文档库 最新最全的文档下载
当前位置:文档库 › 质数和合数_知识点整理(1)

质数和合数_知识点整理(1)

质数和合数_知识点整理(1)
质数和合数_知识点整理(1)

人教版五年级英语下册Unit1知识点汇总

Unit1 My day 知识整理 △话题:谈论每天的活动及时间安排 △词汇:do morning exercises(做早操) eat breakfast/lunch/dinner(吃早餐/午餐/晚餐) have...class(上…课),play sports(做运动) cleanmyroom(打扫我的房间),go forawalk (散步) go shopping(购物),takeadancingclass(上舞蹈课) △拓展词汇:get up(起床),go to bed(上床睡觉) washmy clothes(洗我的衣服), watch TV(看电视) do homework(做作业), play music(演奏音乐) cook dinner(煮晚餐), at home(在家) inthemorning(在上午),intheafternoon(在下午) intheevening(在晚上),atnight(在半夜) △句型: ①询问做某事在几点 When doyou+动词原形(短语)+其他? —— At +时间 —— I(+频度副词)+动词原形(短语)+at+时间。 例句:When do you get up in the morning? —— At 7:30. —— I often get up at 7:30. ②询问周末的活动安排

What do you often do on the weekend ? I often (always/sometime/usually) +…(周末的活动)+with … (某人)+ontheweekend (onSaturdays/on Sundays ). 例句:What do you do on the weekend ? I often take a dancing class with my friendon Sundays. △知识点: 1:注意介词的搭配 at +具体时间(几点)/night/home at 9 o ’clock in +国家/季节 in Spain on +星期 on the weekend/on Sundays with +人 with my father/mother/friend 2:表示时间频率词的区别 always 表示总是,一直; usually 表示经常,通常; often 表示经常,常常; sometimes 表示有时,间或。 按它们的频率大小排列如下: always (100%)→usually (80%)→often (60%)→sometimes (40%) 3:其他知识点 also 用于句中 1) 也 too too 用于肯定句中 用于句末

奥数质数合数问题解析

奥数质数合数问题解析 奥数质数合数问题解析 今有10个质数:17,23,31,41,53,67,79,83,101,103.如果将它们分成两组,每组五个数,并且每组的五个数之和相等,那么把含有101的这组数从小到大排列,第二个数应是(). 分析:可以先求出这10个质数的和是多少,根据已知条件,把这10个质数分成两组,即可求出每组5个质数的和,然后在分析每组数各有哪几种情况,由此解答即可. 解答:这10个质数之和是598,分成两组后,每组五个数之和是598÷2=299. (1)三个1和一个7; (2)二个3和二个7; (3)三个3和一个1. 31+41+101=173,220-173=47,可这十个数中没有47,情形(1)被否定. 17+67=84,220-84=136,个位数为3有23,53,83,只有 53+83=136,因此从情形(2)得到一种分组:17,53,67,79,83和23,31,41,101,103. 所以,含有101这组数中,从小到大排列第二个数是31. [注]从题目本身的要求来说,只要找出一种分组就可以了,但从情形(3)还可以得出另一种分组.23+53+83+103=262,262-220=42,我们能否从53,83,103中找出一个数,用比它少42的.数来代替呢? 53-42=11,83-42=41,103-42=61.这十个数中没有11和61,只有41.又得到另一种分组:

23,41,53,79,103和17,31,67,83,101. 由此可见,不论哪一种分组,含101这组数中,从小到大排列,第二个数都是31. 点评:此题的解答思路要开阔,考虑要周全,分析所包含的各种情况,提高分析解决问题的能力.

Unit1单元测试题1

Unit 1 单元测试题1 Written test part (共80分) Ⅳ. 单项选择(每小题1分,共10分) 从A、B、C、D四个选项中选择可以填入空白处的最佳答案。( ) 16. This is _______ ruler. _______ ruler is yellow. A. a; A B. the; A C. the; The D. a; The ( ) 17. —Hi, Alan! What’s _______ name? —Hi, Jim! He is Mike. A. your B. her C. his D. my ( ) 18. _______ is Mary. _______ cup is blue. A. She; She B. She; Her C. Her; Her D. Her; She ( ) 19. —_______ you Paul? —No, I _______ not. A. Are; am B. Is; am C. Are; is D. Is; is ( ) 20. I am Tom Green. Green is my _______ name. A. first B. middle C. last D. school ( ) 21. —Spell your name, please. —_______. A. He isn’t Bob B. B-O-B C. I’m Bob D. N-A-M-E ( ) 22. —What’s five and two? —_______. A. Six B. Seven C. Eight D. Nine

人教版_高中英语必修一unit1_知识点总结

人教版_高中英语必修一unit1_知识点总结 Survey n. 纵览,视察,测量v. 审视,视察,通盘考虑,调查 1. we stood on the top of the mountain and surveyed the countryside. 我们站在山顶上,眺望乡村? 2. a quick survey of the street showed that no one was about. 扫视街道, 空无一人? Add v. 增加 1. he added some wood to increase the fire. 他加了一些木柴,使火旺些? 2. if you add 4 to 5, you get 9. 四加五等于九? 3. add up all the money i owe you. 把我应付你的钱都加在一起? Upset a. 烦乱的,不高兴 v. 颠覆,推翻,扰乱,使心烦意乱,使不舒服 1. i'm always upset when i don't get any mail. 我接不到任何邮件时总是心烦意乱? 2. he has an upset stomach. 他胃不舒服? 3. the news quite upset him. 这消息使他心烦意乱? Ignore v. 不顾,不理,忽视 1. i said hello to her, but she ignored me completely! 我向她打招呼, 可她根本不理我! 2. i can't ignore his rudeness any longer. 他粗暴无礼, 我再也不能不闻不问了? Calm n. 平稳,风平浪静 a. 平静的,冷静的 v. 平静下来,镇静 1. it was a beautiful morning, calm and serene. 那是一个宁静?明媚的早晨? 2. you should keep calm even in face of danger. 即使面临危险,你也应当保持镇静? 3. have a brandy it'll help to calm you (down). 来点儿白兰地--能使你静下来? Calm down vt. 平静下来(镇定下来)

必修五unit1知识点总结

1.have 1)have sb/sth do sth “让某人/物做某事”,宾语sb/sth和宾补do之间为主动. 如:Mum often has me help do some housework. 2)have sb/sth doing sth “让某人/物一直/总是做某事”,宾语sb/sth和宾补do之间为主动,且强调动作一直进行. 如:Don't have the machine working all the time. 3)have sb/sth done “让某人/物被...”,宾语sb/sth和宾补do之间为被动关系. 如:I had my hair cut yesterday. 2.get 1)get sb/sth to do sth“使得某人/物去做某事”,宾语sb/sth和宾补do之间为主动关系,且动作尚未发生. 如:Can you get us to do the experiment? 你能让我们做这个试验吗? 2)get sb/sth doing sth “使得某人/物正在做某事”,宾语sb/sth和宾补do之间是主动关系,且动作正在发生. 如:He has got the car starting. 3)get sb/sth done “使得某人/物被...”,宾语sb/sth和宾补do之间是被动关系. 如:I must get my bike repaired. 3.make make sb/sth do sth “使得某人/物做某事”,宾语sb/sth和宾补do之间是主动关系. 如:His joke made us all laugh. Unit 1 Great scientists ? 1. (v.)检查( inspect, check) 2. (vt.& vi.) 推断出,结束 3. (vt.) 分析( n. analysis) 4. (vt.& n.) 打败;战胜,使受挫;失败(beat) 5. (vt.) 出席,护理,照顾,参加 6. (vt.) 暴露,揭露,使曝光(uncover,unmask, undress,reveal ) 7. (vt.& n.) 治愈,治疗;痊愈 8. (v.) 控制 9. (vt.) 吸收,吸引;使专心 10. (vt.& n) 责备,谴责;过失,责备(criticize, scold,accuse 反praise) 11. (adv.) 立即 12. (n.& v.) 把手;处理,操纵(deal with) 13. (vt.& vi.) 贡献,捐献,捐助 14. (v.) 完成(finish) 15. (vt.) 拒绝,抛弃,不接受(refuse/ abandon) 16 . (n.) 特征,特性 17. (adj.) 严重的(serious),严厉的,剧烈的

基础模块一Unit1单元测试试题整理

基础模块一Unit1单元测试 英语试卷(一) 班级_________ 姓名___________ 成绩________________ 一、单项选择(本题10小题,每小题1分,共10分) 从A.B.C.D四个选项中找出划线部分读音与其余三个不同的选项填如以下格内。 1. A. food B. cool C. book D. zoo 2. A. also B. talk C. walk D. call 3. A with B. thank C. three D. both 4. A. bread B. sea C. leave D. meat 5.A. cake B. nice C. come D. clean 6、 A. bed B. desk C. she D. let 7.A. why B. where C. what D. who 8. A. milk B. time C. fish D. in 9. A. mother B. come C. on D. color 10. A. watch B. school C. much D. China 二、选择单词的正确释义,把其正确的字母代号填入方框内。(本题10小题,每小题1分,共10分)

11. telephone A. to send some a message by computer 12. first B. system for sending or receiving sound 13. E-mail C. before anything else 14. vocational D. a person who manages a business 15. manager E. preparing one for a job 16. secretary F. a person who teachers in a school 17. doctor G. a person who keeps records and answers phones 18. teacher H. a person who works with building or other equipments 19. engineer I. a person who works in a hospital 20. cleaner J. a person who does the cleaning 三、选择填空:(本题20分,每小题1分,共20分) 21 . Mary has a bad cold. She has to stay in ____ bed. A. a B. / C. an D. the 22.Cindy has ___ e-dog and its name is Hobo. A. a B. an C. / D. the 23. A number of students good at math in our class. A. am B. is C. are D. he

Unit1知识点整理

Vocabulary 1.flame ◎n. The whole building was soon in flames. burst into flames ※literary a sudden strong feeling a flame of passion anger desire hope ◎v. literary to become suddenly bright with light or colour, especially red or orange: Erica’s cheeks fla med (with anger.) https://www.wendangku.net/doc/ae2445060.html,sh---lace ◎ something firmly to something else, or to tie two things together firmly using a rope After lashing the boat to the bank, we ran for shelter from the storm. ◎to hit/attack sth. with violent force The man lashed the horse to go faster. Giant waves /wind/rain/sea lashed the sea wall. ◎if an animal lashes its tail, or if its tail lashes, it moves its tail fast and violently from side to side, often when it is angry ◎to criticize someone angrily –used especially in newspapers: Democrats lashed Republican plans, calling them extreme. Gallins lashed back at those who accused him of corruption. ※Olson lashed out at the media.(critcize sb. suddenly) She would suddenly lash out at other children.( to suddenly try to hit sb) n. (作为惩罚的)鞭打,抽打: They each received 20 lashes for stealing. *eye?brow /?a?bra?/眉毛 lash/eyelash睫毛 3.scoff ◎If you scoff at something, you laugh at it in a way that shows you think it is ridiculous David scoffed at her fears. Officials scoffed at the idea. ‘You, a scientist!’ he scoffed. It’s easy to scoff when you haven’t tried it yourself. 4.sway ◎to move slowly from one side to another:

五上unit1知识点总结

知识要点总结 Unit 1 一.语音 字母组合bl ,pl ,cl, gl, fl , sl 在单词中的发音二,词组总结 1.talk about 谈论 2.look at 看 3.take sb to sp 带某人到某地 4.so many 如此多 5.make model planes 制做飞机模型 6.like to do 喜欢做某事 7.like doing 8.forget to do 忘记将要做的事 9.forget doing 忘记已做过的事 10.want to do 想要做某事 11.introduce …to 介绍 12.let`s help…让我们来帮助….. 13.stay with 和….呆在一起 14.in English class 在英语课上 15.play football 踢足球 16.every day 每天 17.Thank you to every one in the family 她经常对家里的每个人说谢谢你。 18.in the family 在家里 19.clean the car 清洁汽车 20.walk the dog 溜狗 21.play with 和…..玩 22.become good friends 成为好朋友 23.go to school 上学 24.new friends 新朋友25.birthday party 生日聚会 26.big hands 大手 27.long arms 长胳膊 28.answer the questions 回答问题 29.be good at 擅长 30.be famous for 以….而著名 31.play tricks on 和…开玩笑 https://www.wendangku.net/doc/ae2445060.html,e to 来到 33.Beijing duck 北京烤鸭 34.at first 起初 35.a lot 许多 36.at camp 露营 37.in a boat 在小船上 38.catch fish 捕鱼 39.put…on 把…放在…上 40.pick up 拾起 41.go to bed 上床睡觉 42.Good night 晚安 43.at school 在学校 44.how to 如何去 45.cook the fish 做鱼 46.play a trick 开玩笑 47.a toy snake 玩具蛇 48.it`s time for 是该做….的时候了 49.it`s time to do 三,重点句型 What s+某人(第三人称单数)+like? …..是什么样的人? 答语: He/She is+表示人体貌特征或性格特点的形容词。 =What does+某人(Tom, your mother…)+look like ….长得什么样? What does your little sister look like.你妹妹长什么样 四,掌握句型 1.Who are Bill`s new friends? 2.Who`s this ? 3.That`s Helen. 4.Let`s talk about our classmates. 5.She`s friendly, too. 6.What is Tom like? 7.Bill takes Yaoyao to Tom`s birthday party. 8.There are so many model planes.

《质数与合数》教案设计

质数与合数教学设计 教学内容:本内容是五年级上册。 【教材分析】 《质数与合数》它是在学生已经掌握了因数和倍数的意义,了解了2、5、3倍数的特征之后学习的又一重要内容,它是学生学习分解质因数,求最大公因数和最小公倍数的基础,在本章教学内容中起着承前启后的重要作用。 【教学背景分析】 五年级的学生已具备一定的观察、分析、理解能力,掌握了一些学习数学的方法。学生对学习充满热情和好奇心,有主动参与的意识,迫切地希望体验探究学习的过程。因此,我根据教学内容选择了探究性的学习方式。通过体验与探究的活动,让学生亲历概念的自我建构过程,培养学生勇于探索的科学精神。 【设计理念】 在《数学新课程标准》中,强调要从学生已有的生活经验出发,让学生亲身经历将实际问题抽象成数学模型并进行解释与运用的过程。因此教学中根据儿童的认知规律,创设情境,激发学生的学习兴趣和强烈的求知欲望,引导学生积极思维,主动获取知识,使学生在自主学习、探索、交流中要学数学,会学数学和乐学数学,力求体现“以学生发展为本”的指导思想。 【教学目标设计】 1、知识与技能:使学生理解并掌握质数、合数的概念,并能进行正确的判断。 2、过程与方法:采用探究式学习法,通过操作、观察自主学习-——提出猜想——合作、交流验证——分类、比较——抽象——归纳总结——巩固提高学习过程,培养学生动手操作、观察和概括能力,培养学生积极探究的意识。 3、情感态度与价值观:在体验与探究的活动中,让学生体验数学活动充满着探索与创新,感受数学文化的魅力,培养学生勇于探索的科学精神。 【教学重点】:理解质数和合数的意义【教学难点】:判断一个数是质数还是合数的方法,明确自然数按因数的个数可分为三类【教具学具准备】:学生每人准备一张学号牌、课件 【教学过程】: 一、课前谈话:快点告诉我你的学号,学号是每位同学在这个班级的数字代号,每个人对自己学号的数字都会有特殊的感情,是吗?谁愿意用学过的知识来介绍自己的学号是个怎样的数呢?…… 二、引入:刚才很多同学在介绍学号时很多用到了奇数和偶数的知识,请学号是奇数的同学站起来;哪些人学号是偶数呢?都站过了吗,可见自然数可以怎样分类?分类依据是什么? 三、探究新知:这节课我们换个角度,通过研究因数进一步来研究自然数,看看是否有新的发现。 1、写因数。每个同学都有自己的学号对不对,那么请你写出自己学号的所有因数,在写之前请一两个同学说说写因数的方法?说完后然后学生现在开始写因数,就写在学号牌上。(要求:写因数时要求完整、工整、有规律。) 2、交流:请1—12号同学汇报自己学号的所有因数,教师板书。现在请所有同学一起来

Unit 1 单元测试题 2

Unit 1 单元测试题2 Written test part (共95分) Ⅴ. 单项选择(每小题1分,共15分) 从A、B、C、D四个选项中选择可以填入空白处的最佳答案。 ( )21. I got Ann’s new address ______ asking her aunt so I could visit her last weekend. A. with B. by C. from D. at ( )22. ______ you want to know more about Apple Watch, please look through this website. A. If B. After C. Though D. Unless ( )23. —Susan, what’s your ______ to keeping active in class? —Going to bed early and getting up early. A. habit B. rule C. secret D. ability ( )24. —Dad, why can’t I still play this music well? —Well, dear, just be ______. It takes time. A. relaxed B. creative C. friendly D. patient ( )25. When Jack got into the classroom, he surprisingly ______ that nobody was there. A. discovered B. repeated C. memorized D. remembered ( )26. If you read a sentence and ______ each word that you don’t know in the dictionary, you’ll often misunderstand its meaning. A. pick up B. look up C. cut up D. mix up ( )27. —What do you think of Jim? —He hardly speaks. It’s difficult ______ what he’s thinking. A. know B. stop C. to know D. to stop ( )28. The movie Big Hero 6 is ______ interesting ______ I have watched it three times. A. enough; to B. such; that C. too; to D. so; that ( )29. Our teacher says that ______ we practice, ______ our spoken English will be. A. more; better B. the more; the better C. more; the better D. the more; better ( )30. Linda’s father is strict with her, so she i s afraid ______ him what has happened to her. A. of telling B. to telling C. of showing D. to showing ( )31. —Jack, how’s it going with your English? —Not good. I ______ follow my teacher in class. A. shouldn’t B. need n’t C. won’t D. can’t

牛津6AUnit1知识点整理

牛津6AUnit1知识点整理 AUnitone [词汇] alays总是question问题 as问ean意思是,意指 ust必须;应当should应当,应该 taeaal散步pic拾 public公共的,公众的sign标志;告示牌 consin堂兄弟;堂姐妹danger危险 aay开grass草;草地 eepoff让开;不接近shouldn't=shouldnot bird鸟cage笼子 quiet安静的,静静的aenoise发出的声音 soe吸烟litter乱丢杂物 par停放suddenly突然 soething某事;某物note钞票,纸币 looaround环顾,往四周看nearby附近 quicly快地picup拾起,捡起 eeper看守人eup上 point指fine罚款

词组[ inthepar在公园2.onlyfouryearsold只有四岁 alotof=lotsof许多4.publicsigns公共标志 assb.aboutsth.问某人有关某事6.differentthings不同的东西 ontheall在墙上8.goin进去 stayaayfrothebuilding远离建筑10.onthegrass在草地上 1.eepoffthegrass远离草地1 2.alonthegrass走在草地上 3.bequiet安静1 4.aenoise发出吵闹声 noalotaboutsth.对某事了解很多16.nosoing禁止吸烟 nolittering不准乱扔18.noparing禁止停车 Donottouch.不准触碰。20.noeatingordrining此处禁止吃喝 1.taeaal散步2 2.aten-yuannote一张十元的纸币 3.looaround环顾四周2 4.alto…朝……走过去 picup捡起,拾起26.apareeper一个公园管理员 eupto…朝……走过来28.pointto…指向…… saytosb.对某人说30.overthere那边,那里 fine¥10罚款10元32.givesb.sth.给某人某物 3.tryagain在试一次

奥数五年级质数合数问题

奥数五年级质数合数问题 奥数五年级质数合数问题 今有10个质数:17,23,31,41,53,67,79,83,101,103.如果将它们分成两组,每组五个数,并且每组的五个数之和相等, 那么把含有101的这组数从小到大排列,第二个数应是(). 分析:可以先求出这10个质数的和是多少,根据已知条件,把这10个质数分成两组,即可求出每组5个质数的和,然后在分析每组数各有哪几种情况,由此解答即可. 解答:这10个质数之和是598,分成两组后,每组五个数之和 是598÷2=299. (1)三个1和一个7; (2)二个3和二个7; (3)三个3和一个1. 31+41+101=173,220-173=47,可这十个数中没有47,情形(1) 被否定. 17+67=84,220-84=136,个位数为3有23,53,83,只有 53+83=136,因此从情形(2)得到一种分组:17,53,67,79,83和23,31,41,101,103. 所以,含有101这组数中,从小到大排列第二个数是31. [注]从题目本身的要求来说,只要找出一种分组就可以了,但从情形(3)还可以得出另一种分组.23+53+83+103=262,262-220=42, 我们能否从53,83,103中找出一个数,用比它少42的数来代替呢? 53-42=11,83-42=41,103-42=61.这十个数中没有11和61,只有41.又得到另一种分组: 23,41,53,79,103和17,31,67,83,101.

由此可见,不论哪一种分组,含101这组数中,从小到大排列,第二个数都是31. 点评:此题的解答思路要开阔,考虑要周全,分析所包含的各种情况,提高分析解决问题的能力.

人教版六年级下英语Unit1单元测试题及答案

六年级英语第八册第一单元测试 (考试时间:40分钟满分:100分) 一、听力部分(共四大题,计30分) I.听录音,选择每组中你所听到的字母组合。(6分) 1. ZNM CMN 2. CYU SIV 3. JLR GAI 4. ALF IOE 5. VHF VKQ 6. HTI HBR II.听录音,选择每组中你所听到的单词。(10分) ( ) 1 A. strong B. stronger C. longer ( ) 2. A. taller B. shorter C. smaller ( ) 3. A. hot B. short C. shorter ( ) 4. A. 156cm B. 165cm C. 155cm ( ) 5. A. happy B. healthy C. heavy III.听录音,选择正确的图片。(4分) 1. 2. A B A. B 3. 4. A B A B IV.听录音,选择与录音相符的答案。(10分) ( )1. A. Bai Ling is two years older than Amy. B. Amy is two years older than Bai Ling. ( )2. A. I’m heavier than Zhang Peng. B. I’m not heavier than Zhang Peng. ( )3. A. My bedroom is 15 square meters. B. My bedroom is 13 square meters.

( )4. A. Lucy’s sister is 5cm taller than Sarah’s sister. B. Lucy’s sister is 5cm shorter than Sarah’s sister. ( )5. A. My pencil is 1cm longer than yours. B. My pencil is 2cm longer than yours. 二、笔试部分(共八大题,计70分) I.字母填空。注意大小写形式。(共6小题,计6分) 1.c e 2. H J 3.x z 4. t v 5. j l 6. E G II. 根据图片,选择正确的单词。(共4小题,计4分) 1.A.tall B.long 2.A.strong B.short 3.A. thin B.long 4. A.biger B.bigger III选出与其它三项不属于同一类的单词。(共5小题,计10分)()1. A.dog B. fish C.apple D.bird ()2. A.short B.two C. eleven D. ten ()3. A.taller B.shorter C.stronger D.writer ()4. A.big B.heavy C.take D.long ()5. A. singer B.thinner C.worker D.doctor IV.选词填空。(共5小题,计10分) 1.It’s (cold/hot) today. You can wear your shorts. 2. (Wait/Stop) at a red light. 3.How ( tall/taller) is he?

七年级上册英语Unit1知识点归纳总结

七年级英语上册Unit1知识点归纳总结 Unit1 Topic1 Welcome to China! 1.三种自我介绍の方式: I am +姓名 I’m +姓名 My name is +姓名 2.问候语: (1)Good morning.早上好. Good afternoon.下午好. Good evening.晚上好. Good night.晚安.(2)Hi/Hello! 你好。(用于非正式场合。) (3)Nice to meet you. 很高兴见到你。 回答用Nice to meet you, too. 我也很高兴见到你。(用于第一次见面) (4)Nice to see you. 很高兴见到你。 回答用Nice to see you, too. 我也很高兴见到你。(用于熟人之间の见面) (5)How do you do ?你好。 回答也用:How do you do? (用于初次见面,正式场合) (6)How are you ? 你好吗? 回答:Fine,thanks.谢谢,我很好。(用于熟人之间询问对方身体健康状况。) 也可以回答:Fine. /I’m fine./I’m OK. 3.welcome to+地点欢迎来到某地 4.Are you…? 你是...吗? 肯定回答:Yes, I am.是の,我是。(I am不能缩写为I’m) 否定回答:No, I’m not. 不,我不是。 5.This is …. 这是... (对第三方の介绍)、 6.M r.先生(在学校内指男老师)M rs.夫人(已婚女士) M iss女士,小姐(未婚,在学校内指女老师)M s.女士(不清楚婚否)

必修二unit1知识点总结

必修2 Unit 1 Cultural relics 1. in search of…寻找… Search sb 搜身search for 寻找 search sb. / a place for sth. 搜身/搜查某个地方找某事物 2. could not/never have done 不可能做过某事 3. be used to do sth. 被用来做…The wood will be used to make tables and chairs. be used to doing sth. 习惯于做…He is used to living with the farmers now. used to do sth. 过去常常做…She used to come a lot, but now we seldom see her. 4. make it 达到目的,取得成功 5. in the fancy style 以一种奇特的风格 in style 流行out of style 过时 6. decorate. v. 装饰decoration. n. 装饰decorate sth. with sth. be decorated with sth. 7. survive: v. 生存,存活,经历(事故、灾难后)还活着,幸存,比…长寿 survival: n. 生存,幸存survivor: n. 幸存者 8. by design = on purpose 故意地by chance = by accident 偶然地 9. belong to 属于,是…其中的一员或一部分(无被动,无进行时) In our country, land doesn’t belong to any individual. Belonging to the developing countries, China faces many difficulties. 10. in return 作为报答in return for…作为对…的报答 11. Serve v. 服务service n. 服务serve as 担任,充当 He serves as a waiter here. The box can serve as a table. 12. reception desk 接待处give a warm reception to…热情地接待… 13. have/get sth. done 使…被做 I must have/get my homework finished before going out to play. 14. light: v. 点燃,照亮light up 点(烟),照亮,(使)变亮,(脸等)放光彩 Her eyes lit up with joy. light的过去式和过去分词有两种:lit和lighted,作为动词时二者可通用,但作定语时,只能用lighted. He lit/lighted a candle and handed the lighted candle to me. 15. consider doing sth. 考虑做…. be considered to be…被认为… 16. wonder: v. 想知道,感到惊奇,疑惑n. 奇迹,奇人/事 (It’s) no wonder (that)…难怪…He hasn’t slept at all for three days. No wonder (that) he is worn out. 17. at war 处于战争状态 18. remove:v. ①搬开,拿开,移动②去掉,消除③脱掉④搬家,迁移 His name was removed from the list. 19. furniture: n. 家具(不可数) a piece of furniture = an article of furniture They didn’t buy much furniture before they got married. 20. doubt: v. n. 怀疑,疑惑

质数与合数问题(含答案)--第一部分

五年级奥数:数的整除问题(含答案)——第一部分(共5题) 2014年5月21日星期三 【例题1】: 今有10个质数:17,23,31,41,53,67,79,83,101,103.如果将它们分成两组,每组五个数,并且每组的五个数之和相等,那么把含有101的这组数从小到大排列,第二个数应是(). 考点:质数与合数问题. 分析:可以先求出这10个质数的和是多少,根据已知条件,把这10个质数分成两组,即可求出每组5个质数的和,然后在分析每组数各有哪几种情况,由此解答即可. 解答:这10个质数之和是598,分成两组后,每组五个数之和是598÷2=299. 在有79这组数中,其他四个质数之和是299-79=220,个位数是0,因此这四个质数的个位数可能有三种情形: (1)三个1和一个7; (2)二个3和二个7; (3)三个3和一个1. 31+41+101=173,220-173=47,可这十个数中没有47,情形(1)被否定. 17+67=84,220-84=136,个位数为3有23,53,83,只有53+83=136,因此从情形(2)得到一种分组:17,53,67,79,83和23,31,41,101,103. 所以,含有101这组数中,从小到大排列第二个数是31. 注:从题目本身的要求来说,只要找出一种分组就可以了,但从情形(3)还可以得出另一种分组.23+53+83+103=262,262-220=42,我们能否从53,83,103中找出一个数,用比它少42的数来代替呢? 53-42=11,83-42=41,103-42=61.这十个数中没有11和61,只有41.又得到另一种分组: 23,41,53,79,103和17,31,67,83,101. 由此可见,不论哪一种分组,含101这组数中,从小到大排列,第二个数都

Unit 1 单元测试题 1

单元测试题 1 英语知识运用(共两节,满分45分) 第一节:语法填空(共10小题;每小题1.5分,满分15分) 阅读下面短文,按照句子结构的语法性和上下文连贯的要求,在空格处填入一个适当的词或使用括号中词语的正确形式填空。 Christmas is the biggest festival in Britain and 21. ________ (celebrate) on 25th December. The four weeks before Christmas are called Advent [(耶稣)降临节], and are traditionally celebrated in churches by lighting 22. ________ candle each Sunday during Advent. Nowadays, many people in Britain are not very religious, 23. ________, they still celebrate Christmas. But watch out — the preparations begin long 24. ________ Advent. In fact, as early as September or October, you start to see signs that Christmas is on the way. So what do people buy to prepare 25. ________ Christmas? They often prepare Christmas 26. ________ (decorate), Christmas cards to be sent to their friends, presents for their loved ones and beautiful wrapping paper. And of course food! Apart from the special Christmas dinner of roast turkey or goose, people buy lots of chocolates, nuts and snacks for everyone 27. ________ (enjoy). But the children are the 28. ________ (happy) when Christmas is coming. They start making lists of presents they would like, and give 29. ________ to their parents. In December, they can also open their Advent calendars, 30. ________ is a way of counting down to Christmas. They have a window to open for every day from 1st-24th December. 第二节:完形填空(共20小题;每小题1.5分,满分30分) 阅读下面短文,从短文后各题所给的四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项。 Johnathan, a six-year-old from Milton Keynes, will share the stage with a host of famous people, after winning an award for bravely fighting against his illness. He was 31 from hundreds of nominations (提名) across the UK to win the Inspirational Child in 2013 WellChild Awards, which celebrate the 32 of children

相关文档
相关文档 最新文档