第18周周末试卷
18第十八周综合实践

一、本周主要内容综合实践二、本周学习目标(一)住房的变化1、进一步掌握收集、整理、描述和分析数据的方法,感受折线统计图的特点,能根据统计图表和统计量所呈现的信息进行一些简单的分析和思考,增强数据分析意识、发展统计观念。
2、引导学生综合运用统计方面的知识和方法解决实际问题,使学生进一步加深对折线统计图和统计表作用的体验,提高学生动手实践、自主探究、合作交流的能力,发展学生的数学思考。
3、让学生感受到我国社会的发展与进步,对学生进行爱祖国、爱家乡的教育。
(二)旅游费1、阅读分析教材提供的各种信息,引导学生结合自身的生活经验说说对这些信息的理解。
2、能独立收集信息,利用教材提供的信息和实际需要,通过计算、比较,有序思考,解决一些与旅游费用的预算有关的实际问题。
3、帮助学生进一步提高综合运用数学知识和方法解决实际问题的能力,增强数学应用。
4、在解决实际问题的过程中,体会解题策略的多样性。
(三)绿地面积1、通过阅读统计图表以及实际调查和测量,了解我国城市以及所在学校的人均绿化面积,体会绿地对于改善居住环境的意义。
2、引导学生认真阅读统计图表,对所阅读的材料和所调查所得的材料能够进行科学的分析与反思,培养学生分析数据的能力。
3、通过开展一些实践活动,培养学生的动手实践、合作交流等各方面的能力。
4、通过调查和阅读等活动,体会到我国与先进国家在绿化方面的差别,从小培养学生的绿化和环保意识。
(四)保护水资源1、阅读分析教材提供的材料,了解我国水资源的现状。
2、小组合作实验获得滴水龙头、洗脸,洗手的用水量,完成统计表和统计图。
估算、推算出相关数据。
3、通过对数据的分析对比,增强节水意识。
4、通过综合应用,培养学生应用数学知识与方法解决实际的能力,提高学习数学的兴趣。
三、考点分析(一)住房的变化1、复式统计表。
2、折线统计图的制作及分析。
3、求平均数的应用问题。
4、综合实践——社会调查。
(二)旅游费1、在解决旅游问题时,要利用生活经验正确理解旅游人数、出发地和目的地、起止日期、交通工具及在旅游目的地可能产生的开支情况等有关旅游活动的基本信息,弄清它们所表达的实际含义。
小学六年级数学周末试卷

一、选择题(每题2分,共20分)1. 下列数中,既是奇数又是质数的是()A. 17B. 16C. 18D. 202. 一个长方形的长是10厘米,宽是6厘米,它的周长是()A. 16厘米B. 26厘米C. 32厘米D. 36厘米3. 小明有3个苹果,小红有4个苹果,他们一共有()A. 5个苹果B. 7个苹果C. 8个苹果D. 9个苹果4. 如果一个数的3倍加上5等于17,这个数是()A. 4B. 5C. 6D. 75. 一个正方形的边长是8厘米,它的面积是()A. 64平方厘米B. 32平方厘米C. 16平方厘米D. 8平方厘米6. 下列分数中,最大的是()A. $\frac{3}{4}$B. $\frac{5}{6}$C. $\frac{7}{8}$D. $\frac{2}{3}$7. 一个圆的半径是5厘米,它的直径是()A. 10厘米B. 15厘米C. 20厘米D. 25厘米8. 小华骑自行车去学校,每小时行驶12千米,他用了1小时到达学校,那么他家离学校()A. 6千米B. 12千米C. 18千米D. 24千米9. 下列数中,能同时被2和3整除的是()A. 14B. 15C. 16D. 1710. 小明有10元,他买了一个文具盒花了5元,还剩()A. 5元B. 6元C. 7元D. 8元二、填空题(每题2分,共20分)11. 5个苹果的重量是1千克,那么1个苹果的重量是()12. 一个长方形的长是12厘米,宽是6厘米,它的面积是()13. 一个数的2倍加上4等于20,这个数是()14. 一个圆的半径增加了2厘米,它的面积增加了()15. 小华家买了一个电饭煲,比原来计划的便宜了20元,实际支付了180元,那么原计划支付()16. 下列数中,最小的整数是()17. 一个正方形的周长是36厘米,它的边长是()18. 小明骑自行车去公园,速度是每小时15千米,他用了2小时到达公园,那么他家离公园()19. 一个数的5倍减去3等于12,这个数是()20. 下列数中,最小的质数是()三、解答题(每题10分,共30分)21. 小华有一些糖果,他分给小明3个,然后又分给小红4个,最后还剩5个。
苏教版小学一年级语文下册第17周周练试卷

一年级语文18周周练班级姓名一、看拼音,写词语。
pá shùliú shuǐhēi bǎn lái wǎnɡlìqi kǒu kě()()()()()()gōngyuán yǔ yán kūshēng bàn fǎfēn biéhuà shān()()()()()()zhōng yúděng hòu nián dài jiàn jian kàn jiàn sī mǎ guāng ()()()()()()二、比一比,再组词。
半()流()已( ) 往( ) 忽()办()牛()己( ) 住( ) 呼()油()终()于()候()没()由()中()干()后()梅()三、根据课文内容填空。
1、有一天,鲁班( )船回家,看到老艄公用竹篙撑船( ) ( ) 吃力。
等把船撑到对岸,老艄公( ) 经累得( ) ( ) ( ) ( )了。
2、乌鸦看见( ) ( )有许多( ) ( ) ( ),( ) ( )想出( ) ( )来了。
它叼起小石子,一颗一颗地( ) ( )瓶子里。
瓶子里的水( ) ( ) ( ) ( )了,乌鸦就( ) ( ) ( )了。
3、宋代的寇准七岁时写了一首诗:只有( ) ( ) ( ),更无( ) ( ) ( )。
举头( ) ( ) ( ),( ) 首( ) ( )低。
四、乱句成段。
(把序号写在括号里)()“谢(xiè)谢您!”小白兔说完就放心地睡了。
()兔妈妈不在家。
()小黄狗跑过来说:“小白兔,让我守卫在你家的门口。
”()晚上,天上没有星星。
()小白兔胆(dǎn)子小,不敢(gǎn)睡觉。
五、写出反义词笑——()高——()古——()里——()出——()粗——()六、看图写话观察图片,图上都有谁,他们在干什么?。
初一上册数学错题集

初一上册数学错题集姓名:杭泽林 2014年11月常州外国语学校七年级周末作业一16、一收费员从水厂出发,向东走了2千米到达小聪家,继续向东走了1.5千米到达小华家,又向西走了5千米到达小文家,最后回到水厂。
1、以水厂为原点,以向东方向为正方向,用一个单位长度表示1千米,你能在数轴上表示出小聪家、小华家和小文家的位置吗?2、小聪家距小文家多远?3、收费员一共走了多少千米?常州外国语学校七年级周末作业二15、数轴上原点右边4.8厘米处的点表示的有理数是32,那么,数轴原点左边18厘米处的点表示的有理数的常州外国语学校第四单元练习1、小华在某月的日历中圈出了三个数,并算出这三个数的和是39,则小华圈出的三个数的排列形式不可能是:()A、xB、x x xC、x xD、x xX x x x2、如图是一个长方形块图,由6个大小不完全相同的正方形组成,设中间最小的一个正方形边长为1,则这个长方形的面积为3、某物流公司的甲、乙两辆货车分别从相距300千米的A、B两地同时出发相向而行,并以各自的速度匀速行驶,两车行驶1.5小时时甲车先到达配货站C地,此时两车相距30千米,甲车在C地用1小时配货,然后按原速度开往B地;乙车从B地行驶2小时时也到C地,未停留继续开往A地。
(友情提醒:画出线段图帮助分析)(1):乙车的速度是千米/小时,B、C两地的距离是千米,A、C两地的距离是千米;(2):求甲车的速度及甲车到达B地总共用的时间;(3):乙车从B地出发多长时间,两车相距150千米?常州外国语学校七年级周末作业五8、有一列数:-1/2、2/5、-3/10、4/17……,那么第n个数是常州外国语学校七年级周末作业七1、为鼓励节约用水,某地推行阶梯式水价计费制,标准如下:每月用水不超过17m3的按每立方米a元计费;超过17m3而未超过30m3 的部分按每立方米b元计费;而超过30m3的部分按每立方米c元计费。
某户居民上月用水35m3,应交水费为常州外国语学校七年级周末作业九10、若:(2x+1)=常州外国语学校七年级第十二周周末作业1、幼儿园有一批卡通书,若3个小朋友合着一本,则多2本;若2个小朋友合着看一本,则有9个小朋友没有书看,共有多少个小朋友?1如图,已知矩形ABCD中,AB=3cm , BC=5cm,点P从点A出发,沿着矩形的边逆时针运动,速度为1cm/s;同时点Q从点C出发,也沿着矩形的边逆时针运动,速度为1,8cm/s。
二年级奥数周周练 第18周 植树问题(一) (教师版)答案

第18周植树问题(一)一、知识要点植树的学问真不少,这里面有许多有趣的问题,做这类题目要多动脑筋,弄清题意,理解树的棵数与间隔数的关系,掌握植树的解题方法,问题就迎刃而解了。
植树的问题,应该注意如果起点和终点都植树,树的棵数比间隔数多1,如果起点和终点不植树,树的棵数比间隔数少1,在解答这类应用题时,应该看清楚题目要求,然后根据棵数与间隔数的关系,结合已知条件,就能找到解决问题的方法了。
二、精讲精练【例题1】一条路长72米,在路的一边每隔8米栽1棵松树,从头到尾一共可以栽多少棵松树?【思路导航】每隔8米栽一棵树,72里面有9个8,这个9其实就是把72米平均分成了9个间隔,因为从头到尾都要栽树,所以树的棵数比间隔数多1,即9+1=10(棵),也就是棵数比间隔数多1。
72÷8+1=10(棵)答:一共可以栽10棵松树。
练习1:1.学校门前的一条路长42米,在路的一边从头到尾栽树,每7米栽一棵,一共能栽多少棵?42÷7+1=7(棵)答:一共能栽7棵。
2.教室前面到教室后面长8米,从头到尾每隔2米摆一盆花,一共摆了多少盆花?8÷2+1=5(盆)答:一共摆了5盆花。
3.学校门前的一条路长56米,为迎接国庆节,在路的一边从头到尾都插上彩旗,每7米插一面,一共要插多少面彩旗?56÷7+1=9(面)答:一共要插9面彩旗。
【例题2】同学们在一条公路的两边从头到尾每隔6米栽一棵树,共栽了22棵,这条公路长多少米?【思路导航】在路的两旁栽树,共栽了22棵,那么每边栽了22÷2=11棵,由此可知,就是把这条路的每边分成了11-1=10(段),又因为每段是6米,10×6=60米,这就是这条公路的长了22÷2=11(棵)11-1=10(段)6×10=60(米)答:这条公路长60米。
练习2:1.少先队员在路的两旁每隔5米栽一棵树,起点和终点都栽了,一共栽了72棵树,这条路长多少米?72÷2=36(棵)36-1=35(段)5×35=175(米)答:这条路长175米。
苏教版小学一年级语文下册第18周周练试卷

) 同(
) 司( ) 园(
)
) )
己(
) 圆(
)
写出反义词。
进—( ) 先—( ) 无—( )
圆—( ) 哭—( ) 去—( ) 低—( ) 生—( ) 单—( )
外—( )
填上合适的词语。
(
( (
)的叶子
)的夏天 )的太阳
(
( (
)的华山
)的小花 )的贝壳
根据课文内容填空。 1.别的( )( )( )都慌了,有的 ( ),有的喊,还有的( )( )( ) 大人。 2.一只乌鸦( )( )了,( )( ) ( )( )喝。 3.小松鼠( )( )都到( )( ) 地里去,看( )( )结果了( ) ( )。可是,直到( )( )( ) ( )( )都落光了,也( )( ) ( )一个花生果。
读拼音,写词语。 zì jǐ kǒu kě zhōng yú
(
)(
) (
bàn fǎ
)
páng biān )
gǔ shí hou (
)(
)(
měi tiān
( )
zì yán zì yǔ
( )
给下列加横线字注音。
使劲(
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砸缸(称赞ຫໍສະໝຸດ 留着()) )比一比,再组词 。
光(
考考你。 例:鲁班模仿鸭子的脚发明了橹板。
人们模仿____________发明了直升机。
人们模仿薄公英发明了___________。 人们模仿_______发明了__________。
把句子补充完整。 1.体会运动会上,运动员有的在 ___________,有的在_________,还 有的在______。 2.小朋友在表演节目,有的 ___________,有的___________,还 有的_____________。
四数上第18周练习

一、看谁算得又对又好。
1.直接写出得数。
63÷3=
60+47=
15×30=
0×560=
2.用递等式计算。
244-6×28
1000-38×20
17×6= 40×6=
66÷11= 720÷60=
78+240÷4
54×(71-33)
(222-51)÷3
81÷(68-59)
少钱?
四年级上册数学第三周周末练习 2014.9
一、算算填填
1.直接写得数。
65÷5=
90÷18=
25×4=
240÷30=
84÷14=
560÷80= 420÷70= 72÷4=
69÷23=
460÷10=
480÷20= 750÷30= 280÷70= 200÷50=
320÷40=
2.填空
(1)括号里最大能填几。
千克,三班需要 22 千克。 (1)每班分别购买,各需要多少元?
数量(千克) 1-20 21-50 50 以上
单价(元) 25
20
15
(2)三个班合起来购买,共需要多少元?
《哈利·波特》 成人票:每张 10 元 6.实验小学组织四年级学生去观看电影,学生有 学生票:每张 5 元 560 人,教师有 26 人。电影院售票处写着(右图),请团设体计票:每张 6 元 40 人(含 你认为最省钱的购票方案,并算出购票一共需要多 40 人)以上可购买团体票。
()
2.明明今天喝了 400 毫升牛奶。
()
3.水瓶的容量比奶瓶的容量大。
()
4.用滴管滴 100 滴水大约是 100 毫升。
(第18周)(初三英语)期末总复习(一)

2012—2013上学期一对一周末辅导试卷—(第18周)学生姓名:成绩:期末总复习(一)一. 名词、冠词( )1.– What can I do for you? -- I'd like two _______.A. box of appleB. boxes of applesC. box of applesD. boxes of apple( )2.He is _______ uncle of mine. He works at ________ university.A. a, anB. an, anC. an; aD. an, ×( )3. youngest leader in China is from ____ island .A.The;an B.A;the C.A;a D.the ;a( )4.What useful book! And book was given to me by my father as a birthday present last year.A the, \B an, theC \, \D a, the( )5.________ it is today!A. What fine weatherB. What a fine weatherC. How a fine weatherD. How fine a weather( )6.We will have a _________ holiday after the exam.A. two monthB. two-monthC. two month'sD. two-months( )8._________ people here are very friendly to us.A. TheB. /C. AD. An二. 代词( )1. Some people like to stay at home, but ________ like to go to the cinema.A. anotherB. otherC. othersD. other one( )2. There are three students in the reading room. One is a boy, ______ two are girls.A. the othersB. the otherC. otherD. another( )3. -- Is this your shoe? -- Yes, but where is _________?A. the other oneB. other oneC. another oneD. the others( )4. – When shall we meet again next week? -- _______ day is possible. It's no problem with me.A. EitherB. NeitherC. EveryD. Any( )5. Have you ever seen ________ big panda before?A. a suchB. such aC. so aD. a so( )6. -- _______ do you write to your parents? -- Once a month.A. How longB. How soonC. How oftenD. How far( )8. – What do your parents do? -- One is a teacher; _________ is a driver.A. otherB. anotherC. the otherD. that one( )9. There are many trees on ________ side of the street.A. eitherB. anyC. allD. both三. 介词、连词( )1 Japan is ________ the east of China.A. inB. toC. onD. at( )2 He hasn't heard from his friend __________ last month.since B. by the end of C. for D. until( )3 I didn't buy the dictionary yesterday _________ my aunt would give me one.A. untilB. becauseC. ifD. before( )4 I'm going to look for another job ________ the company offers me more money.A. afterB. unlessC. whenD. for( )5 Don't hurry. The bus won't start ________ everybody gets on.A. sinceB. asC. untilD. when( )6 ______ the maths problem is difficult, I'll try very hard to work it out.A. ThoughB. WhenC. BeforeD. After( )7He turned ________ the radio because his father was asleep.A. onB. downC. upD. over四. 动词及时态( )1.Though it's cloudy now, it _________ get sunny later.A. canB. mayC. mustD. need( )2.It is in the library, you _______ talk loudly.A. may notB. can'tC. needn'tD. mustn't( )3.If anyone wants to say something in class, you ________ put up your hands first.A. mustB. mayC. shouldD. can( )4.I called you last night but no one answered the phone. -- I ________ dinner with my friends in the restaurant.A. haveB. hadC. was havingD. have had( )5.If you have lost a library book, you have to _________ it.A. find outB. look afterC. pay forD. take care( )6. The glass ______ . It _____ by little Tom this morning.A. broke, is brokenB. is broken, was brokenC. was broken, brokeD. has been broken, broken( )7.How many books _____ they ________?-- Five. But they haven't finished reading even one.A. did borrowB. had borrowedC. will borrowD. do borrow( )8. A strange thing _____ in our school yesterday.A. was happenedB. has been happenedC. happenedD. was going to happen( )9. There _____some showers this afternoon.A will beB will haveC is going to beD are going to have( )10. When I got home, my son _____ the music.A am listening toB listened toC was listening toD was listening( )11. She _____her keys in the office so she had to wait until her husband ____home.A has left; comesB had left; would comeC had left; cameD left; had come五. 形容词、副词( )1The population of the world in 20th century became very much _________ than that in 19th.A. biggerB. largerC. greaterD. more( )2Miss Li is one of _______ in our school.A. a popular teacherB. more popular teacherC. most popular teacherD. the most popular teachers( )3Would you like ________ more tea? -- Thank you. I've had ________.A. any, muchB. some, enoughC. some, muchD. any, enough( )4What's the weather like tomorrow? -- The radio says it is going to be even ______.A. badB. worstC. badlyD. worse( )5Though she talks ______, she has made ________ friends here.A. a little, a fewB. little, fewC. little, a fewD. few, a few( )6He never does his work _______ Mary.A. as careful asB. so careful asC. as carefully asD. carefully as六. 固定短语及句型( )1. Would you please drive faster ? My flight is _________.A. taking offB. getting offC. turning offD. putting off( )2. On October 15, 2003 China_____ its first man-made spaceship, which made Y ang Liwei a hero to many kids.A. set outB. Set offC. sent upD. sent out( )3. ---How is the play going ? ---We are going to _______ the day after tomorrow.A. put on itB. put it offC. put it onD. put it off( )4. Mr Green is busy _______ the newspaper while his wife is busy ______ the housework.A. reading ; withB. to read ; withC. to read ; doingD. with ; to do( )5. We have to _______ our things if we travel on a train or a bus.A. look atB. look upC.look likeD. look after( )6. ---If you ______ a new idea, please call me as soon as possible. --- Sure, I will.A. keep up withB. catch up withC. feed up withD. come up with( )7. ---Zhou Jielun is so cool. I’m his fan. ---____________.A. So do IB. So I doC. So am ID. So I am( )8. ---Y our new sweater looks beautiful. Is it _______ pure wool ? ---Y es, and it’s _______ Inner Mongolia.A. made by ; made forB. made of ; made byC. made of ; made inD. Made by ; made from七. 句法( )1. Would you please tell me ________ next, Mr Wang?A. what should we doB. we should do whatC. what we should doD. should do what( )2. Alice has gone to the classroom and she didn't say ________.A. when did she come backB. when would she be backC. when she came backD. when she would be back( )3. I'm sorry I broke your coffee cup. -- Oh, really? _________.A. It doesn't matterB. I don't knowC. it's OK with meD. Y ou're welcome( )4. Would you mind calling me back tomorrow again? -- _________.A. Not at allB. Y ou're welcomeC. Y ou're rightD. Nice to meet you( )5. He hardly had anything to eat, ________ he?A. didn'tB. hadn'tC. hadD. did( )6.-Tell him about the news when he ____ ,John. -Y es, I will.(宁波)A comesB will comeC wouldD is coming( )7.Do you know when he ______ tomorrow?A. arrivesB. will arriveC. arriveD. will arrives( )8.Don’t leave until he ___ back.(广东)A have comeB comesC will comeD came( )9.I will phone you as soon as she _____________ the station.(广东)A. arrives atB.will arrive atC. arrives inD. will arrive in( )10.If you insist climbing the tree, you _______ hurt yourselfA. mayB. will mayC. will beD. /综合检测一. 单项选择( )1.–What a hot day! Have you had a drink? -- Y es, but I’d like to have after work.A itB oneC otherD another( )2.-- Have you got a ticket the Opening Ceremony of the Beijing Olympics?-- Y es, I got it my uncle.A of, fromB to, byC to, fromD or, to( )3. Lily Sam likes popular songs, so they went to Zhou Jielun’s concert together last night.A Both, andB Either, orC Not only, but alsoD Neither, nor( )4.Miss White teaches ______ maths.A. weB. ourC. usD. ours( )5.---Is that dog ? ---No.is yellow.A.his;His B.her;Itis C.he;His D.her;Her( )6.---Must we go there together at once?---______ you ______ he goes there because only one student is needed.A. Both; andB. Either; orC. Neither; norD. Not only; but also( )7.—Could you tell me _______?—Y es, he _______to the Disneyland.A. where was Daming; have beenB. where Daming was; have goneC. where is Daming; has beenD. where Daming is; has gone( )8.I don’t know if it ______ tomorrow. If it ______, we’ll have a picnic.A. rains; rainsB. will rain; will rainC. rain, doesn’t rainD. will rain; doesn’t rain( )9. —Look! How nice the building is! What is it used for? —It____ as a hotel. But I’m not sure.A. must be usedB. will useC. may be usedD. may use( )10. Many people are worried about the housing price that keeps ______ in recent years.A. to riseB. risingC. to raiseD. raising( )11. The old man thanked the girl ______ showed him the way to his son’s home.A. whatB. whichC. whoD. whom( )12. He didn’t rest ______ he finished the work.A. afterB. whenC. whileD. until( )13. Helen made many mistakes in the test. She realized that___is important to be careful.A. thatB. sheC. itD. this( )14. I hate the people ________ don’t help others when they are in trouble.A. whereB. whichC. theyD. who( )15. —We don’t know.—It is said that he was born in Canada.A.what he is B.when he was born C.where he comes from D.if he lives here( )16. I have bought the camera was advertised on TV.A.what B.why C.which D.who( )17. I don’t know .A where does he come fromB what is his nameC what is the matter with himD when will he leave( )18. The students don’t know next.A do whatB how to doC what to doD to do what二. 完形填空Tom grows the nicest vegetables and fruits and the most beautiful flowers in the village. Plants grow in Tom’s garden all through the __1__ and they are much __2__.Tom cuts some flowers for his sitting room table, eats some fruits and vegetables, but he __3__ most of them in the market. His vegetables, fruit and flowers are so __4__ and beautiful that they sold much more __5__ in the market than those of other villagers.How does Tom grow these beautiful things? He is so __6__ that he just sits under his orange tree with his radio.He __7__ the music all day.That is quite true. Tom __8__ things in spring, summer, autumn and winter. After that he sits with his radio. And everything __9__. It is the music that does the work. Tom knows more clearly that music makes the biggest vegetables and the most beautiful flowers. Plants love __10__ as much as people.( )1. A. week B. month C. season D. year( )2. A. better B. worse C. less D. later( )3. A. buys B. sells C. borrows D. lends( )4. A. dear B. bad C. big D. small( )5. A. politely B. quickly C. slowly D. carefully( )6. A. angry B. busy C. tired D. lazy( )7. A. listens to B. hears C. watches D. speaks( )8. A. fills B. plants C. throws D. makes( )9. A. does B. moves C. grows D. plays( )10.A. work B. rain C. stories D. music三. 根据图画内容,在下面空格内填入适当的单词On a fine Friday afternoon, the children were (1) _ ___ happily in the kindergarten (幼儿园). Some were dancing, some were singing and (2) _ ___ were playing with a ball.It was about half past three when a strong man in (3) _ ___ walked into the kindergarten. He looked around and then came over to a little boy (4) _______ Xiao Ming. He caught the boy’s arm. He wanted to take the boy away for a lot of money (5) the boy’s father was a rich man in the town. The boy (6) loudly.Miss Lin was the teacher (7) duty that day. When she saw that, she rushed to the man and called out,―Stop! Stop! Don’t hurt the boy!‖ The strong man brought out a knife and shouted back, ―Go away! (8) I will kill you!‖ Miss Lin wasn’t (9) . She stood in front of the boy to stop the man, ―Let the boy go!‖ The bad man was so angry that he waved (挥舞) his knife and hurt Miss Lin’s hand with it.Another teacher (10) the noise. She called the policeman quickly. The boy was saved.How brave (勇敢的) Miss Lin was!。
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2019-2020学年第二学期
北大培文佛山实验学校七年级数学科十八周末作业
学生姓名_______________家长签名______________
一.选择题(10×3分=30分)
1.计算(﹣a 2b )3的结果是( ) A .﹣a 6b 3
B .a 6b
C .3a 6b 3
D .﹣3a 6b 3
2.计算(x ﹣2)x =1,则x 的值是( ) A .3
B .1
C .0
D .3或0
3.计算(a +2)(a ﹣3)的结果是( ) A .a 2﹣6B .a 2+6 C .a 2﹣a ﹣6 D .a 2+a ﹣6
4.如图,在边长为a 的大正方形中剪去一个边长为b 的小正方形,再将图中的阴影部分剪拼成一个长方形,若这个拼成的长方形的长为35,宽为15,则图中Ⅱ部分的面积是( ) A .100 B .125 C .150 D .175
5.x 2﹣4x +m 2是一个完全平方式,则m 的值是( ) A .2
B .﹣2
C .+2和﹣2
D .4
6.图①是一个长为2a ,宽为2b (a >b )的长方形,用剪刀沿图中虚线(对称抽)剪开,把它分成四块形状和大小都一样的小长方形,然后按图②那样拼成一个正方形,则中间空的部分的面积是( ) A .ab
B .a 2+2ab +b 2
C .a 2﹣b 2
D .a 2﹣2ab +b 2
7.下列画图语句中正确的是( ) A .画射线OP=5cm
B .画射线OA 的反向延长线
C .画出A 、B 两点的中点
D .画出A 、B 两点的距离
8.正方形ABCD 的边长为2,点E 、F 分别是对角线BD 上的两点,过点E 、F 分别作AD 、AB 的平行线,如图所 示,则图中阴影部分的面积之和等于( ) A .1
B .2
C . 3
D .4
9.如图,在△ABC 中,∠C=90°,BE 平分∠ABC ,DE ⊥AB 于D ,如果AC=2cm ,那么
完成 日期 得分
AE+DE等于()
A.2cm B.3cm C.4cm D.5cm
10.如图,矩形ABCD中,AB=1,BC=2,点P从点B出发,沿B→C→D向
终点D匀速运动,设点P走过的路程为x,△ABP的面积为S,能正确反映S
与x之间函数关系的图象是()
A.B.C.D.
二、填空(6×4分=24分)
11.对于任何实数,我们规定符号的意义是:=ad﹣bc,按照这个规定计算:当x2﹣3x+1=0时,的值为.
12.如图,把一块含45°角的直角三角板的直角顶点放在直尺的一边上,如果∠1=33°,那么∠2为°.
13.从长为3,5,7,10的四条线段中任意选取三条作为边,能构成三角形的
概率是_____________
14.如图,AB=DE,∠B=∠E,使得△ABC≌△DEC,请你添加一个适当的条
件(填一个即可).
15.已知x2﹣4x+3=0,求(x﹣1)2﹣2(1+x)=.
16.甲、乙两人骑自行车匀速同向行驶,乙在甲前面100米处,同时出发去
距离甲1300米的目的地,其中甲的速度比乙的速度快.设甲、乙之间的距
离为y米,乙行驶的时间为x秒,y与x之间的关系如图所示.若丙也从甲
出发的地方沿相同的方向骑自行车行驶,且与甲的速度相同,当甲追上乙后
45秒时,丙也追上乙,则丙比甲晚出发秒.
三、解答题(46分)
17.计算(6分)
()﹣2﹣23×0.125+20150+|﹣1|
18.(6分)如图,在平面直角坐标系中,△ABC的
三个顶点都在格点上,点A的坐标为(2,4).
(1)画出△ABC关于y轴对称的△A1B1C1;
(2)在x轴上找一点P,使△PBC的周长最
小.(标出点P即可,不用求点P的坐标)
19.(8分)父亲告诉小明:“距离地面越远,温度越低,”并给小明出示了下面的表格.距离地面高度(千米)0 1 2 3 4 5 温度(℃)20 14 8 2 ﹣4 ﹣10
根据上表,父亲还给小明出了下面几个问题,你和小明一起回答.
(1)上表反映了哪两个变量之间的关系?哪个是自变量?哪个是因变量?
(2)如果用h表示距离地面的高度,用t表示温度,那么随着h的变化,t是怎么变化的?(3)你知道距离地面5千米的高空温度是多少吗?
(4)你能猜出距离地面6千米的高空温度是多少吗?
20. (8分)如图,在△ABC中,∠ABC=90°,AB=7,AC=25,BC=24,三条角平分线相交于点P,求点P到AB的距离.
21.(9分)杨阳同学沿一段笔直的人行道行走,在由A步行到达B处的过程中,通过隔离带的空隙O,刚好浏览完对面人行道宣传墙上的社会主义核心价值观标语,其具体信息汇集如下:如图,AB∥OH∥CD,相邻的平行线间的距离相等,AC,BD相交于O,OD⊥CD.垂足为D,已知AB=18米,请根据上述信息求标语CD的长度.
22.(9分)如图1,在锐角△ABC中,∠ABC=45°,高线AD、BE相交于点F.
(1)判断BF与AC的数量关系并说明理由;
(2)如图2,将△ACD沿线段AD对折,点C落在BD上的点M,AM与BE相交于点N,当DE∥AM时,判断NE与AC的数量关系并说明理由.。