2017-2018 七上 江苏省南京市玄武外国语学校2017
2017-2018学年南京外国语七上10月考英语试卷与答案(word版含答案)

2017-2018学年南京外国语七上10月考英语试卷与答案(word版含答案)2017 – 2018 初一上南外10 月月考试卷卷Ⅰ客观题(满分60 分)Ⅰ. Multiple choice (1% x 15 = 15%)1. Which one contains the same sound as ‘great’ in the underlined part?A. eggB. breakfastC. planeD. says2. Which one contains a different sound in the underlined part?A. mouthB. groundC. aboutD. could3. Which one contains the sound of /?/ in the underlined part?A. busyB. fly D. be D. elephant4. Some students play basketball on the playground and some students learn to play violin in the music room after school.A. the; theB. /; /C. the; /D. /; the5. Students at NFLS each three PE lessons every week.A. hasB. haveC. is havingD. are having6. --- Have you got an iPhone X?--- . People can’t buy it until November 3rd.A. Yes, I haveB. Yes, I doC. No, I haven’tD. No, I don’t7. If you still can’t understand (理解) the problem, you can find more information the internet orthe book.A. in; onB. in; inC. on; onD. on; in8. Claire loves English so much that she spends half an hour English every night.A. readB. to readC. readingD. reads9. Every noon, he enjoys alone at the canteen because he hates to others talking about gossips (闲言碎语).A. eating; listenB. eating; listeningC. eat; listenD. eat; listening10. Eton College (伊顿公学) is a top school in Britain. It was founded (建立) by Henry Ⅵin 1440.A. all-boysB. all boysC. all-boyD. all boys’11. The dining hall is of our school.A. in southwestB. in the southwestC. to the southwestD. on southwest12. Bees have to fly many kilometres and lots of flowers.A. drinkB. eatC. smellD. visit13. That shy girl is nervous when she sees her teacher.A. a littleB. a bitC. a little bitD. A. B & C14. Which of the following sentences is right?A. Students at NFLS all are over 11 years old.B. Students at NFLS are all over 11 years old.C. Students at NFLS are over 11 years old all.D. All students at NFLS are over 11 years old.15. Which of the following sentences is right according to the textbook (根据课本)?A. Caroline studies two or three languages at Park School.B. Claire feeds her bees at 8: 30 every day in the spring.C. Claire is a 15-year-old girl from England.D. Students have to pay if they want to join some clubs at Park School.Ⅱ. Find out the mistake in each sentence. (1% x 10 = 10%)16. It is reported that over three millions people travel to cities in Jiangsu Province during the National DayA B C Dholiday.17. He likes films very much, so he goes to cinema three times a week with his girlfriend.A B C D18. He buys 200 kilo’s mooncakes for the old people in the nursing home (养老院) when the Mid-Autumn FestivalA B Ccomes every year.D19. She is always very busy on Monday. Sometimes, she even hasn’t lunch.A B C D20. At the weekends, some families often goes to the central park to have a picnic.A B C D21. Students often sail in Xuanwu Lake to have fun in summer.A B C D22. She’s not got enough time to do sports from Monday to Thursday because she has a lot of homework to do.A B C D23. Kate is very excited because she will join the riding-horse club with her best friends.A B C D24. Students feels very happy for there are a lot of delicious dishes (菜) for them to choose at the dining hall everyA B C Dnoon.25. Richard usually goes to school in his father’s car, but sometimes he went to school by bus.A B C DⅢ. Cloze test (1% x 15 = 15%)Before Father’s Day, I found my father was unhappy because he was out of work. I decided (决定) to make him 26 by buying him a special Father’s Day present.One day after school I 27 to the Agins which was 28 for fashions and styles. I told the shopkeeper that I was looking 29 a Father’s Day present.“Do you think he’d like a 30 ?” she asked. “I think he might.” I told her.She took out a Swiss watch and I 31 her that would like it.“How much money do you have?” she asked.“32 dollars.”I replied.“You’re so lucky!”she told me. “It’s only $11. You 33 have $1 for the 34 . “Sh e packed (包装) the watch and I thanked her a lot. Then I rode off home with the gift under my arm.When my father opened the gift, he was 35 asked. “Where did you get it?”“I bought it at the Agins. I cost me $11.” I said. My father was shocked (震惊的) into silence(沉默).Many years 36 , I learned that the watch was worth (值) several hundred dollars, 37 I appreciated(赞赏) how wonderful Agins had been to me. I always felt 38 that I never had a chance to thank that shopkeeper.“What really surprises me on that day... my daughter.”My fat her said, “Le t ting you 39 _ the watch for 11 dollars wasunbelievable (难以置信的) enough. But the fact that she let you leave the store with a dollar for thel never 40 it.”card was a touch of kindness. I’l26. A. happy B. angry C. sad D. brave27. A. drove B. took C. rode D. started28. A. good B. had C. famous D. important29. A. into B. for C. after D. at30. A. watch B. bike B. clock D. card31. A. told B. asked C. said D. answered32. A. Thirteen B. Twelve C. Eleven D. One33. A. only B. must C. still D. never34. A. card B. store C. present D. style35. A. sad B. surprised C. angry D. quiet36. A. ago B. late C. after D. later37. A. or B. but C. and D. so38. A. sorry B. thankful C. careful D. useful39. A. see B. borrow C. have D. keep40. A. remember B. forget C. use D. like。
南京市玄武区2017-2018学年第一学期七年级数学期中试卷

2017-2018学年度第一学期期中学情调研试卷七年级数学注意事项:1.全卷满分100分.考试时间为100分钟.考生答题全部答在答题卡上,答在本试卷上无效.2 •请认真核对监考教师在答题卡上所粘贴条形码的姓名、考试证号是否与本人相符合,再将 自己的姓名、准考证号用 0.5毫米黑色墨水签字笔填写在答题卡及本试卷上.3 •答选择题必须用 2B 铅笔将答题卡上对应的答案标号涂黑•如需改动,请用橡皮擦干净后, 再选涂其他答案•答非选择题必须用 0.5毫米黑色墨水签字笔写在答题卡上的指定位置,在其他位置答题一律无效.4 •作图必须用2B 铅笔作答,并请加黑加粗,描写清楚.、选择题(本大题共8小题,每小题2分,共16分•在每小题所给出的四个选项中,恰有 一项是符合题目要求的,请将正确选项前的字母代号填涂在答题卡 —3的相反数是1B. 3n a%单项式 h 的系数、次数分别是37.下列说法正确的是A.平方等于它本身的数只有 1B. —个数乘以这个数的立方,结果不可能是负数C. 绝对值等于它本身的数一定是正数D. 倒数等于它本身的是 1或一1或0相应位置上)D.— 31. A . 32. 去年“双11 ”, 9A . 3.5 X 10淘宝日总销售额超过 9B . 35X 10350亿元,350亿用科学记数法表示为10C. 3.5 X 1011D. 0.35 X 103. 11 在数0,— 7 n—,0. 13 , 0.101 001 0001…(相邻两个3之间依次增加1个0) , 2.3%4. 5. 中,有理数有 A . 5个下列各组数中结果相同的是 A . 32与 23B . | — 3| 3与(一3)3B . 4个C.C. (—3)2 与一32D. 2个D. ( — 3)3与一33A . x + 3= y1B . - + 3= 2xX C. 2y = 5+ y2D. - — 4- + 4 = 06. 1A . 3,3n B . 3,21 c. 3,2n D. §, 3&如果y 是一个负数,并且|x | v — y ,则下列关系正确的是得x = 2,则该方程的正确解应为 x = ▲18.观察下列一组图形,其中图形①中共有 2颗星,图形②中共有 6颗星,图形③中共有 119小题,共64分.请在答题卡指定区域 内作答,解答时应写出文字说明、证明过程或演算步骤)19. ( 4分)在数轴上画出表示一1,— 3,3, | — 2|的点,比较它们的大小,并用“V”号连A . x + y v 0B . x — y v 0C. xy v 0x D. v 0y、填空题(本大题共 10小题,每小题 2分,共20分.不需写出解答过程,请把答案直接填写在答题卡相应位置上)1 9.— 3的倒数是 ▲ .10. 将高于平均水位 2 m 记作“+ 2 m ”,那么低于平均水位 0.5 m记作 ▲.11. 在数轴上将点 A 从原点出发先向左移动 8个单位,再向右移动 12个单位,则点A 表示的数是 ▲.12.如图,若输入的值为一 3,则输出的结果是 ▲ .13.若alo 与ab 2n 为同类项,贝Un — m=▲ .2214. 已知 3x — x = 2,则 5— 2x + 6x 的值为 ▲ .15 .有5张写着不同数字的卡片习、三、叵、E!、EZ从中抽取2张卡片,使这2张卡片上的数字相除的商最小,最小的商是★★ ★ ★ ★ ★★ ★ ★★★★ ★★★★★★★*★★★★★①②③ (第18题)④17.小明同学在解方程 3x + 3=()x —1时,把“()”处的数字写成了它的相反数,解颗星,图形④中共有 17颗星,,按此规律,图形⑧中星星的颗数是三、解答题(本大题共 (第 12题)(第 16 题)★20 •计算(每题4分,共12 分) (1) ( — 2) + 4+( — 2) - ( — 3);1 5 5 1(2) — 2+二一 __ . 2 6 1224 '20181 3(3)— 1— 0.75 十 3 x[4 — ( — 2)].21 •计算(每题4分,共8分) (1) 3a + 2b — (5 a + b );22 .解下列方程(每题 4分,共8分) (1) 2(x + 1) = 3(x + 1);24. ( 6分)某食品厂生产的袋装食品标准质量为每袋 453g ,从中抽出样品6袋,检测每袋的质量是否符合标准,超过或不足的部分分别用正、负数来表示,记录如表:(1)▲ 若该种食品合格标准为 453土 5g ,则样品中合格的袋数有 ▲ 袋. (2) 抽样检测的6袋食品样品的平均质量是多少克?2 2 2 2 2 2(2) 3 a b + a b — (2 a b — 2ab ) + 2(3 ab — a23. ( 5分)先化简,再求值: 1 ?x — 2 x —f x + 1y 2,其中 x — 3, y=|.25. ( 7分)小王驾车从 A 地出发,在一条东西万向的道路上行驶,先行驶 a 千米,接着又行驶(a + 1)千米,最后行驶(2 - 3a )千米后停止行驶•规定:向东行驶记作正,向西行驶记 作负•例如:行驶—1千米,即向西行驶1千米.(1 )当a = — 4时,小王最后停在 A 地 ▲ (填“东”或“西”)侧 ▲ 千米的位置; (2)当a = ▲ 时,小王最后恰好停在 A 地;(3) 小王驾车平均每千米耗油 0.1升,当a v — 1时,求小王驾车共耗油多少升.(用含a 的代数式表示)26. ( 7分)如图,一个4X 3的长方形可用4种不同的方式分割成 4或6或9或12个正方形,□□ □□□□ 或(第26题)(1) 一个5X 3的长方形用不同的方式分割后,正方形的个数最少是 ▲ 个; (2) —个6X 3的长方形用不同的方式分割后,正方形的个数最少是▲个;(3) —个n x 3的长方形(n 为大于3的整数)用不同的方式分割后,正方形的个数最少 是多少个?(用含 n 的代数式表示)27. ( 7分)在数轴上有 A B M 三点,点M 与点A 、B 之间的距离相等.(1 )若A B 两点表示的数分别为一12、8,则点M 表示的数为 ▲;(2)已知点 A B 的运动方式如下:点A 沿着数轴从数字-12处以每秒3个单位长度的速度向右匀速运动, 点B 沿着数轴从数字8处以每秒2个单位长度的速度向左匀速运动.设运动时间为t (t 丰4). ① 点M 表示的数为▲;(用含t 的代数式表示)② 参照(2)中的描述方式,请直接写出点 M 的运动方式.□□□ □□□□ □□□□ □□□□2017-2018学年度第一学期期中学情调研试卷七年级数学参考答案及评分标准说明:本评分标准每题给出了一种或几种解法供参考,如果考生的解法与本解答不同,参照本评分标准的精神给分.19. —3 10 . —0.5m 11 . 4 12 . 3 13.—㊁214. 9 15 .—16 . (4 — n )a 17三、解答题(本大题共9小题,共64分)19.(本题4分)解:图略2分—|<— 1 V | —2| V 3 4 分20 .计算(每题4分,共12分)(1) 解:原式=(—2) —2+ 3 2 分=—4 + 3=—1 . 4 分”、 1 5 5、(2) 解:原式=2 X ( —24) —2 X ( —24) + 6 X ( —24) —X ( —24) 2 分=—12 + 48—20+ 10=26.3(3) 解:原式=-1-4X3X (4+8)=—1 —27 3 分=—28 . 4 分21.计算(每题4分,共8分)(1) 解:原式=3a+ 2b—5a—b 2 分=—2a+ b. 4 分(2) 解:原式=4a2b —2a2b+ 2ab2+ 6ab2—2a2b 2 分18 . 51(2) (3) =4a 2b — 2a 2b — 2a 2b + 2ab 2+ 6ab 22=8ab . 4 分22 .解下列方程(每题 4分,共8分)(1) 解:2x + 2= 3x + 3 2 分—x = 1x =—1. 4 分(2) 解:3x — (4x — 1) =— 3 2 分3x — 4x + 1 = — 3—x = — 4x = 4.4 分23. ( 5 分)1 2 2 3 1 2解:原式= 产 —2x + 3 —於+ 彩 2分 1c 3 2 2 1 2 =歹—2x — ^x + + =—3x + y 2.3 分3当 x = — 3, y = 时, 原式=—3x + y3=—3X ( — 3) +45 415,3;1(2) 453 + -X6=454g .答:抽样检测的6袋食品样品的平均质量是454g .25. ( 7 分) (1): 东;3; 解:24.( 6分)解:(1):—8+ 2+ 6 + ( — 1) + 0+ 7]4 分(2)(3)7; 2分3分因为a v—1,所以a+ 1为负数,2 —3a为正数. 小王驾车行驶的总路程:|a| + | a + 1| + |2 —3a| 5 分=-a—(a+1) + (2 —3a)=1 —5a 6 分答: 1 一5a当a v—1时,小王驾车共耗油10升.7分26. ( 7 分)(1) 4; 2分(2) 2; 4分(3 )当n能被3整除时,分割后正方形的个数最少是n八3个;5分当n除3余1时,分割后正方形的个数最少是—个;6分n I 7当n除3余2时,分割后正方形的个数最少是 p个. 7分27. ( 7分)(1)—2; 2 分t —4(2)~^~; 4 分1(3)点M沿着数轴从数字-2处以每秒㊁个单位长度的速度向右匀速运动.。
江苏省南京市南京外国语学校2017-2018年七年级上语文期末试题(解析版)

南京外国语学校2017~2018 学年度第一学期期末初一年级语文试题(卷)注意事项:1.本试卷6 页,共100 分。
考试时间120 分钟。
2.所以答案一律用钢笔或圆珠笔(蓝色或黑色)写在答题纸上,不能写在本试卷上,否则为无效。
一1. 请将下面语句用楷书或行书准确、规范、美观地书写在田字格内。
学问不思则罔,思而不学则怠【答案】工整书写即可【解析】此题考查学生的书写能力。
书写时做到正确、工整、美观即可。
注意书写时将字写在田字格中间,大小要合适。
注意“罔、怠”这两个字的结构,不能在方格中把这两个字写得太长,要做到字体方正。
2. 根据课文默写名句及作者。
(1)子曰: ________,于我如浮云.《论语·述而》(2)____________,洪波涌起,(曹操《观沧海》)(3)____________,影入平羌江水流。
(李白《峨眉山月歌》)(4)____________,一夜征人尽望乡。
(李益《夜上受降城闻笛》)(5)____________,铁马冰河入梦来。
(陆游《十一月四日风雨大作》)(6)晴空一鹤排云上,___________(刘禹锡《秋词》)(7)那隔着河的牛郎织女,_____________(郭沫若的《天上的街市》)(8)但只要有这点精神,就是一个高尚的人,一个纯粹的人,一个有道德的人,一个脱离了低级趣味的人,____________。
(毛泽东《纪念白求恩》)【答案】(1). (1)不义而富且贵(2). (2)秋风萧瑟(3). (3)影入平羌江水流(4). (4)不知何处吹芦管(5). (5)夜阑卧听风吹雨(6). (6)便引诗情到碧霄(7). (7)定能够骑着牛儿来往(8). (8)一个有益于人民的人【解析】这是考查学生默写古诗文的能力。
复习古诗文名句,首先是要熟练背诵古诗文名篇、名段和名句;其次是要字字落实,默写中不能出现错别字、更不能丢字添字;第三是要正确理解古诗文篇段和名句的大意和基本内容。
南京玄武区外国语学校语文新初一分班试卷含答案

南京玄武区外国语学校语文新初一分班试卷含答案基础运用。
看拼音,写字词。
zhǎ yǎn( )间,又到了áo( )là bā zhōu( )的时候,妈妈准备了栗子、枣、葡萄干、小米等八种食材。
我一直在厨房外pái huái( ),不肯nuó yí( )一步。
锅里的东西在妈妈的jiǎo huo( )下变得越来越浓chóu( ),一个个冒起的气泡慢慢地zhàn kāi( )。
我再也忍不住了,yī wēi()在妈妈身旁,不停niàn dɑo地( ):“妈妈,妈妈,什么时候可以吃呀?”妈妈笑着说:“小馋猫,等你摆好了碗筷就可以吃了。
”下列加点字的注音全部正确的一项是()A.讷.(nè)于言,敏.(mǐn)于形.(xíng),学贵在实践.(jiàn)B.昼.(zhòu)出耘.(yú)田夜.(yiè)绩.(jī)麻C.酒需酝.(wēn)酿.(ráng)成,人要锻.(duàn)炼.(niàn)好D.女娲.(wā)捏.(liè)土造人,只是个美丽的传.(zhuàn)说.(shuō)下列每组词语书写完全正确的一组是()A.狂风怒号废然大物顾影自怜斩钉截铁B.罪魁祸首小心翼翼妙笔生花全神惯注C.和蔼可亲威风凛凛汹涌澎湃意味生长D.饱经风霜黄钟大吕画龙点睛余音绕梁诗词也经常使用修辞手法,下列完全正确的一项是()①咬定青山不放松,立根原在破岩中。
②欲问行人去那边?眉眼盈盈处。
③大漠沙如雪,燕山月似钩。
④野径云俱黑,江船火独明。
A.夸张设问比喻拟人B.夸张设问拟人比喻C.拟人设问夸张比喻D.拟人设问比喻对比下面一组句子中,没有语病的一句是()A.在老师的帮助下,他的作文水平进步了。
B.只要你为大家做好事,才会得到大家的信任。
C.我们认真听取并讨论了校长的报告。
南京玄武区外国语学校七年级上册数学期末试卷及答案-百度文库

南京玄武区外国语学校七年级上册数学期末试卷及答案-百度文库一、选择题1.-2的倒数是( ) A .-2B .12-C .12D .22.下列方程是一元一次方程的是( ) A .213+x =5x B .x 2+1=3x C .32y=y+2 D .2x ﹣3y =13.探索规律:右边是用棋子摆成的“H”字,第一个图形用了 7 个棋子,第二个图形用了 12 个棋子,按这样的规律摆下去,摆成 第 20 个“H”字需要棋子( )A .97B .102C .107D .1124.在直线AB 上任取一点O ,过点O 作射线OC 、OD ,使OC ⊥OD ,当∠AOC=40°时,∠BOD 的度数是( ) A .50° B .130° C .50°或 90° D .50°或 130° 5.已知关于x 的方程ax ﹣2=x 的解为x =﹣1,则a 的值为( ) A .1B .﹣1C .3D .﹣36.点()5,3M 在第( )象限. A .第一象限 B .第二象限 C .第三象限 D .第四象限 7.观察一行数:﹣1,5,﹣7,17,﹣31,65,则按此规律排列的第10个数是( ) A .513B .﹣511C .﹣1023D .10258.图中是几何体的主视图与左视图, 其中正确的是( )A .B .C .D .9.如果韩江的水位升高0.6m 时水位变化记作0.6m +,那么水位下降0.8m 时水位变化记作( ) A .0mB .0.8mC .0.8m -D .0.5m -10.如图,C ,D 是线段AB 上两点,若CB =4cm ,DB =7cm ,且D 是AC 的中点,则AC 的长等于( )A .3 cmB .6 cmC .11 cmD .14 cm11.下列计算正确的是( )A.3a+2b=5ab B.4m2n-2mn2=2mnC.-12x+7x=-5x D.5y2-3y2=212.如图,4张如图1的长为a,宽为b(a>b)长方形纸片,按图2的方式放置,阴影部分的面积为S1,空白部分的面积为S2,若S2=2S1,则a,b满足()A.a=32b B.a=2b C.a=52b D.a=3b二、填空题13.已知|x|=3,y2=4,且x<y,那么x+y的值是_____.14.把四张形状大小完全相同的小长方形卡片(如图1)按两种不同的方式,不重叠地放在一个底面为长方形(一边长为4)的盒子底部(如图2、图3),盒子底面未被卡片覆盖的部分用阴影表示.已知阴影部分均为长方形,且图2与图3阴影部分周长之比为5:6,则盒子底部长方形的面积为_____.15.5535______.16.36.35︒=__________.(用度、分、秒表示)17.苹果的单价为a元/千克,香蕉的单价为b元/千克,买2千克苹果和3千克香蕉共需____元.18.小明妈妈支付宝连续五笔交易如图,已知小明妈妈五笔交易前支付宝余额860元,则五笔交易后余额__________元.支付宝帐单日期交易明细10.16乘坐公交¥ 4.00-10.17转帐收入¥200.00+10.18体育用品¥64.00-10.19零食¥82.00-10.20餐费¥100.00-19.如图,这是一种数值转换机的运算程序,若第一次输入的数为7,则第2018次输出的数是_____;若第一次输入的数为x ,使第2次输出的数也是x ,则x =_____.20.15030'的补角是______.21.学校组织七年级部分学生参加社会实践活动,已知在甲处参加社会实践的有27人,在乙处参加社会实践的有19人,现学校再另派20人分赴两处,使在甲处参加社会实践的人数是乙处参加社会实践人数的2倍,设应派往甲处x 人,则可列方程______.22.某校全体同学的综合素质评价的等级统计如图所示,其中评价为C 等级所在扇形的圆心角是____度.23.通常山的高度每升高100米,气温下降0.6C ︒,如地面气温是4C -︒,那么高度是2400米高的山上的气温是____________________.24.a ※b 是新规定的这样一种运算法则:a ※b =a ﹣b+2ab ,若(﹣2)※3=_____.三、压轴题25.已知长方形纸片ABCD ,点E 在边AB 上,点F 、G 在边CD 上,连接EF 、EG .将∠BEG 对折,点B 落在直线EG 上的点B ′处,得折痕EM ;将∠AEF 对折,点A 落在直线EF 上的点A ′处,得折痕EN .(1)如图1,若点F 与点G 重合,求∠MEN 的度数;(2)如图2,若点G 在点F 的右侧,且∠FEG =30°,求∠MEN 的度数; (3)若∠MEN =α,请直接用含α的式子表示∠FEG 的大小. 26.问题:将边长为的正三角形的三条边分别等分,连接各边对应的等分点,则该三角形中边长为1的正三角形和边长为2的正三角形分别有多少个?探究:要研究上面的问题,我们不妨先从最简单的情形入手,进而找到一般性规律.探究一:将边长为2的正三角形的三条边分别二等分,连接各边中点,则该三角形中边长为1的正三角形和边长为2的正三角形分别有多少个?如图①,连接边长为2的正三角形三条边的中点,从上往下看:边长为1的正三角形,第一层有1个,第二层有3个,共有个;边长为2的正三角形一共有1个.探究二:将边长为3的正三角形的三条边分别三等分,连接各边对应的等分点,则该三角形中边长为1的正三角形和边长为2的正三角形分别有多少个?如图②,连接边长为3的正三角形三条边的对应三等分点,从上往下看:边长为1的正三角形,第一层有1个,第二层有3个,第三层有5个,共有个;边长为2的正三角形共有个.探究三:将边长为4的正三角形的三条边分别四等分(图③),连接各边对应的等分点,则该三角形中边长为1的正三角形和边长为2的正三角形分别有多少个?(仿照上述方法,写出探究过程)结论:将边长为的正三角形的三条边分别等分,连接各边对应的等分点,则该三角形中边长为1的正三角形和边长为2的正三角形分别有多少个?(仿照上述方法,写出探究过程)应用:将一个边长为25的正三角形的三条边分别25等分,连接各边对应的等分点,则该三角形中边长为1的正三角形有______个和边长为2的正三角形有______个.27.某商场在黄金周促销期间规定:商场内所有商品按标价的50%打折出售;同时,当顾客在该商场消费打折后的金额满一定数额,还可按如下方案抵扣相应金额:说明:[)a,b 表示在范围a b ~中,可以取到a ,不能取到b .根据上述促销方法,顾客在该商场购物可以获得双重优惠:打折优惠与抵扣优惠. 例如:购买标价为900元的商品,则打折后消费金额为450元,获得的抵扣金额为30元,总优惠额为:()900150%30480⨯-+=元,实际付款420元.(购买商品得到的优惠率100%)=⨯购买商品获得的总优惠额商品的标价,请问:()1购买一件标价为500元的商品,顾客的实际付款是多少元? ()2购买一件商品,实际付款375元,那么它的标价为多少元?()3请直接写出,当顾客购买标价为______元的商品,可以得到最高优惠率为______.28.已知线段30AB cm =(1)如图1,点P 沿线段AB 自点A 向点B 以2/cm s 的速度运动,同时点Q 沿线段点B 向点A 以3/cm s 的速度运动,几秒钟后,P Q 、两点相遇? (2)如图1,几秒后,点P Q 、两点相距10cm ?(3)如图2,4AO cm =,2PO cm =,当点P 在AB 的上方,且060=∠POB 时,点P 绕着点O 以30度/秒的速度在圆周上逆时针旋转一周停止,同时点Q 沿直线BA 自B 点向A 点运动,假若点P Q 、两点能相遇,求点Q 的运动速度.29.如图,已知数轴上点A 表示的数为6,B 是数轴上在A 左侧的一点,且A ,B 两点间的距离为10.动点P 从点A 出发,以每秒5个单位长度的速度沿数轴向左匀速运动,动点Q 从点B 出发,以每秒3个单位长度的速度沿数轴向左匀速运动.(1)设运动时间为t (t >0)秒,数轴上点B 表示的数是 ,点P 表示的数是 (用含t 的代数式表示);(2)若点P 、Q 同时出发,求:①当点P 运动多少秒时,点P 与点Q 相遇?②当点P 运动多少秒时,点P 与点Q 间的距离为8个单位长度?30.已知∠AOB 和∠AOC 是同一个平面内的两个角,OD 是∠BOC 的平分线. (1)若∠AOB=50°,∠AOC=70°,如图(1),图(2),求∠AOD 的度数;(2)若∠AOB=m 度,∠AOC=n 度,其中090090180m n m n <<,<<,<+且m n <,求∠AOD 的度数(结果用含m n 、的代数式表示),请画出图形,直接写出答案.31.如图,以长方形OBCD 的顶点O 为坐标原点建立平面直角坐标系,B 点坐标为(0,a ),C 点坐标为(c ,b ),且a 、b 、C 满足6a ++|2b+12|+(c ﹣4)2=0.(1)求B 、C 两点的坐标;(2)动点P 从点O 出发,沿O→B→C 的路线以每秒2个单位长度的速度匀速运动,设点P 的运动时间为t 秒,DC 上有一点M (4,﹣3),用含t 的式子表示三角形OPM 的面积; (3)当t 为何值时,三角形OPM 的面积是长方形OBCD 面积的13?直接写出此时点P 的坐标.32.已知:A 、O 、B 三点在同一条直线上,过O 点作射线OC ,使∠AOC :∠BOC =1:2,将一直角三角板的直角顶点放在点O 处,一边OM 在射线OB 上,另一边ON 在直线AB 的下方.(1)将图1中的三角板绕点O 按逆时针方向旋转至图2的位置,使得ON 落在射线OB 上,此时三角板旋转的角度为 度;(2)继续将图2中的三角板绕点O按逆时针方向旋转至图3的位置,使得ON在∠AOC的内部.试探究∠AOM与∠NOC之间满足什么等量关系,并说明理由;(3)将图1中的三角板绕点O按5°每秒的速度沿逆时针方向旋转一周的过程中,当直角三角板的直角边OM所在直线恰好平分∠BOC时,时间t的值为(直接写结果).【参考答案】***试卷处理标记,请不要删除一、选择题1.B解析:B【解析】【分析】根据倒数的定义求解.【详解】-2的倒数是-1 2故选B【点睛】本题难度较低,主要考查学生对倒数相反数等知识点的掌握2.A解析:A【解析】【分析】只含有一个未知数(元),并且未知数的指数是1次的整式方程叫做一元一次方程,它的一般形式是ax+b=0(a,b是常数且a≠0).据此可得出正确答案.【详解】解:A、213x=5x符合一元一次方程的定义;B、x2+1=3x未知数x的最高次数为2,不是一元一次方程;C、32y=y+2中等号左边不是整式,不是一元一次方程;D、2x﹣3y=1含有2个未知数,不是一元一次方程;故选:A.【点睛】解题的关键是根据一元一次方程的定义,未知数x的次数是1这个条件.此类题目可严格按照定义解题.3.B解析:B【解析】【分析】观察图形,正确数出个数,再进一步得出规律即可.【详解】摆成第一个“H”字需要2×3+1=7个棋子,第二个“H”字需要棋子2×5+2=12个;第三个“H”字需要2×7+3=17个棋子;第n个图中,有2×(2n+1)+n=5n+2(个).∴摆成第 20 个“H”字需要棋子的个数=5×20+2=102个.故B.【点睛】通过观察,分析、归纳并发现其中的规律,并应用发现的规律解决问题是应该具备的基本能力.本题的关键规律为各个图形中两竖行棋子的个数均为2n+1,横行棋子的个数为n.4.D解析:D【解析】【分析】根据题意画出图形,再分别计算即可.【详解】根据题意画图如下;(1)∵OC⊥OD,∴∠COD=90°,∵∠AOC=40°,∴∠BOD=180°﹣90°﹣40°=50°,(2)∵OC ⊥OD , ∴∠COD=90°, ∵∠AOC=40°, ∴∠AOD=50°,∴∠BOD=180°﹣50°=130°, 故选D . 【点睛】此题考查了角的计算,关键是根据题意画出图形,要注意分两种情况画图.5.B解析:B 【解析】 【分析】将1x =-代入2ax x -=,即可求a 的值. 【详解】解:将1x =-代入2ax x -=, 可得21a --=-, 解得1a =-, 故选:B . 【点睛】本题考查一元一次方程的解;熟练掌握一元一次方程的解与方程的关系是解题的关键.6.A解析:A 【解析】 【分析】根据平面直角坐标系中点的坐标特征判断即可. 【详解】 ∵5>0,3>0,∴点()5,3M 在第一象限. 故选A. 【点睛】本题考查了平面直角坐标系中点的坐标特征.第一象限内点的坐标特征为(+,+),第二象限内点的坐标特征为(-,+),第三象限内点的坐标特征为(-,-),第四象限内点的坐标特征为(+,-),x 轴上的点纵坐标为0,y 轴上的点横坐标为0.7.D解析:D 【解析】 【分析】观察数据,找到规律:第n 个数为(﹣2)n +1,根据规律求出第10个数即可.【详解】解:观察数据,找到规律:第n个数为(﹣2)n+1,第10个数是(﹣2)10+1=1024+1=1025故选:D.【点睛】此题主要考查了数字变化规律,根据已知数据得出数字的变与不变是解题关键.8.D解析:D【解析】【分析】从正面看到的图叫做主视图,从左面看到的图叫做左视图.根据图中正方体摆放的位置判定则可.【详解】解:从正面看,左边1列,中间2列,右边1列;从左边看,只有竖直2列,故选D.【点睛】本题考查简单组合体的三视图.本题考查了空间想象能力及几何体的主视图与左视图.9.C解析:C【解析】【分析】首先根据题意,明确“正”和“负”所表示的意义,再根据题意作答即可.【详解】+,解∵水位升高0.6m时水位变化记作0.6m-,∴水位下降0.8m时水位变化记作0.8m故选:C.【点睛】本题考查正数和负数,解题关键是理解“正”和“负”的相对性,明确什么是一对具有相反意义的量.在一对具有相反意义的量中,先规定其中一个为正,则另一个就用负表示.10.B解析:B【解析】【分析】由CB=4cm,DB=7cm求得CD=3cm,再根据D是AC的中点即可求得AC的长【详解】∵C,D是线段AB上两点,CB=4cm,DB=7cm,∴CD=DB﹣BC=7﹣4=3(cm),∵D是AC的中点,∴AC=2CD=2×3=6(cm).故选:B.【点睛】此题考察线段的运算,根据图形确定线段之间的数量关系即可正确解答.11.C解析:C【解析】试题解析:A.不是同类项,不能合并.故错误.B. 不是同类项,不能合并.故错误.C.正确.D.222 532.y y y -=故错误.故选C.点睛:所含字母相同并且相同字母的指数也相同的项叫做同类项.12.B解析:B【解析】【分析】从图形可知空白部分的面积为S 2是中间边长为(a ﹣b )的正方形面积与上下两个直角边为(a +b )和b 的直角三角形的面积,再与左右两个直角边为a 和b 的直角三角形面积的总和,阴影部分的面积为S 1是大正方形面积与空白部分面积之差,再由S 2=2S 1,便可得解.【详解】由图形可知,S 2=(a-b )2+b (a+b )+ab=a 2+2b 2,S 1=(a+b )2-S 2=2ab-b 2,∵S 2=2S 1,∴a 2+2b 2=2(2ab ﹣b 2),∴a 2﹣4ab +4b 2=0,即(a ﹣2b )2=0,∴a =2b ,故选B .【点睛】本题主要考查了求阴影部分面积和因式分解,关键是正确列出阴影部分与空白部分的面积和正确进行因式分解.二、填空题13.﹣1或﹣5【解析】【分析】利用绝对值和乘方的知识确定x 、y 的值,然后计算即可解答.【详解】解:∵|x|=3,y2=4,∴x=±3,y=±2,∵x<y,∴x=﹣3,y=±2,当x=﹣解析:﹣1或﹣5【解析】【分析】利用绝对值和乘方的知识确定x、y的值,然后计算即可解答.【详解】解:∵|x|=3,y2=4,∴x=±3,y=±2,∵x<y,∴x=﹣3,y=±2,当x=﹣3,y=2时,x+y=﹣1,当x=﹣3,y=﹣2时,x+y=﹣5,所以,x+y的值是﹣1或﹣5.故答案为:﹣1或﹣5.【点睛】本题主要考查了有理数的乘方、绝对值的性质有理数的加法等知识,,解题的关键是确定x、y的值.14.【解析】【分析】设小长方形卡片的长为2m,则宽为m,观察图2可得出关于m的一元一次方程,解之即可求出m的值,设盒子底部长方形的另一边长为x,根据长方形的周长公式结合图2与图3阴影部分周长之比为解析:【解析】【分析】设小长方形卡片的长为2m,则宽为m,观察图2可得出关于m的一元一次方程,解之即可求出m的值,设盒子底部长方形的另一边长为x,根据长方形的周长公式结合图2与图3阴影部分周长之比为5:6,即可得出关于x的一元一次方程,解之即可得出x的值,再利用长方形的面积公式即可求出盒子底部长方形的面积.【详解】解:设小长方形卡片的长为2m,则宽为m,依题意,得:2m+2m=4,解得:m=1,∴2m=2.再设盒子底部长方形的另一边长为x,依题意,得:2(4+x ﹣2):2×2(2+x ﹣2)=5:6,整理,得:10x =12+6x ,解得:x =3,∴盒子底部长方形的面积=4×3=12.故答案为:12.【点睛】本题考查了一元一次方程的应用,找准等量关系,正确列出一元一次方程是解题的关键.15.【解析】【分析】分别对其进行6次方,比较最后的大小进而得出答案.【详解】解:,5,都大于0,则,,故答案为:.【点睛】本题考查的是根式的比较大小,解题关键是把带根式的数化为常数进5<<【解析】【分析】分别对其进行6次方,比较最后的大小进而得出答案.【详解】解:50,则62636555=<=<,5<<,5<<.【点睛】本题考查的是根式的比较大小,解题关键是把带根式的数化为常数进行比较即可. 16.【解析】【分析】进行度、分、秒的转化运算,注意以60为进制,即1°=60′,1′=60″.【详解】解:36.35°=36°+0.35×60′=36°21′.故答案为:36°21′.【点解析:3621'o【解析】【分析】进行度、分、秒的转化运算,注意以60为进制,即1°=60′,1′=60″.【详解】解:36.35°=36°+0.35×60′=36°21′.故答案为:36°21′.【点睛】本题主要考查了度分秒的换算,相对比较简单,注意以60为进制,熟记1°=60′,1′=60″.17.【解析】【分析】用单价乘数量得出买2千克苹果和3千克香蕉的总价,再进一步相加即可.【详解】买单价为a 元的苹果2千克用去2a 元,买单价为b 元的香蕉3千克用去3b 元,共用去:(2a+3b)元解析:(23)a b【解析】【分析】用单价乘数量得出买2千克苹果和3千克香蕉的总价,再进一步相加即可.【详解】买单价为a 元的苹果2千克用去2a 元,买单价为b 元的香蕉3千克用去3b 元, 共用去:(2a +3b )元.故选C.【点睛】此题主要考查了列代数式,解决问题的关键是读懂题意,找到所求的量的等量关系. 18.810【解析】【分析】根据有理数的加减运算法则,对题干支出与收入进行加减运算即可.【详解】解:由题意五笔交易后余额为860+200-4-64-82-100=810元,故填810.【点睛解析:810【解析】【分析】根据有理数的加减运算法则,对题干支出与收入进行加减运算即可.【详解】解:由题意五笔交易后余额为860+200-4-64-82-100=810元,故填810.【点睛】本题考查有理数的加减运算,理解题意根据题意对支出与收入进行加减运算从而求解. 19.2; 0或3或6【解析】【分析】先计算出前6次输出结果,据此得出循环规律,从而得出答案;根据数值转换机的运算程序,求出所有x的值,使得输入的数和第2次输出的数相等即可.【详解】解析:2; 0或3或6【解析】【分析】先计算出前6次输出结果,据此得出循环规律,从而得出答案;根据数值转换机的运算程序,求出所有x的值,使得输入的数和第2次输出的数相等即可.【详解】解:∵第1次输出的结果为7+3=10,第2次输出的结果为12×10=5,第3次输出结果为5+3=8,第4次输出结果为12×8=4,第5次输出结果为12×4=2,第6次输出结果为12×2=1,第7次输出结果为1+3=4,第8次输出结果为12×4=2,……∴输出结果除去前3个数后,每3个数为一个周期循环,∵(2018﹣3)÷3=671…2,∴第2018次输出的数是2,如图,若x=14x,则x=0;若x=12x+3,则x=6;若x=12(x+3),则x=3;故答案为:2、0或3或6.【点睛】此题主要考查了代数式求值问题,要熟练掌握,求代数式的值可以直接代入、计算.如果给出的代数式可以化简,要先化简再求值.题型简单总结以下三种:①已知条件不化简,所给代数式化简;②已知条件化简,所给代数式不化简;③已知条件和所给代数式都要化简.20.【解析】【分析】利用补角的意义:两角之和等于180°,那么这两个角互为补角其中一个角叫做另一个角的补角直接列式计算即可.【详解】解:.故答案为.【点睛】此题考查补角的意义,以及度分秒解析:2930'【解析】【分析】利用补角的意义:两角之和等于180°,那么这两个角互为补角其中一个角叫做另一个角的补角直接列式计算即可.【详解】解:18015030'2930'-=.故答案为2930'.【点睛】此题考查补角的意义,以及度分秒之间的计算,注意借1当60.21.【解析】【分析】设应派往甲处x 人,则派往乙处人,根据甲处参加社会实践的人数是乙处参加社会实践人数的2倍,即可得出关于x 的一元一次方程,此题得解.【详解】解:设应派往甲处x 人,则派往乙处人,解析:()27x 21920x ⎡⎤+=+-⎣⎦【解析】【分析】设应派往甲处x 人,则派往乙处()20x -人,根据甲处参加社会实践的人数是乙处参加社会实践人数的2倍,即可得出关于x 的一元一次方程,此题得解.【详解】解:设应派往甲处x 人,则派往乙处()20x -人,根据题意得:()27x 21920x ⎡⎤+=+-⎣⎦.故答案为()27x 21920x ⎡⎤+=+-⎣⎦.【点睛】本题考查由实际问题抽象出一元一次方程,找准等量关系,正确列出一元一次方程是解题的关键.22.72【解析】【分析】用360度乘以C 等级的百分比即可得.【详解】观察可知C 等级所占的百分比为20%,所以C 等级所在扇形的圆心角为:360°×20%=72°,故答案为:72.【点睛】解析:72【解析】【分析】用360度乘以C 等级的百分比即可得.【详解】观察可知C 等级所占的百分比为20%,所以C 等级所在扇形的圆心角为:360°×20%=72°,故答案为:72.【点睛】本题考查了扇形统计图,熟知扇形统计图中扇形圆心角度数的求解方法是解题的关键. 23.【解析】【分析】从地面到高山上高度升高了2400米,用升高的高度除以100再乘以0.6得出下降的温度,再用地面的气温减去此值即可.【详解】解:由题意可得,高度是2400米高的山上的气温是-︒解析:18.4C【解析】【分析】从地面到高山上高度升高了2400米,用升高的高度除以100再乘以0.6得出下降的温度,再用地面的气温减去此值即可.【详解】解:由题意可得,高度是2400米高的山上的气温是:-4-2400÷100×0.6=-4-14.4=-18.4℃,故答案为:-18.4℃.【点睛】本题考查有理数的混合运算,解答本题的关键是根据题意列出正确的算式.24.-17【解析】【分析】根据题中的新定义将所求式子化为算式-2-3+2×(-2)×3,计算即可得到结果.【详解】∵a※b=a﹣b+2ab,∴(﹣2)※3=﹣2﹣3+2×(﹣2)×3=﹣解析:-17【解析】【分析】根据题中的新定义将所求式子化为算式-2-3+2×(-2)×3,计算即可得到结果.【详解】∵a※b=a﹣b+2ab,∴(﹣2)※3=﹣2﹣3+2×(﹣2)×3=﹣2﹣3﹣12=﹣17.故答案为:﹣17.【点睛】此题考查了有理数的混合运算,属于新定义题型,弄清题中的新定义是解本题的关键.三、压轴题25.(1)∠MEN=90°;(2)∠MEN=105°;(3)∠FEG=2α﹣180°,∠FEG=180°﹣2α.【解析】【分析】(1)根据角平分线的定义,平角的定义,角的和差定义计算即可.(2)根据∠MEN=∠NEF+∠FEG+∠MEG,求出∠NEF+∠MEG即可解决问题.(3)分两种情形分别讨论求解.【详解】(1)∵EN平分∠AEF,EM平分∠BEF∴∠NEF=12∠AEF,∠MEF=12∠BEF∴∠MEN=∠NEF+∠MEF=12∠AEF+12∠BEF=12(∠AEF+∠BEF)=12∠AEB∵∠AEB=180°∴∠MEN=12×180°=90°(2)∵EN平分∠AEF,EM平分∠BEG∴∠NEF=12∠AEF,∠MEG=12∠BEG∴∠NEF+∠MEG=12∠AEF+12∠BEG=12(∠AEF+∠BEG)=12(∠AEB﹣∠FEG)∵∠AEB=180°,∠FEG=30°∴∠NEF+∠MEG=12(180°﹣30°)=75°∴∠MEN=∠NEF+∠FEG+∠MEG=75°+30°=105°(3)若点G在点F的右侧,∠FEG=2α﹣180°,若点G在点F的左侧侧,∠FEG=180°﹣2α.【点睛】考查了角的计算,翻折变换,角平分线的定义,角的和差定义等知识,解题的关键是学会用分类讨论的思想思考问题.26.探究三:16,6;结论:n²,;应用:625,300.【解析】【分析】探究三:模仿探究一、二即可解决问题;结论:由探究一、二、三可得:将边长为的正三角形的三条边分别等分,连接各边对应的等分点,边长为1的正三角形共有个;边长为2的正三角形共有个;应用:根据结论即可解决问题.【详解】解:探究三:如图3,连接边长为4的正三角形三条边的对应四等分点,从上往下看:边长为1的正三角形,第一层有1个,第二层有3个,第三层有5个,第四层有7个,共有个;边长为2的正三角形有个.结论:连接边长为的正三角形三条边的对应等分点,从上往下看:边长为1的正三角形,第一层有1个,第二层有3个,第三层有5个,第四层有7个,……,第层有个,共有个;边长为2的正三角形,共有个.应用:边长为1的正三角形有=625(个),边长为2的正三角形有(个).故答案为探究三:16,6;结论:n², ;应用:625,300.【点睛】本题考查规律型问题,解题的关键是理解题意,学会模仿例题解决问题.27.(1)230元;(2) 790元或者810元;(3) 400,55%.【解析】【分析】()1可对照表格计算,500元的商品打折后为250元,再享受20元抵扣金额,即可得出实际付款;()2实际付款375元时,应考虑到20037520400≤+<与40037530600≤+<这两种情况的存在,所以分这两种情况讨论;()3根据优惠率的定义表示出四个范围的数据,进行比较即可得结果.【详解】解:()1由题意可得:顾客的实际付款()500500150%20230⎡⎤=-⨯-+=⎣⎦故购买一件标价为500元的商品,顾客的实际付款是230元.()2设商品标价为x 元.20037520400≤+<与40037530600≤+<两种情况都成立,于是分类讨论①抵扣金额为20元时,1x 203752-=,则x 790= ②抵扣金额为30元时,1x 303752-=,则x 810= 故当实际付款375元,那么它的标价为790元或者810元.()3设商品标价为x 元,抵扣金额为b 元,则 优惠率1x b 1b 2100%x 2x+=⨯=+ 为了得到最高优惠率,则在每一范围内x 均取最小值,可以得到2030405040080012001600>>> ∴当商品标价为400元时,享受到最高的优惠率1155%220=+= 故答案为400,55%【点睛】本题考查的是日常生活中的打折销售问题,运用一元一次方程解决问题时要抓住未知量,明确等量关系列出方程是关键.28.(1)6秒钟;(2)4秒钟或8秒钟;(3)点Q 的速度为7/cm s 或2.4/cm s .【解析】【分析】(1)设经过ts 后,点P Q 、相遇,根据题意可得方程2330t t +=,解方程即可求得t 值;(2)设经过xs ,P Q 、两点相距10cm ,分相遇前相距10cm 和相遇后相距10cm 两种情况求解即可;(3)由题意可知点P Q 、只能在直线AB 上相遇,由此求得点Q 的速度即可.【详解】解:(1)设经过ts 后,点P Q 、相遇.依题意,有2330t t +=,解得:6t =.答:经过6秒钟后,点P Q 、相遇;(2)设经过xs ,P Q 、两点相距10cm ,由题意得 231030x x ++=或231030x x +-=,解得:4x =或8x =.答:经过4秒钟或8秒钟后,P Q 、两点相距10cm ;(3)点P Q 、只能在直线AB 上相遇,则点P 旋转到直线AB 上的时间为:()120430s =或()1201801030s +=, 设点Q 的速度为/ycm s ,则有4302y =-, 解得:7y =;或10306y =-,解得 2.4y =,答:点Q 的速度为7/cm s 或2.4/cm s .【点睛】本题考查了一元一次方程的综合应用解决第(2)(3)问都要分两种情况进行讨论,注意不要漏解.29.(1)﹣4,6﹣5t ;(2)①当点P 运动5秒时,点P 与点Q 相遇;②当点P 运动1或9秒时,点P 与点Q 间的距离为8个单位长度.【解析】【分析】(1)根据题意可先标出点A ,然后根据B 在A 的左侧和它们之间的距离确定点B ,由点P 从点A 出发向左以每秒5个单位长度匀速运动,表示出点P 即可;(2)①由于点P 和Q 都是向左运动,故当P 追上Q 时相遇,根据P 比Q 多走了10个单位长度列出等式,根据等式求出t 的值即可得出答案;②要分两种情况计算:第一种是点P 追上点Q 之前,第二种是点P 追上点Q 之后.【详解】解:(1)∵数轴上点A 表示的数为6,∴OA =6,则OB =AB ﹣OA =4,点B 在原点左边,∴数轴上点B 所表示的数为﹣4;点P 运动t 秒的长度为5t ,∵动点P 从点A 出发,以每秒5个单位长度的速度沿数轴向左匀速运动,∴P 所表示的数为:6﹣5t ,故答案为﹣4,6﹣5t ;(2)①点P 运动t 秒时追上点Q ,根据题意得5t =10+3t ,解得t =5,答:当点P 运动5秒时,点P 与点Q 相遇;②设当点P 运动a 秒时,点P 与点Q 间的距离为8个单位长度,当P 不超过Q ,则10+3a ﹣5a =8,解得a =1;当P 超过Q ,则10+3a+8=5a ,解得a =9;答:当点P 运动1或9秒时,点P 与点Q 间的距离为8个单位长度.【点睛】在数轴上找出点的位置并标出,结合数轴求追赶和相遇问题是本题的考点,正确运用数形结合解决问题是解题的关键,注意不要漏解.30.(1)图1中∠AOD=60°;图2中∠AOD=10°;(2)图1中∠AOD=n m 2+;图2中∠AOD=n m 2-. 【解析】【分析】(1)图1中∠BOC=∠AOC ﹣∠AOB=20°,则∠BOD=10°,根据∠AOD=∠AOB+∠BOD 即得解;图2中∠BOC=∠AOC+∠AOB=120°,则∠BOD=60°,根据∠AOD=∠BOD ﹣∠AOB 即可得解;(2)图1中∠BOC=∠AOC ﹣∠AOB=n ﹣m ,则∠BOD=n m 2﹣,故∠AOD=∠AOB+∠BOD=n m 2+;图2中∠BOC=∠AOC+∠AOB=m+n ,则∠BOD=n m 2+,故∠AOD=∠BOD ﹣∠AOB=n m 2-. 【详解】解:(1)图1中∠BOC=∠AOC ﹣∠AOB=70°﹣50°=20°,∵OD 是∠BOC 的平分线,∴∠BOD=12∠BOC=10°, ∴∠AOD=∠AOB+∠BOD=50°+10°=60°;图2中∠BOC=∠AOC+∠AOB=120°,∵OD 是∠BOC 的平分线,∴∠BOD=12∠BOC=60°, ∴∠AOD=∠BOD ﹣∠AOB=60°﹣50°=10°;(2)根据题意可知∠AOB=m 度,∠AOC=n 度,其中090090180m n m n <<,<<,<+且m n <,如图1中,∠BOC=∠AOC ﹣∠AOB=n ﹣m ,。
2018年南京玄武外国语学校初一上学期期末数学试卷(附答案)

25. 根据同底数幂的乘法可知 (a + b)3 = (a + b) (a + b)2,利用完全平方公式及多项式的乘法法则,可以推导得 出公式 (a + b)3 = a3 + 3a2b + 3ab2 + b3. (1) 试写出 (a + b)3 = a3 + 3a2b + 3ab2 + b3 的推导过程;
②过点 C 和一格点 N 画直线 CN ⊥ AB,交 AB 于点 D(在图中标出格点 N ,并
画出直线 CN ).
(2) 在(1)的基础上回答下列问题:
①图中哪条线段的长度表示点 B 到直线 CD 的距离?答:
.
② ∠A 与 ∠BCD 的大小相等吗?为什么?
22. 如图,直线 AB,CD 相交于点 O,OE 平分 ∠BOD,OF ⊥ CD 于点 O.若 ∠EOF = 54◦, 求 ∠AOC 的度数.
∵ ∠AOC 与 ∠BOD 是对顶角, ∴ ∠AOC = ∠BOD = 72◦. 23. 法 1.设规定时间为 x 分钟,根据题意, 得:
1.5 (x − 10) = x + 5.
解这个方程,得:
x = 40 (分钟) .
1.5 (x − 10) = 1.5 × 30 = 45 (km).
答:规定时间为 40 分钟,快递员所行驶的总路程为 45 km.
.
14. 进价 2000 元的某品牌电视机,标价 2750 元,商场打折销售后仍可获利 10%,那么商场在销售时打了 折.
15. 让我们做一个数字游戏:
第一步:取一个自然数 n1 = 4,计算 a1 = n21 + 1; 第二步:算出 a1 的各位数字之和 n2,计算 a2 = n22 + 1; 第三步:算出 a2 的各位数字之和 n3,计算 a3 = n23 + 1;
2018南京市玄武区七年级英语上册期中试卷附答案

D. 废品
原文: Do you like my writing? It is easy to tell you all about my family. It is really“a piece of cake”. 50. Kyra thinks ______ is “a piece of cake”.
A. /dʒəˈɒgrəfi/
B. /dʒiˈəʊgrəfi/
C. /dʒiˈɒgrəfai/
D. /dʒiˈɒgrəfi/
完型填空
The bus ride ___32___ about 20 minutes.
A. spends
B. takes
C. costs
D. has
There is a very big river ___34___ their school and the village.
45. What does the underlined word “recycling” mean in Chinese?
A. 垃圾
B. 回收
2017-2018学年南京玄武区外国语学校初一上学期期中考试(Word有详细解析)

从A、B、C 和D 四个选项中,选出可以填入空白的最佳选项。
16. —Tom, it’s raining outside. Remember to take umbrella or raincoat w i th you—OK, mum.A. a; aB. a; anC. an; aD. an; m17. —My father and I w i ll go to the zoo to see some pandas. Would you like to go w i th ?—Ok, I’d love to.A. meB. himC. usD. them18. —your deskmate often late for school?—No, never.A. DoB. AreC. DoesD. Is19. —Jack, it is 11:00 p.m.. It is time to go to bed now.—OK, _, dad.A. good eveningB. good nightC. good morningD. good afternoon20. —Would you like to w a tch the flag-raising ceremony the morning of October 1st at Tian’anmen Square?—Good idea!A. ofB. atC. inD. on21. I live near my school. So I to school.A. by bikeB. on footC. w a lkD. w a lking22. —does your father go to school for the parents ’ meeting?—Tw i ce a year.A. How oftenB. How longC. How many timesD. How soon23. —Does your father like eating out?—. He enjoys meals at home every day.A. Yes, he doesB. No, he doesn’tC. Y es, he isD. No, he isn’t24. —Excuse me, w h at’s the time now ?—It’s 8:15.—Y ou mean “”? I should leave right now.A. a quarter to nineB. forty five to nineC. a quarter past eightD. a quarter past nine25. Nanjing Library from 9:00 a.m. to 5:30 p.m. from Tuesday to Sunday.A. is openB. openC. opensD. opening26. —Peter, come here and sit me.—OK. Let’s have a face-to face talk.A. in front ofB. betw e enC. in the front ofD. far aw a y from27. Which of the underlined part has a different sound?A. bigB. bikeC. himD. this28. —What do your parents usually do at w e ekends?—do some housew o rk and help me w i th my lessons.A. WeB. Y ouC. ID. They29. Which of the follow i ng sounds of the w o rd “geogra phy” is Right?A. /dʒəˈɒgrəfi/B. /dʒiˈəugrəf i/C. /dʒiˈɒgrəfai/D. /dʒiˈɒgrəfi/30. —Where is the school music room?—.A. Y ou’re w e lcomeB. This w a y, pleaseC. That’s all rightD. SureHow do you get to school?For many students, it is 31 to get to school. For example, I go to school by bus. The bus ride 32 about 20 minutes. The bus ride is never 33 because I alw a ys talk to my classmates.How ever, for the students in one small village in Ch ina, it is difficult. There is a very big river 34 their school and the village. There is 35 bridge and the river runs too quickly for boats , 36 these students go on a ropew a y to cross the river to school.One 11-year-old boy, Liangliang, crosses the river 37 school day, but he is not 38 . “I love to play w i th my classmates. And I love my teacher. He’s like a father to me.”Many of the students and villagers 39 leave the village. It is their dream to have a 40 .31. A. hard B. cool C. easy D. sad32. A. spends B. takes C. costs D. has33. A. interesting B. fun C. boring D. short34. A. from B. on C. with D. between35. A. a B. no C. only D. much36. A. so B. because C. but D. or37. A. one B. all C. both D. every38. A. lucky B. afraid C. cute D. happy39. A. never B. sometimes C. always D. often40. A. road B. bridge C. home D. school四、阅读理解(共15 小题;每小题1 分,满分15 分)ALeo, a 13-year-old boy, is a new student at Moonlight Midd l e School. He w a nts to join a club and spend his colorful school life w i th some new friends.t like outdoor activities, he can .A. take photos of the natureB. go boatingC. play football on sunny daysD. share his books w i th his friends42. If , you can join Science Club.A. you know litt l e about MathsB. you have free time on w e ekdaysC. you are more than 12 years oldD. you are interested in making new things43. Leo is free on Saturdays. He can be a member of .A. Read i ng ClubB. Science ClubC. Football ClubD. Photography ClubBFairfield School is called “the greenest school in Br itai n” because the pupils and teachers at the school think it’s w o rth looking after the environment! This is w h at they’ve been doing:Gro w ing vegetablesFairfield School pupils started their ow n vegetable garden. Both children and teachers plant and w ater the seeds (种子), then they pick the vegetables, w h ich are used in school meals. Now they can all en j oy healthy food at lunchtime.RecyclingThe Fairfield pupils do n’t just bring their books to school—they bring their rubbish too! There are recycling bins (箱)in the playground for cans, plastic bottles, batteries (电池)and paper. The teachers give a prize everymonth to the pupil w h o’s tried the hardest to recycle.Finding cleaner ways to get aroundEveryone w alks or rides a bike to Fairfield School! “W hen the roads are busy, it’s faster to ride bikes than to go by car anyw ay,” says one pupil. Even the teachers don’t use their cars. “We w on’t ask our pupils to look after the environment if w e don’t do it ourselves!” says one teacher.44. Why is Fairfield School called “the greenest school in Br i tain”?A. Because all the build i ngs in this school are green.B. Because there are a lot of green trees in their school.C. Because all the pupils and teachers there like the green colour.D. Because both pupils and teachers try their best to look after the environment.45. What does the underlined w o rd “recycli ng” mean in Ch i nese?A. 垃圾B.回收C. 奖品D. 废品46. What do they do w i th the vegetables they grow in school?A. They feed the animals w i th the vegetables.B. They sell the vegetables and make money.C. They put the vegetables in the recycling b i ns.D. They eat the vegetables that they grow in school.47. Which of the follow i ng is TRUE about Fairfield School?A. Only teachers can drive cars to school.B. There are some recycling bins in the classroom buildings.C. The pupil w h o has tried the hardest to grow vegetables can get a prize.D. The teachers set a good example for students to care for the environment.CI am Kyra. I think my father is a little fat but he says he is not. He is only “pear-shaped”. My mother has a very beautiful face. The skin on her face is soft. She has “skin like a peach”.I have a little sister. We all love her very much. My mother says that she is “the apple of her ey e”. My parents say I am lazy. I like to lie on the sofa and w a tch telev i sion. I also like to play computer games and eat snacks. My parents call me a “couch potato”. They tell me I should exercise more but I don’t like sport. It isn’t my “cup of t ea”.I have a dog. His name is Freddie. Freddie sleeps a lot. He lik e s to play w i th his ball. He gets very excit e d—he “goes bananas”!I have a cousin. She has red hair. We call her “carrot t op” because of her red hair. She is really kind. I think she is “a s sw e et as sugar”.Do you like my w r iting? It is easy to tell you all about my family. It is really “a piece of cake”.48. is the “a pple” of Kyra’s mother ’s eye.A. FreddieB. KyraC. Kyra’s cousinD. Kyra’s little sister49. When , Freddie “goes bananas”.A. he sleeps a lotB. he has nic e foodC. he plays w i th his ballD. he meets my family members50. Kyra thinks is “a piece of cak e”.A. play i ng computer gamesB. doing more exerciseC. telling others all about her familyD. w r iting interesting articles51. According to Kyra’s introduction of her family, w e know that .A. Kyra doesn’t like do i ng sportB. Kyra’s litt l e sister has “skin lik e a peac h”C. Kyra’s mother has red hair, so w e call her “carrot t op”D. All the members in Kyra’s family lik e eating d i fferent kinds of fruitD52. Hanukkah is the Jew i sh Festival of .A. fireB. lightsC. candlesD. nights53. People give to families and friends at Hanukkah.A. clothesB. presentsC. menorahsD. potatoes54. The w o rd “Spin” in “Spin the dreidel and see w h ich letter you get!” means .A. go very fastB. make a lot of noiseC. move in the w r ong w a yD. turn round and round quickly55. Which of the follow i ng statements is true?A. The Hanukkah pancake has 9 candles.B.Dreidel is the name of a different letter. C.The special pancakes are made w i th jam.D. “Hanukka h” and “Chanukah ” are the same.第II 卷非选择题(共45 分)五、填空(共15 小题;每小题1 分,满分15 分)A)根据括号中所给的汉语或要求写出英文单词或音标,使句子意思完整正确。
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江苏省南京市玄武外国语学校2017-2018年七年级上英语期末试题二、单项填空(共15小题;每小题1分,满分15分)从A、B、C和D四个选项中,选出可以填入空白处的最佳选项。
16. ---What ______ big fish it is!---Yeah! ______ Fish/fish is my favourite food.A. /; AB. the; TheC. /; TheD. a; /17. Marvel heroes like Spiderman and Ironman are usually ______ among young people.A. modernB. beautifulC. popularD. interesting18. ---An iPhone X ______ more than 10000 yuan.---That’s too much money. I think a Huawei phone works well, too.A. spendsB. costsC. takesD. buys19. ---Shall we go and buy some fruit?---Yes. I want to buy ______ oranges.A. a lotB. a littleC. a kiloD. a few20. Zhujiang Road is very busy. There are lots of shops on ______ sides of the street.A. allB. bothC. eachD. every21. Purple Mountain has so many trees that you can often hear birds sing ______ fine mornings.A. onB. inC. atD. for22. ---I want to buy some food. ______ Suguo Supermarket ______ now?---I think so. It opens at 8:30 every day.A. Is; openB. Do; closeC. Is; openingD. Is; close23. I can't do my homework now. The children ______ songs next door.A. singsB. are singingC. is singingD. sing24. ---Can you help me ______ when the train from Hangzhou gets to Nanjing?---Sure, Mr Green.A. go outB. look outC. find outD. look in25. ---______ does the man do the trick with cards?---I have no idea. Let’s watch carefully.A. WhoB. WhatC. WhichD. How26. ---I'd like to buy a pair of shoes. That pair of red shoes looks cool. Could I ______?---Sure. Please wait a minute.A. try on themB. try it onC. try on itD. try them on27. ---Which of the following words has the same sound as the "ay" in the word "say”?---Let me see. That's ______A. toyB. earC. rainD. coat28. ---How do you say 34,065 in English?---It’s ______.A. thirty-four thousand sixty-fiveB. thirty-four thousand and sixty-fiveC. thirty-four thousands and sixty-fiveD. thirty-four thousands sixty-five29. ---Look at the hair clips. Are they good presents for Mary?---______. But I’m not sure.A. OKB. SureC. MayD. Maybe30. ---______, young man?---Yes, I’d like to have a look at the jeans, please.A. What would you likeB. Could you help meC. May I help youD. What can you do for me三.完形填空(共10小题,每小题1分,请分10分)阅读短文,从短文后所给各题的四个选项(A、B、C、D)中,选出可以填入空白处的最佳选项。
This is an American computer-animated interesting film. Its name is The Secret Life of Pets. It tells a story ___31___ a dog named Max and his friends. Max is a lucky dog in the world. His ___32___ Katie finds him around a park. After that, he lives with ___33___ in an apartment (公寓).When Katie is at ___34___ during the day, Max plays with other pets in the building: Gidget, Chloe and Sweet Pea. Gidget is a white cute dog and she likes Max very much. Chloe is a fat cat and Sweet Pea is a little bird. One night, Katie ___35___ home another dog, Duke. He is not ___36___ to Max. He’s very dirty. He doesn’t know ___37___ to liv e with other pets and he always makes trouble. One day, Max and Duke go out to take a walk. ___38___, some animal control officers (管理员) see them and want to catch them. Then they ___39___ their dangerous but exciting trip. On their trip, the two dogs help ___40___ and now they’re good friends.31. A. with B. for C. about D. of32. A. teacher B. master C. friend D. aunt33. A. her B. she C. it D. you34. A. home B. school C. work D. hospital35. A. needs B. gets C. brings D. takes36. A. happy B. bad C. cool D. friendly37. A. where B. how C. why D. what38. A. Happily B. Lucky C. Sad D. Sadly39. A. start B. play C. draw D. keep40. A. others B. each other C. the other D. the others四、阅读理解(共15小题,每小题1分,满分15分)阅读下列材料,从每题所给的四个选项(A、B、C、D)中,选出最佳选项A41. When does Helen do the shopping?A. In the morningB. In the afternoonC. In the eveningD. In the late night42. What does the underlined word “item” mean?A. 单价B. 数量C. 产地D. 商品43. How much do the jeans cost Helen?A. ¥235.00B. ¥470.00C. ¥460.00D. ¥328.00BMy name is Rachel. I am a ten years old kid in Toronto. I’d like to tell you something about Canada. Canada is a country that covers most of the north half of North America. It is the second largest country in the world. Now, I want to tell you about how we live here in my country.Ottawa is the capital of Canada. It is a beautiful city with a river through it. There are ten provinces in Canada. Toronto is a city in the province of Ontario. Because we are such a big country, we have beautiful mountains, plains (草原), rivers, lakes and waterfalls (瀑布).At school we learn about native (本国的) Canadians, such as the Micmacs. We also need to learn French because Canada is not only English, but also a French-speaking country.Most of Canadians come from different countries in the world. But now living here, we are Canadians, we all love our beautiful country — Canada.44. Which of the following is true?A. Rachel is from America.B. Canada is a big country.C. Canada is in South America.D. Canada has nine provinces.45. The capital of Canada is ______.A. OttawaB. OntarioC. TorontoD. Montreal46. Micmacs is a kind of ______.A. bookB. sportC. languageD. music47. Canadians usually speakA. only EnglishB. only FrenchC. Chinese and EnglishD. English andFrenchCOh, the rain! How Sara hates the rain! She cannot go outside to meet her friends for a game. Her mother says to her, "You may catch a cold if you play in the rain." But Sara shouts, "It's raining, but it's very hot outside!" Her mother still doesn’t let her in the rain.Sara goes up to her room and lies down in front of her window. In fact she has many things to do in her room. There is a TV, some books and toys. But she doesn't like any of them.Sara sits by the window. She does everything to make the rain go away. She opens the window so the rain can hear her. She wishes the rain away but that doesn't work. She asks it to go away but that still doesn't work. She stands up and shouts at the rain but that sti ll doesn’t work."Well, if you’re going to be here and ruin my day, you can find something interesting for me to do." She shouts and again she gets no answer.So she sits back down on the window. It is still raining. “Fine," she thinks, "I can go swimming, ride my bike and play with my friends when the rain stops.” She thinks about her ideas again and again. How she wishes the sun come out! Soon she falls asleep on the window.48. What’s the weather like that day?A. Rainy and hotB. Rainy and coldC. Cold and sunnyD. Hot and sunny49. What does the underlined word "ruin” mean in Chinese?A. 喜欢B. 改变C. 毁掉D. 度过50. From the passage, we know ______.A. the rain stops and the sun comes outB. Sara finally falls asleep on the windowC. Sara is interested in playing in the rainD. Sara’s mother doesn’t want her to play with her friendsDThe US Department of Agriculture (农业部) made new rules for school lunches. New school meals must have more fruit and vegetables. The new school lunch rules are good for health. But does the new school lunch really change what kids eat? We ask some students about that. And these are their answer. There are more fruit and vegetables to choose. There were potato chips for lunch but now there are baby carrots. ---By Audrey Hill, FloridaI think the new school lunch can help me and other kids eat healthy food. I brought lunch to school on Tuesdays and Wednesdays before changing. But now I don't need to bring food to school, I can eat healthy, delicious food at school, too. ---By Linda Tong, New JerseyI am excited for the new school lunch around the country, I hardly (几乎不) bought lunch at school before changing. But now I often buy lunch at school because I think they are healthy now.---By Rachel Ayres, Washington51. What must the new school meals have according to the passage?A. Fruit and vegetables.B. Fish and meat.C. Carols and chicken.D. Dessert and eggs.52. When did Linda bring food to school before?A. On Mondays and Tuesdays.B. On Tuesdays and Wednesdays.C. On Tuesdays and Thursdays.D. On Thursdays and Wednesdays.53. What does Rachel Ayres think of the new school lunch?A. She doesn't like the new school lunch.B. She can't stand the new school lunch.C. She thinks the new school lunch is healthy.D. She thinks the new school lunch isdifferent.54. Which is true according to the passage?A. The new school lunch meals are healthy and delicious.B. There were baby carrots before changing.C. Linda brings food to school every day.D. Rachel doesn't like the new schoollunch.55. From the passage we know that ______.A. only a few kids like the new school lunch meals.B. most kids still eat more junk food atschool.C. most kids like the new school lunch meals.D. many kids eat at home for lunch.第二卷非选择题(共45分)五、填空(共15小题;每小题1分,满分15分)A) 根据括号中所给的汉语或音标写出单词,使句子意思完整正确。