河南省太康县第一高级中学2019-2020高三上期第五次 周练 解析版
河南省太康县第一高级中学2019-2020学年高考仿真卷数学试卷含解析〖加15套高考中考模拟卷〗

河南省太康县第一高级中学2019-2020学年高考仿真卷数学试卷一、选择题:本题共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.以抛物线C 的顶点为圆心的圆交C 于A 、B 两点,交C 的准线于D 、E 两点.已知|AB|=,|DE|=,则C 的焦点到准线的距离为 ( ) A .8B .6C .4D .22.已知直线l 过点()2,0-且倾斜角为α,若l 与圆()22320x y -+=相切,则3πsin(2)2α-( )A .35B .35-C .45D .45-3. “4a ≥或0a ≤” 是“函数2()1f x ax ax =++存在零点”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 4.已知复数1221iz iz i+=++,则z =( ) A .22 B .5C .2D .55.执行下面所示的程序框图,则输出的n 值是( ).A .5B .7C .9D .116.设{}n a 是任意等差数列,它的前n 项和、前2n 项和与前4n 项和分别为,,X Y Z ,则下列等式中恒成立的是( ) A .23X Z Y += B .44X Z Y +=C .237X Z Y +=D .86X Z Y +=7.()73111x x ⎛⎫-+ ⎪⎝⎭展开式中3x 的系数为( ) A .-7B .28C .35D .428.已知()1f x x =+,()ln g x x =,若12()()f x g x =,则21x x -的最小值为( )A .1B .2C .2ln 2-D .2ln2+9.已知a 是实数,1a ii+-是纯虚数,则 a 等于( ) A.B .1- CD .110.已知向量(2,1)a =r ,(1,)b k =-r,343()()5152nq n =+,则k =( ) A .8- B .6- C .6D .811.设ABC ∆的内角,,A B C 所对边的长分别为,,a b c ,若2,3sin 5sin b c a A B +==,则角C =( ) A .3π B .23π C .34π D .56π12.若变量x ,y 满足约束条件11y x x y y ≤⎧⎪+≤⎨⎪≥-⎩,则3x y +的最大值是( )A .1B .2C .3D .4二、填空题:本题共4小题,每小题5分,共20分。
2024-2025学年河南省周口市太康第一高级中学高三(上)第一次月考数学试卷(含答案)

2024-2025学年河南省周口市太康第一高级中学高三(上)第一次月考数学试卷一、单选题:本题共8小题,每小题5分,共40分。
在每小题给出的选项中,只有一项是符合题目要求的。
1.已知集合A ={x|x x−1≤0},则∁R A =( )A. (−∞,0)∪(1,+∞)B. (−∞,0]∪[1,+∞)C. (−∞,0)∪[1,+∞)D. [0,1)2.设x ∈R ,则“ x +1≤2”是“|x−1|<2”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3.十六世纪中叶,英国数学家雷科德在《砺智石》一书中首先把“=”作为等号使用,后来英国数学家哈利奥特首次使用“<”和“>”符号,并逐渐被数学界接受,不等号的引入对不等式的发展影响深远.若a ,b ,c ∈R ,则下列命题正确的是( )A. 若a >b ,则a|c|>b|c|B. 若a >b ,则1a 2<1b 2C. 若a c 2>b c 2,则a >bD. 若a 2>b 2,则a >b 4.已知a ,b ∈R ,且2a−b−2=0,则9a +13b 的最小值为( )A. 2B. 4C. 6D. 85.已知函数f(x)的定义域为R ,f(x +2)为偶函数,f(2x +1)为奇函数,则( )A. f(−12)=0B. f(−1)=0C. f(2)=0D. f(4)=06.已知函数f(x)的定义域为R ,满足f(x +1)=f(1−x),当x 1,x 2∈(1,+∞),且x 1≠x 2时,f(x 1)−f(x 2)x 1−x 2<0恒成立,设a =f(−1),b =f(0),c =f(e)(其中e =2.71828…),则a ,b ,c 的大小关系为( )A. c >a >bB. c >b >aC. b >a >cD. b >c >a7.已知函数f(x)={−x 2+ax,x ≤1ax−1,x >1,若∃x 1,x 2∈R ,x 1≠x 2,使得f(x 1)=f(x 2)成立,则实数a 的取值范围是( )A. a <2B. a >2C. −2<a <2D. a >2或a <−28.如果函数f(x)=12(m−2)x 2+(n−8)x +1(m ≥0,n ≥0)在区间[12,2]上单调递减,那么mn 的最大值为( )A. 16B. 18C. 25D. 812二、多选题:本题共3小题,共18分。
河南省太康县第一高级中学高二下学期第五次周测数学(

太康一高高二理科数学第五次周测试题焦睿智 2018.4.8说明:满分150分.时间100分钟.未标记的题目所有考生均做,已标记的按标记要求做。
一、选择题 (本大题共12个小题,每小题6分,共60分) 1.复数21ii -的虚部是( ) A. 1- B. 1C. i -D. i2( )A .0BC .2D .43.如图是函数()b ax x x f ++=2的部分图像,则函数()()x f x x g '+=ln 的零点所在的区间是( )A B .()2,1 C D .()3,24(t 表示时间,s 表示位移),则瞬时速度为0的时刻是( )A .0秒、2秒或4秒B .0秒、2秒或16秒C .2秒、8秒或16秒D .0秒、4秒或8秒5. i 为虚数单位,则1211i i -⎛⎫⎪+⎝⎭的值是A. i -B. iC. 1D. -16.用反证法证明命题: “三角形的内角中至少有一个不大于60°”时,假设正确的是() A .假设三内角都不大于60° B .假设三内角都大于60° C .假设三内角至多有一个大于60° D .假设三内角至多有两个大于60° 7.设0()sin xf x tdt =⎰,则( ) A .1- B .1 C .cos1-D .1cos1-8.若函数(1)4a xy ex -=+(x ∈R )有大于零的极值点,则实数a 范围是( )A .3a >-B .3a <-C D 9.设)(21312111)(+∈+++++++=N n nn n n n f ,则=-+)()1(n f n f ( )A 、121+n B 、221121+-+n n C 、221121+++n n D 、221+n 10(普通班).观察下列各式:,7,4,3,1443322=+=+=+=+b a b a b a b a , (115)5=+b a 则=+1010b a( )A.28B.76C.123D.19910(北清班).设,0>a 方程()()0ln ln =--+x a x a x x 有解,则a 的取值范围是( ) A.(]1,0 B. (]2,0 C. (]2,1 D. (]3,1二、填空题(4×6分) 11.已知点p 在曲线41x y e =+上,α为曲线在点p 处的切线的倾斜角,则α的取值范围是__12. 类比平面内 “垂直于同一条直线的两条直线互相平行”的性质,可推出空间下列结论:①垂直于同一条直线的两条直线互相平行;②垂直于同一个平面的两条直线互相平行;③垂直于同一条直线的两个平面互相平行;④垂直于同一个平面的两个平面互相平行.则正确结论的序号是13.复数3||,121=-=z i z ,那么||21z z -的最大值是 14. 曲线1y x=和2y x =在它们交点处的两条切线与x 轴所围成的三角形面积是 三、解答题:15、16每题12分;17、18、19每题14分 15.已知函数x x x x f 116)(23+-=,其图象记为曲线C. (1)求曲线C 在))3(,3(1f P 处的切线方程l ;(2)记曲线C 与l 的另一个交点为))(,(222x f x P ,线段21P P 与曲线C 所围成的封闭图形的面积记为S ,求S 的值.16.在数列{}n a 中,已知111,().12nn na a a n N a ++==∈+(1)求234,,a a a ,并由此猜想数列{}n a 的通项公式n a 的表达式; (2)用数学归纳法证明你的猜想.17.某分公司经销某种品牌产品,每件产品的成本为3元,并且每件产品需向总公司交a 元(3a 5)的管理费,预计当每件产品的售价为x 元(9x 11)时,一年的销售量为(12-x )2万件。
河南省太康一高2019-2020高三上期一轮复习最新语法填空

语法填空(一)when I was little, Friday night was (us) family game night.After supper, we would play card games of all (sort) in the sitting room. As kid. I loved to watch cartoons. but no matter how many times I asked (watch) them, my parents would not let me.They would say me that playing card games would help my brain.Still I was (willing)to play the games them sometimes. I didn’t realize how right my parents (be) until I entered high school. The games my parents (teach) me when I was a child turned out to be very useful (late)in my life.当我小的时候,周五晚上是家庭游戏之夜。
晚饭后,我们会在客厅里玩各种纸牌游戏。
像孩子。
我喜欢看卡通片。
但是不管我问他们多少次,我父母都不让我看。
他们会说玩纸牌游戏可以帮助我的大脑。
尽管如此,我有时还是愿意和他们玩游戏。
直到我上高中我才意识到我的父母是多么正确。
当我还是个孩子的时候,我父母教我的游戏对我后来的生活非常有用。
答案Our, sorts, a, to watch, to, unwilling, with, were, taught, later.句子结构:Ask to do sthSay to sbBe willing to do sthTurn out结果证明是,无被动语态Realize后面的宾语从句。
2019-2020学年河南省周口市太康县第一高级中学高一物理期末试题含解析

2019-2020学年河南省周口市太康县第一高级中学高一物理期末试题含解析一、选择题:本题共5小题,每小题3分,共计15分.每小题只有一个选项符合题意1. (单选)“飞花两岸照船红,百里榆堤半日风,卧看满天云不动,不知云与我俱东”中的“云不动”所选定的参考系是()A 榆堤B 风C 船D江岸参考答案:C“不知云与我俱东”说明云和船(我)相对静止,故所选定的参考系是船;故选C。
2. (多选题)右图是某物体做直线运动的v﹣t图象,由图象可得到的正确结论是()A.t=1 s时,物体的加速度大小为1.0 m/s2B.t=5 s时,物体的加速度大小为0.75 m/s2C.第3 s内物体的位移大小为1.5 mD.物体在加速过程中的速度变化率比减速过程中的速度变化率大参考答案:BD【考点】匀变速直线运动的图像.【分析】速度时间图线的斜率表示物体的加速度大小,图线与时间轴所围成的面积表示物体的位移.加速度等于速度的变化率.由此分析答题.【解答】解:A、在0~2s内做匀加速直线运动,加速度保持不变,则t=1 s时,物体的加速度大小为a===1.5m/s2.故A错误.B、在3~5s内做匀减速直线运动,加速度保持不变,则t=5 s时,物体的加速度大小为|a|=||==0.75 m/s2,故B正确;C、物体在第3s内的位移x=3×1m=3m.故C错误.D、加速度等于速度的变化率,所以物体在加速过程中的速度变化率比减速过程中的速度变化率大,故D正确.故选:BD3. 关于电场线的说法,正确的是()A.电场线的方向,就是电荷受力的方向。
B.正电荷只在电场力作用下一定沿电场线运动。
C.电场线越密的地方,同一电荷所受电场力越大。
D.电势降低的方向就是电场线的方向。
参考答案:C4. (多选题)公路急转弯处通常是交通事故多发地带.如图所示,假设某公路急转弯处是一圆弧,当汽车行驶的速率为v c时,汽车恰好没有向公路内外两侧滑动的趋势,则在该弯道处()A.路面外侧高内侧低B.路面内外侧一样高C.车速虽然高于v c,但只要不超出某一最高限度,车辆便不会向外侧滑动D.车速只要低于v c,车辆便会向内侧滑动参考答案:AC【考点】向心力.【分析】汽车拐弯处将路面建成外高内低,汽车拐弯靠重力、支持力、摩擦力的合力提供向心力.速率为v c时,靠重力和支持力的合力提供向心力,摩擦力为零.根据牛顿第二定律进行分析.【解答】解:A、路面应建成外高内低,此时重力和支持力的合力指向内侧,可以提供圆周运动向心力,故A正确,B错误.C、当速度为v c时,静摩擦力为零,靠重力和支持力的合力提供向心力,速度高于v c时,摩擦力指向内侧,只有速度不超出最高限度,车辆不会侧滑.故C正确.D、车速低于v c,所需的向心力减小,此时摩擦力可以指向外侧,减小提供的力,车辆不会向内侧滑动,故D错误.故选:AC.5. 一物体做加速直线运动,依次经过A、B、C三位置,B为AC的中点,物体在AB段的加速度为a1,在BC段的加速度为a2.现测得B点的瞬时速度v B=(v A+v C),则a1与a2的大小关系为()A.a1>a2 B.a1=a2 C.a1<a2 D.无法比较参考答案:C【考点】匀变速直线运动的图像;匀变速直线运动的速度与时间的关系.【分析】作出速度﹣时间图象,根据“面积”大小等于位移,B为AC的中点和B点的瞬时速度v B=(v A+v C),分析物体是否做匀加速运动.若不匀加速运动,运用作图法分析加速度的关系.【解答】解:如果物体从A至C的过程中是作匀加速直线运动,则物体的速度图线如图1所示,∵B点是AC的中点,很显然可以看出图线下所对应的面积s1≠s2,要满足s1=s2的条件,时间t1必须要向右移至图2所示的位置,又∵v B=(v A+v C),这是从A至B匀加速运动过程中的中间时刻的瞬时速度,即t1=t2时刻的瞬时速度,但t1时刻所对应的位置又不是AC的中点(∵s1≠s2),要同时满足s1=s2和v B=(v A+v B)的条件,将图1中的时刻t1沿t轴向右移至满足s1=s2位置处,如图2所示,再过v B=(v A+v B)点作平行于时间轴t 的平行线交于B点,连接AB得到以加速度a1运动的图线,连接BC得到以加速度a2运动的图线,比较连线AB和BC的斜率大小,不难看出a2>a1,∴C选项正确故选C二、填空题:本题共8小题,每小题2分,共计16分6. 在“探究小车速度随时间变化的规律”的实验中,打点计时器使用的交流电的频率为50 Hz,记录小车运动的纸带如图所示,在纸带上选择0、1、2、3、4、5的6个计数点,相邻两计数点之间还有四个点未画出,纸带旁并排放着带有最小分度为毫米的刻度尺,零点跟“0”计数点对齐,由图可以读出三个计数点1、3、5跟0点的距离填入下列表格中.d1 d2 d3计算小车通过计数点“2”的瞬时速度为v2 =______ m/s.小车的加速度是a =______ m/s2.参考答案:1.20 5.40 12.00 0.21 0.907. 荡秋千是小孩非常喜欢的娱乐活动。
河南省周口市太康县第一高级中学高三化学期末试题含解析

河南省周口市太康县第一高级中学2020年高三化学期末试题含解析一、单选题(本大题共15个小题,每小题4分。
在每小题给出的四个选项中,只有一项符合题目要求,共60分。
)1. 下列说法不正确的是()A.云、烟、雾等均能产生丁达尔现象B.开发氢能、太阳能、风能、生物质能等新型能源是践行低碳生活的有效途径C.“光化学烟雾”、“硝酸型酸雨”的形成都与氮氧化合物有关D.用脱硫处理的煤代替原煤做燃料可以有效减少空气中CO2气体的含量参考答案:D考点:常见的生活环境的污染及治理;分散系、胶体与溶液的概念及关系;使用化石燃料的利弊及新能源的开发..分析:A、根据云、烟、雾等属于胶体来分析;B、开发氢能、太阳能、风能、生物质能等可以减少火力发电;C、光化学烟雾与氮氧化物有关,“硝酸型酸雨”原因是水中含有硝酸,与氮氧化物有关;D、用脱硫处理的煤代替原煤做燃料可以有效减少空气中SO2气体的含量.解答:解:A、云、烟、雾等属于胶体,具有丁达尔现象,故A正确;B、开发氢能、太阳能、风能、生物质能等可以代替火力发电,减少二氧化碳的排放,故B正确;C、氮氧化物排放到空气中易形成“光化学烟雾”、“硝酸型酸雨”等环境污染,故C正确;D、煤中含有硫元素,用脱硫处理的煤代替原煤做燃料可以有效减少空气中SO2气体的含量,故D错误.故选D.点评:本题考查较为综合,涉及胶体、能源、环境等问题,题目难度不大,注意基础知识的积累.2. 下列有关试剂的保存方法,错误的是 ( )A. 少量的钠保存在煤油中B. 浓硝酸保存在无色玻璃试剂瓶中C. 氢氧化钠溶液保存在具橡皮塞的玻璃试剂瓶中D. 新制的氯水通常保存在棕色玻璃试剂瓶中参考答案:答案:B3. 甲、乙两烧杯中各盛有1L0.6mol·L-1的盐酸和NaOH溶液,向两烧杯中分别加入等质量的铝粉,反应结束后测得生成的气体体积比为V(甲) : V(乙)= 3: 4,则加入铝粉的质量为A. 2. 7 gB. 3. 6 gC. 5. 4 gD. 7.2 g参考答案:D略4. 下列说法正确的是A. SiO2是酸性氧化物,能与NaOH溶液反应B.明矾水解形成的Al(OH)3能杀死水中的细菌,可用于水的杀菌消毒C.Al2O3与NaOH溶液反应生成NaAlO2,而Fe2O3与NaOH溶液反应生成Fe(OH)3D. Al与少量的NaOH溶液反应生成Al(OH)3,与过量的NaOH溶液反应则生成NaAlO2参考答案:略5. 下列实验操作与预期目的或所得结论一致的是()选项实验操作实验目的或结论A 用激光笔照射某有色玻璃出现丁达尔现象,说明该有色玻璃是胶体B 向混有乙酸和乙醇的乙酸乙酯的混合物中,加入饱和NaOH溶液洗涤、分液得到较纯净的乙酸乙酯C 向裂化汽油中加入酸性高锰酸钾溶液,振荡,紫色褪去说明汽油中含有甲苯等苯的同系物D AgCI饱和溶液中加入少量NaI溶液产生黄色沉淀,说明Ksp(AgI>Ksp(AgCI)参考答案:A略6. 设N A代表阿伏加德罗常数,下列有关叙述正确的是()A.24g镁的原子最外层电子数为N AB.1L0.1mol/L乙酸溶液中的H+离子数为0.1N AC.1mol甲烷分子所含质子数、电子数均为10N AD.标准状况下,22.4L乙醇的分子数等于N A参考答案:C略7. 下列叙述不正确的是:A.Li在氧气中燃烧主要生成B.含金属元素的离子不一定都是阳离子C.构成分子晶体的粒子中不一定含有共价键D.离子化合物中可能含有共价键参考答案:A8. 已知短周期元素的四种离子:a A2+、b B+、c C3-、d D—都具有相同的电子层结构,则下列叙述中正确的是A.原子序数d>c>b>aB.单质的还原性D<C<B<AC.离子半径C3->D—> B+>A2+D.A、B、C最高价氧化物对应水化物溶液(等物质的燕浓度)的pH值C>B>A 参考答案:C略9. 把4.48L CO2通过一定量的固体过氧化钠后收集到3.36L气体(气体的测量均在标准状况下),则这3.36L气体的质量是()A.6.0g B.5.6g C.4.8g D.3.8g参考答案:A略10. 常温下,向Na2CO3溶液中逐滴滴入0.1mol/L盐酸,溶液的pH随着滴入盐酸溶液体积变化曲线如下图,则下列说法正确的是A.a点时溶液pH=11.5,原因是:CO32-+H2O=HCO3-+OH-B.a-b段发生反应为:CO32-+2H+=CO2↑+H2OC.b-c段发生反应为:HCO3-+H+=CO2↑+H2OD.c-d段发生反应为:H++OH-=H2O参考答案:C知识点:计算离子反应解析:a点时溶液pH=11.5,是因为碳酸钠的水解,但水解是可逆的,A错误;Na2CO3溶液中逐滴滴入盐酸的反应顺序是Na2CO3+HCl=NaHCO3+NaCl,NaHCO3+HCl=NaCl+CO2↑+H2O,即a-b段发生反应为:CO32-+H+= HCO3-,B错误,C正确,c-d段盐酸过量,D错误。
河南省太康一高2018-2019上学期高三英语第二次周练考试试卷

高三英语周练试卷考试时间120,分值150语法知识运用(共20小题;每题1.5分,满分30分)第一节单句语法填空1.You can depend on _____that he will come to your help when needed.2.______(base) an important decision more on emotion than on reason, you will regret itsooner or later.3.It is recommended that the picnic to be held this Sunday ________(delay) because of theweather.4. A new study suggests that yelling at children may have consequences that go beyond_____of beating them.5.I remembered ________(tease) about my red hair when I was at primary school.6.We would rather our daughter ________(stay) at home with us, but it is her choice, andshe is not a child any longer.7.Mr. Smith prefers_______( go) out for a walk after supper than stay at home.rge quantities of rice ________(be )sold at a discount in the market yesterday.9.How did _____come about that he knew where we were?10.I owed my life to her, said Nancy________(tear)第二节单句改错11. He made that clear that he didn’t want to talk about it.12. This is the first time that I saw the night face to face.13. Today a number of people learning English in China is increasing rapidly.14. He was determined to do it even at risk of being laughed at.15. I found it impossible of him to answer such a question.1/ 1916. Handing out red packets is a kind of expression of love to children, regardless of how much money it contain.17. It was more her work than cleverness led to her success.18. If all companies follow the example of this company, our earth will be the much better place.19. Some statues of famous people will be set up encourage us to work hard.20. It is five months when my son went to America.第二部分阅读理解(共两节,满分40分)第一节(共15小题;每小题2分,满分30分)阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡上将该项涂黑。
太康县第一高级中学2018-2019学年上学期期中高考数学模拟题

太康县第一高级中学2018-2019学年上学期期中高考数学模拟题 班级__________ 座号_____ 姓名__________ 分数__________一、选择题(本大题共12小题,每小题5分,共60分.每小题给出的四个选项中,只有一项是符合题目要求的.)1. 已知函数x x x f 2sin )(-=,且)2(),31(log ),23(ln 3.02f c f b f a ===,则( ) A .c a b >> B .a c b >> C .a b c >> D .b a c >>【命题意图】本题考查导数在单调性上的应用、指数值和对数值比较大小等基础知识,意在考查基本运算能力. 2. 已知点A (0,1),B (3,2),C (2,0),若AD →=2DB →,则|CD →|为( )A .1 B.43C.53D .2 3. 数列1,3,6,10,…的一个通项公式是( )A .21n a n n =-+ B .(1)2n n n a -=C .(1)2n n n a += D .21n a n =+ 4. 复平面内表示复数的点位于( )A 第一象限B 第二象限C 第三象限D 第四象限5. 设a ,b ∈R ,i 为虚数单位,若2+a i1+i =3+b i ,则a -b 为( )A .3B .2C .1D .06. 若直线:1l y kx =-与曲线C :1()1e xf x x =-+没有公共点,则实数k 的最大值为( )A .-1B .12C .1D 【命题意图】考查直线与函数图象的位置关系、函数存在定理,意在考查逻辑思维能力、等价转化能力、运算求解能力.7. 已知点P 是双曲线C :22221(0,0)x y a b a b-=>>左支上一点,1F ,2F 是双曲线的左、右两个焦点,且12PF PF ⊥,2PF 与两条渐近线相交于M ,N 两点(如图),点N 恰好平分线段2PF ,则双曲线的离心率是( )A.5B.2 D.2【命题意图】本题考查双曲线的标准方程及其性质等基础知识,意在考查运算求解能力. 8. 已知向量=(1,2),=(x ,﹣4),若∥,则x=( ) A . 4 B . ﹣4 C . 2 D . ﹣29. 已知集合{2,1,1,2,4}A =--,2{|log ||1,}B y y x x A ==-∈,则A B =( )A .{2,1,1}--B .{1,1,2}-C .{1,1}-D .{2,1}--【命题意图】本题考查集合的交集运算,意在考查计算能力. 10.已知集合,则A0或 B0或3C1或D1或311.已知是虚数单位,若复数)(3i a i +-(R a ∈)的实部与虚部相等,则=a ( )A .1-B .2-C .D . 12.在下面程序框图中,输入44N =,则输出的S 的值是( )A .251B .253C .255D .260【命题意图】本题考查阅读程序框图,理解程序框图的功能,本质是把正整数除以4后按余数分类.二、填空题(本大题共4小题,每小题5分,共20分.把答案填写在横线上)13.函数)(x f (R x ∈)满足2)1(=f ,且)(x f 在R 上的导函数)('x f 满足3)('>x f ,则不等式123)2(-⋅<x x f 的解集为 .【命题意图】本题考查利用函数的单调性解抽象不等式问题,本题对运算能力、化归能力及构造能力都有较高要求,难度大.14.设平面向量()1,2,3,i a i =,满足1ia =且120a a ⋅=,则12a a += ,123a a a ++的最大值为 .【命题意图】本题考查平面向量数量积等基础知识,意在考查运算求解能力. 15.已知点E 、F 分别在正方体的棱上,且, ,则面AEF 与面ABC 所成的二面角的正切值等于 .16.已知向量,满足42=,2||=,4)3()(=-⋅+,则与的夹角为 .【命题意图】本题考查向量的数量积、模及夹角知识,突出对向量的基础运算及化归能力的考查,属于容易题.三、解答题(本大共6小题,共70分。
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太康一高2019---2020学年度高三第五次双周练英语试题(考试时间:120分钟分值:150分)第一部分:基础知识考查一.单句语法填空(每空1.5分,共15分)1.Today, we’ll discuss a number of cases _____ beginners of English fail to use thelanguage properly.2.There is much doubt _____ he will keep his word .3.Some of us remain ______(seat) at our computer for hours every day ,forgettingmoving our body is also an option .4.They solve the conflict ______peace .5.He asked me several questions ______(concern) the future of the company .6.What a bargain ! The price of this dress is not half as much as _____of the skirt .7.______(surround) by beautiful green mountains and located at the foot of MountLu makes it a famous tourist attraction .8.I regret to inform you that your brother is just the one we’ll getsomeone_____ .(replace)9.Barbara is easy to recognize as she’s the only one of the women who______(dress) in red.10.We live in ______is called Information Age now .二 .单句改错(每题1.5分,共15分)11.For some reason what escapes me , we had to take a taxi .12.That is surprising that the whole park and facilities have been designed to be usedfor free .13.The sports park lay in Nan Shan District ,was to be opened to the public soon .14.It was Sunday , rather than stay at home ,I preferred to travel .15.Taking part in eco-travel and you will find it will help you understand theimportance of nature.16.Luckily enough, he was the only one who survived in the flood.17.With the wealth of the country increase, more waste will be produced .18.The time he has devoted to help the disabled is now considered to be of greatvalue.19.He often lent me a hand when I was in trouble, to which I was grateful .20.I fell in love with the city for the first time I visited it .第二部分:阅读理解(共2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。
AWonderful Summer CampsID Tech CampAt ID Tech Camps, students from 10 to 18 learn to design video games, design robots, model 3D characters, work with AI, build laptops, learn about Internet security, and more! The top universities on the planet—Stanford, MIT, Caltech.—have trusted and hosted our programs for over 19 years, inspiring students to dream BIG.Date: June 21st-June 30th.Tell: 408-871-2227MasterChef CampThis summer, experience one of the greatest cooking experiences on the planet! MasterChef is here to offer a mixture of exciting challenges and inspirational stories with enthusiasm, creativity and a love of food. We’re committed to helping kids and teens from 12 to 18 inspire their cooking interest and develop their cooking skills. Date: July 3rd—July 16thTell: 754-301-8885UC Irvine Sports CampHere at UC Irvine, each sports program is designed to promote skill development, raise awareness for health and fitness, and increase individual confidence through character and leadership development taught across camps. By developing techniques and creating a better understanding for sports, we guarantee a rich summer experience at an affordable price!Date: July 19th—July 31stTell: 949-824-6120Global Adventures CampOur Global Adventure programs are smaller group experiences for adventures in Western Canada and New Zealand or backpacking programs in Europe, These adventures quickly bring you a feeling of being with family members and will leave you with unforgettable lifelong memories. On the Backpack journeys, you will travelby trains, ferries and local transportation.Date: August 3rd-August 20thTell: 914-835-069921. Which number should you call to learn modern science skills?A. 914-835-0699.B. 949-824-6120.C. 754-301-8885.D. 408-871-2227.22. Participants of MasterChef Camp can .A. enjoy different discountsB. fall in love with cookingC. host technology programsD. try various transportations23. What is special about Global Adventures Camp?A. It’ll leave a deep impression in our mind.B. It’ll greatly increase our self-confidence.C. It’ll surely improve our family relations.D. It’ll enable us to focus more on our health.BIt goes without saying, but bears repeating, there are too many cats and dogs without homes. While there are countless shelters and rescue centers that exist, some potential pet owners look to pet shops to find their furry friends. All too often, however, these animals come from puppy and kitten mills (繁殖场) that treat the creatures in cruel ways. San Francisco, however, is doing their part to stop this abuse with pet store adoption. Officials recently voted to ban the sale of non-rescue dogs and cats in local shops.The effect is two-fold. One, it will stop the popularity of the large-scale mills, which are famous for the miserable conditions cats and does are kept in. Two, it will help facilitate the adoption of thousands of animals that are waiting for their forever homes in San Francisco shelters. District 4 Supervisor Katy Tang, who serves on the San Francisco Board of Supervisors, supported law-making on the ban. “Dogs andcats sold in pet stores often come from inhumane puppy and kitten mills that treat animals with no regard for their health or well-being”, she wrote on Facebook. In her message, she also called on the U. S. Agriculture Department to reinstate information on its website that documents these types of animal cruelty cases—it was removed earlier this month.San Francisco’s law-making is a victory for those concerned about animal rights, and they aren’t the first city to pass this type of measure. Los Angeles, San Diego, Chicago, Philadelphia, Boston, and Austin also have similar laws in place, with hopefully more places to follow suit.24. What happened to some dogs and cats before they got in the pet stores?A. They were treated cruelly.B. They were abandoned in streets.C. They received warm welcome.D. They were raised in shelters and rescue centers.25. Which of the following may Katy Tang agree with most?A. People should adopt the dogs and cats.B. Animals are too cruel to humans being.C. Government can choose to kill all the dogs and cats.D. It is not right to ban the sale of non-rescue dogs and cats in local shops.26. What does the underlined word “reinstate” in Paragraph 2 mean?A. updateB. replaceC. post againD. download27. What does the last paragraph mainly focus on?A. No Chinese city joins this type of movement.B. San Francisco is the last city to ban pet stores.C. Americans care about animals more than humans.D. More and more cities are involved in animal rights.CResearchers are now using three-dimensional, or 3D printing to create models of the human heart to help heart specialists. The heart doctors can use the models to better help patients before an operation.Surgeons regularly use digital images to explore the heart in close detail. But no two human hearts are alike. This led Matthew Bramlet, a children's heart expert, to create exact heart models from those images. He says the 3D models show information he cannot get in any other way. The 3D printed model adds a new dimension to heart surgery, allowing surgeons to see defects that might not be readily apparent in digital images.A 3D printer uses images from a digital display to create a physical model of a human heart. Pictures from medical tests like a CAT scan or an MRI scan are sent to a 3D printer to create a heart in a plaster or a clay form. The printer then constructs the heart, thin layer by thin layer. Dr. Bramlet says the model matches the real heart in every detail.Dr. Bramlet has built model hearts for different kinds of heart operations. All of the operations were successful. In his first case, digital images showed only one tiny hole in a baby's heart. But the 3D printed model showed several defects that the baby was born with. Dr. Bramlet says those defects could not be seen easily in the images. The heart surgeon was able to change the type of surgery for the patient based on the 3D model. He added that 3D heart models saved time during heart operations.Kathy Magliato is a heart surgeon. She welcomes the new technology. She says it could help her make better decisions before she operates on the hearts of her patients.Matthew Bramlet continues to research the technology. He is working with the National Institute of Health to build a 3D library that includes heart models and images that others can use.28. What’s the limitation of digital heart images?A. A lack of close details.B. Inability to display defects.C. Failure to show personal differences.D. Inaccuracy in the size of the child’s heart.29. What can the heart model created by 3D printing do?A. It can make defects readily apparent.B. It can conduct heart operations.C. It can replace the human heart.D. It can serve as an alternative to a CAT scan.30. What can we learn from the fourth paragraph?A. Dr.Bramlet wasted a lot of time in heart operations.B. 3D heart models have not been used in surgery at present.C. All of the operations were unsuccessful without 3D models.D. The model revealed defects previously unseen in the baby's heart.31. How does Kathy Magliato feel about the 3D printing?A. Supportive.B. Tolerant.C. Doubtful.D. Negative.DAstronauts on the International Space Station (ISS) may soon be able to turn their used forks and knives into tools and satellite parts.Tethers Unlimited Inc., an aerospace technology company, has developed a system that combines a waste recycling machine with a 3D printer.Astronauts will put waste items made of plastic into the recycling machine, called the Poistrusion Recycler. When they press a button, the Recycler will melt down the plastic and turn it into 3D filament (长丝).The filament will be used in a 3D printer on the ISS-called the Refabricator-to make tools, spare parts and satellite components.The waste will come from packaging materials, food containers, trays and eating utensils (器具) used on the ISS. Astronaut currently use disposable wet wipes to clean their food containers and utensils. The used wipes are stored as trash (垃圾), and replacement wipes must be sent up to the ISS on cargo missions.By recycling old food containers and utensils, astronauts will reduce the amount of trash they produce. To get rid of trash from the ISS, astronaut load it into empty cargo capsules (航天舱) and release it into space. The capsules burn up when they enter Earth’s atmosphere.Turning trash into useful new items will also help NASA save money because astronauts will need fewer supplies. It costs about $ 6,000 for every kilogram launched into orbit. These benefits will be even more important for longer missions in the future-such as the two-year journey to Mars. Astronauts will be able to recycle old waste materials into new tools and parts as they need them.Tethers have successfully tested the systems in its laboratory. They will test it on the ISS in late 2018. The company is also developing a version of the system for use here on Earth.32. What material are the forks and knives for astronauts made of?A. Gold.B. IronC. Plastic.D. Wood.33. At present, the astronauts mainly get supplies by .A. 3D printersB. reusing the old onesC. collecting from the spaceD. the capsules launched from the earth34. What can the new technology help the astronauts do?A. Reuse the trash.B. Send the trash to Mars.C. Take the trash to the earth.D. Load the trash into empty capsules and throw it away.35. What is the biggest benefit of the new technology mentioned in the text?A. It can save some space for the ISS.B. It can gave more time for the astronauts.C. It can provide more conditions to explore space.D. It can help to reduce the journey from Earth to Mars.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。