families of the railroad workers.“The US could not ha ve become the modern industrial nation without the railroads. And the railroads would not have come together without the work of these Chinese workers,” said Shelley Fisher Fishkin.1. What do you know about Bill Yee？A. His family was rich in the 1860’s.B. His father settled in the USA.C. He knows little about his ancestors and hopes to know more.D. His grandfather came to America with his great-grandfather.2. According to Bill Yee, many Chinese went to America in the 1860’s mainly .A. to run their own businessesB. to find their ancestorsC. to make a livingD. to dig gold3. According to Shelley Fisher Fishkin, .A. the descendants of the Chinese railroad workers all live a good lifeB. they expect to find all the descendants of the Chinese railroad workersC. some Chinese railroad workers hope they can find their descendants in ChinaD. some Chinese railroad workers have descendants both in China and the US4. Why did Stanford University carry out the project？A. Because they want to help the Chinese railroad workers’ descendants to get together.B. Because they want to show the importance of America’s first transcontinental railroad.C. Because they want to learn more about how to build a railroad in the past in America.D.Because they want Americans to remember the Chinese railroad workers’ role in UShistory.BThe World Bank has looked at the distinguishing features of successful school system.According to the World Bank’s education speciali st, Harry Patrinos, this include：improving the quality of teachers and making sure that teachers are highly regarded; providing information to make schools accountable and giving autonomy to schools and head teachers.This matters not only for individual pupils but also for the well-being of countries, he says, because improving educational performance has a direct impact on improving economic performance.China’s education performance—at least in cities such as Shanghai and Hong Kong—seems to be as spect acular as the country’s fast growing economy.Certainly both these open and outward-looking cities consider education to be important and are willing to adopt the best educational practices from around the world to ensure success. In Hong Kong, education accounts for more than one-fifth of entire government spending every year.“Shanghai and Hong Kong are small education systems, with a concentration of ideas, manpower and resources for education,” says Prof Cheng.Under the banner “First class city, first class education”, Shanghai set about systematically re-equipping classroom, upgrading schools and improving the curriculum in the last decade.It got rid of the “key schools” system which concentrated resources only on top students and top schools. Instead staff were trained in more interactive teaching methods and computers were brought in.About 80% of Shanghai school leavers go to university compared to an overall average of 24% in China.Meanwhile, dynamic Hong Kong was forced into educational improvements as its industries moved to cheaper mainland Chinese areas in the 1990s.Its survival as a service and management hub depends on upgrading knowledge and skills.In the last decade Hong Kong has concentrated on closing the gap for all students, says a report by McKinsey management consultants.The report, How the World’s Most Improved School Systems Keep Getting Better, rated Hong Kong’s education system among the best in the world.5. The World Bank’s survey about education mainly concentrates on .A. what has made some education systems successfulB. China’s education system and competitive examsC. how to relieve Chinese students of their heavy schoolworkD. the relationship between education and economic development6. According to Harry Patrinos, the key to successful school systems is .A. to give autonomy to all teachers to educate students freely in classB. to let students attend after-school tutoring and do more exercisesC. to improve teachers’ abilities and give schools free performance rightD. to make school education directly serve the economy of the country7. We can learn from the text that .A. the “key school” system is the key to many schools’ failureB. students in Shanghai and Hong Kong work the hardestC. Hong Kong’s educational performance isn’t as good as Shanghai’sD. Shanghai and Hong Kong’s economic performance will improve8. What is the author’s attitude towards the school systems of Shanghai and Hong Kong？A. Negative.B. Positive.C. Neutral.D. Critical.CA ground-based system that uses much stronger signals than GPS can find your location in cities and indoors. It is a new positioning system that could compete with GPS to make sure you never lose your directions again.Instead of satellites, Locata uses ground-based equipment to launch a radio signal over a localized area that is a million times stronger on arrival than GPS. It can work indoors as well as outdoors, and the makers claim the receivers can be shrunk to fit inside a regular cell phone. Even the US military, which invented GPS technology, signed a contract last month agreeing to a large-scale test of Locata at the White Sands Missile Range in New Mexico.“This is one of the most important technology developm ents for the future of the positioning industry,” says Nunzio Gambale, CEO and co-founder of the firm Locata, based in。

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甘肃省河西五市部分普通高中2021届高三上学期第一次联合考试（1月）英语试题01命题学校：嘉峪关市酒钢三中命题人：高三英语组本试卷分第I卷（选择题）和第II卷（非选择题）两部分。

总分120分，考试时间100分钟。

第I卷（共85分）第一部分英语知识运用（共两节，满分45分）第一节语法和词汇知识（共15小题;每小题1分，满分15分）从A、B、C、D四个选项中，选出可以填人空白处的最佳选项。

1.---I got a rise in salary! ---_____________.A. Yes, I think so.B. You did？C. Are you？D. My pleasure.2. The police are trying to find out the ____ of the woman killed in the traffic accident．A．evidence B．recognition C．identity D．status3. The development of industry has been ____gradual process throughout _____ human existenc e, from stone tools to modern technology.A. 不填; theB. the; aC. a; 不填D. a; a4. —I thought you ______ for vacation tomorrow.—I had planned to, but I have a very important meeting to attend tomorrow.A. will leaveB. are leavingC. have leftD. were leaving5.I’m not a little tired today after giving the room a thorough cleaning and I have never had ______today.A. as tiring a day asB. as a tiring day asC. tiring as a day asD. day as a tiring as6.Beyonce, a leading _____in the music industry, gave birth to a daughter on Saturday.A. statueB. figureC. brandD. attraction7. The shop owner will get all these goods ordered ___________ to the customers today.A．to deliver B．delivering C．deliver D．delivered8. Don’t you think this shirt is too tight _____ the shoulders？A. acrossB. overC. aboveD. through9.The old pictures bring them to the days ______they spent together, ____life was hard but happy.A. when, whoseB. which, whoseC. which, whenD. when, which10.---Do you remember John who disliked learning at school？ Have any news about him？---Oh, John, you couldn’t imagine he _______ teacher.A. turnedB. becameC. wasD. turned into11. _________the phenomenon of “bystander effect”in the Yueyue event, most Chinese strongly believe t hat there still exist love and warmth in people’s hearts.A. In spite ofB. In addition toC. Because ofD. On behalf of12.You must have watched that football match last night, __________？A. must youB. haven’t youC. di dn’t youD. aren’t you13.--Don’t you believe me？ --_____, I will believe ______you say.A. No; whateverB. Yes, no matter whatC. No; no matter whatD. Yes, whatever14.I would rather ________ to work after my graduation, but my father wouldrather I ________ abroad for further education.A. go ;had goneB. go; wentC. went ; went D . went ; will go15.He went home for lunch____ the clock struck twelve.A. whileB. immediatelyC. right awayD. at once第二节完形填空（共20小题；每小题1.5分，满分30分）阅读下面短文，掌握其大意，然后从16—35各题所给的四个选项（A、B、C和D）中选出最佳选项，并在答题卡上将该项涂黑。

Now you’re a fool for helping. “I don’t want to get involved” seems to have become a national motto. One summer I was driving from my hometown of T ahoe City, California to New Orleans, Louisiana. In the middle of the desert, I passed a young man standing by the roadside. He had his 16 out and held a gas can in his other hand. I drove right by him. There was atime 17 you’d be called a jerk （混蛋） for passing by somebody 18Several days later I was still 19 about the hitchhiker （搭便车的人）, about how I didn’t even lift my foot 20 the accelerator （加速踏板）for him. “Does anyone stop any more？” I wondered. I recalled Blanche DuBois’s famous line—”I have always depended on the kindness of strangers.” Was that 21 these days？ One way to test this would be for a person to journey 22 the US without any money, just 23 on the good will of others. What would happen？ Would he find food, shelter and support？The idea intrigued （激起兴趣） me.The week I 24 37, I realized that I had never done something truly crazy. 25 I decided to really do it：travel from the Pacific to the Atlantic without a penny. I would only accept 26 of rides, food and places to sleep. For six weeks I hitched 82 rides and covered 4,223 miles across 14 states. I was treated kindly 27 I went. I was 28 by people’s readiness to help a stranger.In Oregon, a house painter named Mike 29 the cold weather and asked if I had a coat. Id idn’t, so he gave me a big green army-style jacket. A lumber-mill worker in Michigan named Tim invited me to a 30 dinner with his family in their shabby house. Then he offered me a tent.I refused, but Tim insisted, packing it into my bag himself. I found people were generally compassionate. Hearing I had no money and would take none, people bought me foodor 31 with them whatever they happened to have. Those who had the 32 to give often gave the most.I’m 33 to all the people I met for their rides, their food, their shelter and their gifts. My faith in ordinary folks was 34 . I was proud to live in a country where people were still willing to help. In spite of everything, you can still depend on the 35 of strangers.16. A. thumb B. finger C. foot D. hand17. A. that B. where C. which D. when18. A. in danger B. in need C. in trouble D. in favor19. A. worrying B. considering C. bringing D. thinking20. A. off B. on C. away D. from21. A. interesting B. possible C. necessary D. important22. A. across B. through C. in D. over23. A. basing B. relying C. insisting D. relating24. A. seemed B. got C. became D. turned25. A. But B. So C. And D. However26. A. jobs B. supplies C. helps D. offers27. A. nowhere B. everywhere C. anywhere D. somewhere28. A. frightened B. annoyed C. disappointed D. amazed29. A. noted B. saw C. felt D. sensed30. A. simple B. rich C. delicious D. interesting31. A. supplied B. offered C. shared D. provided32. A. fewest B. most C. least D. best33. A. careful B. grateful C. hopeful D. helpful34. A. created B. reminded C. renewed D. returned35. A. kindness B. happiness C. fairness D. brightness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，共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AHenry Edwards HuntingtonHenry Edwards Huntington was born in 1850 in Oneonta，New York．In 1872 he went to work for his uncle，one of the owners of the Central Pacific Railroad．Twenty years later，Huntington moved to San Francisco at his uncle's request to share management of the Southern Pacific Railroad．On the way to San Francisco，he visited San Marino，and later bought it，which is home to his collections today．In 1902，Huntington moved his business operations to Los Angeles，where he developed the street railway system that created the structure of the Los Angeles area．He greatly expanded the existing electric railway lines，creating an extensive inter-urban system providing the transportation necessary．Huntington’s business interests continued to grow particularly in the areas of water，power，and land development；at one time he served on as many as 60 corporate boards throughout the United States．At the age of 60，he announced his decision to retire in order to devote time to his book and art collections and the landscaping of the 600一acre farm．In 1911 the large Beaux Arts building，in the charge of the architect Myron Hunt，was completed．In 1913，Huntington married Arabella Duval Huntington．She shared his interests in collecting．As one of the most important art collectors of her generation，she was highly influential in the development of the art collection now shown in the former building．In 1919，Henry and Arabella Huntington signed the agreement that conveyed their San。