2020年衡水高三模拟卷

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衡水中学2020届高三模拟考试理科综合试题及答案

衡水中学2020届高三模拟考试理科综合试题及答案

衡水中学2020届高三模拟考试理科综合测试第Ⅰ卷选择题(共126分)一、选择题:本题共13小题,每小题6分,共78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。

4.研究人员以生长状态相同的绿色植物为材料,在相同的条件下进行了四组实验。

其中D组连续光照T 秒,A、B、C组依次加大光照—黑暗的交替频率,每组处理的总时间均为T秒,发现单位光照时间内光合作用产物的相对含量从A到C依次越来越大。

下列相关说法正确的是()A.实验说明白天给予一定频率的遮光有利于农作物增产B.实验过程中C组积累的有机物最多C.实验结束后立即检测植物体内NADPH含量,D组最高D.实验组由黑暗变为光照时,光反应速率增加,碳反应速率变小5.生物兴趣小组为探究影响插条生根的因素,以同一植株的枝条为材料开展研究。

他们用营养素和生长调节剂X处理枝条后,得到如下结果。

据图分析,下列推断合理的是A.营养素比生长调节剂X对插条的生根具有更大的促进作用B.有叶枝条可能会产生与营养素有类似作用的物质C.生长调节剂X对两种枝条的生根均有较大的促进作用D.营养素对两种枝条的生根均有较大的促进作用6.科研小组研究不同密度、不同性比率对雌性小白鼠的影响,进行了相关实验,实验结果如下图所示:下列相关叙述中,正确的是A.影响小白鼠性成熟的因素只有性比率B.实验中各雌性小白鼠的繁殖强度无明显差异C.高密度偏雌性组的低妊娠率可能与性成熟延缓有关D.偏雌性的性比率有利于该小白鼠种群数量的增长7.化学与人类生产、生活密切相关,下列叙述中正确的是A.可折叠柔性屏中的灵魂材料——纳米银与硝酸不会发生化学反应.B.2022年北京冬奧会吉祥物“冰墩墩”使用的聚乙烯属于高分子材料C.“珠海一号”运载火箭中用到的碳化硅也是制作光导纤维的重要材料D.建设世界第一高混凝土桥塔用到的水泥和石灰均属于新型无机非金属材料8.化合物丙是一种医药中间体,可以通过如图反应制得。

下列有关说法不正确的是A.丙的分子式为C10H14O2B.乙分子中所有原子不可能处于同-平面C.甲.乙、丙均能使酸性高锰酸钾溶液褪色D.甲的一氯代物只有2种(不考虑立体异构)9.用N A表示阿伏加德罗常数的值。

2020届河北省衡水中学高三模拟(三)数学(文)试题

2020届河北省衡水中学高三模拟(三)数学(文)试题
20.如图,椭圆 : ( )的离心率为 ,直线 : 与 只有一个公共点 .
(1)求椭圆 的方程.
(2)不经过原点 的直线 与 平行且与 交于 , 两点,记直线 , 的斜率分别为 , ,证明: 为定值.
21.已知函数 ( ).
(1)讨论 的单调性.
(2)证明:当 时, ( ).
22.在直角坐标系 中,直线 的参数方程为 ( 为参数).以坐标原点 为极点, 轴的正半轴为极轴建立极坐标系,曲线 的极坐标方程为 .
【详解】
由 得, ,即 ,
所以 .
故选:D.
【点睛】
本题主要考查由复数相等求参数的问题,熟记复数的乘法运算法则即可,属于基础题型.
2.D
【解析】
【分析】
先求得集合U、A,再利用补集的运算可得选项.
Hale Waihona Puke 【详解】因为 , 或 ,所以 .
故选:D.
【点睛】
本题考查集合的补集运算,属于基础题.
3.A
【解析】
【分析】
A. B. C. D.
8.甲、乙、丙、丁四人参加完机器人设计编程比赛,当问到四人谁得第一时,甲说:“是乙或丙获得第一名”;乙说:“甲、丙都未获得第一名”;丙说:“我获得第一名”;丁说:“是乙获得第一名”.已知他们四人中只有两人说的是真话,根据以上信息可以判断得第一名的人是()
A.甲B.乙C.丙D.丁
评卷人
得分
四、解答题
17.已知 的内角 , , 的对边分别为 , , ,且满足 .
(1)求 ;
(2)若 , 的面积为 ,求 的周长.
18.如图,矩形 所在平面垂直于直角梯形 所在平面, , , , , , , 分别是 , 的中点.
(1)证明: 平面 ;

【衡水金卷】河北省衡水中学2020届高考模拟押题卷(一)理科综合能力测试(含答案)

【衡水金卷】河北省衡水中学2020届高考模拟押题卷(一)理科综合能力测试(含答案)

【衡水金卷】河北省衡水中学2020届高考模拟押题卷(一)理科综合能力测试注意事项:1.本试卷分第I卷(选择题)和第Ⅱ卷(非选择题)两部分。

答卷前,考生务必将自己的姓名、准考证号填写在答题卡上。

2.回答第I卷时,选出每小题答案后,用铅笔把答题卡上对应题目的答案标号涂黑。

如需改动,用橡皮擦干净后,再选涂其他答案标号。

写在本试卷上无效。

3.回答第Ⅱ卷时,将答案写在答题卡上。

写在本试卷上无效。

4.考试结束后,将本试卷和答题卡一并交回。

可能用到的相对原子质量:H1C12N14O16Si28Fe56第I卷一、选择题:本题共13小题,每小题6分。

在每小题给出的四个选项中,只有一项是符合题目要求的。

1.下列关于细胞中某些物质的叙述,错误的是A.组成纤维素、淀粉、糖原的单体是相同的B.RNA可以在细胞核或某些细胞器中合成C.抗体的形成与分泌需要ATP直接提供能量D.激素和神经递质的合成是在核糖体上进行的2.甲乙两种物质在胰岛B细胞内、外的浓度情况如图所示,下列相关叙述正确的是A.甲可以是Na+,胰岛B细胞兴奋时Na+内流会导致细胞内Na+浓度高于细胞外B.甲可以是氧气,其进入细胞后可以在细胞质基质或线粒体参与相关反应C.乙可以是DNA,其运出细胞后可将遗传信息传递给其他细胞D.乙可以是胰岛素,其运出细胞时不需要载体的协助3.如图表示生物体内遗传信息的传递和表达过程,下列叙述不正确的是A.上述过程均需要模板、酶、能量和原料,并且均遵循碱基互补配对原则B.在神经细胞和甲状腺细胞中均能进行2过程,并且形成的RNA也相同C.过程3中涉及到5种碱基和8种核苷酸D.RNA发生改变,通过5过程形成的蛋白质不一定发生改变4.下列关于植物激素、植物生长调节剂的叙述中,不合理的是A.植物激素不直接参与细胞代谢,只传递调节代谢的信息B.用一定浓度的赤霉素处理种子可以促进其萌发C.给去掉尖端的胚芽鞘放置含生长素的琼脂块后仍能生长,说明生长素可促进生长D.生长素和细胞分裂素在促进植株生长方面存在协同关系5.下图是某家族甲病(A-a)和乙病(B-b)的遗传系谱图。

【精编】2020年衡水中学高三模拟(三)数学(文)试题(解析版)

【精编】2020年衡水中学高三模拟(三)数学(文)试题(解析版)

2020年衡水中学高三模拟(三)数学(文)试题一、单选题1.已知等差数列{}n a 满足:12a =,且125a a a ,,成等比数列,则数列{}n a 的前n 项和为( ) A .2n B .22n C .2n 或22n D .2n 或42n -2.已知函数2()4,()f x x g x =-是定义在(,0)(0,)-∞+∞上的奇函数,当0x >时,2()log g x x =,则函数()()y f x g x =⋅的图象大致为 ( )A .B .C .D .3.已知集合{0,1,2,3,}I =集合{0,1},{0,3},M N ==则()I NM =( ) A .{0} B .{3} C .{0,2,3} D .∅4.已知复数z 满足(1)2i z i +⋅=-,则复数z 的共轭复数为A .1322i -B .1322i +C .13i +D .13i -5.已知不等式220x x e e kx -+<在[)0,+∞上无解,则实数k 的取值范围是( )A .1,2⎡⎫+∞⎪⎢⎣⎭ B .1,2⎡⎫-+∞⎪⎢⎣⎭ C .1,2⎛⎫+∞ ⎪⎝⎭ D .1,2⎛⎫-∞ ⎪⎝⎭ 6.已知函数()3f x x ax =+的图象在点()()1,1f 处的切线斜率为-3,则()f x 的极大值点为A .B .-2CD .2 7.在长方体1111ABCD A B C D -中,2AB BC ==,1AC 与平面11BB C C 所成的角为30,则该长方体的体积为( )A .B .C .D .8.已知向量(2cos ,2sin ),(3cos ,3sin )a b ααββ==,若a 与b 的夹角为60,则直线2cos 2sin 10x y αα++=与圆22(cos )(sin )1x y ββ-+-=的位置关系是( )A .相交但不过圆心B .相交且过圆心C .相切D .相离9.下列说法:①分类变量A 与B 的随机变量2K 越大,说明“A 与B 有关系”的可信度越大,②以模型kxy ce =去拟合一组数据时,为了求出回归方程,设ln z y =,将其变换后得到线性方程0.34z x =+,则,c k 的值分别是4e 和0.3,③根据具有线性相关关系的两个变量的统计数据所得的回归直线方程为y a bx =+中,2b =,1x =,3y =,则1a =,④若变量x 和y 满足关系0.11y x =-+,且变量y 与z 正相关,则x 与z 也正相关,正确的个数是( )A .1B .2C .3D .410.设变量x ,y 满足约束条件{2x −y −3≥0x −2y −4≤0y ≥1,若目标函数z =ax +by(a >0,b >0)的最小值为1,则1a +1b 的最小值为( )A .7+2√6B .7+2√2C .3+2√6D .3+2√2 11.设抛物线()2 20y px p =>的焦点为F ,过F 的两条直线1l ,2l 分别交抛物线于点A ,B ,C ,D ,且1l ,2l 的斜率1k ,2k 满足()121210,0k k k k +=>>,若 AB CD +的最小值为30,则抛物线的方程为( )A .26y x =B .23y x =C .232y x =D .22y x =12.“军事五项”是衡量军队战斗力的一种标志,从1950年开始,国际军体理事会每年组织一届军事五项世界锦标赛.“军事五项”的五个项目分别为200米标准步枪射击、500米障碍赛跑、50米实用游泳、投弹、8公里越野跑.已知甲、乙、丙共三人参加“军事五项”.规定每一项运动队的前三名得分都分别为a 、b 、c (a >b >c 且a 、b 、c ∈N*),选手最终得分为各项得分之和.已知甲最终得22分,乙和丙最终各得9分,且乙的投弹比赛获得了第一名,则50米实用游泳比赛的第三名是 A .甲B .乙C .丙D .乙和丙都有可能二、双空题13.已知数列{}n a 满足()112335212n n a a a n a ++++⋅⋅⋅+-=,则3a =______,若对任意的*N n ∈,()1n n a λ≥-恒成立,则λ的取值范围为______.三、填空题14.某住宅小区有居民2万户,从中随机抽取200户,调查是否安装宽带,调查结果如下表所示:则该小区已安装宽带的居民估计有______户.15.已知ABC 的三个内角,,A B C 所对的边分别为,,a b c ,ABC 的外接圆的面积为3π,且222cos cos cos 1sin sin A B C A C -+=+,则ABC 的最大边长为______16.已知函数()()1222x x a f x a R ++=∈-为奇函数,且()y f x =的图象和函数2x y m =-的图象交于不同两点A 、B ,若线段AB 的中点M 落在直线12y上,则实数m 的值为______.四、解答题17.已知ABC ∆是锐角三角形,内角,,A B C 的对边分别为,,a b c ,且2sin a B =.(Ⅰ)求角A 的大小;(Ⅱ)若6a =,且ABC ∆的面积S =ABC ∆的周长.18.设椭圆中心在坐标原点,焦点在x 轴上,一个顶点坐标为()2,0. (1)求这个椭圆的方程; (2)若这个椭圆左焦点为1F ,右焦点为2F ,过1F 且斜率为1的直线交椭圆于A B 、两点,求2ABF ∆的面积.19.在直角坐标系xoy 中,曲线1C 的方程为sin x y θθ⎧=⎪⎨=⎪⎩(θ为参数),曲线2C 的方程为1x =.以O 为极点,x 轴的非负半轴为极轴建立极坐标系.(1)求曲线1C 和2C 的极坐标方程;(2)已知射线OM 的极坐标方程是0,02πθαρα⎛⎫=><<⎪⎝⎭,且与曲线1C 和2C 交于P ,Q 两点,试确定α的值,使2OP OQ 达到最小.20.已知函数sin ()a x f x x-=,0πx <<. (1)若0x x =时,()f x 取得极小值()0f x ,求()0f x 的取值范围;(2)当a π=,0m π<<时,证明:()ln 0f x m x +>.21.如图,在以A 、B 、C 、D 、E 、F 为顶点的五面体中,ABCD 是平行四边形,45BCD ∠=︒,平面ABCD ⊥平面CDEF ,FB FC =.(1)求证:BF CD ⊥;(2)若22AB EF ==,BC =BF 与平面ABCD 所成角为45︒,求该五面体的体积. 22.某果农选取一片山地种植红柚,收获时,该果农随机选取果树20株作为样本测量它们每一株的果实产量(单位:kg ),获得的所有数据按照区间(]40,45,(]45,50,(]50,55,(]55,60进行分组,得到频率分布直方图如图。

河北省衡水中学2020届高三年级模拟试题(一)(理数)

河北省衡水中学2020届高三年级模拟试题(一)(理数)

河北省衡水中学2020届高三年级模拟试题(一)数 学(理科)本试卷总分150分,考试时间120分钟。

注意事项:1.答卷前,考生务必将自己的姓名、准考证号填写在答题卡上相应的位置。

2.全部答案在答题卡上完成,答在本试卷上无效。

3.回答选择题时,选出每小题答案后,用2B 铅笔把答题卡上对应题目的答案标号涂黑。

如需改动,用橡皮擦干净后,再选涂其他答案标号。

回答非选择题时,将答案用0.5 mm 黑色笔迹签字笔写在答题卡上。

4.考试结束后,将本试卷和答题卡一并交回。

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.设复数iiz -=12,则z 在复平面内对应的点位于 A .第一象限B .第二象限C .第三象限D .第四象限2.已知集合}0)2)(2(|{≤+-=x x x A ,}0|{a x x B ≤<Z ∈=.若}2,1{=B A I ,则实数a 的取值范围是 A .),2[+∞B .),2(+∞C .),1[+∞D .),1(+∞3.2020年第1期深圳车牌摇号竞价指标共6 668个,某机构从参加这期车牌竞拍且报价在1~8万元的人员中,随机抽取了若干人的报价,得到的部分数据整理结果如下:报价区间(单位:万元)[)2,1[)3,2[)4,3频数103640则在这些竞拍人员中,报价不低于5万元的人数为 A .30 B .42 C .54 D .804.已知c b a >>,且0=++c b a ,则下列不等式一定成立的是A .bc ab >B .bc ac <C .||||bc ab >D .011>+ca5.设实数y x ,满足约束条件⎪⎩⎪⎨⎧≥++≥+≤,0632,2,2y x x y x y 则y x z 2-=的最小值为A .2-B .4-C .6-D .8- 6.已知0<ab ,若函数x x x f cos sin )(+=在区间],[b a 上单调,则ab 的最小值是A .42π-B .1632π-C .82π-D .162π-7.某正方体的三视图中的侧视图如图所示,是由两个全等的长方形构成,则该正方体的体积为A .8B .23C .4D .228.已知数列}{n a 为等比数列,n S 为其前n 项和,0>n a ,32=S ,154=S .对任意的正整数n ,下列结论正确的是A .122++=+n n n a a aB .1+>n n a SC .213++++>+n n n n a a a aD .21++≥⋅n n n a a a9.已知四棱锥ABCD P -的所有棱长均相等,过其外一点且与直线PA 和BC 所成的角都是o60的 直线的条数是 A .2 B .3 C .4 D .510.如图所示的44⨯正方形网格,可看成是横向、纵向各五条相等线段相交成的封闭图形,横向、纵向各取2条线段,则围成的封闭图形为正方形的概率为A .101 B .51 C .103 D .52 11.已知双曲线)0,0(1:2222>>=-b a by a x C 的右焦点为F ,过F 作直线l 与两条渐近线交于B A ,两点,若OAB ∆为等腰直角三角形(O 为坐标原点),则OAB ∆的面积为A .2aB .22aC .22a 或2aD .22a 或221a12.如图,正方形ABCD 的边长为2,O 是正方形ABCD 的中心,线段EF 过点O ,且1==OF OE ,EF 绕着点O 旋转,M 为线段AB 上 的动点,则MF ME ⋅的最小值为A .21- B .22- C .23- D .1-二、填空题:本题共4小题,每小题5分,共20分。

河北衡水中学2020届高三模拟考试理科综合能力试题及答案

河北衡水中学2020届高三模拟考试理科综合能力试题及答案

河北衡水中学2020届高三模拟考试理科综合能力试题第Ⅰ卷(选择题共126分)一、选择题:本大题共13小题,每小题6分。

在每小题给出的四个选项中,只有一项是符合题目要求的。

1.下列关于细胞结构和功能的叙述,正确的是()A.蛔虫细胞内无线粒体,只能进行无氧呼吸B.有高尔基体的细胞一定是分泌细胞C.衰老细胞内染色体固缩不影响DNA的复制D.性激素是由内质网上的核糖体合成的2.下列关于实验的叙述正确的是()A.观察人体口腔上皮细胞的线粒体时,用健那绿染色前需要先用盐酸处理B.在“生物体维持pH稳定的机制”的实验中,清水组和缓冲液组都可作对照组C.不可用绿色植物成熟叶肉细胞进行细胞失水和吸水的观察实验D.可用澄清的石灰水检验CO2是否生成,来探究酵母菌的呼吸方式3.如图1为适宜温度下小球藻光合速率与光照强度的关系;图2表示将小球藻放在密闭容器内,在一定温度条件下容器内CO2浓度的变化情况。

下列有关说法错误的是()A.图1中光照强度为8时叶绿体产生O2的最大速率为8B.图1中光照强度为2时,小球藻细胞内叶绿体产生的O2全部被线粒体消耗C.若图2实验中有两个小时处于黑暗中,则没有光照的时间段应是2~4 hD.图2实验过程中,4~6 h的平均光照强度小于8~10 h的平均光照强度4.为了确定下丘脑在体温调节中的作用,某实验小组做了如下实验:刺激小白鼠下丘脑前部,发现小白鼠有出汗现象,刺激小白鼠下丘脑后部,小白鼠出现寒战现象。

据此判断下列叙述正确的是()A.下丘脑前部是产热中枢所在地,下丘脑后部是散热中枢所在地B.刺激小鼠的下丘脑不同位置出现的变化说明下丘脑通过神经调节发送信息C.刺激小鼠下丘脑的前部,还可观测到的是小鼠毛细血管收缩D.下丘脑是体温调节中枢和体温感觉中枢5.下图是某生态农业的模式图,下列相关分析正确的是()A.流入该生态系统的总能量是蔬菜固定的太阳能总量B.对蔬菜除草、治虫能提高该生态系统的抵抗力稳定性C.生态农业能够提高物种丰富度和能量传递效率D.④过程中存在生态系统的信息传递6、研究发现,某昆虫有两种性别:性染色体组成为XX的是雌雄同体,XO(缺少Y染色体)为雄体。

2020届河北省衡水中学高三第四次模拟考试语文试题

2020届河北省衡水中学高三第四次模拟考试语文试题

2020届河北省衡水中学高三第四次模拟考试语文试题★祝考试顺利★注意事项:1、考试范围:高考范围。

2、试题卷启封下发后,如果试题卷有缺页、漏印、重印、损坏或者个别字句印刷模糊不清等情况,应当立马报告监考老师,否则一切后果自负。

3、答题卡启封下发后,如果发现答题卡上出现字迹模糊、行列歪斜或缺印等现象,应当马上报告监考老师,否则一切后果自负。

4、答题前,请先将自己的姓名、准考证号用0.5毫米黑色签字笔填写在试题卷和答题卡上的相应位置,并将准考证号条形码粘贴在答题卡上的指定位置。

用2B铅笔将答题卡上试卷类型A后的方框涂黑。

5、选择题的作答:每个小题选出答案后,用2B铅笔把答题卡上对应题目的答案标号涂黑。

写在试题卷、草稿纸和答题卡上的非选择题答题区域的答案一律无效。

6、主观题的作答:用签字笔直接答在答题卡上对应的答题区域内。

写在试题卷、草稿纸和答题卡上的非答题区域的答案一律无效。

如需改动,先划掉原来的答案,然后再写上新答案;不准使用铅笔和涂改液。

不按以上要求作答无效。

7、保持答题卡卡面清洁,不折叠,不破损,不得使用涂改液、胶带纸、修正带等。

8、考试结束后,请将本试题卷、答题卡、草稿纸一并依序排列上交。

一、现代文阅读(36分)(一)论述类文本阅读(本题共3小题,9分)阅读下面的文字,完成1-3题。

君子的意义楼宇烈①君子是中国文化的一个重要内容。

“君子”一词很难界定,勉强相应于西方文化中的绅士Gentleman。

研究表明,春秋之前,君子主要是指社会的掌权者、当权者,后世也有在这个意义上使用的,如“无君子莫治野人,无野人莫养君子”。

我们都希望社会的管理者是像样的君子,因为中国历代文化都强调统治者作为一个民族的表率,要通过教育来化导民众。

君子既是一个统治者,同时在某种意义上讲也是一个教育者。

《礼记·学记》开篇就讲“建国君营,教学为先”,就是说建立一个国家,君子来管理一个国家,要把教育放在第一位;通过教育达到的最后目标是“化民成俗”,形成一个良好的社会氛围。

河北省衡水中学2020届高三普通高等学校招生临考模拟(一)英语试题(解析版)

河北省衡水中学2020届高三普通高等学校招生临考模拟(一)英语试题(解析版)

河北省衡水中学2020届高三普通高等学校招生临考模拟(一)英语试题第一部分听力(共两节,满分30分)第一节(共5小题;每小题1.5分,满分7.5分)听下面5段对话。

每段对话后有一个小题,从题中所给的A、B、C三个选项中选出最佳选项。

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。

每段对话也读一通。

1. Where does the conversation probably take place?A.In a restaurant.B. In a library.C. In a shop.2.What's the first thing for the speakers to do?A. Go swimming.B. Do the cleaning.C. Visit their parents.3.At what age did the man begin learning to play Erhu from Mr. Liu?A. About 6.B. About 7.C. About 8.4.What are the speakers doing?A.Having a meeting.B.Having dinner.C.Drinking tea.5.What's the probable relationship between the speakers?A.Teacher and student.B.Colleagues.C.Classmates.第二节(共15小题;每小题1.5分,满分22. 5分)听下面5段对话或独白。

每段对话或独白后有几个小题,从题中所给的A、B、C三个选项中选出最佳选项。

听每段对话或独白前,你将有时间阅读各个小题,每小题5秒钟;听完后,各小题将给出5秒钟的作答时间。

每段对话或独白读两遍。

听第6段材料,回答第6、7题。

6.Where will the party be held?A. In the classroom.B. In the library.C. In the lab.7.What will the woman do tonight?A.Prepare for a party.B.Do an experiment.C.Write a survey paper.听第7段材料,回答第8至10题。

河北省衡水中学2020届高三化学第二次模拟考试试题(含解析)

河北省衡水中学2020届高三化学第二次模拟考试试题(含解析)

河北省衡水中学2020届高三第二次模拟考试理科综合化学试题1. 化学与生产和生活密切相关,下列有关说法正确的是A. 刚玉硬度仅次于金刚石,熔点也相当高,刚玉坩埚可用于熔融碳酸钾B. CO2是大量使用的灭火剂,但着火的镁条在CO2中继续燃烧说明它也可以助燃C. 人血清中的血浆铜蓝蛋白相对分子质量为151000,是人工合成的高分子化合物D. 牛奶中加入果汁会产生沉淀,是因为发生了酸碱中和反应【答案】B【解析】A、刚玉的主要成分是氧化铝,高温下氧化铝和碳酸钾反应,应该用铁坩埚,A错误;B、镁在CO2中燃烧生成氧化镁和碳,说明CO2也可以助燃,B正确;C、血浆铜蓝蛋白不是人工合成的,C错误;D、因牛奶中含有蛋白质,加入果汁能使蛋白质凝聚而沉淀,且牛奶不是酸,则不是酸碱之间的反应,D错误,答案选B。

2. 设N A为阿伏伽德罗常数值。

下列有关叙述不正确的是A. 1molC n H2n-2(n≥2)中所含的共用电子对数为(3n+l)N AB. 在K37ClO3+6H35Cl(浓)=KCl+3Cl2↑+3H2O反应中,若有212克氯气生成,则反应中电子转移的数目为5N AC. 60 克的乙酸和葡萄糖混合物充分燃烧消耗2N A个O2D. 5.8 g熟石膏(2CaSO4·H2O)含有的结晶水分子数为0.02N A【答案】A点睛:该题的易错选项是B和D,注意在反应中氯酸钾是氧化剂,氯化氢部分是还原剂,首先要计算氯气的平均相对分子质量,然后再进行电子转移计算。

熟石膏中相当于是2mol硫酸钙结合1mol水,答题时要注意和石膏的区别(CaSO4·2H2O)。

3. 25℃时,将浓度均为0.1mol/L,体积分别为Va和V b的HA溶液与BOH溶液按不同体积比混合,保持Va+V b=100mL,Va、Vb与混合液pH的关系如图所示,下列说法正确的是A. K a(HA)=1×10-6mol/LB. b点c (B+)=c(A-)=c(OH-)=c(H+)C. c点时,随温度升高而减小D. a→c过程中水的电离程度始终增大【答案】C【解析】根据图知,酸溶液的pH=3,则c(H+)<0.1mol/L,说明HA是弱酸;碱溶液的pH=11,c(OH-)<0.1mol/L,则BOH是弱碱;A.K a(HA)= c(H+)c(A-)/ c(HA)=10-3×10-3/0.1=1×10-5mol/L,A错误;B.b点二者恰好反应,溶液显中性,则c (B+)=c(A-)>c(OH-)=c(H+),B错误;C.c(A−)/c(OH−)•c(HA)=1/Kh,水解平衡常数只与温度有关,升高温度促进水解,水解平衡常数增大,因此该比值随温度升高而减小, C正确;D.酸或碱抑制水的电离,盐类水解促进水的电离,所以b点水电离出的c(H+)>10-7mol/L,而a、c两点水电离出的c(H+)<10-7mol/L,D错误;答案选C。

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2020年衡水高三英语模拟卷注意事项:1.本试卷分为四部分。

2.答题前,考生务必将自己的姓名、准考证号填写在本试卷相应的位置。

3.全部答案写在答题卡上,写在本试卷上无效。

4.本试卷满分150分,测试时间120分钟。

5.考试范围:高考全部内容。

第一部分听力(共两节,满分30分)做题时,先将答案标在试卷上。

录音内容结束后,你将有两分钟的时间将试卷上的答案转涂到答题卡上。

第一节(共5小题;每小题1.5分,满分7.5分)听下面5段对话。

每段对话后有一个小题,从题中所给的A、B、C三个选项中选出最佳选项。

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. What is the woman scolding Tom for?A. Playing computer games.B. Breaking the computer.C. Having a rest.2. What will the woman eat this evening?A. Meat.B. Fish.C. A bean dish.3. Who will the man ask to cut his hair next?A. The woman.B. The barber.C. The man's sister.4. What is the man worried about most?A. His clothes outside.B. His new house.C. The strawberry plants.5. How much will the man pay for his shoes?A.$80.B.$120.C.$160.第二节(共15小题;每小题1.5分,满分22.5分)听下面5段对话或独白。

每段对话或独白后有几个小题,从题中所给的A、B、C三个选项中选出最佳选项。

听每段对话或独白前,你将有时间阅读各个小题,每小题5秒钟;听完后,各小题将给出5秒钟的作答时间。

每段对话或独白读两遍。

听第6段材料,回答第6、7题。

6. Where are the two speakers now?A. In the Sun Hotel.B. At the airport.C. At the bus station.7. What will the woman do next?A. Book a room in the hotel.B. Meet her boss in the hotel.C. Clean Room 508 with the man.听第7段材料,回答第8、9题。

8. How long has the policy been in force?A. For five days.B. For six days.C. For twelve days.9. What do the students think of the new plan?A. Exciting.B. Disappointing.C. Tiring.听第8段材料,回答第10至12题。

10. What is the man doing?A. Lending his dictionary to the woman.B. Buying a new dictionary for the woman.C. Giving his dictionary to the woman.11. What is Molly's study plan next semester?A. Six months in France.B. Six months in Spain.C. One year in Spain.12. What is the man's advice on learning French?A. Going to France to travel.B. Learning from a French dictionary.C. Exposing oneself to the environment. 听第9段材料,回答第13至16题。

13. What does the man worry about?A. The practical road test.B. The check of driving license.C. The final theoretical examination.14. What is the first step after getting into the car?A. Drive along the road.B. Fasten your safety belt.C. Adjust your seat and rearview mirror.15. What will the driver do during the exam process?A. Ask the examiner the distance.B. Make a turning signal to change lanes.C. Pull over at traffic lights.16. What does the woman mean?A. She will help the man.B. She is busy now.C. The man needs a new car.听第10段材料,回答第17至20题。

17. Where will the members of the news team gather?A. In the gym.B. On the field.C. In the courtyard.18. Why is the trip to the museum put off?A. The weather will be bad.B. The teacher is sick.C. The museum is under repair.19. Who was delivered of a baby this morning?A. Mrs. Jennings.B. Mrs. Applebaum.C. Mrs. Shelly.20. What is the passage about?A. An announcement.B. An advertisement.C. A report.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A、B、C和D四个选项中,选出最佳选项。

ABest Cookbooks for Kids for 2019Best Overall: Cooking Class: 57 Fun Recipes Kids Will Love to Make (and Eat!)Buy on AmazonBuy on WalmartWith the help of this best-selling cookbook,your kids will become masters in the kitchen! Cooking Class: 57 Fun Recipes Kids Will Love to Make (and Eat!)is ideal for children aged6 to 12, as it includes detailed explanations of basic cooking techniques, plus more than 50 kid-friendly recipes. This award-winning cookbook is a comprehensive guide for cooking novices, explaining skills and recipes in kid-friendly language.Best for Learning Basics : Better Homes and Gardens New J unior CookbookBuy on AmazonBuy on WalmartIf you want to teach your kids cooking terms, tools and techniques, you need the Better Homes and Gardens New Junior Cookbook. This 128-page cookbook has more than 65 kid-friendly recipes, and it's perfect for introducing kids aged 5 to 12 to the wonderful world of cooking. It includes a detailed section on cooking terms, kitchen safety, tools (including pictures), and healthy cooking. It also addresses how to measure ingredients and how to read recipes.Best Classic: Betty Crocker's Cookbook for Boys and GirlsBuy on AmazonBuy on TargetBuy on WalmartThe first edition of this classic kids' cookbook was published more than 60 years ago, and the Betty Crocker's Cookbook for Boys and Girls is still a favorite for kids and adults alike. The recipes are ideal for children aged 8 to 12. This cookbook is an authentic reproduction of the original 1957 edition, which many baby boomers learned from themselves! Many older buyers write that they had the same cookbook growing up and love sharing the classic recipes with the next generation.Best Vegetarian: The Help Yourself Cookbook for KidsBuy on AmazonBuy on WalmartThis vegan cookbook is best for children aged 6 to 12, and its aim is to teach kids about healthy eating by involving them in the cooking process. The book features 60 plant-based recipes for you to make with your family, including meals, snacks, drinks and desserts.21. Which cookbook can be purchased on Target?A. Best Overall.B. Best for Learning Basics.C. Best Classic.D. Best Vegetarian.22. What can we know about Best for Learning Basics?A. It is an award-winning cook book.B. It teaches the kids about kitchen safety.C. It includes 60 plant-based recipes.D. It was published more than 60 years ago.23. What is the similarity between Best Overall and Best Vegetarian?A. They are both designed for kids.B. They have recipes based on plants.C. They have recipes for whatever you want.D. They explain how to measure ingredients.BGong Linna, renowned Chinese musician and founder of Chinese New Art Music, put her music teaching methods to practice for the first time at the Tracing Roots practice concert and music festival of the Affiliated High School of Peking University on May 23.The first song of the concert, Search High and Low, is an allusion(暗指)to the classical poem Li Sao, "The road ahead will be long. I shall search high and low." "It's arranged to be sung by all performers, indicating that we should all search high and low for our roots," Gong says.To explore the education and the popularization of Chinese music, in 2017, Gong established a research and development team, which includes ethnomusicologist, Du Yaxiong, and music historian, Zhao Zhongming, to deliberate her music teaching methods and summarize the vocal skills of Chinese music.Gong believed that the popularization of Chinese music should rely on primary and secondary schools rather than music academies. The children's passion for music and their outstanding performance amazed Gong, "When singing, they are completely immersed in the music. Music brings light and richness to one's spiritual world. So, learning to sing is never about passing examinations,but about enjoying the music."Lu Yueming, instructor of the school's art center, said, "The children worked really hard and kept in mind Gong's instructions. Seeing their performance, I know that they truly fell in love with traditional Chinese music.""Seeing the children perform my pieces, I realized I should write more songs for them,” Lao Luo, Gong's husband said proudly. "It's a great encouragement for me to see how much they like the songs, and they really need content related to Chinese culture.” With an international vision, Gong will continue to write songs based on Chinese folk music or ancient poems.Gong said children should learn about the beauty of Chinese music. Only when you know about your own sounds, can you have cultural confidence.24. Why is the song Search High and Low arranged at the concert?A. Because Gong is a renowned Chinese musician.B. Because people are expected to search their roots.C. Because Gong's music teaching method is practical.D. Because Gong wants to deliberate her music teaching method.25. What should the popularization of Chinese music depend on according to Gong?A. Music academies.B. The support of the government.C. Primary and secondary schools.D. Famous musicians across the country.26. What is Gong's future plan in music?A. She will train more children to study abroad.B. She will perform more concerts to promote Chinese music.C. She will help children learn about the beauty of various types of music.D. She will write more songs based on Chinese folk music or ancient poems.27. What's the best title of the passage?A. Creating Music Helps Cultural ConfidenceB. Gong Linna - My DramatistC. Music Education Gets New V oiceD. Chinese Music: Development, InstrumentsCSeventeen-year-old Lindsey Stoefen loves to play tennis, softball and run until last October when a rare disorder paralyzed her legs and left her in a wheelchair. But in late April after becoming an in-patient at Marianjoy Rehabilitation Hospital in Chicago, the teen climbed into a specially designed exoskeleton (外骨骼) which supported her body and moved her legs."Yes, I'm gonna be a robot! And I was scared at first. Am I gonna like it? Is it gonna be okay? And then once I got into it, I loved it.” Lauren Bularzik. Lindsey's physical therapist, says the exo robots help to accelerate the recovery process.For someone who takes a lot of energy to only walk a few feet, exo can get them up and get them moving. Besides speeding up recovery time, these robotic skeletons are especially helpful for those with paralysis, from spinal cord injuries and strokes.Using the machine can help some patients rewire their brains to use secondary muscles, so they can eventually walk again without the device. But Patrick Wensing, assistant professor at the University of Notre Dame says exoskeletons have one big drawback. While existing exoskeletons are very powerful, right now theydon't understand what the user wants to do. So in order to switch between activities in daily life, you often have to press a button interface to tell the exoskeleton "I would like to stand up now".Wensing and his team are cooperating with Ekso Bionics, a leading developer of wearable robots, to create a machine that can understand what its user wants to do without implanted sensors and complicated control panels.Taylor Gambon has spent the last year analyzing data from exoskeleton users and comparing them to models of everyday walking. Later this year, the team will travel to Ekso Bionics' California headquarters, where they will work directly with exoskeletons to design programs that interact with users of various disabilities, so that more people like Lindsey Stoefen can get back on their feet again.28. What's the purpose of the story about Stoefen in the first paragraph?A. To prove Stoefen's bravery against disability.B. To explain Stoefen's misfortune in life.C. To introduce advanced medical skills in Chicago.D. To introduce the topic of robotic skeleton.29. How does Patrick Wensing find the robotic skeletons?A. They can improve the recovery speed.B. They can replace the real person.C. They can't understand the intention of users.D. They can help patients do everything in life.30. What's the attitude of Taylor Gambon and his team towards the development of exo robots?A. Disappointed.B. Critical.C. Indifferent.D. Optimistic.31. Where is the text probably taken?A. An advertisement.B. A science fiction.C. A product handbook.D. A popular science magazine.DThe royal family is filled with rules, and one in particular might explain why Princess Charlotte is a princess, but her kids likely won't be.When it comes to the British royal family, one thing is almost always true: they have a pretty confusing set of official rules and protocols. For instance,the royal family doesn't have a last name. And don't forget the fact that Queen Elizabeth celebrates two birthdays every year.If your head isn't swimming yet, consider the tradition of royal titles. As a British custom, only the daughter of a prince or a prince's wife may be considered a formal "princess". The latter applies to Kate, who is both a princess and the Duchess of Cambridge thanks to her marriage to Prince William, the Duke of Cambridge. And their children, Prince George and Princess Charlotte, also bear official royal titles because their father is Prince William.However, while Prince George's future children will also carry their father's royal status, any children that Princess Charlotte has will not automatically be considered princes or princesses. Why? Royal custom dictates that royal titles arc passed down via sons, but not daughters."Royal titles are inherited through sons, so if Princess Charlotte has children they would not automatically inherit the titles (his or her royal highness) HRH, Prince, or Princess," Lucy Hume, associate director of etiquette experts Debrett's, told Town & Country.Of course, exceptions can (and will!)be made. (Learn about every time the British royal family broke their own protocol.) The Queen has offered HRH status to other royal offspring in the past,including the children of Queen Elizabeth's daughter, Anne. Although Princess Anne and her husband, Captain Phillips, declined, perhaps Princess Charlotte will be extended the same offer when her own children are born.32. What's the meaning of the underlined word "protocol" in the first paragraph?A. Promise.B. Behavior.C. Manners.D. Connection.33. What kind of child is regarded as "princess"?A. The son of a princess.B. The daughter of a prince.C. The daughter of a princess.D. The wife of a king.34. Who is Charlotte's father?A. Prince George.B. Elizabeth.C. Prince William.D. Captain Philips.35. What does the last paragraph mainly tell us?A. Any person can break traditional rules.B. Not every person must obey traditional rules.C. Any British royal family member has their own title.D. Maybe the British royal family will break their own rules.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。

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