2020年八年级上第一次月考试卷(无答案)
一． 八年级月考数学试题（..9）
二． 填空（每空２分，共３0分）
1. 若函数 y = 3 x
m
是正比例函数，则m = ____
2. 一辆汽车的油箱中现有油40升，若不再加油，那么油箱中的油量y （单位：升）随行驶里程x 的增加而减少。
平均耗油量为0.1升/公里。
① y 与x 的函数关系式为＿＿ ；②自变量的取值范围是＿＿；③若行驶 100公里 ，则油箱里还有油＿＿＿升。
3. 直线y = x – 2 经过第____象限，y 随x 的增大而____；直线y = 2 –x 经过第____象限，y 随x 的减小而____。
4. 直线y = 2 x + 5 与x 轴交点坐标为_____，与y 轴交点坐标为_____.
5. 某种国库券的年利率是9.18%，则存满3年的本息和y 与本金x 之间的函数关系式为_____.
6. 为庆祝建国五十六周年，学校组织合唱汇演，七年级学生排练队形，一共10排，第一排20人，后面每排比前排多1人，则每排的人数m 与这排的排数n 之间的函数关系式为＿＿， 自变量的取值范围是＿＿＿＿。
7. 点P （m ，4）在直线y = 2 x – 4 上，则直线y = m ｘ－８经过第＿＿＿＿象限。
8. 函数ｙ＝３－ｘ与函数ｙ＝２ｘ＋６的图像的公共点坐标是＿＿＿。
二．选择（每题3分，共30分）
1. 一个圆柱体水桶装满水，水在桶底的小孔漏出，则桶底到水面的高度h 与时间t 的函数关系可以用哪个图像表达？（）
D
C B A
2.下列图像中有（）个表示y 是x 的函数。
A 、1 B 、 2 C 、3 D 、4
o
y
x
o
y
x
o
y
x
x
y
o
3. 一次函数 y = - 6x + 5 是由正比例函数y = - 6x 如何平移得到的？
A 、向上平移5个单位；
B 、向下平移5个单位；
C 、向左平移5个单位；
D 、向右平移5个单位 4.下列各点中，（）点不在函数y = x – 3的图像上 A 、（0，-3）； B 、（2，6）； C 、（5，2）； D 、（-1，-4）；
５．编织一付手套收入３元，则收入ｙ（元）与加工件数ｘ（付）之间的函数关系式为（）Ａ、ｙ＝ｘ＋３； Ｂ、ｙ＝ｘ－３；Ｃ、ｙ＝３ｘ Ｄ、ｙ＝３－ｘ
６．当ｘ＝３时，函数ｙ＝ｔｘ－１和函数ｙ＝ｘ＋ｔ的值相等，则ｔ＝（）Ａ、１；Ｂ、２；Ｃ、３Ｄ、４
７.小明有10元钱用于买2元钱一支的中性笔，买笔钱数S（元）与所买笔支数n 的函数图像为（）
D
C
B
A
８．已知一次函数ｙ＝３ｘ＋１中，自变量的取值范围是－１＜ｘ＜２则相应的函数的取值范围是（）Ａ－２＜y≤７Ｂ－２≤y ＜７Ｃ－２≤ｙ≤７Ｄ以上都不对
９．如图，ＯＡ、ＢＡ分别表示甲乙两
名同学运动的图像，图中ｓ和ｔ分别表示
运动路程和时间，根据图像判断（）
Ａ、甲比乙快Ｂ、乙比甲快
Ｃ、一样快Ｄ、无法确定
１０．若直线ｙ＝３ｘ＋ｂ与坐标轴所围成的三角形面积是６个面积单位，则ｂ为（）A 、６ B、－６ C 、±６ D 、±３
三、解答题（每题5分，共20分）
１．根据下列条件分别确定函数ｙ＝ｋｘ＋ｂ的解析式
⑴ｙ与ｘ成正比例，ｘ＝６时ｙ＝８；
⑵直线ｙ＝ｋｘ＋ｂ经过点（１，２）、（５，１５）
ｘ＋ｙ＝４
２．利用函数图像解方程组
ｘ－ｙ＝－２
3.利用函数图像的方法解不等式6ｘ＋３＜ｘ＋１３
四、解答题
小明从家出发，用20分钟跑步到离家2.5公里的游泳馆。
在游泳馆游泳60分钟后，从游泳馆出发，步行20分钟去距游泳馆1公里、距家1.5公里的书店买书。
20分钟后，离开书店散步回家，40分钟到家。
若规定小明家为坐标原点，请你画出小明从离开家到回到家的距离ｓ（公里）随着时间ｔ（分）的变化图像。
求下列各路段的距离ｓ（公里）关于时间ｔ（分）的函数关系式。
⑴从家到游泳馆；⑵从游泳馆到书店；⑶从书店回到家（每问5分，画图3分，共18分）
八年级月考数学答题卡（2005.10.9）
（只交答题卡，不交试题卷）
满分１２０分，时间９０分钟
一、填空
１．＿＿＿＿２．＿＿＿＿；＿＿＿＿；＿＿＿＿３．＿＿＿＿；＿＿＿＿；＿＿＿＿；＿＿＿＿４．＿＿＿＿；＿＿＿＿５．＿＿＿＿６．＿＿＿＿；＿＿＿＿７．＿＿＿＿８．＿＿＿＿
1、⑴⑵
2 、
3 、
四、解答题 1.
（1）
（2）
（3）
2.点燃蜡烛，蜡烛长度按照与时间成正比例缩短，长为21cm的蜡烛，已知点燃6分钟后，蜡烛缩短
3.6cm，设蜡烛点燃x分钟后缩短y cm,求：（1）用x 表示y的解析式
（2）自变量x的取值范围（3）此蜡烛几分钟燃烧完？
3.2003年夏天，湖南省由于持续高温和连日无雨，
水库蓄水量普遍下降。
右图是某水库的蓄水量V(万
立方米)与干旱持续时间t（天）之间的关系。
请回
答下列问题：（1）该水库原蓄水量为多少？持续干
旱10天后，水库蓄水量为多少？
（2）若水库的蓄水量小于400万立方米时，将发出严重干旱警报。
请问：持续干旱多少天，将发出严重干旱警报？（3）按此规律，持续干旱多少天时，水库将干涸？
五、解答题1.A城有肥料190吨，B城有肥料310吨，现要把这些肥料全部运往C、D两乡。
从A城往C、D两乡运肥料的费用分别为每吨20元和26 元；从B城往C、D两乡运肥料的
费用分别为每吨16元和23元，现C乡需要肥料240吨，现D
乡需要肥料260吨,怎样调运总运费最少？
2.为加快教学手段的现代化，某校计划购置一批电脑。
已知甲公司的报价为每台5800元，优惠条件是购买10台以上，则从第11台起可以按报价的70% 计算，乙公司的报价也是每台5800元，但条件是为支持教育每台均按报价的85%计算。
假如你是学校负责人，在电脑品牌、质量、售后服务等方面完全相同的前提下，你如何选择？请说明理由。
3.已知一个正比例函数和一个一次函数的图像交于点P(-2，2)，且一次函数的图像与y轴交点Q的纵坐标为4 。
（1）求出这两个函数的解析式
（2）在同一坐标系中，分别画出这两个函数的图像；（3）求△PQO的面积。
2020年八年级上学期数学第一次月考试卷及答案
2020年八年级上学期第一次月考数学试卷4分，共40分）1.如图1，在△中，点是延长线上一点，=40°，=120°，则等于（）A.60°B.70°C.80°D.90°2.如果一个三角形的两边长分别为2和4，则第三边长可能是( )A．2 B．4 C．6 D．83.一个三角形的三边为2、5、x，另一个三角形的三边为y、2、6，若这两个三角形全等，则x + y =（）．A．7 B．8 C．10 D．114.用直尺和圆规作一个角等于已知角的示意图2如下，则说明∠A′O′B′＝∠AOB的依据是（）A．SSS B．SAS C．ASA D．AAS图1 图2 图3 图45.如图3，一副分别含有30°和45°角的两个直角三角板，拼成如图，其中∠C=90°，∠B=45°，∠E=30°，则∠BFD的度数是( )A．15° B．25° C．30° D．10°6.过一个多边形的一个顶点的所有对角线把多边形分成6个三角形，则这个多边形的边数为( )A．5 B．6 C．7 D．87.如图4，已知点A、D、C、F在同一直线上，且AB=DE，BC=EF，要使△ABC≌△DEF，还需要添加的一个条件是( )A．∠A=∠EDF B．∠B=∠E C．∠BCA=∠F D．BC∥EF8.如图5，OP平分∠MON，PA⊥ON于点A，点Q是射线OM上的一个动点，若PA＝2，则PQ的最小值为( )A．1 B．2 C．3 D．49.如图6，△ABC的三边AB、BC、CA长分别是20、30、40，其三条角平分线将△ABC分为三个三角形，则S△ABO︰S△BCO︰S△CAO等于（）A．1︰1︰1 B．1︰2︰3 C．2︰3︰4 D．3︰4︰5图5 图6 图7 图810.如图7，在△ABC中，∠ABC=45°，AC=8cm，F是高AD和BE的交点，则BF的长是( )A．4cm B．6cm C．8cm D．9cm二、填空题(每小题4分，共24分)11.如图8，一扇窗户打开后，用窗钩AB可将其固定，这里所运用的几何原理_________________．12.如果一个等腰三角形有两边长分别为4和9，那么这个等腰三角形的周长为__________．13.小明不慎将一块三角形的玻璃摔碎成如图9所示的四块（即图中标有1、2、3、4的四块），你认为将其中的哪一些块带去，就能配一块与原来一样大小的三角形？应该带_____.图9 图10 图11 图1214.如图10为6个边长相等的正方形的组合图形，则∠1+∠2+∠3=________.15.如图11，已知∠B=46°，△ABC的外角∠DAC和∠ACF的平分线交于点E，则∠AEC=_______．16.如图12，有一个直角三角形ABC，∠C＝90°，AC＝10，BC＝5，一条线段PQ＝AB，P，Q两点分别在AC和过点A且垂直于AC的射线AX上运动，问P点运动到______________位置时，才能使△ABC≌△QPA.年八年级上学期数学第一次月考答题卡二、填空题（本题共24分，每小题4分）11._________________ , 12._______________ , 13.________________ ,14.__________________ , 15._______________ ， 16.________________ .三、解答题（共86分）17．（8分）一个多边形的外角和是内角和的，求这个多边形的边数．18．(8分)张峰同学沿一段笔直的人行道行走，在由A步行到达B处的过程中，通过隔离带的空隙O，刚好浏览完对面人行道宣传墙上的社会主义核心价值观标语.其具体信息汇集如下.如图，AB∥OH∥CD，OB=OD，AC，BD相交于点O，OD⊥CD，垂足为D，已知AB＝20米请根据上述信息求标语CD的长度.19．(8分)如图，点D在△ABC的AB边上，且∠ACD=∠A．（1）作∠BDC的平分线DE，交BC于点E（用尺规作图法，保留作图痕迹，不要求写作法）；（2）在（1）的条件下，判断直线DE与直线AC的位置关系（不要求证明）．20.(10分)如图，点B，F，C，E在直线l上(F，C之间不能直接测量)，点A，D在l异侧，测得AB=DE，AC=DF，BF=EC.(1)求证：△ABC≌△DEF; (2)指出图中所有平行的线段，并说明理由.21.(10分)如图，CD⊥AB于点D，BE⊥AC于点E，△ABE≌△ACD，∠C=42°，AB=9，AD=6，G为AB延长线上一点．（1）求∠EBG的度数．（2）求CE的长．22.(10分)如图，△ABC中，∠ACB＝90°，DC＝AE，AE是BC边上的中线，过点C作CF⊥AE，垂足为点F，过点B作BD⊥BC交CF的延长线于点D.(1)求证：AC＝CB； (2)若AC＝12 cm，求BD的长．23.(10分)如图所示，在△ABC中，∠C=90°，AD是∠BAC的平分线，DE⊥AB交AB于点E，点F在AC上，BD=DF.求证：(1)CF=EB; (2)AB=AF+2EB．24.(10分)两个大小不同的等腰直角三角形三角板，如图①所示放置，图②是由它抽象出的几何图像，点B，C，E在同一条直线上，连接DC.(1)请找出图②中的全等三角形，并给予证明．(说明：结论中不得含有未标识的字母)(2)证明：DC⊥BE. 25.(12分)已知Rt△ABC≌Rt△ADE，其中∠ACB=∠AED=90°．（1）将这两个三角形按图①方式摆放，使点E落在AB上，DE的延长线交BC于点F．求证：BF+EF=DE；（2）改变△ADE的位置，使DE交BC的延长线于点F（如图②），则（1）中的结论还成立吗？若成立，加以证明；若不成立，写出此时BF、EF与DE之间的等量关系，并说明理由．2020年八年级上学期第一次月考数学试卷（答案）4分，共40分）1.如图，在△中，点是延长线上一点，=40°，=120°，则等于（C）A.60°B.70°C.80°D.90°2.如果一个三角形的两边长分别为2和4，则第三边长可能是( B )A．2 B．4 C．6 D．83.一个三角形的三边为2、5、x，另一个三角形的三边为y、2、6，若这两个三角形全等，则x + y =（ D）．A．7 B．8 C．10 D．114.用直尺和圆规作一个角等于已知角的示意图如下，则说明∠A′O′B′＝∠AOB的依据是（A）A．SSS B．SAS C．ASA D．AAS图1 图2 图3 图45.如图3，一副分别含有30°和45°角的两个直角三角板，拼成如图，其中∠C=90°，∠B=45°，∠E=30°，则∠BFD的度数是( A )A．15° B．25° C．30° D．10°6.过一个多边形的一个顶点的所有对角线把多边形分成6个三角形，则这个多边形的边数为( D )A．5 B．6 C．7 D．87.如图4，已知点A、D、C、F在同一直线上，且AB=DE，BC=EF，要使△ABC≌△DEF，还需要添加的一个条件是( B )A．∠A=∠EDF B．∠B=∠E C．∠BCA=∠F D．BC∥EF8.如图5，OP平分∠MON，PA⊥ON于点A，点Q是射线OM上的一个动点，若PA＝2，则PQ的最小值为( B )A．1 B．2 C．3 D．49.如图5，△ABC的三边AB、BC、CA长分别是20、30、40，其三条角平分线将△ABC分为三个三角形，则S△ABO︰S△BCO︰S△CAO等于（C）A．1︰1︰1 B．1︰2︰3 C．2︰3︰4 D．3︰4︰5图5 图6 图7 图810.如图6，在△ABC中，∠ABC=45°，AC=8cm，F是高AD和BE的交点，则BF的长是( C )A．4cm B．6cm C．8cm D．9cm二、填空题(每小题4分，共24分)11.如图7，李叔叔家的凳子坏了，于是他给凳子加了两根木条，这样凳子就比较牢固了，他所应用的数学原理是___三角形的稳定性_______．12.如果一个等腰三角形有两边长分别为4和9，那么这个等腰三角形的周长为____22______．13.小明不慎将一块三角形的玻璃摔碎成如图8所示的四块（即图中标有1、2、3、4的四块），你认为将其中的哪一些块带去，就能配一块与原来一样大小的三角形？应该带__②___.图8 图9 图10 图1114.如图10为6个边长相等的正方形的组合图形，则∠1+∠2+∠3=___135°_____.15.如图11，已知∠B=46°，△ABC的外角∠DAC和∠ACF的平分线交于点E，则∠AEC=____67°___．16.如图，有一个直角三角形ABC，∠C＝90°，AC＝10，BC＝5，一条线段PQ＝AB，P，Q两点分别在AC和过点A且垂直于AC的射线AX上运动，问P点运动到__AC的中点_位置时，才能使△ABC≌△QPA.三、解答题（共86分）17．（8分）一个多边形的外角和是内角和的，求这个多边形的边数．解：设这个多边形的边数为n，依题意得：（n﹣2）180°=360°，解得n=9．答：这个多边形的边数为9．18．(8分)张峰同学沿一段笔直的人行道行走，在由A步行到达B处的过程中，通过隔离带的空隙O，刚好浏览完对面人行道宣传墙上的社会主义核心价值观标语.其具体信息汇集如下.如图，AB∥OH∥CD，OB=OD，AC，BD相交于点O，OD⊥CD，垂足为D，已知AB＝20米请根据上述信息求标语CD的长度.解：∵ AB∥CD，∴∠ABO＝∠CDO.(1分)又∵ OD⊥CD，∴∠CDO＝90°.∴∠ABO＝90°，即OB⊥AB.(3分)在△ABO与△CDO中，∴△ABO≌△CDO.(6分)∴ CD=AB=20米.(8分)(也可利用“AAS”证△ABO≌△CDO，其他过程相同).解析：根据AB∥OH∥CD，利用平行线的性质可知∠ABO=∠CDO(或者∠BAO=∠DCO).由题意可证明OD，OB分别是平行线AB与OH以及OH与CD之间的距离，故OD=OB，根据“ASA”或者“AAS”证明△ABO ≌△CDO，所以CD=AB，进而求出CD的长.19．(8分)如图，点D在△ABC的AB边上，且∠ACD=∠A．（1）作∠BDC的平分线DE，交BC于点E（用尺规作图法，保留作图痕迹，不要求写作法）；（2）在（1）的条件下，判断直线DE与直线AC的位置关系（不要求证明）．解：（1）如图所示：（2）DE∥AC∵DE平分∠BDC，∴∠BDE=∠BDC，∵∠ACD=∠A，∠ACD+∠A=∠BDC，∴∠A=∠BDC，∴∠A=∠BDE，∴DE∥AC．20.(10分)如图，点B，F，C，E在直线l上(F，C之间不能直接测量)，点A，D在l异侧，测得AB=DE，AC=DF，BF=EC.(1)求证：△ABC≌△DEF;(2)指出图中所有平行的线段，并说明理由.(1)证明：∵ BF=EC，∴ BF+FC=EC+CF，即BC=EF.(3分)又AB=DE，AC=DF，∴△ABC≌△DEF.(5分)(2)AB∥DE，AC∥DF.(7分)理由：∵△ABC≌△DEF，∴∠ABC=∠DEF，∠ACB=∠DFE，∴ AB∥DE，AC∥DF. (10分)21.(10分)如图，CD⊥AB于点D，BE⊥AC于点E，△ABE≌△ACD，∠C=42°，AB=9，AD=6，G为AB延长线上一点．（1）求∠EBG的度数．（2）求CE的长．解：（1）∆ABE≅∆ACD∴∠EBA=∠C=42°（3分）∠EBG=0180—∠EBA=138°.（5分）(2) ∆ABE≅∆ACD∴AC=AB=9 AE=AD=6 .（8分）∴EC=AC-AE=9-6=3 . （10分）22.(10分)如图，△ABC中，∠ACB＝90°，DC＝AE，AE是BC边上的中线，过点C作CF⊥AE，垂足为点F，过点B作BD⊥BC交CF的延长线于点D.(1)求证：AC＝CB；(2)若AC＝12 cm，求BD的长．(1)证明：∵AF⊥DC，∴∠ACF＋∠FAC＝90°，∵∠ACF＋∠FCB＝90°，∴∠EAC＝∠FCB，在△DBC和△ECA，⎩⎪⎨⎪⎧∠DBC＝∠ACB＝90°∠DCB＝∠CAEDC＝AE，∴△DBC≌△ECA(AAS)，∴BC＝AC（2）解：∵E是AC的中点，∴EC ＝12BC ＝12AC＝12×12 cm＝6 cm，又∵△DBC≌△ECA，∴BD＝CE，∴BD＝6 cm23.(10分)如图所示，在△ABC中，∠C=90°，AD是∠BAC的平分线，DE⊥AB交AB于点E，点F在AC上，BD=DF.求证：(1)CF=EB; (2)AB=AF+2EB．证明：（1）∵ AD是∠BAC的平分线，DE⊥AB，DC⊥AC，∴ DE=DC．又∵ BD=DF，∴ Rt△CDF≌Rt△EDB（HL），∴ CF=EB.（2）∵ AD是∠BAC的平分线，DE⊥AB，DC⊥AC，∴△ADC≌△ADE，∴ AC=AE，∴ AB=AE+BE=AC+EB=AF+CF+EB=AF+2EB．24.(10分)两个大小不同的等腰直角三角形三角板，如图①所示放置，图②是由它抽象出的几何图像，点B，C，E在同一条直线上，连接DC.(1)请找出图②中的全等三角形，并给予证明．(说明：结论中不得含有未标识的字母)(2)证明：DC⊥BE.解：(1)△ABE≌△ACD，证明：∵AB＝AC，AE＝AD，∠BAC＝∠EAD＝90°，∴∠BAC＋∠CAE＝∠EAD＋∠CAE，即∠BAE＝∠CAD，∴△ABE≌△ACD(2)由△ABE≌△ACD得∠ACD＝∠ABE＝45°，又∵∠ACB＝45°，∴∠BCD＝∠ACB＋∠ACD＝90°，∴DC⊥BE 25.(12分)已知Rt△ABC≌Rt△ADE，其中∠ACB=∠AED=90°．（1）将这两个三角形按图①方式摆放，使点E落在AB上，DE的延长线交BC于点F．求证：BF+EF=DE；（2）改变△ADE的位置，使DE交BC的延长线于点F（如图②），则（1）中的结论还成立吗？若成立，加以证明；若不成立，写出此时BF、EF与DE之间的等量关系，并说明理由．证明：（1）如图①，连接AF，∵Rt△ABC≌Rt△ADE，∴AC=AE，BC=DE，∵∠ACB=∠AEF=90°，AF=AF，∴Rt△ACF≌Rt△AEF， (4分)∴CF=EF，∴BF+EF=BF+CF=BC，∴BF+EF=DE； (6分)（2）如图②，（1）中的结论不成立，有DE=BF﹣EF，(8分)理由是：连接AF，∵Rt△ABC≌Rt△ADE，∴AC=AE，BC=DE，∵∠E=∠ACF=90°，AF=AF，∴Rt△ACF≌Rt△AEF， (12分)∴CF=EF，∴DE=BC=BF﹣FC=BF﹣EF，即DE=BF﹣EF． (14分)。
湖南省长沙市北雅中学2023-2024学年八年级上学期第一次月考物理试题(无答案)
2023-2024-1 北雅中学初二第一次月考物理试卷初二年级物理科目考生注意：本试卷共 4 道大题，24 道小题，满分100 分，时量60 分钟一、选择题（本大题共12 小题，每小题 3 分，共36 分。
1～10 题为单选题，11～12 为双选题，双选题选对但不全得 2 分，有选错得0 分）1．下列几项描述中，属于机械运动的是（）A．春天，百花齐放，万物生长B．夏夜，湘江边霓虹灯闪烁C．秋天，校园里桂花香气袭人D．冬天，洁白的雪花落向地面2.为了让同学们养成关注生活和社会的良好习惯，物理老师让同学们对身边一些常见的物理量进行估测。
以下是他们交流时的一些估测数据，你认为数据明显合实际的是（）A．中学生的脉搏跳动一般每分钟200 次左右B．短跑运动员的速度可达10km/hC．中学生一个拳头的宽度约为1dm D．教室里的黑板长约4dm3.下列各图中，刻度尺使用方法正确的是（）A．B．C．D．4．2022 年冬季我国部分地区的空气被严重污染，有害物质含量严重超标，其中PM2.5 是天气阴霾的主要原因，PM2.5 是指大气中直径小于或等于2.5μm 的颗粒物，单个PM2.5 是隐藏在空气的浮尘中，容易被吸入人的肺部造成危害，下列关于PM2.5 颗粒物直径的单位换算正确的是（）A．2.5um = 2.5um ⨯10-6 m B．2.5um = 2.5 ⨯10-5dmC．2.5um = 2.5 ⨯10-6cm D．2.5um = 2.5 ⨯10-9 m5.佳佳同学用同一把刻度尺对同一物体的长度进行了4 次测量，结果如下：12.34cm、12.36m、12.35cm、12.75cm，则该物体的长度应记为（）A．12.35cm B．12.34cm C．12.45cm D．12.36cm6.在路口等红灯时，小蕊同学坐在爸爸的轿车里四处观望，当她看向右旁邻道并排的大巴车时，感觉爸爸的车在后退，当她看到路旁的树时，发现爸爸的车并没有动。
2020-2021学年江苏省昆山市第二中学八年级上学期10月英语月考试卷(无答案)
2020-2021学年昆山二中英语八年级10月第一次月考试卷一听力略二、选择填空（共15小题；每小题1分，满分15分）( )21. —Do you think Tom is honest boy?—Of course. He is most honest in our class.A. a; theB. an; theC. the; theD. an; /( )22. People in the UK say “lorry” while people in the USA say “ ”.A. hallB. elevatorC. truckD. soccer( )23. The weather in Heilongjiang is much colder than in Hainan.A. thisB. thatC. theseD. weather( ) 24.I also keep the story English about my daily life.A.t o write; inB. to write; withC. writing; withD. writing; in( 25. What’s the of the building? –It’s 236 metres .A. high; highB. height; heightC. high; heightD. height; high( )26.Shanghai is larger than in Jiangsu.A.a ny cityB. all other citiesC. other citiesD. any other city( )27.When you are doing reading exercises, it is a good idea to the questions before you read the articles（文章）.A. look overB. look afterC. look throughD. look into( ) 28. Maths is one of Peter’s subjects.A. worseB. the worseC. worstD. the worst( )29. Can you finish the work well with money and people.A. less; lessB. less; moreC. more; fewerD. less; fewer( ) 30. Why not your teacher for help when you can’t finish it by yourself?A ask; writing B. to ask; writing C. ask; write D. asking; write( ) 31. James’mother looked at the children. How she looked!A. happy; happilyB. happy ; happyC. happily ; happyD. happily ; happily( ) 32. In our school library, there a number of books on science and the number of them growing larger and larger.A.Is; areB. are; isC. is; isD. are; are( ) 33. When something you, I will always help you, so don’t it.A. worry about; worryB. worry; worry aboutC. worries; worry aboutD. worries; worry( ) 34. you are, mistakes you’ll make.A. The more careful, the fewerB. More careful, the lessC. The more careless, the lessD. More careless, fewer( ) 35. — Do you enjoy the meal I cooked for you, Tom?—Yes. It can’t be .A. goodB. bestC. betterD. worse三、完型填空Many people go to school for an education. They 36 languages and other subjects. Others go to37 to learn a skill so that they can make a living.38 no one can learn everything from school. A teacher, no matter 39 he knows, can not teach his students everything they 40 to know. So, much more is to be learned 41 school by the students themselves. It is always 42 to know how to study by oneself than to memorize some formulas (公式).Formulas are easy to remember but difficult to use in 43 out maths problems. As we all know, great 44 such as Einstein, Newton and Galileo, didn’t learn many thin from school. But they were all so successful that they 45 so many things for us.36. A. dislike B. speak C. learn D. make37. A. park B. school C. home D. cinema38. A. Though B. But C. If D. Or39. A. how often B. how many C. how soon D. how much40. A. want B. stop C. forget D. fail41. A. from B. outside C. in D. within42. A. more important B. important C. most important D. unimportant43. A. doing B. getting C. working D. taking44. A. workers B. scientists C. doctors D. students45. A. remembered B. celebrated C. invented D. shared四、阅读理解（共15小题，每小题2分，计30分）AAmerican and British people both speak English of course. But sometimes there are some important differences between British English and American English.First of all, they sound very different. Often, Americans don’t say each word separately. They say several words together. Americans may say “I dunno” instead of “I don’t know”. Or they may say “Whaddya say?” instead of “What did you say?” However, the British are more careful. They usually say all the words and keep them separate.Sound is not only the difference. Words sometimes have different meanings too. For example, the vocabulary for cars and driving is very different. Americans drive trucks, but in England people drive lorries.Many expressions(短语)are also different in the two countries. In England, if you are going to telephone your friends, you “phone them up”. In America, you “give them a call”. When you are saying goodbye in England you might say “Cheerio!” In America you might say “See you later.”There’re also some differences in grammar. For example, Americans usually use the helping verb “do” when they ask a question. They say “Do you have a storybook?” But the British often leave out the helping verb. They say “Have you a storybook?”Most languages are like this. Languages change over time. When people live in separate places, the languages change in different ways. This is what has happened to English. It can also happen to other languages, such as French. Many people in Canada speak French but their French is very different from the French of France.46.What does the word “separately” mean in the passage? It means “ ”.A.含蓄地B.快速地C.分开地D.简略地47.The vocabulary for cars and driving is .A.an example of British EnglishB.an example of American EnglishB.the same in America and England D.not the same in America and Englandnguages .A.are always changing as time passesB.keep unchanged even if time changesC.are the same in all placesD.are easy to learn49.Which of the following sentences is right according to the passage?A.American people usually say “I don’t know” instead of “I dunno”.B.There are four differences between American and British English.C.Canadians speak all the same French as Frenchmen.D.When people live in different places,the languages are spoken in the same way.50.This passage is mainly about .A.English vocabularyB.how American sounds are different from British soundsC.the way the British say wordsD.some differences between American and British EnglishBAnne and Joseph are talking about an interesting question. Why do some people change theirnames? There can be many reasons. Hanna changed her name to Anne because she thought itwould be easier for people to remember. On the other hand, Joseph is thinking about changing hisname to an unusual name because he wants to be different.People have a lot of reasons for changing their names. Film stars, singers, sportsmen and some other famous people often change their names because they want names that are not ordinary, or that have special sound. They chose the "new name" for themselves instead of the name their parents gave them when they were born.Some people have another reason for changing their names. They have moved to a new country and want to use a name that is usual there. For example, Li Kaiming changed his name to Ken Lee when he moved to the United States. He uses the name Ken at his job and at school. But with his family and Chinese friends, he uses Li Kaiming. For some people, using different names makes life easier in their new country.In many countries, a woman changes her family name to her husband’s after she gets married(结婚). But today, many women are keeping their own family name and not using their husband’s. Sometimes, women use their own name in some situations(情况) and their husband’s in othersituations. And some use both their own name and the ir husband’s.51.Hanna changes her name to Anne because "Anne" is __________ for people to remember.A.louderB. easierC. prettierD. harder52.Famous people want their new names to __________.A. have special soundB. be ordinaryC. have no meaningD. be unknown53.Mr Li uses his new name when he __________.A. stays with his familyB. is at his jobC. is among Chinese friendsD. comes back to China54.What is the best title(标题) of this passage?A. Family NamesB. Women’s NamesC. Changing NamesD. Special Names55.Which of the following is NOT true?A. Some women don’t change their own family name after they get married today.B. Some women use their husband’s family name after they get married.C. Some women don’t have family name after they get married.D. Some women use both their own name and their husband’s.CEveryone needs friends. Friends bring us happiness and hope in our lives. But the ability to make friends changes from person to person. To some people, making friends is easy, and to others it’s very difficult.Making friends is a skill, and the first thing is to know how to get on with others.If you have trouble in making friends, maybe I can tell you how to do it.Know your own good points. You have skills and talents that others will like.Believe that you are a good person and have something nice to share with others.Be humorous. Learn to laugh at yourself and your weakness. Remember to smile at others.Respect the others. Everyone has his own idea. Learn how to listen to others’ ideas without trying to make them accept yours.Be kind. If you are kind to others, they will usually be kind to you. There are hundreds of little things you can do to show your kindness. Open the door for someone. Wave to a friend and so on.Don’t complain. Learn to accept what you can’t change, and work hard to change what you can. No one is willing to hear your complaints all the time.Never give up. Even if you are faced with some closed-minded people, never give up. And try to find someone who will understand you.56.Why do we need friends according to the passage?A．Friends can do everything for us. B．Friends can bring us happiness.C．Friends accept our ideas all the time. D．Without friends, we could not live.57.What’s the first thing we should learn in order to (为了)make friends?A．To get on with others. B．To smile to others.C．To help others. D．To listen to others’ complaints.58.Which of the following shows a sense of humor?A．Opening the door for someone.B．Complaining to others all the time.C．Laughing at ourselves and our weakness.D．Finding someone who will understand us.59.How many pieces of advice does the writer provide when we have trouble in making friends?A．Five. B．Seven. C．Nine. D．Eleven.60. Which is NOT right?A. If we are friendly to others, they will be friendly to usB. To all of us, making friends is easy.C. There are many things you can do to show kindnessD. Everyone needs friends五、信息还原Miss Wu: Can I help you?Li Gang: Yes, Id like to return this book, please.Miss Wu: ____61_______Li Gang: No, I couldn't read it. I had a hard time reading a few pages, and then I decided togive up.Miss Wu:______62________Li Gang: It isn't the language. It is the words. They are too small for me.Miss Wu:_____63_______ What can I do for you then?Li Gang: Well, I'd be glad if you could find me another book.Miss Wu:_______64________Li Gang: Yes, but one with bigger words.Miss Wu:______65_________Li Gang: Oh. Oliver Twist. This one is fine. And the words are much bigger. Thank you very much Miss Wu: You're welcome六、词汇检测(共9小题;每小题1分，满分9分)66.They spent the whole afternoon （讨论）the problem at the meeting.67.You can search the Internet for （进一步）intonation.68 There will be a drawing （竞赛in our school.69. Our Chinese teacher is very (幽默的). He often tells funny jokes.70. I think these children are too young to sit （自始至终）the whole meeting.71 Of all the subjects, I like (物理)best.72. "Holiday" is in American English.73. -You look unhappy. What's the matter?-I’ve had a bad cough and the terrible weather makes me feel even74.- The dog did a good job. It helped its master find her wallet-Yeah, we all know that dogs have a good of smell.七、翻译句子75.每年冬天，我们休假约20天。
吉林省德惠市第三中学2020学年八年级英语上学期第一次月考试题(无答案) 人教新目标版
德惠三中八年级月考试卷英语 Ⅰ、根据句意完成句子。
（10分） 1 He’s unhealthy . He ________ ever exercises . 2 _____ you shouldn’t like that .It is not good for you . 3 Could you tell me the _____between the twins. 4 We had to stop the sports meeting _______of the heavy rain. 5. There is ________ wrong with the watch . It works well . 6. Did _______ go to play basketball with you ? 7. My English teacher is ________ , and she always works hard . 8. As we all know ,Mo Yan is a famous ______. 9. He ________ the first prize in the 100-meter race last week 10. My mother always cares _______ my health . Ⅱ、用所给词的适当形式填空（10分） 11 . My mother go to Beijing ________( two ) a year. 12. His father ________( die)three years ago . 13. Tom sings________ ( clearly ) than Ted. 14 .Paul, look after ________ ( you ) when your parents are not at home . 15 .There are many ___________( build ) in our city . 16. Kitty is ________ ( good )at English than most of kids. 17. They think the best way________ ( relax )is listening to music . 18. Did Julie go________( somewhere )warm yesterday? 19. It was a re ally ________( enjoy )evening . 20. He never ________( go )shopping. Ⅲ、单项选择（15分） ( )21 . It is sunny ,so I decide ______to the beach. A . go B .going C .to go D .went ( )22 . Young people don not know what life was ______the past A . likes in B . liked at C .like with D . like in ( )23 . ___Have you read today’s newspapers. ___Yes, but there isn’t ______ A . something new B . new something C . anything new D . new any thing ( )24 . There was ______rain last year , so the plants ( 植物 ) didn’t grow well. A .a little B.little C .much D .few( )25 The book is ______for us to read and it is also fun.A .hard enoughB .enough hardC .easy enoughD .enough easy( )26.The meat on the plate tastes very______.A .goodB .wellC .greatlyD .terribly( )27.They______some rice ______supper last night.A . had forB .have forC .had forD .have for( )28. How often do the students play sports? A .Twice a week B .Three times C .A month ago D .For two hours( )29. _____Jack ______Tony play the drums well ?-----Yes , they do .学校： 班级： 姓名： 考场： 考号：A .Because, andB . From, toC .Between , andD .Both ,and( )30.His mother wants him ______at home today.A .staysB .stayedC .to stay D. staying( )31.Do you mind ______me with my English ?A .helpB .helpingC .to helpD .helps( )32. Everyone in our class _________happy last week .A .wasB .wereC .isD .are( )33.This house is as ______as that one.A .the most beautifulB .more beautifulC . beautifulD . the more beautiful( )34 .Li Lei is ______talle r than me .A .tooB .veryC .quiteD .much( )35 .Her bag is newer than ______.A .mineB .myC .meD .IⅣ、从题后方框中选择怡当的句子完成对话，有一项是多余的（只填序号）. ( 5分)A: Tomorrow is Saturday. What do you usually do?B:_________36 What about you?A:I often go to the movies.B: ________37 .How often do you go to the movies?A: ________38B: What is your favorite film ?A: ________39B: Who do you usually go with?A : _______-40B : Are you going to the movies this weekend?A: Yes. Would you like to go with us?B: I’d love to, but I have to shop then. Have a good time with your friend!A: Thank you.Bye!A.I go to the movies once a week.B.I like movies,too.C.I usually go shopping.D.My friend, Lily.E.CINDERELLA.( 灰姑娘 )F.How often do you watch them?Ⅴ完形填空(每小题1分，共15分)先通读下面的短文，掌握其大意，然后从A、B、C、 D 四个选项中选择可以填入空白处的最佳答案。
广西壮族自治区南宁市西乡塘区2020学年八年级英语上学期第一次月考试题(无答案) 外研版
南宁2020年秋季学期八年级(上)第一次月考试卷英语（本试卷共七大题，满分120分，考试时间120分钟）第I 卷 （共90分）一、听力测试（30小题，每小题1分，共30分）（一）听句子，选图画。
（共5小题，每小题1分，共5分） 听句子，选择与你所听到的句子内容相符的图画。
每个句子读一遍。
A. B. C. D. E. F. 1. ________ 2. ________ 3. ________ 4. ________ 5. ________ （二）听句子，选答语。
（共5小题，每小题1分，共5分） 听句子，选择恰当的答语。
每个句子读两遍。
( ) 6. A. At 8 o ’clock. B. At the school gate. C. By bus. ( ) 7. A. I played with the snow. B. I’m so sorry. C. I went there last month. ( ) 8. A. Thanks. B. Not at all. C. Good idea. ( ) 9. A. Yes, please. B. Football. C. I don ’t like it. ( ) 10. A. It doesn ’t matter. B. That ’s right. C. I think so. （三）听对话，选择最佳答案（共10小题，每小题1分，共10分）请听对话，根据对话内容回答11-15小题。
每个对话读两遍。
( ) 11. How does Lingling learn English? A. She listens to the radio. B. She watches English films. C. She listens to English songs.( ) 12. Where did Liu Bin go yesterday?A. The Summer Palace.B. The Great Wall.C. Beijing Zoo.( ) 13. How often does Linda listen to the radio?A. Once a day.B. Not every day.C. Quite often.( ) 14. What is the matter with Tony? A. He has to go to the English club.学 校班 级姓 名座 号B. He can’t play tennis.C. He hurt his knee last night.( ) 15. What languages can John speak?A. English and a little Japanese.B. Chinese and Japanese.C. English and Chinese.请听第一段对话，回答第16-17小题。
湖南省常德市育才中学八年级2020-2021学年上学期第一次月考试卷( 无答案)
2020年下学期常德市育才中学⼋年级第⼀次阶段考试试卷时量90, 分钟满分：120分第⼀部分阅读理解（共25⼩题，每题2分，满分50分）阅读下⾯的材料，从媒体所给的A，B，C三个选项中，选出最佳选项回答问题。
A1. ______ of the students study English by writing to their pen pals?A. 9B. 16C. 552. Which of the following is TRUE according to the chart above?A. We did a survey among students from No.1 High School.B. We asked students about their after-school activities.C. The boys likes learning English by using the Internet best.B3. If students join the Fun English Tour, how will they hey to Beijing?A. By trainB. By shipC. By plane4. When can students enjoy the famous play Hamlet?A. At 9:30 am on September 22.B. At 10:00 am on September 22.C. At 9:30 am on September 23.5. Which one is NOT TRUE according to the ad above?A. Students can enjoy delicious Beijing duck during the trip.B. Students can do anything they like in the afternoon during the trip.C. Students can learn more about the tour by going through the website.CHello, I’m Zheng Yishi from Shanghai. I’m 14 years old. As an international (国际的) students in the United States, I have felt the culture (⽂化的) differences between China and United States. So the biggest difference to me is how people greet each other.Now I am staying with my homestay family (寄宿家庭). Every morning my homestay sister asks me, “Good morning, how are you?”The first time she said this, I answered, “Everything is good.” But every morning, day after day, she asked me the same question. Then one day I asked my homestay family about this and learned it is just a same greeting in the US. When Americans meet someone, such as a shop keeper, they often greet him or her with, “Hi, How are you?” He or she may answer, “Good, and you?” Then you may ask your question.Then another time when I was in class, I sneezed (打喷噻). About half of the class turned to me and said, “Bless (保佑）you!” “I felt strange, So I asked a classmate and he told me it is a habit in the US. You don’t need to do anything when others say, “Bless you!” “Have a good day” and “have a nice weekend” can always hear in the US. I learned it's not so difficult to understand the greeting habits here.As the saying goes, “When in Rome, do as the Romans do.”6. For the writer, the biggest difference between China and the US is ______.A. the way people greet each otherB. how to make friends with othersC. the way you eat food7. From the passage, we know “______” may be a common greeting in the US.A. How do you do?B. HelloC. How are you?8. How did the writer feel when he heard many classmates say “Bless you.” to him?A. ⼊乡随俗B. 罗马不是⼀天建成的C. 爱屋及乌10. Which of the following is not true in the US?A. People often begin a conversation with a greeting.B. Sometimes we needn’t do anything about others’ greetings.C. The writer thinks that it is so hard to understand their greeting habits.DSitting in front of the television may be relaxing, but spending too much time in front of it may take years off your life. Watching less television may help you live a longer life.Australian researchers (研究者) studied more than 11,000 people over the age of 25. Their study showed that if people watched TV for six hours a day, they lived about 4.8 years less than those who didn’t watch any television. Also, people who are over the age of 25 lose 22 minutes of life for each hour of TV that they watch.Sitting in front of the television isn’t healthy. The more TV you watch, the less exercise you’ll get. And the less exercise you get, the more likely that you’ll be ill.Lennert Veerman, the researcher, say watching too much TV will influence people’s life expectancies (预期寿命), even for people who have a good eating habit. He thinks it’s time for doctors to start asking their patients about how much TV they watch, as it can be an indicator (指标) of their health.As a result, Veerman has called on people to turn off their TV and get off their TV and get off the sofa to get some exercise. “Exercise is good,” he said. “Even light activity is good for health. "11. Australian researchers did a study on ______.A. what people should do to live longerB. what people usually do to relax after workC. how watching too much TV can be bad for people12. According to the study, if a 35-year-old man watches TV for two hours, he will lose _____ of life.A. 44 minutesB. 4.8 yearsC. 22 minutes13. Paragraph 3 mainly tells us ______.A. why watching TV is bad for our healthB. why people don't exercise enoughC. how long people should exercise every day14. What does the underlined word “influence" in Paragraph 4 mean?A. 伤害B. 影响C. 导致15. According to Veerman, what should we do to keep healthy?A. Have a healthy eating habit.B. Go to the doctor oftenC. Get more exercise instead of watching TV.EMy name is Eric. Last July, I went to Walt Disney World in Orlando, Florida. It was a wonderful trip because I spent time with my family. I went there with my dad, mom, brother and sister. We had lots of fun there. We took my dad’s new car to Florida. It was a long trip but we enjoyed ourselves on the way. We went to a dinner show — Jolly Holiday. It has funny characters (⼈物) and lots of singing. We enjoyed it.I went on rides with my dad, brother and sister. We went on Splash Mountain. We went through a tunnel (隧道). We saw different Disney characters. My mom took photos of me with different Disney characters. We saw Cinderella at the Magic Kingdom. She gave a show with her friends. At the Beach Club Resort, my family saw Chip and Dale. They walked around to meet everyone.16. When did Eric take a trip to Walt Disney World last year?A. In June.B. In JulyC. In August.17. How many people went to Florida with Eric?A. Two.B. ThreeC. Four.18. How did Eric get to Florida?A. By car.B. By bus.C. By train.19. Where did Eric see Cinderella?A. At a dinner show.B. On Splash Mountain.C. At the Magic Kingdom.20. Which of the following is TRUE?A. Cinderella gave a show at a Jolly Holiday.B. Chip and Dale walked around to meet people.C. Eric’s dad took photos of him with Disney characters.FFor everyone, running from Zhejiang to Tibet is not easy. It is such a long trip. But 54-year-old LiuZhengqian made it.Liu works in Zhejiang as a businessman. Hie loves running. In fact, he is also a marathone (马拉松) runner. Two years ago, he had the idea of running to Lhasa, but did not have the chance. In November, 2019, when his business was slow, he thought about it again. Liu loved running and he hoped to this trip would tell more people to have a healthy life.Then Liu began to make a plan and get ready for it. He thought about different things along the way and wrote them down. He trained hard and ran several marathons, On November 17, 2019, Liu set off.Liu planned to run about 42 kilometers every day. It was difficult, but he still decided to finish the trip. Every day, Liu livestreamed (直播) his trip. Many people watched him online and encouraged him. He made many new friends. He said that was a great present for him.On the afternoon of May 6. 2020, Liu arrived in Lhasa. He finally finished the 4, 500-kilometer trip. "It is just like life. There are always ups and downs but with a good ending”, he said.21. Liu Zhenqian started to run to Tibet when he was ______ years old.A. 51B. 52C. 5322. Liu wanted to run to Lhasa because ______.A. He liked the cityB. he lobe runningC. he wanted to keep healthy23. Liu was _____ when he planned the trip to Tibet.A. carefulB. tiredC. unhappy24. The underlined word “that” refers to ______.A. running several marathonesB. finishing the tripC. making new friends25. What’s the best title of the reading?A. Everything is possible.B. Liu completes 4,500-km run to Tibet.C. Have a healthy life by running.第⼀节完形填空（共15⼩题；每⼩题1分，共15分）阅读下⾯的短⽂，掌提其⼤意，然后从所给的⼊、B、C三个选项中选出⼀个最佳答案。
江苏省徐州市铜山县柳新镇中心中学2020学年八年级英语上学期第一次月考试题(无答案) 牛津译林版
2020学年度八年级第一次学情调研考试英语试卷一、单项选择(15分)( ) 1.----Can I have ________? ---- Of course .Here you are..A. some more foodB. a few foodC. any more foodD. a little eggs( ) 2.----_________ honest boy you are ! ----Thank you!A. What anB. WhatC. How anD. What a( )3.I have money than you, but I have friends than you.A. more; moreB.less; moreC.fewer; moreD.more; less( ) 4. Millie is very _______,so we all want to make _______ with her.A. friends friendlyB. friendly friendsC. friendly friendlyD. friends friends( ) 5.Don’t believe ______ he says. He’s just telling a lie .A. howB. whenC. whatD. where( ) 6.--- I spend______ time on my homework than you do .That means you have _____ homework than I do.A. less, muchB. more, lessC. less, lessD. more, more( )7.Mr Li often makes us_ _________in his class, so we all like him.A. laughB. to laughC. laughingD. laughed( )8. This film is ___________ interesting than that one.A. more muchB. much moreC. veryD. the more( )9. Chinese students have weeks in the summertime than American students.A. many; offB. fewer;offC. more; offD. less; off( ) 10. She sings beautifully. I never hear ________ voice(嗓音)。
2020年河南省洛阳八年级(上)第一次月考数学试卷
月考数学试卷题号一二三总分得分一、选择题（本大题共10小题，共30.0分）1.以下列各组线段为边，能组成三角形的是（）A. 2cm，3cm，5cmB. 3cm，3cm，6cmC. 5cm，8cm，2cmD. 4cm，5cm，6cm2.已知等腰三角形的两边长分别为3和6，则它的周长等于（）A. 12B. 12或15C. 15D. 15或183.如图，在△ABC中，∠B=67°，∠C=33°，AD是△ABC的角平分线，则∠CAD的度数为（）A. 40°B. 45°C. 50°D. 55°4.将一副三角板按如图所示摆放，图中∠α的度数是（）A. 75°B. 90°C. 105°D. 120°5.一个多边形的内角和是外角和的2倍，则这个多边形的边数为（）A. 4B. 5C. 6D. 76.如图，在△ABC和△A′B′C′中，AB=A′B′，∠B=∠B′，补充条件后仍不一定能保证△ABC≌△A′B′C′，则补充的这个条件是（）A. BC=B′C′B. ∠A=∠A′C. AC=A′C′D. ∠C=∠C′7.如图，已知△ABE≌△ACD，∠1=∠2，∠B=∠C，不正确的等式是（）A. AB=ACB. ∠BAE=∠CADC. BE=DCD. AD=DE8.如图是用直尺和圆规作角平分线的示意图，通过证明△DOP≌△EOP可以说明OC是∠AOB的角平分线，那么△DOP≌△EOP的依据是（）A. SSSB. SASC. ASAD. AAS9.等腰三角形一腰上的高与另一腰的夹角为30°，它的顶角为（）A. 30°B. 60°C. 120°D. 60°或120°10.下列命题中，正确的是（）A. 全等三角形的高相等B. 全等三角形的中线相等C. 全等三角形的角平分线相等D. 全等三角形对应边上的高相等二、填空题（本大题共5小题，共15.0分）11.如图，为了使一扇旧木门不变形，木工师傅在木门的背后加钉了一根木条，这样做的道理是______．12.一个多边形的每个内角都等于150°，则这个多边形是______边形．13.在△ABC中，∠C=90°，BC=16cm，∠BAC的平分线交BC于D，且BD：DC=5：3，则D到AB的距离为______cm．14.如图，三角形纸片ABC，AB=10cm，BC=7cm，AC=6cm，沿过点B的直线折叠这个三角形，使顶点C落在AB边上的点E处，折痕为BD，则△AED的周长为______cm．15.如图，已知：BD是∠ABC的平分线，DE⊥BC于E，S△ABC=36cm2；，AB=12cm，BC=18cm，则DE的长为______cm．三、解答题（本大题共8小题，共75.0分）16.已知：如图，AB∥CD，求图形中的x的值．17.如图，等腰三角形ABC中，AB=AC，一腰上的中线BD将这个等腰三角形周长分成15和6两部分，求这个三角形的腰长及底边长．18.如图，AB=DE，AC=DF，BE=CF．求证：AB∥DE，AC∥DF．19.如图，已知AB=DC，AC=DB．求证：∠1=∠2．20.如图，AD为△ABC的中线，BE为三角形ABD中线，（1）在△BED中作BD边上的高EF；（2）若△ABC的面积为60，BD=5，求EF的长．21.如图，在△ABC和△DEF中，B、E、C、F在同一直线上，下面有四个条件，请你从中选三个作为题设，余下的一个作为结论，写出一个正确的命题，并加以证明．①AB=DE；②AC=DF；③∠ABC=∠DEF；④BE=CF；解：我写的真命题是：在△ABC和△DEF中，已知：______．求证：______．（不能只填序号）证明如下：22.如图（1），在△ABC中，∠ABC、∠ACB的平分线相交于点O（a）若∠A=60°，求∠BOC的度数；（b）若∠A=n°，则∠BOC= ______ ；（c）若∠BOC=3∠A，则∠A= ______ ；（2）如图（2），在△A′B′C′中的外角平分线相交于点O′，∠A′=40°，求∠B′O′C′的度数；（3）上面（1），（2）两题中的∠BOC与∠B′O′C′有怎样的数量关系？23.如图1，在△ABC中，∠ACB=90°，AC=BC，直线MN经过点C，且AD⊥MN于D，BE⊥MN于E．（1）①写出图1中的一对全等三角形；②写出图1中线段DE、AD、BE所具有的等量关系；（不必说明理由）（2）当直线MN绕点C旋转到图2的位置时，请说明DE=AD-BE的理由；（3）当直线MN绕点C旋转到图3的位置时，试问DE、AD、BE又具有怎样的等量关系？请直接写出这个等量关系（不必说明理由）．答案和解析1.【答案】D【解析】解：根据三角形的三边关系，知A、2+3=5，不能组成三角形；B、3+3=6，不能够组成三角形；C、2+5=7＜8，不能组成三角形；D、4+5＞6，能组成三角形．故选：D．根据三角形的三边关系“任意两边之和大于第三边，任意两边之差小于第三边”，进行分析．此题考查了三角形的三边关系．判断能否组成三角形的简便方法是看较小的两个数的和是否大于第三个数．2.【答案】C【解析】解：∵等腰三角形的两边长分别是3和6，∴①当腰为6时，三角形的周长为：6+6+3=15；②当腰为3时，3+3=6，三角形不成立；∴此等腰三角形的周长是15．故选：C．由于等腰三角形的两边长分别是3和6，没有直接告诉哪一条是腰，哪一条是底边，所以有两种情况，分别利用三角形的周长的定义计算即可求解．此题主要考查了三角形的周长的计算，也利用了等腰三角形的性质，同时也利用了分类讨论的思想．3.【答案】A【解析】解：∵∠B=67°，∠C=33°，∴∠BAC=180°-∠B-∠C=180°-67°-33°=80°∵AD是△ABC的角平分线，∴∠CAD=∠BAC=×80°=40°故选A．首先利用三角形内角和定理求得∠BAC的度数，然后利用角平分线的性质求得∠CAD的度数即可．本题考查了三角形的内角和定理，属于基础题，比较简单．三角形内角和定理在小学已经接触过．4.【答案】C【解析】解：∵图中是一副直角三角板，∴∠BAE=45°，∠D=60°，∠DAE=90°，∴∠DAF=90°-∠BAE=90°-45°=45°，∴∠α=∠DAF+∠D=45°+60°=105°．故选C．先根据直角三角形的性质得出∠BAE及∠D的度数，再由三角形外角的性质即可得出结论．5.【答案】C【解析】解：设这个多边形是n边形，根据题意，得（n-2）×180°=2×360，解得：n=6．即这个多边形为六边形．故选：C．多边形的外角和是360°，则内角和是2×360=720°．设这个多边形是n边形，内角和是（n-2）•180°，这样就得到一个关于n的方程组，从而求出边数n的值．本题考查了多边形的内角与外角，熟记内角和公式和外角和定理并列出方程是解题的关键．根据多边形的内角和定理，求边数的问题就可以转化为解方程的问题来解决．6.【答案】C【解析】解：A、若添加BC=BˊCˊ，可利用SAS进行全等的判定，故本选项错误；B、若添加∠A=∠A'，可利用ASA进行全等的判定，故本选项错误；C、若添加AC=A'C'，不能进行全等的判定，故本选项正确；D、若添加∠C=∠Cˊ，可利用AAS进行全等的判定，故本选项错误；故选：C．全等三角形的判定可用两边夹一角，两角夹一边，三边相等等进行判定，做题时要按判定全等的方法逐个验证．本题考查了全等三角形的判定，熟练掌握全等三角形的判定，要认真确定各对应关系．7.【答案】D【解析】解：∵△ABE≌△ACD，∠1=∠2，∠B=∠C，∴AB=AC，∠BAE=∠CAD，BE=DC，AD=AE，故A、B、C正确；AD的对应边是AE而非DE，所以D错误．故选：D．根据全等三角形的性质，全等三角形的对应边相等，全等三角形的对应角相等，即可进行判断．本题主要考查了全等三角形的性质，根据已知的对应角正确确定对应边是解题的关键．8.【答案】A【解析】【分析】本题考查的是全等三角形的判定，要清楚作图时作出的线段OD与OE、PD与PE是相等的．熟练掌握三角形全等的判定条件是解答此题的关键．易知：OD=OE，PD=PE，OP=OP，因此符合SSS的条件，故选择A．【分析】解：由作图知：OD=OE、PD=PE、OP是公共边，即三边分别对应相等（SSS），△DOP≌△EOP，故选A．9.【答案】D【解析】解：分两种情况：①当高在三角形内部时（如图1），∵∠ABD=30°，∴顶角∠A=90°-30°=60°；②当高在三角形外部时（如图2），∠CAB=90°+30°=120°．故选D．等腰三角形的高相对于三角形有三种位置关系，三角形内部，三角形的外部，三角形的边上．根据条件可知第三种高在三角形的边上这种情况不成立，因而可分两种情况进行讨论．此题主要考查等腰三角形的性质，熟记三角形的高相对于三角形的三种位置关系是解题的关键，本题易出现的错误是只是求出60°一种情况，把三角形简单的认为是锐角三角形．因此此题属于易错题．10.【答案】D【解析】解：A、全等三角对应边上的高相等，故错误；B、全等三角形的对应边的中线相等，故错误；C、全等三角形的对应角的平分线相等，故错误；D、全等三角形的对应边上的高相等，正确，故选D．利用全等三角形的性质分别判断后即可确定正确的选项．本题考查了命题与定理的知识，解题的关键是了解全等三角形的性质，难度不大．11.【答案】利用三角形的稳定性【解析】解：这样做的道理是利用三角形的稳定性．三角形具有稳定性，其它多边形不具有稳定性，把多边形分割成三角形则多边形的形状就不会改变．本题考查三角形稳定性的实际应用，三角形的稳定性在实际生活中有着广泛的应用，如钢架桥、房屋架梁等，因此要使一些图形具有稳定的结构，往往通过连接辅助线转化为三角形而获得．12.【答案】12【解析】解：由题意可得：180°•（n-2）=150°•n，解得n=12．故多边形是12边形．根据多边形的内角和定理：180°•（n-2）求解即可．主要考查了多边形的内角和定理．n边形的内角和为：180°•（n-2）．此类题型直接根据内角和公式计算可得．13.【答案】6【解析】【分析】本题主要考查角的平分线上的点到角的两边的距离相等的性质．利用线段相等学会线段的转移，利用相等的线段进行线段转移是一种很重要的方法，注意掌握．利用角的平分线上的点到角的两边的距离相等可知D到AB的距离为等于CD的长度，求CD长即可．【解答】解：∵∠C=90°，BC=16cm，∠BAC的平分线交BC于D，∴CD就是D到AB的距离，∵BD：DC=5：3，BC=16cm，∴CD=6，即D到AB的距离为6cm．故答案为6．14.【答案】9【解析】解：DE=CD，BE=BC=7cm，∴AE=AB-BE=3cm，∴△AED的周长=AE+AD+DE=AC+AE=6+3=9cm．由折叠中对应边相等可知，DE=CD，BE=BC，可求AE=AB-BE=AB-BC，则△AED的周长为AD+DE+AE=AC+AE．本题利用了折叠的性质：折叠是一种对称变换，它属于轴对称，根据轴对称的性质，折叠前后图形的形状和大小不变，位置变化，对应边和对应角相等．15.【答案】2.4【解析】解：如图，过点D作DF⊥AB于F，∵BD是∠ABC的平分线，DE⊥BC，∴DE=DF，S△ABC=S△ABD+S△BCD，=AB•DF+BC•DE，=×12•DE+×18•DE，=15DE，∵△ABC=36cm2，∴15DE=36，解得DE=2.4cm．故答案为：2.4．过点D作DF⊥AB于F，根据角平分线上的点到角的两边距离相等可得DE=DF，再根据S△ABC=S△ABD+S△BCD列出方程求解即可．本题考查了角平分线上的点到角的两边距离相等的性质，三角形的面积，熟记性质并作辅助线是解题的关键．16.【答案】解：∵AB∥CD，∠C=60°，∴∠B=180°-60°=120°，∴（5-2）×180°=x+150°+125°+60°+120°，∴x=85°.【解析】本题主要考查了平行线的性质和多边形的内角和，属于基础题.根据平行线的性质先求∠B的度数，再根据五边形的内角和公式求x的值.17.【答案】解：设AB=AC=2X，BC=Y，则AD=CD=X，∵AC上的中线BD将这个三角形的周长分成15和6两部分，∴有两种情况：①当3X=15，且X+Y=6，解得X=5，Y=1，∴三边长分别为10，10，1；②当X+Y=15且3X=6时，解得X=2，Y=13，此时腰为4，根据三角形三边关系，任意两边之和大于第三边，而4+4=8＜13，故这种情况不存在．∴腰长是10，底边长是1．【解析】设AB=AC=2X，BC=Y，则AD=CD=X，则有两种情况，根据等腰三角形的性质以及三角形三边关系解答．本题考查了等腰三角形和三角形三边关系求解，注意要分两种情况讨论是正确解答本题的关键．18.【答案】证明：∵BE=CF，∴BE+EC=CF+EC，即CB =FE，在△ABC和△DEF中，，∴△ABC≌△DEF（SSS），∴∠B=∠DEF，∠ACB=∠F，∴AB∥DE，AC∥DF．【解析】首先证明CB=FE，再加上条件AB=DE，AC=DF，可利用SSS判定△ABC≌△DEF，根据全等三角形的性质可得∠B=∠DEF，∠ACB=∠F，再根据同位角相等，两直线平行可得结论．此题主要考查了全等三角形的判定与性质，关键是熟练掌握三角形的判定定理：SSS、SAS、ASA、AAS．证明三角形全等必须有边相等的条件．19.【答案】证明：在△ABC和△DCB中∵，∴△ABC≌△DCB．∴∠A=∠D．又∵∠AOB=∠DOC，∴∠1=∠2．【解析】探究思路：因为△ABO与△DCO有一对对顶角，要证∠1=∠2，只要证明∠A=∠D，把问题转化为证明△ABC≌△DCB，再围绕全等找条件．本题是全等三角形的判定，性质的综合运用，可以由探究题目的结论出发，找全等三角形，再寻找判定全等的条件．20.【答案】解；（1）如图所示；（2）∵AD为△ABC的中线，BE为三角形ABD中线，∴S△ABD=S△ABC，S△BDE=S△ABD，∴S△BDE=S△ABC，∵△ABC的面积为60，BD=5，∴×5×EF=15，∴EF=6．【解析】（1）直接利用直角三角尺最值三角形的高；（2）利用三角形中线的性质得出S△BDE=S△ABC，进而借助三角形面积公式求出即可．是解题关键．21.【答案】如图，在△ABC和△DEF中，B、E、C、F在同一直线上，AB=DE，AC=DF，BE=CF∠ABC=∠DEF【解析】解：将①②④作为题设，③作为结论，可写出一个正确的命题，如下：已知：如图，在△ABC和△DEF中，B、E、C、F在同一直线上，AB=DE，AC=DF，BE=CF．求证：∠ABC=∠DEF．证明：在△ABC和△DEF中∵BE=CF∴BC=EF又∵AB=DE，AC=DF∴△ABC≌△DEF（SSS）∴∠ABC=∠DEF．将①③④作为题设，②作为结论，可写出一个正确的命题，如下：已知：如图，在△ABC和△DEF中，B、E、C、F在同一直线上，AB=DE，∠ABC=∠DEF，BE=CF．求证：AC=DF．证明：在△ABC和△DEF中∵BE=CF∴BC=EF又∵AB=DE，∠ABC=∠DEF∴△ABC≌△DEF（SAS）∴AC=DF；故答案为：如图，在△ABC和△DEF中，B、E、C、F在同一直线上，AB=DE，AC=DF，BE=CF；∠ABC=∠DEF．由BE=CF⇒BC=EF，所以，由1，2，4，可用SSS⇒△ABC≌△DEF⇒∠ABC=∠DEF；由1，3，4，可用SAS⇒△ABC≌△DEF⇒AC=DF；由于不存在ASS的证明全等三角形的方法，故由其它三个条件不能得到1或4．这是一道开放题．四个条件可组合成四个命题，其中有真有假，考生既要会证明真命题，还要会对假命题举反例加以否定，本题既考查了学生的基础知识，又考查了学生的创新能力．给学生提供了充分展示才能的空间，不同层次不同能力的学生可以给出不同的结果．22.【答案】解：(1).(a)∵∠ABC、∠ACB的平分线相交于点O，∴∠1=∠ABC，∠2=∠ACB，∴∠1+∠2=（∠ABC+∠ACB）=（180°-∠A）=×（180°-60°）=60°，∴∠BOC=180°-60°=120°；(b)90°+n°；(c)36°;(2)∵∠A'=40°，∴∠A'的外角等于180°-40°=140°，∵△A′B′C′另外的两外角平分线相交于点O′，三角形的外角和等于360°，∴∠1+∠2=×（360°-140°）=110°，∴∠B′O′C′=180°-110°=70°；(3)∵由（1）知，∠BOC=，由（2）知，∠B′O′C′=180°-，∴∠B′O′C′=180°-∠BOC．【解析】解：（1）（a）见答案；（b）∵∠ABC、∠ACB的平分线相交于点O，∴∠1=∠ABC，∠2=∠ACB，∴∠1+∠2=（∠ABC+∠ACB）=（180°-∠A）=×（180°-n°）=90°-n°，∴∠BOC=180°-（90°-n°）=90°+n°．故答案为：90°+n°；（c）∵∠ABC、∠ACB的平分线相交于点O，∠BOC=3∠A，∴∠1=∠ABC，∠2=∠ACB，∴∠1+∠2=（∠ABC+∠ACB）=（180°-∠A）=90°-∠A，∴90°-∠A+3∠A=180°，解得∠A=36°故答案为：36°；（2）见答案；（3）见答案．（1）（a）根据角平分线的定义可得∠1=∠ABC，∠2=∠ACB，然后求出∠1+∠2的值，再根据三角形的内角和等于180°可得出结论；（b）同（a）的证明过程；（c）根据角平分线的定义用∠A表示出∠1+∠2的值，再由∠BOC=3∠A即可得出结论；（2）先求出∠A的外角的度数，由三角形的外角和等于360°及角平分线的定义得出∠1+∠2的度数，再由三角形内角和定理即可得出结论；（3）根据（1）（2）中∠BOC与∠B′O′C′的关系可得出结论．本题考查的是三角形内角和定理，熟知三角形内角和是180°是解答此题的关键．23.【答案】解：（1）①△ADC≌△CEB．理由如下：：∵∠ACB=90°，∠ADC=90°，∠BEC=90°∴∠ACD+∠DAC=90°，∠ACD+∠BCE=90°，∴∠DAC=∠BCE，在△ADC与△BEC中，，∴△ADC≌△BEC（AAS）；②DE=CE+CD=AD+BE．理由如下：由①知，△ADC≌△BEC，∴AD=CE，BE=CD，∵DE=CE+CD，∴DE=AD+BE；（2）∵AD⊥MN于D，BE⊥MN于E．∴∠ADC=∠BEC=∠ACB=90°，∴∠CAD+∠ACD=90°，∠ACD+∠BCE=90°．∴∠CAD=∠BCE．在△ADC和△CEB中，∴△ADC≌△CEB．∴CE=AD，CD=BE．∴DE=CE-CD=AD-BE．（3）同（2），易证△ADC≌△CEB．∴AD=CE，BE=CD∵CE=CD-ED∴AD=BE-ED，即ED=BE-AD；当MN旋转到图3的位置时，AD、DE、BE所满足的等量关系是DE=BE-AD（或AD=BE-DE，BE=AD+DE等）．【解析】（1）证明△ADC≌△BEC（AAS）即可：已知已有两直角相等和AC=BC，再由同角的余角相等证明∠DAC=∠BCE即可；（2）根据垂直定义求出∠BEC=∠ACB=∠ADC，根据等式性质求出∠ACD=∠CBE，根据AAS证出△ADC和△CEB全等即可；（3）同样由三角形全等寻找边的关系，根据位置寻找和差的关系．本题考查了全等三角形的性质和判定，垂线的定义等知识点的应用，解此题的关键是推出证明△ADC和△CEB全等的三个条件．题型较好．。
江苏省赣榆县汇文双语学校2020学年八年级英语上学期第一次月考试题（无答案） 牛津版
江苏省赣榆县汇文双语学校2020学年八年级英语上学期第一次月考试题（无答案）牛津版Ⅰ、听力（计25分）第一部分听对话及问题，选择正确答案（共10小题，每小题1分，计10分）1. A. Outside the Children’s House. B. On a bus . C. At a bus stop.2. A. Five yuan. B. Fifteen yuan. C. Twelve yuan.3. A. Go out to dinner. B. Write a report. C. Go for a trip.4. A. She asked him not to read in the sun.B. She asked him what was wrong with him.C. She asked him not to read i n bed.5. A. It’s useful. B. It’s easy. C. It’s interesting.6. A. Mr. Smith. B. Helen. C. Mike’s father.7. A. Eggs. B. Bread. C. Dumplings.8. A. Two. B. Four. C. Thre e.9. A. The white box. B. The black box. C. The grey box.10. A worker. B. A teacher. C. A doctor.第二部分听对话回答问题（共5小题，每小题2分，计10分）你将听到两段对话，每段对话读两遍，听第一段对话完成第11-12题。
11. What did some other boys do at the beach?A. They sat there.B. They went boating.C. They watched the others.12. Did their teacher play with them?A. Yes, she did.B. No, she didn’t.C. She was at school.听第二段对话，完成第13~15题。
2020-2021年度上学期 扬州市江都区实验初级中学八年级上英语第一次月考(无答案)
八年级英语质量检测2020.9.29I听力.（每题1分，共20分）A．听对话回答问题本部分共有10道小题，每道小题你将听到一段对话，每段对话听两遍。
在听每段对话前，你将有5秒钟的时间阅读题目；听完后，你还有5秒钟的时间选择正确答案。
在听到嘀的信号后，进入下一小题。
( )1. Which animal does Mary like best?A. B. C.( )2. Where is Mr. Green going?A. B. C.( )3. Which kind of fruit is the cheapest?A. B. C.( )4. Who wants to know how to search the Internet?A. B. C.( )5. How many books does Sandy have?A. 5.B. 14.C. 19.1 / 9( )6. What kind of music does Sam like better?A . Rock music. B. American country music. C. Chinese pop music.( )7. How often does the girl go to the sports club?A. Once a week.B. Twice a week.C. Three times a week.( )8. When did Jim get to school this morning?A. At 7:00.B. At 7: 15.C. At 7:30.( )9. What is Millie’s school life like?A. It is interesting.B. It is busy.C. It is boring.( )10. Why can’t the girl watch the cartoons?A. Because her mother is working.B. Because her father is reading.C. Because her mother is sleeping.B.听对话和短文回答问题。