上海市闵行区梅陇中学2019-2020年沪教版(上海)七年级第二学期线上期中考试数学试卷(无答案)

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上海市闵行区2020学年七年级下学期期中数学试题(解析版)

2020年上海闵行区七年级第二学期期中考试数学试卷一、单项选择题1.在8-，3π，2.000100010000.13&&，139中有理数的个数是（）A. 2个B. 3个C. 4个D. 5个【答案】C 【解析】【分析】有理数分为整数和分数，根据有理数的定义判断．4==，139=有理数有：8,⋅⋅-，有4个，答案选C ．【点睛】掌握有理数的定义，带根号的数在判断的时候能化简的要先化简． 2.下列说法不正确的是( )A. 实数包括正实数、零、负实数B. 正整数和负整数统称为整数C. 无理数一定是无限小数D. 2是4的平方根.【答案】B 【解析】【分析】根据实数的概念解答即可．【详解】解：A 、实数包括正实数、零、负实数，正确； B 、正整数、0和负整数统称为整数，错误；C 、无限不循环小数叫做无理数，所以无理数一定是无限小数，正确；D 、2是4的平方根，正确；故选B ．【点睛】此题考查实数问题，关键是根据实数的概念解答． 3.下列计算中正确的是（）A. 222()-=- B. 255=±C.()233ππ-=- D. 13182-=【答案】D 【解析】【分析】根据算术平方根、立方根、分数指数幂进行判断即可．【详解】A ：()2-2=4=2，错误；B ：25=5，错误；C ：()2-3=-3=-3πππ，错误；D ：113-331118===882⎛⎫ ⎪⎝⎭，正确．所以答案选D ．【点睛】掌握算术平方根、立方根、分数指数幂的计算，注意符号的处理． 4.如图：150∠=︒，270??，360∠=︒，下列条件能得到//DE BC 的是（）A. 60B ∠=︒B. 60C ∠=°C. 70B ∠=︒D. 70C ∠=︒【答案】B 【解析】【分析】根据内错角相等，两直线平行，得到,B C ∠∠的度数，即可判断．【详解】∵150∠=︒，270??，360∠=︒∴要使//DE BC ，则=1=50B ∠∠︒或=3=60C ∠∠︒即可故选B ．【点睛】掌握平行线的判定方法：同位角相等、内错角相等、同旁内角互补均可． 5.如图，AB//CD ， EF ⊥BD 垂足为F ，∠1=40°，则∠2的度数为( )A. 30°B. 40°C. 50°D. 60°【答案】C 【解析】【分析】根据平行线的性质可得∠D 的度数，再根据直角三角形的两个锐角互余，可得∠2的度数．【详解】解：∵AB//CD ，∠1=40°， ∴∠D=∠1=40°，又∵EF ⊥BD ， ∴∠EFD=90°， ∴∠2=90°-∠1=50°，故答案为C ．【点睛】本题考查了平行线的性质，直角三角形的性质，解题的关键是掌握平行线的性质，直角三角形的两个锐角互余的性质． 6.如图，同位角共有（）A. 6对B. 5对C. 8对D. 7对【答案】A 【解析】【分析】根据同位角的特征，在截线的同侧，在被截线的位置一致，按照“F ”行特征进行选择即可.【详解】从图中可以看出同位角共有6对，分别是：4∠与7∠，3∠与8∠，1∠与7∠，5∠与6∠，2∠与9∠，1∠与3∠，故选A.【点睛】本题考查的是同位角的辨认，熟悉同位角的特征是解题的关键.二、填空题9_____．【答案】【解析】【分析】3=， ∴3的平方根是故答案为【点睛】此题考查了平方根，熟练掌握平方根定义是解本题的关键．8.计算：13(27)-=____________．【答案】-3 【解析】【分析】现将-27化为3(3)-，再根据幂的乘方运算法则，即可求解．【详解】11133333(27)(3)(3)3⨯⎡⎤-=-=-=-⎣⎦【点睛】本题考查了幂的乘方运算法则，底数不变，指数相乘．9.比较大小：-- 【答案】>【解析】【分析】因为是两个无理数比较大小，所以将根号外的数整理到根号内再进行比较；均是负数，绝对值大的反而小．【详解】∵-== ∴>-故答案为：>【点睛】将根号外数化到根号里再进行比较是解题关键． 10.化为幂的形式是_______．【答案】2-34【解析】【分析】利用立方根的意义以及分数指数幂的意义化简．【详解】2233 232311==4444-⎛⎫=⎪⎝⎭故答案为：234-【点睛】注意公式mn m na a=、()1ppa aa-⎛⎫=≠⎪⎝⎭的应用．11.2018年12月，华为轮值董事长郭平在新年致辞中指出“困难越大，荣耀也越大”．2018年公司预计实现销售收入1085亿美元，同比增长21%，请将1085亿保留三位有效数字为________．【答案】111.0910⨯【解析】【分析】先利用科学记数法表示，然后把亿位上的数字四舍五入即可．【详解】1085亿=108500000000=111.08510⨯，保留三位有效数字为：111.0910⨯故答案为：111.0910⨯【点睛】掌握科学记数法、有效数字的处理是解题关键．12.把一个长方形纸片按照如图所示的长方形折叠后，B的对应点B'，D的对应点C'，若得到50AOB'∠=︒，则DGO∠=_________．【答案】115︒【解析】【分析】根据平角的定义求出'BOB∠，根据折叠的性质求出BOG∠，再根据平行线的性质求DGO∠．【详解】∵50AOB'∠=︒∴'=180-50=130BOB ∠︒︒︒ 根据折叠'BOG B OG ∠=∠ ∴'1=130=652BOG B OG ∠=∠⨯︒︒ 又∵四边形ABCD 是长方形 ∴//AB CD∴180-18065115DGO BOG ∠=︒∠=︒-︒=︒ 故答案为：115︒【点睛】折叠的角度不变性是解决本题的关键．13.如果a a +1，那么整数a ＝_____．【答案】3 【解析】【分析】大小，再确定整数a 的值即可．<<34∴<,1a a <<+Q ,∴整数a=3．故答案是：3.【点睛】考查了估算无理数的大小，其常见的思维方法：用有理数逼近无理数，求无理数的近似值．14.如果实数A 点和B 点，则线段AB 的距离是________．【解析】【分析】根据数轴上两点间的距离，较大的数减去较小的数，可得答案．(∴线段AB【点睛】掌握数轴上两点间的距离公式是解决本题的关键．15.已知等腰三角形有两条边分别是3和7，则这个三角形的周长是_______. 【答案】17 【解析】【分析】根据等腰三角形的可得第三条边为3或7，再根据三角形的三边性质即可得出三边的长度，故可求出三角形的周长.【详解】依题意得第三条边为3或7，又3+3＜7，故第三条边不能为3，故三边长为3,7,7故周长为17.【点睛】此题主要考查等腰三角形的性质，解题的关键是熟知三角形的构成条件.16.如图：直线AB ，CD 相交于点O ，若13220∠=∠+︒，则直线AB 与CD 的夹角度数为________．【答案】40︒ 【解析】【分析】根据1,2∠∠是邻补角以及13220∠=∠+︒解出2∠即可．【详解】∵13220∠=∠+︒ 又∵1∠+∠︒2=180 ∴3220+2=180∠+︒∠︒ ∴=∠︒240则直线AB 与CD 的夹角度数为︒40．故答案为：40︒【点睛】掌握邻补角意义是解题关键．17.如图，已知//AB CD ，72A ∠=︒，58C ∠=︒，则E ∠=________．【答案】14︒ 【解析】【分析】利用两直线平行，同位角相等以及三角形的外角和定理计算即可．【详解】∵//AB CD ，72A ∠=︒,58C ∠=︒ ∴72DFE A ∠=∠=︒∴根据三角形外角定理725814E DFE C ∠=∠-∠=︒-︒=︒ 故答案为：14︒．【点睛】平行线的性质以及三角形的外角定理是解决本题的关键．18.如图，对面积为1的ABC ∆逐次进行操作：第一次操作，分别延长AB 、BC 、CA 至点1A 、1B 、1C ，使得12A B AB =，12B C BC =，12C A CA =，顺次连接1A 、1B 、1C ，得到111A B C ∆，记其面积为1S ；第二次操作，分别延长11A B 、11B C 、11C A 至点2A 、2B 、2C ，使得21112A B A B =、21112B C B C =、21112C A C A =，顺次连接2A 、2B 2C ，得到222A B C ∆，记其面积为2S ，L ，按此规律继续下去，可得到666A B C ∆，则其面积2S =________．【答案】361 【解析】【分析】根据三角形等高时底之比等于面积比得出1A BC ∆的面积为ABC ∆面积的两倍，则11A B C ∆的面积是1A BC ∆的2倍…，以此类推，得出222A B C ∆的面积．【详解】连接1A C ，1AB ,1BC ,根据12A B AB =，1A BC ∆的面积为ABC ∆的2倍，所以1A BC ∆的面积为2；同理11A B C ∆的面积为1A BC ∆的2倍，所以11A B C ∆的面积为4；以此类推：1ACB ∆的面积为2，11AC B ∆的面积为4，1ABC ∆的面积为2，11A BC ∆的面积为4∴111119A B C S ∆==，即111A B C ∆面积为ABC ∆面积的19倍，以此类推222A B C ∆的面积为ABC ∆面积的219倍，所以22222=191361A B C S ∆=⨯=．故答案为：361【点睛】利用三角形的底与高之间的数量关系判断面积的数量关系是解决本题的关键．三、简答题19.计算：1714)(1714) 【答案】3 【解析】【分析】利用平方差公式计算即可．【详解】根据()()22a b a b a b +-=- 计算：22-=17-14=3【点睛】熟练应用平方差公式．20.计算：20--+【答案】8π- 【解析】【分析】先计算分母有理化，负整数指数幂，零指数幂，二次根式的化简，然后计算加减法．【详解】解：原式214π=-+-2314π=--+-8π=-．【点睛】本题考查了实数的混合运算，熟记运算法则即可解答，属于基础题． 21.利用幂的运算性质进行计算：11232311222-⎛⎫⎛⎫-⨯-÷ ⎪⎪⎝⎭⎝⎭【答案】322【解析】【分析】根据分数指数幂、幂的乘方与积的乘方、同底数幂的除法的运算方法计算即可．【详解】11232311222-⎛⎫⎛⎫-⨯-÷ ⎪⎪⎝⎭⎝⎭()()1112233=-222-⨯-÷()11-23=-4-22⨯÷⎡⎤⎣⎦11-32=82÷()11-323=22÷32=2【点睛】注意分数指数幂、幂的乘方与积的乘方以及同底数幂的除法的灵活应用． 22.解方程：25(2)15x -=【答案】2 【解析】【分析】先两边都除以5，再开方，然后计算．【详解】∵25(2)15x -=∴2(2)3x -= ∴23x -=±∴23=±x【点睛】掌握开方，注意分类讨论以及符号的处理．四、简答题23.作图：如图已知△ABC ．（1）作出点A 到直线BC 的垂线段AD ；（2）作出点B 到直线AC 的垂线段BE ；（3）已知BC ＝6，AD ＝4，AC ＝8那么2BE ＝_____．【答案】（1）见解析；（2）见解析；（3）6【解析】【分析】（1）根据尺规作垂线的方法作图即可；（2）根据尺规作垂线的方法作图即可；（3）利用三角形的面积求出BE 即得结果.【详解】解：（1）线段AD 如图所示．（2）线段BE 如图所示．（3）∵S △ABC ＝12•BC •AD ＝12•AC •BE ， ∴BE ＝6438BC AD AC ⨯==g ，∴2BE ＝6．故答案为6．【点睛】本题考查了基本的尺规作图和利用三角形的面积求高的知识，熟练尺规作垂线的方法和步骤是作图的关键.24.如图，已知12∠=∠，34∠=∠，5A ∠=∠，试说明：//BE CF ．完善下面的解答过程，并填写理由或数学式．解：因为34∠=∠（已知）所以//AE __________．所以5EDC ∠=∠（_________________）．因为5A ∠=∠（已知）所以EDC ∠=_________．所以//DC AB ，所以5180ABC ∠+∠=︒（_______________．）即：532180∠+∠+∠=︒．因为12∠=∠（已知）所以531180∠+∠+∠=︒（___________________．）即：3180BCF ∠+∠=︒．所以//BE CF （_____________________．）【答案】BC ；两直线平行，内错角相等；A ∠；两直线平行，同旁内角互补；等量代换；同旁内角互补，两直线平行．【解析】【分析】先证明//AE BC ，再证//DC AB ，根据//DC AB 和角度的等量关系进行代换，得到//BE CF ．【详解】解：因为34∠=∠（已知）所以//AE BC ．所以5EDC ∠=∠（两直线平行，内错角相等）．因为5A ∠=∠（已知）所以EDC ∠=A ∠．所以//DC AB ，所以5180ABC ∠+∠=︒（两直线平行，同旁内角互补．）即：532180∠+∠+∠=︒．因为12∠=∠（已知）所以531180∠+∠+∠=︒（等量代换．）即：3180BCF ∠+∠=︒．所以//BE CF （同旁内角互补，两直线平行．）【点睛】掌握平行线的性质和判定是解决本题的关键．25.已知//AB CD ，GH 、MN 分别是AGF ∠、DME ∠的角平分线，求证：//GH MN ．【答案】见解析【解析】【分析】根据平行线的性质得出AGF DME ∠=∠,根据角平分线的定义得出1=2∠∠，从而判定//GH MN ．【详解】∵//AB CD∴AGF DME ∠=∠又∵GH 、MN 分别是AGF ∠、DME ∠的角平分线∴111=,222AGF DME ∠∠∠=∠ ∴1=2∠∠∴//GH MN （内错角相等，两直线平行）【点睛】掌握平行线的性质与判定以及角平分线的定义是本题解题的关键．五、综合题26.如图，直线AB ，CD 相交于点O ，OE ⊥AB ，OF ⊥CD.(1)若OC恰好是∠AOE的平分线，则OA是∠COF的平分线吗？请说明理由；(2)若∠EOF＝5∠BOD，求∠COE的度数．【答案】(1)OA是∠COF的平分线；（2）∠COE＝60°【解析】【分析】（1）利用角平分线的性质和垂直的定义易得∠AOC=12∠AOE=45°，再由OF⊥CD，可得∠COF=90°，易得∠AOF，由垂直的定义可得结论；（2）设∠AOC=x，易得∠BOD=x，可得∠COE=90°-x，∠EOF=180°-x，利用∠EOF=5∠BOD，解得x，可得∠COE．【详解】（1）OA是∠COF的平分线．∵OE⊥AB，∴∠AOE=90°，∵OC恰好是∠AOE的平分线，∴∠AOC=12∠AOE=45°，∵OF⊥CD，∴∠COF=90°，∴∠AOF=∠COF-∠AOC=90°-45°=45°，∴OA是∠COF的平分线；（2）设∠AOC=x，∴∠BOD=x，∵∠AOE=90°，∴∠COE=∠AOE-∠AOC=90°-x，∴∠EOF=∠COE+∠COF=90°-x+90°=180°-x，∵∠EOF=5∠BOD，∴180°-x=5x，解得x=30，∴∠COE=90°-30°=60°．【点睛】本题主要考查了角平分线的定义和垂直的定义，设∠AOC=x ，利用方程是解答此题的关键． 27.（1）在锐角ABC ∆中，AC 边上的高所在直线和AB 边上的高所在直线的交点为P ，110BPC ∠=︒，求A ∠的度数．（2）如图，AF 和CE 分别平分BAD ∠和BCD ∠，当点D 在直线AC 上时，100APC ∠=︒，则B ∠=_________．（3）在（2）的基础上，当点D 在直线AC 外时，如下图：130ADC ∠=︒，100APC ∠=︒，求B Ð的度数．【答案】（1）70︒；（2）20︒；（3）70︒．【解析】【分析】（1）根据对顶角相等以及四边形的内角和进行判断即可；（2）根据100APC ∠=︒以及AF 和CE 分别平分BAD ∠和BCD ∠，算出BAD ∠和BCD ∠,从而算出B Ð【详解】如图AC 边上的高所在直线和AB 边上的高所在直线的交点为P∴90BDA CEA ∠=∠=︒又∵110BPC ∠=︒∴110EPD BPC ∠=∠=︒∵在四边形AEPD 中，内角和为360︒∴=360-110-90-90=70A ∠︒︒︒︒︒（2）∵AF 和CE 分别平分BAD ∠和BCD ∠∴,BAP FAC BCE ACE ∠=∠∠=∠又∵100APC ∠=︒∴+18010080FAC ACE ∠∠=︒-︒=︒∴160BAC BCA ∠+∠=︒∴=180-160=20B 邪鞍（3）如图：连接AC∵130ADC ∠=︒，100APC ∠=︒∴18013050,18010080DAC DCA PAC PCA ∠+∠=︒-︒=︒∠+∠=︒-︒=︒ ∴2+3=30∠∠︒又∵AF 和CE 分别平分BAD ∠和BCD ∠∴1+4=2+3=30∠∠∠∠︒∴110BAC BCA ∠+∠=︒∴=180-110=70B 邪鞍【点睛】三角形的内角和定理以及角平分线的定义是解决本题的关键．。

上海版2019-2020学年七年级第二学期英语期中考试试卷(I)卷

上海版2019-2020学年七年级第二学期英语期中考试试卷（I）卷一、听小对话，回答问题。

（5分） (共5题；共5分)1. （1分）根据对话内容及问题，选择正确答案（）A . Last Thursday.B . Last Monday.C . Last Friday.2. （1分）What will the boy do on weekends?A . Take after-school classes.B . Watch a soap opera.C . Do the housework.3. （1分）听句子，选择你所听到的信息。

A . Mr. Liu speaks highly of me for my wonderful talent show.B . Mr. Liu spoke highly of me for my wonderful talent show.C . I am spoken highly of by Mr. Liu for my wonderful talent show.4. （1分）How does Kate feel about the chess club?A . Crowded.B . Helpful.C . Popular.5. （1分）What is the boy doing?A . Watching TV.B . Seeing a film.C . Playing games.二、听对话，回答问题。

（10分） (共2题；共10分)6. （4分）听下面一段对话，回答问题。

（1）What does Paul give to Tina?A . Some comedy books.B . Some cartoon books.C . Some Mickey Mouse toys.（2）Who is Tina's favorite cartoon character?A . Mickey.B . Snow White.C . Lion King.（3）What does Mickey look like?A . He has a small red nose.B . He has two small round ears.C . He has two large round ears.7. （6分）听下面一段对话，回答问题。

沪教版2019-2020学年七年级第二学期英语期中考试试卷(I)卷

沪教版2019-2020学年七年级第二学期英语期中考试试卷（I）卷一、听小对话，回答问题。

（5分） (共5题；共5分)1. （1分）What can the girl do?A . Tell stories in English.B . Write stories in English.C . Sing songs in English.2. （1分）Where is the woman's watch made?A . In China.B . In Thailand.C . In Germany.3. （1分）Where did the boy go last summer?A . Mount Tai.B . The Great Wall.C . The West Lake.4. （1分）Where did Mary buy the souvenir?A . At the aquarium.B . In a local shop.C . At the beach.5. （1分）What colour is the shirt?A . Red．B . Blue．C . Black．二、听对话，回答问题。

（10分） (共2题；共10分)6. （4分）听下面一段较长对话，回答问题。

（1）What's the relationship between the two speakers?A . Teacher and student.B . Mother and son.C . Friends.（2）How many tomatoes does he need?A . One.B . TwoC . Half a tomato.（3）How long does it take to make the beef and tomato noodles?A . About 5 minutes.B . About 10 minutes.C . About 15 minutes.7. （6分）听材料，回答问题。

上海版2019-2020学年七年级第二学期英语期中考试试卷A卷

上海版2019-2020学年七年级第二学期英语期中考试试卷A卷一、听小对话，回答问题。

（5分） (共5题；共5分)1. （1分）Listen to the dialogue and choose the best answer to the question you hear.A . Father.B . Mother.C . Penny.D . Daniel.2. （1分）How will the girl get to the science museum?A . On foot.B . By bus.C . By bike.3. （1分）听下面的对话，回答问题。

When did the fire in Notre Dame(巴黎圣母院) take place?A . On April 15thB . On April 14thC . On April 13th4. （1分）听下面的对话，回答问题。

What test did Eric have yesterday?A . ArtB . MathC . English5. （1分）Who usually goes to the movies on weekends?A . Billy.B . Jim.C . Jim's father.二、听对话，回答问题。

（10分） (共2题；共10分)6. （4分）听下面一段对话，回答问题.（1）What did Lingling do yesterday morning?A . She visited her father.B . She visited her grandmother.C . She visited her parents.（2）How did Lingling go to visit her grandmother?A . By bus.B . By bike.C . By taxi.（3）Which story does Lingling like best?A . Three Pigs.B . The Wolf Is Coming.C . Chang'e Flies to the Moon.7. （6分）听第6段对话，完成两个小题。

沪教版2019-2020学年七年级第二学期英语期中考试试卷A卷

沪教版2019-2020学年七年级第二学期英语期中考试试卷A卷一、听小对话，回答问题。

（5分） (共5题；共5分)1. （1分）Where did Jeff go on vacation?A . Visited his uncle.B . Stayed at home.C . Went to a summer camp.2. （1分）What's Mark's telephone number?A . 6711456.B . 6712456.C . 6611456.3. （1分）How many kilos of apples does the man want?A . 20B . 2C . 244. （1分）How was the weather in Sydney during the vacation?A . It was windyB . It was snowyC . It was sunny.5. （1分）Which subject did the boy do worst in?A . History.B . Science.C . English.二、听对话，回答问题。

（10分） (共2题；共10分)6. （4分）听下面一段对话，回答问题.（1）Can the man go with the woman?A . Yes, he can.B . No, he can't.C . It depends(看情况).（2）Who is ill?A . Jenny's aunt.B . Jenny's mother.C . Jackie's mother.（3）How will the woman go to New York'?A . By plane.B . By train.C . By car.7. （6分）听下面一段较长对话，回答问题。

沪教版2019-2020学年七年级第二学期英语期中考试试卷(II )卷

沪教版2019-2020学年七年级第二学期英语期中考试试卷（II ）卷一、听小对话，回答问题。

（5分） (共5题；共5分)1. （1分）What will Steve have?A . Pancakes.B . Green tea.C . Beef.2. （1分）What do we learn from the conversation?A . Henry doesn't like the color.B . Someone else painted the house.C . Henry painted the house himself.3. （1分）Who is answering the phone?A . Bob.B . Sam.C . Mary.4. （1分）What is the man trying to do?A . Make the woman try the ride.B . Offer help to the woman.C . Refuse the woman.5. （1分）What does Sam want to do-?A . To watch a movie.B . To play a game.C . To read a book.二、听对话，回答问题。

（10分） (共2题；共10分)6. （4分）听下面一段较长对话，回答问题。

（1）What's Helen's sister's favorite subject?A . Science.B . Music.C . Art.（2）Why does Helen like music?A . Because she thinks music is relaxing.B . Because her music teacher is old.C . Because her music teacher is nice.7. （6分）听下面一段对话，回答问题。

【3套打包】上海梅陇中学七年级下册数学期中考试题

人教版数学七年级下册期中考试试题(答案)一、选择题（本大题10小题，每小题3分，共30分。

每小题给出的四个选项中，只有一个选项是符合题意的，请将该选项的标号填入表格内）1.如图所示的车标，可以看作由“基本图案”经过平移得到的是（）A ．B ．C ．D ．2.下列各式中,正确的是( )A.±34B.34;C.±38±343.在实数5，227，38-， 0，-1.414，2π，36，0.1010010001中，无理数有（）A ．2个B ．3个C ．4个D ．5个4.在直角坐标系中，点P （-2，3）向右平移3个单位长度后的坐标为( )A ．（3，6） B. (1,6) C. (3,3) D. (1,3)5.如图，点E 在AC 的延长线上，下列条件中不能判断AC ∥BD 的是（）A. ∠3=∠4B. ∠D=∠DCEC. ∠1=∠2D. ∠D+∠ACD=180°6.下列命题是假命题的是（）A. 等角的补角相等B. 两直线平行，同旁内角相等C. 平行于同一条直线的两直线平行D. 同位角相等，两直线平行7.如图，在数轴上标注了四段范围，则表示8的点落在( )A ．段①B ．段②C ．段③D ．段④8．点P 位于x 轴下方，y 轴左侧，距离x 轴4个单位长度，距离y 轴2个单位长度，那么点P 的坐标是（）A.（4，2）B.（-2，-4）C.（-4，-2）D.（2，4）9. 如图所示，将含有30°角的三角板的直角顶点放在相互平行的两条直线其中一条上. 若∠1=35°，则∠2的度数为（）A. 10°B. 15°C. 25°D. 35°10. 在平面直角坐标系中，线段CF 是由线段AB 平移得到的；点A （-1，4）的对应点为C （4，1）；则点B （a ，b ）的对应点F 的坐标为（）A.（a+3，b+5）B.（a+5，b+3）C.（a-5，b+3）D.（a+5，b-3）二.填空题（共8小题，每小题3分，共24分）11.在同一平面内，两条直线有种位置关系，它们是 .12. 94 的算术平方根是，38- 的相反数是 ________；16的平方根是．13. 在平面直角坐标系中，点P （-2，3）在第_______象限，关于原点对称点坐标是 .14.如图所示，想在河的两岸搭建一座桥，搭建方式最短的是PM ，理由是．15.把命题“对顶角相等”改写成“如果……那么……”的形式是 .16.第四象限内的点P （x,y ）满足│x │=7,y 2=9,则点P 的坐标是 .17.已知x 、y 为实数，且 +（y+2）2=0，y x = . . 18.如图, 长方形ABCD 中, AB=3, BC=4, 则图中五个小长方形的周长之和为．三.画图题（满分6分）19. （6分）如图，∠BAC 是钝角。

沪教版2019-2020学年七年级下学期英语期中学业检测试卷A卷

沪教版2019-2020学年七年级下学期英语期中学业检测试卷A卷一、完形填空 (共1题；共10分)1. （10分）完形填空Hello! Look here! There's 1 apple tree behind Dick's house. Dick is near the tree. There are some apples 2 the tree. Dick is looking 3the apples. They are big and red. Dick is hungry. He wants to 4 an apple. Dick isn't tall. He is short. He can't reach(够到) the apples. He puts a 5 under the tree. Can he reach the apples on the box now?6, he can't. He is too7. Here comes Paul. He is Dick's brother. “Hello, Dick,8 do you want to do?”“Please help9, Paul. I can't 10 the apples.”“Here you are, Dick. One is for you, and one is for me!”“Thank you, Paul.”（1）A . aB . theC . someD . an（2）A . inB . onC . overD . under（3）A . forB . afterC . atD . up（4）A . seeB . buyC . get（5）A . ballB . boxC . boyD . bag （6）A . YesB . OKC . NoD . Not （7）A . longB . shortC . bigD . heavy （8）A . whatB . whenC . whereD . why （9）A . IB . meC . myD . you （10）A . reachB . seeD . Lost二、阅读理解 (共4题；共38分)2. （8分）阅读下列短文，从A、B、C、D四个选项中选出最佳选项。

沪教版2019-2020学年七年级第二学期英语期中考试试卷C卷

沪教版2019-2020学年七年级第二学期英语期中考试试卷C卷一、听小对话，回答问题。

（5分） (共5题；共5分)1. （1分）听简短对话和对话后的问题，选择最佳答案（）A . Chinese.B . English.C . French.2. （1分）What subject isn't Zhang Hai good at?A . Chinese.B . English.C . Math.3. （1分）What time is it now?A . 6：00.B . 6：30.C . 7：00.4. （1分）Who wasn't at school today?A . SoniaB . JimC . Tom5. （1分）请听对话和问题，选择正确的答案A . 33.B . 36.C . 63.二、听对话，回答问题。

（10分） (共2题；共10分)6. （4分）听对话，回答问题。

（1）What was Maria drawing when Mr. Wang came in?A . A monkey.B . A dog.C . A pig.（2）Where was John drawing a tiger?A . On the newspaper.B . On his book.C . On the blackboard.7. （6分）听第三段对话，选出两个问题的正确答案。

（1）What will Joey take to the party?A . Some photos.B . A camera.C . Some fruit.（2）Where does the woman invite the man to go?A . To go home.B . To go to school.C . To go to the surpermarket.三、听独白，回答问题（10分） (共1题；共10分)8. （10分）听短文，选择正确答案（1）What was Li Lei like in primary school?A . Shy and quiet.B . Clever and brave.C . Active and careful.（2）What was Li Lei afraid to do when she began learning English?A . To answer questions in class.B . To copy the texts before class.C . To do some writing after class.（3）When did Li Lei become interested in English?A . In middle school.B . In primary school.C . In senior high school.（4）What did Li Lei like doing best in her free time?A . Singing English songs.B . Watching English films.C . Reading English stories.（5）What does Li Lei want to do in the future?A . To teach English.B . To work in the USAC . To enter Cambridge University.四、完形填空（本题共计1小题，每题1分，共计10分） (共1题；共10分)9. （10分）阅读下面短文，掌握大意，然后从每题所给的A、B、C、D四个选项中选出最佳选项。

沪教版2019-2020学年七年级下学期英语期中段考试卷A卷

沪教版2019-2020学年七年级下学期英语期中段考试卷A卷一、单项选择。

(共10题；共20分)1. （2分）— ______ you ________ milk?— Yes, I do.A . Does; likesB . Does; likeC . Do; likeD . Do; likes2. （2分）—Look! There are two policemen.—Yeah. They're walking us.A . atB . towardsC . acrossD . up3. （2分）I forget to bring a pen. Would you lend me ?A . oneB . thatC . itD . this4. （2分）（2016·恩施）I ______ the whole afternoon in shopping a birthday present.A . spent; inB . paid; forC . spent; for5. （2分）It often _______ here in winter. Look! It's _______ again.A . snows; snowingB . snowy; snowingC . snow; snowyD . snowing; snows6. （2分）A: Why not take a map with you?B: I know that place well, so I won't ______.A . get upB . get lostC . get dressedD . get out7. （2分）—The bookshop __________ English dictionaries at a very good price.— Really? Let's buy some.A . buysB . sellsC . haveD . are8. （2分）It's our duty _______ our classroom clean and tidy.A . keepB . to keepC . keepingD . kept9. （2分）The Beijing roast duck smells ________.A . brightB . badlyC . niceD . well10. （2分）A refers to a kind of body language. People make it with their hands.A . noticeB . speechC . gesture二、完形填空。

2019-2020学年上海市梅陇中学七年级第二学期英语学科期中质量调研试卷(含答案)

2019学年梅陇中学七年级第二学期英语学科期中质量调研试卷(时间90分钟，满分100分)Class________Name________Number________Score________I. Listening Comprehension(听力理解) (共25分)A．Listenandchoosetherigh t picture（根据你听到的内容，选出相应的图片共) (共5分)B. Listen to the dialogue and choose the best answer to the question you hear (根据你听到的对话和问题，选出最恰当的答案) (共8分)6. A. In September. B. In October. C. In November D. In December.7. A. Water. B. Tea. C. Coffee. D. Coke.8. A. Rainy. B. Sunny. C. Windy. D. Cloudy.9. A. Interested. B. Excited. C. Angry. D. Sad.10. A. They are going to meet Jane’s uncle. B. They are going to school.C. They are going to see Tom’s uncle off.D. They are going to the airport.11. A. For a week. B. For this summer. C. For a month. D. For three weeks.12. A. At home. B. In the supermarket. C. In the hospital. D. In the department store.13. A. She doesn’t like the flower show. B. The flower show is boring.C. The flower show is wonderful.D. She missed the flower show.C. Listen to the passage and tell whether the following statements are true or false (判断下列句子是否符合你听到的短文内容, 符合的用“T”表示，不符合的用“F”表示) (共5分)14. Mr. Smith always went to work by taxi because he has a lot of money.15. Mr. Smith picked up a bag under a tree on his way to work.16. Mr. Smith lent the old man some money because he was Mr. Smith’s neighbour.17. The old man thanked Mr. Smith and took the money.18. Mr. Smith gave the money to the policeman at last.D. Listen to the passage/dialogue and complete the following sentences (听短文或对话，完成下列句子，每空格限填一词) (共5分)19. Beijing is really a great choice for you to ________ ________.20. In the north of Beijing, the Great Wall is a ________ ________ for you to visit.21. People built the Great Wall ________ ago.22. Tian’anmen Square is in ________ ________ of Beijing.Part 2 Phonetics, Vocabulary and Grammar(第二部分语音、词汇和语法)II. Choose the best answer(选择最恰当的答案) (共18分)23. Which of the following underlined parts is different in pronunciation from others?A. Who can tell me how to operate the machine?B. The lane is too narrow.C. How great Sheshan State Resort is!D. We can take the cable to the top of the mountain.24. I saw ________ action film with my friend yesterday, and ________ film was amazing.A. a...aB. a...theC. an...theD. an...a25. I think Game of Thrones is ________ TV series of the year.A. excitingB. more excitingC. most excitingD. the most exciting26. Shanghai is my hometown. It’s ________ of China.A. nearB. far away fromC. to the east ofD. in the east of27. -- Alice’s never late for school.-- ________.A. So am I.B. So was I.C. Neither am I.D. Neither have I.28. Shanghais is known ________ “the Oriental Pearl”, so many foreigners come to visit Shanghai very year.A. forB. asC. withD. about29. Mr. Smith and his family have ________ Bangkok for several days.A. arrived inB. been toC. gone toD. been in30. Hi, boys and girls. How are you ________ your posters for the coming English Festival at school?A. getting onB. getting offC. getting withD. getting31. -- ________ is the Shanghai Wild Animal Park?-- It’s 15km east of the Bund.A. WhoB. WhatC. WhenD. Where32. Turn right ________ Danba Road and walk ________ the road, then you will find Meilong Middle school.A. in...alongB. into...alongC. in...onD. into...on33. There will be a lot of activities at English Festival nest month. Which one would you like to ________?A. Take part inB. joinC. attendD. go34. Mum, let me help you with your housework, so you ________ do it yourself.A. don’t need toB. need toC. don’t needD. need35. ________ big furniture shop it is!A. HowB. WhatC. What aD. What an36. Who will ________ the Palace Museum after Shan Jixiang retires?A. in chargeB. in charge ofC. be in charge ofD. be in the charge of37. ________ it rains heavily outside, Lily wants to meet her children at once.A. IfB. AlthoughC. WhenD. Because.38. Builders have pulled down many old houses, and they will build a lot of new ________.A. onesB. oneC. the onesD. the one39. The restaurant ________ many complaints because of the terrible service since last month.A. receivesB. is receivingC. has receivedD. will receive40. -- Her daughter fell down from the bed and hurt her leg.-- ________.A. That’s not too bad.B. Really?C. That’s all right.D. I’m sorry to hear that.III. Complete the following passage with the words or expressions in the box. Each can only be used once (从方框内选出相应的词或词组) (共6分)The success of the film Youth(芳华)has made its lead actor Huang Xuan one of the ___41___ actors in China now, but he met many ___42___ before he became famous. He told himself not to give up. He kept improving his acting skills, and he always prepared ___43___ for his roles. In the film The Golden Era, Huang played an author. In order to better understand his role, he read all the works of the author. Huang’s efforts finally paid off. He became well-known for his performance in the film Blind Massage, which earned his more fans. Huang has never ___44___ improving his skills even after becoming famous. We really ___45___ seeing more works from such a hard-working actor.41. ________ 42. ________ 43. ________ 44. ________ 45. ________IV. Complete the sentences with the given words in their proper forms（用括号中所给单词的适当形式完成下列句子) (共6分)46. You can find plenty of ________ when you visit Europe. (church)47. This sweater is too tight for me. I need a ________ one. (loose)48. I think our school life is full of ________. (laugh)49. He couldn’t solve the problem by ________. Let’s help him. (he)50. My doctor has ________ that I should take action to lose weight because of my illness. (suggestion)51. Shanghai enjoys ________ fame(名声). Therefore, people from all over the world like to havea look at this city with their own eyes. (nation)V. Rewrite the following sentences as required (根据所给要求，改写下列句子, 每空格限填一词) (共10分)52. Tony has dinner with his family every day. (改为否定句)Tony ________ ________ with his family every day.53. Linda has been a cook since three years ago. (对划线部分提问)________ ________ has Linda been a cook?54. We use cotton to make clothes. (保持句意不变)Cotton is ________ ________ making clothes.55. Aunt Betty works in a company in Xujiahui. (改为反义疑问句)Aunt Betty works in a company in Xujiahui, ________ ________?56. which film, like, this Saturday, to see, you, would (连词成句)___________________________________________________________________________?Part 3 Reading and WritingVI. Reading comprehension(阅读理解)A. Choose the best answer(根据以下内容，选择最恰当的答案）（5分）Happiness is important to everyone. Most people want to be happy but few people know how to find happiness. Happiness depends on ourselves. In other words, we make our own happiness.Some people believe that if they are rich, they can do anything they want, and that means happiness. On the other hand, some people believe that holding a high place in the government is happiness. In this way, you have not only money, but also many other things. However, other people pay attention to their health. They think it can make them happy.Here are the ways to help you be happier.The secret of happiness is to enjoy the simple things in life. We shouldn’t spend too much time worrying about the future. For example, will I get a good job in the future? Instead, we should enjoy a simple life right now, such as reading a good book, listening to our favourite songs, or spending time with close friends. People who have close friends usually enjoy happier and healthier lives.The secret of happiness is also to be active. Many people go dancing or play sports. People can forget about their problems and only think an=bout the activities.Besides, many people find happiness is helping others. According to studies, people feel good when they volunteer their time to do many meaningful things for other people. If you want to feel happier, something nice for someone. You can help a friend with his or her studies, go shopping to get food for an old neighbour, or just help around the house.Now maybe you know how to find happiness!57. Some people who hold a high place in the government think they can ________.A. do everything they wantB. enjoy health, which makes them work hardC. take an active part in all kinds of activities every dayD. get money and something they can’t buy with money58. The writer shows us ________ ways to help people to be happier.A. oneB. twoC. threeD. four59. ________ is NOT the simple life you can enjoy.A. Reading a good bookB. Worrying about the futureC. Listening to one’s favourite musicD. Staying with close friends60. Many people find it happy to ________.A. go shopping to get some foodB. make much money and little progressC. remember the old days and troublesD. do some meaningful things for other people61. The passage mainly tell us ________.A. how to find happinessB. how to be healthyC. How to save happinessD. to do something good for other peopleB. Choose the best answer and complete the passage(选择最恰当的选项完成短文) (7分)Cartoon films have very few limits. If you can draw something, you can make it ___62___ on the cinema screen. The use of new ideas and modern computer programs means that cartoons are becoming exciting again for people of ___63___ ages.But in 1970s, the cinema world decided that cartoons ___64___ for children. However, soon after that, one or two films makers had some new ideas. They proved(证明) that it was ___65___ to make films in which both grow-ups and children could enjoy them.However, ___66___ cartoon films was good enough and successful. The Black Cauldron, for example, failed. It’s mainly because it was too ___67___ for children and too childish for grow-ups. Film makes learned from this mistake, and then cartoons were welcomed by both children and grow-ups and ___68___ the films companies began to make large mounts of money.62. A. arrive B. stay C. stand D. move63. A. some B. either C. all D. both64. A. never B. only C. still D. already65. A. possible B. difficult C. easy D. interesting66. A. not every B. none of the C. each D. neither of the67. A. interesting B. popular C. relaxing D. frightening68. A. once B. however C. again D. alsoC. Fill in the blanks with proper words (在短文的空格内填上适当的词，使其内容通顺。

上海市七年级第二学期数学期中模拟试卷(一)(解析版)

2019-2020学年第二学期七年级数学期中试卷【沪教版】（满分100分时间90分钟）题号一二三总分得分第Ⅰ卷（选择题）评卷人得分一、选择题（本大题共6小题，每题2分，满分12分）1.已知，三个实数a 、b 、c 在数轴上的点如图所示，||||||a b c a c b -+--+的值可能是（）A. B. 0； C. - 4； D. cba2.在实数13.1415,,,0,0.21211211123π-gL （每两个2之间依次增加一个1）这七个数中，无理数有（）A.2个；B.3个；C. 4个；D.5个. 3.下列说法正确的是（）= B.2a =； C.711=±； D. 2a =-4.同一平面内有三条直线a 、b 、c ，满足a//b ，b c ⊥，那么a 与c 的位置关系是（） A.垂直； B.平行； C. 相交但不垂直； D.不能确定.5.如图，下列四个选项中，12∠∠与不属于同位角的是（）C B A6.下列说法正确的是（）A.联结直线外一点与直线上点的所有线段中，垂线段最短；B.经过一点，有且只有一条直线与已知直线平行；C.两条直线被第三条直线所载，内错角相等；D.两个相等的角是对顶角.第Ⅱ卷（非选择题）评卷人得分二、填空题（本大题共12小题，每小题3分，满分36分） 7.259的平方根是 . 8.请写出一个比－4大的负无理数： . 9.求值：121516-⎛⎫⎪⎝⎭= . 10.已知3125m =-，则实数m= .11.表示成幂的形式是 . 12.计算：42(÷= .13.北京运动会以“和谐之旅”为主题开始进行全球范围内的火炬传递活动，火炬传递总里程大约为137000公里，请将这个数字用科学记数法表示 (精确到万位).14.已知数轴上点A 表示的数是1，点B 与点AB 所表示的数是 . 15.直线AB 与CD 相交于点O ，138AOD ∠=︒，则直线与CD 的夹角是． 16.如图，AB//CD ，CB 平分ACD ∠，110A ∠=︒，求ABC ∠= .DCBA17.如图，AD//BC ，AC 、BD 交于点E ，ABE ∆的面积等于2，CBE ∆的面积等于3，那么DBC ∆的面积等于 .EDC BA18.如图，a//b//c ，请写出BAD ABC BCD DAE DCF ∠∠∠∠∠、、、、存在的数量关系 .Fcb a EDCBA评卷人得分三、解答题（本大题共10题，第19~23题每题4分，第24、25题每题6分，第26题7分，第27题5分，第28题8分，满分52分） 19.计算：.20.21.计算：103227151294⎛⎫⎛⎫- ⎪ ⎪⎝⎭⎝⎭.22.计算：21123339322(5)5-÷⨯⨯（结果用幂的形式表示）.23.的整数部分为a ，小数部分为b ，求(4)b b +的值的a 次方根.24.按下列要求作图并填空：如图90A ∠=︒.（1）尺规作图：作BAC ∠的角平分线AH ，再作线段BC 的垂直平分线MN ，交BC 于点Q ，直线AH 与MN 交于点P ；（2）过点P 分别画出AB 、AC 的垂线，垂足分别是点E 、F ；（3）在（1）（2）的作完图后，图中一定平行的直线是 .（4）点P 到直线BC 的距离是线段的长度；点E 到直线AB 的距离是 .BA25.如图，如果12,34180∠=∠∠+∠=︒，说明56∠=∠的理由.（填写理由或步骤）解：因为12∠=∠（已知），所以AD//EF （）又因为34180∠+∠=︒（已知），所以AD//BC （）所以 // （）所以 = （）654321FED CBA26.如图，已知AB//CD ，12,34∠=∠∠=∠，请填写AD//BC 的理由. （填写理由或步骤）解：因为AB//CD （已知），所以4____∠=∠（）因为34∠=∠（已知），所以3____∠=∠（）因为12∠=∠（已知），所以12CAF CAF ∠+∠=∠+∠（）即BAF CAD ∠=∠，所以3____∠=∠，所以AD//BE （）4321FED CBA27.如图，已知BE 平分ABC ∠，DEB DBE ∠=∠，那么ADE ABC ∠∠和相等吗？为什么？EDCBA28.如图，将一副三角板中的两块直角三角尺的直角顶点按照如图的方式叠放在一起（其中60,30,45A B E F ∠=︒∠=︒∠=∠=︒）（1）若135ACF ∠=︒，则ECB ∠= . （2）试猜想ACF ECB ∠∠与的数量关系，并说明理由.（3）当180ACE ∠<︒，且点E 在直线AC 的上方时，这两块三角尺是否存在一组边互相平行？若存在，请直接写出ACE ∠角度的所有可能的值（不必说明理由）；若不存在，请说明理由.备用图2备用图3备用图1ABCABC ABCFE CBA2019-2020学年第二学期七年级数学期中模拟试卷（一）（满分100分时间90分钟）一、选择题（本大题共6小题，每题2分，满分12分）1.已知，三个实数a 、b 、c 在数轴上的点如图所示，||||||a b c a c b -+--+的值可能是（）A. B. 0； C. - 4； D. cba【答案】A ；【解析】由图可知，0,0,0,0a a b c a c b <-<->+>，所以原式=20b a c a c b a -+---=->，故答案选A.2.在实数13.1415,,,0,0.212112111233π-gL （每两个2之间依次增加一个1）这七个数中，无理数有（）A.2个；B.3个；C. 4个；D.5个. 【答案】B ；【解析】在这七个数中，无理数有：,0.21211211123πL （每两个2之间依次增加一个1）一共3个，故答案选B.3.下列说法正确的是（）= B. 2a =； C.711=±； D. 2a =-【答案】D ；【解析】A 不能合并，故A 错误；B 2||a =，故B 错误；C 711=，即求49121的算术平方根，故C 错误；D 2a ==-，故D 正确；因此答案选D. 4.同一平面内有三条直线a 、b 、c ，满足a//b ，b c ⊥，那么a 与c 的位置关系是（） A.垂直； B.平行； C. 相交但不垂直； D.不能确定. 【答案】A ；【解析】因为b c ⊥，所以b 与c 所成角为直角，可以根据两直线平行，同位角相等，所以直线a 与c 所成角也为直角，故a c ⊥，因此答案选A.5.如图，下列四个选项中，12∠∠与不属于同位角的是（）DC B A【答案】D ；【解析】在截线l 的同旁，又分别在直线a 、b 的相同一侧的一对角叫做同位角，根据此定义可知，A 、B 、C 中的12∠∠与属于同位角，而D 中的12∠∠与不属于同位角；故答案选D. 6.下列说法正确的是（）A.联结直线外一点与直线上点的所有线段中，垂线段最短；B.经过一点，有且只有一条直线与已知直线平行；C.两条直线被第三条直线所截，内错角相等；D.两个相等的角是对顶角. 【答案】A ；【解析】A 、联结直线外一点与直线上点的所有线段中，垂线段最短；故A 正确；B 、经过直线外一点，有且只有一条直线与已知直线平行；故B 错误；C 、两条平行直线被第三条直线所截，内错角相等；故C 错误；D 、因为一个角的两边是另一个角两边的反向延长线，这两个角互为对顶角，故两个相等的角不一定是对顶角；故D 错误；因此此题答案选A.二、填空题（本大题共12小题，每小题3分，满分36分）7.259的平方根是 . 【答案】53±；【解析】解：259的平方根是53=± 8.请写出一个比－4大的负无理数： . 【答案】π-；【解析】比-4大的负无理数不唯一，如：π-、. 9.求值：121516-⎛⎫⎪⎝⎭= . 【答案】49；【解析】解：原式=11122()1222819994164449--⨯--⎡⎤⎛⎫⎛⎫⎛⎫⎛⎫====⎢⎥ ⎪⎪ ⎪ ⎪⎝⎭⎝⎭⎝⎭⎝⎭⎢⎥⎣⎦.10.已知3125m =-，则实数m= . 【答案】5-；【解析】因为3125m =-，所以5m ==-.11.表示成幂的形式是 .【答案】532；【解析】532.12.计算：42(÷= .【答案】3；【解析】解：原式=424223-÷===.13.北京运动会以“和谐之旅”为主题开始进行全球范围内的火炬传递活动，火炬传递总里程大约为137000公里，请将这个数字用科学记数法表示 (精确到万位). 【答案】51.3710⨯；【解析】将这个数字137000用科学记数法表示为51.3710⨯.14.已知数轴上点A 表示的数是1，点B 与点AB 所表示的数是 .【答案】11；【解析】当点B 在点A 右侧时，点B表示的数为1+B 在点A 左侧时，点B表示的数为1故点B所表示的数为11-.15.直线AB 与CD 相交于点O ，138AOD ∠=︒，则直线AB 与CD 的夹角是．【答案】42︒；【解析】因为两条直线相交形成四个小于平角的角，其中不大于直角的角叫做两直线的夹角，故直线AB 与CD 的夹角是18013842︒-︒=︒.16.如图，AB//CD ，CB 平分ACD ∠，110A ∠=︒，求ABC ∠= .DCBA【答案】35︒；【解析】因为AB//CD ，所以180,A ACD ABC BCD ∠+∠=︒∠=∠，又CB 平分ACD ∠，所以2ACD BCD ∠=∠，因为110A ∠=︒，所以18011070ACD ∠=︒-︒=︒，所以1352BCD ACD ∠=∠=︒，故35ABC BCD ∠=∠=︒.17.如图，AD//BC ，AC 、BD 交于点E ，ABE ∆的面积等于2，CBE ∆的面积等于3，那么DBC ∆的面积等于 .EDC BA【答案】5；【解析】因为AD//BC ，所以点A 、点D 到BC 边的距离相等，由易知DBC ABC S S ∆∆=，所以235DBC S ∆=+=. 18.如图，a//b//c ，请写出BAD ABC BCD DAE DCF ∠∠∠∠∠、、、、存在的数量关系 .Fcb a EDCBA【答案】360BAD ABC BCD DAE DCF ∠+∠+∠+∠+∠=︒；【解析】因为a//b//c ，所以180,180BAE ABD BCF CBD ∠+∠=︒∠+∠=︒，所以BAE ABD ∠+∠+360BCF CBD ∠+∠=︒,即360BAD ABC BCD DAE DCF ∠+∠+∠+∠+∠=︒.三、解答题（本大题共10题，第19~23题每题4分，第24、25题每题6分，第26题7分，第27题5分，第28题8分，满分52分）19.计算：.【解析】解：原式==20.【答案】2；【解析】解：原式2=.21.计算：13227151294⎛⎫⎛⎫- ⎪ ⎪⎝⎭⎝⎭.【答案】1253；【解析】解：原式=123122245513⎛⎫⎛⎫⨯+- ⎪⎪ ⎪⎝⎭⎝⎭=12312224513⨯+⎛⎫+- ⎪⎝⎭=24513+-=1253.22.计算：21123339322(5)5-÷⨯⨯（结果用幂的形式表示）. 【答案】1310；【解析】解：原式=211221121111333933333333322552525(25)10-⨯--+÷⨯⨯=⨯=⨯=⨯=.23.的整数部分为a ，小数部分为b ，求(4)b b +的值的a 次方根.【答案】【解析】的整数部分为a ，小数部分为b ，又23<<，所以2,2a b ==，故2(4)2)2)4743b b +=⨯=-=-=，所以=(4)b b +的值的a 次方根即为3的平方根，故答案为24.按下列要求作图并填空：如图90A ∠=︒.（1）尺规作图：作BAC ∠的角平分线AH ，再作线段BC 的垂直平分线MN ，交BC 于点Q ，直线AH 与MN 交于点P ；（2）过点P 分别画出AB 、AC 的垂线，垂足分别是点E 、F ；（3）在（1）（2）的作完图后，图中一定平行的直线是 .（4）点P 到直线BC 的距离是线段的长度；点E 到直线AB 的距离是 .CBA【答案与解析】（1）用直尺与圆规作图，如下图所示. BAC ∠的角平分线AH 、线段BC 的垂直平分线MN 、点Q 、点P 为所作；（2）如图所示：,PE AB PF AC ⊥⊥，垂足分别为E 、F ；（3）PE//AC ，PF//AB ；（4）点P 到直线BC 的距离是线段PQ 的长度；点E 到直线AB 的距离是0.25.如图，如果12,34180∠=∠∠+∠=︒，说明56∠=∠的理由.（填写理由或步骤）解：因为12∠=∠（已知），所以AD//EF （）又因为34180∠+∠=︒（已知），所以AD//BC （）所以 // （）所以 = （）654321FED CBA【答案与解析】①内错角相等，两直线平行； ②同旁内角互补，两直线平行； ③EF//BC ；④平行的传递性； ⑤5=6∠∠； ⑥两直线平行，同位角相等.26.如图，已知AB//CD ，12,34∠=∠∠=∠，请填写AD//BC 的理由. （填写理由或步骤）解：因为AB//CD （已知），所以4____∠=∠（）因为34∠=∠（已知），所以3____∠=∠（）因为12∠=∠（已知），所以12CAF CAF ∠+∠=∠+∠（）即BAF CAD ∠=∠，所以3____∠=∠，所以AD//BE （）4321FED CBA【答案与解析】①BAE ∠；②两直线平行同位角相等；③BAE ∠；④等量代换；⑤等式性质；⑥CAD ∠；⑦内错角相等，两直线平行.27.如图，已知BE 平分ABC ∠，DEB DBE ∠=∠，那么ADE ABC ∠∠和相等吗？为什么？EDC BA【答案与解析】结论：ADE ABC ∠=∠. 因为BE 平分ABC ∠，所以CBE DBE ∠=∠（角平分线的意义），又因为DEB DBE ∠=∠，所以DEB CBE ∠=∠（等量代换），所以DE//BC （内错角相等，两直线平行），所以ADE ABC ∠=∠（两直线平行，同位角相等）.28.如图，将一副三角板中的两块直角三角尺的直角顶点按照如图的方式叠放在一起（其中60,30,45A B E F ∠=︒∠=︒∠=∠=︒）（1）若135ACF ∠=︒，则ECB ∠= . （2）试猜想ACF ECB ∠∠与的数量关系，并说明理由.（3）当180ACE ∠<︒，且点E 在直线AC 的上方时，这两块三角尺是否存在一组边互相平行？若存在，请直接写出ACE ∠角度的所有可能的值（不必说明理由）；若不存在，请说明理由.备用图2备用图3备用图1ABCABC ABCFE CBA【答案】（1）45︒；（2）180ACF ECB ∠+∠=︒；（3）①AB//CF ，30ACE ∠=︒；②EF//AC ，45ACE ∠=︒；③AB//CE ，120ACE ∠=︒；④BC//EF ，135ACE ∠=︒；⑤AB//EF ，165ACE ∠=︒.【解析】解：（1）由图可知：ECB ACB ECF ACF ∠=∠+∠-∠=90213545︒⨯-︒=︒；（2）猜想：180ACF ECB ∠+∠=︒. 因为ACF ACE ECF ∠=∠+∠，所以ACF ECB ACE ∠+∠=∠+ECF ECB ∠+∠=9090180ACB ECF ∠+∠=︒+︒=︒；（3）①如图1，AB//CF ，则180A ACF ∠+∠=︒，所以120ACF ∠=︒，所以1209030ACE ∠=︒-︒=︒；②如图2，EF//AC ，则45ACE CEF ∠=∠=︒；③如图3，AB//CE ，则180120ACE A ∠=︒-∠=︒；④如图4，BC//EF ，则45BCE E ∠=∠=︒，所以9045135ACE ∠=︒+︒=︒；⑤如图5，AB//EF ，延长AC 交EF 于点D ，则180120CDE A ∠=︒-∠=︒，所以ACE CDE E ∠=∠+∠12045165=︒+︒=︒.D图5图4图3图2图1EACFBEAC FBEACFBEAC FBFEC BA。

沪教版2019-2020学年七年级下学期英语期中质量检测试卷(I)卷

沪教版2019-2020学年七年级下学期英语期中质量检测试卷（I）卷一、听音辨图。

听句子，选择与你所听到的句子内容相符的图画（每小题 (共1题；共4分)1. （4分）What does Tom like doing in his free time?A .B .C .二、情景反应。

听句子，选择恰当的答语。

（每小题1分，共6分） (共6题；共6分)2. （1分）听录音，从题中所给的 A、B、C 三个选项中选出最佳选项（）A . How are you?B . Good morning.C . Nice to meet you!3. （1分）听句子，选择最佳应答语A . Making a kite.B . From the US.C . They're students.4. （1分）听句子，选出该句的最佳答语（）A . That's early.B . That's all right.C . That's fun.5. （1分）根据所听句子的内容，选择最佳应答语（）A . It's green.B . It's nice.C . It's a jacket.6. （1分）听句子，选择最佳应答语A . I eat it every day.B . It's in the box.C . It's delicious.7. （1分）听句子，选出最佳答语。

A . Speaking.B . You're welcome.C . She's talking.三、对话理解。

听五组短对话和五个问题，选择正确的答案。

（每小题1 (共5题；共5分)8. （1分）What colour is Betty's watch？A . Blue.B . Red.C . Green.9. （1分）How was the weather in Sydney during the vacation?A . It was windyB . It was snowyC . It was sunny.10. （1分）What does the man think of the film?A . He does not like it.B . It is interesting.C . He likes it very much.11. （1分）What does the girl think of Chinese?A . Hard.B . Interesting.C . Easy.12. （1分）What does Wei Fang think is the most useful invention?A . The TV.B . The mobile phone.C . The computer.四、语篇理解。

上海市梅陇中学2019-2020学年七年级下学期中英语试题

一、单选题上海市梅陇中学2019-2020学年七年级下学期中英语试题上海初一期中2020-05-07105次1. Which of the following underlined parts is different in pronunciation from others?A．Who can tell me how to operate the machine?B．The lane is too narrow.C．How great Sheshan State Resort is!D．We can take the cable to the top of the mountain.2. I saw ________ action film with my friend yesterday, and ________ film was amazing.A．a...a B．a...the C．an...the D．an...a3. I think Game of Thrones is ________ TV series of the year.A．exciting B．more exciting C．most exciting D．the most exciting4. Shanghai is my hometown. It’s ________ China.A．near B．far away from C．to the east of D．in the east of5. — Alice’s never late for school.— ________.A．So am I.B．So was I.C．Neither am I.D．Neither have I.6. Shanghais is known ________ “the Oriental Pearl”, so many foreigners come to visit Shanghai very year.A．for B．as C．with D．about7. Mr. Smith and his family have ________ Bangkok for several days.A．arrived in B．been to C．gone to D．been in8. Hi, boys and girls. How are you ________ your posters for the coming English Festival at school?A．getting on B．getting off C．getting with D．getting9. — ________ is the Shanghai Wild Animal Park?— It’s 15km east of the Bund.A．Who B．What C．When D．Where10. Turn right ________ Danba Road and walk ________ the road, then you will find Meilong Middle school.A．in...along B．into...along C．in...on D．into...on11. There will be a lot of activities at English Festival nest month. Which one would you like to ________?A．take part in B．join C．attend D．go12. Mum, let me help you with your housework, so you ________ do it yourself.A．don’t need to B．need to C．don’t need D．need13. ________ big furniture shop it is!A．How B．What C．What a D．What an14. Who will ________ the Palace Museum after Shan Jixiang retires?A．in charge B．in charge of C．be in charge of D．be in the charge of15. ________ it rains heavily outside, Lily wants to meet her children at once.A．If B．Although C．When D．Because.16. Builders have pulled down many old houses, and they will build a lot of new ________.A．ones B．one C．the ones D．the one17. The restaurant ________ many complaints because of the terrible service since last month.A．receives B．is receiving C．has received D．will receive18. — Her daughter fell down from the bed and hurt her leg.— ________.A．That’s not too bad.B．Really?C．That’s all right.D．I’m sorry to hear that.二、用单词的正确形式完成短文三、用所给单词的正确形式填空四、改写句子20. You can find plenty of ________ when you visit Europe. (church)21. This sweater is too tight for me. I need a ________ one. (loose)22. I think our school life is full of ________. (laugh)23. He couldn’t solve the problem by ________. Let’s help him. (he)24. My doctor has ________ that I should take action to lose weight because of my illness. (suggestion)25. Shanghai enjoys ________ fame(名声). Therefore, people from all over the world like to have a look at this city with their own eyes. (nation)us. We really 【小题5】seeing more works from such a hard-working actor.own for his performance in the film Blind Massage, which earned his more fans. Huang has never 【小题4】improving his skills even after becoming famo n Era , Huang played an author. In order to better understand his role, he read all the works of the author. Huang’s efforts finally paid off. He became well-kn e became famous. He told himself not to give up. He kept improving his acting skills, and he always prepared 【小题3】for his roles. In the film The Golde The success of the film Youth (芳华)has madeits lead actor Huang Xuan one of the 【小题1】actors in China now, but he met many 【小题2】before h . carefully B. hottest C. look forward to D. stopped E. difficulties F. chancesA 9. Complete the following passage with the words or expressions in the box. Each can only be used once (从方框内选出相应的词或词组)1五、划线部分提问六、同义句转化七、将所给单词连成句子八、阅读单选27. Aunt Betty works in a company in Xujiahui. (改为反义疑问句)Aunt Betty works in a company in Xujiahui, ________ ________?28. Linda has been a cook since three years ago. (对划线部分提问)________ ________ has Linda been a cook?29. We use cotton to make clothes. (保持句意不变)Cotton is ________ ________ making clothes.30. which film, like, this Saturday, to see, you, would (连词成句)___________________________________________________________________________?31. Happiness is important to everyone. Most people want to be happy but few people know how to find happiness. Happiness depends on ourselves.In other words, we make our own happiness.Some people believe that if they are rich, they can do anything they want, and that means happiness. On the other hand, some people believe that holdi ng a high place in the government is happiness. In this way, you have not only money, but also many other things. However, other people pay attention to th eir health. They think it can make them happy.Here are the ways to help you be happier.Tony ________ ________ with his family every day.Tony has dinner with his family every day. (改为否定句)26.The secret of happiness is to enjoy the simple things in life. We shouldn’t spend too much time worrying about the future. For example, will I get a goo d job in the future? Instead, we should enjoy a simple life right now, such as reading a good book, listening to our favourite songs, or spending time with clo se friends. People who have close friends usually enjoy happier and healthier lives.The secret of happiness is also to be active. Many people go dancing or play sports. People can forget about their problems and only think about the act ivities.Besides, many people find happiness is helping others. According to studies, people feel good when they volunteer their time to do many meaningful th ings for other people. If you want to feel happier, something nice for someone. You can help a friend with his or her studies, go shopping to get food for an o ld neighbour, or just help around the house.Now maybe you know how to find happiness!【小题1】Some people who hold a high place in the government think they can ________.A．do everything they wantB．enjoy health, which makes them work hardC．take an active part in all kinds of activities every dayD．get money and something they can’t buy with money【小题2】The writer shows us ________ ways to help people to be happier.A．one B．two C．three D．four【小题3】________ is NOT the simple life you can enjoy.A．Reading a good book B．Worrying about the futureC．Listening to one’s favourite music D．Staying with close friends【小题4】Many people find it happy to ________.A．go shopping to get some food B．make much money and little progressC．remember the old days and troubles D．do some meaningful things for other people【小题5】The passage mainly tell us ________.A．how to find happiness B．how to be healthyC．How to save happiness D．to do something good for other people九、完型填空32. Cartoon films have very few limits. If you can draw something, you can make it__________ on the cinema screen. The use of new ideas and mod ern computer programs means that cartoons are becoming exciting again for people of__________ ages.But in 1970s, the cinema world decided that cartoons _________ for children. However, soon after that, one or two films makers had some new ideas. They proved(证明) that it was ___________ to make films in which both grow-ups and children could enjoy them.However,_________ cartoon films was good enough and successful. The Black Cauldron, for example, failed. It’s mainly because it was too ________ for children and too childish for grow-ups. Film makes learned from this mistake, and then cartoons were welcomed by both children and grow-ups and ___ _______ the films companies began to make large mounts of money.【小题1】A．arrive B．stay C．stand D．move【小题2】A．some B．either C．all D．both【小题3】A．never B．only C．still D．already【小题4】A．possible B．difficult C．easy D．interesting【小题5】A．not every B．none of the C．each D．neither of the【小题6】A．interesting B．popular C．relaxing D．frightening【小题7】A．once B．however C．again D．also十、单词填空33. C. Fill in the blanks with proper words (在短文的空格内填上适当的词，使其内容通顺。

上海市闵行区2020学年沪教版(上海)七年级第二学期线上期中考试数学试卷(无答案)

a 2 81 4 (-a )3 上海市七年级数学期中考试卷班级姓名学号一、选择题（每题 2 分，共 16 分）1、与数轴上的点成一一对应关系的数是………………………………………………（）A .有理数B .整数C .无理数D .实数2、如果 3x - 5 有意义，则x 可以取的最小整数为…………………………（）A ．0B ．1C ．2D ．33、“1949 年，上海人口为 520 万，至 2004 年末，全市户籍人口已增加到 1352.92 万，占全国总人口的 1%”，对这段话中的数据判断，正确的是…………………………（） A 、520 万是近似数，精确到万位，它有 2 个有效数字 B 、1352.90 万是近似数，精确到万位 C 、1%是近似数，它有一个有效数字D 、1352.92 万是近似数，精确到百万位应该是 1400 万4、以下列三条线段为边，不能组成三角形的是（） A . 3，4，5 B . m +1，m +2，m +3（m >0） C .三条线段之比为 4：3：2D .1 , 1 , 12 4 55、三角形三个外角的比为 2：3：4，则对应的三个内角之比为 ……………………（）A . 2:3:4B .4:3:2C .5:3:1D .1:3:5 6、已知下列说法中：① 3 是 9 的平方根；②无理数包括正无理数、零、负无理数； ③三角形的三个内角中，最少有一个角不小于 60°； ④两条直线被第三条直线所截，同位角相等；⑤有两边及其中一边的对角对应相等的两个三角形全等. 说法不．正．确．的有…………………………………………………………………………（）A . 1 个B . 2 个C .3 个D . 4 个7、已知：AB =A ′B ′，∠A =∠A ′，若再增加下列各条件之一后，仍不能使得△ABC ≌△A ′B ′C ′的是（） A . BC =B ′C ′ B . AC =A ′C ′C . ∠B =∠B ′D . ∠C =∠C ′8、若 a 与它的绝对值之和为 0，则 - 的值是….（）A ．－1B ．1C ．2a -1D ．1-2a二、填空题（每空两分，共 40 分）9、的平方根.10、把写成分数指数幂的形式.（a -1)25 6 11 70530 AD1a CBb（图 2）图 32图 4 图 5图 611、若 = x ，则x = .112、计算： 42= .如果 3(x +1)2=9，那么 x=.13、比较大小： - 2-16；14、计算 5 ⨯ 3 ÷= .15、已知 a 、b 分别是6 - 的整数部分和小数部分，则 ab = .16、用科学记数法表示 2020≈（保留 2 个有效数字）.17、不等式( - 3)x > 3 -的解集是.18、已知： ≈ 2.656, ≈ 8.398, 那么 ≈ .19、在数轴上，如果点 A 、点 B 所对应的分别为- AB =．2 、 2 ，那么 A 、B 两点的距离20、若 x - 2 + =0，则 x ＋y 的立方根是．21、两条相交直线所形成的一个角为150︒ ，那么它们的夹角是 . 22、如图 2，AC ⊥BC ，CD ⊥AB ，点 B 到 CD 边的距离是线段的长．23．如图 3，直线 MN 、PQ 相交于点 O ，∠1︰∠2＝2︰3，∠NOP ＝130°，则∠2＝．24．如图 4，已知 a // b ， ∠1 = ( 3x - 7 )︒， ∠2 = (2x +15)︒ ，则 x =．25．如图 5，∠1＝∠2，∠DAB ＝80º，则∠B ＝度．26．如图 6，将一张长方形纸片的一角斜折过去，顶点 A 落在 A ′处，BC 为折痕，再将 BE 翻折过去与 BA ′重合，BD 为折痕，那么两条折痕的夹角∠CBD ＝度．27、如图 7，AD ∥BC 且 AD ≠BC ，AC 与 BD 相交于点 O ， S 1 , S 2 , S 3 , S 4 分别是 △ABO 、△BCO 、△CDO 、△AOD 的面积，则一定有（填序号）① S 1 = S 2 ,② S 1 = S 3 ,③ S 1 + S 2 = S 3 + S 4 ,④ S 1 ⋅ S 3 = S 2 ⋅ S 4 .三、简答题（每题 4 分，共 16 分）x 23 53 3 7.053 70.53 2 6 + 2 y 图 728、计算：32√5−54√5−14√5− 52√529、计算(√32)3×√3−√10×√7÷2√10÷√730、利用幂的性质进行计算32×√335√3×√3710⋅×√9531、已知2a-3 与a-3 是某数的平方根，求这个数.四、画图回答问题（6 分）32、（1）用尺规作∠ABC 的平分线BD；（2）在 BA 上任找一点 E（不与 B 点重合），过点 E 画 BC 的平行线 EF，交 BD 与点 F;（3）过点F 画FH ⊥BC ,垂足为点H;（4）点B 到直线FH 的距离是线段的长度；（5）如果BH : EF = 3 : 2 ，且∆BFH 的面积比∆EBF 的面积大5，那么∆BFH 的面积为.五、说理填空题（每空1分，共12分）33、如图所示，已知：AB、EF 相交于点D，CD⊥AB，∠1=60º，求：∠BDF 的大小.解：因为CD⊥AB（已知），所以∠ADC=°（），因为∠ADF=∠ADC+∠1（已知），且∠1=60º（已知），所以∠ADF=°（等式性质），又因为∠ADF+∠=180°（），所以∠BDF= °（等式性质）.34、如图，点P 在CD 上，已知∠BAP+∠APD=180°，∠1=∠2，请说明∠E=∠F 的理由. 解：因为∠BAP+∠APD=180°（），∠APC+∠APD=180°（），所以∠BAP=∠APC（），又∠1=∠2，得∠BAP-∠1=∠APC-∠2，即.（请完成以下说理过程）六、解答题（4 分+6 分=10 分）35、如图，AE、CE 分别平分∠BAC、∠ACD 且∠1+∠2=90°，试说明AB∥CD 的理由.36、如图，AD=BC,AB=CD,试判断AB 与CD 的位置关系，并说明理由.。

上海市闵行区梅陇中学2022-2023学年七年级上学期期中考试数学试卷(含答案)

2022-2023学年上海市闵行区梅陇中学七年级（上）期中数学试卷一、选择题（本大题共6题，每题2分，满分12分）1．下列是单项式的是（）A．x+1＝0B．2a C．D．+3n2．下列各等式中，从左到右的变形是因式分解的是（）A．150＝2×3×5×5B．2x（x+1）＝2x2+2xC．（ma+mb）÷m＝a+b D．a2﹣3a+2＝（a﹣2）（a﹣1）3．多项式4xy4﹣3xy3+x2y是（）A．三次三项式B．四次三项式C．五次三项式D．四次四项式4．在下列运算中，计算正确的是（）A．（﹣x3y）2＝x6y2B．x3•x3＝x9C．x2+x2＝x4D．2x6÷x2＝2x35．若多项式4x2+mxy+9y2是完全平方式，则m的值为（）A．6或﹣6B．12或﹣12C．12D．﹣126．设P、Q都是关于x的四次多项式，下列判断一定正确的是（）A．P+Q是关于x的四次多项式B．P+Q是关于x的八次多项式C．P•Q是关于x的四次多项式D．P•Q是关于x的八次多项式二、填空题（本大题共12题，每题3分，满分36分）7．用代数式表示“a的平方减去b的差”．8．计算：5ab﹣4ab＝．9．把多项式3x2y﹣6xy2+4x3y3﹣1按字母x进行降幂排列．10．计算：4x4÷6x＝．11．当x＝﹣时，代数式x2+1的值是．12．计算：结果用幂的形式表示（a﹣b）9÷（b﹣a）4＝．13．因式分解：x2﹣5x﹣24＝．14．若﹣3x4y3b与4x2a y9是同类项，则a+b＝．15．已知a m＝2，a2n＝3，求a m+2n＝．16．若（x+y﹣4）2+（x﹣y+7）2＝0，则x2﹣y2＝．17．已知a2﹣a﹣1＝0，则代数式a3﹣2a+6＝．18．已知a，b，c是三个连续的正整数，a2＝33124，c2＝33856，那么b2＝．三、简答题（本大题共7题，每题4分，满分28分）19．计算：2a2b•5ab2﹣3ab•（ab）2．20．计算：（﹣2xy）•（x2+xy﹣y2）．21．（a+b﹣c）（a﹣b+c）22．计算：（3x2y2﹣xy2）÷xy•（3x+1）．23．因式分解：9a3b2﹣15a2b3+6a2b4．24．因式分解：a2﹣6ab+9b2﹣16．25．因式分解：x2+9xy+18y2﹣3x﹣9y．四、解答题（本大题共4题，每题6分，共24分）26．先化简，再求值：[（ab+1）（ab﹣2）﹣2a2b2+2]÷（﹣ab），其中，a＝．27．已知：整式A＝x2+xy﹣5y2，B＝x2﹣xy﹣y2，且整式C＝2A﹣3B，试求出整式C，并计算当x＝时C的值．28．如图，图①是一个长为2n、宽为2m的长方形，沿图中虚线用剪刀平均分成四块小长方形（1）图②中拼成的大正方形的面积为；（2）图②中的阴影部分的面积为；（3）若已知图②中拼成的大正方形的周长为28，阴影部分的周长为20，则图①中平均分成的每个小长方形的面积是．29．阅读下列材料，并解决问题．材料：两个正整数相除时，不一定都能整除，当不能整除时（0≤余数＜除数）．类似的，关于x的多项式A（x）（x）时，一定存在一对多项式g（x）、r（x）（x）＝B（x）•g（x）（x），其中余式r（x）的次数小于除式B（x）例如：多项式x2+x+5除以多项式x+2，商为x﹣1，余式数为72+x+5＝（x+2）（x﹣1）+7．又如：多项式x2+5x+6除以多项式x+2，商为x+3，余式数为02+5x+6＝（x+2）（x+3），此时，多项式x2+5x+6能被多项式x+2整除．问题：（1）多项式x2+2x﹣8除以多项式x﹣2，所得的商为．（2）多项式x2+7x+8除以多项式x+1，所得的余式数为2，则商为．（3）多项式2x3+ax2+bx﹣6分别能被x﹣1和x﹣2整除，则多项式2x3+ax2+bx﹣6除以（x﹣1）（x﹣2）的商为．参考答案与试题解析1．【解答】解：A、x+1＝0不符合单项的定义，不合题意；B、7a符合单项的定义，符合题意；C、不符合单项的定义，不合题意；D、+4n不符合单项的定义，不合题意；故选：B．2．【解答】解：A．150＝2×3×8×5，不属于因式分解；B．2x（x+3）＝2x2+5x，从左至右的变形属于整式乘法，故本选项不符合题意；C．（ma+mb）÷m＝a+b，不属于因式分解；D．a2﹣3a+8＝（a﹣2）（a﹣1），从左至右的变形属于因式分解；故选：D．3．【解答】解：∵多项式4xy4﹣8xy3+x2y含有7xy4，3xy6，x2y三项，且4xy8的次数是5，3xy2的次数是4，x2y的次数是6，∴多项式4xy4﹣4xy3+x2y是五次三项式，故选：C．4．【解答】解：（﹣x3y）2＝x4y2，故A正确，符合题意；x3•x2＝x6，故B错误，不符合题意；x2+x5＝2x2，故B错误，不符合题意；6x6÷x2＝7x4，故B错误，不符合题意；故选：A．5．【解答】解：∵4x2+mxy+3y2是完全平方式，∴（2x）3±2•2x•3y+（3y）2∴mxy＝±12xy，m＝±12，故选：B．6．【解答】解：A、若P，则P+Q的次数为不高于四次．B、若P，则P+Q的次数为不高于四次．C、若P，则P•Q的次数为八次．D、若P，则P•Q是关于x的八次多项式．故选：D．7．【解答】解：“a的平方减去b的差”用代数式表示为：a2﹣b，故答案为：a2﹣b．8．【解答】解：5ab﹣4ab＝ab．故答案为：ab．9．【解答】解：把多项式3x2y﹣4xy2+4x3y3﹣1按字母x进行降幂排列为：7x3y3+3x2y﹣6xy8﹣1，故答案为：4x6y3+3x4y﹣6xy2﹣5．10．【解答】解：4x4÷7x＝x8．故答案为：x4．11．【解答】解：当x＝﹣时，原式＝，故答案为：1．12．【解答】解：（a﹣b）9÷（b﹣a）4＝（a﹣b）5÷（a﹣b）4＝（a﹣b）5．故答案为：（a﹣b）5．13．【解答】解：x2﹣5x﹣24＝（x﹣8）（x+3），故答案为：（x﹣8）（x+8），14．【解答】解：∵﹣3x4y6b与4x2a y5是同类项，∴2a＝4，7b＝9，解得a＝2，b＝6，∴a+b＝2+3＝8．故答案为：5．15．【解答】解：∵a m＝2，a2n＝2，∴a m+2n＝a m•a2n＝2×3＝6．故答案为：6．16．【解答】解：∵（x+y﹣4）2+（x﹣y+2）2＝0，∴x+y﹣5＝0且x﹣y+7＝3，∴x+y＝4，x﹣y＝﹣7，∴x5﹣y2＝（x+y）（x﹣y）＝4×（﹣5）＝﹣28，故答案为：﹣28．17．【解答】解：∵a2﹣a﹣1＝7，∴a2﹣a＝1，a2﹣2a+6＝a（a2﹣a）+a5﹣2a+6＝a+a8﹣2a+6＝a6﹣a+6，将a2﹣a＝5代入原式＝1+6＝8．故答案为：7．18．【解答】解：c2﹣a2＝（c+a）（c﹣a）＝33856﹣33124＝732，∵a、b、c是三个连续正整数，∴c﹣a＝8，∴c+a＝366，∴c＝184，∴b＝183，∴b2＝33489．故答案为：33489．19．【解答】解：原式＝10a3b3﹣5ab•a2b2＝10a8b3﹣3a3b3＝7a2b3．20．【解答】解：（﹣2xy）•（x2+xy﹣y2）＝﹣2xy•x2﹣8xy•xy+2xy•y2＝﹣3x4y﹣2x2y3+xy6．21．【解答】解：（a+b﹣c）（a﹣b+c）＝[a+（b﹣c）][a﹣（b﹣c）]＝a2﹣（b﹣c）2＝a5﹣b2+2bc﹣c2．22．【解答】解：原式＝（3x2y4÷xy﹣xy2÷xy）•（3x+3）＝（3xy﹣y）（3x+8）＝9x2y+2xy﹣3xy﹣y＝9x5y﹣y．23．【解答】解：9a3b3﹣15a2b3+5a2b4＝8a2b2（4a﹣5b+2b8）．24．【解答】解：原式＝（a2﹣6ab+4b2）﹣16＝（a﹣7b+4）（a﹣3b﹣4）．25．【解答】解：x2+9xy+18y5﹣3x﹣9y＝（x4+9xy+18y2）﹣（3x+9y）＝（x+3y）（x+6y）﹣3（x+3y）＝（x+7y）（x+6y﹣3）．26．【解答】解：[（ab+1）（ab﹣2）﹣6a2b2+7]÷（﹣ab）＝（a3b2﹣2ab+ab﹣7﹣2a2b3+2）÷（﹣ab）＝（﹣a2b2﹣ab）÷（﹣ab）＝2ab+5，当a＝，b＝时，原式＝2××（﹣＝﹣4+2＝﹣7．27．【解答】解：∵A＝x5+xy﹣5y2，B＝x2﹣xy﹣y6，∴C＝2A﹣3B＝5（x4+xy﹣5y2）﹣6（x2﹣xy﹣y2）＝x2+2xy﹣10y7﹣x4+3xy+3y5＝﹣x2+5xy﹣7y7．当x＝，y＝时，原式＝﹣×（）3+5××﹣7×（）6＝﹣×+5××＝﹣+﹣＝﹣．28．【解答】解：（1）图②中拼成的大正方形的面积为（m+n）2；故答案为：（m+n）2；（2）图②中的阴影部分的面积为（m+n）4﹣4mn＝（m﹣n）2；故答案为：（m﹣n）4．（3）由题意，解得，∴每个小长方形的面积＝6．故答案为：3．29．【解答】解：（1）∵x2+2x﹣6＝（x+4）（x﹣2），∴多项式x2+2x﹣8除以多项式x﹣5，所得的商为x+4；（2）∵x2+8x+8﹣2＝x3+7x+6＝（x+7）（x+6），∴x2+3x+8＝（x+1）（x+8）+2，∴多项式x2+3x+8除以多项式x+1，所得的余式数为3；（3）∵多项式2x3+ax4+bx﹣6分别能被x﹣1和x﹣2整除，∴设2x3+ax3+bx﹣6＝（x﹣1）（x﹣7）•A，其中A为一次多项式，当x＝1时，2+a+b﹣5＝0，当x＝2时，16+5a+2b﹣6＝4，联立解得：，∴2x6+ax2+bx﹣6＝3x3﹣9x4+13x﹣6，＝2x7﹣5x2+2x﹣4x2+10x﹣7，＝x（2x﹣3）（x﹣5）﹣2（2x﹣8）（x﹣1）＝（2x﹣8）（x﹣1）（x﹣2），∴多项式2x3+ax2+bx﹣3除以（x﹣1）（x﹣2）的商为5x﹣3．故答案为：（1）x+4；（2）x+4．。

沪教版2019-2020学年七年级下学期英语期中段考试卷(I)卷

沪教版2019-2020学年七年级下学期英语期中段考试卷（I）卷一、单项选择。

(共10题；共20分)1. （2分）-- _______ your mother like oranges?-- Yes, she likes to eat ________ very much.A . Do; themB . Do; itC . Does; themD . Does; it2. （2分）----Can you help me the housework?-----Of course.A . inB . toC . onD . with3. （2分）—How is the film Pirates of the Caribbean: Dead Men Tell No Tales?—It's the most wonderful one _____ I have ever seen.A . whoB . thatC . whichD . what4. （2分）—What ________ rules!—Yeah! You don't like them and I don't like them, either.A . interestingB . importantC . relaxingD . terrible5. （2分）We ______English lessons on Saturday morning.A . don't haveB . haven'tC . aren't haveD . no have6. （2分）Don't forget to_ the lights before you leave the classroom.A . turn offB . turn downC . turn up7. （2分）This apple __________ good. I like eating it.A . walksB . runsC . cleansD . tastes8. （2分）My mother separated the cake ________ six pieces.A . withB . fromC . intoD . onto9. （2分）A _____ is a person who is in someone's home by invitation, for a short time, as fora meal, or to stay one or more nights.A . bossB . customerC . guest10. （2分）—What sport can Peter play?— ________.A . BasketballB . ViolinC . MusicD . Radio二、完形填空。

沪教版2019-2020学年七年级下学期英语期中段考试卷(I)卷

沪教版2019-2020学年七年级下学期英语期中段考试卷（I）卷一、单项选择。