练习三(1)
《四大名著之三国》简答题练习及答案(1)
20、简述赵云百万军中救幼主的故事。 答：曹操大军来袭， 刘备携百姓渡江， 被杀得首尾不能相顾， 妻离子散。赵子龙受命保护刘备的妻儿， 但混乱中走散。 赵子龙杀人曹军阵营救出甘夫人， 又杀人重围， 怀揣幼主大战长坂坡， 砍倒大旗两面， 前后枪刺剑砍，不到两个时辰，杀死曹营上将五十余人，得以杀出重围，救出幼主。
17、人们将办事不成功称为 “走麦城 ”，典故出自《三国演义》 ，请简述这个故事。 答：关羽与东吴大将吕蒙在荆州交战，大败，退守麦城。由于兵少粮尽，关羽不得不放弃麦城向西川
撤退。关羽想走小路，部下担心有埋伏，可是关羽自恃勇力．不听劝告：果然遇到伏兵。寡不敌众， 关羽父子遭擒被杀。
18、简述威震长坂桥的故事。 答：张飞见曹操亲自率大批人马到来，他让手下二十多人砍下树枝拴在马尾上分两队在长坂桥后跑， 等到曹军来到前，他知道曹操向来多疑，于是厉声大喝： “我乃燕人张翼德也 !谁敢与我决一死战 ?”连
志与骄横霸气。刘备听了曹操的话吓得变了脸色，匙箸掉到地上，急忙借惊雷之声掩饰过去，体现了 他小心谨慎、机智从容。
5、《三国演义》中 “关羽温酒斩华雄 ”，“三英战吕布 ”、“诸葛亮舌战群儒 ”、“空城计 ”分别发生在哪 答：汜水关、虎牢关、柴桑、西城县。
6、《三国演义》中 “斩华雄 ”这段不到六百字的情节，作者是怎样刻画关羽神勇的形象 ? 答：层层烘托。 作者设置了一个难以收拾的战争场面， 让关羽出场。 虚实结合。虚写战场， 实写会场， 来表现其超群的武艺。细节点染。如 “其酒尚温 ”，化抽象为具体，显示战斗速度之快，凸显了关羽的 神勇。
故把亲儿掷马前 ”，是明显的作秀了。诸葛亮形象里，确实存在着某些 “近妖”的分子，他能算定大雾
天气，草船借箭， 能祭东风而呼风唤雨， 能预见庞统之死， 早在人川时就预摆石阵， 后来困陷陆逊 (他
六年级上册英语一课一练-Module1 Unit3(1)∣牛津上海版(三起)(含解析)
牛津上海版（三起）小学英语六年级上册Module 1 Unit 3 同步练习（1）一、音标题1.找出画线部分的发音与其他两个不相同的单词A. giraffeB. ageC. grass2.找出画线部分的发音与其他两个不相同的单词A. aliveB. liveC. life3.找出画线部分的发音与其他两个不相同的单词A. otherB. oftenC. hot4.找出画线部分的发音与其他两个不相同的单词A. closeB. usuallyC. choose5.找出画线部分的发音与其他两个不相同的单词A. matchB. ChinaC. school二、选词填空（词汇运用）6.选择合适的单词填空。
hamburger pie pizza sandwich（1）________（2）________（3）________（4）________7.将下列食物按照要求分类（1）unhealthy food：________（2）healthy food：________三、单选题8.They have a little_____.A. milkB. vegetableC. hamburgerD. egg9.He _____ some milk this morning.A. hasB. hadC. haveD. drink10.Breakfast_____important.A. isB. areC. wasD. were11.They have a lot of_____for breakfast.A. milksB. breadC. hamburgerD. waters12.I had _______bread.A. aB. someC. many13.She______have breakfast this morning.A. doesn'tB. didn'tC. don'tD. isn't14.Where _____ you last month？A. wasB. wereC. areD. is15.Thanks_____.A. a lot ofB. a lotC. lots ofD. a lots16.—Where were you last week？—I____in bed.A. wasB. amC. wereD. are17.He drinks_____milk.A. a lotB. a lot ofC. a lotsD. lot of四、写出划线部分单词的同类词。
语言学补充练习(1-3)
第一章语言学入门知识：I. 名词解释1．cultural transmission (as a defining property of language)Answer: While human capacity for language has a genetic basis, the details of any language system are not genetically transmitted, but instead have to be taught and learned. An English speaker and a Chinese speaker are both able to use a language, but they are not mutually intelligible. This shows that language is culturally transmitted. It is passed on from one generation to the next through teaching and learning, rather than by instinct. In contrast, animal call systems are genetically transmitted. They are born with the capacity to produce the set of calls peculiar to their species.2．descriptive linguistics vs. prescriptive linguisticsAnswer: A linguistic study is descriptive if it describes and analyses facts observed; it is prescriptive if it tries to lay down rules for "correct" behavior. Linguistic studies before the 204 century are largely prescriptive whereas modem linguistic is mostly descriptive.II. 判断正误（T for True and F for False）1. When language is used to get information, it serves an informative function.Answer: F (It serves an interrogative function).2．Most animal communication systems lack the primary level of articulation.Answer: F (The primary units in these systems cannot be further divided into elements. So what they lack is the secondary level of articulation.) 3．Descriptive linguistics are concerned with how languages work, not with how they can be improved.Answer: TIII. 填空题1．By saying that "language is arbitrary", we mean that there is no logical connection between meaning and _______.Answer: sounds2．The distinction between langue and parole is made by the Swiss linguist E de Saussure. The distinction between competence and performance is made by the American linguist__________.Answer: Noam Chomsky3．An approach to linguistic study which attempts to lay down rules of correctness as to how language should be used is _______.Answer: prescriptiveIV. 选择题1．Unlike animal communication system, human language is ______.A. stimulus freeB. stimulus boundC. under immediate stimulus controlD. stimulated by some occurrence of communal interestAnswer：A2. ____ has been widely accepted as the forefather of modem linguistics.a. Chomskyb. Saussurec. Bloomfieldd. John LyonAnswer: bV. 问答题l. Is language productive or not? Why?Answer: Firstly, Language is productive or creative. This means that language users can understand and produce sentences they have never heard before. Secondly, Productivity is unique to human language. Most animal communication systems have a limited repertoire, which is rapidly exhausted, making any novelty impossible. Thirdly, The productivity or creativity of human language originates from its duality. Because of duality, the speaker can combine the basiclinguistic units to form an infinite set of sentences. The productivity of language also means its potential to create endless sentences. This is made possible by the recursive nature of language.2. Comment on the f ollowing statement: “In linguistics, ‘language’ onlymeans what a person says or said in a given situation”.Answer: This statement is incorrect. In linguistics, "language" has several layers of meaning: firstly, the whole of a person’s language, e.g. Sha kespeare’s language; secondly, a particular variety or level of speech or writing, e.g. scientific language, literary language, colloquial language; thirdly, an abstract system underlying the totality of the speech/writing behavior of a community, e.g. the English language, the Chinese language; lastly, there is an even more abstract sense of "language", referring to the common features of all human languages that distinguish them from animal communication systems or any artificial language.3. Point out three ways in which linguistics differs from traditional grammar.Answer: Firstly, most linguistic analyses today focus on speech rather than writing. Secondly, modem linguistics is mostly descriptive while traditional grammar is largely prescriptive. Thirdly, a third difference is the priority of synchronic description over the traditional diachronic studies.4. What is the major difference between Saussure' s distinction between langue and parole and Chomsky's distinction between competence and performance?Answer: Saussure’s langue is social product, a set of conventions for a speech community. Chomsky regards competence as a property of themind of each individual. Saussure studies language more from a sociological point of view while Chomsky studies it more from a psychological point of view.第二章语音学和音位学I. 名词解释1．narrow transcriptionAnswer: There are two ways to transcribe speech sounds. One is the “broad transcription”----the transcription with letter-symbols only, and the other is “narrow transcription”---the transcription with letter-symbols accompanied by the diacritics which can help bring out the finer distinctions than the letters alone may possibly do.2. Illustrate the term “allophone” with at least one appropriate example. Answer: Allophones are the different members of a phoneme, sounds which are phonetically different but do not make one word different from another in meaning. For example, in English, the phoneme /l/ is pronounced differently in "let", "play" and "tell". The first /l/ is made by raising the front of the tongue to the hard palate, while the vocal cords are vibrating; the second /l/ is made with the same tongue position as the first, but the vocal cords are not vibrating; and the third /l/ is made by raisingnot only the front by also the back of the tongue while the vocal cords are vibrating.II 判断正误（T for True and F for False）1. /o/ is a mid-high front rounded vowel.Answer: F. (/o/ is a mid-high BACK rounded vowel.)2. A phoneme in one language or one dialect may be an allophone in another language or dialect.Answer: T.III. 填空题：1. The three cavities in the articulatory apparatus are _____, _______, and _____.Answer: pharynx, the nasal cavity, the oral cavity2. By the position of the ____ part of the tongue, vowels and classified as front vowels, central vowels and back vowels.Answer: highest.3. ____refers to the change of a sound as a result of the influence of an adjacent sound.Answer: Assimilation.4. You are required to fill in the blanks below abiding by the instancegiven beforehand.Example: /p/: voiced bilabial stop/s/: ________________/g/:_______________/tʃ/:______________/t/: _______________/f /: _______________Answer:/s/: voiceless alveolar fricative/g/: voiced velar stop/tʃ/: voiceless alveo-palatal/post-alveolar affricate/ t /: voiced dental fricative/f /: voiceless labiodental fricative5. Which of the following words would be treated as minimal pairs and minimal sets?pat, pen more, heat, tape, bun, fat, ban, chain, tale, bell, far, meal, vote, bet, heel, ten, men, pit, main, hit, eat, manAnswer:pat, fat; pat, pit; pit, hit;pen, ten; ten, men;heat, eat; heat, heel;tape, tale;bun, ban;chain, main;bell, bet;meal, heel;man, men, main.IV. 选择题1. All syllables contain a(n) _______.a. nucleusb. codac. onsetAnswer: a2. _____is one of the supersegmental features.a. Stopb. Voicingc. Deletiond. ToneAnswer: d3. Which of the following consonants does not exist in English?a. dental stopb. bilabial stopc. alveolar stopd. velar stopAnswer: a4. _____is not an English consonant.a. Labiodental plosiveb. Alveolar nasalc. Velar stopd. Dental fricativeAnswer: aV. 辨音选择1. What are the distinctive features that group the following sounds in these sets?1) /f, v ,s/2) /p, f, b/3) /g, z, b/4) /k, g, w/5) /m, n, ŋ/Answer: 1) fricative 2) obstruent 3) voiced 4) velar5) nasal2. There is one segment that does not belong to the natural class in each of the following groups of speech sounds. You are required to identify that segment and label the natural class, using a descriptive term asspecific as possible.a) /m/, /n/, /w/, / ŋ /b) /v/, /w/, /z/, /t/c) /n/, /f/, /l/, /s/, /t/, /d/, /z/Answer:1) /w/ is a semi-vowel, and the others are all nasals.2) /t/ is voiceless, and the others are voiced.3) /f/ is labiodental, and the rest are alveolarVI. 问答题1．Circle the words that contain a sound as required:1) a low vowel: pipe, gather, article, leave, cook2) a bilabial consonant: cool, lad, leap, bomb, push3) an approximant: luck, boots, word, once, table4) a front vowel: god, neat, pit, lush, cook5) a velar: god, fast, chat, lake, quick2．Exemplify the relationship between phone, phoneme and allophone. Answer: Firstly, a “phone” is a phonetic unit or segment. The speech sounds we hear and produce during linguistic communication are all phones. Phones may or may not distinguish meaning. Secondly, a "phoneme" is a phonological unit that is of distinctive value. As an abstract unit, a phoneme is not any particular sound. It is represented orrealized by a certain phone in a certain phonetic context. Thirdly, the phones representing a phoneme are called its "allophones". How a phoneme is represented by a phone, or which allophone is to be used, is determined by the phonetic context in which it occurs. But the choice of an allophone is not random but rule-governed in most cases.3．When we are pronouncing the following phrases, how do we actually articulate the "n" sound in the word "ten"? Do we still pronounce it as /n/?1) ten houses 2) ten teachers 3) ten colleges 4) ten pupils 5) ten buildings 6) ten classesAnswer: 1) /n/2) /n/3) / ŋ /4) /m/5) /m/6) / ŋ /4．How many functions do the vocal cords have in the production of speech sounds?Answer: They have three functions: to make a glottal stop, to produce a voiced sound and to produce a voiceless sound.第三章形态学I. 名词解释1．morphemeAnswer: The morpheme is the smallest unit in terms of relationship between expression and content, a unit which cannot be divided without destroying or drastically altering its meaning, whether it is lexical or grammatical. For instance, the word "barks" in "The dog barks" consists of two morphemes ― "bark" and "-s", neither of which can be further divided into other smaller meaningful units.2．lexemeAnswer: The term "lexeme" is postulated to reduce the ambiguity of the term "word". It is the abstract unit underlying the smallest unit in the lexical system of a language, which appears in different grammatical contexts. For example, "write" is the lexeme of the following set of words: "writes", "wrote", "writing", "written".3．inflectional morphemesAnswer: Inflectional morphemes are also called inflectional affixes. They manifest various grammatical relations or grammatical categories such as number, tense, degree and case. In English, all inflectional morphemes are suffixes, e.g. -(e)s, -ing, -(e)d, -est.II. 判断正误1．A root is not always a free form.Answer: T (There are such bound roots as “-ceive”.)III. 填空题1．Polymorphemic words other than compounds have two parts: the roots and the ____.Answer: affixes2．On, before and together are_____words ― they are words which do not take inflectional endings.Answer: grammatical (functional/form)IV．选择题1．"Radar" is a/an____.a. acronymb. blendingc. coinaged. clippingAnswer: a2．Compound words consist of______ morphemes.a. boundb. freec. both bound and freeAnswer: bV. 匹配题Match each expression under A with the one statement under B that characterizes it.A B1. a noisy crow a. compound noun2. eat crow b. root morpheme plus derivational prefix3. scarecrow c. phrase consisting of an adjective plus noun4. the crow d. root morpheme plus inflection affix5. crowlike e. root morpheme plus derivational suffix6. crows f. grammatical morpheme followed by lexical morphemeg. idiomAnswer: 1. c 2. g 3. a 4. f 5. e 6. dVI. 问答题1. Divide the following words into Roots, IA (inflectional affix) and/or DA (derivational affix).1) transformations 2) looseleaves3) destructive 4) geese 5) misledAnswer:1) trans- (DA) form (Root) -ation (DA) s (IA)2) loose (Root) leave (Root) s (IA)3) de- (DA) struct (Root) -ive (DA)4) geese (IA)5) mis- (DA) led (IA)2. Label the morphological category of the morphemes underlined in each of the English expressions.a) I' ve been here.b) transformc) oxend) recurAnswer: a) bound morpheme b) derivational prefix c) inflectional suffix d) bound root3. Each of the following Persian words is poly-morphemic. You are required to match each of the notions given below with a morpheme in Persian. (Note that xar means "buy" and -id designates the past tense). xaridiYou (singular) bought.naxaridamI did not buy.namixaridandThey were not buying.xaridHe bought.naxaridimWe did not buy.mixaridHe was buying.mixarididYou (plural) were buying.xaridamI bought.Match each of the notions given below with a morpheme in Persian:a) Ib) you (singular)c) notd) was/were V-ing (continuous)Answer: a) amb) ic) nad) miVid4．It is a fact that morphological processes may be sensitive to certain phonological context. The English data given below illustrate this fact. You are required to state the phonological contexts where the addition of -en is possible.a bwhiten *bluenmadden *stupidenredden *greenenFatten *fartheren quicken *slowendeafen *difficultenLiven *abstractenharden *shallowensoften *angryendeepen *vividenAnswer: The suffix -en, which attaches to adjectives to form verbs, can only attach to monosyllabic bases ending in oral stops or fricatives.VerbAdjective-en if Adjective ends in an obstruent (oral stop or fricative).- <Φ> if Adjective ends in a sonorant (nasal, approximant, vowel) Meaning: to make (more) Adjectives5．The word uneasiness may be analyzed in either of the two ways below. You are required to find an argument to support one of the two analyses.a)NPrefixNoununAdjectiveSuffixeasinessb)NAdjectiveSuffixPrefixAdjectivenessuneasiAnswer: b) is the correct analysis, because un- only attaches to adjectivesto form other adjectives. Un- cannot be attached to a noun.。
三(下)数学(人教版)期中应用题专项练习(1)
三年级数学下册期中复习专项训练——《应用题》（一）班级：_________ 姓名：__________1．（1）买一辆的钱可以买多少个？（2）王叔叔带来的钱可以买2部，现在他想用带来的钱买，可以买多少个？2．一本书有186页，小林看了60页，余下的计划7天看完。
平均每天看多少页？3．从北京到上海的一列火车20:00开车，第二天8:00到达，已知火车的时速为98公里，那么这列火车共行驶了多少公里？4．某小学三年级学生向灾区共捐款960元，用这些钱为灾区小朋友买22套学习用品（1个书包和1个文具盒为1套）。
（1）买22套学习用品，需要多少钱？（2）余下的钱买每本4元的笔记本，能买多少本？5．今天儿童剧场的座位票全部售完，一共卖了多少钱？6．五月份草莓成熟，两家人相约去草莓园摘草莓。
平均每人摘了多少颗草莓？7．（1）闹钟的价格是多少？（2）三（5）班一共有38名学生每人买一个闹钟，共需要多少钱？8．为弘扬中华传统美德，学校购进960本《弟子规》，平均分给1－6年级，每个年级都有4个班，每班分得多少本《弟子规）？9．阳光小学28位老师带领14个班的同学去参观“周恩来纪念馆”，平均每班有38名同学，公交公司开来的汽车共有600个座位，这些汽车的座位够吗？10．新冠肺炎疫情发生以来，学校开展了史无前例的大规模线上教育教学，这一举动增加了广大青少年观看电子屏幕的时间，社会各界都在关注在这期间对孩子视力的影响。
下表是某市某小学复学后三年级视力检测统计表。
（2）上学期三年级同学近视的人数为38人，复学后近视人数增加了（）人。
（3）你知道哪些保护视力的方法？请写在下面。
11．裕华小学美术组有36个同学，科技组的人数是美术组的3倍。
科技组又分成6个小队，平均每个小队有多少人？12．在疫情期间，某药店为部分居民免费发放口罩。
共发放了4箱，每箱25包，每包20个，共发放了多少个口罩？13．实验小学一共有32个班，平均每个班分12个皮球，一共有多少个皮球？14．学校买来252根跳绳，平均分给三年级7个班，每个班大约分得多少根？15．实验小学四个课外活动小组的学生人数情况如下。
21世纪大学实用英语综合练习第三册答案(1-8全部)
Part I Text ExercisesVI.Passage 1: 1. A 2. C 3. D 4. C 5. CPassage 2: 1. C 2.B 3.A 4. C 5. AII.1. A 2. D 3. D 4 C 5. C 6. C 7. A 8. D 9. B 10. B 11. A 12. A 13. D14. C 15. C 16. C 17. C 18.B 19. B 20. A21. robberies 22. Consciousness 23. leaves 24. felt 25. will be finished26. recovered 27. curious 28. combination 29. was knocked 30. praisedIII.1. A 2. D 3. C 4. A 5. D 6. B 7. D 8. B 9. A 10. C Unit 2 Book III.VI.Passage 1: 1. C 2. D 3. A 4. B 5. CPassage 2: 1. C 2. D 3. B 4.B 5. AVII1. persistence 2. high-quality 3. impossible 4. see beyond 5. one’s attitudeII. 1. D 2. A 3. A 4. B 5. D 6. C 7. D 8. C 9. B 10. B 11. A 12. C 13. B14. B 15. A 16. C 17. A 18.D 19. C 20. B21. encourage 22. intensified 23. have been talking 24. have been forced25. wouldn’t have printed 26. prestigious 27. Global 28. imagination29. prestigious 30. experimenting III. 1. A 2. C 3. D 4. A 5. B6. letter of shipment7. Tokyo8.two 9. in good order 10. futureordersUnit 3V. Passage 1: 1. D 2. C 3.A4.C5. BPassage 2:1. C 2. B 3.D 4. A 5. BVI.1. being laughed at2. anaverage child 3. develop herself-confidence4. participate in/ take part in5.believe in herselfII. 1. C 2.C 3. B 4. A 5. D6. D7. A8. B9. B 10. A11. D 12. A 13. C14. B 15. A 16. D 17. A 18.B 19.C 20. D21. has not woken/ waked 22.would stay 23. couldn’t h aveovercome24. energetic 25. supervision26. approval 27. to be put 28.to save29. innovations 30. hostileUnit 4 V. Passage 1: 1. D 2.C3. A4. B5. DPassage 2: 1. A 2.D 3. B4.B5. DVI. 1. was paralyzed 2. braininjury 3. local social worker 4.give up 5. a debtPart II Exercises for PRETCOSection A 1. B 2.B 3. C4.A5. DSection B 6. C 7. D 8.C 9. A10. D11. five (years old) 12.seventeen or eighteen 13.bytax money14. whose parents live 15. 50percentII. 1. B 2. A 3. C 4. D 5. D6. A7. B8. C9. A 10. B11. D 12. C 13. B14. A 15. C 16. D 17. A 18.A 19.B 20. C21. financial 22. awareness 23.is missing 24. disabilities 25.will have worked26. corruption 27. survived28. had been cut 29. beassigned 30. being admittedIII.1. A 2. C 3. B 4.B 5. D6. Chinese and foreignprofessionals 7. Spoken andwritten8. (the) foreign studentdormitories 9. two (requirements)10. field trips1. A2. B3.B4. D5. C6. B7. D8. D9. C 10. CPat IV Cloze1. to2. pay3. without4.with 5. before 6. deserve7. sound 8. from 9. how 10.byUnit 5ⅥPassage 1: ADDCA Passage2:DBBCDⅦ1.have emotionally connected 2.lessthan half 3.be in love 4.happierthan 5.similiar goalPartⅡ1-20.CDABC ADBCD ADCBDABCAB Ⅲ1-5.CADAB6-10.HDGAE1）尊敬的XX 先生/女士：我公司在9月4日的会议上，已经决定把我公司的名称改为CNMIEC 李氏公司。
2024年春学期北师大版小学数学一年级下册教学进度表
4
3.18——3.22
看一看（二），数花生，数一数，数豆子
5
5
3.25——3.29
谁的红果多，小小养殖场，做个百数表，练习二（1）
5
6
4.01——4.03
练习二（2），认识图形
3
清明节
4.04——4.06
7
4.08——4.12
动手做（一），动手做（二），动手做（三）
5
8
4.15——4.19
整理与复习（1），整理与复习（2），整理与复习（3）
5
9
4.22——4.26
期中复习，期中测试
5
10
4.29——4.30
小兔请客，采松果
2
劳动节
5.01——5.05
11
5.06——5.11
青蛙吃虫子，拔萝卜，收玉米，回收废品
6
周六上班
12
5.13——5.17
练习三（1），练习三（2），分扣子，填数游戏
5
13
5.20——5.24
图书馆（1），图书馆（2），摘苹果，练习四（1）
总复习
5
18
6.24——6.28
总复习
5
19
7.01——7.05
期末测试
5
北师大版小学数学一年级下册教学进度表
（2023——2024学年度）
周次
时间
教 学 内 容周课时数备注源自12.26——3.01
开学第一课，买铅笔，捉迷藏，快乐的小鸭
5
2
3.04——3.08
开会啦，跳伞表演（1），跳伞表演（2），美丽的田园
5
3
3.11——3.15
练习一（1），练习一（2），做个减法表，看一看（一）
21世纪大学实用英语综合练习第三册答案(1-8全部)
Part I Text ExercisesI.A. 1. hopeless 2. homeless 3. careless 4. needless 5. endless6. useless7. helpless8. pennilessB. backward(s) eastward(s) forward(s) northward(s) onward(s) southward(s)1. northward(s)2. southward(s)3. eastward(s)4. backward(s)5. onward(s)6. forward(s)II.1. be in a good mood2. be on top of the world3. have a bad day4. look on the positive side5. be curious about sth6. each time I am in a bad mood7. cut away all the junk8. react to an emergency9. reflect on what sb says10. be help up at gunpoint 11. the first thing that went through my mind12. be allergic to sthIII.1. K2. E3. A4. F5. H6. B7. J8. C9. D 10. L 11. G 12. IIV.go + ad. / prep.1. G2. A3. E4. F5. C6. D7. H8. B9. go about 10. have gone by 11. going for 12. went off 13. go along with 14. going on 15. went through 16. go overcut + ad./ prep.1. cut across / through2. cut away3. cut back4. cut down5. cut in6. cut off7. cut out8. cut up9. cut … down 10. cut off11. cut out 12. cut up 13. cut through 14. cut away15. cut back 16. cutting inV.1. get2. time3. wake4. choices5. choose6. victim7. complaining8. out 9. that 10. away 11. react 12. affectVI.Passage 1: 1. A 2. C 3. D 4. C 5. CPassage 2: 1. C 2. B 3. A 4. C 5. AVII.1. outward behavior2. negative thoughts3. think about yourself4. an example5. a positive attitudePart II Exercises for PRETCOI. Listening ComprehensionII. 1. --- I’d like to buy a new coat.--- The woman’s department is up on the second floor, Madam.Q: Where does this conversation take place? --- D2. --- Are you ready to leave?--- Just a second. I need to put my camera in the suitcase.Q: What does the man mean? --- D3. When is the library open on Saturday?--- From 8 a.m. to 7 p.m.Q: How long is the library open on Saturday? --- Ｂ４．Tom, we are going see Mary. Would you like to go with us?--- Yes, but I’ll make a call to my wife first.Q: What is the man going to do first?--- Ｂ５．What shall we give Peter for his birthday?--- Let’s ask him what he needs most.Q: What does the man suggest? --- CSection BConversation 1--- Hi Joe. I see you’re busy right now. As soon as you finish, I’d like to discuss our plan again.--- That’s OK. Come on in.--- Oh, no. I don’t want to interrupt you. I can wait. I’ll come back later.--- I’m afraid it’s going to be a long wait. I’m working on my history paper. And, it’s already 10 o’clock, bedtime.--- History paper? I thought you’d finished it. Didn’t you turn it in on Friday?--- Uh-huh. But the professor just returned it to me. I was told to add 12 more pages.--- 12 pages! That’ a lot. How are you going to do it?--- That’s what I’m trying to figure out. Now please come in and sit down. What can I do for you?--- Thanks a lot, but I think I’d better come to visit you tomorrow. See you.Qs:6. When did this conversation take place? --- c7. Why did the woman come to visit the man? --- AConversation 2--- Hello, Professor Ward speaking.--- I’m sorry. There are already too many students in that class.--- I know. But I’m a student from ano ther university, and my school and I think it would be very interesting and important for my studies.--- I see. Have you studied much botany? It’s an advanced course, you know.--- Yes, I am majoring in biology and I’ve also done some economic botany on my own.--- Well, I’ll do my best. Why don’t you come to my office next week? I’ll be in all day Wednesday. I can tell you more about the class and the other courses here. In any case, you’ll have to see Professor Chambers to get his approval. If all else fails, you can register for my course in the spring. We cover many of the same topics then.--- Thanks, I’ll be in on Wednesday then.Qs:8. Why is Ann calling? --- B9. What problem is involved in Ann’s attending the class? --- D10. What can Ann do if she can’t take Professor Ward’s class? --- BSection CMr. Gray was the manager of a small office in London. He lived in the country, and came to work by train. He liked walking from the station to his office, unless it was raining, because that gave him some exercise.One morning he was walking along the street when a stranger stopped him and said, “You may not remember me, sir, but seven years ago I came to London without a penny in my pocket. I stopped you in his street and asked you to lend me some money, and you lent me ￡5 you said you were willing to take a chance giving a man a start on the road to success.”Mr. Gray thought for a few minutes and then said, “Yes, I remember you. Go on with your story.” “Well,” answered the stranger, “are you willing to take still another chance?”Qs:11. How did Mr. gray get to his office?12. Why did Mr. Gray like walking to his office?14. Why had Mr. Gray given some money to the stranger?15. What did the stranger do when he recognized Mr. Gray one day?Keys:11. took a train 12. do some exercise 13. A stranger 14. take a chance 15. for moneyII.1. A2. D3. D 4 C 5. C 6. C 7. A 8. D 9. B 10. B 11. A 12. A 13. D14. C 15. C 16. C 17. C 18. B 19. B 20. A21. robberies 22. Consciousness 23. leaves 24. felt 25. will be finished26. recovered 27. curious 28. combination 29. was knocked 30. praisedIII.1. A2. D3. C4. A5. D6. B7. D8. B9. A 10. CIV.1. A. 2 B. 0.5 C. 0 D. 12. A. 1 b. 0.5 C. 0 D. 23. A. 2 B. 1 C. 0 D. 0.54. A. 0.5 B. 2 C. 1 D. 05. 尊敬的XX 先生/女士：我公司在9月4日的会议上，已经决定把我公司的名称改为CNMIEC 李氏公司。
5 1 轴练习题(三)
5 1 轴练习题(三)5-1轴练习题(三)5-1轴心运动（三）班级姓名学号一、填空1，轴的结构除了考虑零件固定与支承以外，还需考虑到加工、装配等的工艺性要求。
2.在轴的加工工艺性中，需磨削的轴段，阶梯处应设有砂轮越程槽；需切制螺纹的轴段，应设有螺尾退刀槽；轴的长径比l/d大于4时，轴的两端应开设中心孔，以便于加工时用顶尖支承和保证轴段的同轴度。
3.在轴的结构中，加工工艺所需的常见结构元件是砂轮过行程槽、螺旋尾背槽和中心孔。
4.为了减少刀具种类和节省换刀时间，同一轴上的所有圆角半径、倒角尺寸和环形槽宽度应尽可能统一。
轴上不同轴段的健康槽应布置在轴的同一母线上，以便一次夹紧后用铣刀切割。
5.轴的轴端（指零件）通常采用圆螺母轴向固定的方法，可承受较大的轴向力。
圆螺母的大直径应小于（大于、小于或等于）安装件的孔径。
一般采用普通细螺纹，以减少对轴强度的影响。
6、为保证圆螺母的固定，常采用双圆螺母或圆螺母加止动垫圈方法来防松。
7.用轴端扣环、轴套、圆螺母轴向固定时，安装件的轮毂长度应大于安装件的轴段长度，使安装件端面靠近固定件就位。
8、轴常设计成阶梯形的目的有便于零件定位和便于装拆。
9.为了保证零件的扭矩传递，防止零件与轴向之间的相对旋转，轴上的旋转零件应沿圆周方向固定。
常用的固定方法有键联接和过盈配合，其中键联接形式应用最为广泛。
10、为了便于零件装拆，阶梯轴各段直径应从轴端分别向中间增大，轴端应出倒角。
11，为保证零件固定可靠，与轮毂相配合的轴段长度应比轮毂宽度略短，为便于加工，同一个轴上的键槽应在同一加工直线上。
12.在轴的结构设计中，增加轴的过渡圆角半径是为了减少应力集中。
13，在轴的结构设计中，为了减小应力集中，应尽可能减少阶梯的变化次数和变化幅度，且在阶梯过渡处，应采用尽可能大的过渡圆角。
二、判断问题（×）1，阶梯轴的截面尺寸变化处采用圆角过渡目的是为了便于加工。
(√) 2.如果同一轴上有多个键槽，则键槽应布置在同一条直线上，宽度应一致，以便于加工。
人教版九年级上册 第21章 《一元二次方程实际应用》专项练习(三)
第21章《一元二次方程实际应用》专项练习（三）1．香果园大型水果超市的江安李子和山东烟台红富士苹果这两种水果很受欢迎，苹果售价24元/千克，李子售价18元/千克．（1）若第一周苹果的平均销量比李子的平均销量多200千克，要使这两种水果的总销售额不低于13200元，则第一周至少销售苹果多少千克？（2）若该水果超市第一周按照（1）中苹果和李子的最低销量销售这两种水果，并决定第二周继续销售这两种水果，第二周苹果售价降低了a%，销量比第一周增加了a%．李子的售价保持不变，销量比第一周增加了a%，结果这两种水果第二周的总销售额比第一周增加了a%，求a的值．2．如图，在矩形ABCD中，AB＝16cm，BC＝6cm，点P从点A出发，以3cm/s的速度向点B 移动，一直到达点B为止；同时，点Q从点C出发，以2cm/s的速度向点D移动．当其中一个点停止移动时，另一个点也随之停止，设移动时间为ts，连接PQ．（1）当t＝2时，求PQ的长；（2）当PQ＝10cm时，求t的值．3．重庆两江国际影视城，是集影视拍摄、文化旅游、度假休闲、历史风貌观光为一体的大型综合性旅游景区，其厚重的文化底蕴和独特的历史场景深受广大人群喜爱景区陆续复原兴建了抗战胜利记功碑、群林市场等200多栋反映重庆开埠以来尤其是陪都时期的著名建筑和历史街区，广大游客也因此称其为“民国街”．某商家抓住商机，准备在“民国街”售卖中山装和旗袍．去年十一月，中山装的单价为每件120元，旗袍的单价为每件180元，商家售卖中山装的销售额比售卖旗袍的销售额少1200元．（1）若去年十一月中山装的销售量不超过旗袍的销售量，求售卖中山装的销售额最大为多少元？（2）受市场影响，与去年同期相比，今年十一月，同款中山装的单价上涨了0.5a%，同款旗袍的单价上涨了a%，若两款服装的销售量都比（1）问中中山装的销售额取最大值时对应的销售量少a%，则两款服装的总销售额只比去年十一月的最大销售额少300元，求a的值．4．十九大以来，为全面推进新农村建设，积极改革农村产业结构，增加农民收入，致富村村委会多方努力，共获得流转耕地1000亩，全部用于种植纽橙和蔬菜，其中种植蔬菜的面积不少于种植纽橙面积的4倍．（1）求该村种植蔬菜的面积至少为多少亩？（2）今年村里按（1）中蔬菜种植面积的最小值种植蔬菜，纽橙和蔬菜上市后，纽橙每亩获利800元，蔬菜每亩获利600元；明年在保持纽橙种植面积不变的情况下，纽橙亩产量将上涨，预计每亩利润将增加3a%；同时利用新增流转耕地，使蔬菜种植面积扩大α%，并改良蔬菜种植结构，蔬菜每亩利润将增加a%这样，明年纽橙和蔬菜的总利润将比今年的总利润增加a%．求a的值．5．某商店以40元/千克的单价新进一批茶叶，经调查发现：在一段时间内，这批茶叶的销售量y（千克）与销售单价x（元/千克）之间的函数关系式为y＝﹣2x+240（40≤x≤120）．（1）商店想在销售成本（进价总额）不超过3000元的情况下，使销售利润达到2400元，销售单价应定为多少？（2）在（1）中，该商店为了国庆期间促销这批新进茶叶，经过两次降价将销售价格定为81元/千克，求平均每次降价的百分比．6．某校在开展“校园献爱心”活动中，准备向某山区学校捐胎男、女两种款式的书包，共有200名学生参加活动，平均每人捐款15元，用全部的捐款购买这两种款式的书包各30个，捐赠给了该山区学校．已知购买一个男款书包比购买一个女款书包少20元．（1）购买一个男款书包、一个女款书包各需多少元？（2）经调查该山区学校共有男学生63名，女学生56名，为保证每一个男学生都有一个男款书包，每一个女学生都有一个女款书包，需要再次进行补充捐赠，在补充捐赠活动中，自愿参与的学生在200名的基础上增加了a%（其中a＞0），平均每人需捐款的钱数在15元的基础上减少了a%，求a的值．7．“万州古红桔”原名“万县红桔”，古称丹桔（以下简称为红桔），种植距今至少已有一千多年的历史，“玫瑰香橙”（源自意大利西西里岛塔罗科血橙，以下简称香橙）现已是万州柑橘发展的主推品种之一．某水果店老板在2017年11月份用15200元购进了400千克红桔和600千克香橙，已知香橙的每千克进价比红桔的每千克进价2倍还多4元．（1）求11月份这两种水果的进价分别为每千克多少元？（2）时下正值柑橘销售旺季，水果店老板决定在12月份继续购进这两种水果，但进入12月份，由于柑橘的大量上市，红桔和香橙的进价都有大幅下滑，红桔每千克的进价在11月份的基础上下降了m%，香橙每千克的进价在11月份的基础上下降了m%，由于红桔和“玫瑰香橙”都深受库区人民欢迎，实际水果店老板在12月份购进的红桔数量比11月份增加了m%，香橙购进的数量比11月份增加了2m%，结果12月份所购进的这两种柑橘的总价与11月份所购进的这两种柑橘的总价相同，求m的值．8．如图，在长方形ABCD中，AB＝10厘米，BC＝6厘米，点P沿AB边从点A开始向点B以3厘米/秒的速度移动；点Q沿DA边从点D开始向点A以2厘米/秒的速度移动，如果P、Q同时出发，用t（秒）表示移动的时间，那么：（1）如图1，用含t的代数式表示AP＝，AQ＝，并求出当t为何值时线段AP＝AQ．（2）如图2，在不考虑点P的情况下，连接QB，问：当t为何值时△QAB的面积等于长方形面积的．9．某市每年都举行“希望杯”篮球赛，去年初赛阶段，共15支队伍参赛，每两队之间都比赛一场，下表是去年初赛部分队伍的积分榜．队名比赛场次胜场负场积分A 14 10 4 24B 14 9 5 23C 14 4 10 18D 14 0 14 14（1）去年某队的总积分为20分，则该队在比赛中胜了多少场？（2）今年，参赛的队伍比去年有所增加，但因场地受限，组委会决定初赛阶段共安排40场比赛，并将参赛队伍平均分成4个小组，各小组每两队之间都比赛一场，求今年比去年增加了多少支队伍？10．某校八年级学生小阳，小杰和小凡到某超市参加了社会实践活动，在活动中他们参与了某种水果的销售工作，已知该水果的进价为10元/千克，下面是他们在活动结束后的对话．小阳：如果以12元/千克的价格销售，那么每天可售出300千克．小杰：如果以15元/千克的价格销售，那么每天可获取利润750元．小凡：我通过调查验证发现每天的销售量y（千克）与销售单价x（元）之间存在一次函数关系．（1）求y（千克）与x（元）（x＞0）的函数关系式；（2）当销售单价为何值时，该超市销售这种水果每天获得的利润达600元？参考答案1．解：（1）设第一周销售苹果x 千克．则销售李子（x ﹣200）千克， 根据题意得：24x +18（x ﹣200）≥13200， 解得：x ≥400，答：第一周至少销售苹果400千克；（2）根据题意得：24（1﹣a %）×400（1+a %）+18×200（1+a %）＝13200（1+a %）， ∴a 1＝，a 2＝0（舍去）．答：a 的值为2．解：（1）作QH ⊥AB ，垂足为H ，则QH ＝BC ＝6， 当t ＝2时，AP ＝3×2＝6cm ，QC ＝2×2＝4cm ， ∴BH ＝QC ＝4cm ，∴PH ＝AB ﹣AP ﹣BH ＝16﹣6﹣4＝6cm ， ∵PQ 2＝PH 2+QH 2， ∴PQ ＝＝6；（2）设P ，Q 两点从出发经过t 秒时，点P ，Q 间的距离是10cm ，则QH ＝BC ＝6，PQ ＝10，HP ＝AB ﹣AP ﹣BH ＝16﹣5t ．∵PQ 2＝PH 2+QH 2，可得：（16﹣5t ）2+62＝102， 解得t 1＝4.8，t 2＝1.6．故当PQ ＝10cm 时，t 的值为1.6或4.8秒．3．解：（1）设售卖中山装的销售额为x 元，则售卖旗袍的销售额为（x +1200）元， 根据题意得：≤，解得：x ≤2400．答：售卖中山装的销售额最大为2400元．（2）去年十一月中山装、旗袍的销售量为2400÷120＝20（件）．根据题意得：120×（1+0.5a%）×20×（1﹣a%）+180×（1+a%）×20×（1﹣a%）＝2400+2400+1200﹣300，令m＝a%，原方程整理得：40m2+2m﹣3＝0，解得：m1＝0.25，m2＝﹣0.3（不合题意），∴a＝25．答：a的值为25．4．解：（1）设该村种植蔬菜的面积为x亩，则种植纽橙的面积为（1000﹣x）亩，根据题意得：x≥4（1000﹣x），解得：x≥800．答：该村种植蔬菜的面积至少为800亩．（2）根据题意得：800（1+3a%）×（1000﹣800）+600（1+a%）×800（1+a%）＝[800×（1000﹣800）+600×800]×（1+a%），令m＝a%，则原方程可整理得：m2﹣m＝0，解得：m1＝，m2＝0（不合题意，舍去），∴a%＝，∴a＝20．答：a的值为20．5．解：（1）由题意得：（x﹣40）（﹣2x+240）＝2400，解得：x1＝60，x2＝100，当x＝60时，销售量为120千克，则销售成本为40×120＝4800（元），超过了3000元，不合题意，舍去，当x＝100时，销售量为40千克，则销售成本为40×40＝1600（元），低于3000元，符合题意，所以销售单价应定为100元；（2）设平均每次减价的百分比是x，根据题意得：100（1﹣x）2＝81，解得：x1＝0.1＝10%，x2＝1.9（舍去），即平均每次减价的百分比为10%．6．解：（1）购买一个男款书包需x 元，则购买一个女款书包需（x +20）元， 根据题意得30（x +x +20）＝200×15， 解得x ＝40， 则x +20＝60，答：购买一个男款书包、一个女款书包分别需40元、60元；（2）根据题意得200×（1+a %）×15×（1﹣a %）＝（63﹣30）×40+（56﹣30）×60， 整理得（a %）2＝，解得a %＝或a %＝﹣（舍去）， 所以a ＝20． 答：a 的值为20．7．解：（1）设11月份红桔的进价为每千克x 元，香橙的进价为每千克y 元，依题意有，解得．答：11月份红桔的进价为每千克8元，香橙的进价为每千克20元； （2）依题意有8（1﹣m %）×400（1+m %）+20（1﹣m %）×600（1+2m %）＝15200， 解得m 1＝0（舍去），m 2＝49.6． 故m 的值为49.6．8．解：（1）由题意得：AP ＝3t ，DQ ＝2t ，则AQ ＝6﹣2t ， 当AP ＝AQ 时，3t ＝6﹣2t ，t ＝1.2；故答案为：3t ，6﹣2t ； （2）∵，∴，得：t ＝19．解：（1）设胜一场积x 分，负一场积y 分，由表格数据中知，解得：，设胜m场，则负（14﹣m）场，列方程得：2m+（14﹣m）＝20，解得：m＝6，答：该队胜6场；（2）由题意可得，每个组比赛场数：40÷4＝10场，设每个小组有n支队伍，列方程得：n（n﹣1）＝10，解得：n1＝5，n2＝﹣4（不合题意舍去），所以5×4﹣15＝5（支），答：今年比去年增加了5支队伍．10．（1）解：当销售单价为15元/千克时，销售量为：＝150（千克）．设y与x的函数关系式为：y＝kx+b（k≠0），把（12，300），（15，150）分别代入得：，解得，∴y与x的函数关系是：y＝﹣50x+900．（2）由题意：（﹣50x+900）（x﹣10）＝600，解得x＝16或12．销售单价为每千克12元或16元时，每天获取利润600元．。
(2024版新教材)三年级英语上册unit4 同步练习(1)含答案
Unit4Plants around us A同步练习一、听录音，圈出你所听到的单词的首字母。
1.a o2.b p3.n u4.m n5.i l二、听录音，用数字给下列图片标号，并将单词与对应的图片相连。
banana apple flower orange grapes（）（）（）（）（）三、听录音，给下面的句子排序。
（）1.Not really.I like grapes.（）2.Mike,do you like apples?（）3.Apples make you strong.（）4.Yes,I do.And you?（）5.I like fresh air and flowers.四、根据下列单词首字母在字母表中的顺序，给单词排序，并将单词首字母大小写按顺序写在四线三格中。
fox nose pen orange map grape（）（）（）（）（）（）五、看图，填写合适的单词补全句子。
1.Look，this is a______.I like__________.2.Chen Jie likes________.That is an________.3.__________make me strong.This is a___________.六、看图，判断句子描述与图片是（T）否（F）相符。
()1.Bananas are long and fresh.Monkey like them.()2.Grapes are small.Elephant like grapes.()3.Apples are big and sweet.Monkey like them.()4.Oranges are juicy and nice.Birds like them.七、读他们的对话，完成相关任务。
任务一：选择合适的选项，补全对话。
Qiqi:Hi，Duoduo.What fruit do you like?Duoduo:1.___________ A.Do you like grapes?Qiqi:Do you like oranges? B.I like apples.Duoduo:2.___________ C.Not really.I don't like oranges Qiqi:3.___________Duoduo:Yes,I do.任务二：根据对话内容可知，应该给Duoduo准备的水果是_______A. B.Unit4Plants around us B同步练习一、听录音，选择你所听到的单词。
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第一单元两、三位乘一位数
1
课 题 练习三（1） 课型
练习
教 具
教材、PPT、白板等
授课
时 间
教学目标
1．通过练习，使学生进一步理解和掌握两、三位数乘一位数（连续进位）的笔算方法并能
正确地进行计算。
2．通过不同题型，引导学生理解算理，掌握算法。
3．能够运用所学知识解决实际问题，提高解决问题的能力。
4．培养学生学习数学的兴趣。
教学重点
理解连续进位的算理，掌握计算方法。
教学难点
理解连续进位的算理。
教学策略
教 学 过 程
个性修改
教
学
过
程
一、复习导入
1.口算练习（练习三第1题）
6×7+4＝ 2×8+6＝ 7×9+5＝
5×5+3＝ 3×9+7＝ 8×6+4＝
2.提问：两三位数乘一位数连续进位的乘法计算顺序是什么？在竖式计
算时需要注意什么？
二、分层练习，巩固提高
1.练习三第2题。
43×8＝ 7×44＝ 39×5＝ 75×6＝
3×284＝ 9×263＝ 6×724＝ 355×8＝
2.练习三第3题。
（1）出示题目中条件，让学生自主提出问题。
小云有5本相册，每本96张照片；小兰有4本相册，每本126张照片。
3.练习三第4题。
（1）出示情景图，让学生观察，说说你获取到了哪些信息？你打算怎
样解答这道题？先算什么？再算什么？
4.练习三第5题。
（1）出示情景图，让学生观察，说说你获取到了哪些信息？你打算怎
样解答这道题？先算什么？再算什么？
（2）学生独立解答，指名回答，集体订正。
5.对比练习（练习三第6题）。
13×3＝ 2×14＝ 24×2＝
16×3＝ 4×14＝ 24×3＝
先让学生观察每组中上下两道题，说一说有什么不同？你是如何发现
的？再动手计算。
三、全课小结
通过本节课学生，你获得哪些解决问题的经验？
第一单元两、三位乘一位数
2
教
学
过
程
教 学 过 程 个性修改
四、作业设计
练习册第11页：1,2,3,4,（第4题选做）
课堂
练习
练习三
板书
设计
练习三（1）
教学
反思
第一单元两、三位乘一位数
3