9上期中1-6基础复习题(1)

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2024秋九年级语文上学期期中复习题新人教版

2024秋九年级语文上学期期中复习题新人教版

九上1-3单元复习一、基础1.下列词语字形和加点字注音全部正确的一项是()A.格外..(fēn)惊赅忧戚.(qì)摇曳B.娉.婷(pīn)赫免瞥.见(piē)亵渎C.箴.言(zhēn)旁骛轻觑.(qù)宽宥D.鲜妍(yán)濡养佝偻.(lóu)恪守1.D(A.fēn-fèn,赅-骇,qì-qī;B.pīn-pīng,赫-赦;C.骛-鹜)2.下列词语字形全部正确的一项是()A.妩媚冠冕呢喃红妆素裹B.贸然勃发禅师扭捏作态C.秘决劫掠制裁形消骨立D.游弋困噩灰烬言不及意2.B(A.妆-装;C.决-诀,消-销;D.噩-厄,意-义)3.下列句子中加点词语运用有误的一项是()A.即使处于间不容发....的境地,我们也不能慌乱,要学会从容面对。

B.不学无术的他获得了一笔意外之财后,买了不少书画,竟也学会了附庸风雅....。

C.交警叔叔真是火眼金睛,总能识破酒驾人员李代桃僵....的把戏。

D.这次期中考试,我们班的成果虽然不错但与最好的班级比较,就相得益彰了。

3.D(相得益彰:指两个人或两件事物相互协作,双方的实力和作用更能显示出来。

语境运用错误)4.下列句子中加点词语运用有误的一项是()A.理解小说中的人物形象,必需从整体入手,任何断章取义....的分析都是不行取的。

B.别总是对别人吹毛求疵、自惭形秽....。

C.整个科研过程他都没有参加,最终却鸠占鹊巢....,把功劳占为己有。

D.不一会儿,暴风雨就歇斯底里....地起先了。

4.B(自惭形秽:因为自己不如别人而感到惭愧。

运用对象错误)5.对下列语段中复句类型推断正确的一项是( )2024年9月29日,于漪老师作为基础教化领域唯一的获奖者,荣获“人民教化家”国家荣誉称号。

①于老师总是衣着朴实,面带微笑,心中装着祖国的将来。

②她放不下学校里就读的莘莘学子,更惦记着在基础教化领域发生着的种种变革。

③虽然年届九旬,她仍行走在语文教化的第一线。

九年级上期中考试题

九年级上期中考试题

新智源教育开设中、小学数学、英语、物理、化学、 地理、生物等课程一对一、一对二、一对四辅导1 第10题DCBAO九年级期中考试复习题一、选择题:1、在下图右侧的四个三角形中,不能由△ABC 经过旋转或平移得到的是( )A B C D2、如图,正方形ABCD 旋转后能与正方形CDEF 重合,G 为DC 中点,那么图形所在的平面上不能作为旋转中心的点是( ).A .A 点 B .C 点 C .D 点 D .G 点3、4张扑克牌如图(1)所示放在桌子上,小敏把其中一张旋转180º后得到如图(2)所示,那么她所旋转的牌从左数起是( ) A.第一张 B.第二张 C.第三张 D.第四张4、若方程02=++c bx ax )0(≠a 中,c b a ,,满足0=++c b a 和0=+-c b a ,则方程的根是( )(A )1,0 (B )-1,0 (C )1,-1 (D )无法确定5、方程x 2-5x -6=0的两根是( )A .6和-1 B 、-6和1 C 、-2和-3 D 、2和3 6、将方程x 2-2x=1进行配方,可得( )A 、(x -1)2=2 B 、(x+1)2=2 C 、(x -1)2=1 D 、(x -2)2=5 7、已知x=-1是方程x 2+mx -5=0的一个解,则m 的值及方程的另一个根分别是( ) A 、m=4,x 2=-5 B 、m=4,x 2=1 C 、m=-4,x 2=5 D 、m=-4,x 2=-1 8、观察下列图案,在A 、B 、C 、D 四幅图案中,能通过左图平移得到的是( )9、胜利中学 会议室内的会议桌是一个长方形,长1.6米,宽1米,学校准备制作一块长方形桌布,面积是桌面的2倍,且使桌面四周垂下的边等宽。

若设四周垂下的边为x 米,则应列得的方程为( ) A 、(1.6+x )(1+x )=1.6×1×2 B 、(1.6+2x )(1+2x )=1.6×1×2 C 、(1.6+x )(1+x )=1.6×1 D、2(1.6x+x )=1.6×110、如图,O 是边长为a 的正方形ABCD 的中心,将一块半径足够长,圆心为直角的扇形纸板的圆心放在O 点处,并将纸板的圆心绕O 旋转,求正方形ABCD 的边被纸板覆盖部分的面积为( )A.B.C.D.新智源教育开设中、小学数学、英语、物理、化学、 地理、生物等课程一对一、一对二、一对四辅导2BA. 213a B.214a C. 212a D. 14a 11、如上图是香港特别行政区区徽图,该图形围绕自己旋转中心,按下列角度旋转后,不能与自身重合的是( )A 、72° B 、108° C 、144° D 、216°12、用一个5倍的放大镜去观察一个三角形,对此,四位同学有如下说法:甲说:三角形的每个内角都扩大到原来的5倍;乙说:三角形的每条边都扩大到原来的5倍;丙说:三角形的面积扩大到原来的5倍;丁说:三角形的周长都扩大到原来的5倍.上述说法中正确的个数是( )A.1 B.2 C.3 D.4 13、如图,将△ABC 绕着点C 按顺时针方向旋转20°,B 点落在ABCDE位置,A 点落在A '位置,若B A AC ''⊥,则BAC ∠的度数是( )A .50° B .60° C .70° D .80°14、用一把带有刻度尺的直角尺,(1)可以画出两条平行的直线a 和b ,如图①;(2)可以画出∠AOB 的平分线OP ,如图②;(3)可以检验工件的凹面是否为半圆,如图③;(4)可以量出一个圆的半径,如图④.这四种说法正确的有( ) (A )4个.(B )3个.(C )2个.(D )1个.图① 图② 图③ 图④ 二、填空题:1、如图,AB 、CD 是大圆的两条互相垂直的直径,AB =22、若实数满足022=-+b ab a ,则ba= ; 3、一元二次方程x 2-3=0的根是__ _;4、已知方程x 2-2x -1=0的两个实数根分别是x 1、x 2,则(x 1-1)(x 2-1)5、若x 1、x 2是方程07x 5x 2=--的两根,那么__________x x 2221=+.________)x (x 221=-;6、如图,∠1的正切值等于_____________;7、一个小熊的头像如图所示.图中反映出圆与圆的四种位置关系,但是其中有一种位置关系没有反映出来.请你写出这种位置关系,它是____________. 三、解答题:1、用恰当的方法解方程(1)x 2+4x-3=0 (2)x-2=x(x-2) (3)49(x-3)2=16(x+6)22、今年,我国出台了“国十条”房地产宏观调控政策。

牛津英语译林版 9上 期中复习 专项训练 (完形填空)

牛津英语译林版 9上 期中复习 专项训练 (完形填空)

牛津英语译林版 9上期中复习专项训练(完形填空)1Nana Ekua Brew-Hammond, a writer, wondered where blue came from when she was reading a book. So she read more books and ___1___ that a kind of snail (蜗牛) was used to make blue dye (染料) in the past. By breaking the snail’s outer part, ___2___ people got blue dye.“It was very expensive___3___ thousands of snails were required to make only one kilogram of the dye, ” Brew-Hammond said. “It was amazing. I thought ___4___ need to know about this!”Blue is Brew-Hammond’s first children’s ___5___ . It follows the colour through ___6___ and places around the world. In the book, Brew-Hammond shares many facts. Afghans used rocks to make blue dye. In India, people ___7___ indigo plants. Thanks to Adolf von Baeyer, chemical (化学的) blues came into being in the 19th century. Baeyer also won the Nobel Prize for ___8___ the chemical blue. But for many years, blue was very difficult to ___9___ . As people made blue from daily cheap things, like flowers, it would lose colour over time.Maybe because of its scarcity (稀缺), blue became much more than a ___10___ . It had something to do with wealth (财富). “When something is needed by people, ___11___ by the rich ones, you’ll see something bad, ” said Brew-Hammond. In the past, some poor farmers in India were made to grow indigo plants ___12___ crops. They were tired, hungry and unhappy.“Is this ___13___ we feel ‘blue’ when we are sad?” Brew-Hammond said. “It’s interesting to study and ___14___ where the meaning comes from. What blue ___15___ is deeply connected with history. We have to read more to know that.”1. A. decided B. learned C. suggested D. expected2. A. local B. famous C. serious D. ancient3. A. if B. until C. since D. before4. A. kids B. adults C. teachers D. parents5. A. joke B. secret C. book D. song6. A. size B. time C. order D. space7. A. depended on B. looked after C. handed out D. took on8. A. creating B. recording C. describing D. preventing9. A. shape B. develop C. practise D. produce10. A. fact B. colour C. subject D. tape11. A. nearly B. hardly C. suddenly D. especially12. A. as usual B. instead of C. more than D. such as13. A. why B. how C. what D. where14. A. accept B. express C. discover D. translate15. A. looks B. explains C. improves D. represents2There may not be supermen in our life, but there are firemen. I think they are more ___1___ than supermen.It was a cold fall night. A fire department went to deal with (处理)a two-car accident. Both cars were badly broken. Luckily, all the people were ___2___ , including a couple and their little daughter. ___3___ the couple were busy with police reports, their daughter stayed alone. Ryan Benton, a fireman, ___4___ the little girl. He took a book, sat with her and started reading to her.A woman passed by and was ___5___ by the moment. She took a picture of them and shared it online with words “Sweetest thing ever! This fireman is reading a book to a little girl after a(n) ___6___ .” The picture caught people’s attention quickly. They found Ryan was different from what they knew about firemen. He showed a(n) ___7___ side of his job.Ryan saw the ___8___ , too. He also saw people’s high opinion (高度评价). But he refused to be interviewed for the story. He didn’t think there was anything to ___9___ . However, his fire department was quite proud of him. They put the picture on their website and ___10___ Ryan for his work. Ryan’s partner Abel talked about ___11___ Ryan had done with a reporter. “For Ryan, the moment shared with this little girl was just part of his job, ” Abel said.“Unknown to many, firemen’s ___12___ actually come with book bags. Each bag includes a toy and some books, ” Abel explained. “Things inside can help children pay less attention ___13___ terrible accidents. Amazingly, by calming kids with the book reading, adults can gain a sense of ___14___ , too.”“Our people are the light on a cold night. We will be there when people’s ___15___ moment happens. And we will try to make everyone feel safe, ” Abel said.1. A. curious B. generous C. powerful D. loyal2. A. safe B. successful C. hurt D. Healthy3. A. If B. Though C. After D. While4. A. searched B. noticed C. understood D. knew5. A. changed B. treated C. touched D. harmed6. A. accident B. earthquake C. flood D. rainstorm7. A. dangerous B. warm C. interesting D. ugly8. A. picture B. book C. report D. review9. A. get off B. turn off C. think about D. talk about10. A. paid B. praised C. invited D. corrected11. A. why B. when C. what D. how12. A. rides B. uniforms C. trucks D. pipes13. A. of B. with C. in D. to14. A. calm B. humor C. shame D. purpose15. A. luckiest B. happiest C. loneliest D. darkest3Before final exams, my classmates and I set up a table at the student activity centre to help students learn how to relax and reduce stress. We ___1___ some things that could help manage stress to students. They were all free and ___2___ to every student.It is ___3___ for students to feel stressed at school. They need to finish their homework, prepare for tests, and even ___4___ life problems. I felt a little ___5___ when I saw so many things listed on my calendar. Other students might have the same ___6___ , so we decided to start the activity.We chose some things ___7___ stress management tools, toys and hand sanitizers (消毒杀菌剂), etc. My favourite thing was a sleeping bag ___8___ an eyemask and earplugs (耳塞). Students in our school lived at school on weekdays. That meant we had to share a ___9___ with others. However, not ___10___ had the same timetable (时间表). I remembered one term, I always returned ___11___ at night because I was preparing for a play. I made a ___12___ and had to turn on the light. This affected (影响) my roommates a lot and I felt really ___13___ about that. If they had used the sleeping bag then, they might have slept better.There were lots of students ___14___ the student activity centre. Many students stopped by our table and asked what the table was for, or what kind of thing we could ___15___ . I am not sure how many of them will use the things when they feel stressed. But it will at least help more students take care of their mental (心理的) health.1. A. worked out B. handed out C. picked up D. made up2. A. serious B. close C. open D. creative3. A. simple B. hard C. strange D. usual4. A. put up B. take on C. show off D. deal with5. A. excited B. nervous C. afraid D. relaxed6. A. feeling B. dream C. plan D. choice7. A. for B. like C. about D. without8. A. including B. creating C. requiring D. producing9. A. secret B. hobby C. room D. story10. A. nobody B. somebody C. anybody D. Everybody11. A. late B. quickly C. loudly D. alone12. A. wish B. difference C. noise D. decision13. A. curious B. sorry C. crazy D. happy14. A. asking for B. looking at C. passing by D. talking about15. A. notice B. change C. run D. offer4We usually think that cultural inheritors (继承人) are old people, but this is not always the case. Both Lang Jiaziyu and Guo Yu’ang are ___1___ cultural inheritors. To make more people fall in love with traditional art forms, they try to make these art forms ___2___ and popular.Lang Jiaziyu, born in 1995, is an inheritor of Dough Figurine Lang (Mian Ren Lang). ___3___ a young inheritor, Lang knows what today’s young people like. In the past, people enjoyed ___4___ of characters such as Guan Yu and Monkey King. Now young adults ___5___ pop culture icons. So he brings pop culture icons into his art, like Bing Dwen Dwen. “My creations should always ___6___ with the times,” Lang said.Guo Yu’ang ___7___ people in the field of Peking Opera. The 25-year-old is an inheritor of the Mei School of Peking Opera. Most opera school students want to join a troupe (剧团). However, Guo chooses to give ___8___ of Peking Opera on Douyin. “Online sho ws can reach more people, ___9___ young adults,” Guo said. In fact, many of his fans went to the theatre to watch a Peking Opera show ___10___ they watched his Douyin short videos.Both Lang and Guo realize that many young people are interested in and ___11___ these art forms. The two inheritors do what they can to help with the ___12___ of Chinese culture. Lang 13his time improving his skills and making short videos. Guo plans to make more videos about Peking Opera and send them to his teacher for some ___14___ .“‘What can I do to improve my sculpting?’ I always ask ___15___ ,” Lang said. “I should keep on learning.”1. A. powerful B. curious C. young D. modes2. A. modern B. serious C. easy D. wise3. A. With B. As C. For D. Beside4. A. challenges B. sculptures C. standards D. picture5. A. accept B. hate C. believe D. prefer6. A. fight B. change C. share D. live7. A. promises B. requires C. respects D. impresses8. A. shows B. speeches C. lessons D. tickets9. A. certainly B. especially C. exactly D. generally10. A. while B. before C. after D. So11. A. good with B. busy with C. afraid of D. proud12. A. spread B. shape C. training D. celebration13. A. wastes B. forgets C. records D. spends14. A. money B. advice C. warmth D. trust15. A. himself B. herself C. ourselves D. myself5Frank Holdbrook from Ghana, Africa. graduated from Memorial University in Canada this year. ___1___, his road to graduation was difficult.Frank tried four times for a visa (签证) before finally being ___2___ . “It was a dream come true,” he said. “I really wanted to ___3___ abroad. It was one of my dreams. At an early ___4___, I was interested in studying business. I believed that learning skills, having the knowledge and getting the experience were ___5___ connected. ”Frank began his studies at Memorial University in the spring of 2019. Later, COVID-19 ___6___ the world, which made his mother at home unable to work. Without ___7___ support, Frank had to make money by himself. As an international ___8___, he was limited in the number of hours he could work. But he still tried everything he could. He ___9___ as a salesman at the supermarket, did the dishes at the restaurant and so on. “It was a really hard time and I felt very ___10___ . I just thought I couldn’t give up and that I had to keep going,” he said.Luckily, things turned ___11___ in 2021. Frank started his company One Nation Apparel and sold clothes with Ghanaian and African elements (特色). “When I came here, I could ___12___ see African clothes. I felt I could do something to ___13___ Ghanaian and African culture,” Frank said.Frank is passionate (热诚的) about business with a social ___14___ . He says, “My goal (目标) is to ___15___ something to help other people, not just for making money, but also for building a community and helping people achieve their dreams. ”1. A. However B. Instead C. Moreover D. Otherwise2. A. awful B. powerful C. colourful D. successful3. A. live B. study C. work D. travel4. A. job B. change C. age D. morning5. A. closely B. quickly C. easily D. loudly6. A. surprised B. passed C. saved D. hit7. A. his B. her C. our D. their8. A. student B. volunteer C. doctor D. reporter9. A. taught B. worked C. translated D. attended10. A. excited B. relaxed C. tired D. proud11. A. harder B. better C. stranger D. smaller12. A. hardly B. usually C. often D. always13. A. produce B. share C. doubt D. connect14. A. problem B. life C. position D. purpose15. A. hold B. afford C. create D. build6When Wendy McDowell was 8 years old, she once had to fly from Bismarck to Burlington. No one in her family could go with her. Her parents thought it would be ___1___ to ask a family friend to fly with her. There was no ___2___ flight between the two places. They had to fly to Chicago first. ___3___, when they arrived there, their connecting flight was cancelled (取消).___4___ the family friend did next shocked (使震惊) Wendy. The family friend bought ___5___ a ticket back home and left Wendy alone at the airport. Wendy didn’t know what to do and felt helpless ___6___ a woman walked over to her. The woman ___7___ spoke to Wendy and asked her where she was going and where her parents were. After learning about the ___8___, the woman got Wendy’s mother’s phone number. On the phone, she ___9___ Wendy’s mother that Wendy would be safe.The woman was flying to Pittsburgh, but she ___10___ her flight to Burlington to drop off (中途放下) Wendy. She told Wendy to ___11___ her and she said she would take care of Wendy. “And she indeed took care of me,” Wendy said.The kindness of the woman ___12___ Wendy deeply. She would never forget her. “The older I’ve got, the ___13___ I’ve been thinking about her,” she said.Now as a mother, Wendy has used her ___14___ to teach her son about kindness. “I want him to know that he can choose to be kind and ___15___ like the woman. I really appreciate (感激) her help,” she said.1. A. safe B. unusual C. wonderful D. quick2. A. international B. cheap C. direct D. short3. A. Finally B. However C. Luckily D. Also4. A. Which B. Why C. When D. What5. A. me B. us C. herself D. ourselves6. A. after B. until C. since D. while7. A. rudely B. gently C. suddenly D. seriously8. A. situation B. relationship C. choice D. record9. A. promised B. suggested C. reminded D. believed10. A. finished B. caught C. missed D. changed11. A. admire B. trust C. force D. mention12. A. touched B. shaped C. warned D. limited13. A. worse B. better C. less D. more14. A. research B. thought C. experience D. victory15. A. strict B. energetic C. helpful D. organized7In spring under the warm sun, a group of students are playing the accordion (手风琴). The music ___1___ like nature itself. They are the students in Shuangshiping Middle School in Shegang town in Hunan Province. And their music teacher is Guo Weixiang.67-year-old Guo is a musician who has the highest national qualification (资格) for the accordion. He ___2___ work in Hunan Provincial Opera and Dance Drama Theater. After retiring (退休) in 2014, he told a friend that he wanted to become a(n) ___3___ teacher. “Not all the children ___4___ playing an instrument. However, music has a great ___5___ on their life and study,” he said. His friend told him about Shuangshiping Middle School. Then Guo visited the school and ___6___ that most of the students there had never learnt to play the accordion.“The infrastructure(基础设施) at the school was poor, but it was ___7___ the place that I was looking for,” Guo said. “ ___8___ I am old, I still want to do something meaningful to society.” In 2014, he spent 30,000 yuan on 20 accordions. With ___9___ 10 bought by his friend and 10 more donated by a businessman, Guo drove for two hours to give lessons for free twice a month from his home in Changsha to the school 122 kilometres away.In addition to (除了) teaching students, he also gives lessons to ___10___ there. He hopes that they can teach students when he ___11___ come to the school. Now, the students also learn to play other ___12___ , such as the hulusi and guzheng. “Every time I come to teach them, I enjoy myself and I feel ___13___ again,” he said.“I don’t know how to thank Guo except by ___14___ our students and teachers to learn to play the instrument carefully. Now, 95 percent of our students are able to play an instrument. We will ___15___ to help more students achieve their music dreams,” said Xun Mengxiong, the teacher of Shuangshiping Middle School.1. A. looks B. sounds C. seems D. smells2. A. used to B. required to C. volunteer D. art3. A. maths B. Chinese C. volunteer D. art4. A. get used to B. have a gift for C. have difficulty in D. pay attention to5. A. chance B. value C. discussion D. influence6. A. discovered B. guessed C. wondered D. reminded7. A. hardly B. exactly C. correctly D. simply8. A. If B. Because C. Although D. Unless9. A. other B. another C. others D. more10. A. teachers B. parents C. nurses D. doctor11. A. needn’t B. must not C. has to D. is unable to12. A. games B. instruments C. toys D. sports13. A. curious B. young C. bored D. creative14. A. training B. letting C. encouraging D. suggesting15. A. forget B. devote C. refuse D. continue1-5 BDCAC 6-10 BAADB 11-15 DBACD1-5 CADBC 6-10 ABADB 11-15 CCDAD1-5 BCDDB 6-10 ABACD 11-15 ACBCD1-5 CABBD 6-10 BDABC 11-15 DADBD1-5 ADBCA 6-10 DBABC 11-15 BABDC1-5 ACBDC 6-10 BBAAD 11-15 BADCC1-5 BACBD 6-10 ABCBA 11-15 DBBCD。

外研版-英语-九上-外研版初三(上)期中复习题

外研版-英语-九上-外研版初三(上)期中复习题

外研版初三(上)期中复习题Ⅰ. 根据汉语或首字母提示以及句意,完成下列单词。

1. We will ______ (回复) your letter next week.2. We can learn from the ______ (实验) that oil and water don’t mix.3. He believes ______ (无论什么) she said to him.4. A good breakfast provides us enough ______ (能量) to study or work.5. We sat around the fire to keep ______ (我们自己) warm.6. For your own safety, please ______ (锁住) the door when you are alone at home.7. John went into his bedroom and ______ (关上) the door behind him.8. Believe me, he is a(n) ______ (诚实的) man.9. I’m sorry that I can’t join you in the ______ (讨论).10. One day you will ______ (意识到) how much your parents love you.11. Don’t play the music too l______. The baby is having a sleep.12. T here is a “No E______” sign here. So we can’t get in.13. Food is n______ for life. People would die without it.14. My bike is broken. I’m going to r______ it tomorrow.15. Don’t be so strict to your son. He’s just a k______.16. Mark sat b______ John and told him don’t worry.17. There isn’t a______ in the classroom. They are all on the playground.18. The poor boy was u______ to see after his eyes were hurt.19. About 10 people will a______ the meeting tomorrow.20. I will go a______ for a holiday with my family.Ⅱ. 用所给词的适当形式填空。

人教版英语九年级上册 Units 1-5 期中综合复习题(有答案)

人教版英语九年级上册 Units 1-5  期中综合复习题(有答案)

人教版英语九年级上册 Units 1-5 期中综合复习题一、单项选择(15分)1. —Can you tell me how to improve my spoken English? —Why not _________an English language club?A. joinB. take part inC. joininD. take part2. They decided___________to Hainan Island on vacation at last.A. goB. to goC. goingD. went3. You will fail the exam ___________you study hard from now on.A. untilB. ifC. as soon asD. unless4. We all love Mr.Wang because he regards us __________his own children.A. forB. asC. ofD. to5. —Can you remember this park? We _____ here.—Sure. But now I ______ in it.A. are used to take a walk, am used to swimB. are used to taking a walk, am used to swimmingC. used to take a walk, used to swimD. used to take a walk, am used to swimming6. —Which sweater do you prefer, the yellow one or the pink one?—____. I like a light blue one.A. EitherB. BothC. AnyD.Neither7. My hometown____________ a lot in the last past few years.A. changedB. is changingC. has changedD. is changed8. He’s a big boy now. Don’t _____________ him any more.A. worry aboutB. be afraid ofC. be terrified ofD. complain about9. There are hardly any new words in the story, __________?A. isn’t thereB. aren’t thereC. is thereD. are there10. The computeris too expensive for me to afford ________it.A. buyB. buyingC. boughtD. to buy11. He has been afraid of being along since his father _____________ five years ago.A. diedB. deadC. dyingD. death12. You are too careless. You should _______________ to your spelling.A. concentrateB. pay attentionC. be allowedD. look forward13. —12,500 kilometers is too long a journey!—Yes. _________the journey was long and hard, the Red Army (红军) pushed on.A. ThoughB. BecauseC. AsD. While14. —What rules do you have at home?—I have to _____my room every morning.A. pick upB. call upC. clean upD. turn up15. If I__________a lot of money, I would buy a new computer.A. haveB. hasC. hadD. is having二、完形填空(10分)“Where is the university (大学)?”This is a question that many visitors to Cambridge (剑桥) ask. But no one can give them a _____1_____ answer, for there is no wall to be found ____2____the university. The university is the city. You can find classroom buildings, _____3____, museums and offices of the university all over the city. And most of its members are the students and ____4______ of the thirty-one colleges (学院).Cambridge was already a _____5______ town long before the first students and teachers arrived 800 years ago. It grew up by the river Granta, and the river was once _____6______the Cam. A ____7____was built over the river as early as 875. So the town got its name “Cambridge”.In the fourteenth and fifteenth centuries more and more land was used for college buildings. The town grew much______8_____ in the nineteenth century after the opening of the railway in 1845.Cambridge became a ______9______ in 1951 and now it has a population of over 100,000. Many young students in other countries _____10______ to study at Cambridge. Thousands ofpeople from all over the world come to visit the university town. It has become a famous place around the world.()1. A. true B. clear C. right D. real()2. A. around B. in C. near D. by()3. A. cinemas B. parks C. zoos D. libraries()4. A. parents B. farmers C. workers D. teachers ()5. A. interesting B. usual C. developing D. common ()6. A. said B. called C. spoken D. talked()7. A. bridge B. building C. station D. house()8. A. smaller B. slower C. faster D. cleaner ()9. A. city B. college C. university D. country ()10. A. hope B. hate C. stop D. need三、阅读理解(40分)AJenny lived in a town. Her father Mr. Yang hada shop there and sold clothes in it. The shop keeper was born in a poor family and was at school no more than a year. He was always sorry for that though hehad much money now. He hoped his daughter could become a scientist. But thegirl didn’t like anything else except singing. She often went to concerts,bought a lot of records the famous pop stars made and insisted on listening to the music when she was free. Of course she wanted to be a pop star, too.Her parents wanted to stop her, but she didn’t listen to them and they had to agree to her choice. They engaged (聘用) an old man who was good at music as a private teacher.Five years passed, Mr. Yang bought all kinds of musical instruments for Jenny and they visited some places where the famous singers were born. Of course he spent a lot of money on it. But he found the girl didn’t make any progress. At last the teacher didn’t think the girl could become a singer at all and had to tell Mr. Yang about it. The man became angry and said, “Why didn’t you tell me about it earlier? My daughter learned nothing but I paid you month after month!”“I think you should thank me for it,”said the teacher. “Another teacher, who teaches badly, is paid more than I was. And I saved much money for you!”1. Mr. Yang was at school for a short time because _____________.A. his family was too poor to support himB. he has to help his parentsC. he was weak in his lessonsD. he didn’t like studying at all2. Jenny spent much money buying records and went to concerts in order to _________.A. visit some placesB. become a pop starC. learn singingD. B and C3. The underlined phrase “musical instruments”in the story means__________.A. 乐谱B. 乐器C. 乐章D. 乐队4. Mr. Yang became angry because ____________.A. he paid a lot of money to the girlB. his daughter decided to give up musicC. his daughter spent many years on musicD. the teacher taught his daughter nothing5. The teacher thought ___________.A. he had taught Jenny allB. the girl could be a singerC. he was paid less than his work matesD. it was wrong for Jenny to stop studying musicBLetterOneDear Editor,After I finish my homework, I often go online and chat with my friends. Sometimes I play internet games. But my parents hate to see me playing games on the computer. Maybe they have heard too much news about how QQ and Internet games harm children. Once I went to a net bar to play games after school. But after thatI told my parents that I was playing basketball at school. I said so because I didn’t want to make them unhappy. I feel bad about it. However, I need to rest for a while by playing computer games after studying for a long time. I really want my parents to understand that. Do foreign parents do the same to their children? Please help me.Li PingLetterTwoDear Li Ping,I think it’s not strange for parents to keep their children away from anything bad. Foreign parents will do the same as your parents! They may not let their children watch TV for too long a time, or like your parents, they don’t want their children to play computer games.Talk to your parents and be honest to them,I think tell them what you are doing and why you are doing so to make them understand you. It’s never good to do things behind your parents’backs.They aren’t fools as you think sometimes! Our parents seem to know what is the best for us. Remember: to be honest is the best way.Good luck,Rebecca6. From the passage,we can learn that Li Ping often ________.A. talks to his friends on the InternetB. plays basketball after schoolC. plays computer games at homeD. chats online before doing his homework7. The boy goes online ___________.A. to get news about QQB. just to have a restC. to show that he hates studyingD. just to find some friends8. According tothe passage, foreign parents ____________.A. let their children play computer gamesB. don’t allow their children to watch TVC. let their children watch TV for a long timeD. keep their children away from bad things like Chinese parents9. The underlined sentence in Letter Two means____________A. You must do everything in front of your parentsB. You must always listen to your parents carefullyC. You should tell your parents what you do before or after doing itD. You should not do anything to make your parents worry about you10. The editor thinks _____________.A. children should play computer games secretlyB. playing computer games can be very helpful to children’s studiesC. children should be honest and try to make their parents understand themD. foreign parents don’t care for their children as much as Chinese parentsCHave you ever met anyone of your age from America? Do you think you would have a lot in common with middle school students there?With only one look, you can see lots of differences. For example, classes in American schools are smaller than yours. Most classes have no more than 30 students. Most students in the USA don’t wear school uniforms. And they don’t have group exercises each day as the way you do.If they saw your exercises, they would think you were very strange!clothes,“Need a ride?”he asked. My plane was ____6_____ in an hour so I didn’t think_____7_____. I took my bags, climbed carefully onto the motorcycle and shouted,“To the airport please!”It was my first time on a motorcycle so I was badly ____8_____. The young man drove so fast that I kept my ___9____ shut all the way. Suddenly, the motorcycle came to a stop. “Here we are, sir!”he said. I looked at my watch and there were only ten minutes left.I was just in time for my _____10_____. The young man wished me a nice trip, and then quickly drove away.五、补全对话(10分)根据下面的对话情景,在每个空白处填上一个适当的句子,使对话的意义连贯、完整。

2014—2015学年山东省费县梁邱镇第一初级中学九年级数学上期中复习题(一)【新课标人教版】

2014—2015学年山东省费县梁邱镇第一初级中学九年级数学上期中复习题(一)【新课标人教版】

期中复习题 一一、选择题1.如果代数式x 2+4x+4的值是16,则x 的值一定是( )A .-2B .32,32-C .2,-6D .30,-342.若c (c ≠0)为关于x 的一元二次方程x 2+bx+c=0的根,则c+b 的值为( )A .1B .-1C .2D .-23.方程x 2+3x-6=0与x 2-6x+3=0所有根的乘积等于( )A .-18B .18C .-3D .34.利用墙的一边,再用13m 的铁丝网,围成一个面积为202m 的长方形场地,求这个长方形场地的两边长,设墙的对边长为xm ,可列方程为( ) A .(13)20x x -= B .13202x x -∙= C.1(13)202x x -= D.132202x x -∙=5.如图所示,△ABC 中,AC=5,中线AD=7,△EDC 是由△ADB 旋转1800所得,则AB 边的取值范围是 .( )A.1<AB <29B.4<AB <24C.5<AB <19D.9<AB <196.一个小组有若干人,新年互送贺年卡,已知全组共送出72张,则这个小组有 ( )A.12人B.18人C.9人D.10人7.如图所示,在直角三角形ABC 中,∠C =90°,AC =6,BC =8,将△ABC 绕点B 旋转90°,得到关于点A 的对称点D ,则AD 的长是 .( ) A.20 B.10 C.102 D.2028.如图,在正方形ABCD 中,E 为DC 边上的点,连结BE ,将△BCE 绕点C 顺时针方向旋转900得到△DCF ,连结EF ,若∠BEC=600,则∠EFD 的度数为( )A.100B.150C.200D.2509.如图,C 是线段BD 上一点,分别以BC 、CD 为边在BD 同侧作等边△ABC 和等边△CDE,AD 交CE 于F ,BE 交AC 于G ,则图中可通过旋转而相互得到的三角形对数有( ).A.1对B.2对C.3对D.4对10.如图,O 是锐角三角形ABC 内一点,∠AOB=∠BOC=∠COA=120°,P 是△ABC 内不同于O 的另一点;△A ′BO ′、△A ′BP ′分别由△AOB 、△APB 旋转而得,旋转角都为60°,则下列结论中正确的有( ). ①△O ′BO 为等边三角形,且A ′、O ′、O 、C 在一条直线上.②A ′O ′+O ′O =AO +BO .③A ′P ′+P ′P =PA +PB .④PA +PB +PC>AO +BO +CO .A .1个B .2个C .3个D .4个二、填空题11.如图,设P 是等边三角形ABC 内任意一点,△ACP ′是由△ABP 旋转得到的,则PA_______PB +PC(填“>”、“<”或“=”).12.已知a 、b 是方程2250x x +-=的两个实数根,则22a ab a ++的值为________13.P 是等边三角形ABC 内一点,将△ABP 绕点B 顺时针方向旋转60°,得到△CBP ′,若PB=3,则PP ′=14.如图,以△ABC 中AB 、AC 为边分别作正方形ADEB 与ACGF ,连接DC 、BF 。

2022-2023学年上海九年级上学期期中【夯实基础60题考点专练】(沪教版)(解析版)

2022-2023学年上海九年级上学期期中【夯实基础60题考点专练】(沪教版)(解析版)

上海九年级上学期期中【夯实基础60题考点专练】一.三角形的重心(共4小题)1.(2021秋•宝山区期中)如图,已知△ABC的中线AD、CE相交于点G,过点E作EF∥BC交AD于点F,那么的值为.【分析】根据重心的性质得到AG=2DG,BG=2GE,根据平行线分线段成比例定理计算即可.【解答】解:∵△ABC的两条中线AD和CE相交于点G,∴点G是△ABC的重心,∴AG=2DG,CG=2GE,∵EF∥BC,∴==,∴=,故答案为:.【点评】本题考查的是三角形的重心的概念和性质、平行线分线段成比例定理的应用,三角形的重心是三角形三条中线的交点,且重心到顶点的距离是它到对边中点的距离的2倍.2.(2021秋•浦东新区期中)在△ABC中,中线AD和中线CE相交于点O,那么AD:AO=3:2.【分析】直接根据三角形重心的性质解答即可.【解答】解:∵在△ABC中,中线AD和中线CE相交于O,∴点O是△ABC的重心,∵AO=AD,∴AD:AO=3:2.故答案为:3:2.【点评】本题考查的是三角形的重心,熟知重心到顶点的距离与重心到对边中点的距离之比为2:1是解答此题的关键.3.(2021秋•杨浦区期中)如图,已知AD是△ABC的中线,G是△ABC的重心,联结BG并延长交边AC 于点E,联结DE,那么S△ABC:S△GED的值为12.【分析】根据三角形重心的性质得到BE为△ABC的中线,BG=2GE,再利用三角形面积公式得到S△BDE =3S△GED,接着利用D点为BC的中点得到S△BCE=6S△GED,然后利用E点为AC的中点得到S△ABC=12S.△GED【解答】解:∵AD是△ABC的中线,G是△ABC的重心,∴BE为△ABC的中线,BG=2GE,∴S△BDG=2S△GED,∴S△BDE=3S△GED,∵D点为BC的中点,∴S△BCE=2S△BDE=6S△GED,∵E点为AC的中点,∴S△ABC=2S△BCE=12S△GED,即S△ABC:S△GED=12.故答案为:12.【点评】本题考查了三角形的重心:三角形的重心是三角形三边中线的交点;重心到顶点的距离与重心到对边中点的距离之比为2:1.也考查了三角形面积公式.4.(2021秋•奉贤区校级期中)已知直角三角形两直角边长分别为6cm和8cm,则三角形的重心到斜边的距离是cm.【分析】在Rt△ACB中,∠ACB=90°,AC=8cm,BC=6cm,CD为AB边上的中线,G点为△ABC的重心,利用勾股定理计算出AB=10cm,再根据三角形重心的性质得到CD=3DG,作GF⊥AB于F点,CE⊥AB于E点,如图,利用面积法求出CE=cm,然后根据平行线分线段成比例定理求出GF即可.【解答】解:在Rt△ACB中,∠ACB=90°,AC=8cm,BC=6cm,CD为AB边上的中线,G点为△ABC 的重心,∴AB==10(cm),∴CD=AB=5cm,∵G点为△ABC的重心,∴CG=2GD,∴CD=3DG,作GF⊥AB于F点,CE⊥AB于E点,如图,∵CE•AB=AC•BC,∴CE==(cm),∵GF∥CE,∴==,∴GF=CE=×=(cm),即三角形的重心到斜边的距离是cm.故答案为:cm.【点评】本题考查了三角形的重心:三角形的重心是三角形三边中线的交点.重心到顶点的距离与重心到对边中点的距离之比为2:1.也考查了勾股定理和相似三角形的判定与性质.二.*平面向量(共6小题)5.(2021秋•松江区校级期中)已知、为非零向量,下列判断错误的是()A.如果=3,那么∥B.=,那么=或=C.的方向不确定,大小为0D.如果为单位向量且=﹣2,那么=2【分析】根据平面向量的性质解答.【解答】解:A、如果=3,那么两向量是共线向量,则∥,故本选项不符合题意.B、如果=,只能判定两个向量的模相等,无法判定方向,故本选项符合题意.C、的方向不确定,大小为0,故本选项不符合题意.D、根据向量模的定义知,=2||=2,故本选项不符合题意.故选:B.【点评】本题考查了平面向量,注意,平面向量既有大小,又有方向.6.(2021秋•静安区校级期中)如果向量与单位向量的方向相反,且长度为3,那么用向量表示向量为()A.=3B.=﹣3C.=3D.=﹣3【分析】根据平面向量的定义即可解决问题.【解答】解:∵向量为单位向量,向量与向量方向相反,∴=﹣3.故选:B.【点评】本题考查平面向量的性质,解题的关键是灵活运用所学知识解决问题,属于中考基础题.7.(2021秋•奉贤区校级期中)已知、是两个单位向量,向量,,那么下列结论中正确的是()A.B.C.D.【分析】由、是两个单位向量的方向不确定,从而判定A与B错误;又由平面向量模的知识,即可判定选项C正确,选项D错误.【解答】解:A、∵、是两个单位向量的方向不确定,∴不一定等于,故本选项错误;B、∵、是两个单位向量的方向不确定,∴不一定等于,故本选项错误;C、∵||=|2|=2,||=|﹣2|=2,∴||=||,故本选项正确;D、∵||=|2|=2,||=|﹣2|=2,∴||=||,故本选项错误.故选:C.【点评】此题考查了平面向量的知识.注意平面向量的模的求解方法与向量是有方向性的.8.(2021秋•闵行区校级期中)已知点D、E分别在△ABC的边CA、BA的延长线上,DE∥BC,若DE:BC=1:3,则向量等于()A.B.C.D.【分析】根据相似三角形的性质,求出与的模的比,进而得出两向量的比值.【解答】解:如图所示:∵DE∥BC,DE:BC=1:3,∴△DAE∽△CAB,∴||:||=1:3.故选:D.【点评】此题考查了平面向量,利用相似三角形的性质求出向量的模的比是解题的关键.9.(2021秋•宝山区期中)化简:﹣(﹣2)+3(2﹣)=5﹣.【分析】先去括号,然后合并同类项.【解答】解:﹣(﹣2)+3(2﹣)=﹣+2+6﹣3=5﹣.故答案是:5﹣.【点评】本题主要考查了平面向量,实数的运算法则或定律同样能应用于平面向量的计算过程中.10.(2021秋•闵行区期中)如图,已知两个不平行的向量、.先化简,再求作:﹣﹣(﹣4).(不要求写作法,但要指出图中表示结论的向量)【分析】根据平面向量的加法法则计算即可,利用三角形法则画出图形即可.【解答】解:﹣﹣(﹣4)=﹣﹣+2=2+.如图,即为所求.【点评】本题考查平面向量,平面向量的加法法则,三角形法则等知识,解题的关键是熟练掌握平面向量的加法法则,三角形法则,属于中考常考题型.三.比例的性质(共6小题)11.(2021秋•奉贤区校级期中)如果2x=3y(x、y均不为0),那么下列各式中正确的是()A.=B.=3C.=D.=【分析】根据比例的性质逐项判断,判断出各式中正确的是哪个即可.【解答】解:∵2x=3y,∴=,∴选项A不正确;∵2x=3y,∴=,∴==3,∴选项B正确;∵2x=3y,∴=,∴==,∴选项C不正确;∵2x=3y,∴=,∴==,∴选项D不正确.故选:B.【点评】此题主要考查了比例的性质和应用,要熟练掌握.12.(2021秋•徐汇区校级期中)如果x:y=1:2,那么下列各式中不成立的是()A.B.C.D.【分析】根据比例式的性质得出x,y的关系,分别代入四个选项即可得出答案,也可用特殊值法求出.【解答】解:∵x:y=1:2,∴=,A.==,故本选项正确;B,=1﹣=1﹣=,故本选项正确;C,===,故本选项正确;D,当x=2,y=4时,==,故此选项错误,故选:D.【点评】此题主要考查了比例式的性质,利用特殊值法进行排除更为简单,也是数学中的重要思想.13.(2021秋•奉贤区校级期中)若,则=.【分析】直接利用已知将原式变形得出2x=5y,进而得出答案.【解答】解:∵,∴3x=5x﹣5y,故2x=5y,则=.故答案为:.【点评】此题主要考查了比例的性质,正确将已知变形是解题关键.14.(2021秋•黄浦区期中)已知实数x、y满足,则=2.【分析】先用y表示出x,然后代入比例式进行计算即可得解.【解答】解:∵=,∴x=y,∴==2.故答案为:2.【点评】本题考查了比例的性质,根据两内项之积等于两外项之积用y表示出x是解题的关键.15.(2021秋•奉贤区校级期中)已知:a:b:c=3:4:5.(1)求代数式的值;(2)如果3a﹣b+c=10,求a、b、c的值.【分析】设a=3k,b=4k,c=5k,(1)把a=3k,b=4k,c=5k代入代数式中进行分式的混合运算即可;(2)把a=3k,b=4k,c=5k代入3a﹣b+c=10得到关于k的方程,求出k,从而得到a、b、c的值.【解答】解:∵a:b:c=3:4:5,∴设a=3k,b=4k,c=5k,(1)==;(2)∵3a﹣b+c=10,∴9k﹣4k+5k=10,解得k=1,∴a=3,b=4,c=5.【点评】本题考查了比例的性质:熟练掌握比例的基本性质(内项之积等于外项之积、合比性质、分比性质、合分比性质、等比性质等)是解决问题的关键.16.(2021秋•奉贤区校级期中)已知实数x、y、z满足==,且x﹣2y+3z=﹣2.求:的值.【分析】设===k(k≠0),得出x=3k,y=5k,z=2k,再根据x﹣2y+3z=﹣2,求出k的值,从而得出x、y、z的值,然后代入要求的式子进行计算即可得出答案.【解答】解:∵==,设===k(k≠0),∴x=3k,y=5k,z=2k,∵x﹣2y+3z=﹣2,∴3k﹣10k+6k=﹣2,∴k=2,∴x=6,y=10,z=4,∴==2.【点评】本题考查了比例的性质:熟练掌握比例的基本性质(内项之积等于外项之积、合比性质、分比性质、合分比性质、等比性质等)是解决问题的关键.四.比例线段(共4小题)17.(2021秋•浦东新区期中)甲、乙两地的实际距离是40千米,在比例尺为1:500000的地图上,甲乙两地的距离是()A.0.8cm B.8cm C.80cm D.800cm【分析】根据实际距离×比例尺=图上距离,代入数据计算即可.【解答】解:40千米=4000000厘米,4000000×=8(cm).故选:B.【点评】本题考查了比例线段,能够根据比例尺灵活计算,注意单位的换算问题.18.(2021秋•杨浦区期中)已知线段a=2cm,c=8cm,则线段a、c的比例中项是4cm.【分析】根据比例中项的定义,列出比例式即可求解.【解答】解:设线段b是a、c的比例中项,∵线段a=2cm,c=8cm,∴b2=ac=2×8=16,∴b1=4,b2=﹣4(舍去).故答案为:4.【点评】此题考查了比例线段;理解比例中项的概念,这里注意线段不能是负数.19.(2021秋•徐汇区校级期中)已知线段b是线段a、c的比例中项,且a=12,c=3,那么b=6.【分析】直接利用比例中项的定义分析得出答案.【解答】解:∵线段b是线段a、c的比例中项,∴b2=ac,∵a=12,c=3,∴b2=36,∴b=6.故答案为:6.【点评】此题主要考查了比例线段,正确把握比例中项的定义是解题关键.20.(2021秋•奉贤区校级期中)已知:线段a、b、c,且.(1)求的值;(2)如线段a、b、c满足3a﹣4b+5c=54,求a﹣2b+c的值.【分析】(1)设===k,则a=3k,b=4k,c=5k,代入所求代数式即可;(2)把a=3k,b=4k,c=5k代入3a﹣4b+5c=54求出k,把k值代入所求代数式即可.【解答】解:设===k,则a=3k,b=4k,c=5k,(1)===;(2)∵3a﹣4b+5c=54,∴9k﹣16k+25k=54,解得:k=3,∴a﹣2b+c=3k﹣8k+5k=0.【点评】本题主要考查了比例线段,设===k得到a=3k,b=4k,c=5k是解决问题的关键.五.黄金分割(共4小题)21.(2021秋•静安区校级期中)校园里一片小小的树叶,也蕴含着“黄金分割”,如图,P为AB的黄金分割点(AP>PB),如果AB的长度为10cm,那么AP的长度为()cm.A.﹣1B.2﹣2C.5﹣5D.10﹣10【分析】直接利用黄金分割的定义计算出AP的长即可.【解答】解:∵P为AB的黄金分割点(AP>PB),AB=10cm,∴AP=AB=×10=5﹣5(cm),故选:C.【点评】此题考查了黄金分割:把线段AB分成两条线段AC和BC(AC>BC),且使AC是AB和BC的比例中项(即AB:AC=AC:BC),叫做把线段AB黄金分割,点C叫做线段AB的黄金分割点.22.(2021秋•金山区校级期中)已知点P是线段AB的黄金分割点,AB=4厘米,则较短线段AP的长是6﹣2厘米.【分析】根据黄金比是计算.【解答】解:∵点P是线段AB的黄金分割点,∴较长线段BP=×4=2﹣2(厘米),∴较短线段AP=4﹣(2﹣2)=6﹣2(厘米),故答案为:6﹣2.【点评】本题考查的是黄金分割,掌握黄金分割的概念,黄金比是是解题的关键.23.(2021秋•浦东新区校级期中)已知线段AB=2,P是线段AB的黄金分割点(AP<PB),那么PB=﹣1.【分析】直接根据黄金分割的定义求出PB的长即可.【解答】解:∵点P是线段AB的黄金分割点,AP<PB,AB=2,∴PB=AB=﹣1,故答案为:﹣1.【点评】本题考查了黄金分割的定义,熟练掌握黄金分割的定义及黄金比值是解题的关键.24.(2021秋•浦东新区期中)已知点P是线段AB上的黄金分割点,AP>PB,线段AB=2厘米,那么线段AP=(﹣1)厘米.【分析】根据黄金分割点的定义,知AP是较长线段,则AP=AB,代入数据即可得出AP的长.【解答】解:∵点P是线段AB上的黄金分割点,AP>PB,线段AB=2厘米,∴AP=AB=(﹣1)厘米,故答案为:(﹣1)厘米.【点评】本题考查了黄金分割的概念.解题的关键是熟记黄金分割的公式:较长的线段=原线段的倍.六.平行线分线段成比例(共7小题)25.(2021秋•长宁区校级期中)如图,下列各比例式不一定能推得DE∥BC的是()A.B.C.D.【分析】根据对应线段成比例,两直线平行,可得出答案.【解答】解:A、=,可证明DE∥BC,不符合题意;B、=,可证明DE∥BC,不符合题意;C、=,可证明DE∥BC,不符合题意;D、=,不一定能推得DE∥BC,符合题意.故选:D.【点评】本题考查了平行线分线段成比例,对应线段成比例,两直线平行.26.(2021秋•杨浦区期中)在△ABC中,点D、E分别在AB、AC上,如果AD=2,BD=3,那么由下列条件能够判定DE∥BC的是()A.=B.=C.=D.=【分析】根据平行线分线段成比例定理的逆定理,当=或=时,DE∥BD,然后可对各选项进行判断.【解答】解:当=或=时,DE∥BD,即=或=.故选:D.【点评】本题考查了平行线分线段成比例定理:三条平行线截两条直线,所得的对应线段成比例.也考查了平行线分线段成比例定理的逆定理.27.(2021秋•静安区校级期中)在△ABC中,点D、E分别在AB、AC的延长线上,下列不能判定DE∥BC 的条件是()A.EA:AC=DA:AB B.DE:BC=DA:ABC.EA:EC=DA:DB D.AC:EC=AB:DB【分析】根据平行线分线段成比例定理对各个选项进行判断即可.【解答】解:A.∵EA:AC=AD:AB,∴DE∥BC,选项A能判定DE∥BC;B.由DE:BC=DA:AB,不能得到DE∥BC,选项B不能判定DE∥BC;C.∵EA:EC=DA:DB,∴DE∥BC,选项C能判定DE∥BC;D.∵AC:EC=AB:DB,∴DE∥BC,选项D能判定DE∥BC.故选:B.【点评】本题考查平行线分线段成比例定理,如果一条直线截三角形的两边(或两边的延长线)所得的对应线段成比例,那么这条直线平行于三角形的第三边.28.(2021秋•黄浦区期中)在△ABC中,点D、E分别在边AB、AC上,如果AD=2,BD=4,那么由下列条件能够判断DE∥BC的是()A.B.C.D.【分析】先求出比例式,再根据相似三角形的判定得出△ADE∽△ABC,根据相似推出∠ADE=∠B,根据平行线的判定得出即可.【解答】解:只有选项C正确,理由是:∵AD=2,BD=4,=,∴==,∵∠DAE=∠BAC,∴△ADE∽△ABC,∴∠ADE=∠B,∴DE∥BC,根据选项A、B、D的条件都不能推出DE∥BC,故选:C.【点评】本题考查了平行线分线段成比例定理,相似三角形的性质和判定的应用,能灵活运用定理进行推理是解此题的关键.29.(2021秋•浦东新区期中)在△ABC中,点D、E分别是边AB、AC上的点,且有==,BC=18,那么DE的值为()A.3B.6C.9D.12【分析】首先根据题意画出图形,由==,易证得△ADE∽△ABC,然后由相似三角形的对应边成比例,求得答案.【解答】解:如图,∵==,∴=,∵∠A=∠A,∴△ADE∽△ABC,∴,∵BC=18,∴DE=6.故选:B.【点评】此题考查了相似三角形的判定与性质.注意根据题意画出图形,结合图形求解是关键.30.(2021秋•浦东新区期中)在△ABC,点D、E分别在边AB、AC上,如果AD=1,BD=2,那么由下列条件能够判定DE∥BC的是()A.B.C.D.【分析】根据相似三角形的判定得出△ADE∽△ABC即可推出∠ADE=∠B,根据平行线的判定推出即可.【解答】解:∵AD=1,BD=2,∴=,只有当=时,DE∥BC,理由是:∵==,∠A=∠A,∴△ADE≌△ABC,∴∠ADE=∠B,∴DE∥BC,而其它选项都不能推出△ADE∽△ABC,即不能推出∠ADE=∠B或∠AED=∠C,即不能推出DE∥BC,即选项A、B、C都错误,只有选项D正确;故选:D.【点评】本题考查了相似三角形的性质和判定,平行线的判定的应用,主要考查学生的推理能力.31.(2021秋•徐汇区校级期中)如图,点D是BC中点,AM=MD,BM的延长线交AC于点N,求AN:NC的值.【分析】作DE∥BN交AC于E,根据平行线分线段成比例定理得到N是AE的中点,E是NC的中点,得到答案.【解答】解:作DE∥BN交AC于E,∵DE∥BN,M是AD的中点,∴N是AE的中点,∵DE∥BN,D是BC的中点,∴E是NC的中点,∴AN:NC=,故答案为:.【点评】本题考查的是平行线分线段成比例定理,灵活运用定理、找准对应关系是解题的关键.七.相似图形(共1小题)32.(2021秋•浦东新区期中)用一个4倍放大镜照△ABC,下列说法错误的是()A.△ABC放大后,∠B是原来的4倍B.△ABC放大后,边AB是原来的4倍C.△ABC放大后,周长是原来的4倍D.△ABC放大后,面积是原来的16倍【分析】用2倍的放大镜放大一个△ABC,得到一个与原三角形相似的三角形;根据相似三角形的性质:相似三角形的面积比等于相似比的平方,周长比等于相似比.可知:放大后三角形的面积是原来的16倍,边长和周长是原来的4倍,而内角的度数不会改变.【解答】解:∵放大前后的三角形相似,∴放大后三角形的内角度数不变,面积为原来的16倍,周长和边长均为原来的4倍,则A错误,符合题意.故选:A.【点评】本题考查了对相似三角形性质的理解.(1)相似三角形周长的比等于相似比;(2)相似三角形面积的比等于相似比的平方;(3)相似三角形对应高的比、对应中线的比、对应角平分线的比都等于相似比.八.相似三角形的性质(共1小题)33.(2021秋•金山区校级期中)如图,点D、E分别在△ABC的两边BA、CA的延长线上,下列条件能判定ED∥BC的是()A.B.C.AD•AB=DE•BC D.AD•AC=AB•AE【分析】根据平行线分线段成比例定理、平行线的判定定理判断即可.【解答】解:∵∠EAD=∠CAB,∴当,即AD•AC=AB•AE,∴ED∥BC,故选:D.【点评】本题考查的是平行线分线段成比例定理、平行线的判定定理,掌握相关的判定定理是解题的关键.九.相似三角形的判定(共2小题)34.(2021秋•闵行区校级期中)如图,分别以下列选项作为一个已知条件,其中不一定能得到△AOB与△COD相似的是()A.∠BAC=∠BDC B.∠ABD=∠ACD C.D.【分析】相似三角形的判定有三种方法,①三边法:三组对应边的比相等的两个三角形相似;②两边及其夹角法:两组对应边的比相等且夹角对应相等的两个三角形相似;③两角法:有两组角对应相等的两个三角形相似,结合选项所给条件进行判断即可.【解答】解:A、若∠BAC=∠BDC,结合∠AOB=∠COD,可得△AOB∽△DOC,故本选项错误;B、若∠ABD=∠ACD,结合∠AOB=∠COD,可得△AOB∽△DOC,故本选项错误;C、若=,因为只知道∠AOB=∠COD,不符合两边及其夹角的判定,不一定能得到△AOB∽△DOC,故本选项正确.D、若=,结合∠AOB=∠COD,根据两边及其夹角的方法可得△AOB∽△DOC,故本选项错误;故选:C.【点评】本题考查了相似三角形的判定,解答本题的关键是熟练掌握相似三角形判定的三种方法.35.(2021秋•长宁区校级期中)如图,在△ABC中,AB=6,AC=8,D、E分别在AB、AC上,BD=2,CE=5.求证:△AED∽△ABC.【分析】根据两边成比例夹角相等即可证明.【解答】证明:∵AB=6,BD=2,∴AD=4,∵AC=8,CE=5,∴AE=3,∴,,∴,∵∠EAD=∠BAC,∴△AED∽△ABC.【点评】本题考查相似三角形的判定,解题的关键是熟练掌握相似三角形的判断方法.一十.相似三角形的判定与性质(共17小题)36.(2021秋•长宁区校级期中)如图,在平行四边形ABCD中,点E在边DC上,连接AE并延长交BC的延长线于点F,若AD=3CF,那么下列结论中正确的是()A.FC:FB=1:3B.CE:CD=1:3C.CE:AB=1:4D.AE:AF=1:2.【分析】由四边形ABCD是平行四边形得AD∥BC,证△ECF∽△ADE,进而判断即可.【解答】解:∵在平行四边形ABCD中,∴AD∥BC,∴△ECF∽△ADE,∵AD=3CF,A、FC:FB=1:4,错误;B、CE:CD=1:4,错误;C、CE:AB=1:4,正确;D、AE:AF=3:4.错误;故选:C.【点评】本题主要考查相似三角形的判定与性质及平行四边形的性质,熟练掌握相似三角形的判定和性质是解题的关键.37.(2021秋•金山区校级期中)秦九韶的《数书九章》中有一个“峻积验雪”的例子,其原理为:如图,在Rt△ABC中,∠C=90°,AC=12,BC=5,AD⊥AB,AD=0.4,过点D作DE∥AB交CB的延长线于点E,过点B作BF⊥CE交DE于点F,那么BF=.【分析】作CH⊥AB,BG⊥DE于点H,G,根据已知条件证明四边形ADGB是矩形,再根据等面积法求出CH,证明△FBE∽△ACB,利用对应高的比等于相似比即可求出BF的长.【解答】解:如图,作CH⊥AB,BG⊥DE于点H,G,∵DE∥AB,∴BG⊥AB,∵AD⊥AB,∴∠DAB=∠ABG=∠BGD=90°,∴四边形ADGB是矩形,∴BG=AD=0.4,在Rt△ABC中,∠C=90°,AC=12,BC=5,∴AB===13,∵S△ABC=BC•AC=AB•CH,∴CH===,∵DE∥AB,∴∠E=∠ABC,∵∠FBE=∠ACB=90°,∴△FBE∽△ACB,∵CH⊥AB,BG⊥DE,∴=,∴=,∴BF=.故答案为:.【点评】本题考查了相似三角形的判定与性质,矩形的判定与性质,等面积法,解决本题的关键是综合运用以上知识.38.(2021秋•奉贤区校级期中)如图,梯形BCDE中,DE∥BC,CD、BE的延长线交于点A,联结BD、CE相交于点O,已知AE=3,EB=6,DE=2.(1)求线段BC的长;(2)若S△DOB=1,求S△CEB=?【分析】(1)由平行线分线段成比例定理得出比例式,即可求出BC的长.(2)由平行线得出△ODE∽△OBC,得出=,=,求出S△CEB:S△BOC=4:3,S△OBC=9,即可得出S△CEB=12.【解答】解:(1)∵AE=3,EB=6,∴AB=9,∵DE∥BC,∴=,∴BC=3DE=6;(2)∵DE∥BC,∴△ODE∽△OBC,∴=,=()2=,∴S△CEB:S△BOC=4:3,S△OBC=9×1=9,∴S△CEB=×9=12.【点评】本题考查了相似三角形的判定和性质、平行线分线段成比例定理、三角形的面积关系.熟练掌握平行线分线段成比例定理,证明三角形相似是解决问题的关键.39.(2021秋•静安区校级期中)如图,在△ABC中,点D是边AB的垂直平分线与边BC的交点,点E在边AB上,∠CAD=∠BDE.(1)求证:△ABC∽△EAD;(2)如果AD=x,AE=2x﹣9,CD=3,BE=2,求AD的长.【分析】(1)根据线段垂直平分线的性质可得AD=BD,则∠B=∠DAB,根据三角形外角的性质得∠AED =∠B+∠BDE,由∠CAD=∠BDE即可得∠AED=∠BAC,即可得出结论;(2)由AD=x,CD=3,AD=BD,可得BC=BD+CD=x+3,由AE=2x﹣9,BE=2,可得AB=AE+BE=2x﹣9+2=2x﹣7,根据相似三角形的性质即可得AD的长.【解答】(1)证明:∵点D是边AB的垂直平分线与边BC的交点,∴AD=BD,∴∠B=∠DAB,∵∠AED=∠B+∠BDE,∠CAD=∠BDE,∴∠AED=∠DAB+CAD=∠BAC,∴△ABC∽△EAD;(2)解:∵AD=x,CD=3,AD=BD,∴BC=BD+CD=x+3,∵AE=2x﹣9,BE=2,∴AB=AE+BE=2x﹣9+2=2x﹣7,∵△ABC∽△EAD,∴,∴,解得:x=,∴AD=.【点评】本题考查了相似三角形的性质和判定、线段垂直平分线的性质,解决问题的关键熟练掌握相似三角形的判定和性质定理.40.(2021秋•奉贤区校级期中)如图,矩形DEFG的边EF在△ABC的边BC上,顶点D、G分别在边AB、AC上,已知△ABC的边BC长60厘米,高AH为40厘米,矩形DEFG相邻两边DE:EF=2:3.求矩形DEFG的边DE、EF的长.【分析】先证明△ADG∽△ABC,再利用相似三角形的性质可求解.【解答】解:∵四边形DEFG是矩形,∴DG∥BC,DG=BC,∵DE:EF=2:3,∴设DE=2xcm,DG=EF=3xcm,∵DE∥BC,∴△ADG∽△ABC,∴=,∴x=10,∴DE=20cm,EF=30cm.【点评】本题考查了相似三角形的判定和性质,矩形的性质,证明三角形相似是解题的关键.41.(2021秋•浦东新区校级期中)如图,已知,在锐角△ABC中,BD和CE分别是边AC、AB上的高.(1)求证:AE•FB=FE•AC;(2)联结AF,求证:AF•BE=BC•EF.【分析】(1)通过证明△AEC∽△FEB,可得,可得结论;(2)通过证明△AEF∽△CEB,可得,可得结论.【解答】证明:(1)∵BD和CE分别是边AC、AB上的高,∴∠AEC=∠BDA=90°,∴∠A+∠ACE=90°=∠A+∠ABD,∴∠ACE=∠ABD,又∵∠AEC=∠BEF=90°,∴△AEC∽△FEB,∴,∴AE•FB=EF•AC;(2)如图,连接AF,∵△AEC∽△FEB,∴,∴,又∵∠AEC=∠FEB=90°,∴△AEF∽△CEB,∴,∴AF•BE=BC•EF.【点评】本题考查了相似三角形的判定和性质,掌握相似三角形的判定方法是解题的关键.42.(2021秋•闵行区校级期中)如图,在△ABC中,D、E分别在边BC、AC上,AD、BE交于F,AF=AE且AF•BE=BF•CE.(1)求证:△ABD∽△CBA;(2)求证:AF为DF与CE的比例中项.【分析】(1)先证△F AB∽△EBC得∠BAF=∠C即可;(2)通过两个角相等,证明△BDF∽△BAE,得,又,则,即可解决问题.【解答】证明:(1)∵AF•BE=BF•CE,∴,又∵AF=AE,∴∠AFE=∠AEF,∴∠AFB=∠CEB,∴△F AB∽△ECB,∴∠BAF=∠C,又∵∠ABC=∠ABD,∴△ABD∽△CBA;(2)∵△F AB∽△ECB,∴∠ABF=∠EBC,∵△ABD∽△CBA,∴∠BDF=∠BAF,∴△BDF∽△BAE,∴,∵,∴,又∵AF=AE,∴,∴AF²=DF•CE,∴AF为DF与CE的比例中项.【点评】本题主要考查了相似三角形的判定与性质,熟练掌握相似三角形的判定与性质是解题的关键.43.(2021秋•长宁区校级期中)如图,在△ABC中,点D,E分别在AB,AC上,ED∥BC,CD与BE相交于点F,AE=3,DF=2,CF=5.(1)求的值;(2)求EC的长.【分析】(1)由△DFE∽△CFB,得,代入即可;(2)由△ADE∽△ABC,得,代入求出AC的长即可解决问题.【解答】解:(1)∵ED∥BC,∴∠FDE=∠FCB,∠FED=∠FBC,∴△DFE∽△CFB,∴,即;(2)∵ED∥BC,∴∠ADE=∠ABC,∠AED=∠ACB,∴△ADE∽△ABC,∴,即,∴AC=,∴EC=AC﹣AE==.【点评】本题主要考查了平行线的性质,相似三角形的判定与性质等知识,由平行得出三角形相似是解题的关键.44.(2021秋•金山区校级期中)如图,在△ABC中,点P、D分别在边BC、AC上,P A⊥AB,垂足为点A,DP⊥BC,垂足为点P,=.(1)求证:∠APD=∠C;(2)如果AB=6,DC=4,求AP的长.【分析】(1)通过证明Rt△ABP∽Rt△PCD,可得∠B=∠C,∠APB=∠CDP,由外角性质可得结论;(2)通过证明△APC∽△ADP,可得=,即可求解.【解答】(1)证明:∵P A⊥AB,DP⊥BC,∴∠BAP=∠DPC=90°,∵=,∴,∴Rt△ABP∽Rt△PCD,∴∠B=∠C,∠APB=∠CDP,∵∠DPB=∠C+∠CDP=∠APB+∠APD,∴∠APD=∠C;(2)解:∵∠B=∠C,∴AB=AC=6,∵CD=4,∴AD=2,∵∠APD=∠C,∠CAP=∠P AD,∴△APC∽△ADP,∴,∴AP2=2×6=12,∴AP=2.【点评】本题考查了相似三角形的判定和性质,等腰三角形的性质,解题的关键是正确寻找相似三角形解决问题,属于中考常考题型.45.(2021秋•金山区校级期中)如图,点P是正方形ABCD的对角线BD上一点.(1)联结CP并延长,交AD于点E,交BA的延长线于点F.求证:PC2=PE•PF;(2)若AB2=BD•DP,求证:∠BPC=90°.【分析】(1)由正方形的性质得出DC∥AB,BC∥AD,证明△DCP∽△BFP,△DEP∽△BCP,由相似三角形的性质得出,,则可得出结论;(2)证明△CDP∽△BDC,由相似三角形的性质得出∠DCP=∠DBC,证出∠DPC=90°,则可得出结论.【解答】(1)证明:∵四边形ABCD是正方形,∴DC∥AB,BC∥AD,∴△DCP∽△BFP,△DEP∽△BCP,∴,,∴,∴PC2=PE•PF;(2)证明:∵四边形ABCD是正方形,∴AB=CD,∠DCB=90°,∴DC2=BD•DP,∴,又∵∠CDP=∠BDC,∴△CDP∽△BDC,∴∠DCP=∠DBC,∴∠DCP+∠CDP=∠CDP+∠DBC=90°,∴∠DPC=90°,∴∠BPC=90°.【点评】本题考查了正方形的性质,相似三角形的判定与性质,直角三角形的判定,熟练掌握相似三角形的判定与性质是解题的关键.46.(2021秋•浦东新区期中)在梯形ABCD中,AD∥BC,∠ABC=90°,AD=CD,O为对角线AC的中点,联结BO并延长,交边DC于点E.(1)求证:△ADC∽△BOC.(2)若=,求的值.(3)若CD=8,OE=3,求DE的长.【分析】(1)由直角三角形的性质可得BO=CO,由等腰三角形的性质和平行线的性质可证∠DAC=∠DCA =∠ACB=∠OBC,可得结论;(2)通过证明△AOF∽△COB,△DEF∽△CEB,可得BO=OF,BE=3EF,可得BO=2EF,OE=EF,即可求解;(3)设BO=AO=CO=x=OF,利用相似三角形的性质列出等式,求出x的值,即可求解.【解答】(1)证明:∵∠ABC=90°,O为对角线AC的中点,∴BO=CO=AO,∴∠OBC=∠OCB,∵AD=CD,∴∠DAC=∠DCA,∵AD∥BC,∴∠DAC=∠ACB,∴∠DAC=∠DCA=∠ACB=∠OBC,∴△ADC∽△BOC;(2)如图,延长AD,BE交于点F,∵AD∥BC,∴△AOF∽△COB,△DEF∽△CEB,∴=1=,,∴BO=OF,AF=BC,BE=3EF,∴BF=4EF,∴BO=OF=2EF,∴EO=OF﹣EF=EF,∴;(3)设BO=AO=CO=x=OF,∴AC=2x,∵CD=8,OE=3,∴AD=CD=8,EF=x﹣3,BE=x+3,∵△ADC∽△BOC,∴,∴,∴BC==AF,∴DF=﹣8,∵△DEF∽△CEB,∴,∴=,∴x=(负值舍去),∴===,∴DE=8×=6﹣.【点评】本题考查了相似三角形的判定和性质,直角三角形的性质,等腰三角形的性质,证明三角形相似是解题的关键.47.(2021秋•金山区校级期中)已知:如图,在△ABC中,点D、E分别在边AB、AC上,DE∥BC,AD2=AE•AC.求证:(1)△BCD∽△CDE;(2)=.【分析】(1)由题意可证△ADE∽△ACD,可得∠ADE=∠ACD,由平行线的性质可得∠EDC=∠DCB,∠B=∠ADE=∠ACD,可得结论;(2)由相似三角形的性质可得,可得=•=,由平行线分线段成比例可得结论.【解答】证明:(1)∵AD2=AE•AC,∴,又∵∠A=∠A,∴△ADE∽△ACD,∴∠ADE=∠ACD,∵DE∥BC,∴∠EDC=∠DCB,∠B=∠ADE,∴∠B=∠ACD,∴△BCD∽△CDE;(2)∵△BCD∽△CDE,∴,∴=•=,∵DE∥BC,∴,∴=.【点评】本题考查了相似三角形的判定和性质,掌握相似三角形的判定定理是本题的关键.48.(2021秋•金山区校级期中)如图,在△ACB中,点D、E分别在边BC、AC上,AD=AB,BE=CE,AD与BE交于点F,且AF•DF=BF•EF.求证:(1)∠ADC=∠BEC;(2)AF•CD=EF•AC.【分析】(1)利用AF•DF=BF•EF和∠AFE=∠BFD可判断△AFE∽△BFD,所以∠AEF=∠BDF,然后根据等角的补角相等得到结论;(2)由△AFE∽△BFD得到∠EAF=∠FBD,∠AEF=∠BDF,再证明∠EAF=∠C,∠ABC=∠AEF,于是可证明△AEF∽△CBA,利用相似比得到=,然后证明AD=AB=CD,从而得到结论.【解答】证明:(1)∵AF•DF=BF•EF,∴=,而∠AFE=∠BFD,∴△AFE∽△BFD,∴∠AEF=∠BDF,∵∠AEF+∠BEC=180°,∠BDF+∠ADC=180°,∴∠ADC=∠BEC;(2)∵△AFE∽△BFD,∴∠EAF=∠FBD,∠AEF=∠BDF,∵EB=EC,AB=AD,∴∠EBC=∠C,∠ADB=∠ABD,∴∠EAF=∠C,∠ABC=∠AEF,∴△AEF∽△CBA,∴=,∴EF•AC=AB•AF∵∠DAC=∠C,∴AD=CD,。

人教版九年级英语期中复习知识点归纳总结(Unit1-6)

人教版九年级英语期中复习知识点归纳总结(Unit1-6)

九年级Unit 1-6 知识点归纳总结Unit1《How can we become good learners》知识点【短语归纳】1. have conversations with sb. 同某人谈话2. too…to… 太……而不能3. the secret to… ……的秘诀4. be afraid of doing sth./ be afraid to do sth. 害怕做某事5. look up 查阅6. repeat out loud 大声跟读7. make mistakes in 在……方面犯错误8. connect ……with… 把……和……连接/联系起来9. get bored 感到厌烦10. be stressed out 焦虑不安的11. pay attention to sth./doing sth. 注意;关注12. depend on 取决于;依靠13. the ability to do sth.. 做某事的能力【单元知识点】1. by + doing :通过……方式(by是介词,后面要跟动名词,也就是动词的ing形式)2. talk about 谈论,议论,讨论The students often talk about movie after class. 学生们常常在课后讨论电影。

talk to sb= talk with sb 与某人说话3. 提建议的句子:①What/ how about +doing sth.做…怎么样(about后面要用动词的ing形式)如:What/ How about going shopping?②Why don't you + do sth.你为什么不做…如:Why don't you go shopping?③Why not + do sth.为什么不做…如:Why not go shopping?④Let's + do sth. 让我们做…吧。

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2010-2011学年度9年级上期中复习题(1)I. 单项选择:1. -- Memorizing the words of pop songs ______ one of the greatest ways to learn more English. --Yes. And I’ve learned _______that way.A. is; a lot ofB. are; a lot ofC. is; a lotD. are; a lot2. That old man lives _________, but he never feels __________.A. alone, aloneB. alone, lonelyC. lonely, aloneD. lonely, lonely3. ________ the reporter’s help, the old man found a job ________ a gatekeeper.A. Under; asB. With; asC. Under; likeD. With; like4. The price of the MP4 is too __________. I can’t afford __________it.A. expensive; to buyB. expensive; buyingC. high; to buyD. high; buying5. There ______ a pool, but there stands a tall building instead.A. used to haveB. used to beC. used to haveD. used to being6. Beijing is one of the ___________ in the world today.A. busy cityB. busiest cityC. busy citiesD. busiest cities7. – What about your brother? – My brother _______ a lot in the last few years.A. has changedB. have changedC. changedD. is changed8. I have trouble ______ my friends’ telephone number.A. to rememberB. remembersC. rememberingD. remember9. I found _____ very difficult to learn physics well.A. thatB. thisC. oneD. it10. Tom is the _______ of his parents. He never gives up ______.A. pride, studyB. proud, studyingC. pride, studyingD. pride, to study11. We teachers should _______ students ________ us questions in class.A. allow, askB. let, to askC. allow, to askD. encourage, ask12. I would rather _______ at home than ________ to a party.A. staying, goingB. to stay, to goC. stay, to goD. stay, go13. - What happened ____ you yesterday?– I was worried about my PE test because it makes up 10% ___ the final exam.A. /, /B. to, ofC. for, forD. at, in14. This red bike ________ be Jack’s. Because he has a blue one.A. mustn’tB. can’tC. mightn’tD. couldn’t15. The book is ________, and that book belongs to _________.A. mi ne, MaryB. mine, Mary’sC. my, MaryD. my, Mary’s16. They had to put off the football match ______ the heavy rain.A. becauseB. because ofC. sinceD. instead of17. I don’t believe ___________ I hear about aliens on the radio.A. strange somethingB. strange anythingC. nothing strangeD. anything strange18. - How many babies are born every day in the world?–I’m sure. Maybe _____ them.A. two millionB. millionC. millions ofD. million of19. My mother often says to me, “You can’t use others’ things ______.”A. with permissionB. with pleasureC. without permissionD. without pressure20. Bill said they would have ________ holiday.A. a two-monthB. two monthsC. two-monthsD. two month’sII. 综合填空:A.用所给词的适当形式填空。

1. We had our photos ____________ in an ocean of flowers.2. Teenagers should _____________ to do something they like.3. He had a lot of experience ______________ the problems of teenagers.4. Finally, the doctors _____________ in saving the boy in danger.5. Everyone should work hard _______________ their dreams.6. My father always ______________ some good ideas when I don’t know what to do.7.The apple ___________ down f rom the tree and hit Newton’s head.B. 阅读下面短文,选择恰当的单词填空。

注意大小写。

How do you feel when you have to 1.________ a speech in front of your classmates? Do you get really shy?Shyness means feeling nervous or 2. __________ when you are round other people. Everyone experiences this shyness as they grow up. Most people have red 3. ___________ and talk in broken sentences when they are in front of many people. It’s OK if it takes you a while to feel comfortable again when you go to a new place or meet strangers. Everybody gets 4. ________ shy sometimes. It’s just a matter of how much.Stop feeling 5. ________ about yourself. If shyness doesn’t get in the way of doing something you want, being 6._________ isn’t a very big problem. S ome experts say shy people are not only clever, but also better at 7. ________ with others, because they think 8. _________ and talk less. Some great people in history were shy, too.Light travels at a speed(速度) which is about a million times 1 . ________ than that of sound.2. ________ one second, light travels about 300,000 kilometers, but sound travels only 340 meters. You can get some idea of this difference by3. ________ the start of a running match. If you stand far away from the starter(发令员), you can see smoke4.________ from his gun5.________ the sound reaches your ears.The fast speed of light produces some strange facts. The nearest star is 6. ________ far away that light which you can see from it tonight started to travel to you four years 7. ________ at a speed of nearly two million kilometers every minute. The light from some of tonight’s started on 8. ________ journey towards you even before you were born.So, if we want to be honest, we 9. ________ say, “ The stars are shining brightly tonight.” We have to say, “ The stars look nice. They were 10. ________ four years ago but their light has just reached our earth. ”。

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