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2022年重庆市中考数学试卷(B卷)及答案解析

2022年重庆市中考数学试卷(B卷)及答案解析

2022年重庆市中考数学试卷(B卷)一.选择题(共12个小题,每小题4分,共48分)在每个小题的下面,都给出了序号为A、B、C、D的四个选项,其中只有一个正确的,请将答题卡上题号右侧的正确答案所对应的方框涂黑.1.(4分)﹣2的相反数是()A.﹣2B.2C.﹣D.2.(4分)下列北京冬奥会运动标识图案是轴对称图形的是()A.B.C.D.3.(4分)如图,直线a∥b,直线m与a,b相交,若∠1=115°,则∠2的度数为()A.115°B.105°C.75°D.65°4.(4分)如图是小颖0到12时的心跳速度变化图,在这一时段内心跳速度最快的时刻约为()A.3时B.6时C.9时D.12时5.(4分)如图,△ABC与△DEF位似,点O是它们的位似中心,且相似比为1:2,则△ABC与△DEF的周长之比是()A.1:2B.1:4C.1:3D.1:96.(4分)把菱形按照如图所示的规律拼图案,其中第①个图案中有1个菱形,第②个图案中有3个菱形,第③个图案中有5个菱形,…,按此规律排列下去,则第⑥个图案中菱形的个数为()A.15B.13C.11D.97.(4分)估计﹣4的值在()A.6到7之间B.5到6之间C.4到5之间D.3到4之间8.(4分)学校连续三年组织学生参加义务植树,第一年共植树400棵,第三年共植树625棵.设该校植树棵数的年平均增长率为x,根据题意,下列方程正确的是()A.625(1﹣x)2=400B.400(1+x)2=625C.625x2=400D.400x2=6259.(4分)如图,在正方形ABCD中,对角线AC、BD相交于点O.E、F分别为AC、BD 上一点,且OE=OF,连接AF,BE,EF.若∠AFE=25°,则∠CBE的度数为()A.50°B.55°C.65°D.70°10.(4分)如图,AB是⊙O的直径,C为⊙O上一点,过点C的切线与AB的延长线交于点P,若AC=PC=3,则PB的长为()A.B.C.D.311.(4分)关于x的分式方程+=1的解为正数,且关于y的不等式组的解集为y≥5,则所有满足条件的整数a的值之和是()A.13B.15C.18D.2012.(4分)对多项式x﹣y﹣z﹣m﹣n任意加括号后仍然只含减法运算并将所得式子化简,称之为“加算操作”,例如:(x﹣y)﹣(z﹣m﹣n)=x﹣y﹣z+m+n,x﹣y﹣(z﹣m)﹣n =x﹣y﹣z+m﹣n,…,给出下列说法:①至少存在一种“加算操作”,使其结果与原多项式相等;②不存在任何“加算操作”,使其结果与原多项式之和为0;③所有的“加算操作”共有8种不同的结果.以上说法中正确的个数为()A.0B.1C.2D.3二.填空题(共4个小题,每小题4分,共16分)请将每小题的答案直接填在答题卡中对应的横线上.13.(4分)|﹣2|+(3﹣)0=.14.(4分)在不透明的口袋中装有2个红球,1个白球,它们除颜色外无其他差别,从口袋中随机摸出一个球后,放回并摇匀,再随机摸出一个球,两次摸出的球都是红球的概率为.15.(4分)如图,在矩形ABCD中,AB=1,BC=2,以B为圆心,BC的长为半径画弧,交AD于点E.则图中阴影部分的面积为.(结果保留π)16.(4分)特产专卖店销售桃片、米花糖、麻花三种特产,其中每包桃片的成本是麻花的2倍,每包桃片、米花糖、麻花的售价分别比其成本高20%、30%、20%.该店五月份销售桃片、米花糖、麻花的数量之比为1:3:2,三种特产的总利润是总成本的25%,则每包米花糖与每包麻花的成本之比为.三.解答题(共2个小题,每小题8分,共16分)17.(8分)计算:(1)(x+y)(x﹣y)+y(y﹣2);(2)(1﹣)÷.18.(8分)我们知道,矩形的面积等于这个矩形的长乘宽,小明想用其验证一个底为a,高为h的三角形的面积公式为S=ah.想法是:以BC为边作矩形BCFE,点A在边FE 上,再过点A作BC的垂线,将其转化为证三角形全等,由全等图形面积相等来得到验证.按以上思路完成下面的作图与填空:证明:用直尺和圆规过点A作BC的垂线AD交BC于点D.(只保留作图痕迹)在△ADC和△CFA中,∵AD⊥BC,∴∠ADC=90°.∵∠F=90°,∴①.∵EF∥BC,∴②.又∵③,∴△ADC≌△CFA(AAS).同理可得:④.S△ABC=S△ADC+S△ABD=S矩形ADCF+S矩形AEBD=S矩形BCFE=ah.三.解答题(共7个小题,每小题10分,共70分)19.(10分)在“世界读书日”到来之际,学校开展了课外阅读主题周活动,活动结束后,经初步统计,所有学生的课外阅读时长都不低于6小时,但不足12小时,从七,八年级中各随机抽取了20名学生,对他们在活动期间课外阅读时长(单位:小时)进行整理、描述和分析(阅读时长记为x,6≤x<7,记为6;7≤x<8,记为7;8≤x<9,记为8;…以此类推),下面分别给出了抽取的学生课外阅读时长的部分信息,七年级抽取的学生课外阅读时长:6,7,7,7,7,8,8,8,8,8,8,8,9,9,9,9,9,10,10,11,七、八年级抽取的学生课外阅读时长统计表年级七年级八年级平均数8.38.3众数a9中位数8b 8小时及以上所占百分比75%c根据以上信息,解答下列问题:(1)填空:a=,b=,c=.(2)该校七年级有400名学生,估计七年级在主题周活动期间课外阅读时长在9小时及以上的学生人数.(3)根据以上数据,你认为该校七,八年级学生在主题周活动中,哪个年级学生的阅读积极性更高?请说明理由.(写出一条理由即可)20.(10分)反比例函数y=的图象如图所示,一次函数y=kx+b(k≠0)的图象与y=的图象交于A(m,4),B(﹣2,n)两点.(1)求一次函数的表达式,并在所给的平面直角坐标系中画出该函数的图象;(2)观察图象,直接写出不等式kx+b<的解集;(3)一次函数y=kx+b的图象与x轴交于点C,连接OA,求△OAC的面积.21.(10分)为保障蔬菜基地种植用水,需要修建灌溉水渠.(1)计划修建灌溉水渠600米,甲施工队施工5天后,增加施工人员,每天比原来多修建20米,再施工2天完成任务,求甲施工队增加人员后每天修建灌溉水渠多少米?(2)因基地面积扩大,现还需修建另一条灌溉水渠1800米,为早日完成任务,决定派乙施工队与甲施工队同时开工合作修建这条水渠,直至完工.甲施工队按(1)中增加人员后的修建速度进行施工.乙施工队修建360米后,通过技术更新,每天比原来多修建20%,灌溉水渠完工时,两施工队修建的长度恰好相同.求乙施工队原来每天修建灌溉水渠多少米?22.(10分)湖中小岛上码头C处一名游客突发疾病,需要救援.位于湖面B点处的快艇和湖岸A处的救援船接到通知后立刻同时出发前往救援.计划由快艇赶到码头C接该游客,再沿CA方向行驶,与救援船相遇后将该游客转运到救援船上.已知C在A的北偏东30°方向上,B在A的北偏东60°方向上,且在C的正南方向900米处.(1)求湖岸A与码头C的距离(结果精确到1米,参考数据:≈1.732);(2)救援船的平均速度为150米/分,快艇的平均速度为400米/分,在接到通知后,快艇能否在5分钟内将该游客送上救援船?请说明理由.(接送游客上下船的时间忽略不计)23.(10分)对于一个各数位上的数字均不为0的三位自然数N,若N能被它的各数位上的数字之和m整除,则称N是m的“和倍数”.例如:∵247÷(2+4+7)=247÷13=19,∴247是13的“和倍数”.又如:∵214÷(2+1+4)=214÷7=30……4,∴214不是“和倍数”.(1)判断357,441是否是“和倍数”?说明理由;(2)三位数A是12的“和倍数”,a,b,c分别是数A其中一个数位上的数字,且a>b >c.在a,b,c中任选两个组成两位数,其中最大的两位数记为F(A),最小的两位数记为G(A),若为整数,求出满足条件的所有数A.24.(10分)如图,在平面直角坐标系中,抛物线y=﹣x2+bx+c与x轴交于点A(4,0),与y轴交于点B(0,3).(1)求抛物线的函数表达式;(2)点P为直线AB上方抛物线上一动点,过点P作PQ⊥x轴于点Q,交AB于点M,求PM+AM的最大值及此时点P的坐标;(3)在(2)的条件下,点P′与点P关于抛物线y=﹣x2+bx+c的对称轴对称.将抛物线y=﹣x2+bx+c向右平移,使新抛物线的对称轴l经过点A.点C在新抛物线上,点D在l上,直接写出所有使得以点A、P′、C、D为顶点的四边形是平行四边形的点D的坐标,并把求其中一个点D的坐标的过程写出来.25.(10分)在△ABC中,∠BAC=90°,AB=AC=2,D为BC的中点,E,F分别为AC,AD上任意一点,连接EF,将线段EF绕点E顺时针旋转90°得到线段EG,连接FG,AG.(1)如图1,点E与点C重合,且GF的延长线过点B,若点P为FG的中点,连接PD,求PD的长;(2)如图2,EF的延长线交AB于点M,点N在AC上,∠AGN=∠AEG且GN=MF,求证:AM+AF=AE;(3)如图3,F为线段AD上一动点,E为AC的中点,连接BE,H为直线BC上一动点,连接EH,将△BEH沿EH翻折至△ABC所在平面内,得到△B′EH,连接B′G,直接写出线段B′G的长度的最小值.2022年重庆市中考数学试卷(B卷)参考答案与试题解析一.选择题(共12个小题,每小题4分,共48分)在每个小题的下面,都给出了序号为A、B、C、D的四个选项,其中只有一个正确的,请将答题卡上题号右侧的正确答案所对应的方框涂黑.1.【分析】根据一个数的相反数就是在这个数前面添上“﹣”号,求解即可.【解答】解:﹣2的相反数是:﹣(﹣2)=2,故选:B.【点评】本题考查了相反数的意义,一个数的相反数就是在这个数前面添上“﹣”号:一个正数的相反数是负数,一个负数的相反数是正数,0的相反数是0.不要把相反数的意义与倒数的意义混淆.2.【分析】根据轴对称图形的概念求解.【解答】解:A.不是轴对称图形,故此选项不合题意;B.不是轴对称图形,故此选项不合题意;C.是轴对称图形,故此选项符合题意;D.不是轴对称图形,故此选项不合题意.故选:C.【点评】本题考查了轴对称图形,关键是掌握好轴对称图形的概念,轴对称图形的关键是寻找对称轴,图形两部分折叠后可重合.3.【分析】根据平行线的性质,可以得到∠1=∠2,然后根据∠1的度数,即可得到∠2的度数.【解答】解:∵a∥b,∴∠1=∠2,∵∠1=115°,∴∠2=115°,故选:A.【点评】本题考查平行线的性质,解答本题的关键是明确题意,利用平行线的性质解答.4.【分析】直接由图形可得出结果.【解答】解:由图形可知,在这一时段内心跳速度最快的时刻约为9时,故选:C.【点评】本题主要考查了折线统计图的意义,理解横纵轴表示的意义是解题的关键.5.【分析】根据两三角形位似,周长比等于相似比即可求解.【解答】解:∵△ABC与△DEF位似,点O是它们的位似中心,且相似比为1:2,∴△ABC与△DEF的周长之比是1:2,故选:A.【点评】本题考查了位似三角形的性质,明确两三角形位似,周长比等于相似比是解题的关键.6.【分析】根据前面三个图案中菱形的个数,得出规律,第n个图案中菱形有(2n﹣1)个,从而得出答案.【解答】解:由图形知,第①个图案中有1个菱形,第②个图案中有3个菱形,即1+2=3,第③个图案中有5个菱形即1+2+2=5,……则第n个图案中菱形有1+2(n﹣1)=(2n﹣1)个,∴第⑥个图案中有2×6﹣1=11个菱形,故选:C.【点评】本题主要考查了图形的变换规律,归纳出第n个图案中菱形的个数为2n﹣1,是解题的关键.,体现了从特殊到一般的数学思想.7.【分析】用夹逼法估算无理数的大小即可得出答案.【解答】解:∵49<54<64,∴7<<8,∴3<﹣4<4,故选:D.【点评】本题考查了估算无理数的大小,无理数的估算常用夹逼法,用有理数夹逼无理数是解题的关键.8.【分析】第三年的植树量=第一年的植树量×(1+年平均增长率)2,把相关数值代入即可.【解答】解:根据题意得:400(1+x)2=625,故选:B.【点评】考查列一元二次方程解决实际问题,读懂题意,找到等量关系列方程是解决本题的关键.9.【分析】利用正方形的对角线互相垂直平分且相等,等腰直角三角形的性质,三角形的内角和定理和全等三角形的判定与性质解答即可.【解答】解:∵ABCD是正方形,∴∠AOB=∠AOD=90°,OA=OB=OD=OC.∵OE=OF,∴△OEF为等腰直角三角形,∴∠OEF=∠OFE=45°,∵∠AFE=25°,∴∠AFO=∠AFE+∠OFE=70°,∴∠FAO=20°.在△AOF和△BOE中,,∴△AOF≌△BOE(SAS).∴∠FAO=∠EOB=20°,∵OB=OC,∴△OBC是等腰直角三角形,∴∠OBC=∠OCB=45°,∴∠CBE=∠EBO+∠OBC=65°.故选:C.【点评】本题主要考查了正方形的性质,等腰直角三角形的判定与性质,全等三角形的判定与性质,三角形的内角和定理,熟练掌握正方形的性质是解题的关键.10.【分析】连结OC,根据切线的性质得到∠PCO=90°,根据OC=OA,得到∠A=∠OCA,根据AC=PC,得到∠P=∠A,在△APC中,根据三角形内角和定理求得∠P=30°,根据含30度角的直角三角形的性质得到OP=2OC=2r,在Rt△POC中,根据tan P=求出⊙O的半径r即可得出答案.【解答】解:如图,连结OC,∵PC是⊙O的切线,∴∠PCO=90°,∵OC=OA,∴∠A=∠OCA,∵AC=PC,∴∠P=∠A,设∠A=∠OCA=∠P=x°,在△APC中,∠A+∠P+∠PCA=180°,∴x+x+90°+x=180°,∴x=30°,∴∠P=30°,∵∠PCO=90°,∴OP=2OC=2r,在Rt△POC中,tan P=,∴=,∴r=3,∴PB=OP﹣OB=2r﹣r=r=3.故选:D.【点评】本题考查了切线的性质,体现了方程思想,在△APC中,根据三角形内角和定理求得∠P=30°是解题的关键.11.【分析】解分式方程得得出x=a﹣2,结合题意及分式方程的意义求出a>2且a≠5,解不等式组得出,结合题意得出a≤7,进而得出2<a≤7且a≠5,继而得出所有满足条件的整数a的值之和,即可得出答案.【解答】解:解分式方程得:x=a﹣2,∵x>0且x≠3,∴a﹣2>0且a﹣2≠3,∴a>2且a≠5,解不等式组得:,∵不等式组的解集为y≥5,∴<5,∴a<7,∴2<a<7且a≠5,∴所有满足条件的整数a的值之和为3+4+6=13,故选:A.【点评】本题考查了分式方程的解,解一元一次不等式组,解一元一次不等式,一元一次不等式的整数解,正确求解分式方程,一元一次不等式组,一元一次不等式是解决问题的关键.12.【分析】根据括号前是“+”,添括号后,各项的符号都不改变判断①;根据相反数判断②;通过例举判断③.【解答】解:①如(x﹣y)﹣z﹣m﹣n=x﹣y﹣z﹣m﹣n,(x﹣y﹣z)﹣m﹣n=x﹣y﹣z ﹣m﹣n,故①符合题意;②x﹣y﹣z﹣m﹣n的相反数为﹣x+y+z+m+n,不论怎么加括号都得不到这个代数式,故②符合题意;③第1种:结果与原多项式相等;第2种:x﹣(y﹣z)﹣m﹣n=x﹣y+z﹣m﹣n;第3种:x﹣(y﹣z)﹣(m﹣n)=x﹣y+z﹣m+n;第4种:x﹣(y﹣z﹣m)﹣n=x﹣y+z+m﹣n;第5种:x﹣(y﹣z﹣m﹣n)=x﹣y+z+m+n;第6种:x﹣y﹣(z﹣m)﹣n=x﹣y﹣z+m﹣n;第7种:x﹣y﹣(z﹣m﹣n)=x﹣y﹣z+m+n;第8种:x﹣y﹣z﹣(m﹣n)=x﹣y﹣z﹣m+n;故③符合题意;正确的个数为3,故选:D.【点评】本题考查了整式的加减,解题的关键是注意可以添加1个括号,也可以添加2个括号.二.填空题(共4个小题,每小题4分,共16分)请将每小题的答案直接填在答题卡中对应的横线上.13.【分析】根据绝对值的性质和零指数幂的性质计算可得答案.【解答】解:原式=2+1=3.故答案为:3.【点评】本题考查实数的运算,熟练掌握实数的运算性质是解题关键.14.【分析】画树状图,共有9种等可能的结果,其中两次摸出的球都是红球的结果有4种,再由概率公式求解即可.【解答】解:画树状图如下:共有9种等可能的结果,其中两次摸出的球都是红球的结果有4种,∴两次摸出的球都是红球的概率为,故答案为:.【点评】此题考查的是用树状图法求概率.树状图法可以不重复不遗漏的列出所有可能的结果,适合两步或两步以上完成的事件;解题时要注意此题是放回试验还是不放回试验.用到的知识点为:概率=所求情况数与总情况数之比.15.【分析】先根据锐角三角函数求出∠AEB=30°,再根据扇形面积公式求出阴影部分的面积.【解答】解:∵以B为圆心,BC的长为半径画弧,交AD于点E,∴BE=BC=2,在矩形ABCD中,∠A=∠ABC=90°,AB=1,BC=2,∴sin∠AEB==,∴∠AEB=30°,∴∠EBA=60°,∴∠EBC=30°,∴阴影部分的面积:S==π,故答案为:π.【点评】本题考查有关扇形面积的相关计算、矩形的性质,掌握扇形面积公式和矩形的性质的应用,其中根据锐角三角函数求出角的度数是解题关键.16.【分析】先根据比例设该店五月份销售桃片、米花糖、麻花的数量分别为x,3x,2x,每包麻花的成本为y元,每包米花糖的成本为a元,则每包桃片的成本是2y元,由三种特产的总利润是总成本的25%列方程可得=,从而解答此题.【解答】解:设该店五月份销售桃片、米花糖、麻花的数量分别为x,3x,2x,每包麻花的成本为y元,每包米花糖的成本为a元,则每包桃片的成本是2y元,由题意得:20%•2y•x+30%•a•3x+20%•y•2x=25%(2xy+3ax+2xy),15a=20y,∴=,则每包米花糖与每包麻花的成本之比为4:3.故答案为:4:3.【点评】本题考查三元高次方程的应用,解本题要理解题意,通过找出等量关系即可求解.三.解答题(共2个小题,每小题8分,共16分)17.【分析】(1)根据平方差公式、单项式乘多项式可以解答本题;(2)根据分式的加法和除法可以解答本题.【解答】解:(1)(x+y)(x﹣y)+y(y﹣2)=x2﹣y2+y2﹣2y=x2﹣2y;(2)原式=÷=•=.【点评】本题考查分式的混合运算、平方差公式和单项式乘多项式,解答本题的关键是明确它们各自的计算方法.18.【分析】根据矩形的性质、垂直的定义得出∠F=∠ADC=90°,再根据EF∥BC,推出∠1=∠2,进而证明△ADC≌△CFA(AAS),同理可得:④△ADB≌△BEA(AAS),最后得出三角形的面积公式为S=ah.【解答】证明:∵AD⊥BC,∴∠ADC=90°.∵∠F=90°,∴∠ADC=∠F,∵EF∥BC,∴∠1=∠2,∵AC=AC,在△ADC与△CFA中,∴△ADC≌△CFA(AAS).同理可得:④△ADB≌△BEA(AAS),=S△ADC+S△ABD=S矩形ADCF+S矩形AEBD=S矩形BCFE=ah.∴S△ABC故答案为:①∠ADC=∠F,②∠1=∠2,③AC=AC,④△ADB≌△BEA(AAS).【点评】本题主要考查了基本作图、全等三角形、矩形的判定与性质,掌握5种基本作图,全等三角形、矩形的判定与性质的应用,其中全等的证明是解题关键.三.解答题(共7个小题,每小题10分,共70分)19.【分析】(1)根据众数的定义可求出七年级学生的课外阅读时长的众数,即a的值;根据中位数的定义可求出八年级学生的课外阅读时长的中位数,即b的值,根据频率=可求出八年级学生的课外阅读时长在8小时及以上所占百分比,即C的值;(2)求出样本中七年级学生课外阅读时长在9小时及以上的学生所占的百分比,即可估计总体中所占的百分比,进而求出相应人数;(3)由中位数、众数的比较得出结论.【解答】解:(1)七年级学生的课外阅读时长出现次数最多的是8小时,因此七年级学生的课外阅读时长的众数是8小时,即a=8;将八年级学生的课外阅读时长从小到大排列,处在中间位置的两个数的平均数为=8.5,因此中位数是8.5小时,即b=8.5;c=×100%=65%,故答案为:8,8.5,65%;(2)400×=160(人),答:七年级在主题周活动期间课外阅读时长在9小时及以上的大约有160人;(3)八年级参与的积极性更高,理由:八年级学生课外阅读时长的中位数,众数均比七年级的高.【点评】本题考查中位数、众数、平均数以及样本估计总体,理解中位数、众数的定义是正确解答的前提.20.【分析】(1)将A,B两坐标先代入反比例函数求出m,n,然后由待定系数法求函数解析式.(2)根据直线在曲线下方时x的取值范围求解.(3)由直线解析式求得C点的坐标,然后根据三角形面积公式即可求解.【解答】解:(1)∵(m,4),(﹣2,n)在反比例函数y=的图象上,∴4m=﹣2n=4,解得m=1,n=﹣2,∴A(1,4),B(﹣2,﹣2),把(1,4),(﹣2,﹣2)代入y=kx+b中得,解得,∴一次函数解析式为y=2x+2.画出函数y=2x+2图象如图:(2)由图象可得当0<x<1或x<﹣2时,直线y=﹣2x+6在反比例函数y=图象下方,∴kx+b<的解集为x<﹣2或0<x<1.(3)把y=0代入y=2x+2得0=2x+2,解得x=﹣1,∴点C坐标为(﹣1,0),==2.∴S△AOC【点评】本题考查反比例函数与一次函数的交点问题,解题关键是掌握函数与方程及不等式的关系.21.【分析】(1)根据题意可知:甲原来工作5天的工作量+后来2天的工作量=600,可以列出相应的方程,然后求解即可;(2)根据题意可知:甲、乙施工的长度都是900米,再根据题意可知,两个工程队施工天数相同,即可列出相应的分式方程,然后求解即可,注意分式方程要检验.【解答】解:(1)设甲施工队增加人员后每天修建灌溉水渠x米,则原计划每天施工(x ﹣20)米,由题意可得:5(x﹣20)+2x=600,解得x=100,答:甲施工队增加人员后每天修建灌溉水渠100米;(2)设乙施工队原来每天修建灌溉水渠m米,则技术更新后每天修建水渠m(1+20%)=1.2m米,由题意可得:,解得m=90,经检验,m=90是原分式方程的解,答:乙施工队原来每天修建灌溉水渠90米.【点评】本题考查一元一次方程的应用、分式方程的应用,解答本题的关键是明确题意,找出等量关系,列出相应的分式方程和一元一次方程.22.【分析】(1)延长CB到D,则CD⊥AD于点D,根据题意可得∠NAC=∠CAB=30°,BC=900米,BC∥AN,所以∠C=∠NAC=30°=∠BAD,然后根据含30度角的直角三角形即可解决问题;(2)设快艇在x分钟内将该游客送上救援船,根据救援船的平均速度为150米/分,快艇的平均速度为400米/分,列出方程150x+(400x﹣900)=1559,进而可以解决问题.【解答】解:(1)如图,延长CB到D,则CD⊥AD于点D,根据题意可知:∠NAC=∠CAB=30°,BC=900米,BC∥AN,∴∠C=∠NAC=30°=∠BAD,∴AB=BC=900米,∵∠BAD=30°,∴BD=450米,∴AD=BD=450(米),∴AC=2AD=900≈1559(米)答:湖岸A与码头C的距离约为1559米;(2)设快艇在x分钟内将该游客送上救援船,∵救援船的平均速度为150米/分,快艇的平均速度为400米/分,∴150x+(400x﹣900)=1559,∴x≈4.5,答:快艇能在5分钟内将该游客送上救援船.【点评】本题考查了解直角三角形的应用﹣方向角问题,解决本题的关键是掌握方向角定义.23.【分析】(1)根据“和倍数”的定义依次判断即可;(2)设A=(a+b+c=12,a>b>c),根据“和倍数”的定义表示F(A)和G(A),代入中,根据为整数可解答.【解答】解:(1)∵357÷(3+5+7)=357÷15=23……12,∴357不是“和倍数”;∵441÷(4+4+1)=441÷9=49,∴441是9的“和倍数”;(2)设A=(a+b+c=12,a>b>c),由题意得:F(A)=,G(A)=,∴===,∵a+c=12﹣b,为整数,∴====7+(1﹣b),∵1<b<9,∴b=3,5,7,∴a+c=9,7,5,3,①当b=3,a+c=9时,(舍),,则A=732或372;②当b=5,a+c=7时,,则A=156或516;③当b=7,a+c=5时,此种情况没有符合的值;综上,满足条件的所有数A为:732或372或156或516.【点评】本题考查了新定义问题,根据新定义问题进行计算是解题关键.24.【分析】(1)将点A、B坐标分别代入抛物线解析式,解方程即可;(2)利用△AQM∽△AOB,得MQ:AQ:AM=3:4:5,则PM+,设P (m,﹣),M(m,﹣),Q(m,0),用含m的代数式表示出PM+2MQ,利用二次函数的性质可得答案;(3)根据原来抛物线和新抛物线的对称轴知,抛物线向右平移个单位,则平移后抛物线解析式为y'=﹣,设D(4,t),C(c,﹣),分AP'与DC为对角线或P'D与AC为对角线或AD与P'C为对角线,分别利用中点坐标公式可得方程,从而解决问题.【解答】解:(1)∵抛物线y=﹣x2+bx+c与x轴交于点A(4,0),与y轴交于点B(0,3).∴,∴.∴抛物线的函数表达式为y=﹣;(2)∵A(4,0),B(0,3),∴OA=4,OB=3,由勾股定理得,AB=5,∵PQ⊥OA,∴PQ∥OB,∴△AQM∽△AOB,∴MQ:AQ:AM=3:4:5,∴AM=,,∴PM+,∵B(0,3),A(4,0),∴l AB:y=﹣,∴设P(m,﹣),M(m,﹣),Q(m,0),∴PM+2MQ=﹣=﹣,∵﹣,∴开口向下,0<m<4,∴当m=1时,PM+的最大值为,此时P(1,);(3)由y=﹣知,对称轴x=,∴P'(2,),∵直线l:x=4,∴抛物线向右平移个单位,∴平移后抛物线解析式为y'=﹣,设D(4,t),C(c,﹣),①AP'与DC为对角线时,,∴,∴D(4,),②P'D与AC为对角线时,,∴,∴D(4,﹣),③AD与P'C为对角线时,,∴,∴D(4,),综上:D(4,)或(4,﹣)或(4,).【点评】本题是二次函数综合题,主要考查了二次函数的图象与性质,待定系数法求函数解析式,相似三角形的判定与性质,平行四边形的判定与性质等知识,根据平行四边形的顶点坐标,利用中点坐标公式列方程是解题的关键,同时注意分类讨论.25.【分析】(1)连接CP,判断出△FCG为等腰直角三角形,进而判断出CP⊥FG,进而得出DP=BC,再求出BC,即可求出答案;(2)过点E作EH⊥AE交AD的延长线于H,先判断出△EGA≌△EFH(SAS),得出AG=FH,∠EAG=∠H=45°,进而判断出△AGN≌△AMF(AAS),即可得出结论;(3)先求出BE=,再判断出点B'是以点E为圆心,为半径的圆上,再判断出点G在点A右侧过点A与AD垂直且等长的线段上,进而得出EF最大时,B'G最小,即可求出答案.【解答】(1)解:如图1,连接CP,由旋转知,CF=CG,∠FCG=90°,∴△FCG为等腰直角三角形,∵点P是FG的中点,∴CP⊥FG,∵点D是BC的中点,∴DP=BC,在Rt△ABC中,AB=AC=2,∴BC=AB=4,∴DP=2;(2)证明:如图2,过点E作EH⊥AE交AD的延长线于H,∴∠AEH=90°,由旋转知,EG=EF,∠FEG=90°,∴∠FEG=∠AEH,∴∠AEG=∠HEF,∵AB=AC,点D是BC的中点,∴∠BAD=∠CAD=∠BAC=45°,∴∠H=90°﹣∠CAD=45°=∠CAD,∴AE=HE,∴△EGA≌△EFH(SAS),∴AG=FH,∠EAG=∠H=45°,∴∠EAG=∠BAD=45°,∵∠AMF=180°﹣∠BAD﹣∠AFM=135°﹣∠AFM,∵∠AFM=∠EFH,∴∠AMF=135°﹣∠EFH,∵∠HEF=180°﹣∠EFH﹣∠H=135°﹣∠EFH,∴∠AMF=∠HEF,∵△EGA≌△EFH,∴∠AEG=∠HEF,∵∠AGN=∠AEG,∴∠AGN=∠HEF,∴∠AGN=∠AMF,∵GN=MF,∴△AGN≌△AMF(AAS),∴AG=AM,∵AG=FH,∴AM=FH,∴AF+AM=AF+FH=AH=AE;(3)解:∵点E是AC的中点,∴AE=AC=,根据勾股定理得,BE==,由折叠直,BE=B'E=,∴点B'是以点E为圆心,为半径的圆上,由旋转知,EF=EG,∴点G在点A右侧过点A与AD垂直且等长的线段上,∴B'G的最小值为B'E﹣EG,要B'G最小,则EG最大,即EF最大,∵点F在AD上,∴点F在点A或点D时,EF最大,最大值为,∴线段B′G的长度的最小值﹣.【点评】此题是几何变换综合题,主要考查了旋转的性质,全等三角形的判定和性质,等腰直角三角形的判定和性质,勾股定理,等腰三角形的性质,作出辅助线构造出全等三角形是解本题的关键.。

内蒙古包头市2020年小学语文趣味知识竞赛试卷(8)B卷

内蒙古包头市2020年小学语文趣味知识竞赛试卷(8)B卷

内蒙古包头市2020年小学语文趣味知识竞赛试卷(8)B卷姓名:________ 班级:________ 成绩:________亲爱的同学,经过一段时间的学习,你们一定学到不少知识,今天就让我们大显身手吧!一、选择题 (共7题;共14分)1. (2分)下列句子中下划线的词语运用错误的一项是()。

A . 草原上行车十分飘逸,只要方向不错,怎么走都可以。

初入草原,听不见一点儿声音,也看不见什么东西,除了一些忽飞忽落的小鸟。

B . 我微睡时,黑夜星空的千万颗亮晶晶的眼睛对我察看;我醒来时,白昼的那只硕大无朋的独眼向我凝视。

C . 下午三点整,会场上爆发出一阵排山倒海的掌声,中华人民共和国中央人民政府主席毛泽东出现在主席台上,跟群众见面了。

三十万人的目光一齐投向主席台。

D . 他把头靠在胸墙上,望着漆黑的夜空,完全陷入了对未来的憧憬里。

2. (2分)下面代称的含义有误的一组是()。

A . “杏林”指教师;“桃李”指学生(指自己所教的学生);“肝胆”指真心B . “杜康”指美酒;“高足”指学生(敬称别人的学生);“手足”指弟兄C . “汗青”指史册;“红豆”指相思;“千金”指女儿(敬称别人的女儿)3. (2分)下列句子的朗读节奏划分正确的是()A . 孔子东游,见/两小儿/辩斗,问其故。

B . 我以/日始出时/去人近,而/日中时/远也。

C . 此不为/远者小/而/近者大乎?D . 孰/为汝/多知∕乎?4. (2分)下列句子运用说明方法正确的一项是()人民英雄纪念碑从地面到达碑顶高达37.94米,有10层楼那么高,比天安门还高4.24米。

A . 列数字和打比方B . 列数字和举例子C . 列数字和作比较D . 举例子和作比较5. (2分)在下面这段文字中,莱特哥哥说的一句话是()美国莱特兄弟于1903年12月17日,驾驶动力飞机成功地遨游蓝天。

人们为此举行盛大的酒会,主持人要莱特兄弟发表演说,兄弟俩再三推辞,主持人执意邀请,哥哥便发表了言短意深的一句话演说:“_____________________”A . 据我所知,鸟中最会说话的是鹦鹉,而鹦鹉学舌是被人看不起的。

Unit 8(B卷·能力提升)-【单元测试】八年级英语上册分层训练AB卷(冀教版)(解析版)

Unit 8(B卷·能力提升)-【单元测试】八年级英语上册分层训练AB卷(冀教版)(解析版)

班级姓名学号分数Unit8 Celebrating Me!单元测试(B卷·能力提升)(时间:60分钟,满分:90分)一、单项选择(共10小题,计10分)( )1 Both Li Ming and I are _________ our school football team.A.ofB.atC.toD.on( )2 [2021·河北保定清苑区校级期末]—All of you speak such good English. Who taught you?—Nobody. We learned it by_________ .A.weC.oursD.ourselves( )3 Scientists say that banana trees may disappear(消失) from the world _________ the banana cancer.A.because ofB.instead ofC.as forD.together with( )4 This morning I _________ a gift from my sister, but I didn’t it.A.received;acceptB.accepted;acceptC.received;receiveD.accepted;receive ( )5 Greg has such a good_________ , and he has won many singing competitions.A.sleepB.soundC.voiceD.noise( )6 [2020·北京中考]Zhaozhou Bridge is one of _________stone bridges in the world.A.oldB.olderC.oldestD.the oldest( )7 He lost his key. It made him _________ outside to wait for his wife.A.to stayB.stayedC.staysD.stay( )8 —I find it difficult to learn English well. I want to drop it.—English is very important in our daily life. Never_________ .A.give up itB.give it upC.give away itD.give it away( )9 When I passed by the classroom, I noticed my friend Lynn _________history books. A.read B.to read C.reading D.reads( )10 —Thank you for showing me the way, young man!—_________.A.No problemB.It doesn’t matterC.It’s my pleasureD.It’s very kind of you二、完形填空(共10小题;每小题2分,计20分)Dear Michael,I am glad to learn that you have been chosen(被选择) to study in China. Your dream has come true!I can well remember that you 11China for the first time when you were nine. Since you returned, you have been interested in Chinese culture and have 12 a lot of time learning Chinese. When you first started to learn Chinese, I 13it was nothing but a passing fad(一时的狂热). However, you didn’t 14halfway, but kept on learning and did a good job in the HSK(汉语水平考试). Now you finally got what you had 15for a long time. You got the chance to 16life in China for one year. You should have it, my son, for chances only come to those who are 17.When you study there, you will have to face 18in daily life that you have never experienced before, but after a year abroad(在国外), you will return with a new look at life—and at 19. Your mum and I are both 20you. Keep it up, my son!Love,Dad()11.A.built B.visited C.missed D.changed()12.A.taken B.brought C.spent D.cost()13.A.thought B.agreed C.forgot D.added()14.A.wake up B.grow up C.turn up D.give up()15.A.written B.wanted C.hated D.broken()16.A.introduce B.experience C.invent D.imagine()17.A.ready B.stupid C.spare D.round()18.A.examples B.meetings C.challenges D.dreams()19.A.yourself B.myself C.himself D.herself()20.A.different from B.bad for C.good at D.proud of三、阅读理解(共10小题,计20分)AAs I put down my guitar and finished my song, I heard people clapping. I knew my show was successful.Two weeks later, I got into the final. Looking at the crowded(拥挤的) school hall, I felt nervous. As I waited for my turn to perform, I told myself, “It should be fine, and it will just be like the last show.”Then I heard the host calling my name and I went on the stage. I looked at the audience(观众). It was noisy and then became quiet. I started playing the guitar and singing.Suddenly, the guitar got broken. I stopped singing and didn’t know what to do. At that time, I heard one boy shouting, “You can do it!”And then everyone started shouting. I took a deep breath and sang again.Many people told me I did a great job after my performance. I was glad to hear that. Of course I didn’t win the final, but it was a great experience(经历) to me.21 What does the underlined word “successful”mean in English in Paragraph 1?A.Terrible.B.Bad.C.Boring.D.Excellent.22 Where did the final take place?A.In the school hall.B.At the cinema.C.In the library.D.On the playground.23 What happened when the writer was singing?A.All people left.B.The guitar was broken.C.A boy shouted suddenly.D.The stage became dark.24 What can we learn from the passage?A.A lot of students and parents joined the show.B.The writer forgot the song on the stage.C.The audience encouraged the writer to finish the song.D.The writer got a job after the show.25 Which is the best title of the passage?A.A perfect showB.A great jobC.My first performanceD.My show experienceBWhen you finish high school or university, is learning done? The answer is “no.”In many countries, people continue learning all their lives. Why is lifelong learning important? How can it help you? Let's look at one example of lifelong learning in Japan.Why is lifelong learning important? You go to school and learn. You take tests. But learning doesn't only happen in school. And learning doesn't stop when you graduate from high school or college. You are learning all the time. For example, learning can happen when you go to a museum. It can also happen when you get a job.You learn when you play a sport or when you take a trip. Learning is life! We never stop learning. Every day, you can improve yourself by learning something new. Lifelong learning in Japan.In Japan, lifelong learning is very important. People in Japan like to try new learning activities. Music, calligraphy, flower arranging, and foreign languages are some of their favorite classes. The Japanese take classes to improve their skills and learn new things. When we graduate from school, we can continue to learn. Make lifelong learning one of your goals!26.Why is lifelong learning important?A.It helps you improve yourself.B.It's the best way to learn.C.It's fun and easy.D.It's an important goal.47. Some people in Japan take foreign language classes to ________.A.get a job B.learn new thingsC.get good grades D.finish college28.Which of the following is TRUE according to the passage?A.Learning only happens in school.B.When we graduate from school, learning is done.C.You can't learn anything when you play a sport.D.Music, calligraphy, flower arranging and foreign languages arepopular classes in Japan.29.We can learn________.A.in school B.in collegeC.at work D.All of the above.30. What is the main idea of the passage?A.Learning can be fun.B.We are always learning in school.C.Finishing high school is important.D.People can learn all their lives.三、词语运用(共10小题;每小题1分,计10分)We know everyone should be confident in his or her study and work. Self-confident is very important to 31_________ (we). We can do nothing well 32 _________ it.Madame Curie once said, “Life is not 33_________ (easy) for any of us. We must work, and above all, we must believe in 34_________ (we).” With the support of self-confidence, Madame Curie discovered the element radium(镭元素) and 35_________ (make) great contributions(贡献) to science. And this is true of many other36_________ (scientist) like Einstein and Darwin. However, in our 37 _________(day) life, there are many people who often complain(抱怨) that they are not afford to do things 38_________ (good) at all. 39 _________ fact, what they need most is self-confidence. So anyone, no matter what he does, should believe in himself. Only self-confidence can help him to work on and 40_________ (final) succeed(成功). So try to be confident and we’ll have a successful future.五、任务型阅读Many people have their dreams at home and abroad. During China’s Ming Dynasty, there was a man named Wan Hu. His dream in life was “flying to the moon”. One day, he tied himself to a chair with 47 self-made “rockets” and held a big kite in his hands. He lit the “rockets” and disappeared into the sky. Unfortunately, he died when the “rockets” exploded(爆炸).Hundreds of years later, in 1969, American astronaut(宇航员) Neil Armstrong stepped down from Apollo Ⅱ and walked on the moon. He was the first man to set foot on the moon. It was a great dream. It was also Wan Hu’s dream. To remember Wan, there is a crater(环形山) on the far side of the moon which is named after him.There are many people like Wan in the world. They never stop making their dreams come true.American civil rights(民权) leader Martin Luther King once said, “I have a dream”. His dream helped American people of all races(种族) get the same rights. Though others laughed at him, Henry Ford had a dream of cars covering the roads instead of horses and carts. Seeing hungry people, Yuan Longping invented the hybrid rice for his dream of “feeding everybody in China”. Dreams are important because they give us directions for our lives. With dreams, we set goals and make plans to change our present situations. So we can always change the world for the better. Let’s work harder for our dreams.41题完成句子;42、43题简略回答问题;44题找出并写下第三段的主题句;45题将文中画线句子译成汉语。

2023届T8新高考B卷语文试卷(教师版)

2023届T8新高考B卷语文试卷(教师版)

2023届T8新高考B卷语文试卷(教师版)一、现代文阅读(35分)(一)现代文阅读I(本题共5小题,17分)阅读下面的文字,完成1-5题。

材料一:大运河文化的特质是什么?目前有“生生不息”说、“融合”说;亦有包容性、统一性、扩散性、开放性、凝聚性等解释,不一而足。

以上见解在文化功能论、文化象征论的框架中展开,既体现了不同学者对大运河文化内涵认识角度、学术立场、学科背景及认知层次的差异,也说明大运河本身的复杂性、系统性及跨学科等特点。

“千年运河、沟通南北”是大运河区别于长城、黄河的重要特点,在“千年”与“南北”所建立的时空之中,运河“沟通”的功能最为显著。

当下,大运河既是国家文化符号,又以世界文化遗产的身份成为一种文化标签。

兼具运输功能、生活场域功能和文化象征意义的“大运河”,不仅是一条“经纬中国、运通华夏”的河流,还是一种“利器明德,以厚民性”的文化。

“联通”是运河人工开挖并利用自然河道联江达海以通四域的功能。

封山浚川、连接江河湖海是中国传统“天下观”和帝王交通天下的文化理想。

自春秋以来,各级各类政权所不断进行的开凿运河的实践,正体现了对这一文化理想的不懈追求。

大运河不仅从空间上拉近了中国南北的距离,更从国家战略格局上促进了传统经济格局和政治地缘格局的改变,部分解决了集权政治的稳定性、区域地方社会发展的不平衡性等问题,保证了国家统一和安全。

“流通”是运河因联通而带来的物流与信息传播,以及进而形成的社会流动。

漕运是运河最重要的流通功能。

所谓“漕”者,与车运相对,“车运谷曰转,水运谷曰漕”。

与浙东运河相连的“海上丝绸之路”在南宋逐渐取代了汉唐以来的“陆上丝绸之路”,形成了新的世界范围内的物资流通渠道。

明代中后期的大运河已成为一个磁场,吸附着各层次人群作南北流动。

人们利用大运河所提供的交通和通信之便打开了地方间的经济联系。

“变通”指运河本体、漕运制度“穷”则变、变则通的进程及其所折射出的技术更新与观念变革。

2022年学历教育-专接本-大学英语考试全真模拟易错、难点剖析B卷(带答案)第8期

2022年学历教育-专接本-大学英语考试全真模拟易错、难点剖析B卷(带答案)第8期

2022年学历教育-专接本-大学英语考试全真模拟易错、难点剖析B卷(带答案)一.综合题(共15题)1.单选题Mrs. Smith has made _______ clear that smoking is not allowed in the school.问题1选项A.thatB.thisC.whichD.it【答案】D【解析】【考点】本题考查it的用法。

【选项释义】A. that 那,那个;B. this 这,这个;C. which 哪一个;D. it 它(在一些特殊情况下可做形式主语或形式宾语)。

【解题思路】make在此处为使役动词,后可接it作形式宾语,再接形容词clear作宾补,最后接that 引导的宾语从句作真正的宾语,即“make+it+clear+that引导的宾语从句”,意为“讲清楚……”。

因此此处应填it,作形式宾语,故本题选D。

【干扰项排除】A、B、C选项均不符合题干的语法结构。

【句意】史密斯夫人已经讲清楚学校不允许吸烟。

2.单选题You must ____the cigarette before going into the plant. It’s the rule.问题1选项A.put upB.put outC.put offD.put on【答案】B【解析】【考点】本题考查词义辨析。

【选项释义】A. put up 建造,张贴;B. put out 熄灭,扑灭;C. put off 推迟,延迟;D. put on 穿上,戴上。

【解题思路】本题根据空处后的cigarette以及整句的句意可知,四个选项中只有B选项带入句中,句意通顺:“你必须把烟熄灭”。

故本题选B。

【干扰项排除】A、C、D选项均不符合句意。

【句意】进入工厂前你必须把烟熄灭。

这是规定。

3.单选题We’ll stay at home tomorrow _______ it rains.问题1选项A.andB.ifC.butD.so【答案】B【解析】【考点】本题考查状语从句。

重庆2018B卷中考数学试题及答案

重庆2018B卷中考数学试题及答案

重庆2018B卷中考数学试题及答案2018年,重庆市举行了中考数学试卷B卷,这份试卷在考试中发挥了重要的作用。

本文将详细介绍重庆2018B卷中考数学试题及答案,帮助考生更好地了解试题内容并提高解题水平。

一、选择题部分1. 已知函数 f ( x ) = ∣ x − 4 ∣,则 f ( x ) = 0 的解为:A. x = 4B. x ≠ 4C. x = 0D. x = 8答案:A. x = 42. 设集合 A = { 1 , 2 , 3 } ,则集合 A 的幂集的元素个数为:A. 1B. 2C. 3D. 4答案:D. 43. 若 a + b = 3 , a - b = 1 ,则 a 的值为:A. 1B. 2C. 3D. 4答案:B. 2二、填空题部分1. 解方程 | 2x + 5 | = 10 的解为 x = ______。

答案:-7 或 2.52. 若 A = { 1 , 2 , 3 } , B = { 2 , 3 , 4 } ,则A ∩ B = ______。

答案:{ 2 , 3 }三、解答题部分1. 题目:已知函数 f ( x ) = 2x² - 3x + 1 ,求函数的对称轴和顶点坐标。

解答:对称轴的横坐标可通过公式 x = -b / 2a 求得,其中 a 为二次项系数,b 为一次项系数。

代入 f ( x ) 的系数得到 x = 3/4,所以对称轴的横坐标为 3/4。

将横坐标代入函数 f ( x ) 中,即可求得对称轴的纵坐标。

对称轴纵坐标的计算过程如下:f ( 3/4 ) = 2(3/4)² - 3(3/4) + 1= 9/8 - 9/4 + 1= 9/8 - 18/8 + 8/8= -1/8所以对称轴的坐标为 ( 3/4 , -1/8 )。

顶点坐标即为对称轴的坐标,所以顶点坐标为 ( 3/4 , -1/8 )。

2. 题目:已知集合 A = { 1 , 2 , 3 } , B = { 2 , 3 , 4 } ,求 A ∪ B。

Unit8(B卷·能力提升)-【单元测试】七年级英语下册分层训练AB卷(牛津译林版)(解析版)

Unit8(B卷·能力提升)-【单元测试】七年级英语下册分层训练AB卷(牛津译林版)(解析版)

班级姓名学号分数Unit 8 Pets 单元测试(B卷·能力提升)(时间:60分钟,满分:100分)一、单项选择(本题共10小题,每小题1.5分,共15分。

)1.There are ________ in the reading room, but some aren’t ________ for the students to read. A.enough books; easy enough B.enough books; enough easyC.books enough; easily enough D.books enough; enough easily 2.Jenny, do you have ________ to tell me?A.anything important B.important anythingC.something important D.important something3.My mother is always ________ me because I can’t look after myself.A.worry B.worry about C.worried D.worried about 4.—Did you have a good time yesterday?—We had planned to play basketball, but it rained heavily. ________, we had to stay at home. A.First of all B.On the one hand C.At least D.As a result 5.There is ________ in today’s newspaper.A.something interesting B.interesting somethingC.something interested D.interesting nothing6.—Do you watch Peppa Pig on TV? It’s so funny!— Well, no, to be __________, I think it’s quite silly.A.curious B.brave C.gentle D.honest 7.—Why does Mike sit in the front?—Because he sees the words _______ at the back.A.less noisily B.more noisily C.less clearly D.more clearly 8.(精选·山东临沂) We couldn’t buy anything because ______ of the shops were open. A.all B.bothC.nothing D.none9.Lily her room every day, so her room is very .A.clean; clean B.cleans; cleans C.clean; cleans D.cleans; clean 10.—I feel very ________. May I have a cake?—Sure, you may take one from the fridge.A.brave B.thirsty C.full D.hungry二、完形填空(本题共10小题,每小题1.5分,共15分。

2023年重庆市中考数学试卷(B卷)及答案解析

2023年重庆市中考数学试卷(B卷)及答案解析

2023年重庆市中考试卷(B卷)数学注意事项:1.本试卷共7页,满分为120分。

考试时间为120分钟。

2.答题前,考生务必先将自己的考生号、姓名、座位号等信息填写在试卷和答题卡的指定位置。

请认真核对条形码上的相关信息后,将条形码粘贴在答题卡的指定位置上。

3.答选择题时,必须使用2B铅笔将答题卡上对应题目的答案标号涂黑,修改时用橡皮擦干净,再选涂其他各案。

4.答非选择题时,必须使用0.5毫米的黑色字迹签字笔书写,作图题可先用铅笔绘出,确认后再用0.5毫米的黑色字迹签字笔描清楚。

要求字体工整,笔迹清晰。

严格按题号所示的答题区域作答,超出答题区域书写的答案无效:在试卷、草稿纸上答题无效。

5.保持答题卡清洁、完整,严禁折叠、损坏。

严禁在答题卡上做任何标记,严禁使用涂改液、胶带纸、修正带。

考试结束后,将本试卷和答题卡一并交回。

一、选择题:(本大题10个小题,每小题4分,共40分)在每个小题的下面,都给出了代号为A,B,C,D的四个答案,其中只有一个是正确的,请将答题卡上题号右侧正确答案所对应的方框涂黑.1.(4分)4的相反数是()A.B.C.﹣4D.42.(4分)四个大小相同的正方体搭成的几何体如图所示,从正面看到的视图是()A.B.C.D.3.(4分)如图,直线a,b被直线c所截,若a∥b,∠1=63°,则∠2的度数为()A.27°B.53°C.63°D.117°4.(4分)如图,已知△ABC∽△EDC,AC:EC=2:3,若AB的长度为6,则DE的长度为()A.4B.9C.12D.13.55.(4分)反比例函数y=的图象一定经过的点是()A.(﹣3,2)B.(2,﹣3)C.(﹣2,﹣4)D.(2,3)6.(4分)用圆圈按如图所示的规律拼图案,其中第①个图案中有2个圆圈,第②个图案中有5个圆圈,第③个图案中有8个圆圈,第④个图案中有11个圆圈,…,按此规律排列下去,则第⑦个图案中圆圈的个数为()A.14B.20C.23D.267.(4分)估计×(﹣)的值应在()A.4和5之间B.5和6之间C.6和7之间D.7和8之间8.(4分)如图,AB为⊙O的直径,直线CD与⊙O相切于点C,连接AC,若∠ACD=50°,则∠BAC的度数为()A.30°B.40°C.50°D.60°9.(4分)如图,在正方形ABCD中,O为对角线AC的中点,E为正方形内一点,连接BE,BE=BA,连接CE并延长,与∠ABE的平分线交于点F,连接OF,若AB=2,则OF的长度为()A.2B.C.1D.10.(4分)在多项式x﹣y﹣z﹣m﹣n(其中x>y>z>m>n)中,对相邻的两个字母间任意添加绝对值符号,添加绝对值符号后仍只有减法运算,然后进行去绝对值运算,称此为“绝对操作”.例如:x﹣y﹣|z﹣m|﹣n=x﹣y﹣z+m﹣n,|x﹣y|﹣z﹣|m﹣n|=x﹣y﹣z﹣m+n,….下列说法:①存在“绝对操作”,使其运算结果与原多项式相等;②不存在“绝对操作”,使其运算结果与原多项式之和为0;③所有的“绝对操作”共有7种不同运算结果.其中正确的个数是()A.0B.1C.2D.3二、填空题:(本大题8个小题,每小题4分,共32分)请将每小题的答案直接填在答题卡中对应的横线上.11.(4分)计算:|﹣5|+(2﹣)0=.12.(4分)有四张完全一样正面分别写有汉字“清”“风”“朗”“月”的卡片,将其背面朝上并洗匀,从中随机抽取一张,记下卡片正面上的汉字后放回,洗匀后再从中随机抽取一张,则抽取的两张卡片上的汉字相同的概率是.13.(4分)若七边形的内角中有一个角为100°,则其余六个内角之和为.14.(4分)如图,在△ABC 中,AB =AC ,AD 是BC 边的中线,若AB =5,BC =6,则AD 的长度为.15.(4分)为了加快数字化城市建设,某市计划新建一批智能充电桩,第一个月新建了301个充电桩,第三个月新建了500个充电桩,设该市新建智能充电桩个数的月平均增长率为x ,根据题意,请列出方程.16.(4分)如图,在矩形ABCD 中,AB =2,BC =4,E 为BC 的中点,连接AE .DE .以E 为圆心,EB 长为半径画弧,分别与AE ,DE 交于点M ,N .则图中阴影部分的面积为(结果保留π).17.(4分)若关于x 的不等式组的解集为x <﹣2,且关于y 的分式方程+=2的解为正数,则所有满足条件的整数a 的值之和为.18.(4分)对于一个四位自然数M ,若它的千位数字比个位数字多6,百位数字比十位数字多2,则称M 为“天真数”.如:四位数7311,∵7﹣1=6,3﹣1=2,∴7311是“天真数”;四位数8421,∵8﹣1≠6,∴8421不是“天真数”,则最小的“天真数”为;一个“天真数”M 的千位数字为a ,百位数字为b ,十位数字为c ,个位数字为d ,记P (M )=3(a +b )+c +d ,Q (M )=a ﹣5,若能被10整除,则满足条件的M 的最大值为.三、解答题:(本大题8个小题,第19题8分,其余每题各10分,共78分)解答时每小题必须给出必要的演算过程或推理步骤,画出必要的图形(包括辅助线),请将解答过程书写在答题卡中对应的位置上.19.(8分)计算:(1)2)3()6(-++x x x x ;(2)mn m m n 229)3(-÷+.20.(10分)在学习了平行四边形的相关知识后,小虹进行了拓展性研究,她发现,如果作平行四边形一条对角线的垂直平分线,那么这条垂直平分线在该四边形内部的线段被这条对角线平分.其解决问题的思路为通过证明对应线段所在两个三角形全等即可得出结论.请根据她的思路完成以下作图和填空:用直尺和圆规作平行四边形ABCD对角线AC的垂直平分线,交DC于点E,交AB于点F,垂足为O.(只保留作图痕迹)如图,四边形ABCD是平行四边形,AC是对角线,EF垂直平分AC,垂足为O.求证:EO=FO.证明:∵四边形ABCD是平行四边形∴DC∥AB.∴∠ECO=.∵EF垂直平分AC,∴.又∠EOC=,∴△COE≌△AOF(ASA).∴EO=FO.再进一步研究发现,过平行四边形对角线中点的所有与该四边形一组对边相交所得的线段均具备此特征,请你依照题目中的相关表述完成下面命题的填空:过平行四边形对角线中点的直线.21.(10分)某洗车公司安装了A,B两款自动洗车设备,工作人员从消费者对A、B两款设备的满意度评分中各随机抽取20份,并对数据进行整理、描述和分析(评分分数用x 表示,分为四个等级:不满意x<70,比较满意70≤x<80,满意80≤x<90,非常满意x≥90),下面给出了部分信息:抽取的对A款设备的评分数据中“满意”包含的所有数据:83,85,85,87,87,89;抽取的对B款设备的评分数据:68,69,76,78,81,84,85,86,87,87,87,89,95,97,98,98,98,98,99,100.抽取的对A,B款设备的评分统计表设备平均数中位数众数“非常满意”所占百分比A88m9645%B8887n40%根据以上信息,解答下列问题:(1)填空:a=,m=,n=;(2)5月份,有600名消费者对A款自动洗车设备进行评分,估计其中对A款自动洗车设备“比较满意”的人数;(3)根据以上数据,你认为哪一款自动洗车设备更受消费者欢迎?请说明理由(写出一条理由即可).22.(10分)如图,△ABC是边长为4的等边三角形,动点E,F均以每秒1个单位长度的速度同时从点A出发,E沿折线A→B→C方向运动,F沿折线A→C→B方向运动,当两点相遇时停止运动.设运动的时间为t秒,点E,F的距离为y.(1)请直接写出y关于t的函数关系式并注明自变量t的取值范围;(2)在给定的平面直角坐标系中,画出这个函数图象,并写出该函数的一条性质;(3)结合函数图象,直接写出点E,F相距3个单位长度时t的值.23.(10分)某粮食生产基地为了落实在适宜地区开展双季稻中间季节再种一季油菜的号召,积极扩大粮食生产规模,计划用基地的甲、乙两区农田进行油菜试种,甲区的农田比乙区的农田多10000亩,甲区农田的80%和乙区全部农田均适宜试种,且两区适宜试种农田的面积刚好相同.(1)求甲、乙两区各有农田多少亩?(2)在甲、乙两区适宜试种的农田全部种上油菜后,为加强油菜的虫害治理,基地派出一批性能相同的无人机,对试种农田喷洒除虫药,由于两区地势差别,派往乙区的无人机架次是甲区的1.2倍(每架次无人机喷洒时间相同),喷洒任务完成后,发现派往甲区的每架次无人机比乙区的平均多喷洒亩,求派往甲区每架次无人机平均喷洒多少亩?24.(10分)人工海产养殖合作社安排甲、乙两组人员分别前往海面A,B养殖场捕捞海产品.经测量,A在灯塔C的南偏西60°方向,B在灯塔C的南偏东45°方向,且在A的正东方向,AC=3600米.(1)求B养殖场与灯塔C的距离(结果精确到个位);(2)甲组完成捕捞后,乙组还未完成捕捞,甲组决定前往B处协助捕捞,若甲组航行的平均速度为600米每分钟,请计算说明甲组能否在9分钟内到达B处?(参考数据:≈1.414,≈1.732)2)25.(10分)如图,在平面直角坐标系中,抛物线y=x2+bx+c与x轴交于点A,B,与y 轴交于点C,其中B(3,0),C(0,﹣3).(1)求该抛物线的表达式;(2)点P是直线AC下方抛物线上一动点,过点P作PD⊥AC于点D,求PD的最大值及此时点P的坐标;(3)在(2)的条件下,将该抛物线向右平移5个单位,点E为点P的对应点,平移后的抛物线与y轴交于点F,Q为平移后的抛物线的对称轴上任意一点.写出所有使得以QF为腰的△QEF是等腰三角形的点Q的坐标,并把求其中一个点Q的坐标的过程写出来.26.(10分)如图,在等边△ABC中,AD⊥BC于点D,E为线段AD上一动点(不与A,D 重合),连接BE,CE,将CE绕点C顺时针旋转60°得到线段CF,连接AF.(1)如图1,求证:∠CBE=∠CAF;(2)如图2,连接BF交AC于点G,连接DG,EF,EF与DG所在直线交于点H,求证:EH=FH;(3)如图3,连接BF交AC于点G,连接DG,EG,将△AEG沿AG所在直线翻折至△ABC所在平面内,得到△APG,将△DEG沿DG所在直线翻折至△ABC所在平面内,得到△DQG,连接PQ,QF.若AB=4,直接写出PQ+QF的最小值.2023年重庆市中考数学试卷(B卷)参考答案与试题解析一、选择题:(本大题10个小题,每小题4分,共40分)在每个小题的下面,都给出了代号为A,B,C,D的四个答案,其中只有一个是正确的,请将答题卡上题号右侧正确答案所对应的方框涂黑.1.(4分)4的相反数是()A.B.C.﹣4D.4【分析】只有符号不同的两个数叫做互为相反数,由此即可得到答案.【解答】解:4的相反数是﹣4.故选:C.【点评】本题考查相反数,关键是掌握相反数的定义.2.(4分)四个大小相同的正方体搭成的几何体如图所示,从正面看到的视图是()A.B.C.D.【分析】根据从正面看得到的图形是主视图,可得答案.【解答】解:从正面看,可得选项A的图形.故选:A.【点评】本题考查了简单组合体的三视图.解题的关键是理解简单组合体的三视图的定义,明确从正面看得到的图形是主视图.3.(4分)如图,直线a,b被直线c所截,若a∥b,∠1=63°,则∠2的度数为()A.27°B.53°C.63°D.117°【分析】根据平行线的性质可以得到∠1=∠2,然后根据∠1的度数,即可得到∠2的度数.【解答】解:∵a∥b,∴∠1=∠2,∵∠1=63°,∴∠2=63°,故选:C.【点评】本题考查平行线的性质,解答本题的关键是明确题意,利用平行线的性质解答.4.(4分)如图,已知△ABC∽△EDC,AC:EC=2:3,若AB的长度为6,则DE的长度为()A.4B.9C.12D.13.5【分析】根据相似三角形的性质联立方程即可求解.【解答】解:∵△ABC∽△EDC,AC:EC=2:3.∴,∴当AB=6时,DE=9.故选:B.【点评】本题主要考查了相似三角形的性质,找到对应的边成比例是解题的关键.5.(4分)反比例函数y=的图象一定经过的点是()A.(﹣3,2)B.(2,﹣3)C.(﹣2,﹣4)D.(2,3)【分析】根据k=xy对各选项进行逐一判断即可.【解答】解:反比例函数y=中k=6,A、∵(﹣3)×2=﹣6≠6,∴此点不在函数图象上,故本选项不合题意;B、∵2×(﹣3)=﹣6≠6,∴此点不在函数图象上,故本选项不合题意;C、∵﹣2×(﹣4)=8≠6,∴此点不在函数图象上,故本选项不合题意;D、∵2×3=6,∴此点在函数图象上,故本选项符合题意.故选:D.【点评】本题考查的是反比例函数图象上点的坐标特点,熟知反比例函数中k=xy为定值是解答此题的关键.6.(4分)用圆圈按如图所示的规律拼图案,其中第①个图案中有2个圆圈,第②个图案中有5个圆圈,第③个图案中有8个圆圈,第④个图案中有11个圆圈,…,按此规律排列下去,则第⑦个图案中圆圈的个数为()A.14B.20C.23D.26【分析】根据前4个图中的个数找到规律,再求解.【解答】解:第①个图案中有2个圆圈,第②个图案中有2+3×1=5个圆圈,第③个图案中有2+3×2=8个圆圈,第④个图案中有2+3×3=11个圆圈,...,则第⑦个图案中圆圈的个数为:2+3×6=20,故选:B.【点评】本题考查了规律型﹣图形的变化类,找到变换规律是解题的关键.7.(4分)估计×(﹣)的值应在()A.4和5之间B.5和6之间C.6和7之间D.7和8之间【分析】先化简题干中的式子得到﹣1,明确的范围,利用不等式的性质求出﹣1的范围得出答案.【解答】解:原式=﹣1.∵5<<6.∴4<﹣1<5.故选:A.【点评】本题以计算选择为背景考查了无理数的估算,考核了学生对式子的化简和比较大小的能力,解题关键是将式子化简,确定无理数的范围最后利用不等式的性质.8.(4分)如图,AB为⊙O的直径,直线CD与⊙O相切于点C,连接AC,若∠ACD=50°,则∠BAC的度数为()A.30°B.40°C.50°D.60°【分析】连接OC,根据切线的性质得到∠OCD=90°,求得∠ACO=40°,根据等腰三角形的性质得到∠A=∠ACO=40°.【解答】解:连接OC,∵直线CD与⊙O相切于点C,∴∠OCD=90°,∵∠ACD=50°,∴∠ACO=90°﹣50°=40°,∵OC=OA,∴∠BAC=∠ACO=40°,故选:B.【点评】本题考查了切线的性质,正确地作出辅助线是解题的关键.9.(4分)如图,在正方形ABCD中,O为对角线AC的中点,E为正方形内一点,连接BE,BE=BA,连接CE并延长,与∠ABE的平分线交于点F,连接OF,若AB=2,则OF的长度为()A.2B.C.1D.【分析】连接AF,根据正方形ABCD得到AB=BC=BE,∠ABC=90°,根据角平分线的性质和等腰三角形的性质,求得∠BFE=45°,再证明△ABF≌△EBF,求得∠AFC=90°,最后根据直角三角形斜边上的中线等于斜边的一半,即可求出OF的长度.【解答】解:如图,连接AF,∵四边形ABCD是正方形,∴AB=BE=BC,∠ABC=90°,AC=AB=2,∴∠BEC=∠BCE,∴∠EBC=180°﹣2∠BEC,∴∠ABE=∠ABC﹣∠EBC=2∠BEC﹣90°,∵BF平分∠ABE,∴∠ABF=∠EBF=∠ABE=∠BEC﹣45°,∴∠BFE=∠BEC﹣∠EBF=45°,在△BAF与△BEF中,,∴△BAF≌△BEF(SAS),∴∠BFE=∠BFA=45°,∴∠AFC=∠BAF+∠BFE=90°,∵O为对角线AC的中点,∴OF=AC=,故选:D.【点评】本题考查了等腰三角形的判定和性质,三角形内角和定理,正方形的性质,直角三角形特征,作出正确的辅助线,求得∠BFE=45°是解题的关键.10.(4分)在多项式x﹣y﹣z﹣m﹣n(其中x>y>z>m>n)中,对相邻的两个字母间任意添加绝对值符号,添加绝对值符号后仍只有减法运算,然后进行去绝对值运算,称此为“绝对操作”.例如:x﹣y﹣|z﹣m|﹣n=x﹣y﹣z+m﹣n,|x﹣y|﹣z﹣|m﹣n|=x﹣y﹣z﹣m+n,….下列说法:①存在“绝对操作”,使其运算结果与原多项式相等;②不存在“绝对操作”,使其运算结果与原多项式之和为0;③所有的“绝对操作”共有7种不同运算结果.其中正确的个数是()A.0B.1C.2D.3【分析】根据给定的定义,举出符合条件的说法①和②.说法③需要对绝对操作分析添加一个和两个绝对值的情况,并将结果进行比较排除相等的结果,汇总得出答案.【解答】解:|x﹣y|﹣z﹣m﹣n=x﹣y﹣z﹣m﹣n,故说法①正确.若使其运算结果与原多项式之和为0,需出现﹣x,显然无论怎么添加绝对值,都无法使x的符号为负号,故说法②正确.当添加一个绝对值时,共有4种情况,分别是|x﹣y|﹣z﹣m﹣n=x﹣y﹣z﹣m﹣n;x﹣|y ﹣z|﹣m﹣n=x﹣y+z﹣m﹣n;x﹣y﹣|z﹣m|﹣n=x﹣y﹣z+m﹣n;x﹣y﹣z﹣|m﹣n|=x﹣y ﹣z﹣m+n.当添加两个绝对值时,共有3种情况,分别是|x﹣y|﹣|z﹣m|﹣n=x﹣y﹣z+m ﹣n;|x﹣y|﹣z﹣|m﹣n|=x﹣y﹣z﹣m+n;x﹣|y﹣z|﹣|m﹣n|=x﹣y+z﹣m+n.共有7种情况;有两对运算结果相同,故共有5种不同运算结果,故说法③不符合题意.故选:C.【点评】本题考查新定义题型,根据多给的定义,举出符合条件的代数式进行情况讨论;需要注意去绝对值时的符号,和所有结果可能的比较.主要考查绝对值计算和分类讨论思想的应用.二、填空题:(本大题8个小题,每小题4分,共32分)请将每小题的答案直接填在答题卡中对应的横线上.11.(4分)计算:|﹣5|+(2﹣)0=6.【分析】由|﹣5|=5,(2﹣)0=1【解答】解:|﹣5|+(2﹣)0=5+1=6.故答案为:6.【点评】本题考查实数的运算.解题的关键是去绝对值注意符号;掌握任意非零实数的零次幂都等于1.12.(4分)有四张完全一样正面分别写有汉字“清”“风”“朗”“月”的卡片,将其背面朝上并洗匀,从中随机抽取一张,记下卡片正面上的汉字后放回,洗匀后再从中随机抽取一张,则抽取的两张卡片上的汉字相同的概率是.【分析】根据题意,可以画出相应的树状图,然后即可求出相应的概率.【解答】解:树状图如图所示,由上可得,一共有16种等可能性,其中抽取的两张卡片上的汉字相同的有4种可能性,∴抽取的两张卡片上的汉字相同的概率为=,故答案为:.【点评】本题考查列表法与树状图法,解答本题的关键是明确题意,画出相应的树状图,求出相应的概率.13.(4分)若七边形的内角中有一个角为100°,则其余六个内角之和为800°.【分析】利用多边形内角和公式求得七边形的内角和后与100°作差即可.【解答】解:由题意可得七边形的内角和为:(7﹣2)×180°=900°,∵该七边形的一个内角为100°,∴其余六个内角之和为900°﹣100°=800°,故答案为:800°.【点评】本题主要考查多边形的内角和,此为基础且重要知识点,必须熟练掌握.14.(4分)如图,在△ABC中,AB=AC,AD是BC边的中线,若AB=5,BC=6,则AD的长度为4.【分析】根据等腰三角形的性质可得AD⊥BC,在Rt△ABD中,根据勾股定理即可求出AD的长.【解答】解:∵AB=AC,AD是BC边的中线,∴AD⊥BC,∴∠ADB=90°,∵AB=5,BC=6,∴BD=CD=3,在Rt△ABD中,根据勾股定理,得AD===4,故答案为:4.【点评】本题考查了等腰三角形的性质,涉及勾股定理,熟练掌握等腰三角形的性质是解题的关键.15.(4分)为了加快数字化城市建设,某市计划新建一批智能充电桩,第一个月新建了301个充电桩,第三个月新建了500个充电桩,设该市新建智能充电桩个数的月平均增长率为x,根据题意,请列出方程301(1+x)2=500.【分析】设该市新建智能充电桩个数的月平均增长率为x,根据第一个月新建了301个充电桩,第三个月新建了500个充电桩,即可得出关于x的一元二次方程.【解答】解:设该市新建智能充电桩个数的月平均增长率为x,依题意得:301(1+x)2=500.故答案为:301(1+x)2=500.【点评】本题考查了由实际问题抽象出一元二次方程,找准等量关系,正确列出一元二次方程是解题的关键.15.(4分)如图,在矩形ABCD中,AB=2,BC=4,E为BC的中点,连接AE.DE.以E为圆心,EB长为半径画弧,分别与AE,DE交于点M,N.则图中阴影部分的面积为4﹣π(结果保留π).【分析】用三角形ADE的面积减去2个扇形的面积即可.【解答】解:∵AD=2AB=4,E为BC的中点,∴AB=2,BE=CE=2,∴∠BAE=∠AEB=∠CDE=∠DEC=45°,∴阴影部分的面积为﹣2×=4﹣π.故答案为:4﹣π.【点评】此题主要考查了扇形面积求法以及等腰直角三角形的性质,应用扇形面积的计算方法进行求解是解决本题的关键.17.(4分)若关于x的不等式组的解集为x<﹣2,且关于y的分式方程+=2的解为正数,则所有满足条件的整数a的值之和为13.【分析】先通过不等式组的解确定a的范围,再根据分式方程的解求a值即可得出答案.【解答】解:解不等式组,得:,∵原不等式组的解集为:x<﹣2,∴﹣≥﹣2,∴a≤5,解分式方程+=2,得y=,∵y>0且y≠1,∴>0且≠1,∴a>﹣2且a≠1,∴﹣2<a≤5,且a≠1,∴符合条件的整数a有:﹣1,0,2,3,4,5,∴﹣1+0+2+3+4+5=13.故答案为:13.【点评】本题主要考查解一元一次不等式组、解分式方程,熟练掌握一元一次不等式组、分式方程的解法是解决本题的关键.18.(4分)对于一个四位自然数M,若它的千位数字比个位数字多6,百位数字比十位数字多2,则称M为“天真数”.如:四位数7311,∵7﹣1=6,3﹣1=2,∴7311是“天真数”;四位数8421,∵8﹣1≠6,∴8421不是“天真数”,则最小的“天真数”为6200;一个“天真数”M的千位数字为a,百位数字为b,十位数字为c,个位数字为d,记P(M)=3(a+b)+c+d,Q(M)=a﹣5,若能被10整除,则满足条件的M的最大值为9313.【分析】它的千位数字比个位数字多6,百位数字比十位数字多2,则称M为“天真数”.分为两部分:第一部分千位数和个位数之间的关系,第二部分百位数和十位数之前的关系.【解答】解:求最小的“天真数”,首先知道最小的自然数的0.先看它的千位数字比个位数字多6,个位数为最小的自然数0时,千位数为6;百位数字比十位数字多2,十位数为最小的的自然数0时,百位数是2;则最小的“天真数”为6200.故答案为:6200.一个“天真数”M的千位数字为a,百位数字为b,十位数字为c,个位数字为d.由“天真数”的定义得a=d+6,所以6≤a≤9,b=c+2,所以0≤c≤7,又P(M)=3(a+b)+c+d=3(a+c+2)+c+a﹣6=4a+4c;Q(M)=a﹣5.=论能被10整除当a取最大值9时,即当a=9时,满足能被10整除,则c=1,“天真数”M为9313.故答案为:9313.【点评】新定义题型,各数字的取值范围,最值:最小自然数0.三、解答题:(本大题8个小题,第19题8分,其余每题各10分,共78分)解答时每小题必须给出必要的演算过程或推理步骤,画出必要的图形(包括辅助线),请将解答过程书写在答题卡中对应的位置上.19.(8分)计算:(1)x(x+6)+(x﹣3)2;(2)(3+)÷.【分析】(1)按照单项式乘以多项式的法则以及完全平方公式进行计算即可;(2)按照分式的混合运算法则进行计算即可.【解答】解:(1)x(x+6)+(x﹣3)2=x2+6x+x2﹣6x+9=2x2+9;(2)===.【点评】本题考查了分式的混合运算和整式的混合运算,熟练掌握混合运算法则是解题的关键,计算时一定要细心.20.(10分)在学习了平行四边形的相关知识后,小虹进行了拓展性研究,她发现,如果作平行四边形一条对角线的垂直平分线,那么这条垂直平分线在该四边形内部的线段被这条对角线平分.其解决问题的思路为通过证明对应线段所在两个三角形全等即可得出结论.请根据她的思路完成以下作图和填空:用直尺和圆规作平行四边形ABCD对角线AC的垂直平分线,交DC于点E,交AB于点F,垂足为O.(只保留作图痕迹)如图,四边形ABCD是平行四边形,AC是对角线,EF垂直平分AC,垂足为O.求证:EO=FO.证明:∵四边形ABCD是平行四边形∴DC∥AB.∴∠ECO=∠FAO.∵EF垂直平分AC,∴OA=OC.又∠EOC=∠FOA,∴△COE≌△AOF(ASA).∴EO=FO.再进一步研究发现,过平行四边形对角线中点的所有与该四边形一组对边相交所得的线段均具备此特征,请你依照题目中的相关表述完成下面命题的填空:过平行四边形对角线中点的直线被平行四边形一组对边所截,截得的线段被对角线中点平分.【分析】根据要求画出图形,证明△COE≌△AOF(ASA),可得结论.【解答】解:图形如图所示:理由:∵四边形ABCD是平行四边形,∴DC∥AB.∴∠ECO=∠FAO,∵EF垂直平分AC,∴AO=OC.又∠EOC=∠FOA,∴△COE≌△AOF(ASA).∴EO=FO.再进一步研究发现,过平行四边形对角线中点的所有与该四边形一组对边相交所得的线段均具备此特征,所以过平行四边形对角线中点的直线被平行四边形一组对边所截,截得的线段被对角线中点平分,故答案为:∠FAO,OA=OC,∠FOA,过平行四边形对角线中点的直线被平行四边形一组对边所截,截得的线段被对角线中点平分.【点评】本题考查命题与定理,平行四边形的性质,全等三角形的判定和性质等知识,解题的关键是理解题意,正确寻找全等三角形解决问题.21.(10分)某洗车公司安装了A,B两款自动洗车设备,工作人员从消费者对A、B两款设备的满意度评分中各随机抽取20份,并对数据进行整理、描述和分析(评分分数用x 表示,分为四个等级:不满意x<70,比较满意70≤x<80,满意80≤x<90,非常满意x≥90),下面给出了部分信息:抽取的对A款设备的评分数据中“满意”包含的所有数据:83,85,85,87,87,89;抽取的对B款设备的评分数据:68,69,76,78,81,84,85,86,87,87,87,89,95,97,98,98,98,98,99,100.抽取的对A,B款设备的评分统计表设备平均数中位数众数“非常满意”所占百分比A88m9645%B8887n40%根据以上信息,解答下列问题:(1)填空:a=15,m=88,n=98;(2)5月份,有600名消费者对A款自动洗车设备进行评分,估计其中对A款自动洗车设备“比较满意”的人数;(3)根据以上数据,你认为哪一款自动洗车设备更受消费者欢迎?请说明理由(写出一条理由即可).【分析】(1)用“1”分别减去其他三个等级所占百分比可得a的值,根据中位数的定义可得m的值,根据众数的定义可得n的值;(2)用600乘A款自动洗车设备“比较满意”所占百分比即可;(3)通过比较A,B款设备的评分统计表的数据解答即可.【解答】解:(1)由题意得,a%=1﹣10%﹣45%﹣=15%,即a=15;把A款设备的评分数据从小到大排列,排在中间的两个数是87,89,故中位数m==88;在B款设备的评分数据中,98出现的次数最多,故众数n=98.故答案为:15;88;98;(2)600×15%=90(名),答:估计其中对A款自动洗车设备“比较满意”的人数大约为90名;(3)A款自动洗车设备更受消费者欢迎,理由如下:因为两款自动洗车设备的评分数据的平均数相同,但A款自动洗车设备的评分数据的中位数比B款高,所以A款自动洗车设备更受消费者欢迎(答案不唯一).【点评】本题考查扇形统计图,中位数、众数以及样本估计总体,理解中位数、众数的意义,掌握中位数、众数的计算方法是解决问题的前提.22.(10分)如图,△ABC是边长为4的等边三角形,动点E,F均以每秒1个单位长度的速度同时从点A出发,E沿折线A→B→C方向运动,F沿折线A→C→B方向运动,当两点相遇时停止运动.设运动的时间为t秒,点E,F的距离为y.(1)请直接写出y关于t的函数关系式并注明自变量t的取值范围;(2)在给定的平面直角坐标系中,画出这个函数图象,并写出该函数的一条性质;。

Unit 8 Pets(B卷·提升能力)(牛津译林版)(解析版)七年级英语下册

Unit 8 Pets(B卷·提升能力)(牛津译林版)(解析版)七年级英语下册

班级姓名学号分数Unit 8 Pets(B卷·提升能力)(时间:100分钟,满分:100分)第一部分选择题一、单项选择(本大题共15小题,每小题1分,共15分)1.(精选·浙江·七年级单元测试)—What else do you need?—_________else. I get everything ready now.A.Everything B.SomethingC.Anything D.Nothing2.—How should I teach my dog to do any tricks?—Well, you should be_________ first, or(否则) he will run away.A.rude B.gentle C.shy D.sad 3.—Would you please_________ the number? I wasn't listening.—OK. That’s 152﹣3517﹣1386.A.remember B.report C.repeat D.reply 4.(精选·江苏·七年级单元测试)My cat likes to_________ under the bed. He doesn’t want anyone to find him.A.hold B.catch C.carry D.hide 5.The baby girl_________4.5 kg at birth so people call her Jiujin girl.A.weigh B.weight C.weighs D.weights 6.—Do fish sleep? I think they’re swimming around_________.—Of course they sleep. But they sleep with their eyes open.A.all the same B.at the same timeC.at that time D.all the time7.(精选·江苏·七年级期末)—Mum, look at the sign. Does it mean “Don't turn left”?—Yes, that’s_________.A.she B.me C.it D.those 8.Ann doesn’t know what to feed her cat. What key words can she search for information? A.Cat food.B.Cats’ friends.C.Tricks for cats.D.Cats and fish.9._________the bird is singing!A.How beautiful B.How beautifullyC.What beautiful D.What beautifully10.(精选·河南·七年级单元测试)He’s very_______ .He often plays tricks_______ others.A.fun; to B.fun; onC.funny; with D.funny; on11.Mum won’t let me play football_________ I do my homework well.A.or B.and C.for D.till12.It’s not good for your eyes to read_________ the sun.A.under B.with C.below D.in13.I saw a boy_________ football when I walked past the hall.A.playing B.play C.to play D.plays 14.Bruce and his father are talking_________ the telephone.A.on B.with C.from D.in15.(精选·安徽·七年级单元测试)—Which T-shirt do you like best?—The red one. It feels more_________.A.expensive B.beautiful C.comfortable D.popular二、完型填空(本大题共10小题,每小题1分,共10分)(精选·山东·乳山市教学研究中心七年级期末)An old man lived in a nice house with a large garden. He was busy taking care of his ___16___ in his garden all the time. One day, a young man passed by the garden. He looked at the beautiful flowers, imagining (想象) how happy he would be ___17___ he could live in such a beautiful place. Then he found out the old gardener was blind (失明). He was very ___18___. Then he asked the old man, “You can’t see these flowers, why are you busy taking care of them every day?”The old man smiled and said, “I have four reasons. First, I was a gardener when I was young and I really like this ___19___. Second, although I can’t see these flowers, I can touch (触摸) them. Third, I can ___20___ the sweetness of them. As for the last one, that’s you.”“Me? But you don’t know me,” said the young man.“Yeah, it’s ___21___ that I don’t know you. But I know that flowers can bring ___22___ happiness.”The blind old man’s work made other people happy, and it ___23___ made himself happy. It was just like Beethoven, one of the greatest ___24___ in history. Beethoven wrote a lot ofgreat music, but there was something wrong with his ears in his later life. Beethoven himself couldn’t ____25____ his wonderful music, but his music has encouraged millions of people to face their difficulties bravely.16.A.trees B.animals C.flowers17.A.if B.so C.but 18.A.relaxed B.excited C.surprised 19.A.boy B.job C.house 20.A.work B.help C.smell 21.A.important B.true C.wrong 22.A.everybody B.nobody C.anybody 23.A.still B.also C.only 24.A.musicians B.singers C.dancers 25.A.read B.see C.hear三、阅读单选(本大题共15小题,每小题2分,共30分)A(精选·广东·新丰县教育局教研室七年级期中)26.________ CAN’T see things very well.A.Bruce B.Peter C.Buzz D.Toby 27.Bruce is ________ years old.A.five B.seven C.nine D.eleven 28.We can know Buzz ________.A.sleeps during the day B.sleeps at nightC.drinks much water D.eats during the day29.The animals are from ________ different places.A.2B.3C.4D.5 30.Which of the following is TRUE?A.Bruce likes to eat meat and he is beautiful.B.Peter is clever and his favorite food is meat.C.Toby likes to eat bamboo but hates water.D.Buzz drinks little water because he can get water from the leaves.B(精选·广东·深圳市观澜中学七年级期中)Sometimes we must be careful with some animals such as dogs, because they might bite(咬)us. Pet dogs once bit Liu Yunkang, a farmer from Sichuan, three times. Not long ago, he got another new bite. But this time, it was different.“I was lucky that a panda bit me,” said the 60-year-old farmer. On Friday afternoon, a wild panda came down from the mountain. “It walked about 200 meters before crossing a river to reach the mountain on the other side,” said another farmer named Yang Guoxiang, who was the first one to see the panda while planting potatoes. Because the panda was dirty and couldn’t walk fast, the farmers thought it might be sick and decided to help it.The panda became afraid and it suddenly bit Liu’s left leg when the farmers were getting too close. Then it ran into the mountains.The panda’s two teeth made the bite and it wasn’t serious. But in fact, pandas are very strong when they get angry. They can even kill sheep. The farmers thought that the young panda’s mother drove it away to live by itself. It did not come down to look for food because there were many bamboo trees in the mountains.31.How many times did dogs bite Liu Yunkang?A.Once.B.Twice.C.Three times.D.Four times. 32.How did Liu Yunkang feel after the panda bit him?A.Weak.B.Interested.C.Lucky.D.Strange. 33.What was Yang Guoxiang doing when he saw the panda?A.Planting potatoes.B.Walking down the mountain. C.Planting trees.D.Talking with other farmers. 34.What does the underlined word “serious” in the fourth paragraph mean?A.重要的B.大的C.错误的D.严重的35.What can we know from the passage?A.Pandas sometimes are dangerous.B.Nearly all animals might bite people at times.C.Wild pandas like to look for food alone.D.Young wild pandas are used to(习惯于)living with their mothers.C(精选·山东济南·七年级期中)Welcome to the Fun World. We all know that pets are kids’ good friends. Follow me to know more about them.Jim’s pets Dolly and Dora are kind of small but very cute. They love running around in the cage. Sometimes, they fight like children. Look! They’re running happily there. Do you know that they often put food in their cheeks (脸颊)? Their cheeks are like two big food bags. They usually put breakfast, lunch and dinner into their mouths all together.Jenny’s pet is not big, but it looks really beautiful. It’s difficult for her to fall asleep at night because her pet loves singing, talking and flying. What can Jenny do? Light tells when it is time to wake up. So turn off(关上) the light and then it will go to sleep. Do you think it’s a helpful way?Steve’s pet looks cute and friendly. It’s white with two red eyes. It is very good at running. But do you know it has a super nose? So it can twitch(抽动) its nose to catch every smell.Thanks for your listening! See you tomorrow!36.How many pets does Jim have?A.one B.two C.three D.four 37.What doesn’t Jenny’s pet like?A.singing B.running C.flying D.talking 38.What does Steve’s pet look like?A.It’s black with two red eyes.B.It’s white with a red nose.C.It’s white with two red eyes.D.It’s red with black eyes.39.Which is not TRUE?A.Jim’s pets often fight. B.Jenny has a good way to make her pet go to sleep. C.Jenny’s pet is not big. D.Steve’s pet has a super nose.40.The passage is mainly about ________.A.friends B.kids C.pets D.zoos第二部分非选择题四.根据提示写单词(本大题共10小题,每小题1分,共10分)41.When he gets tired, he never sleeps__________(somewhere)except on the sofa. 42.The big elephant is about three tons in__________( weigh).43.A lot of__________( mouse) lived in this old house in the past.44.My dog__________( fight) with other dogs yesterday.45.Does your father agree__________( pay) for your new bike?用不定代词填空46.The machine doesn't work. I'm sure there is __________ wrong with it.47.I can hear __________ singing and dancing upstairs (在楼上). Who can it be? 48.Just call me if you need __________.49.There is __________ to eat at home. Let's eat out this evening.50.Hello, __________. I have something important to tell you.五、短文首字母填空(本大题共10小题,每小题1分,共10分)(精选·江苏南京·七年级期末)根据短文内容及首字母提示, 填写所缺单词, 并将答案填写在答题卡号为1-10的相应位置上, 每空一词.In Beijing, Guangzhou and Shanghai, lucky passengers (乘客) may find books somewhere on the underground. Although many people read online, books have not gone out of f___51___.The Fair, an online publishing company, has put 10,000 books on the underground, planes and taxis to make people more i___52___ in reading. This project is called “Mobook”.“Mobook” gets its i___53___ from “Books on the Underground”, a community project in London. The purpose of “Books on the Underground” is to encourage people to s___54___ more time on reading. Zhang Wei, the CEO of the Fair also wanted to do something in China. He sent an email to Ms Cordelia Oxley, the leader of “Books on the Underground”, telling his p___55___ and explaining the rules of “Mobook”. The leader replied to his email s___56___ saying that she thought the idea was great and she would offer help if needed.But “Mobook” project is a little d___57___ from that in London. It has its own online system. People who want to donate (捐赠) books must give their information online. QR code stickers (二维码标签) are then sent to their addresses. The book owners should stick (粘贴) them on the books b___58___ donating books and readers can know w___59___ the books are from with the help of QR codes.“Mobook” is a hot topic. Now t____60____ of bookworms have already taken part in the project. Zhang Wei said, “I am happy to see more and more people share their views (观点) about the books online and enjoy the happiness that reading brings to them.”六、阅读填表(本大题共10小题,每小题1分,共10分)(精选·江苏·扬州市广陵区教师发展中心七年级期末)阅读下面短文,根据短文中的信息完成文后表格,写出空缺处所填单词的正确形式。

《工商行政管理知识》分章节练习试卷B卷

《工商行政管理知识》分章节练习试卷B卷

2010年四川省工商系统公考加试专业科目《工商行政管理知识》分章节练习试卷B卷序这里的五本册子都是专门针对2010年四川省工商系统公开考试录用公务员加试专业科目《工商行政管理知识》编写的。

下面把它们的内容简单介绍一下:《〈工商行政管理知识读本〉精编》把官方用书《工商行政管理知识读本》的重点、难点、易考点摘录下来,并已经编排好,你可以直接打印使用。

毕竟官方用书有很多页、没圈重点,而且备考时间有限,所以,这本书值得拥有。

《分章节练习试卷A卷》、《分章节练习试卷B卷》(就是现在这本......)是按照考试大纲的章节设置模拟题。

看完一个章节的内容后做做相应的模拟题,无疑更容易巩固、提高。

《A卷》共有50页(A4纸大小,下同),470道题;《B卷》共有75页,710道题。

《巩固练习试卷集》那是一片题海。

虽然只有三份试卷,却有40多页,约370道题。

这些题目涵盖了几乎所有与工商行政管理相关的知识(包括考试大纲里没有的)。

做完并吃透这些题目,你将成为半个内行人。

《考前冲刺试卷集》精选了七套高质量试卷,包括往年公考工商加试科目真题、执法证考试真题、国家级竞赛用题等——题目都较严谨、全面、权威,用作考前模拟来找状态是最好不过的了。

唯一的遗憾是,好几套的题目都没达到100题,原因后面解释。

该册子有40多页,约450道题。

其他:1、编者系工商系统人士。

编这几本册子花了三个多月,流程是:向往年考生了解情况→分析《考试大纲》→向各地同行索要资料→依据《考试大纲》整理资料→逐题检验答案→校对→杀青。

2、研究发现,《考试大纲》原型应该是工商总局多年前出版的几本书的摘要。

所以,偶在编写过程中把一些过时的内容(如打击投机倒把)删掉;一些近些年出现的新内容(如食品安全),虽然《考试大纲》未提及,但因为是当前工商工作的重中之重,也保留下来——往年考生反映,并非只考《考试大纲》的。

3、总之,所奉送给大家的考题,都是尽量围绕大纲、紧靠工商行政管理工作的。

2024成都语文中考试题研究备考专题一 记叙文(含文学作品)阅读 散文 考点1 把握散文内容

2024成都语文中考试题研究备考专题一  记叙文(含文学作品)阅读 散文 考点1  把握散文内容

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2.请结合语境,将文章第⑨段空缺处补充完整,使之成为一个比喻句, 并对这个比喻句进行简要赏析。(4分)【句子的理解及赏析】
【答案】(4分)示例:风情万种的艺术体操。 赏析:艺术体操柔软舒展,与书信能传递舒展宽厚的情感一致;这个比 喻句生动地写出书信富有情韵的特点,传递出作者对书信的喜爱;与前 面凸显电话方便直白的比喻句形成对比。
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二、
(2023青羊区二诊)(成都地域)阅读下面的文章,
完成1~4题。(18分)
文章详见学生用书 • P11
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文章解构 第一部分(第①段):引出介绍的对象——成都的桤树。 第二部分(第②~⑤段):介绍桤树的特性和用途。 第三部分(第⑥~⑨段):有关桤树的文人典故和桤树与蜀人审美(价值) 的关联。 第四部分(第⑩⑪段):“我”对桤树的看法。
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4.(2019成都B卷11题)文章第十一段,提及哪些读诗的方法?你更赞同哪 一种?请以“大漠孤烟直,长河落日圆”为例,简要分析。 5.(2015成都B卷8题)第①段中说,成都和诗的关系“格外特别”。诗与 成都“格外特别”的关系是什么?请结合全文,简要回答。 6.(2015成都B卷9题)文章③~⑥段是从哪几个方面来写“成都是一座诗 城”的?请分点简要概括。(2014成都B卷8题设问同此)
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读文章,学写作 富有语言特色:文中引用“朱自清从蜀地进入云南”“北宋严有翼……” “当年杜甫在修建草堂的时候……”等名人事例、名言,既使文章表达 简洁生动,又为文章增添了文学气息。
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英语时代新课程配套试卷八下unit 8b卷

英语时代新课程配套试卷八下unit 8b卷

英语时代新课程配套试卷八下unit 8b卷【听力材料】:(Text 1)W: What’s new with you,Jack?M:Well,I met a really nice woman.We’ve been going out for three months and things look good now.(Text 2)M: When did you first find the door broken and things missing?W:After I got up,around 5:20.Then I called the police station.(Text 3)W: Pass me the flour,please.M:Which tin is it in?W:The one at the end of the shelf.It’s slightly smaller than the others.M:Oh,right.(Text 4)W:Do you know why George hasn’t come ye t?M:Yes.He was planning to come,but his wife’s father fell downsome stairs and they had to take him to a hospital.W:I’m sorry to hear that.(Text 5)W:Hi,Tony.How did your experiment go yesterday?M: Well,it wasn’t as easy as I had thought.I have to con tinue doing it tonight.(Text 6)M:Is that Ann?W:Yes.M:This is Mike.How are things with you?W:Oh,very well,but I’m very busy.M:Busy? But you’ve finished all your exams?W:Yes,but I have to help my little sister with her foreign language.M:How about coming out with me this evening?There’s a new film on.W:I’m afraid I can’t.A friend of mine is coming from the south and I have to go to the station to meet him.M:What a pity!How about the weekend then?W:No,I’ve arranged to go to an art exhi bition with my parents.M:What about next week sometime?W:Maybe.(Text 7)W:I hear there will be a football competition between all senior schools next month.Is that so?M:That’s true.W:Would you please go into some more details?M:Well,the competition will be held in our school and it will begin on August 11.The competition will last a whole week.W:Anything else?M:Yes,both the girls and boys competition will be held at the same time.The girls competition will be held in the morning and the boys competition will be held in the afternoon.W:Yes? Sounds exciting.M:We are both members of our school football team.We should be ready for it.W:Of course.It’s a long time since we had the last football competition last time.I’m really looking forward to anothercompetition.M:Me,too.(Text 8)W: Excuse me.I am from STM.We are carrying out a survey on the traffic in our city.Do you mind if I ask you some questions?M:No,not at all.Go ahead.W:Good,thanks.What do you do,sir?M:I am a teacher.I teach children French.W:Great.Do you live far from the school? I mean,how do you usually go to work?M:Well,mostly by car.But once in a while,I prefer to ride my bike.You know,I live quite far from the school,about 20 miles.And I have to spend about an hour riding to school.But it only takes me less than a quarter of an hour to drive my car,unless the traffic is very bad.W:I see.Does this happen often? I mean the bad traffic.M:Yes,sure! I often get stuck on the way,and the problem’s getting worse and worse.W:That’s all of my questions.Thank you very much.M:You are welcome.(Text 9)M: Customer service.Andney Grant speaking.How may I help you?W:I can’t believe this is happening.I called and ordered a 32?inch bag last Friday.But today I found that you sent me a 24?inch one.I was planning to use that bag during our vacation in Mexico,but it doesn’t seem possible any more because we will take off on Saturday.It’s only two days away.What am I supposed to do?M:I’m really sorry,madam. I’ll check right away.Would you please tell me your order number?W:It’s CE2938.M:Just a minute.I do apologize,madam.There did seem to be a mistake.I’ll have the corre ct size bag sent to you by overnight mail right away.It will arrive in time for your Saturday trip.Again I apologize for any inconvenience caused by our mistake.I promise it won’t happen again.W:OK.Well,thank you.M:Thank you,madam,for choosing Linch mail.I hope you willhave a wonderful vacation.(Text 10)I wasn’t too fond of the lecture classes of 400 students in my general course.Halfway through my second term when I was considering whether or not to come back in the fall,I went on the Internet and came across Americorp.Then I joined in an organization,and that’s what I did last school year.I worked on making roads,building a house,serving as a teacher’s assistant and working as a camp officer in several projects in South Carolina and Florida.It’s been a great experience,and I’ve almost learned more than what I could have in college since I didn’t really want to be at that school and wasn’t interested in my major anyway,I thought this was better for me.After 1,700 hours of service I received 4,750 dollars.I can use that to pay off the money I borrowed from the bank or for what is needed when I go back to school this fall at Columbus State in Ohio.Classes are smaller there and I’ll be majoring in German education.After working with the kids,now I know,I want to be a teacher.一、听力第一节(共5小题,每小题1分)听下面5段对话。

人教版七年级英语下册B卷 Unit 8(B卷 能力提升)-【单元测试】(原卷版)

人教版七年级英语下册B卷 Unit 8(B卷 能力提升)-【单元测试】(原卷版)

班级姓名学号分数Unit 8 Is there a post office near here?单元测试(B卷·能力提升)(时间:60分钟,满分:100分)一、单项选择(每小题1分,共15分)1.(2021·七年级单元测试)I will buy this pair of shoes. How much need I ________ you? A.cost B.bring C.spend D.pay 2.(2021·七年级期末)—I want to go out for dinner. Is there a ________ near here?—Yes, there is one next to the post office.A.bank B.library C.restaurant D.supermarket 3.(2022·七年级单元测试)—Is there a fruit shop near here?—Yes, it’s ________ Center Street ________ the right.A.on; on B.in; in C.on; in D.to; on 4.(2022·七年级期末)Look! There is a blackboard ________ our classroom and there is a tree ________ the building.A.in the front of; in the front of B.in front of; in front ofC.in front of; in the front of D.in the front of; in front of 5.(2022·七年级课时练习)The earth goes ________ the sun.A.around B.through C.between D.across 6.(2022·湖北黄石·统考中考真题)There _____ a volleyball game next Saturday. If it ______ we’ll have to put it off.A.is going to be; rains B.is going to be; will rainC.is going to have; will rain D.is going to have; rains7.(2021·七年级单元测试)________ a book in the library, enter a key word into the computer. A.To find B.Find C.To write D.Write 8.(2021·全国·八年级专题练习)Most students spend too much time _______ computer games.A.playing B.playC.plays D.played9.(2021·安徽阜阳·七年级)The work is not difficult. You can finish it ________.A.funny B.lucky C.easily D.differently 10.(2021·七年级课时练习)—Excuse me, how can I get to the bookstore?—Go ________ the bridge. You'll see it on your left.A.on B.cross C.across D.through11.(2022·七年级单元测试)There ________ a pencil and some pens in the box.A.is B.are C.aren’t D.am12.(2022秋·广东广州·七年级期中)We will have to ________ at least 4 hours ________ to Shanghai.A.spend; fly B.take; to fly C.spend; flying D.take; flying 13.(2022秋·江苏徐州·七年级期中)I don’t know the students in that club because I don’t go there very ________.A.often B.sometimes C.seldom D.never 14.(2023春·八年级课时练习)—Dinner is ready. Help yourself, please!—Wow! It ________ delicious. You are really good at cooking.A.gets B.sounds C.tastes D.turns 15.(2022·广西玉林·统考中考真题)— As far as I know, there _____ a high-speed train from Yulin to Shenzhen in 2023.— Yeah! It will be more convenient for the people in Yulin.A.will be B.has C.is D.will have二、完形填空(每小题1分,共10分)(2022春·湖北孝感·七年级统考期末)Hi, friends. There is a new ____16____ in my neighborhood. The food there is very delicious. My parents and I ____17____ having dinner there on the weekend. It only takes____18____ three or four minutes to walk there. After dinner we often take a walk in the____19____ across from the restaurant. And sometimes we ____20____. There is a big supermarket next to the park.The restaurant is also a great ____21____ to have big parties. I plan to have my 14th birthday party there next Friday. If you are ____22____, welcome to my party. You can find the restaurant ____23____. It’s on Zhongshan Road, ____24____ a bank and a hotel. Oh, I ____25____ to tell you the name of the restaurant. It’s Jinyang Restaurant.16.A.hotel B.bank C.hospital D.restaurant 17.A.spend B.enjoy C.wish D.follow 18.A.him B.them C.us D.her19.A.park B.library C.office D.store 20.A.play sports B.take a trip C.go swimming D.go shopping 21.A.time B.place C.country D.number 22.A.lazy B.short C.free D.funny 23.A.usually B.friendly C.early D.easily 24.A.between B.after C.under D.from 25.A.learn B.drive C.leave D.forget三、阅读单选(每小题2分,共40分)(一)(2022春·云南西双版纳·七年级校考期中)A.Take her keys to her mother.B.Look for her keys.C.Tell her the way to bank.D.Help her mother look for keys. 27.There are ________ streets in the passage(文章).A.four B.five C.six D.seven 28.Where will Linda’s mother wait for Mary?A.Next to the supermarket.B.In front of the garden.C.Behind the house.D.In the garden.29.From the passage, we know that ________.A.Linda doesn’t tell Mary the way to her houseB.Linda’s mother is in the bankC.Linda is not very busy with her workD.Linda tells Mary to turn left into Long Street30.What’s the main idea(主旨)of the passage?A.Linda tells Mary the way to her house to help her mother.B.Mary wants to visit Linda’s house.C.Mary knows the way to Linda’s house.D.Linda’s mother lives in Mary’s house.(二)(2021·四川巴中·九年级期中)Some people have a very poor sense(感觉)of direction. Unluckily, I am one of them. I have visited a place many times but I may still get lost there the next time.When I was a little girl, I never dared ask strangers the way. And so I used to walk round in circle and hope that by chance I would get to the place I was going to.Now, I am no longer too shy to ask people for directions, but I often receive helpless or even wrong information. So I try to avoid giving people wrong directions. If anyone asks me the way somewhere, I would say, “Sorry, I am a stranger here.”Once on my way to work I was stopped by a man. He asked me if I could tell him the way to the Friendship Building. I gave him my usual reply. But just as I walked on only a few steps, I realized that he had asked the way to my office building. However, I had no time to turn back and look for him. I was rushing to meet with someone at my office and I didn’t want to keep him waiting.When I just got to my office, the secretary showed in the man who had asked me for directions. Imagine how embarrassed I was and how surprised he was when we saw each other at the first sight!31.What does the underlined word mean in paragraph 2?A.有目的地B.碰巧C.错误地D.匆忙地32.Why would the writer say “Sorry, I am a stranger here.”, when someone asks her the way somewhere?A.Because the writer is afraid of giving people wrong directions.B.Because the writer doesn’t want to tell strangers.C.Because the writer has no time.D.Because the writer is a stranger here.33.The Friendship Building is the place where the writer ________.A.lives B.studies C.works D.teaches34.The underlined word “embarrassed” in the last paragraph means “________”.A.困惑的B.尴尬的C.激动的D.拮据的35.Which of the following is TRUE according to the passage?A.The writer is too shy to give others directions.B.The man was quite nervous when he saw the writer.C.The writer never got lost when she was young.D.The writer has a very poor sense of directions.(三)(2020·浙江温州·七年级开学考试)Do you often carry maps when you travel to other countries? Maps can show you the rightways. But if you don’t bring maps with you, what should you do? I’m afraid that you need to ask the way. Here are some tips(建议) for you, because there are different ways to give ways in the world.In Japan, most streets don’t have their street names. The Japanese use landmarks(路标) to give ways. So when you ask, “Excuse me, could you tell me how to get to the nearest post office?” They often say, “Go along the road, turn left on the second street and go past a supermarket. The post office is opposite the hospital.”In the countryside of the American midwest. The land is very flat(平坦的). So if you have the same question, people will say to you, “Go east 3 kilometers, turn north and then walk another kilometer.” But in Los Angeles and California, people measure distance(测量距离) by time, not meters. So when you ask, “How far is the nearest post office?”, they will tell you, “It’s about 10 minutes’ walk from here”.People in Greece often use body language to help you. They will use their hands to show the right or left ways, or they will simply say, “follow me.” Because they can’t speak English and the tourists couldn’t understand the language there.36.If you are in Japan, __________.A.the street name will help you find the way easilyB.the Japanese use landmarks to help you find the waysC.you need to use body language to ask the wayD.you can see some street names in Japanese37.Which part of America is flat?A.Northwest.B.Southwest.C.Northeast.D.Midwest. 38.How do the people in California show the way?A.They use the landmarks.B.They use body language.C.They measure distance by time.D.They usually say “follow me”. 39.What’s the Chinese meaning of the underlined words “body language”?A.指示路牌B.当地方言C.肢体语言D.翻译机器40.What’s the best title of the passage?A.Asking the way B.Different ways of giving wayC.Funny things in the world D.The important language—English(四)(2022·山东东营·中考真题)In modern times, we get our weather report scientifically. The meteorologists(气象学家) use information from satellites (卫星) to tell us what the weather will be like. They make predictions about the weather for today, tomorrow and even for the whole season. Will it rain? Will it snow? Will it be hot or will it be a long and cold winter?But what did people do before modern technology? Well, not so long ago, people lived muchcloser to nature. Using the power of observation (观察), humans made predictions about the weather according to what was happening in the insect world. Sometimes their predictions were correct, and sometimes they weren’t.My grandfather spent his whole life as a farmer in Canada. He is long gone now. But I still remember his stories about how to predict the weather. For example, in summer, he would often stop to observe the anthills — those little sandy mounds (沙堆) at the entrance (入口) to the ants’ nest.“Look closely at the anthills in July,” Grandpa used to say. “If the anthills are high in July, expect a snowy winter.” Of course, as a kid, I believed my grandfather. But you know what? The anthills are often correct. Not always, but often enough to make me a believer.In September, Grandpa would often point out a woolly caterpillar (毛毛虫) in a sunny location, “Observe the orange circle around its belly (腹部). If it’s wide and full, we’re sure to have a warm and easy winter. If it’s thin, be careful! The winter will be severe.”I am older now. I get my weather mostly from the television or radio. Scientists hardly get it wrong. After all, they have the latest scientific instruments to help them.But I still stop to observe the anthills in July, and of course, the woolly caterpillars in September. The older generation (老一辈) can teach us many things. My grandfather was not a meteorologist, but he knew a lot about insects and the weather.41.________ can help us predict the weather more correctly.A.Satellites B.Anthills C.Woolly caterpillars D.Televisions or radios42.According to Grandpa’s experience, if the anthills are high in July, maybe it will be________.A.a rainy winter B.a snowy winter C.a long and cold winter D.a warm and easy winter43.Which word can replace (替代) the underlined word “severe” ?A.hot B.warm C.cool D.cold44.In the last paragraph, the writer thinks _________.A.we should only listen to the meteorologistsB.his grandpa knew more than the meteorologistsC.we needn’t observe the insects to predict the weatherD.his grandpa’s ways to predict the weather are still helpful45.Which would be a good title for this passage?A.The power of observation B.Weather according to insects C.Weather report in modern times D.Different ways to make predictions四、阅读回答问题(每小题2分,共10分)(2022秋·湖南湘潭·七年级统考期末)阅读下面的材料,然后根据材料内容回答问题。

2023年陕西中考地理真题卷(B卷)(含答案与解析)

2023年陕西中考地理真题卷(B卷)(含答案与解析)

机密★启用前试卷类型:B2023年陕西省初中学业水平考试地理试卷注意事项:1.本试卷分为第一部分(选择题)和第二部分(非选择题)。

全卷共8页,总分60分。

考试时间60分钟。

2.领到试卷和答题卡后,请用0.5毫米黑色墨水签字笔,分别在试卷和答题卡上填写姓名和准考证号,同时用2B铅笔在答题卡上填涂对应的试卷类型信息点(A或B)。

3.请在答题卡上各题的指定区域内作答,否则作答无效。

4.考试结束,本试卷和答题卡一并交回。

第一部分(选择题共22分)一、选择题(本大题共22小题,每小题1分,共22分。

下列各小题的四个选项中,只有一项是最符合题目要求的)2023年3月21日,小明爸爸开车送他去足球运动公国参加比赛。

下图是他们使用的手机导航软件截图,读图完成下面小题。

1. 当小明在手机屏幕上进行放大操作时,地图()A. 显示范围将变大B. 显示范围不变C. 比例尺将变大D. 比例尺将变小2. 当车辆行驶到图中“”标识位置时,最有可能看到的交通指示牌是()A. B.C. D.3. 因为比赛,小明需要比平时晚回家,该日节气与昼夜长短状况是()A. 秋分昼短夜长B. 秋分昼夜等长C. 春分昼长夜短D. 春分昼夜等长天文观测的最佳地点一般选择在视野开阔、大气透明度高且靠近赤道的地方。

厄瓜多尔首都基多是世界顶级观星胜地之一。

读厄瓜多尔简图,完成下面小题。

4. 厄瓜多尔所在的大洲()A. 是非洲B. 在东半球C. 东临大西洋D. 南至白令海峡5. 以下天气符号所表示的天气,最适宜开展观星活动的是()A. B. C. D.6. 基多适宜观星的自然条件是()A. 位于中纬度地区,四季分明B. 海拔较高,能见度好C. 靠近板块交界处,火山活跃D. 高温多雨,河流众多20世纪80年代以来,我国在两极地区已建成五个极地科学考察站。

结合所学完成下面小题。

7. 图为黄河站所在的斯匹次卑尔根岛简图,其中黄河站()A. 距海洋较远B. 位于南极地区C. 有极昼极夜现象D. 位于该岛最高处8. 极地科考人员工作和居住的科考站最有可能是( )A. B.C D.9. 极地开展科学考察( )A. 可为气象、冰川等领域的科学研究提供帮助B. 与人类生存、国际关系和经济可持续发展无关C. 帮助人类了解地球的过去,对未来意义不大D. 可大量开发矿产资源,缓解地球能源危机读2010-2022年中国人口自然增长率变化折线图,完成下面小题。

2019年全国职业院校技能大赛高职组中药传统技能赛卷及评分标准+真伪试题-B卷-第一场-GB-8套试题答

2019年全国职业院校技能大赛高职组中药传统技能赛卷及评分标准+真伪试题-B卷-第一场-GB-8套试题答
3

温补肝肾,壮阳固精
5
鸦胆子
清热解毒,截疟,止痢;外用腐蚀赘疣
6
玄参
清热凉血,滋阴降火,解毒散结
7
赤芍
清热凉血,散瘀止痛
8
首乌藤
养血安神,祛风通络
9
厚朴
燥湿消痰,下气除满
10
茵陈
清利湿热,利胆退黄
11
芥子
温肺豁痰利气,散结通络止痛
12
鹤虱
杀虫消积
13
玫瑰花
行气解郁 和血 止痛
2019年全国职业院校技能大赛过程评分表(B卷)GB(第一场)
考试时间:(6月13日上午9:30~11:30)
工位号:组别:竞赛用时:成绩:________
赛区
山东
赛项名称
中药传统技能
模块
中药性状鉴别
中药识别
编号
饮片名称(1.5分)
主要功效(1.0分)
扣分
1
白头翁
清热解毒,凉血止痢
2
徐长卿
祛风,化湿,止痛,止痒
正品
伪品
扣分
1
黄柏

2
半夏

3
西红花

4
威灵仙

5
木香

6
槲寄生

7
龙胆

8
柴胡

9
石菖蒲

10
吴茱萸

扣分合计
中药真伪鉴别总分(满分50分)
计时员签名:
评分裁判员签名:
复核裁判员签名:日期:2019年月日
14
土鳖虫
破血逐瘀,续筋接骨
15
川贝母

成都初三B卷专题训练8

成都初三B卷专题训练8

成都初三B 卷专题训练8一、填空题1.设y=01172,1222=+---x x x 则方程变为_________。

2、若不等式组30x a x >⎧⎨-≤⎩只有三个整数解,求a 的取值范围3.如图,已知⊙O 的两条弦AB 、CD 相交于AB 的中点E,且AB=4,DE=CE+3,则CD 的长为 。

4.把边长为3的正三角形各边三等分,分别得到图①,图中含有1个边长是1的正六边形;把边长为4的正三角形各边四等分,分别得到图②,图中含有3个边长是1的正六边形;把边长为5的正三角形各边五等分,分别得到图③,图中含有6个边长是1的正六边形;……以此规律,把边长为7的正三角形各边七等分,并按同样的方法分割,得到的图形中含有_______个边长是1的正六边形.二、解答题 惊闻5月12日四川汶川发生强烈地震后,某地民政局迅速地组织了30吨食物和13吨衣物的救灾物资,准备于当晚用甲、乙两种型号的货车将它们快速地运往灾区.已知甲型货车每辆可装食物5吨和衣物1吨,乙型货车每辆可装食物3吨和衣物2吨,但由于时间仓促,只招募到9名长途驾驶员志愿者.(1) 3名驾驶员开甲种货车,6名驾驶员开乙种货车,这样能否将救灾物资一次性地运往灾区?(2)要使救灾物资一次性地运往灾区,共有哪几种运货方案?6.如图,已知:C 是以AB 为直径的半圆O 上一点,CH ⊥AB 于点H ,直线AC 与过B 点的切线相交于点D ,E 为CH 中点,连接AE 并延长交BD 于点F ,直线CF 交直线AB 于点G.(1)求证:点F 是BD 中点;(2)求证:CG 是⊙O 的切线;(3)若FB=FE=2,求⊙O 的半径.7、如图10,已知点A的坐标是(-1,0),点B的坐标是(9,0),以AB为直径作⊙O′,交y轴的负半轴于点C,连接AC、BC,过A、B、C三点作抛物线.(1)求抛物线的解析式;(2)点E是AC延长线上一点,∠BCE的平分线CD交⊙O′于点D,连结BD,求直线BD的解析式;(3)在(2)的条件下,抛物线上是否存在点P,使得∠PDB=∠CBD?如果存在,请求出点P的坐标;如果不存在,请说明理由.图10。

西师大版2020年小学语文趣味知识竞赛试卷(8)B卷

西师大版2020年小学语文趣味知识竞赛试卷(8)B卷

西师大版2020年小学语文趣味知识竞赛试卷(8)B卷姓名:________ 班级:________ 成绩:________小朋友,带上你一段时间的学习成果,一起来做个自我检测吧,相信你一定是最棒的!一、选择题 (共7题;共14分)1. (2分)“意思”在下列各句中和其它三句意义不一样的()A . 这个词的意思我懂了。

B . 你说的这句话是什么意思?C . 这本书可有意思了!D . 只有多读几遍,才能明白课文的意思。

2. (2分)《草船借箭》出自哪一部名著()。

A . 西游记B . 水浒传C . 红楼梦D . 三国演义3. (2分)依据文段内容,在横线上补全语句,使语言得体,最恰当的一项是()超市里,一位营业员发现有位顾客买青菜时,把菜叶剥掉了许多,于是,她走上前云,对他说:“同志,_______。

”A . 你这是干什么?不能再剥了B . 把菜放地儿,不卖了C . 你不能这样买菜,影响多不好D . 小心点儿,别把菜叶碰掉了。

4. (2分)“这次升学考试,我非考上奖学金不可。

”这是()A . 否定句B . 肯定句C . 双重否定句5. (2分)下列公共标语,表达不礼貌的一项是()A . (某候车室)为了您和他人的健康,请勿吸烟。

B . (某企业)今天您工作不努力,明天您努力找工作。

C . (某旅游点)禁止乱写乱画,违者重罚!D . (某建筑工地)高高兴兴上班来,平平安安回家去。

6. (2分)下列断句不正确的一项是()A . 宋人/有耕者。

B . 兔/走触株,折颈/而死。

C . 因/释其耒/而守株。

D . 兔/不可复得,而/身为宋国笑。

7. (2分)《小王子》的作者是()。

A . 蒙夫B . 圣▪埃克苏佩里C . 夏尔▪贝洛二、填空题 (共4题;共11分)8. (1分)猜一猜很字两人离,木棍左边立。

_______9. (1分)猜一猜。

头戴尖尖帽,身穿节节衣,年年二三月,脑袋钻出地。

答案:_______10. (8分)按要求写出相关人物①《水浒传》中“倒拔垂杨柳”的人物是_______。

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第三单元达标测试卷
时间:60分钟满分:100分
题号,一,二,三,四,五,六,七,八,九,总分
得分,,,,,,,,,,
基础达标我会做(33分)) (一) 汉字城堡(15分)
1.看拼音写词语。

(10分)
ábì
ǒē
ōǎ
zìāmáo dùn
xǐè
ān zǎo
lǐmào
ān àtān lán
2.辨字组词。

(4分)
3.下列字形完全正确的一组是( )(1分)
A.斟酌张口结舌画龙点晴
B.掺杂惊慌失措遥遥祝福
C.莽撞犹豫不决惊叹不己
(二) 词语广场(10分)
1.下列词语中加点的字意思全部相同的一组是( )(2分) A.欺诈诈骗尔虞我诈诈降
B.疾病残疾疾恶如仇疾走
C.虚假真假弄虚作假不假思索
D.盼望期盼左顾右盼盼头
2.“奔”读“bēn”时意思有①奔走;急跑;②逃跑;③姓。

读“bèn”时意思有④直向目的地走去;⑤年纪接近(四十岁、
五十岁等);⑥为某事奔走。

(6分)
(1)“投奔”中的“奔”读( ),意思是( )。

(2)“他是奔六十的人了”中的“奔”读( ),意思是
( )。

(3)“汽车在广阔的草原上奔驰”中的“奔”读( ),意
思是( )。

3.像“嫦娥奔月”这样来源于中国古代神话的成语还有、。

(2分)
(三) 句子花园(8分)
将谚语补充完整,并根据情境选择谚语填空。

台上三分钟,。

师傅领进门,。

要练惊人艺,。

,艺高人胆大。

1.他是全能型人才,精通很多东西,做事很有闯劲,正所谓“,”。

2.同在一个班级学习,而学习的效果却大不一样,这时我想起了老师说过的一句话:“,。


综合训练我能行(16分)
(四) 语言感悟(3分)
生活中有很多这样含有比喻义的三字词语,请你选择合适的词语填空。

A.眼中钉B.聚宝盆C.多面手D.迷魂汤
E.打擂台
1.比喻相互竞赛。

( )
2.比喻资源丰富的地方。

( )
3.比喻擅长多种技能的人。

( )
(五) 课本透视(10分)
1.还记得《红灯记》选段吗?这段唱词表现了被捕时的。

其中“防野狗”是指。

“风雪来得骤”比喻。

2.我们读书时遇到的“拦路虎”就是。

要想扫除“拦路虎”就要养成的好习惯。

查字典时不知读音的字可用查字法,知道
读音的字可用查字法。

3.这四条龙,,但奇怪的是。

游客看了,,很是,就请张僧繇把龙的眼睛补上去。

4.除了中秋佳节我还知道我国的传统节日有、、。

5.《蝉和狐狸》告诉我们(用文中原句填空):。

6.你还知道哪些伊索寓言故事:、、。

(六) 思想交流(3分)
中秋佳节月儿圆圆,各家各户家人团聚,可是小林的爸爸妈妈都在外地打工,当我们开心过节的时候小林却独自黯然泪下,你会怎么安慰他?请用上咏月的名句。

写应用我来秀(51分)
(七) 课内阅读(9分)
《推敲》片段
接着,贾岛就把自己写诗的事告诉了韩愈,并说自己正在犹豫不决,不知道是用“推”好,还是用“敲”好。

韩愈也是一位著名的诗人,便很有兴致地(思考思索)起来。

过了一会儿,他对贾岛说:“还是用‘敲’字更好些。

月夜访友,( )友人家门没有闩,( )不能莽撞推门,敲门表明你是一个懂得礼貌的人。

再说,用‘敲’字更能衬托出月夜的(宁静寂静),读起来也响亮些。

”贾岛听了,连连点头。

后来,人们就把在写诗和作文时斟酌文字叫做“推敲”。

1.在括号里填上合适的关联词语。

(1分)
2.解释词语。

(2分)
(1)莽撞:
(2)犹豫不决:
3.选择括号里合适的词语在下面画横线。

(1分)
4.韩愈认为用“敲”字更好的理由是:(1分)
5.联系全文说说贾岛是怎样的一位诗人。

(1分)
6.在文段中用横线画出“推敲”现今的意思并用“推敲”造个句子。

(3分)
(八) 课外阅读(17分)
长成一颗珍珠
很久很久以前,有一个养蚌人,他想培育一颗世界上最大最美的珍珠。

他去海边的沙滩上(挑选捡拾)沙粒,并且一颗一颗地问那些沙粒,愿不愿意变成珍珠。

那些沙粒都摇头说不愿意。

养蚌人从清晨问到黄昏,他都快要绝望了。

就在这时,有一颗沙粒答应了他。

旁边的沙粒都嘲笑那颗沙粒,说它太傻,去蚌壳里住,远离亲人朋友,见不到阳光雨露明月清风甚至还缺少空气只能与黑暗潮湿寒冷孤寂为伍不值得
可那颗沙粒还是无怨无悔地随着养蚌人去了。

斗转星移,几年过去了,那颗沙粒已长成了一颗晶莹剔透、价值连城的珍珠,而曾经嘲笑它傻的那些伙伴们,却(依然竟然)只是一堆沙粒,有的已风化成土。

如果说世上有“点石成金”的“手指”的话,那就是“艰难困苦”了。

这可是人生的至宝啊!你忍耐着、坚持着,当走过黑暗与苦难的长长的隧道之后,你或许会惊讶地发现,平凡如沙粒的你,不知不觉中,已长成了一颗珍珠。

1.将括号里不恰当的词语用“\”划去。

(2分)
2.在文中的“”里加上标点。

(5分)
3.对于那颗成为珍珠的沙粒来说,“艰难困苦”指的是。

对于我们来说,“已长成了一颗珍珠”的意思是。

(2分)
4.“这可是人生的至宝啊!”一句中“这”指的是什么?如何理解这句话?(2分)。

5.这则寓言故事告诉我们的道理是:。

(2分)
6.请补全下列含“珠”的成语。

(4分)
( )( )还珠( )上明珠
珠( )玉( ) 珠光( )气
(九) 我写我心(25分)
本单元我们通过故事认识了很多或聪明,或狡猾,或贪婪,或善良的动物或人物形象,相信你也能赋予下面这些动物个性特点。

展开丰富的想象,编写故事吧。

乌龟狐狸刺猬大象鲤鱼
提示:1.所给动物可以选择使用。

2.所编写的故事要生动合理,赋予动物个性特点。

第三组达标检测卷
一、1.墙壁妥帖说谎自相矛盾喜悦酸枣礼貌奸诈
贪婪
2.示例:
3.B
二、1
2.(1)bèn ④(2)bèn ⑤(3)bēn ①
3.示例:精卫填海夸父追日
三、台下十年功修行靠个人须下苦功夫艺多不压身 1.
艺多不压身艺高人胆大 2.师傅领进门修行靠个人
四、1 2 3
五、1.李玉和机智勇敢、英勇无畏警惕敌人特务爪牙耍花招
形势险恶,敌人越来越疯狂
2.读书时成为阅读障碍的生字勤查字典部首
音序
3.张牙舞爪形象逼真都没有画上眼睛觉得缺少神韵惋惜
4.示例:端午节春节重阳节
5.一个聪明的人,总能从别人的灾难中吸取教训
6.示例:龟兔赛跑谁的本领大狼和小羊
六、示例:小林,别难过,爸爸妈妈虽然不能和你团圆,但他们
肯定时时刻刻都在牵挂着你,“但愿人长久,千里共婵娟”,让天上的明月来传递你对爸爸妈妈的思念之情吧!
七、1.即使也
2.(1)鲁莽冒失。

(2)迟疑;拿不定主意。

3.思索宁静
4.敲门表明不莽撞,懂礼貌,“敲”字更能衬托出月夜的宁静,“敲”字读起来也响亮些。

5.贾岛是一位创作态度严谨认真的诗人。

6.后来,人们就把在写诗和作文时斟酌文字叫做“推敲”。

示例:经过仔细推敲的文章才更精彩。

八、1
2.、、、,,、、、,。

3.远离亲人朋友,见不到阳光、雨露、明月、清风,甚至还缺少空气,只能与黑暗、潮湿、寒冷、孤寂为伍
取得成功
4.“这”指艰难困苦。

只有经历艰难困苦的磨炼,才能取得令人羡慕的成绩。

5.在艰难困苦面前,只有忍耐着、坚持着,当走过黑暗与苦难的长长的隧道之后,我们才会取得成功6.买椟掌圆润宝
九、习作指导:1.编写故事要注意故事的起因、经过和结果。

2.
要自由、大胆地想象,要善于运用人格化的手法。

3.注意突出故事中动物的性格特点。

例文略。

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