上海市浦东新区第四教育署2020-2021学年七年级(五四学制)6月阶段考试英语试题
2020-2021学年上海市浦东新区第四教育署七年级(上)期中数学试卷(五四学制) (解析版)
2020-2021学年上海市浦东新区第四教育署七年级第一学期期中数学试卷（五四学制）一、选择题1．（2分）表示“a与b两数和的平方”的代数式是（）A．a2+b2B．a+b2C．（a+b）2D．2（a+b）2．（2分）下列说法中，正确的是（）A．x不是单项式B．单项式﹣的系数是﹣C．是单项式D．多项式a2b2﹣2b3+1是四次三项式3．（2分）在下列单项式中，与5xy2是同类项的是（）A．5ab2B．5xy C．5x2y D．﹣7y2x4．（2分）在下列各式中，计算正确的是（）A．a+a＝a2B．x3+（﹣x）3＝0C．5a2﹣2a＝3a D．4m2+（﹣2m）2＝05．（2分）下列各式中，不能用平方差公式计算的是（）A．（﹣x﹣y）（x﹣y）B．（﹣x+y）（﹣x﹣y）C．（﹣x+y）（x+y）D．（﹣x+y）（x﹣y）6．（2分）若m＝272，n＝348，则m、n的大小关系正确的是（）A．m＞n B．m＜nC．m＝n D．大小关系无法确定二、填空题（本大题共有12小题，每题3分，共36分）7．（3分）单项式﹣2xy2z3的次数是．8．（3分）计算：﹣a﹣2a＝．9．（3分）化简：（2a2b）3＝．10．（3分）计算：（﹣2a）2•a3＝．11．（3分）计算：xy（x﹣y）＝．12．（3分）把多项式x3﹣7x2y+y3﹣4xy2按x的升幂排列为．13．（3分）已知﹣3x1﹣2a y b+2与是同类项，则a b＝．14．（3分）一个多项式A与x2﹣2x+1的和是2x﹣7，则这个多项式A为．15．（3分）已知a m＝2，a n＝3，则a m+n＝；a mn＝；a2m+3n＝．16．（3分）若（x+4）（x﹣2）＝x2﹣mx﹣n，则mn＝．17．（3分）如果a﹣b＝4，b﹣c＝1，那么（a﹣c）2+3a﹣1﹣3c＝．18．（3分）规定＝ad﹣bc，若，则﹣11x2+6＝．三、解答题（本大题共8小题，第19至22题每题5分，第23、24题每题6分，第25题8分，第26题12分，共52分）19．（5分）化简：3（a2﹣2ab）﹣2（﹣3ab+b2）20．（5分）计算：m2•m4+（﹣2m2）3﹣（﹣m）6．21．（5分）化简：4m（m﹣n）+（5m﹣n）（m+n）．22．（5分）计算：（2x+1）2﹣（x+2）2．23．（6分）计算：（x+y+z）（x+y﹣z）﹣（x+y+z）2．24．（6分）先化简，再求值：（x﹣2y）2﹣x（x+3y）﹣4y2，其中x＝﹣4，y＝﹣．25．（8分）如图所示是一个长方形．（1）根据图中尺寸大小，用含x的代数式表示阴影部分的面积S；（2）若x＝2，求S的值．26．（12分）完全平方公式：（a±b）2＝a2±2ab+b2适当的变形，可以解决很多的数学问题．例如：若a+b＝3，ab＝1，求a2+b2的值．解：因为a+b＝3，所以（a+b）2＝9，即：a2+2ab+b2＝9，又因为ab＝1所以a2+b2＝7根据上面的解题思路与方法，解决下列问题：（1）若x+y＝8，x2+y2＝40，求xy的值；（2）填空：①若（4﹣x）x＝5，则（4﹣x）2+x2＝．②若（4﹣x）（5﹣x）＝8，则（4﹣x）2+（5﹣x）2＝．（3）如图，点C是线段AB上的一点，以AC、BC为边向两边作正方形，设AB＝6，两正方形的面积和S1+S2＝18，求图中阴影部分面积．参考答案一、单项选择题（本大题共有6小题，每题2分，共12分）1．（2分）表示“a与b两数和的平方”的代数式是（）A．a2+b2B．a+b2C．（a+b）2D．2（a+b）解：表示“a与b两数和的平方”的代数式是（a+b）2．故选：C．2．（2分）下列说法中，正确的是（）A．x不是单项式B．单项式﹣的系数是﹣C．是单项式D．多项式a2b2﹣2b3+1是四次三项式解：A、x是单项式，原说法错误，故此选项不符合题意；B、单项式﹣的系数是﹣，原说法错误，故此选项不符合题意；C、不是单项式，原说法错误，故此选项不符合题意；D、多项式a2b2﹣2b3+1是四次三项式，原说法正确，故此选项符合题意．故选：D．3．（2分）在下列单项式中，与5xy2是同类项的是（）A．5ab2B．5xy C．5x2y D．﹣7y2x 解：由同类项的定义可知，x的指数是1，y的指数是2．A、所含有的字母不相同，不是同类项，故此选项不符合题意；B、x的指数是1，y的指数是1，不是同类项，故此选项不符合题意；C、x的指数是2，y的指数是1，不是同类项，故此选项不符合题意；D、x的指数是1，y的指数是2，是同类项，故此选项符合题意．故选：D．4．（2分）在下列各式中，计算正确的是（）A．a+a＝a2B．x3+（﹣x）3＝0C．5a2﹣2a＝3a D．4m2+（﹣2m）2＝0解：A、a+a＝2a，故原题计算错误；B、x3+（﹣x）3＝0，故原题就算正确；C、5a2和﹣2a不能合并，故原题计算错误；D、4m2+（﹣2m）2＝8m2，故原题计算错误；故选：B．5．（2分）下列各式中，不能用平方差公式计算的是（）A．（﹣x﹣y）（x﹣y）B．（﹣x+y）（﹣x﹣y）C．（﹣x+y）（x+y）D．（﹣x+y）（x﹣y）解：（﹣x﹣y）（x﹣y）＝﹣（x+y）（x﹣y）＝﹣（x2﹣y2）＝﹣x2+y2；（﹣x+y）（﹣x﹣y）＝（﹣x）2﹣y2＝x2﹣y2；（﹣x+y）（x+y）＝﹣（x﹣y）（x+y）＝﹣（x2﹣y2）＝﹣x2+y2．﹣（x﹣y）（x﹣y）＝﹣（x﹣y）2＝﹣x2+2xy﹣y2．故选：D．6．（2分）若m＝272，n＝348，则m、n的大小关系正确的是（）A．m＞n B．m＜nC．m＝n D．大小关系无法确定解：m＝272＝（23）24＝824，n＝348＝（32）24＝924，∵8＜9，∴m＜n，故选：B．二、填空题（本大题共有12小题，每题3分，共36分）7．（3分）单项式﹣2xy2z3的次数是6．解：单项式﹣2xy2z3的次数是1+2+3＝6，故答案为：6．8．（3分）计算：﹣a﹣2a＝﹣3a．解：﹣a﹣2a＝﹣3a．故答案为：﹣3a．9．（3分）化简：（2a2b）3＝8a6b3．解：（2a2b）3＝8a6b3，故答案为：8a6b3．10．（3分）计算：（﹣2a）2•a3＝4a5．解：原式＝4a2•a3＝4a5，故答案为：4a5．11．（3分）计算：xy（x﹣y）＝x2y﹣xy2．解：xy（x﹣y）＝x2y﹣xy2．故答案为：x2y﹣xy2．12．（3分）把多项式x3﹣7x2y+y3﹣4xy2按x的升幂排列为y3﹣4xy2﹣7x2y+x3．解：多项式x3﹣7x2y+y3﹣4xy2的各项为x3，﹣7x2y，y3，﹣4xy2，按x的升幂排列为：y3﹣4xy2﹣7x2y+x3．故答案为：y3﹣4xy2﹣7x2y+x3．13．（3分）已知﹣3x1﹣2a y b+2与是同类项，则a b＝9．解：∵﹣3x1﹣2a y b+2与是同类项，∴1﹣2a＝7，b+2＝4，解得a＝﹣3，b＝2，∴a b＝（﹣3）2＝9．故答案为：9．14．（3分）一个多项式A与x2﹣2x+1的和是2x﹣7，则这个多项式A为﹣x2+4x﹣8．解：2x﹣7﹣（x2﹣2x+1）＝2x﹣7﹣x2+2x﹣1＝﹣x2+4x﹣8．故答案为：﹣x2+4x﹣8．15．（3分）已知a m＝2，a n＝3，则a m+n＝6；a mn＝8；a2m+3n＝108．解：∵a m＝2，a n＝3，∴a m+n＝a m•a n＝2×3＝6；a mn＝（a m）n＝23＝8；a2m+3n＝a2m•a3n＝（a m）2•（a n）3＝22×33＝108．故答案为：6，8，108．16．（3分）若（x+4）（x﹣2）＝x2﹣mx﹣n，则mn＝﹣16．解：（x+4）（x﹣2）＝x2﹣2x+4x﹣8＝x2+2x﹣8，∵（x+4）（x﹣2）＝x2﹣mx﹣n，∴﹣m＝2，﹣n＝﹣8，∴m＝﹣2，n＝8，∴mn＝﹣2×8＝﹣16，故答案为：﹣16．17．（3分）如果a﹣b＝4，b﹣c＝1，那么（a﹣c）2+3a﹣1﹣3c＝39．解：∵a﹣b＝4，b﹣c＝1，∴a﹣c＝（a﹣b）+（b﹣c）＝5，∴原式＝（a﹣c）2+3（a﹣c）﹣1＝52+3×5﹣1＝25+15﹣1＝39．故答案为：39．18．（3分）规定＝ad﹣bc，若，则﹣11x2+6＝5．解：根据题中的新定义化简得：﹣5（x2﹣3）﹣2（3x2+5）＝4，去括号得：﹣5x2+15﹣6x2﹣10＝4，移项合并得：﹣11x2＝﹣1，则原式＝﹣1+6＝5，故答案为：5三、解答题（本大题共8小题，第19至22题每题5分，第23、24题每题6分，第25题8分，第26题12分，共52分）19．（5分）化简：3（a2﹣2ab）﹣2（﹣3ab+b2）解：原式＝（3a2﹣6ab）﹣（﹣6ab+2b2）＝3a2﹣6ab+6ab﹣2b2＝3a2﹣2b2．20．（5分）计算：m2•m4+（﹣2m2）3﹣（﹣m）6．解：原式＝m6﹣8m6﹣m6＝﹣8m6．21．（5分）化简：4m（m﹣n）+（5m﹣n）（m+n）．解：原式＝4m2﹣4mn+5m2+5mn﹣mn﹣n2＝9m2﹣n2．22．（5分）计算：（2x+1）2﹣（x+2）2．解：（2x+1）2﹣（x+2）2＝4x2+4x+1﹣x2﹣4x﹣4＝3x2﹣3．23．（6分）计算：（x+y+z）（x+y﹣z）﹣（x+y+z）2．解：（x+y+z）（x+y﹣z）﹣（x+y+z）2＝（x+y）2﹣z2﹣[（x+y）+z]2＝（x+y）2﹣z2﹣[（x+y）2+2z（x+y）+z2]＝（x+y）2﹣z2﹣（x+y）2﹣2z（x+y）﹣z2＝﹣2z2﹣2xz﹣2yz．24．（6分）先化简，再求值：（x﹣2y）2﹣x（x+3y）﹣4y2，其中x＝﹣4，y＝﹣．解：原式＝x2+4y2﹣4xy﹣x2﹣3xy﹣4y2＝﹣7xy，当x＝﹣4，y＝﹣时，原式＝﹣7×（﹣4）×（﹣）＝﹣14．25．（8分）如图所示是一个长方形．（1）根据图中尺寸大小，用含x的代数式表示阴影部分的面积S；（2）若x＝2，求S的值．解：（1）S阴影部分＝S长方形﹣S三角形ABC﹣S三角形DEF＝12×6﹣×12×6﹣×6×（6﹣x）＝72﹣36﹣18+3x＝18+3x；（2）当x＝2时，S＝18+3×2＝24．26．（12分）完全平方公式：（a±b）2＝a2±2ab+b2适当的变形，可以解决很多的数学问题．例如：若a+b＝3，ab＝1，求a2+b2的值．解：因为a+b＝3，所以（a+b）2＝9，即：a2+2ab+b2＝9，又因为ab＝1所以a2+b2＝7根据上面的解题思路与方法，解决下列问题：（1）若x+y＝8，x2+y2＝40，求xy的值；（2）填空：①若（4﹣x）x＝5，则（4﹣x）2+x2＝6．②若（4﹣x）（5﹣x）＝8，则（4﹣x）2+（5﹣x）2＝17．（3）如图，点C是线段AB上的一点，以AC、BC为边向两边作正方形，设AB＝6，两正方形的面积和S1+S2＝18，求图中阴影部分面积．解：（1）∵x+y＝8，∴（x+y）2＝64，即，x2+2xy+y2＝64，又∵x2+y2＝40，∴2xy＝24∴xy＝12；（2）①（4﹣x）2+x2＝（4﹣x+x）2﹣2（4﹣x）x＝16﹣2×5＝6，故答案为：6；②∵（4﹣x）（5﹣x）＝8，∴（4﹣x）（x﹣5）＝8﹣，∴（4﹣x）2+（5﹣x）2＝（4﹣x）2+（x﹣5）2＝[（4﹣x）+（x﹣5）]2﹣2（4﹣x）（x﹣5）＝1﹣2×（﹣8）＝1+16＝17，故答案为：17；（3）设AC＝a，BC＝b，则S1＝a2，S2＝b2，由S1+S2＝18可得，a2+b2＝18，而a+b＝AB＝6，而S阴影部分＝ab，∵a+b＝6，∴a2+2ab+b2＝36，又∴a2+b2＝18，∴2ab＝18，∴S阴影部分＝ab ＝＝，即，阴影部分的面积为．11 / 11。
上海市浦东第四教育署(五四制)2020-2021学年六年级上学期期中考试英语试题
2020学年度第一学期期中教学质量自主调研六年级英语(时间75分钟, 满分100分)Part 1 Listening (第一部分听力) (共25分)I. A. Listen and choose the right pictures (根据你听到的句子, 选出相应的图片) ：(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) ：(8分)6. A) A piece of pizza. B) A hamburger.C) A glass of Coca-cola. D) Some rice dumplings.7. A) She will go on a picnic. B) She will go on a trip.C) She will go shopping. D) She will go to the park.8. A) One. B) Two. C) Three. D) Four.9. A) By bike. B) By bus. C) By car. D) By underground.10. A) Once a day B) Twice a day. C) Once a week. D) Twice a week.11. A) In the classroom B) In the library. C) In the bookstore. D) In the office.12. A) Ten minutes B) Fifteen minutes. C) Five minutes. D) Half an hour.13. A) They are seeing the film. B) They are talking about the film.C) They are talking about the book. D) They are reading the book.C. Listen to the passage and say whether the following statements are true or false (听短文, 判断对错) ∶(6分)14. Americans like playing baseball.15. There are more than ten players in each baseball team.16. There are no baseball games in winter. .17. When the two top teams play against each other, all of the baseball fans (迷) go to watch it.18. Millions of baseball fans watch baseball games only on TV.19. After the baseball season, people still talk about the result (结果) and the players.D. Listen and fill in the blanks with the word you hear (听短文, 完成句子内容填写。
上海市浦东新区第四教育署2020-2021学年七年级下学期期中英语试题逐题详解
20. Sometimes Snoopy likes to wear a pair of ________ ________.
21. Snoopy is ________ ________all of his friends.
12. Our teeth haveห้องสมุดไป่ตู้at least two important functions.
13. They keep the lower part of our face looking nice, and they grind (磨)up our food.
14. The crocodile has a few tooth problems.
6. A. It’s in Puxi. B. It’s in Pudong. C. It’s next to Shanghai Wild Animal Park. D. It’s near Shanghai Botanical Gardens.
7. A. A Pilot.B. An architect.C. A driver.D. An officer.
IV. Listen to the passage and complete the following sentences (听短文,完成下列内容,每空格限填一词)(共8分)
18. Do you want to know ________ ________ do Snoopy and his friends take in it?
5.Then the Luck Fairy ________ [ˌdɪsəˈpɪəd].
2020-2021学年上海市浦东新区第四教育署七年级上学期期末语文试题(学生版)
2020学年度第一学期期末教学质量自主调研七年级语文一、文言文阅读（30分）（一）（8分）1.默写（1）夜阑卧听风吹雨，________。
（《十一月四日风雨大作》（其二））（2）晴空一鹤排云上，__________。
（《秋词》（其一））（3）_________，非志无以成学。
（《诫子书》）（4）三军可夺帅也，______。
（《子罕》）（二）（4分）阅读下面这首诗，完成后面小题闻王昌龄左迁龙标遥有此寄杨花落尽子规啼，闻道龙标过五溪。
我寄愁心与明月，随君直到夜郎西。
2.《闻王昌龄左迁龙标遥有此寄》的作者是“诗仙”__，诗中“杨花”是指___。
3.这首诗的第一句写到“杨花”“子规”，有什么作用？（三）（8分）阅读下文，完成下面小题狼一屠晚归，担中肉尽，止有剩骨。
途中两狼，缀行甚远。
屠惧，投以骨。
一狼得骨止，一狼仍从。
复投之，后狼止而前狼又至。
骨已尽矣，而两狼之并驱如故。
屠大窘，恐前后受其敌。
顾野有麦场，场主积薪其中，苫蔽成丘。
屠乃奔倚其下，弛担持刀。
狼不敢前，眈眈相向。
少时，一狼径去，其一犬坐于前。
久之，目似瞑，意暇甚。
屠暴起，以刀劈狼首，又数刀毙之。
方欲行，转视积薪后，一狼洞其中，意将隧入以攻其后也。
身已半入，止露尻尾。
屠自后断其股，亦毙之。
乃悟前狼假寐，盖以诱敌。
狼亦黠矣，而项刻两毙，禽兽之变诈几何哉？止增笑耳。
4.《狼》选自《____》，作者是__朝的蒲松龄。
5.解释下列加点词（1）缀．行甚远（）（2）而两狼之并驱如故．．（）6.翻译下面句子。
方欲行，转视积薪后，一狼洞其中，意将隧入以攻其后也。
7.下列句子中，点明文章中心的句子是（）A.骨已尽矣，而两狼之并驱如故。
B.以刀劈狼首，又数刀毙之。
C.狼亦黠矣，而顷刻两毙，禽兽之变诈几何哉？D.狼不敢前，眈眈相向。
（四）（10分）阅读下文，完成下面小题辽阳妇拒贼辽阳东山，虏人剽掠至一家，男子俱不在，在者惟三四妇人耳。
虏不知虚实，不敢入其室，於院中以弓矢恐之。
2020学年上海市浦东新区第四教育署七年级(下)期中数学试卷(五四学制)(解析版)
2020年上海市浦东新区七年级（下）期中数学试卷一、选择题（本大题共6小题，共12.0分）1.所有和数轴上的点组成一一对应的数组成（）A. 整数B. 有理数C. 无理数D. 实数2.在下列五个数中①√2，②√(−2)2，③17，④0.777…，⑤2π，是无理数的是（）29A. ①③⑤B. ①②⑤C. ①④D. ①⑤3.下列运算中，正确的是（）A. √2+√3=√5B. √( √3−2 )2=√3−2C. √a2=aD. ( √a+b )2=a+b4.已知同一平面上的两个角的两条边分别平行，则这两个角（）A. 相等B. 互补C. 相等或互补D. 互余5.如图，与∠B互为同旁内角的有（）A. 1个B. 2个C. 3个D. 4个6.如图，AB∥CD，那么∠A，∠D，∠E三者之间的关系（）A. ∠A+∠D+∠E=360∘B. ∠A−∠D+∠E=180∘C. ∠A+∠D−∠E=180∘D. ∠A+∠D+∠E=180∘二、填空题（本大题共12小题，共36.0分）7.36的平方根是______．8.比较大小：-√10______-3．9.计算：-2713=______．10.如果a4=81，那么a=______．4化成幂的形式是______．11.把√7312.计算：（√2+√5）（√2-√5）=______．13.近似数5.20×105有______个有效数字．14.已知数轴上的点A、B所对应的实数分别是-1.2和3，那么AB=______．415.如图，直线AB和CD相交于O点，若∠AOD=127°，则AB和CD的夹角为______度．16.如图，直线a∥b，点C在直线b上，AC⊥BC，∠1=55°，则∠2=______°．17.如图，∠BAC=90°，AD⊥BC，垂足为D，则点C到直线AB的距离是线段______的长度．18.一张对边互相平行的纸条折成如图，EF是折痕，若∠EFB=32°，则：①∠C′EF=32°；②∠AEC=148°；③∠BGE=64°；④∠BFD=116°．以上结论正确的有______．（填序号）三、计算题（本大题共4小题，共20.0分）19.3√7-12√7+2√7-32√720.12√6×4√12÷23√221. −8134÷|-2|+(449)−12-(-2-√3)022. 已知√2x −3+|y 3+1|=0，求4x -3y 的平方根．四、解答题（本大题共5小题，共32.0分）23. 计算：√426×√8÷√26．24. 作图并写出结论：如图，点P 是∠AOB 的边OA 上一点，请过点P 画出OA ，OB 的垂线，分别交BO 的延长线于M 、N ，线段______的长表示点P 到直线BO 的距离；线段______的长表示点M 到直线AO 的距离；线段ON 的长表示点O 到直线______的距离；点P 到直线OA 的距离为______．25.已知AB∥DE，CD⊥BF，∠ABC=128°，求∠CDF的度数．解：过点C作CG∥AB∴∠1+∠ABC=180°（______）∵AB∥DE（已知）∴CG∥DE（______）∴∠CDF=∠2 （______）∵∠ABC=128°（已知）∴∠1=180°-______=______°∵CD⊥DF（已知）∴∠DCB=90°，∴∠2=90°-∠1=38°∴∠CDF=38°（______）26.如图，已知：AC∥DF，直线AF分别与直线BD、CE相交于G、H，∠1=∠2，说明∠C=∠D．27.将一副三角板中的两块直角三角尺的直角顶点C按如图方式叠放在一起（其中，∠A=60°，∠D=30°；∠E=∠B=45°：（1）①若∠DCE=45°，则∠ACB的度数为______；②若∠ACB=140°，求∠DCE的度数；（2）由（1）猜想∠ACB与∠DCE的数量关系，并说明理由．（3）当∠ACE＜180°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角度所有可能的值（不必说明理由），若不存在，请说明理由．答案和解析1.【答案】D【解析】解：所有和数轴上的点组成一一对应的数组成实数，故选：D．根据实数与数轴的关系进行解答．本题考查的是实数与数轴的关系，熟知实数与数轴上的点是一一对应关系是解答此题的关键．2.【答案】D【解析】解：=2，所给数据中无理数有：①，⑤2π．故选：D．根据无理数的三种形式：①开方开不尽的数，②无限不循环小数，③含有π的数，结合所给数据进行判断即可．本题考查了无理数的定义，属于基础题，解答本题的关键是熟练掌握无理数的三种形式．3.【答案】D【解析】解：A、与不能合并，所以A选项错误；B、=|-2|=2-，所以B选项错误；C、=|a|，所以C选项错误；D、（）2=a+b，所以D选项正确．故选：D．分别根据二次根式的性质化简即可判断．本题考查了二次根式的性质与化简：（a≥0）为二次根式；=|a|；=•（a≥0，b≥0）等．4.【答案】C【解析】解：如图：∵AD∥BC，AB∥CD，∴四边形ABCD是平行四边形，∴∠B=∠ADC，∵∠ADC+∠CDE=180°，∴∠B+∠CDE=180°．∴同一平面上的两个角的两条边分别平行，则这两个角相等或互补．故选：C．首先根据题意作图，然后由平行线的性质与邻补角的定义，即可求得同一平面上的两个角的两条边分别平行，则这两个角相等或互补．此题考查了平行线的性质与平行四边形的判定与性质．此题比较简单，解题的关键是注意数形结合思想的应用．5.【答案】C【解析】解：∠B的同旁内角有：∠BDE、∠BCE、∠BAC共3个．故选：C．根据同旁内角的定义，结合图形进行寻找即可．此题考查了同旁内角的定义，属于基础题，关键是掌握互为同旁内角的两个角的位置特点．6.【答案】B【解析】解：如图，过点E作EF∥AB，则∠1=180°-∠A，∵AB∥CD，∴EF∥CD，∴∠2=∠D，∵∠1+∠2=∠E，∴180°-∠A+∠D=∠E，∴∠A+∠E-∠D=180°．故选：B．过点E作EF∥AB，根据两直线平行，同旁内角互补表示出∠1，两直线平行，内错角相等表示出∠2，再根据∠E=∠1+∠2整理即可得解．本题考查了平行线的性质，此类题目，过拐点作辅助线是解题的关键．7.【答案】±6【解析】解：36的平方根是±6，故答案为：±6．根据平方根的定义求解即可．本题考查了平方根的定义，解答本题的关键是掌握一个正数的平方根有两个，且互为相反数．8.【答案】＜【解析】解：∵-3=-，∴-＜-3．故填空答案：＜．先把-3变为9算术平方根的相反数，再根据比较实数大小的方法进行比较即可．此题主要考查了实数的大小比较．注意两个无理数的比较方法：统一根据二次根式的性质，把根号外的移到根号内，只需比较被开方数的大小．9.【答案】-3【解析】解：-=-=-3．故答案为：-3．根据分数指数幂的定义直接解答即可．本题考查了分数指数幂的知识，分数指数幂是根式的另一种表示形式，即n次根号（a的m次幂）可以写成a的次幂，（其中n是大于1的正整数，m是整数，a大于等于0）．10.【答案】3或-3【解析】解：∵a4=81，∴（a2）2=81，∴a2=9，∴a=3或-3．故答案为：3或-3．根据有理数的开方运算计算即可．本题考查了有理数的乘方运算的逆运算，解题时注意不用漏解．11.【答案】734【解析】解：=，故答案是：．根据分数指数次幂的意义即可求解．本题考查了分数的指数次幂，理解分数的指数次幂的意义是关键．12.【答案】-3【解析】解：原式=（）2-（）2=2-5=-3．故答案为：-3．结合二次根式混合运算的运算法则进行求解即可．本题考查了二次根式混合运算的运算法则，解答本题的关键在于熟练掌握二次根式混合运算的运算法则．13.【答案】3【解析】解：根据有效数字的概念，知近似数5.20×105的有效数字和5.20的有效数字相同，即有5，2，0，一共3个．故答案为3．有效数字是从左边第一个不是0的数字起后面所有的数字都是有效数字．用科学记数法表示的数a×10n的有效数字只与前面的a有关，与10的多少次方无关．本题考查了近似数和有效数字，对于用科学记数法表示的数，有效数字的计算方法是需要识记的内容，经常会出错．14.【答案】1.95【解析】解：依题意，得AB=-（-1.2）=0.75+1.2=1.95．故答案为：1.95．根据题意可知A点在原点左边，离原点距离为1.2，B点在原点右边，离原点距离为，由此列出算式求AB．本题考查了实数与数轴的关系．关键是明确数对应的点与原点的距离．15.【答案】53°【解析】解：∵∠AOD=127°，∴∠AOC=180°-127°=53°，故答案为：53°．根据邻补角互补可得答案．此题主要考查了邻补角，关键是掌握邻补角互补．16.【答案】35【解析】解：∵a∥b，∴∠3=∠1=55°，∴∠2=180°-90°-55°=35°．故答案是：35根据平行线的性质求得∠3的度数，即可求得∠2的度数．本题考查了平行线的性质，理解性质定理是关键．17.【答案】CA【解析】解：点C到直线AB的距离是线段AC的长度，故答案为CA．根据直线外一点到直线的垂线段的长度，叫做点到直线的距离可得答案．此题主要考查了点到直线的距离，关键是掌握点到直线的距离是垂线段的长度．18.【答案】①③④【解析】解：∵AC′∥BD′，∴∠C′EF=∠EFB=32°，所以①正确； ∵一张对边互相平行的纸条折成如图，EF 是折痕，∴∠C′EF=∠CEF=32°， ∴∠AEC=180°-2×32°=116°，所以②错误； ∵AC′∥BD′，∴∠BGE+∠AEG=180°， ∴∠BGE=180°-116°=64°，所以③正确； ∵GC ∥FD ，∴∠BFD=∠BGC=180°-∠BGE=180°-64°=116°，所以④正确． 故答案为：①③④．根据平行线的性质由AC′∥BD′可得到∠C′EF=∠EFB=32°；根据折叠的性质得到∠C′EF=∠CEF=32°，再利用邻补角的定义得到∠AEC=116°；由于AC′∥BD′，根据平行线的性质得∠BGE+∠AEG=180°，则∠BGE=180°-116°=64°；由GC ∥FD ，根据平行线的性质和对顶角相等得∠BFD=∠BGC=180°-∠BGE=116°．依此即可求解． 本题考查了平行线性质：两直线平行，同位角相等；两直线平行，同旁内角互补；两直线平行，内错角相等．19.【答案】解：原式=（3-12+2-32）×√7=3√7．【解析】根据合并同类二次根式的法则计算可得．本题主要考查二次根式的加减法，二次根式相加减，先把各个二次根式化成最简二次根式，再把被开方数相同的二次根式进行合并，合并方法为系数相加减，根式不变．20.【答案】解：原式=12×4×32×√6×12÷2=3√36=18．【解析】 ↵本题主要二次根式的乘除法，解题的关键是熟练掌握二次根式的乘除运算法则．直接根据二次根式的乘除法计算即可求出答案．21.【答案】解：原式=-27÷2+72-1 =-272+72-1 =-10-1=-11．【解析】先计算分数指数幂、绝对值和零指数幂，再进一步计算可得．本题主要考查实数的运算，解题的关键是熟练掌握分数指数幂、绝对值和零指数幂．22.【答案】解：根据题意知2x -3=0，y 3+1=0∴x =32，y =-1，∴4x -3y =9，∴4x -3y 的平方根为±3． 【解析】 此题主要考查了立方根、平方根定义和非负数的性质，其中求一个数的立方根，应先找出所要求的这个数是哪一个数的立方．注意：（1）一个数的立方根与原数的性质符号相同；（2）一个正数有两个平方根，它们互为相反数；0的平方根是0；负数没有平方根．首先根据绝对值和被开方数的非负性可以求x 、y 的值，再根据平方根的定义即可求解．23.【答案】解：原式=246×223÷216 =276．【解析】先把开方运算表示成分数指数幂的形式，再根据同底数乘法、除法法则计算即可．本题考查了分数指数幂．解题的关键是知道开方和分数指数幂之间的关系．24.【答案】PN；PM；PN；0【解析】解：如图所示：线段PN的长表示点P到直线BO的距离；线段PM的长表示点M到直线AO 的距离；线段ON的长表示点O到直线PN的距离；点P到直线OA的距离为0，故答案为：PN，PM，PN，0．先根据题意画出图形，再根据点到直线的距离的定义得出即可．本题考查了点到直线的距离，能熟记点到直线的距离的定义是解此题的关键．25.【答案】两直线平行，同旁内角互补；平行的传递性；两直线平行，内错角相等；128°；52；等量代换【解析】解：过点C作CG∥AB∴∠1+∠ABC=180°（两直线平行，同旁内角互补）∵AB∥DE（已知）∴CG∥DE（平行的传递性）∴∠CDF=∠2 （两直线平行，内错角相等）∵∠ABC=128°（已知）∴∠1=180°-128°=52°∵CD⊥DF（已知）∴∠DCB=90°，∴∠2=90°-∠1=38°∴∠CDF=38°（等量代换）故答案为：两直线平行，同旁内角互补；平行的传递性；两直线平行，内错角相等；128°（或∠ABC），52；等量代换．根据平行线的判定和性质解答即可．本题考查了平行线的判定和性质、熟练掌握平行线的判定和性质是解答本题的关键．26.【答案】证明：∵∠1=∠2，∠1=∠DGH（对顶角相等），∴∠2=∠DGH（等量代换），∴DB∥EC（同位角相等，两直线平行），∴∠C=∠ABG（两直线平行，同位角相等），∵AC∥DF，∴∠D=∠ABG（两直线平行，内错角相等），∴∠C=∠D．【解析】本题考查了平行线的性质和判定的应用，注意：①两直线平行，同位角相等，②两直线平行，内错角相等，③两直线平行，同旁内角互补，反之亦然，题目比较好，难度适中．根据对顶角相等和已知求出∠2=∠DGH，推出DB∥EC，根据平行线的性质得出∠C=∠ABG，∠D=∠ABG，即可推出答案．27.【答案】135°【解析】（1）①∵∠DCE=45°，∠ACD=90°∴∠ACE=45°∵∠BCE=90°∴∠ACB=90°+45°=135°故答案为：135°；②∵∠ACB=140°，∠ECB=90°∴∠ACE=140°-90°=50°∴∠DCE=90°-∠ACE=90°-50°=40°；（2）猜想：∠ACB+∠DCE=180°理由如下：∵∠ACE=90°-∠DCE又∵∠ACB=∠ACE+90°∴∠ACB=90°-∠DCE+90°=180°-∠DCE即∠ACB+∠DCE=180°；（3）30°、45°、120°、135°、165°．理由：当CB∥AD时，∠ACE=30°；当EB∥AC时，∠ACE=45°；当CE∥AD时，∠ACE=120°；当EB∥CD时，∠ACE=135°；当BE∥AD时，∠ACE=165°．（1）①根据∠DCE和∠ACD的度数，求得∠ACE的度数，再根据∠BCE求得∠ACB的度数；②根据∠BCE和∠ACB的度数，求得∠ACE的度数，再根据∠ACD求得∠DCE的度数；（2）根据∠ACE=90°-∠DCE以及∠ACB=∠ACE+90°，进行计算即可得出结论；（3）分五种情况进行讨论：当CB∥AD时，当EB∥AC时，当CE∥AD时，当EB∥CD时，当BE∥AD时，分别求得∠ACE角度．本题主要考查了平行线的性质，以及直角三角形的性质，解题时注意分类讨论思想的运用，分类时注意不能重复，也不能遗漏．。
上海市浦东新区第四教育署2021-2021学年七年级英语下学期期中试题(五四制)
上海市浦东新区第四教育署2021-2021学年七年级英语下学期期中试题（测试时间：75分钟，满分：100分）考生注意：所有答案务必按照规定在答题纸上完成，做在试卷上不给分。
Part 1 Listening （第一部分听力共25分）I. Listen to the sentence and choose the right picture. (听句子，选出与内容符合的图片，用A、B、C、D、E、F等表示) (5分)(A) (B) (C)(D) (E) (F)II. Listen to the dialogue and choose the best answer to the question you hear. (根据你所听到的对话和问题，选出最恰当的答案，用A、B、C、D等表示) (8分)6. A. In the middle. B. On the left. C. On the right. D. In the centre.7. A. An artist. B.A doctor. C. A policewoman. D. A bank clerk.8. A. In a park. B. On a road. C. In a hotel. D. In a library.9. A. Basketball. B. Table tennis. C. Tennis. D. Volleyball.10. A. At 8:45. B. At 8:15. C. At 8:30. D. At 8:0011. A. This morning. B. Tomorrow morning.C. This afternoonD. Tomorrow afternoon.12. A. Beijing. B. Qingdao. C. Hainan. D. Dalian.13. A. The man is looking for the woman.B. The man is looking for a washroom.C. The man is looking for a sign.D. The woman will take the man to the washroom.III. Listen to the passage and tell whether the following statements are true orfalse. (根据你所听到的短文内容判断下列句子是否正确，符合的用“T”表示，不符合的用“F”表示) (6分)Peter’s father’s birthday is coming.Peter has bought her mother a beautiful present.Peter hasn’t got enough money to buy an MP4.Peter doesn’t know what size of shoes her mother wears.Kate asks Peter to buy a picture for his mother.Love is the most expensive present in the world and everyone is happy to get it.IV. Listen to the passage and complete the following sentences. (听短文，完成下列句子，每空格限填一词) (6分)It’s ________ news for many Chinese couples（夫妇） to have two children._________ interviewed some primary school students in Hainan.A student said he doesn’t need to _______ _______ his parents by himself if hehas a younger brother or sister.Another student want a brother to do things for him, like washing his _______. Some students don’t want one because they think the baby must be very _______.Part 2 Vocabulary and Grammar（第二部分词汇和语法共45分）I. Look at the phonetic symbol and fill in the blanks. (看音标写单词) (5分)26. Nowadays, the _______ [praɪs] of houses is too high for most people to affordin Shanghai.27. This is the shortest _________ [ru:t]to the railway station.28. His friend sent some new washing _______ [məˈʃi:nz] to his factory last month.29._______ ['hæpɪnəs] is a feeling that lights up your eyes, makes your steps light and makes you want to sing for no reason.II. Choose the best answer (选择最恰当的答案) (17分)A. They’re talking about how to organize the English Evening.C. You should put on more clothes. It cold outside.D. “Open your mouth, please! ” said the doctor.31. __________ tall man over there is a famous writer.A. AnB. /C. AD. The32. Ken taught ________English at home because his family is too poor.A. heB. himselfC. himD. his33. Both teachers and students are busy _________ June.A. withB. inC. onD. at34. The river is polluted, so ________ people come to swim in it.A. a littleB. littleC. fewD. a few Kunming is _________ a City of Spring for its pleasant weather and beautiful views.A. famous forB. full ofC. known forD. known as36. When you work with ______, you will find more about yourself.A. otherB. the otherC. othersD. another37. His sister doesn’t go to the zoo. ____________.A. So am IB. So do IC. Neither am ID. Neither do I38. You’re late. The film __________ for 10 minutes.A. beg anB. has been onC. has begunD. was on39. The heavy rain made him _________ at home all day.A. to stayB. stayC. stayingD. stayed40. Mr. Smith came to Shanghai _________.A. since 2006B. for 10 yearsC. 10 years agoD. next year41. I ________ a new pair of shoes. I need to buy a new shirt.A. don’t needB. needn’tC. don’t need toD.needsA. anything importantB. something importantC. important somethingD. important anything43. Miss Fan prefers the ________ with the V-neck.A. jeansB. handkerchiefC. stockingsD. sweater44. That was really an _______ film. We didn’t know the ending until the last minute.A. excitingB. excitedC. exciteD. excitement45. ________ it’s very late now, my mother is still working hard on her project.A. SoB. AlthoughC. AndD. ButA. Yes, you can.B. Yes, thanks.C. I’d rather not.D. I’d like a cup of coffee.III. Complete the following passage with the words or expressions in the box. Each can only be used once. (将下列单词或词组填入空格，每空格限填一词，每词只能填一次，用A、B、C、D、E、F等表示) (5分)A. clothesB.spentC. convenientD.andE.becomeF. thanA growing number of Chinese Internet users like Wang have found the joys of online shopping. Most online shoppers are students or young workers. More women shop online 48 men. Clothing and homeuse products (产品) are the most popular online.It was reported that more than 250 billion yuan was 49 on online shopping last year, 80% through Taobao.Taoba o means “looking for treasure” in Chinese. People can find almost everything they need on Taobao, from 50 to books, from candies to DVDplayers. “You may question the security of online shopping,” WangLin said. “It's very safe and 51 .Unless you receive theproducts from sellers and are satisfied with them, the shop ownerwill not get the money.You can also get your money back if you want to return the product.”IV. Complete the sentences with the given words in their proper forms. (用括号内所给单词的适当形式完成句子，每空格限填一词) (6分)52. His home is one floor higher than _________ (they).53. Leonardo DiCaprio is one of the greatest __________in the world. (act)54. The film Kongfu Panda III is full of ________ (laugh) and fun.55. Everything is going _______________ (good) than before56. This way, please! The _______ (change) room is on the left.57. The sun __________ (appear) behind the mountain a few minutes ago.V. Rewrite the following sentences as required. (根据要求改写句子，每空格限填一词) (12分)The artist earned a lot of money by selling paintings.（变否定句）The artist ________ earn _______ money by selling paintings.59. Shanghai Disney Amusement Park will open in June this year.( 改一般疑问句)60. My uncle has been an architect since 2001.(划线部分提问）61. Susan can hardly hear the answer.(改为反意疑问句)63. took, me, it, hours, to, three, homework, the, finish（连词成句）____________________________________________________________________Part 3 Reading and Writing ( 第三部分阅读和写话共30分)I. Reading comprehension. (阅读理解): (共20分)Choose the best answer. (根据文章内容，选择最恰当的答案，用A、B、C、D等表示)(5分)As sweet as Hello Kitty: She likes to eat cakes. She loves to make new friends. She asks friends to her tea parties. She is warm and sunny and will always help you. As clever as Snoopy: He goes to school when he is nine. He learns to use a typewriter in two years! He thinks a lot. He is so clever that you like to be with him.As naughty as Mashimaro: He doesn’t look like a good boy. He has sleepy eyes and looks naughty. He always plays tricks on people. So you get angry with him and don’t like him very much. His mind is active and full of ideas. He tries to be big and catch your eyes. But, he’s still a child.If you want to make a friend like Snoopy, he or she must be _______ at least.A. cleverB. naughtyC. activeD. sweetTom’s friend is always warm-hearted with sharp words. He is just like _______.A. Hello KittyB. MashimaroC. SnoopyD. GarfieldThe underlined words “play tricks” probably mean _______.A. plays gamesB. is friendly toC. makes fun ofD. makes friendsMay is a kind-hearted girl. She is always ready to help others. Her favourite foodis cake. Her friends all call her _________.A. Hello KittyB. SnoopyC. MashimaroD. Garfield According to the passage, people love cartoon animals because _________.A. they are the animals that often make people laughB. their personalities（性格）are like the people around themC. the cartoon animals are sunny, warm and full of ideasD. they always help people, think a lot and try to b e bigB. Choose the words or expressions and complete the passage. (选择最恰当的单词或词语完成短文，用A、B、C、D等表示) (5分)Long ago, in a small village of Wakefield lived two farmers, Harry and Peter. Harry was very hard-working while Peter was 69 . Every day Harry got up early and came home late, but Peter walked around for fun.One summer there was no 70 and the crops were dying. Harry thought, “I mustdo something to save these crops, or they will die.” With this thought in mind,he went out to find a river so that he could dig a canal(沟渠)to his field. He walkedon and on, feeling tired and thirsty. After a long search, he found a river fullof blue water. He was very happy. He started digging a canal to his field. 71 it was noon, his wife sent their daughter to bring Harry home for lunch. But Harry did not go. He didn’t want to leave his work unfinished. He completed his work 72 at night. Then he went home, had a good meal and fell into a sound sleep.Peter had the same idea. But he was not at all determined(有决心的). He also 73 digging a can al to his field but he didn’t have his work completed. At last his field did not get enough water and all his crops died．Harry’s field would be watered when needed. He had a good harvest that autumn becauseof his hard work．69. A. cruel B. 1azy C. careless D. silly70. A. rain B. wind C. cloud D. river71. A. If B. Although C. When D. Unless72. A. early B. far C. late D. deep73. A. stopped B. loved C. forgot D. startedC. Read the passage and fill in the blanks with proper words. (在短文的空格内填入适当的词，使其内容通顺，每空格限填一词，首字母已给) (5分)Don’t be afraid to show people what you are really good at. Talk about the things you like. People will be interested in you if there is s 75 interesting about you.Look people in the eye when you talk to them. That way, they’ll find it easier to talk to you, or people may think you’re not interested in them and may s 76 being interested in you.Be a good listener. Let people talk about themselves before talking about”me, me, me”. Ask lots of questions. Show an interest in their a 77 .Try to make friends with the kind of people you r 78 like, respect,and admire （羡慕）-not just with those who are easy to meet. Be friends with lots of people. That way, you’ll have more chances for making friends.D. Read the passage and answer the questions. (根据短文内容回答下列问题) (5分)My Friend Peter was kind and lovely. But as a student, he was bad at maths, English and science because he didn’t have an aptitude(资质)for that kind of study. One day we were playing football and the ball got stuck in a tree. Peter climbed the tree to get it, and one of the teachers, John Marston, who was looking out of the window, noticed that he was a talented climber. Mr. Marston was very goodat climbing. He had climbed many mountains. One weekend Mr Marston invited Peterto climb Mount Kilimanjaro. Peter really enjoyed the climbing. Mr Marston told Peter that he was a talented climber for his age. Peter left school three years later with no qualifications (毕业证), but he kept climbing regularly until he became very good at it. In his early twenties, he became a famous climber. He said, “I alwaysremember Mr Marston because he showed me I had an ability which noone else, including me, knew about.”II.Writing. (作文)84. Write a passage of at least 50 words on the topic “________ is fun ”. (以“_____是快乐的”为题写一篇不少于50字的短文，标点符号不占格) (10分)提示：生活你经常会做一些你喜欢做的事情，如打球、旅游、看电影、看书、上网等等。
2020-2021学年上海市浦东新区第四教育署七年级上学期调研数学试卷(含解析)
2020-2021学年上海市浦东新区第四教育署七年级（上）调研数学试卷一、选择题（共6小题）.1．（2分）下列不能表示“2a”的意义的是（）A．2的a倍B．a的2倍C．2个a相加D．2个a相乘2．（2分）下列式子中，单项式是（）A．3a+1B．C．3a D．x＝13．（2分）下列各选项中是同类项的是（）A．﹣a2b和ab2B．a2和22C．﹣ab2和2b2a D．2ab和2xy4．（2分）下列运算正确（）A．a2+a3＝a5B．a2•a3＝a6C．（a2）3＝a8D．（﹣a）2•a3＝a55．（2分）如果M＝x2+6x+22，N＝﹣x2+6x﹣3，那么M与N的大小关系是（）A．M＞N B．M＜N C．M＝N D．无法确定6．（2分）按下面的程序计算，如果输入x的值是30，那么输出的结果为（）A．470B．471C．118D．119二、填空题（共12小题）.7．（3分）单项式的次数是．8．（3分）x、y两数的平方和减去它们的积的2倍，用代数式表示为．9．（3分）计算：x2•x3•x4＝．10．（3分）计算：（x2）5＝．11．（3分）比较大小：2543（填＞，＜或＝）．12．（3分）化简3a﹣[a﹣2（a﹣b）]+b，结果是．13．（3分）当1＜a＜2时，代数式|a﹣2|+|1﹣a|的值是．14．（3分）若a与b互为相反数，m和n互为倒数，则＝．15．（3分）已知单项式﹣a n b3与单项式﹣2a2b m﹣2是同类项，则m﹣n＝．16．（3分）若9×32m×33m＝322，则m的值为．17．（3分）如果两个关于x的多项式4x2﹣bx﹣5+c与ax2+2x﹣3相等，则a+bc＝．18．（3分）如图，四张大小不一的四方形纸片分别放置于矩形的四个角落，其中①和②纸片既不重叠也无空隙．已知矩形ABCD的周长为a，阴影部分的周长为b那么以下四个正方形中号正方形的边长可以直接用a、b表示，结果为．三、解答题（本大题共8小题，第19至24题每题6分，第25、26题每题8分，共52分）19．（6分）计算：9m2﹣4（2m2﹣3mn+n2）+4n2．20．（6分）计算：x2•x3+（﹣x）5+（x2）3．21．（6分）（a﹣b）2•（b﹣a）3•（b﹣a）（结果用幂的形式表示）22．（6分）已知多项式．（1）把这个多项式按x的降幂重新排列；（2）请指出该多项式的次数，并写出它的二次项和常数项．23．（6分）已知：m2+mn＝30，mn﹣n2＝﹣10，求下列代数式的值：（1）m2+2mn﹣n2；（2）m2+n2﹣7．24．（6分）化简求值，其中x＝2，y＝﹣0.5．25．（8分）已知（x3）n+1＝（x n﹣1）4•（x3）2，求（﹣n2）3的值．26．（8分）小王家买了一套新房，其结构如图所示（单位：m）．他打算将卧室铺上木地板，其余部分铺上地砖．（1）木地板和地砖分别需要多少平方米？（2）如果地砖的价格为每平方米k元，木地板的价格为每平方米2k元，那么小王一共需要花多少钱？参考答案一、单项选择题（本大题共有6小题，每题2分，共12分）1．（2分）下列不能表示“2a”的意义的是（）A．2的a倍B．a的2倍C．2个a相加D．2个a相乘解：2个a相乘表示为a2，故选：D．2．（2分）下列式子中，单项式是（）A．3a+1B．C．3a D．x＝1解：A、3a+1是多项式，故此选项不合题意；B、是分式，故此选项不合题意；C、3a是单项式，符合题意；D、x＝1是方程，故此选项不合题意．故选：C．3．（2分）下列各选项中是同类项的是（）A．﹣a2b和ab2B．a2和22C．﹣ab2和2b2a D．2ab和2xy解：A．﹣a2b和ab2相同字母的指数不相同，不是同类项；B．a2和22所含字母不相同，不是同类项；C．﹣ab2和2b2a所含字母相同，且相同字母的指数也相同，是同类项；D．2ab与2xy所含字母不相同，不是同类项；故选：C．4．（2分）下列运算正确（）A．a2+a3＝a5B．a2•a3＝a6C．（a2）3＝a8D．（﹣a）2•a3＝a5解：A．a2和a3不能合并，故本选项不符合题意；B．结果是a5，故本选项不符合题意；C．结果是a6，故本选项不符合题意；D．结果是a5，故本选项符合题意；故选：D．5．（2分）如果M＝x2+6x+22，N＝﹣x2+6x﹣3，那么M与N的大小关系是（）A．M＞N B．M＜N C．M＝N D．无法确定解：∵M＝x2+6x+22，N＝﹣x2+6x﹣3，∴M﹣N＝x2+6x+22﹣（﹣x2+6x﹣3）＝x2+6x+22+x2﹣6x+3＝2x2+25，∵x2≥0，∴2x2+25＞0，∴M＞N．故选：A．6．（2分）按下面的程序计算，如果输入x的值是30，那么输出的结果为（）A．470B．471C．118D．119解：当x＝30时，4x﹣2＝4×30﹣2＝118，∵118＜149，∴继续代入运算得：4×118﹣2＝470，故选：A．二、填空题（本大题共有12小题，每题3分，共36分）7．（3分）单项式的次数是3．解：单项式的次数是：3．故答案为：3．8．（3分）x、y两数的平方和减去它们的积的2倍，用代数式表示为x2+y2﹣2xy．解：x2+y2﹣2xy．故答案为：x2+y2﹣2xy．9．（3分）计算：x2•x3•x4＝x9．解：原式＝x2+3+4＝x9．故答案为：x9．10．（3分）计算：（x2）5＝x10．解：（x2）5＝x2×5＝x10．故答案为：x10．11．（3分）比较大小：25＜43（填＞，＜或＝）．解：∵43＝（22）3＝26，25＜26，∴25＜43，故答案为＜．12．（3分）化简3a﹣[a﹣2（a﹣b）]+b，结果是4a﹣b．解：原式＝3a﹣（a﹣2a+2b）+b＝3a﹣a+2a﹣2b+b＝4a﹣b，故答案为：4a﹣b13．（3分）当1＜a＜2时，代数式|a﹣2|+|1﹣a|的值是1．解：∵1＜a＜2，∴a﹣2＜0，1﹣a＜0，则原式＝2﹣a+a﹣1＝1，故答案为：114．（3分）若a与b互为相反数，m和n互为倒数，则＝．解：∵a与b互为相反数，∴a+b＝0，∵m和n互为倒数，∴mn＝1，∴（a+b）+mn＝×0+×1＝，故答案为：．15．（3分）已知单项式﹣a n b3与单项式﹣2a2b m﹣2是同类项，则m﹣n＝3．解：∵单项式﹣a n b3与单项式﹣2a2b m﹣2是同类项，∴n＝2，m﹣2＝3，解得：m＝5，∴m﹣n＝5﹣2＝3，故答案为：3．16．（3分）若9×32m×33m＝322，则m的值为4．解：∵9×32m×33m＝32×32m×33m＝32+2m+3m＝32+5m＝322，∴2+5m＝22，解得m＝4．故答案为：4．17．（3分）如果两个关于x的多项式4x2﹣bx﹣5+c与ax2+2x﹣3相等，则a+bc＝0．解：∵关于x的多项式4x2﹣bx﹣5+c与ax2+2x﹣3相等，∴a＝4，﹣b＝2，﹣5+c＝﹣3，解得b＝﹣2，c＝2，∴a+bc＝4﹣2×2＝0．故答案为：0．18．（3分）如图，四张大小不一的四方形纸片分别放置于矩形的四个角落，其中①和②纸片既不重叠也无空隙．已知矩形ABCD的周长为a，阴影部分的周长为b那么以下四个正方形中②号正方形的边长可以直接用a、b表示，结果为．解：根据题意得：阴影部分所有竖直的边长之和＝AB+CD，所有水平的边长之和＝（AD﹣②的边长）+（BC﹣②的边长），则阴影部分的周长＝（AB+CD+BC+AD）﹣②的边长×2，＝矩形ABCD的周长﹣②的边长×2，∵矩形ABCD的周长为a，阴影部分的周长为b，∴b＝a﹣②的边长×2，∴②的边长＝，故答案为：．三、解答题（本大题共8小题，第19至24题每题6分，第25、26题每题8分，共52分）19．（6分）计算：9m2﹣4（2m2﹣3mn+n2）+4n2．解：原式＝9m2﹣8m2+12mn﹣4n2+4n2＝m2+12mn．20．（6分）计算：x2•x3+（﹣x）5+（x2）3．解：x2•x3+（﹣x）5+（x2）3＝x5﹣x5+x6＝x6．21．（6分）（a﹣b）2•（b﹣a）3•（b﹣a）（结果用幂的形式表示）解：（a﹣b）2•（b﹣a）3•（b﹣a）＝（b﹣a）2•（b﹣a）3•（b﹣a）＝（b﹣a）2+3+1＝（b﹣a）6．22．（6分）已知多项式．（1）把这个多项式按x的降幂重新排列；（2）请指出该多项式的次数，并写出它的二次项和常数项．解：（1）按x降幂排列为：；（2）该多项式的次数是5，它的二次项是xy，常数项是．23．（6分）已知：m2+mn＝30，mn﹣n2＝﹣10，求下列代数式的值：（1）m2+2mn﹣n2；（2）m2+n2﹣7．解：（1）∵m2+mn＝30，mn﹣n2＝﹣10，∴m2+2mn﹣n2＝（m2+mn）+（mn﹣n2）＝30+（﹣10）＝20（2）∵m2+mn＝30，mn﹣n2＝﹣10，∴m2+n2﹣7＝（m2+mn）﹣（mn﹣n2）﹣7＝30﹣（﹣10）﹣7＝3324．（6分）化简求值，其中x＝2，y＝﹣0.5．解：原式＝4x﹣6y﹣2﹣3x﹣2y+2＝x﹣8y，当x＝2，y＝﹣0.5时，原式＝2+4＝6．25．（8分）已知（x3）n+1＝（x n﹣1）4•（x3）2，求（﹣n2）3的值．解：∵x3n+3＝x4n﹣4•x6，∴3n+3＝4n﹣4+6，解得n＝1，∴（﹣n2）3＝（﹣12）3＝﹣1．26．（8分）小王家买了一套新房，其结构如图所示（单位：m）．他打算将卧室铺上木地板，其余部分铺上地砖．（1）木地板和地砖分别需要多少平方米？（2）如果地砖的价格为每平方米k元，木地板的价格为每平方米2k元，那么小王一共需要花多少钱？解：（1）木地板的面积为2b（5a﹣3a）+3a（5b﹣2b﹣b）＝2b•2a+3a•2b＝4ab+6ab＝10ab（平方米）；地砖的面积为5a•5b﹣10ab＝25ab﹣10ab＝15ab（平方米）；（2）15ab•k+10ab•2k＝15abk+20abk＝35abk（元），答：小王一共需要花35abk元钱．。
上海市第四教育署2020-2021学年七年级(五四制)上学期期中英语试题(原卷版)
2020学年度第一学期期中教学质量自主调研七年级英语(满分∶100分考试时间∶75分钟)Part1Listening(第一部分听力)I.Listening Comprehension(听力理解)A.Listen and choose the right picture.(根据你听到的句子，选出相应的图片)A. B. C. D. E.F.1._________2._________3._________4._________5._________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6.A.Cats. B.Dogs. C.Birds. D.Parrots.7.A.A.driver. B.A postman. C.A fireman. D.A policeman.8.A.In a flat. B.In an estate agency. C.In the suburb. D.In a shop.9.A.Half an hour. B.10minutes. C.40minutes. D.50minutes.10.A.Tonight. B.Tomorrow morning. C.Tomorrow evening. D.Today.11.A.80yuan. B.100yuan. C.90yuan. D.10yuan.12.A.Her friend. B.Her sister. C.Her mum. D.Herself.13.A.The football match was exciting. B.Alice watched the football match with Jason. C.Jason likes the football match. D.Alice doesn't like the football match.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)14.The elephants are clever and useful to people in Thailand.15.The elephants are so clever that they can take photos for people.16.People in Thailand celebrate Elephant Day on the third weekend of December.17.On Elephant Day the elephants stop working and have a rest.18.Elephants can wear colourful clothes during the festival.19.Elephants enjoy themselves on that day.D.Listen to the passage and complete the sentences.(听短文，完成下列句子)20.The reason why people go hiking is__________________person to person.21.First of all,hiking is___________________exercise,which will improve people's health.22.Finally,hiking is the best way to__________________from everyday life.Part2Phonetics,Vocabulary and grammar(第二部分语音、词汇和语法)II.Look at the phonetic symbol and fill in the blanks.(看音标写单词)1.Xi'an is an ancient city with a long________.[ˈhɪstri]2.This school accepts over200________students every year.[ˌɪntəˈnæʃnəl]3.A terrible________[ˈæksɪdənt]happened in Wuxi last month.4.Go straight ahead and you can see it________the post office.[ˈɒpəzɪt]5.The hospital supplies________care for elderly patients.[ˈspeʃl]III.Choose the best answer(选择最恰当的答案)6.Kitty and her family will have________8-day trip to Australia.A.aB./C.anD.the7.We are going to visit my uncle and aunt________the end of this month.A.onB.inC.byD.at8.—________is it from Shanghai to Beijing?—Two hours’flight.A.How longB.How soonC.How farD.How fast9.There are over________people travelling to Hainan every day.A.three thousandB.three thousandsC.thousand ofD.thousands of10.He saw a girl________an old woman cross the road on his way home.A.helpedB.helpsC.helpingD.to help11.My brother made quite________mistakes in the test,and he got only a"C".A.littleB.a fewC.fewD.a little12.Helen is talking________me________the movie she saw last night.A.with;forB.to;aboutC.to;withD.with;of13.Mr.Li has invited us________dinner with his family this weekend.A.haveB.havingC.to haveD.to having14.All the stones which our Chinese has collected look________.A.lovelyB.gentlyC.quietlyD.beautifully15.The bedroom in my new flat is________than that in my old flat.A.much biggerB.more biggerC.more bigD.much more bigger16.I can’t go cycling with you________I have too much homework to do.A.butB.soC.becauseD.though17.--Mr.Brown,must we hand in our work today?--No,you.But you must bring it to school tomorrow.A.mustn’tB.needn’tC.may notD.couldn’t18.—________should I feed my puppy?—Three or four times a day.A.How oftenB.How soonC.How muchD.How much time19.—Let’s go to the park and have a picnic this coming Saturday.—________A.You are welcome.B.That’s all right.C.Thank you.D.That’s a good idea.20.--Would you please lend me a hand with my heavy suitcase?--_________.A.Not at all.B.That’s all right.C.Sure.D.Thank you.plete the following passage with the words or phrases in the box.Each can only be used once(将下列单词或词组填入空格，用A、B、C、D等表示。
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
上海市浦东新区第四教育署2020-2021学年七年级（五四学制）6月阶段考试英语试题学校:___________姓名：___________班级：___________考号：___________一、根据音标写单词Look at the phonetics and complete the blanks（根据所给音标完成句子）1．A headmaster is in ________ of a school. [t∫ɑ:dʒ]2．Can I try on that jeans, this pair is too short and ________. [taɪt]3．It is ________ to walk in wet and dirty street. ['ɔ:fl]4．I’d like to have more ________ and trips to other places. [æk'tivitiz]5．We all know the ________ between Mr. Wind and Mr. Sun. [,kɒmpə'tI∫n]二、单选题6．Which of the following underlined parts is different from others?A．They can buy things in large shopping malls.B．There are a number of department stores on Nanjing Road.C．It’s getting w armer because spring is coming.D．Tim grows many flowers in his garden.7．Which of the following is right?A．Kitty and her classmates have just been to Shanghai. ↗B．Turn left, you will see City Cinema on your right. ↗C．Which shops are you going to? ↘D．Will we live on another planet in the future? ↘8．There is ________ ‘h’ in the word ‘honest’.A．an B．a C．the D．/9．Is this kite ________? No, ________ kite is under the desk.A．you, my B．your, mine C．you, me D．yours, my 10．We can see sailing boats lean and speed over the sea ________ windy days.A．in B．on C．of D．at11．We should eat ________ vegetables and ________ junk food.A．more, less B．less, moreC．fewer, little D．much, more12．The old man looked ________ when he heard the bad news.A．disappointed B．happily C．excited D．glad13．We ________ buy bread and cakes, there are some in the fridge.A．don’t need to B．don’t need C．need D．need to 14．Animals start ________ because winter is comingA．sleep B．sleeping C．sleeps D．slept 15．The sun is shining, ________ nice weather it is!A．how a B．what a C．what D．how 16．The grasshopper went out to ________ food, but he ________ nothing.A．look at, found B．look for, foundC．find, looked for D．find, looked after17．Judy can draw as ________ as Lucy.A．more beautiful B．more beautifullyC．beautiful D．beautifully18．My father ________ a policeman for quite a few years.A．has been B．was C．is D．be 19．Water turns into steam ________ it boils.A．when B．until C．although D．while20．—I think Mr. Wind is stronger than Mr. Sun. —________.A．I think not B．I don’t think soC．So did I D．Neither do I三、用单词的正确形式完成短文The Olympic Winter Games Beijing 2022 will ______ in February 2022, together with the Chinese New Year (Spring Festival), the most important holiday in China. ______ people are looking forward to welcoming sportsmen from around the world to enjoy the Chinese New Year festivals, the ______ buildings and the rich cultures of Beijing.This is the ______ time for China to hold the Winter Olympics, and the third time to host an Olympics following the Beijing 2008 Olympics and the Nanjing 2014 Youth Olympics. The 24th Winter Games will _______17 days from February 4th to 20th. Ice sports will be held in five venues (比赛场所) in downtown Beijing. ______ , Beijing will be the first city in the world to stage both Summer Olympics and Winter Olympics.21．________22．________23．________24．________25．________26．________四、用所给单词的正确形式填空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）：27．Jimmy got a wonderful present on his ________ birthday. (nine)28．Although Kitty is 12 years old, she can do most housework ________. (she)29．To make a water boat, we need some tape and pieces of ________ paper. (color) 30．Alice is my good friend, we always share our ________ and sadness. (happy) 31．Driver should drive much more ________ when it rains. (safe)32．Look at these ________! I took them in Beijing. (photo)五、句型转换Rewrite the sentences as required（根据所给要求改写句子，每空限填一词）：33．I would like to have less homework in the future. （改为疑问句）________ ________ like to have less homework in the future?34．We can live under the sea in 50 years’ time. （保持原句意思）We ________ ________ to live under the sea in 50 years’ time.35．Lily often practices playing violin after school. （就划线部分提问）________ does Lily often practice ________ after school?36．Danny spent too much money on picture books.（改为反义疑间句）Danny spent too much money on picture books, ________ ________?37．your, pieces of, write down, hopes, on, paper. （连词成句）______________________________________________________________________六、阅读单选Life in the future will be different. Many changes will happen. But what will the changes be? The population (人口) is growing fast. There will be many people in the world and most of them will live longer than people live now.Computers will be much smaller and more useful, and there will be at least (至少) one in every room. And computer studies will be one of the important subjects in schools then. People will work fewer hours than they do now and they will have more free time for sports, watching TV and travel. Traveling will be much cheaper and easier. And many more people will go to othercountries for holidays.There will be changes in our food, too. More land will be used for building new towns and houses for all the people. Then there will be less room for cows and sheep, so meat will be more expensive. Maybe no one will eat it every day. Instead they will eat more fruit and vegetables. Maybe people will be healthier. Work in the future will be different, too. Robots will do dangerous and hard work. Because of this, many people will not have enough work to do. This will be a problem.38．In the future there will be ______.A．much more fruit B．more people C．less vegetables D．less people 39．Every family will have at least a ______ in the future.A．robot B．cow C．TV set D．computer 40．In the future people don’t hav e to ______.A．work long hours B．work fast C．walk on foot D．eat meat 41．People may not eat ______ as much as they do today.A．fruit B．fish C．meat D．rice42．One big problem in the future is that ______.A．many people don’t have to workB．many people will not be able to find workC．people have to work fastD．all the work will be done by robots七、完型填空Here are some important rules for you to become a good student at school.◆ Go to school on timeAs a 43 , going to school on time is very important. If you are late, you will not start your lesson at the same time with your classmates so that you will miss some lessons which can influence (影响) your grades. If you are late the teacher will be 44 with you too. So remember to go to school on time.◆ Follow the school rulesDo not 45 the school rules. For example you are not allowed to chew gum or sleep in class. Don’t fight with your classmates and you should be friendly to your classmates and your teachers and be ready to help others who are in trouble. You 46 run in the hallway (走廊).◆ Prepare (准备) lessons before class47 you want to know what you will learn next day, you’d better prepare lessons. Itis good for your study and it can help you get good grades. Besides you should listen to the teachers as carefully as possible.◆ Take part in all kinds of activities at schoolTry to be in all kinds of activities at school. For example sports can not only improve the relationship between you and your classmates but also make you healthier.48 is easy to follow the school rules and you will become a good student. 43．A．classmate B．teacher C．volunteer D．student 44．A．pleased B．angry C．strict D．popular 45．A．break B．make C．change D．follow 46．A．must B．mustn’t C．needn’t D．can 47．A．If B．Although C．Unless D．After 48．A．This B．It C．That D．We八、单词填空“Make-A-Wish” is o49．of the world’s most well-known charities (慈善机构). It makes wishes come true for children who have some illnesses. It gives them hope and helps them forget about their h50．problems.Christopher was a 7-year-old boy, he was very sick. He always dreamed of becoming a pilot to fly in the sky. They gave Christopher a tour of the city in a police helicopter and b51．a space helmet (头盔) for him.There are four kinds of wishes children usually have:I wish to go.Children u52．want to visit some places of interest, like the Statue of Liberty.I wish to meet.Children sometimes want to meet their f53．film stars or sports players.I wish to be.Some children wish to become doctors to help people who don’t have money for medical treatment. (治疗)I wish to have.Some children want to have a computer, a bike or many o54．things.Let’s hope more wishes will come true in the future. People who work in the charity always try for the best. Will you be one of them?九、回答问题Stan Lee, who helped create Spiderman, the X-Men, Iron Man, the Incredible Hulk(绿巨人), Black Panther (黑豹), and many other comic book heroes, has died at the age of 95. Stanley Martin Lieber was born in 1922. When he was just 17, he got a job at a company that made comic books. As a writer, he started using the name—Stan Lee Ⅱ (which sounded like his first name, Stanley). He wrote his first Captain America story in 1941. It was very popular. Before he was 19, he was responsible for all writing for the company, which became Marvel Comics (漫威漫画公司) in the1960s. At the time, most superheroes were almost perfect. They were strong and smart and always knew the right thing to do. However, after working with some artists, Mr. Lee had some new ideas. He made it okay for comic book heroes to have weaknesses. The Incredible Hulk was a really nice guy until he got angry. Spider-Man was never sure he was doing the right thing, but he always seemed to have something funny to say to the bad guys. In 1980, Mr. Lee moved to California. He wanted to try and get his superheroes onto TV and into the movies. Marvel movies have now earned over $24 billion. Mr. Lee has played a small role in most of these movies, usually showing up (出现)on screen for just a few seconds. Mr. Lee is no longer with us, but the heroes he created live on.55．Who created many comic book heroes?56．Did he get a Job at a company that made comic books in 1939?57．What were the new ideas about after Mr. Lee working with some artists?58．How much did Marvel movies earn?59．What do you think of Mr. Lee?十、话题作文60．Write at least 50 words on the topic ‘________ makes me happy’ （以“________让我开心”为题，写一篇不少于50个单词的短文，要求内容适切，意思连贯，标点符号不占格。