寒假作业(1)

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金华市七年级数学寒假作业(含答案) (1)

金华市七年级数学寒假作业(含答案) (1)

金华市七年级数学寒假作业1一、选择题(本大题共8小题,共24.0分)1.若|a|=2,则a的值是()A. -2B. 2C.D. ±22.如图是一个由5个完全相同的小正方体组成的立体图形,它的俯视图是()A. B. C. D.3.在2018政府工作报告中,总理多次提及大数据、人工智能等关键词,经过数年的爆发式发展,我国人工智能在2017年迎来发展的“应用元年”,预计2020年中国人工智能核心产业规模超1500亿元,将150 000 000 000用科学记数法表示应为()A. 1.5×102B. 1.5×1010C. 1.5×1011D. 1.5×10124.当x=-1时,代数式3x+1的值是()A. -1B. -2C. 4D. -45.若一个角为65°,则它的补角的度数为()A. 25°B. 35°C. 115°D. 125°6.下列变形中:①由方程=2去分母,得x-12=10;②由方程x=两边同除以,得x=1;③由方程6x-4=x+4移项,得7x=0;④由方程2-两边同乘以6,得12-x-5=3(x+3).错误变形的个数是()个.A. 4B. 3C. 2D. 17.在灯塔O处观测到轮船A位于北偏西54°的方向,同时轮船B在南偏东15°的方向,那么∠AOB的大小为()A. 69°B. 111°C. 141°D. 159°8.如图,直线AB∥CD,则下列结论正确的是()A. ∠1=∠2B. ∠3=∠4C. ∠1+∠3=180°D. ∠3+∠4=180°二、填空题(本大题共6小题,共18.0分)9.若单项式2x2y m-1与y3是同类项,则m+n的值是______.10.如图是正方体的一个表面展开图,在这个正方体中,与“晋”字所在面相对的面上的汉字是______.11.如图,点A、B在数轴上对应的实数分别是a,b,则A、B间的距离是______.(用含a、b的式子表示)12.如图是两个正方形组成的图形(不重叠无缝隙),用含字母a的整式表示出阴影部分的面积为______13.已知线段AB,在AB的延长线上取一点C,使AC=2BC,在AB的反向延长线上取一点D,使DA=2AB,那么线段AC:DB=______.14.如图,AB||CD,点P为CD上一点,∠EBA、∠EPC的角平分线于点F,已知∠F=40°,则∠E=______度.三、计算题(本大题共4小题,共29.0分)15.计算:(1)1-43×(-)(2)7×2.6+7×1.5-4.1×8.16.计算:(1)-8×2-(-10)(2)-(x2y+3xy-4)+3(x2y-xy+2).17.一般情况下不成立,但有些数可以使得它成立,例如:a=b=0.我们称使得成立的一对数a,b为“相伴数对”,记为(a,b).(1)若(1,b)是“相伴数对”,求b的值;(2)若(m,n)是“相伴数对”,其中m≠0,求;(3)若(m,n)是“相伴数对”,求代数式m--[4m-2(3n-1)]的值.18.并说明星期六是盈还是亏?盈亏是多少?(2)某公司去年1~3月平均每月亏损1.5万元,4~6月平均每月赢利2万元,7~10月平均每月赢利1.7万元,11~12月平均每月亏损2.3万元,这个公司去年总的盈亏情况如何?四、解答题(本大题共6小题,共49.0分)19.解方程:(1)x-7=10-4(x+0.5)(2)-=1.20.在直线l上有A、B、C三个点,已知BC=3AB,点D是AC中点,且BD=6cm,求线段BC的长.21.如图,两条射线AM∥BN,线段CD的两个端点C、D分别在射线BN、AM上,且∠A=∠BCD=108°.E是线段AD上一点(不与点A、D重合),且BD平分∠EBC.(1)求∠ABC的度数.(2)请在图中找出与∠ABC相等的角,并说明理由.(3)若平行移动CD,且AD>CD,则∠ADB与∠AEB的度数之比是否随着CD位置的变化而发生变化?若变化,找出变化规律;若不变,求出这个比值.22.如图,以直线AB上一点O为端点作射线OC,使∠BOC=70°,将一个直角三角形的直角顶点放在点O处.(注:∠DOE=90°)(1)如图①,若直角三角板DOE的一边OD放在射线OB上,则∠COE=______°;(2)如图②,将直角三角板DOE绕点O逆时针方向转动到某个位置,若OC恰好平分∠BOE,求∠COD的度数;(3)如图③,将直角三角板DOE绕点O转动,如果OD始终在∠BOC的内部,试猜想∠BOD和∠COE有怎样的数量关系?并说明理由.23.如图,有一块长(3a+b)米,宽(2a+b)米的长方形广场,园林部门要对阴影区域进行绿化,空白区域进行广场硬化,其中,四个角部分是半径为(a-b)米的四个大小相同的扇形,中间部分是边长为(a+b)米的正方形.(1)用含a、b的式子表示需要硬化部分的面积;(2)若a=30,b=10,求出硬化部分的面积(结果保留π的形式).24.在直角三角形ABC中,若AB=16cm,AC=12cm,BC=20cm.点P从点A开始以2厘米/秒的速度沿A→B→C的方向移动,点Q从点C开始以1厘米/秒的速度沿C→A→B的方向移动,如果点P、Q同时出发,用t(秒)表示移动时间,那么:(1)如图1,请用含t的代数式表示,①当点Q在AC上时,CQ=______;②当点Q在AB上时,AQ=______;③当点P在AB上时,BP=______;④当点P在BC上时,BP=______.(2)如图2,若点P在线段AB上运动,点Q在线段CA上运动,当QA=AP时,试求出t的值.(3)如图3,当P点到达C点时,P、Q两点都停止运动,当AQ=BP时,试求出t的值.答案和解析1.【答案】D【解析】解:∵|a|=2,∴a=±2.故选:D.根据绝对值的意义即可得到答案.本题考查了绝对值:若a>0,则|a|=a;若a=0,则|a|=0;若a<0,则|a|=-a.2.【答案】B【解析】解:从上面看第一列是两个小正方形,第二列是一个小正方形,第三列是一个小正方形,故选:B.根据从上面看得到的图形是俯视图,可得答案.本题考查了简单组合体的三视图,从上面看得到的图形是俯视图.3.【答案】C【解析】解:150 000 000000=1.5×1011.故选:C.用科学记数法表示较大的数时,一般形式为a×10n,其中1≤|a|<10,n为整数,据此判断即可.此题主要考查了用科学记数法表示较大的数,一般形式为a×10-n,其中1≤|a|<10,确定a与n的值是解题的关键.4.【答案】B【解析】解:把x=-1代入3x+1=-3+1=-2,故选:B.把x的值代入解答即可.此题考查了代数式求值,熟练掌握运算法则是解本题的关键.5.【答案】C【解析】解:180°-65°=115°.故它的补角的度数为115°.故选:C.根据互为补角的两个角的和等于180°列式进行计算即可得解.本题考查了余角和补角,解决本题的关键是熟记互为补角的和等于180°.6.【答案】B【解析】解:①方程=2去分母,两边同时乘以5,得x-12=10.②方程x=,两边同除以,得x=;要注意除以一个数等于乘以这个数的倒数.③方程6x-4=x+4移项,得5x=8;要注意移项要变号.④方程2-两边同乘以6,得12-(x-5)=3(x+3);要注意去分母后,要把是多项式的分子作为一个整体加上括号.故②③④变形错误故选:B.根据方程的不同特点,从计算过程是否正确、方法应用是否得当等方面加以分析.在解方程时,要注意以下问题:(1)去分母时,方程两端同乘各分母的最小公倍数时,不要漏乘没有分母的项,同时要把分子(如果是一个多项式)作为一个整体加上括号;(2)移项时要变号.7.【答案】C【解析】【分析】此题主要考查了方向角,关键是根据题意找出图中角的度数.首先计算出∠3的度数,再计算∠AOB的度数即可.【解答】解:由题意得:∠1=54°,∠2=15°,∠3=90°-54°=36°,∠AOB=36°+90°+15°=141°,故选C.8.【答案】D【解析】解:如图,∵AB∥CD,∴∠3+∠5=180°,又∵∠5=∠4,∴∠3+∠4=180°,故选:D.依据AB∥CD,可得∠3+∠5=180°,再根据∠5=∠4,即可得出∠3+∠4=180°.本题考查了平行线的性质,解题时注意:两直线平行,同旁内角互补.9.【答案】6【解析】解:依题意得:n=2,m-1=3,所以m=4,所以m+n=2+4=6.故答案是:6.根据同类项的概念求解.本题考查了同类项的知识,解答本题的关键是掌握同类项定义中的两个“相同”:相同字母的指数相同.10.【答案】祠【解析】解:正方体的表面展开图,相对的面之间一定相隔一个正方形,“晋”与“祠”是相对面,“汾”与“酒”是相对面,“恒”与“山”是相对面.故答案为:祠.正方体的表面展开图,相对的面之间一定相隔一个正方形,根据这一特点作答.本题主要考查了正方体相对两个面上的文字,注意正方体的空间图形,从相对面入手,分析及解答问题.11.【答案】b-a【解析】解:∵点A、B在数轴上对应的实数分别是a,b,∴A,B间的距离=b-a.故答案为:b-a.用B点表示的数减去A点表示的数,即可得到A,B间的距离.本题考查了实数与数轴:实数与数轴上的点是一一对应关系.任意一个实数都可以用数轴上的点表示.12.【答案】a2-3a+18.【解析】解:阴影部分的面积=a2+62-a2-(a+6)×6=a2+36-a2-3a-18=a2-3a+18,故答案为:a2-3a+18.根据面积的和差:两个正方形的面积和减去两个三角形的面积,可得答案.本题考查了代数式求值,利用面积的和差得出关系式是解题关键.13.【答案】2:3【解析】解:∵AC=AB+BC=2BC,∴AB=BC,∴DA=2AB=2BC,∴DB=DA+AB=3AB=3BC,∴AC:DB=2BC:3BC=2:3,故答案为:2:3.由条件可求得AC=2BC,DB=3BC,计算即可.本题主要考查两点间的距离,熟练掌握线段的和差计算即可.14.【答案】80【解析】解:设∠EPC=2x,∠EBA=2y,∵∠EBA、∠EPC的角平分线交于点F,∴∠CPF=∠EPF=x,∠EBF=∠FBA=y,∵∠1=∠F+∠ABF=40°+y,∠2=∠EBA+∠E=2y+∠E,∠1=∠CPF=x,∠2=∠EPC=2x,∴∠2=2∠1,∴2y+∠E=2(40°+y),∴∠E=80°.故答案为:80.设∠EPC=2x,∠EBA=2y,根据角平分线的性质得到∠CPF=∠EPF=x,∠EBF=∠FBA=y,列方程即可得到结论.本题考查了平行线的判定和性质,角平分线的定义,正确的识别图形是解题的关键.15.【答案】解:原式=1-64×(-),=1-64×(-),=9;(2)原式=7×(2.6+1.5)-4.1×8,=7×4.1-8×4.1,=(7-8)×4.1,=-4.1.【解析】(1)根据有理数混合运算的运算顺序进行计算即可得出结论;(2)利用乘法的分配律进行计算即可得出结论.本题考查了有理数的混合运算,牢记有理数混合运算的运算法则是解题的关键.16.【答案】解:(1)原式=-16+10=-6;(2)原式=-x2y-3xy+4+3x2y-3xy+6=2x2y-6xy+10.【解析】(1)先计算乘法,再计算减法可得;(2)先去括号,再合并同类项可得答案.本题主要考查整式的加减运算和有理数的混合运算,解题的关键是熟练掌握整式和有理数的混合运算顺序及运算法则.17.【答案】解:(1)将a=1,代入有,+=,化简求得:b=-;(2)根据题意,得:+=,则15m+10n=6m+6n,∴9m+4n=0,9m=-4n,=-;(3)由(2)知9m+4n=0,则原式=m-n-4m+2(3n-1)=m-n-4m+6n-2=-3m-n-2=--2=-2.【解析】(1)结合题中所给的定义将(1,b)代入式子求解即可;(2)由定义知+=,整理得9m+4n=0,据此进一步求解可得;(3)原式去括号、合并同类项、整理得出原式=--2,将(2)中9m+4n=0代入可本题考查了整式的加减,解答本题的关键在于熟读题意,根据题中所给的定义进行求解即可.18.【答案】(1)解:星期六盈亏情况为:458-(-27.8-70.3+200+138.1-8+188)=38 星期六盈利,盈利38元;(2)记盈利额为正数,亏损额为负数,公司去年全年盈亏额(单位:万元)为(-1.5)×3+2×3+1.7×4+(-2.3)×2=3.7,答:这个公司去年全年盈利3.7万元.【解析】设星期六为x元,根据题意可得等量关系:七天的盈亏数之和=458,根据等量关系列出方程,再解方程即可.此题主要考查了一元一次方程的应用,关键是正确理解题意,找出题目中的等量关系,列出方程.正确理解正负数的意义.19.【答案】解:(1)去括号,得x-7=10-4x-2,移项,得x+4x=10+7-2,合并同类项,得5x=15,解得x=3,(2)去分母,得2(5x+1)-(2x-1)=6,去括号,得10x+2-2x+1=6,移项,合并同类项,得8x=3,系数化为1,得x=.【解析】(1)根据解方程,可得答案;(2)根据解方程,可得答案.本题考查了解一元一次方程,去分母是解题关键,不含分母的项也乘最小公倍数.20.【答案】解:(1)当C在AB的延长线上时,∵BC=3AB,∵AC=4AB,∵点D是AC中点,∴AD=CD=2AB,∵BD=6cm,∴AD-AB=2AB-AB=BD=6 cm,∴AB=6cm,∴AC=4AB=24cm,∴BC=AC-AB=24cm-6cm=18cm;(2)当C在BA的延长线上时,∵BC=3AB,∵AC=2AB,∵点D是AC中点,∴AD=CD=AB,∵BD=6cm,∴AB=3cm,∴BC=3AB=9cm.【解析】分为两种情况,画出图形,求出线段AB的长,即可得出答案.本题考查了求两点之间的距离,能求出符合的所有情况是解此题的关键.21.【答案】解:(1)∵AM∥BN,∴∠A+∠ABC=180°.∴∠ABC=180°-∠A=180°-108°=72°.(2)与∠ABC相等的角是∠ADC、∠DCN.∵AM∥BN,∴∠ADC=∠DCN,∠ADC+∠BCD=180°.∴∠ADC=180°-∠BCD=180°-108°=72°.∴∠DCN=72°.∴∠ADC=∠DCN=∠ABC.(3)不发生变化.∵AM∥BN,∴∠AEB=∠EBC,∠ADB=∠DBC.∵BD平分∠EBC,∴∠DBC=∠EBC,∴∠ADB=∠AEB,∴∴=.【解析】(1)由平行线的性质可求得∠A+∠ABC=180°,可则可求得答案;(2)利用平行线的性质可求得∠ADC=∠DCN,∠ADC+∠BCD=180°,则可求得答案;(3)利用平行线的性质,可求得∠AEB=∠EBC,∠ADB=∠DBC,再结合角平分线的定义可求得答案.本题主要考查平行线的性质,掌握平行线的性质是解题的关键.22.【答案】(1)20(2)如图②,∵OC平分∠EOB,∠BOC=70°,∴∠EOB=2∠BOC=140°,∵∠DOE=90°,∴∠BOD=∠BOE-∠DOE=50°,∵∠BOC=70°,∴∠COD=∠BOC-∠BOD=20°;(3)∠COE-∠BOD=20°,理由是:如图③,∵∠BOD+∠COD=∠BOC=70°,∠COE+∠COD=∠DOE=90°,∴(∠COE+∠COD)-(∠BOD+∠COD)=∠COE+∠COD-∠BOD-∠COD=∠COE-∠BOD=90°-70°=20°,即∠COE-∠BOD=20°.【解析】解:(1)如图①,∠COE=∠DOE-∠BOC=90°-70°=20°,故答案为:20;(2)见答案(3)见答案(1)根据图形得出∠COE=∠DOE-∠BOC,代入求出即可;(2)根据角平分线定义求出∠EOB=2∠BOC=140°,代入∠BOD=∠BOE-∠DOE,求出∠BOD,代入∠COD=∠BOC-∠BOD求出即可;(3)根据图形得出∠BOD+∠COD=∠BOC=70°,∠COE+∠COD=∠DOE=90°,相减即可求出答案.本题考查了度、分、秒之间的换算,角的计算的应用,能根据图形求出各个角的度数是解此题的关键.23.【答案】解:(1)需要硬化部分的面积=(3a+b)(2a+b)-(a+b)2-π(a-b)2;(2)当a=30,b=10,硬化部分的面积=(90+10)×(60+10)-402-π×202=(5400-400π)平方米.【解析】(1)用长方形的面积分别减去正方形的面积和四个扇形的面积可得到需要硬化部分的面积;(2)把a和b的值代入(1)中的代数式中计算即可.本题考查了代数式的求值:求代数式的值可以直接代入、计算.如果给出的代数式可以化简,要先化简再求值.也考查了列代数式.24.【答案】(1)①t;②t -12 ;③ 16-2t;④ 2t-16.(2)由题意得,12-t=2t,解得,t=4;(3)∵AQ=BP∴当点P在线段AB上运动,点Q在线段CA上运动时,12-t=16-2t,解得,t=4,当点P在线段BC上运动,点Q在线段CA上运动时,12-t=2t-16,解得,t=,当点P在线段BC上运动,点Q在线段AB上运动时,t-12=2t-16,解得,t=4(不合题意)则当t=4或t=时,AQ=BP.【解析】解:(1)①当点Q在AC上时,CQ=t;②当点Q在AB上时,AQ=t-12;③当点P在AB上时,BP=16-2t;④当点P在BC上时,BP=2t-16;故答案为:t;t-12;16-2t;2t-16;(2)由题意得,12-t=2t,解得,t=4;(3)∵AQ=BP∴当点P在线段AB上运动,点Q在线段CA上运动时,12-t=16-2t,解得,t=4,当点P在线段BC上运动,点Q在线段CA上运动时,12-t=2t-16,解得,t=,当点P在线段BC上运动,点Q在线段AB上运动时,t-12=2t-16,解得,t=4(不合题意)则当t=4或t=时,AQ=BP.(1)根据三角形的边长、点的运动速度解答;(2)根据题意列出方程,解方程即可;(3)分点P在线段AB上运动,点Q在线段CA上运动、点P在线段BC上运动,点Q 在线段CA上运动、点P在线段BC上运动,点Q在线段AB上运动三种情况列出方程,解方程即可.本题考查的是三角形的知识,掌握点在三角形的各边上的运动情况是解题的关键.。

寒假作业(1) 2022-2023学年部编版语文八年级上册(字词类。有答案)

寒假作业(1)  2022-2023学年部编版语文八年级上册(字词类。有答案)

寒假作业(1)——2022-2023学年八年级语文人教部编版1.下列加粗字的注音全都正确的一项是()A.飞漱其间(sù)素湍绿潭(tuān)B.能与其奇者(yū)盖竹柏影也(bǎi)C.沿溯阻绝(sù)林寒涧肃(jiàn)D.夕日欲颓(tuí)藻、荇交横(hèng)2.下列加粗字的注音有误的一项是()A.万仞(rèn)冀州(jì)豫南(yù)山北之塞(sè)B.魁父(kuí)垣曲(yuán)叩石(kòu)孀妻弱子(shuāng)C.穷匮(kuì)始龀(chǐ)箕畚(běn)一厝朔东(cuò)D.陇断(lǒng)智叟(sǒu)荷担(hè)出入之迂(yū)3.下列词语书写完全正确的一项是()A.寓居庐荟掌故正人君子B.疲倦祥细漏泄难以下咽C.樱花改悔宛如毫不介意D.落弟适值呜呼颇受优待4.下列各项中书写无误的一项是()A.迀腐吆喝辟邪纵横绝荡B.松懈奉献驻扎素未谋面C.交卸狼籍赋闲触目伤怀D.俯瞰遏制点缀神彩飞扬5.下列词语书写和加粗字的注音全都正确的一项是()A.桅杆(wēi)循声(xún)映衬一丝不苟(gǒu)B.绽放(zhàn)着陆(zháo)堕毁无怨无悔(yuàn)C.默契(qì)瞬间(shùn)揪心惊心动魄(pò)D.咆哮(páo)湛蓝(zhàn)娴熟海浪澎湃(bài)6.下列字音、字形完全正确的一项是()A.瞥见(piē)骤雨(zhòu)窒息窈无消息B.诘责(jié)吹嘘(xū)不辍藏污纳垢C.佃农(tián)匿名(nì)凄然鹤立鸡群D.黝黑(yǒu)滞留(zhì)愚顿筋疲力尽7.下列词语书写及加粗字的注音完全正确的一项是()A.臼齿(jiù)濒临(pīn)繁殖茸毛(róng)B.凋谢(diāo)震颤(chàn)深渊兴味(xìng)C.飓风(jù)洗涤(tiáo)星辰赐予(cì)D.遏制(è)卑微(bēi)销逝点缀(zhuì)8.下列句中加粗字的注音或字形完全正确的一项是()A.全桥结构匀称(chèn),和四周景色配合得十分和谐;桥上的石栏石板也雕刻得古朴美观。

一年级数学寒假作业1(1)

一年级数学寒假作业1(1)

河南师大附中双语国际学校一年级寒假作业班级:姓名:第一单元练习题(1)一、看图圈数。

二、看图写数。

( ) ( ) ( ) 三、动手画一画。

★★★★★★★★四、数一数,比一比。

1.在多的后面画“√”。

2.在少的后面画“√”。

3.在最多的下面的□里画“√”。

四、帮动物找家,连一连。

第一单元练习题(2)一、连一连。

二、数一数,在○里涂色。

○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○三、把同样多的用线连起来。

4 2 3 7四、数一数,连一连。

五、数一数,在横线上画出相应的“○”。

你家里有几口人?今年你几岁了?你的小组有几个同学?第二单元练习题(1)一、开心圈一圈。

在的(上下)边,在(上下)边;在的(左右)边,,在的(左右)边。

二、看一看,画一画。

(1)在☆的左边画○。

(2)在☆的右边画▲。

(3)在◇的右边画⊙。

三、看一看,说一说。

小猴的前面是( ),后面是( )。

小免的前面是( ),后面是( )。

( )的前面是蚂蚁,后面是小兔。

四、最重的画“√”,最轻的画“○”小兔()小狗()小熊()五、在()里填上正确答案。

六、看图填一填。

2.货车在客车的()面,客车在货车的()面。

火车在客车的()面,火车在轮船的()面。

1.爸爸的()手牵着宝宝,妈妈的()手牵着宝宝。

宝宝的()边是爸爸,宝宝的()边是妈妈。

第二单元练习题(2)一、想一想,圈一圈。

1.有()个○,有()个☆。

2.○比☆(),☆比○()。

3.添上()个☆,☆和○同样多;去掉()个○,○和☆同样多。

二、将正确的序号填在括号里。

1.③号车前面是()号车。

2.⑤号车后面是()号车。

3.①号车在()号车和()号车的前面,在()号车和()号车的后面。

三、填一填,一定要仔细观察。

(1)桃子的( )面是苹果。

(2)梨子的( )面是苹果。

(3)菠萝的( )面是香蕉。

(4)西瓜的( )面是菠萝。

四、根据要求涂颜色 。

1.中间的一个涂黑色。

高二语文模拟题1

高二语文模拟题1

语文寒假作业(一) 班级 姓名 小组___________【高考复习】1.下列各项中,对加点词语的解释全部正确的一项是( ) A .敏于事而慎于言 ①敏:机敏 ②慎:谨慎 B .质胜文则野 ①文:华美、文采 ②野:不受拘束 C .君子喻于义,小人喻于利 ①喻:比喻 ②利:利益 D .迩之事父 ①迩:近 ②事:侍奉 2.对下列句子中加点词的解释,不正确的一项是( ) A .君子喻.于义 喻:知晓,明白 B .请事.斯语矣 事:听从 C .致知在格.物 格:推究 D .恻隐之心,仁之端.也 端:萌芽,发端 3.下列句子中加点词的意思和例句相同的一项是( ) 例句:师者,所以传道.受业解惑也 A .就有道.而正焉 B .策之不以其道. C .任重而道.远 D .朝闻道.,夕死可矣 4.下列各句中,有通假字的一项是 ( ) A. 士不可以不弘毅 B. 多识于鸟兽草木之名 C. 知者不惑 D. 敏于事而慎于言 5.下列各句中加点的词语与现代汉语意义不同的一项是 ( ) A. 有一言而可以终身..行之者乎 B. 小子..何莫学夫《诗》 C. 勇者..不惧 D. 多识于鸟兽..草木之名 6.下列各句中的加点词语,没有词类活用现象的一项是 ( ) A. 朝.闻道,夕.死可矣 B. 风.乎舞雩 C. 己所不欲.,勿施于人 D. 见贤.思齐焉 7.下列各句中加点词的意义和用法,相同的一项是( ) A .大学之.道 不以其道得之. B .在止于至善 古之欲明明德于.天下者 C .壹是皆以.修身为本 此吾祖太常公宣德间执此以.朝 D .欲治其.国者 其.皆出于此乎 8.下列选项中,对加点词语的解释全都正确的一项是( ) A .大学之道.,在明明.德 ①道:道理 ②明:美好的 B .在亲.民,在止.于至善 ①亲:亲近爱抚 ②止:停止 C .定而后能静.,静而后能安. ①静:心不妄动 ②安:平安 D .物格.而后知至 ①格:推究 ②知:知道 9.下列关于古代文化常识的解说,不正确的一项是( ) A .《论语》是孔子及其弟子的语录结集,集中体现了孔子的政治主张、伦理思想和教育原则等,与《大学》《诗经》《孟子》合称“四书”。

寒假作业1

寒假作业1

遂宁东辰荣兴国际学校高2015级地理寒假作业 时长:40分钟 使用时间:2014级 月 日 编号:001编写人:程均 审题人:宁显万 学生姓名: 评分《寒假作业1》 一、选择题2010年全球极端天气事件频发,从俄罗斯的高温森林大火、巴基斯坦水灾到美国东部的持续高温等,种种灾难事件让人们认识到气候变化带来严重后果的同时,也对将于11月29日召开的联合国坎昆气候变化会议更有期待。

读图回答1—2题。

1.影响图中海平面变化的主要因素是A .气候的变化B .地壳运动C .地球运动D .宇宙的演化 2.图中代表冰期与间冰期的分别是A .③①与④②B .①②与③④C .③④与①②D .①④与③②天文辐射指的是大气上界的太阳辐射,图甲、乙中的曲线表示不同纬度的天文辐射(大气上界的太阳辐射)的年变化和北半球不同纬度地面太阳辐射的年变化,读图完成3—5题。

3.甲、乙两图表示北极点和赤道的曲线是A .⑤C 和②B B .⑥D 和①AC .③B 和②AD .④C 和③D 4.北半球同一纬度地区甲图中曲线的数值均大于乙图曲线的数值的原因是 A .受海陆热力性质影响 B .受海拔高度的影响 C .受大气的影响 D .受太阳高度的影响5.12月22日南极点的天文辐射日总量比6月22日北极点天文辐射日总量多,原因可能是 A .南极地区是陆地 B .北极地区是海洋 C .南极海拔高 D .日地距离差异图1为我国某区域某月平均气温(单位:℃)图,读图回答6—8题。

6.M、N两地的气温差值T可能为()A.8℃≤T≤16℃B.12℃<T≤14℃C.8℃≤T<14℃D.12℃<T≤16℃7.P、Q两地等温线弯曲状况表明()A.P地气温高于两侧,地势低B.Q地气温高于两侧,地势低C.P地气温高于两侧,地势高D.Q地气温低于两侧,地势低8.下列叙述正确的是()A.N地太阳能资源比P地丰富B.该季节N地可见大面积油菜C.Q地旅游的环境承载量较大D.M地人口密度大于N地图2为我国某区域山地植被垂直带结构示意图。

高一地理寒假作业(1)含答案

高一地理寒假作业(1)含答案

高一地理寒假作业(1)一、单项选择题(本题共15小题)凌日是指地内行星(运行轨道在地球轨道和太阳之间的行星)在绕日运行时恰好处在太阳和地球之间,这时地球上的观测者可看到日面上有一个小黑点缓慢移动。

当金星与太阳、地球排成一条直线时,就会发生金星凌日现象。

据此完成下面小题。

1.假若发生金星凌日现象,则下列四图能正确表示凌日的是( )A.A B.B C.C D.D2.威胁“新视野号”飞船在太空中安全运行的太阳活动是①黑子②耀斑③日珥④太阳风A.①③ B.②③ C.③④ D.②④研究发现,距离地球4.66亿光年有一绕恒星公转的行星WASP-104b,其体积与木星相似,温度高,有“黑炭行星”之称。

完成下面小题。

3.该行星温度高的原因是A.距离太阳近 B.距离绕转恒星近C.内部能量释放多D.大气稀薄4.该行星成为“黑炭行星”的主要原因有①其地表物质组成是黑色的②其大气吸收了大部分可见光③其光线被其它天体遮挡④其距离地球远,难以被观察A.①③ B.①④ C.②③ D.②④成语“蜀犬吠日”是指四川盆地的狗不常见太阳,看到太阳后就觉得奇怪,就要叫。

据此完成下面小题。

5.对于“蜀犬吠日”这种现象解释最合理的是()A.四川气候湿润,地形封闭,云雨天气多,对太阳的辐射削弱作用强B.四川盆地纬度低,光照时间短C.四川盆地海拔低,距离太阳遥远,得到的太阳辐射少D.四川盆地地势低,周围的山地高原遮挡了较多的太阳辐射6.下列说法正确的是()A.太阳辐射的能量主要集中在红外光波段B.“蜀犬”看到的太阳实际是太阳的光球层C.太阳能量主要来自于内部核裂变D.地球上绝大多数能源都来自太阳能,比如风能、核能和化石能源2019年春节期间,根据刘慈欣同名小说改编的电影《流浪地球》在我国内地上映。

电影讲述了在未来,太阳将毁灭,地表冰封,面对绝境,人类将开启“流浪地球”计划,不料在地球推进至木星附近出了意外。

下图为影片剧照。

据此完成7—8题。

7.地球在向木星推进的过程中,需要穿越()A.水星轨道B.小行星带C.土星轨道D.天王星轨道8.“流浪地球”计划反映太阳对地球的影响是()A.扰乱地球磁场B.无线电短波通信中断C.提供光热资源D.直接提供矿物燃料读我国近地面年太阳辐射总量分布图(下左图)和北半球大气上界太阳辐射分布图(下右图),完成下面小题。

必修1寒假作业1

必修1寒假作业1

1.关于质点的概念,下面叙述正确的是
9.一学生在练习使用电磁打点计时器时,纸带上
12.下列说法中的“快”,指加速度较大的是() A.小轿车比大卡车启动得快
B.协和式客机能在两万米高空飞行得很快
C.乘汽车从烟台到济南,如果走高速公路能很快到达
D.汽车在紧急刹车的情况下,能够很快地停下来
13.根据给出的速度和加速度的正、负,对下列运动性质的判断正确的是()
A.v0>0,a<0,物体做加速运动
B.v0<0,a<0,物体做加速运动
C.v0<0,d>0,物体做减速运动
D.v0>0,a>0,物体做加速运动
14一支300m长的队伍,以1m/s的速度行军,通讯员从队尾以3m/s的速度赶到队首,并立即
以原速率返回队尾,求通讯员的位移和路程各
是多少?15.在一条平直的公路上,乙车以v乙=10m/s的速度匀速行驶,甲车在乙车的后面作初速度为v 甲=15m/s,加速度大小为a=0.5m/s
2的匀减速运动,则两车初始距离L满足什么条件时可以使(设两车相遇时互不影响各自的运动):
(1)两车不相遇;
(2)两车只相遇一次;
(3)两车能相遇两次。

牛津8A英语寒假作业(1)及答案

牛津8A英语寒假作业(1)及答案

8A牛津英语寒假作业(1)一.词汇.A.根据所给中文写出正确的单词。

1.We got off the ____________________(长途汽车)and went into the park.2.What do you think is the most ___________________(不重要的) in poor countries ?3.I hope you can give me some ______________________(建议).4.When he is hungry ,he always_____________________(敲)on the cage.5.They are all the ___________________(英雄) in the history.6.They like ___________________food .7.We must remember those ____________________ .8.You can have some ____________________lessons at the school .9.He doesn‟t know how to look after_____________________ .10.Do you think Betty is __________________ of her three sisters ?11.We have a great time_____________________ to each other .12._________________________in a big city is very interesting .13.I________________________ an interesting film at present .14.He never __________________ out at night .15.David________________________ off the bus yesterday .二.选择题( )1.---Mum, may I watch TV now? ---No, you finish your homework first.A. mustn‟t B .must C. need D. can‟t( )2.---You look today, Julia!---Yeah, I‟ve got an MP3.It‟s a birthday present from my parents.A. sadB. worriedC. happyD. tried( )3.---Why did you come to school late this morning?--- I watched the Football World Cup until 12 o‟clock last night.A. IfB. BecauseC. SinceD. though()4. It is ____useful book. 1 borrowed it from ____school library.A. an; aB. a; anC. a; theD. an; the( )5. We can do the work better with____ money and ____ people.A. less, fewerB. fewer, lessC. less, lessD. fewer, fewer( )6. While I____ with my friend, she came in.A. am talkingB. was talkingC. talkedD. am going to talk( )7. All of us enjoy playing computer games, ___ we can't spend too much time on it.A. andB. orC. butD. so( )8. Would you please tell me____?A. what was her nameB. what her name wasC. what is her nameD. what her name is( )9.—We can use QQ to talk with each other on the Internet.— Really? Will you please show me ____ it?A. what to useB. how to useC. how can I useD. what can I use ( )10.—Mum,could I have an MP3 like this?—Certainly, we can buy one, but as good as this. The price of this kind is a little high.A.a cheapB.a cheaperC.a smallD.a smaller( )11.—Can I help you? —I‟d like for my twin daughters.A.two pair of shoesB.two pairs of shoeC.two pair of shoeD.two pairs of shoes( )12.—You watched the fashion show last night, didn‟t you?—Yes, I missed the beginning.A.soB.andC.butD.then( )13.I feel it hard to keep up with my classmates. But whenever I want to , my teacher always encourages me to work harder.A.go onB.give upC.run awayD.give back( )14.How time flies! Three years really a short time.A.isB.areC.wasD.were( )15.---Mum, we‟re going to visit an island this weekend. --- !A. GoodbyeB. That‟s OKC. Not at allD. Have a good trip三.完型填空You really have to get very old before you find you're old. I'm in my middle fifties and I don't feel old yet. However, sometimes I look back at my childhood and 1 things to the lifestyle that is for 2 kids. Some things have certainly changed.One area of change is television. When I started school, most people didn't have a television; TV was just beginning to get 3 . My father 4 to go all out(尽全力) and buy a 16-inch black and white set. I still remembered 5 the Disney cartoon films. That was exciting!Now, Televisions have larger pictures in full color. The pictures are clearer and the sound is much more 6 . The new high definition(高清晰度)sets are as clear as 7 screens.The type and number of programs have 8 greatly. There are hundreds of channels(频道)and more shows than one person could ever watch. There are many fine entertainment and educational shows. There's also a lot of garbage that most parents don't want their kids to watch. 9 ,we have more choices(选择), and that is good.I wonder what 10 will be like when today's kids are my age.1. A. forget B. remember C. compare D. miss2. A. today's B. yesterday's C. tomorrow's D. future's3. A. gone B. new C. expensive D. popular4. A. made B. decided C. hoped D. tried5. A. making B. watching C. preparing D. buying6. A. untrue B. loud C. high D. realistic7. A. movie B. television C. radio D. telephone8. A. lost B. increased C. watched D. played9. A. As usual B. Above all C. Besides D. Especially10. A. movies B. food C. cars D. televisions四.阅读理解AWhen Kyle walked into Ernie‟s Pet World, he looked very anxious. The shop owner, Ernie, jumped out of his seat to greet Kyle. He was the shop‟s first customer of the day.“Good morning, sir!”Ernie said,“What can I help you with?”“Well, I ……”Kyle started to say.“Wait, don‟t tell me,”Ernie stopped him.“You‟re looking for a …a little dog… for your daughter‟s birthday, Right?”“Not really, I just….”Ernie didn‟t let him finish. “Ah, I‟ve got it, You just moved to a new office, and you want some fish for it, I have some very nice fish bowls over here.”“In fact, I…”Kyle was starting to look very nervous and strange.“No fish? Ah, a cat! You look like a cat person. At Ernie‟s Pet World, we have the best cats. Take a look at this lovely one with long, white hair, She‟s looking at you. She‟s thinking,…Take me home. Take me home.‟Would you like some cat food and toys, too?”“No, thank you,”Kyle said. By this time, he was walking u p and down. He had a terrible look on his face.“Really, I‟m not interested in cats or fish or little dogs.”“What do you want, then?”Ernie asked.Kyle looked like he was going to cry.“I just want to know if can use your toilet!”he said at last.( )1.Whic h is TRUE about Ernie‟s Pet World?A. It has many workers.B. Kyle goes there often.C. It sells school things.D. Ernie is the owner of the shop.( )2.What kind of person is Ernie?A. Very lazy.B. Rather shy.C. Over warm-hearted.D. Not friendly.( )3.Kyle went into the Ernie‟s Pet World to .A. buy a little dogB. take fish homeC. meet the shop ownerD. look for a washroom( )4.What does the underlined word“anxious”mean in Chinese?A.焦急的B.兴奋的C.生气的D.失望的( )5.What is the best title of the story?A. Kyle and ErnieB. Pet or ToiletC.A Pet LoverD.A Busy Pet ShopBDo you know Fei Junlong and Nie Haisheng? Fei Junlong was born in 1965. He is a Chinese astronaut selected(选拔)as a member of the Shenzhou program. He was born in Jiangsu and joined the People‟s Liberation Army Air Force(中国人民解放军空军)in 1982 at the age of 17. And since then he has only returned home six times. As a fighter pilot(战机飞行员), he was selected to an astronaut in 1998.He married Wang Jie in 1991 and has one son.Nie Haisheng was born in September 1964. He is also a Chinese astronaut selected for the Shenzhou program. He is from Hubei. After graduating from high school he joined the People‟s Liberation Army Air Force, and became a fighter pilot. In 1998 he was selected for the astronaut program.He was one of the three astronauts who were in the final group to train for the Shenzhou 5 fight. Yang Liwei was also picked out for the flight, with Zhai Ahigang.On September 23,2005 it was reported that Zhai and Nie would be one of the three pairs of astronauts who would be in the final training for Shenzhou 6. But in the end, Fei and Nie were chosen, and Zhai missed his chance to space again.Nie Haisheng got married to Nie Jielin and has an 11-year-old daughter.( )6.When did Nie join the army?A.In 1982.B.In 1998.C.In 1991.D.After his graduation from high school. ( )7.Who among the astronauts in this passage hasn‟t been to saace?A.Zhai Zhigang.B.Nie Haisheng.C.Yang Liwei.D.Fei Junlong.( )8.How many times has Fei Junlong returned home since he left at the age of 17?A.Three times.B.Four times.C.Six times.D.Eight times.( )9.How many people did the writer mention in this passage?A.5.B.6.C.7.D.8.( )10.Which of the following is TRUE according to this passage?A.Yang Liwei was born in Jiangsu.B.Nie Haisheng has an elever-year-old daughter.C.Fei Junlong is one year older than Nie Haisheng.D.Zhai Zhigang got married to Nie Jielin and has a son.阅读下面短文,根据短文内容回答下列各题。

2022-2023学年人教新版八年级(上)数学寒假作业(1-5)

2022-2023学年人教新版八年级(上)数学寒假作业(1-5)

2022-2023学年人教新版八年级(上)数学寒假作业(一)一.选择题(共8小题)1.如图,△ABC中,AD是△ABC的角平分线,AE是△ABC高线,当∠B=42°,∠C=66°时,∠DAE的度数为()A.6°B.8°C.10°D.12°2.如图,在Rt△ABC中,∠C=90°,∠ABC的平分线BD交AC于点D,若AD=5cm,CD=4cm,则点D到直线AB的最小值是()A.2cm B.3cm C.4cm D.5cm3.如图.已知在△ABC中,AC的垂直平分线交AC于点D,交BC于点E,连接AE.若△ABE的周长为13,则AB+BC的值为()A.10B.13C.16D.184.下列等式从左到右的变形中,属于因式分解的是()A.m(n﹣5)=mn﹣5m B.m2﹣4m=(m﹣2)2﹣4C.x2﹣81y2=(x+9y)(x﹣9y)D.x2﹣y2﹣5=(x+y)(x﹣y)﹣5 5.已知:32m=4,32n=8,则9m﹣n+1的值是()A.﹣2B.C.4D.6.如图,在△ABC中,AC=4cm,线段AB的垂直平分线交AC于点N,△BCN的周长是7cm,则BC的长为()A.1cm B.2cm C.3cm D.4cm7.关于x的方程=a﹣1无解,则a的值是()A.a=1B.a=0或a=﹣1C.a=﹣1D.a=1或a=0 8.分式方程=有增根,则m的值为()A.0和3B.1C.1和﹣2D.3二.填空题(共6小题)9.已知m是关于x的方程x2﹣2x﹣3=0的一个根,则2m2﹣4m=.10.已知多项式x2﹣2(m﹣1)x+16是关于x的完全平方式,则m的值为.11.已知点P(m﹣1,n+2)与点Q(2m﹣4,2)关于x轴对称,则(m+n)2022的值是.12.如图,已知点O为△ABC的两条角平分线的交点,过点O作OD⊥BC于点D,且OD =4.若△ABC的周长是17,则△ABC的面积为.13.如图,∠ACD是△ABC的一个外角,CE平分∠ACD,若∠A=60°,∠B=40°,则∠DCE的大小是度.14.如图,已知∠ACB=100°,OA平分∠BAC,OB平分∠ABC,则∠AOB=°.三.解答题(共6小题)15.如图,FA⊥EC,垂足为E,∠C=20°,∠F=40°.求∠FBC的度数.16.如图,在△ABC中,D是AB上一点,CF∥AB,DF交AC于点E,DE=EF.(1)求证:△ADE≌△CFE;(2)若AB=5,CF=3,求BD的长.17.如图,在△ABC中,AB=AC,点D、E、F分别在AB、BC、AC边上,且BE=CF,BD=CE.(1)求证:△DEF是等腰三角形;(2)当∠A=40°时,求∠DEF的度数.18.把下列多项式进行因式分解(要写出必要的过程):(1)﹣x2y+6xy﹣9y;(2)a2(x﹣y)+4b2(y﹣x).19.先化简,再求值:,试从0,1,2,3四个数中选取一个你喜欢的数代入求值.20.计算:(1)﹣;(2)﹣÷.2022-2023学年人教新版八年级(上)数学寒假作业(二)一.选择题(共8小题)1.已知:a2﹣3a+1=0,则a+﹣2的值为()A.+1B.1C.﹣1D.﹣52.若分式的值为零,则x的值是()A.1B.﹣1C.±1D.23.若x,y均为正整数,且2x+1•4y=128,则x+y的值为()A.3B.5C.4或5D.3或4或5 4.如图,△ABC中,BD平分∠ABC,BC的中垂线交BC于点E,交BD于点F,连接CF.若∠A=60°,∠ABD=24°,则∠ACF的度数为()A.48°B.36°C.30°D.24°5.如图,AB∥CD,BP和CP分别平分∠ABC和∠DCB,AD过点P,且与AB垂直.若AD =8,则点P到BC的距离是()A.8B.6C.4D.26.如图是由4个相同的小正方形组成的网格图,其中∠1+∠2等于()A.150°B.180°C.210°D.225°7.如图,△ABC中,BO,CO分别是∠ABC,∠ACB的平分线,∠A=50°,则∠BOC等于()A.110°B.115°C.120°D.130°8.在△ABC中,∠A:∠B:∠C=3:4:5,则∠C等于()A.45°B.60°C.75°D.90°二.填空题(共6小题)9.如图,AB∥CD,∠1、∠2、∠3是五边形ABCDE的外角,若∠1+∠3=70°,则∠2=°.10.如图,在Rt△ABC中,∠C=90°,AD是∠BAC的平分线,CD=3,AB=6,则△ABD 的面积是.11.等腰三角形一腰上的高与另一腰的夹角为30°,则它的顶角为.12.多项式x2+mx+5因式分解得(x+5)(x+n),则m=,n=.13.已知关于x的分式方程﹣=1的解为负数,则k的取值范围是.14.若,则的值为.三.解答题(共6小题)15.先化简:,并从0,﹣1,2中选一个合适的数作为a的值代入求值.16.先化简,再求值:4(x﹣1)2﹣(2x+3)(2x﹣3),其中x=﹣1.17.在△ABC中,AD平分∠BAC,BD⊥AD,垂足为D,过D作DE∥AC,交AB于E,若AB=5,求线段DE的长.18.如图,DE⊥AB于E,DF⊥AC于F,若BD=CD,BE=CF.求证:(1)AD平分∠BAC;(2)AC=AB+2BE.19.如图,FA⊥EC,垂足为E,∠C=20°,∠F=40°.求∠FBC的度数.20.如图,在△ABC中,点D是边BC上一点,DE⊥AB于点E,连接CE,∠ACE=∠BCE,∠ACB=50°,∠B=60°.求∠CED的度数.2022-2023学年人教新版八年级(上)数学寒假作业(三)一.选择题(共8小题)1.如图,将直尺与含30°角的三角尺摆放在一起,若∠1=20°,则∠2的度数是()A.30°B.40°C.50°D.60°2.小明把一副含45°,30°的直角三角板如图摆放,其中∠C=∠F=90°,∠A=45°,∠D=30°,则∠α+∠β等于()A.180°B.210°C.360°D.270°3.如图,在△ABC中,∠B=40°,∠A=∠C,AF=CD,AE=CF,则∠EFD等于()A.50°B.60°C.70°D.80°4.如图所示,有一池塘,要测池塘两端A、B的距离,可先在平地上取一个可以直接到达A 和B的点C,连结AC并延长到D,使CD=CA.连结BC并延长到E,使CE=CB,连结DE,那么量出DE的长就是A、B的距离.其中的依据是全等三角形的判定条件()A.SSS B.SAS C.ASA D.AAS5.已知点P(a,3),Q(﹣2,b)关于x轴对称,则a+b的值为()A.1B.−1C.5D.﹣56.下列计算正确的是()A.a3+a3=a6B.(3a﹣b)2=9a2﹣b2C.a6b÷a2=a4b D.(﹣ab3)2=a2b3 7.分式中的a、b的值同时扩大到原来的10倍,则此分式的值()A.是原来的20倍B.是原来的10倍C.是原来的D.不变8.下列式子:,,,,其中分式的共有()A.2B.3C.4D.5二.填空题(共6小题)9.化简的结果是.10.代数式x2+4x+k是一个完全平方式,则k=.11.等腰三角形一腰上的高与另一腰的夹角为36°,则该等腰三角形的底角的度数为.12.如图所示,AB=AC,AD=AE,∠BAC=∠DAE,∠1=25°,∠2=30°,则∠3=.13.一个n边形的每个内角都等于144°,则n=.14.如图,工人师傅在安装木制门框时,为防止变形常常钉上两根木条,这样做的依据是.三.解答题(共6小题)15.如图是一个凹多边形,∠A=90°,∠C=106°,∠D=116°,∠E=100°;求∠1+∠2的值.16.如图,在△ABC中,∠C=90°,AD平分∠CAB,DE⊥AB于点E,点F在AC上,BE =FC.求证:BD=DF.17.如图,在△ABC中,AB=AC,D为BC边上一点,∠B=32°,∠BAD=42°,求∠DAC的度数.18.因式分解(1)﹣2a3+12a2﹣18a(2)9a2(x﹣y)+4b2(y﹣x)19.计算:(﹣)﹣2+4×(﹣1)2019﹣|﹣23|+(π﹣5)020.化简:(﹣)÷.2022-2023学年人教新版八年级(上)数学寒假作业(四)一.选择题(共8小题)1.关于x的分式方程=1的解为正数,则字母a的取值范围为()A.a≥﹣1B.a>﹣1C.a≤﹣1D.a<﹣12.已知x+y﹣3=0,则2y•2x的值是()A.6B.﹣6C.D.83.下列四个图形中,轴对称图形有()个.A.1B.2C.3D.44.如图,已知在△ABC中,CD是AB边上的高线,BE平分∠ABC,交CD于点E,BC=5,DE=2,则△BCE的面积等于()(4题)(5题)A.10B.7C.5D.45.如图,△ABC≌△AEF,AB=AE,∠B=∠E,则对于结论①AC=AF,②∠FAB=∠EAB,③EF=BC,④∠EAB=∠FAC,其中正确结论的个数是()A.1个B.2个C.3个D.4个6.已知一个多边形的内角和是900°,则这个多边形是()A.五边形B.六边形C.七边形D.八边形7.将一副直角三角尺如图放置,若∠AOD=20°,则∠BOC的大小为()A.140°B.160°C.170°D.150°8.如图,CE是△ABC的外角∠ACD的平分线,若∠B=35°,∠ACE=60°,则∠A=()A.35°B.95°C.85°D.75°二.填空题(共6小题)9.如图,点D在BC上,DE⊥AB于点E,DF⊥BC交AC于点F,BD=CF,BE=CD.若∠AFD=145°,则∠EDF=.10.将一副直角三角板如图放置,使含30°角的三角板的短直角边和含45°角的三角板的一条直角边重合,则∠1的度数为度.11.如图所示,在△ABC中,DM、EN分别垂直平分AB和AC,交BC于D、E,若∠DAE =50°,则∠BAC=度,若△ADE的周长为19cm,则BC=cm.12.若a m=6,a n=2,则a m+2n的值为.13.若x2+kxy+49y2是一个完全平方式,则k=.14.已知:,则=.三.解答题(共6小题)15.先化简(x+3﹣)÷,再从0≤x≤4中选一个适合的整数代入求值.16.计算:(﹣1)2018﹣(π﹣3.14)0+()﹣2.17.因式分解(1)﹣2a3+12a2﹣18a(2)9a2(x﹣y)+4b2(y﹣x)18.已知2a2+3a﹣6=0.求代数式3a(2a+1)﹣(2a+1)(2a﹣1)的值.19.如图,在△ABC中,AC<AB<BC.(1)已知线段AB的垂直平分线与BC边交于点P,连接AP,求证:∠APC=2∠B.(2)以点B为圆心,线段AB的长为半径画弧,与BC边交于点Q,连接AQ.若∠AQC =3∠B,求∠B的度数.20.如图,∠C=∠E,AC=AE,点D在BC边上,∠1=∠2,AC和DE相交于点O.求证:△ABC≌△ADE.2022-2023学年人教新版八年级(上)数学寒假作业(五)一.选择题(共8小题)1.若一个多边形的每个外角都是72°,则这个多边形是()A.四边形B.五边形C.六边形D.以上都有可能2.嘉嘉和淇淇到学校的直线距离分别是5km和3km,那么嘉嘉和淇淇的直线距离不可能是()A.1km B.3km C.6km D.8km3.若一个正多边形的各个内角都是140°,则这个正多边形是()A.正七边形B.正八边形C.正九边形D.正十边形4.下列各项长度的木棒首尾相接可以组成三角形的是()A.1,2,3B.3,4,6C.2,3,5D.2,2,55.下列长度(单位:厘米)的三条线段,能组成三角形的是()A.2,2,5B.4,3,8C.12,5,7D.3,4,56.下列各组数中,不可能成为一个三角形三边长的是()A.3,7,11B.5,5,7C.3,4,5D.6,7,12 7.如图,在△ABC中,D,E,F分别是边AB,AC,BC的中点,G为线段EC的中点,下列四条线段中,是△ABC的中线的是()A.线段DE B.线段BE C.线段EF D.线段FG8.如图,四根木条钉成一个四边形框架ABCD,要使框架稳固且不活动,至少还需要添加木条()A.1根B.2根C.3根D.4根二.填空题(共6小题)9.已知一个多边形的内角和加上一个外角共2050°,这个多边形是边形,这个外角的度数是.10.如图,在五边形ABCDE中,∠A=35°,去掉∠A后得到一个六边形BCDENM,则∠1+∠2的度数为.11.在△ABC中,∠A=30°,∠B=90°,则∠C=度.12.如图,在正六边形ABCDEF中,延长AB,DC交于点O,则∠AOD的度数为.13.已知一个正多边形的外角为20°,则这个多边形的边数为.14.如图,工人师傅在安装木制门框时,为防止变形常常钉上两根木条,这样做的依据是.三.解答题(共6小题)15.如图是一个凹多边形,∠A=90°,∠C=106°,∠D=116°,∠E=100°;求∠1+∠2的值.16.如图,AD、BE分别是△ABC的高和角平分线,∠BAC=86°,∠C=58°,求∠AOB 的大小.17.如图,DE⊥AC于E,BF⊥AC于F,∠1+∠2=180°,求证:∠AGF=∠ABC.18.如图,△ABC中,AD是高,AE,BF是角平分线,它们相交于点O,∠CAB=80°,∠C=60°,求∠DAE和∠BOA的度数.19.已知一个多边形的内角和比外角和多900°,并且这个多边形各个内角的度数都相等.这个多边形的每个内角是多少度?20.已知一个正多边形的内角和比外角和的3倍多180°,求这个正多边形的边数和每个内角的度数.。

人教版小学六年级数学上册寒假专题训练作业(每天一页)

人教版小学六年级数学上册寒假专题训练作业(每天一页)

小学数学(六年级上册)寒假作业(一)日期:一、填空1. xx年亚洲约有39亿人,比欧洲人口总数的5倍还多4亿人,欧洲大约有()亿人。

2. 苹果的单价是x元,梨的单价是苹果的2倍少0.5元,梨的单价是()元。

3. 每千克苹果a元,用10元钱买3千克苹果应找回()元。

4. 比x的3倍多16的数是()。

5. 买4个篮球,每个a元,5个足球,每个b元。

4a+5b表示()。

6. 三个连续的偶数,中间一个数是a,前边一个数是(),后边一个数是()。

7. 用两个棱长是1厘米的正方体拼成一个长方体,这个长方体的棱长之和是()厘米,表面积是()平方厘米,体积是()立方厘米。

8. 用长36厘米的铁丝围成一个正方体的框架,这个正方体的表面积是(),体积是()。

9. 7.8立方米=()立方分米2.8立方分米=()升=()毫升7.03升=()升()毫升6立方米30立方分米=()立方米10. 把一根1米长的木料,平均截成3段,表面积增加了12平方分米,原来这根木料的体积是()立方分米。

二、选择正确的答案填空。

1. 小红身高1.25米,小红比李明高b米,李明的身高是()米。

A. 1.25+bB. 1.25-bC. 1.25bD. 1.25÷b2. 下列各式中,是方程的有()。

A. 6x-2>15B. x+5=3xC. 3x-1.5xD. 2+3=53. 小明比小刚大,小明今年a岁,小刚今年b岁,3年后小明比小刚大()岁。

A. 3B. a-bC. a-b+3D. 3a-b4. 黑兔有x只,黑兔比白兔的3倍少5只,白兔()只。

A. (x-5)÷3B.3x-5C.(x+5)÷3D. 3x+55. 一个普通的酒瓶的容积大约是500()A. 毫升B. 升C. 立方米D. 立方分米6. 正方体的棱长扩大2倍,表面积扩大()倍,体积扩大()倍。

A. 2倍2倍B. 4倍4倍C. 4倍 8倍D. 2倍 4倍7. 下面第( )幅纸板能做成一个完整的正方体。

寒假作业(1) 语文九上部编版(字词类。有答案)

寒假作业(1) 语文九上部编版(字词类。有答案)

寒假作业(1)九年级语文部编版(字词类)1.下列选项中字形和加粗字读音全部正确的一项是()A.妖娆(ráo)黎明凝望(líng)哀愁B.摇曳(yè)风骚鲜妍(yán)海狭C.冠冕(guàn)篝火忧戚(qī)飘逸D.分外(fèn)辽阔枉然(wǎng)嘶哑2.下列词语中,字形和加粗字注音全都正确的一项是()A.禅师亵渎(xiè)段章取义游弋(gé)B.秘诀旁骛(wù)荡然无存惊骇(hài)C.绸缎瞥见(piē)矫揉造做箴言(jiān)D.广袤困厄(è)形消骨立濡养(xū)3.下列加粗字的读音完全正确的一项是()A.谪守(dí)诗赋(fù)衔远山(xián)迁客骚人(sāo)B.宫阙(què)毳衣(máo)低绮户(qǐ)樯倾楫摧(qiáng)C.颓然(tuí)喧哗(xuān)多歧路(qí)伛偻提携(lǒu)D.阴翳(yì)凄凉(qī)烂柯人(kē)琼楼玉宇(qióng)4.下列词语中字形和加粗字的注音完全正确的一项是()A.瘴江(zhàng)横无际崖长堤(tī)崇祯B.波澜(lán)浮光跃金凄凉(qī)沉舟C.喧哗(huá)觥筹交错济沧海(jǐ)苍颜D.戍鼓(shù)雾淞亢砀冰塞川(sè)皓月5.下列字形和加粗字注音全都正确的一项是()A.阴晦(huì)毡帽五行缺土(xíng)笑嘻嘻B.栈桥(jiàn)姿睢狼狈不堪(kān)油麻地C.褴褛(lǔ)糟踏浩浩荡荡(dàng)暴风雨D.阔绰(chāo)晀望无忧无虑(lǜ)大理石6.下列字形和加粗字读音没有错误的一项是()A.渺茫诓骗(kuāng)众叛亲离前仆后继(pū)B.辩别停滞(dài)轻而易举腐草为萤(fǔ)C.譬如对称(chèng)走头无路自暴自弃(bào)D.豢养遁词(dùn)画龙点晴锲而不舍(qì)7.下列各组词语中,加粗字的读音全都正确的一组是()A.楹联(yíng)追溯(shuò)簇新(cù)扣人心弦(xián)B.婆娑(suō)惩戒(chěng)戳穿(chuō)凛然生畏(lǐng)C.嗔怒(chēn)惬意(qiè)瑰宝(guī)孜孜不倦(zī)D.召唤(zhāo)山峦(luán)刹那(shà)侃侃而谈(kǎn)8.下列句中加粗词语使用有误的一项是()A.谷爱凌夺得2022年北京冬奥会自由式滑雪女子大跳台金牌,人们因此称她为滑雪运动的“一代天骄”。

寒假作业(1) 2022—2023学年部编版语文七年级上册(字词类。有答案)

寒假作业(1) 2022—2023学年部编版语文七年级上册(字词类。有答案)

寒假作业(1)——2022-2023学年七年级语文人教部编版1.下列加粗字的注音有误的一项是()A.花苞(bāo)娇媚(mèi)诱惑(huò)彩棱镜(lèng)B.睫毛(jié)掩饰(shì)高邈(miǎo)绿茵茵(yīn)C.莅临(lì)吝啬(lìn)干涩(sè)淅淅沥沥(xī)D.粗犷(guǎng)静谧(mì)晒干(shài)咄咄逼人(duō)2.下列词语中加粗字的注音有误的一项是()A.感慨(kǎi)走廊(láng)疲惫不堪(kān)B.搓捻(cuō)奥秘(mì)小心翼翼(yì)C.航行(xíng)模仿(mó)截然不同(jié)D.缝制(féng)绽开(dìng)恍然大悟(huǎng)3.下面语段中加粗字的读音完全正确的一项是()孩子的话像一泓清泉、一缕阳光,冲散了成人世界里由虚假造成的令人窒息的沉闷空气,又像是一柄利剑,刺穿了成人世界里的虚伪和怯懦。

孩子的话天真大胆,率直肯定,直言不讳。

孩子的心无所顾忌,无私无畏,纯真烂漫。

天真烂漫的童心与成人世界里的爱慕虚荣、阿谀逢迎、自私虚伪形成了鲜明的对照。

A.泓(hóng)缕(lǚ)散(sǎn)B.窒(zhì)闷(mēn)懦(nuò)C.讳(huì)忌(jì)漫(màn)D.慕(mù)谀(yú)鲜(xiǎn)4.下列词语书写完全正确的一项是()A.奥妙绽放浑为一谈B.懊悔愧疚花团锦簇C.探测慷概油然而生D.启示缓慢美不甚收5.下列词语书写有误的一项是()A.孵化姿势关键恋恋不舍B.例行出壳禁锢迫不急待C.屈膝尊严滑翔奇行异相D.翅膀柔软秃鹰怪诞不经6.下列字形和加粗字注音全部正确的一项是()A.派遣(qiǎn)医疗殖民地(zhí)冷冷清清B.鄙薄(bó)脱离拈轻怕重(zhān)共产主义C.纯粹(cuì)实贱晋察冀(jì)自私自利D.鄙视(bǐ)佣挤麻木不仁(má)帝国主义7.下列各句中,加粗字的注音和字形全都正确的一项是()A.凡是由人工孵卵器养出的小凫(fú),总是极其羞怯。

Unit 1 A new start寒假作业1-高一(新教材)英语必修一

Unit 1 A new start寒假作业1-高一(新教材)英语必修一

寒假作业(2019外研版必修一)Unit 1 A new start寒假作业(一)每日必背:Part 1重点单词1.senior adj. (地位、水平或级别)高的,高级的2.campus n. 校园3.engine n. 发动机,引擎4.insect n. 昆虫5.calm adj. 镇静的,沉着的6.author n. 作者;作家7.pressure n. 压力8.moment n. 某一时刻9.schedule n. 计划表,进度表,日程表10.volunteer n. 志愿者,义务工作者,自愿参加者11.band n. 乐队,乐团12.sharp adj. 敏锐的,聪明的13.topic n. 话题,论题14.dinosaur n. 恐龙15.dolphin n. 海豚16.badminton n. 羽毛球17.opportunity n. 机会,时机18.figure v. 认为,以为19.award n. 奖,奖赏20.select v. 选择,选拔21.specific adj. 具体的,特定的22.journal n. 日记,日志23.struggle v. 奋斗,拼搏24.exchange v. 意见、信息等的交流25.junior adj. 低年级的26.rate v t. 对……作评估,评价27.sight n. 看到,看见28.former adj. 从前的29.particular adj. 特定的,特指的30.view n. (一次)观看31.panic n. 惊恐,惊慌32.subscribe v. 订阅(报纸或杂志)33.facility n. 设施34.poster n. 海报35.piano n. 钢琴36.stage n. 舞台每日练习:Ⅰ.单句语法填空1.The ________ (amaze)look on the teacher's face suggested that he was satisfied with John's progress.2.Not ________(impress)with the quality of your goods,I will certainly not advise others to buy them.3.—Where does your little daughter want to go during her holiday?—She is always looking forward to ________(take)to Mount Huangshan.4.You should give clear ________ (instruct)for every step of theexperiment.5.In order to change attitudes ________ employing women,the government is bringing in new laws.6.The lecture was so ________(bore)that the students fell asleep.7.The computers in your office are more expensive than ________ in our school.8.The housing price is three times ________(high)than that of last year.Ⅱ.阅读理解First day at schoolIt was my first day at school in London and I was half-excited and half-frightened.On my way to school I wondered,what questions the other boys would ask me and practised all the answers,“I am nine years old.I was born here but I haven't lived here since I was two.I was living in Farley.It's about thirty miles away.I came back to London two months ago.” I also wondered if it was the rule for boys to fight strangers like me,but I was tall for my age.I hoped they would decide not to risk it.No one took any notice of me before school.I stood in the centre of the playground,expecting someone to say “Hello”,but no one spoke to me.My teacher was called Mr.Jones.There were 42 boys in the class,so I_didn't_stand_out there,either,until the first lesson of the afternoon.Mr.Jones was very fond of Charles Dickens,so he asked several boys if they knew Dickens' birthplace,but no one guessed right.A boy called Brian,the biggest in the class,said,“Timbuktu”,and Mr.Jones went red in the face.Then he asked me.I said,“Portsmouth”,and everyone stared at me because Mr.Jones said I was right.This didn't make me very popular,of course.“He thinks he's clever,” I heard Brian say.After that,we went out to the playground to play football.I was in Brian'steam,and he obviously had Dickens in mind because he told me to go in goal.No one ever wanted to be the goalkeeper.“He's big enough and useless enough,” Brian said when someone asked him why he had chosen me.As the boy kicked the ball hard along the ground to my right,I threw myself down quickly and saved it.All my team crowded round me.My bare knees were grazed and bleeding.Brian took out a handkerchief and offered it to me.“Do you want to join my gang (team)?” he said.At the end of the day,I was no longer a stranger.1.The writer prepared to answer all of the following questions EXCEPT “ ________”.A.How old are you?B.Where are you from?C.Do you want to join my gang?D.When did you come back to London?2.We can learn from the passage that ________.A.boys were usually unfriendly to new studentsB.the writer was not greeted as he expectedC.Brian praised the writer for his clevernessD.the writer was glad to be a goalkeeper3.The underlined part “I didn't stand out” in Paragraph 3 means that the writer was not ________.A.reliable B.nervousC.important D.noticeable4.The writer was offered a handkerchief because ________.A.he was in Brian's teamB.he was no longer a new comerC.he was beginning to be acceptedD.he pushed a player in the other teamⅢ.完形填空High school seems bigger.There are __1__ kids and it's a totally new environment.It could be a __2__ time for new students,__3__,in fact,it isn't really that bad.The first day of course is always terrifying,but,then again,the first day of middle school was probably the __4__.Of course you might get lost during the first few days __5__ your classes,but after a while what seems like a large school really isn't.One thing that's really cool about high school is that there are many more classes that you can __6__.For example,if you like __7__,there are many art classes.At the same time,there are __8__ classes,which you can't take in middle school __9__ photography and psychology(心理学).There are many new things in high school that make it much more __10__.In high school,you're able to join more clubs,play more sports,and take part in more __11__,and at the same time make new friends with kids with the same __12__ as you.Also,these activities can give you a __13__ to learn something that you might not have had the opportunity to learn in __14__.High school is different __15__ everyone,but there's one thing that's __16__.You're going to have just as much fun here as you __17__ before.But having fun isn't enough! You're __18__ so you have to be more responsible.Everything changes when you get __19__,but the changes aren't that bad.You __20__ worry too much about growing up.1.A.less B.fewC.more D.many 2.A.terrible B.popular C.good D.worried 3.A.but B.and C.while D.or4.A.different B.same C.rich D.difficult 5.A.attending to B.looking for C.finding out D.knowing of 6.A.take B.join C.give D.learn 7.A.dancing B.sports C.art D.singing 8.A.other B.another C.others D.the other 9.A.without B.like C.except D.as10.A.fun B.boring C.busy D.tiring 11.A.activities B.classes C.lectures D.groups 12.A.customs B.classes C.ages D.interests 13.A.chance B.time C.place D.space 14.A.your home B.middle schoolC.society D.primary school15.A.in B.fromC.on D.for16.A.sure B.certainC.doubtful D.believable17.A.did B.createdC.remembered D.made18.A.taking classes B.growing upC.joining clubs D.making friends19.A.older B.clevererC.taller D.wiser20.A.can't B.mustn'tC.shouldn't D.won'tⅣ.短文改错假定英语课上老师要求同桌之间交换修改作文,请你修改你同桌写的以下作文。

寒假作业1

寒假作业1

解三角形4. (P1)在△ABC 中,已知角A ,B ,C 的对边分别为a ,b ,c ,且bcosB +ccosC =acosA ,则△ABC 是.( )A.等腰三角形B.等边三角形C.直角三角形D.等腰直角三角形 4.答案:C 解析:∵ bcosB +ccosC =acosA ,由正弦定理得:sinBcosB +sinCcosC =sinAcosA , 即sin2B +sin2C =2sinAcosA ,∴2sin(B +C)cos(B -C)=2sinAcosA .∵A +B +C =π, ∴sin(B +C)=sinA .而sinA ≠0,∴cos(B -C)=cosA ,即cos(B -C)+cos(B +C)=0, ∴2cosBcosC =0.∵ 0<B <π,0<C <π,∴B =2π或C =2π,即△ABC 是直角三角形. 14.(P2).如图,货轮在海上以35n mile/h 的速度沿方位角(从正北方向顺时针转到目标方向线的水平角)为152o 的方向航行.为了确定船位,在B 点处观测到灯塔A 的方位角为122o .半小时后,货轮到达C 点处,观测到灯塔A 的方位角为32o . 则此时货轮与灯塔之间的距离是 mile .14.答案:船与灯塔间的距离为435n mile . 解析:在△ABC 中,∠B =152o-122o =30o ,∠C =180o -152o +32o =60o ,∠A =180o -30o-60o =90o ,BC =235,∴AC =235sin30o =435.15. (P2)在ABC ∆中,a 、b 、c 分别是角A 、B 、C 对边的长,且满足ca bC B +-=2cos cos 。

(1)求角B 的值;(2)若5,19=+=c a b ,求ABC ∆的面积。

解析: (1)由正弦定理有:C R c B R b A R a R C cB b A a s i n 2,s i n 2,s i n 22s i n s i n s i n ===⇒===, 代入c a bC B +-=2cos cos ,得CA B C B sin sin 2sin cos cos +-=, 即 0)sin(cos sin 2,0cos sin cos sin cos sin 2=++=++B C B A C B B C B A , 在ABC ∆中,有π=++C B A ,即)sin(sin C B A +=,.3221cos ,0sin ,0sin cos sin 2π=⇒-=∴≠=+∴B B A A B A(2)由余弦定理有:)cos 1(2)(cos 22222B ac c a B ac c a b +-+=-+=,A,6)211(25192=⇒--=ac acA B C ∆∴的面积.32323621sin 21=⨯⨯==B ac S数列(一)(P5)2.在等差数列{a n }中,已知a 4+a 8=16,则该数列前11项和S 11=( )A .58B .88C .143D .176 【答案】B【解析】在等差数列中,111111481111()16,882a a a a a a s ⨯++=+=∴== ,答案为B(P5)3在等差数列{}n a 中,3737a a +=,则2468a a a a +++= .3.74解析28463737a a a a a a +=+=+=,故246823774a a a a +++=⨯= (P6)7.等比数列{a n }中,a 2=9,a 5=243,则{a n }的前4项和为( ).A .81B .120C .168D .192 7.B 解析:∵a 2=9,a 5=243,25a a =q 3=9243=27, ∴q =3,a 1q =9,a 1=3, ∴S 4=3-13-35=2240=120(P6)14.满足*12121,log log 1()n n a a a n +==+∈N ,它的前n 项和为n S ,则满足1025n S >的最小n 值是14.11解析:因为*12121,log log 1()n n a a a n +==+∈N ,所以n n a a 21=+,12-=n n a ,12-=n n S ,则满足1025n S >的最小n 值是11;15.(P6)已知数列}{n a 中,*)(022,81241N n a a a a a n n n ∈=+-==++且满足 (1)求数列}{n a 的通项公式;(2)设n n n S a a a S 求|,|||||21+++= (3)设*).(,)12(121N n b b b T a n b n n n n ∈+++=-=是否存在最大的整数m ,使得对任意*N n ∈,均有32mT n >成立?若存在,求出m ,若不存在,请说明理由。

寒假作业(1)Welcome Unit -2021-2022学年高一英语人教版(2019)必修第一册

寒假作业(1)Welcome Unit -2021-2022学年高一英语人教版(2019)必修第一册

(1)Welcome Unit——2021-2022学年高一英语人教版(2019)寒假作业一、阅读理解1. I work with V olunteers for Wildlife, a rescue and education organization at Bailey Arboretum in Locust Valley.Trying to help injured, displaced or sick creatures can be heart breaking; survival is never certain. However, when it works, it is simply beautiful.I got a rescue call from a woman in Muttontown. She had found a young owl (猫头鹰) on the ground. When I arrived, I saw a 2-to 3-week-old owl. It had already been placed in a carrier for safety.I examined the chick (雏鸟) and it seemed fine. If I could locate the nest, I might have been able to put it back, but noluck. My next work was to construct a nest and anchor it in a tree.The homeowner was very helpful. A wire basket was found. I put some pine branches into the basket to make this nest safe and comfortable. I placed the chick in the nest, and it quickly calmed down.Now all that was needed were the parents, but they were absent. I gave the homeowner a recording of the hunger scre ams of owl chicks. These advertise the presence of chicks to adults; they might also encourage our chick to start calling as well. I gave the owner as much information as possible and headed home to see what news the night might bring.A nervous night to be sure, but sometimes the spirits of nature s mile on us all! The homeowner called to say that the parents had responded to the recordings. I drove over and saw the chick in the nest looking healthy and active. And it was accompanied in the nest by the greatest sight of all-LUNCH! The parents had done their duty and would probably continue to do so.1. What is unavoidable in the author's rescue work according to paragraph 1?A. Efforts made in vain.B. Getting injured in his work.C. Feeling uncertain about his future.D. Creatures forced out of their homes.2.Why was the author called to Muttontown?A. To rescue a woman.B. To take care of a woman.C. To look at a baby owl.D. To cure a young owl.3.What made the chick calm down?A. A new nest.B. Some food.C. A recording.D. Its parents.4.How would the author feel about the outcome of the event?A. It's unexpected.B. It's beautiful.C. It's humorous.D. It's discouraging.keway Middle School NowHas Its Own School Store!The Lion's DenStop by the Lion's Den before or after school or during lunch to check out the various goods available at our new school store. Here you can find school supplies, gym uniforms and gifts. Choir (合唱团) students manage the store and are ready to serve you. Money raised from sales will help purchase new music, costumes, and sound equipment for the choir.Everything you need for school is available at the Lion's Den. Come in today to see for yourself!Location : Room 2258, next to the dining hallHours: Monday—Friday7:30—8:00 AM, 11: 30 AM—1:30 PM,and 3:30 PM—4: 15 PMUsed Book DonationsDonations of used books are welcome and rewarded. Drop off your used book for donations in the store. For every five books donated, you can receive a Lions Reward Coin for 25 cents off your next purchase at the Lion's Den.Save and WinBring the following coupons (优惠券) when you visit the Lion's Den. You can save 20% off your first purchase, receive a free pen or pencil, and enter your name and grade in a drawing to win a T-shirt. Scan the QR code, and you can get more discount information.1.The Lion's Den raises money to _____.A. buy booksB. help school choirC. support the poorD. build a new school2. If you donate five used books,you can get _____.A. a Lions Reward CoinB. 20% offC. more discount informationD. a free pencil or pen3.Your personal information is needed to _____.A. get the membershipB. join the school choirC. win a T-shirtD. scan the QR code4.We can probably read this passage from _____.A. a textbookB. a travel guideC. a science magazineD. a school website3. My name is Chelsea Chowderhead. A chowder is a kind of soup. I was laughed at because of my last name as soon as I started school. So when my family moved to South Carolina, I asked my dad if I could change my name."You shouldn't change who you are. Let people get to know you first and your name later. When you meet someone new, ask them a good question, something you're really interested in. Once people start talking about themselves, they don't judge (评价) you."Two days later I headed to my new school for the first day of class. At lunch, I noticed that there were twin brothers who were talking to each other. I remembered my dad's advice, so I decided to try.I noticed that their lunch boxes were identical. "What's it like being a twin?" I asked.They looked surprised. Then one said, "No one has ever asked us that!""Most of the time it's good," the other said. "When you're a twin you always have someone totalk to and have lunch with."In no time we were laughing and talking. Then one of the brothers said, "I'm Nicholas, and this is my brother, Nathaniel. What's your name?"I took a deep breath and said, "I'm Chelsea Chowderhead.""Chowder? Like the soup?" asked Nathaniel."Yes," I replied, looking down."Hey, cool! Do you want to come over after school and play basketball with us?" Nathaniel asked. I nodded.And that is how I became friends with the twin brothers.1. Why did the writer want to change his name?A. People made fun of it.B. He wanted to make more friends.C. It was hard to remember.D. He wanted to be cool in the new school.2. The writer's father advised him to _______.A. move to a new classB. say hello to othersC. share his interestsD. ask good questions3. The underlined word "identical" in Paragraph 4 probably means "_______".A. sameB. beautifulC. bigD. full4. When the twin brothers asked his name, the writer felt _______.A. surprisedB. angryC. nervousD. proud4. Afternoon tea became popular about 150 years ago, when rich ladies invited their friends totheir houses for a cup of afternoon tea. Usually taken in the late afternoon, it is also called "low tea" as it is served a t a low table. Since this isn't a meal, but rather like a late afternoon snack, finger foods such as sandwiches, scones and pastries are common. People are taking tea not only to get what their bodies need or satisfy hunger, but to take time to relax, chat and enjoy the company of dear friends. In England, the traditional time for tea is four or five o'clock in the afternoon and no one stays after seven o'clock.This very British tradition is said to have been started in the 1840s by Duchess Anna Maria, wife of the 7th Duke of Bedford, England. During the long time between an early lunch and a very late dinner, she experienced what she called "a sinking feeling" at about 4 or 5 in the afternoon. So she asked her serving girl to bring her a pot of tea, a little bread and butter and cake in her room. She found this arrangement (安排) so pleasing that she began asking her friends to join her.High tea, a term often mixed with afternoon tea, usually takes the place of supper. In the past the British working population did not have afternoon tea. They had meals at about noon and after work between five and seven o'clock. The table would be set with dinner foods like meat, bread, butter, potatoes, cheese and of course tea. It was called M high tea" because it was eaten at a high dining table rather than a low tea table.How much do people enjoy the afternoon tea moment? As a famous writer named Henry James said, "There are few hours in life more agreeable than the hour dedicated (把......专用于) to the ceremony known as afternoon tea."1. How does the term "low tea" come about?A. The tea is served in the late afternoon.B. The tea is provided to treat friends.C. The tea is drunk at a low table.D. The tea is enjoyed to relax.2. Who started the tradition of afternoon tea?A. Duchess Anna Maria.B. The 7th Duke of Bedford.C. Henry James.D. Some unknown working people.3. What does the underlined phrase "a sinking feeling" refer to?A. A feeling of being annoyed.B. A feeling of hunger.C. A feeling of missing friends.D. A feeling of shyness.4. Why does the author mention Henry James' words?A. To show the difference between afternoon tea and high tea.B. To tell us that afternoon tea is in fact a ceremony.C. To tell us how the name "afternoon tea" comes out.D. To show how popular afternoon tea is among people.二、七选五5.Ways to Create Calm in Your Daily LifeMost of us need some space for calm in our life. A few simple minutes can create much needed moments of calm. ①_________ You can use these skills to create calm in your busy schedule.Go walking. Walking is perfect and you can do it well anywhere. Simply walking and taking in the view can reduce stress. ②_________ It makes room for new ideas to take root.Appreciate nature. When we think of nature, we think of getting out into the open air, and that's great if you can. ③_________ Actually, nature is everywhere. Find a park or a patch(一小块地) of the green, or just stick your head out of the window! You have many ways to appreciate nature.Listen to music. Many people listen to music to calm themselves down. Music actually lifts us out of ourselves. Discover what music works for you. ④_________Do some activities. Certain activities like yoga and tai chi need quiet focus. ⑤_________ They are good for the body, mind and spirit. Classes are a good place to begin, but once you learn the skills, you can practice anywhere; home, school or even on the road.Try out some of these ways and you'll soon be practicing "moments of calm".A. But what if you are in the city?B. Notice the animals around you.C. They are perfect for calming.D. Music is a way to express the way that they are feeling.E. It's time to get stressful thoughts out of your head.F. With enj oyable music even work can be "music to your ears".G. You don't have to find a mountain to sit on, or empty your mind of all thoughts for hours.三、完形填空6. Molai grew up in a tiny village in India. The village lay near some wetlands which became his second 1 . He learned the value and beauty of 2 there from a very young age.When he was 16, Molai began to notice something 3 happening around his home.A flood had hit the area earlier that year and the 4 it caused had driven away a number of birds. 5 , the number of snakes had declined as well. He 6 that it was because there weren't enough trees to protect them from the 7 . The solution, of course, was to plant trees so the animals could seek 8 during the daytime. He turned to the 9 department for help but was told that nothing would grow there. However, Molai went looking on his own and 10 a nearby island where he began to plant trees.11 young plants in the dry season was 12 for a lone boy. Molai built at the 13 of each sapling(幼树) a bamboo platform, where he placed earthen pots with small holes to 14 rainwater. The water would then (滴落) on the plants below.Molai 15 to plant trees for the next 37 years. His efforts have resulted in 1,360 acres of naturally-grown land that has become home to many plants and animals.1.A.dream B. job C. home D. choice2.A. nature B. youth C. culture D. knowledge3.A. precious B. interesting C. disturbing D. awkward4.A. waste B. tension C. pain D. damage5.A. Besides B. However C. Therefore D. Otherwise6.A. agreed B. realized C. remembered D. predicted7.A. noise B. heat C. disease D. dust8.A. directions B. partners C. help D. shelter9.A. labor B. police C. forest D. finance10.A. rebuilt B. discovered C. left D. managed11.A. Decorating B. Observing C. Watering D. Guarding12.A. tough B. illegal C. fantastic D. beneficial13.A. back B. top C. foot D. side14.A. cool down B. keep off C. purify D. collect15.A. returned B. learned C. failed D. continued四、语法填空7. When I packed up my life and moved from the comforts of my little hometown to Waco, I remember feeling ① _____ (lose). All my friends were so excited to start their own lives, but I just wasn't sure ②_____ I was ready for that yet. Many things frightened me. But I hid my fears and when the time ③_____ (final) came, I hugged my mother goodbye, made the two-hour one-way drive from Coppel to Waco, and set up my new room.For the first few weeks, I didn't miss home or really feel any kind of emotion at all except tired. There was so much for me to learn ④_____ I hadn't had time to think about anything. My energy ⑤_____ (direct) towards figuring out campus, adjusting to college-level classes and remembering the names of every new person I met. I explored every corner, ⑥_____ (look) for the perfect place to study. I learned to set ⑦_____ (I) a schedule of getting groceries, cleaning my room and doing my laundry on Sundays.Nowadays, in my second semester, I feel like I have almost adapted ⑧_____ the university life. The transition from high school to college wasn't ⑨_____ difficult as my mind made me think it would be. One of the best ⑩_____ (thing) college has taught me is how to be independent.五、写作8.假定你是李华,暑期在伦敦学习,得知当地美术馆要举办中国画展览。

谊华实验学校地理寒假作业(一)

谊华实验学校地理寒假作业(一)

谊华实验学校地理寒假作业(一)满分:100分时间:90分钟一、选择题(本大题共15小题,每小题3分,共45分。

在每题所列出的四个选项中,只有一项是最符合题目要求的。

)2021年2月9日,经过约7个月、近5亿千米的“太空旅行”,阿拉伯联合酋长国首个火星探测器“希望"号成功进入火星轨道,开始对火星大气层进行监测和研究。

据此完成下面小题。

1.“希望”号近5亿千米的“太空旅行”途中,涉及的天体系统不包括()A.地月系B.太阳系C.银河系D.河外星系2.与火星相比,地球存在高级智慧生命的主要原因是()A.宇宙环境安全B.太阳光照稳定C.表层充沛的液态水D.昼夜温差大3.“希望”号在飞向火星的过程中,要特别关注“空间天气”。

这里的“空间天气”主要是指()A.台风、寒潮B.太阳活动C.小行星的撞击D.人造卫星的干扰2021年9月17日,“神舟十二号”飞船乘载着三名航天员从400km左右的太空轨道进入大气层、当到达距地面10kn高度的地方打开降落伞,在内蒙古自治区东风着陆场安全返回地球家园。

据此完成下列各题。

4.)A.电离层B.臭氧层C.对流层D.平流层5.当“神舟十二号”飞船穿越平流层时()A.天气现象复杂多变B.能见度高C.气流垂直运动显著D.氧气稠密丹霞地貌,指红色砂、砾岩经长期风化剥离和流水侵蚀形成的各种地貌的总称。

雅丹地貌是在极干旱地区一些干涸的湖底,主要在定向风吹蚀作用下,形成彼此相间排列的垄岗、堡丘、土柱(墩)、凹地等景观组合。

左图为“我国著名的丹霞、雅丹地貌分布图”。

右图为“我国某地雅丹地貌景观图”。

读图,完成下面小题。

6.如左图所示我国雅丹地貌、丹霞地貌的主要分布地区是()A.东北地区、东部季风区B.西南地区、西北地区C.西北地区、东部季风区D.青藏地区、东部季风区7.形成雅丹地貌、丹霞地貌的主要外力作用分别是()A.海蚀作用、风蚀作用B.风蚀作用、流水作用C.冰蚀作用、流水作用D.流水作用、风化作用8.右图中的雅丹地貌,垄槽相间、平行排列且高程相近,该地貌特征形成原因的分析不合理的是()A.湖底平坦开阔,因干涸裂开,风沿着这些裂隙吹蚀,裂隙的泥土被侵蚀B.风向与裂隙方向一致,加强了风力的吹蚀C.外力作用以风力侵蚀为主D.湖底因干涸裂开,在流水侵蚀作用下裂隙的泥土被侵蚀土壤的形成受到多种因素的影响。

一年级寒假作业一日清单(1)

一年级寒假作业一日清单(1)
劳动
饭前摆放餐具,学习拖地
1.21
语文
1.悦读书籍30分钟,适当阅读积累。(根据推荐书目选择其一阅读)
2.静心书法:①温故(整体认读音节表)
3.背诵古诗《绝句(迟日江山丽)》
学习评价:认真阅读 ☆ ☆ ☆ 书写美观 ☆ ☆ ☆ 熟读成诵 ☆ ☆ ☆
数学
1.每日口算5分钟。(20以内的加减法)
2.认识人民币(纸币)
劳动
饭前摆放餐具,学习拖地
1.20
语文
1.悦读书籍30分钟,适当阅读积累。(根据推荐书目选择其一阅读)
2.静心书法:①温故(韵母表)
3.背诵古诗《晓出净慈寺送林子方》
学习评价:认真阅读 ☆ ☆ ☆ 书写美观 ☆ ☆ ☆ 熟读成诵 ☆ ☆ ☆
数学
1.每日口算5分钟。(20以内的加减法)
2.制定今日学习计划(采用整时表示)
4.30s折返跑/3组5.坐位体前屈、横叉、竖叉
美术
通过绘画的形式来表现红色电影里的英雄人物或者中心事件,要求用4K素描纸。
劳动
饭前摆放餐具,学会安全开关灯
寒假作业一日清单
1.24
语文
1.悦读书籍30分钟,适当阅读积累。(根据推荐书目选择其一阅读)
2.静心书写:①温故(一上P119常用笔画)
3.背诵古诗《鹿柴》
3.读课本33页内容
学习评价:每日口算☆ ☆ ☆ 认识钱币 ☆ ☆ ☆ 我会读书 ☆ ☆ ☆
音乐
演唱红色歌曲《红Biblioteka 歌》体育1.一分钟跳绳/3组(个数) 2.200个跳绳(时间) 3.开合跳100/3组
4.30s折返跑/3组5.坐位体前屈、横叉、竖叉
劳动
饭前摆放餐具,学会安全开关灯
1.22

六年级寒假作业(解决问题)(1)

六年级寒假作业(解决问题)(1)

解决问题(整数部分和小数部分)1.一个工程队铺一段公路,每天上午工作4.5小时,下午工作3.5小时。

如果按每小时铺路48米计算,这个工程队一天共铺路多少米?2.东关小学体育队有71人,其中15人是篮球队员,田径队员的人数是篮球队员的2.4倍,其余的是足球队员。

足球队有多少人?3.一个服装厂计划做660套衣服,已经做了5天,平均每天做75套。

剩下的要3天完成,平均每天要做多少套?4.同学们抬水浇树。

三年级浇45棵,四年级比三年级多浇10棵,五年级浇的棵数等于四年级的2倍。

五年级比三年级多浇树多棵?5.某公司要生产手机54万部,前10天平均每天生产1.5万部,剩下的要在20天完成,平均每天要制造多少万部?6.小玲看一本290页的故事书,前4天每天看20页。

以后每天看30页,再用几天可以看完?7.一个装订小组要装订2640本书,3小时装订了240本。

照这样计算,剩下的书还要多少小时才能装订完?8.学校食堂运来1吨煤,计划烧40天。

由于改进炉灶,每天节省5千克,这批煤可以烧多少天?第1页9.四年级一班和二班共有62名同学做纸花。

一班做了300朵,二班做的比一班少42朵。

平均每人做多少朵?10.学校食堂运来1吨煤,计划烧40天。

改进炉灶后,这批煤比原计划多烧10天,每天实际烧煤多少千克?11.红星小学计划20天收集树种120千克。

实际每天比原计划多收集2千克,收集这批树种实际用了多少天?12.食堂买来280千克大米,计划吃7天。

实际每天比原计划少吃5千克,这批大米实际吃了多少天?13.甲乙两地相距300千米。

一辆卡车从甲地到乙地计划行6小时。

实际每小时比原计划多行10千米,实际几小时到达?14.装订小组计划装订一批书。

每小时装订180本,10小时可以装订完。

如果每小时比原计划多装订20本,几小时可以装订完?15.一个生产小组要加工一批汽车配件。

原计划每天加工200个,15天完成任务。

实际每天加工了250个。

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1.1课题:宇宙中的地球
学习目标:
1、用图示说明宇宙中天体系统的层次,知道地球在宇宙中的位置
2、能运用课本的图表资料说明地球是一颗普通的行星(难点)
3、能解释地球的特殊性,出现生命的原因(重点)
目标一:地球在宇宙中的位置
1、宇宙中的天体有那些?其中最基本的天体是什么?
2、天体不能单独存在,总是和其他的天体相互吸引、相互绕转,形成天体系统的。

在课本上找出不同的天体系统,用图示表现出他们的层次。

目标二:太阳系中的一颗普通行星
1、太阳系中有八颗行星按照他们与太阳的距离由近及远,依次写出,着重关注(地球、小行星带的位置)
2、读表1.1和图1.5,通过数据区说明地球的普通性。

目标三:存在生命的行星
1、地球是这八颗行星中唯一一颗适合生物生存和繁衍的行星,在课本中找出出现生命的原因?(外部原因、内部原因)
一、单项选择题
1.晴朗的夜晚,我们用肉眼观察下列各种天体的感觉,叙述正确的是()
①星光闪烁的恒星②在星空中有明显移动的行星③一闪即逝的彗星④轮廓模糊的流星
A.①②
B.②③
C.③④
D.①④
2.在各种天体系统中银河系是()
①最高一级天体系统②与河外星系是同一级别的天体系统
③比太阳系低一级的天体系统④比地月系高两级的天体系统
A.①②
B.②④
C.③④
D.①③
3.下列关于太阳系的说法,合理的是()
A.太阳系属于宇宙中最低一级的天体系统
B.太阳系中九大行星的质量占整个太阳系的99.86%
C.太阳系包含两级天体系统
D.地月系是包含在太阳系中的唯一天体系统
根据你对太阳系中九大行星、小行星及其他天体的认识,完成4—7题。

4.九大行星中卫星最多的是()
A.地球
B.水星
C.木星
D.土星
5.下列选项列出的行星,属于巨行星的是()
A.木星
B.金星
C.地球
D.天王星
6.下列哪一类天体与著名的“狮子座”流星雨有着密切的关系()
A.小行星
B.星际物质
C.彗星
D.九大行星
7.太阳系中的小行星带位于下列哪两颗行星的轨道之间()
A.金星和地球
B.水星和金星
C.地球和火星
D.木星和火星
8.液态水的存在是地球生命起源和发展的重要条件之一,下列叙述中与地球“液态水”存在有密切关系的是()
①地球的质量和体积适中②地球上的昼夜更替周期适中
③地球上的气温适中④地球与太阳的距离适中
A.①④
B.②③④
C.③④
D.②③
9.地球处于一种安全的宇宙环境之中,指的是()
①太阳非常稳定②九大行星公转轨道几乎处在同一个平面上③九大行星的公转方向、绕日
轨道一致④小行星的公转方向、绕日轨道与九大行星保持一致
A.①②③
B.②③④
C.①②③④
D.①③④阅读材料一和材料二,完成10—12题。

材料一:1999年8月18日天空出现了罕见的天象,太阳、月亮及太阳系除地球外的八大行星相对于地球在相互垂直的两条直线上,构成“十字连星”状。

材料二:“恐怖大十字”邪说创始人日本的五岛勉宣布:大十字图案是最凶的预兆,届时“恐怖大十字”将从天而降,地球将发生大地震、火山大爆发、海水被煮沸、大气中充满有
毒烟雾,等等,人们将遭受一场毁灭性的劫难。

10.图中的所有天体均属于()
A.太阳系
B.地月系
C.河外星系
D.太阳系中的小行星带
11.图中天体D、F分别是()
A.火星、土星
B.土星、天王星
C.天王星、冥王星
D.冥王星、海王星
12.将下列事物的代号,根据其内在因果联系,填入下面的方框中。

A.适合生物呼吸的大气
B.日地距离适中
C.地球处在比较稳定的宇宙环境之中
D.自转和公转周期适中
E.地球处于比较安全的宇宙环境之中
F.积和质量适中
G.适宜的温度
H.地球表面温度的日变化和季节变化幅度不太大。

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