初一每日一题

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初一数学——线段上的动点问题

初一必做每日一题——线段上的动点问题【南京名校期末考试数学高频考点】线段上的动点问题1. 一中2016年期末考试：第26题，线段上的动点问题与中点知识相结合；2. 二十九中2016年期末考试：第25题，长方形上的两个动点进行讨论。

【典型例题】（一中2016年期末考试）26．如图，C 是线段AB 上一点，16AB cm =，6BC cm =. （1）AC = cm ；（2）动点P 、Q 分别从A 、B 同时出发，点P 以2/cm s 的速度沿AB 向右运动，终点为B ；点Q 以1/cm s 的速度沿BA 向左运动，终点为A .当一个点到达终点时，另一个点也随之停止运动.求运动多少秒时，C 、P 、Q 三点中，有一点恰好是以另两点为端点的线段的中点？【学霸易错点】1. 没意识到有一点恰好是以另两点为端点的线段的中点是一个分类讨论问题。

2. 对题干中信息的理解不透彻，强调了当一个点到达终点时，另一个点也随之停止运动，所以不会有来回运动。

3. 对于线段上的动点表示方法不明确，其实本质上是将动点的表达式转化为线段的表达式。

【破解要诀】1. 将线段上的动点用代数式的方法进行表示，明确起点，移动方向，移动速度等关键信息即可。

2. 根据中点的性质来表示中点关系，再将代数式代入中点关系即可求出时间。

3. 分类讨论一定要完全，每种情况都要考虑到，才能保证答案的准确性。

4. 线段的知识掌握的不是很好的话，其实也可以通过之前学过的数轴上的动点问题的方法来解决该题。

（第26题）答案【典型例题】（一中2016年期末考试）26．如图，C 是线段AB 上一点，16AB cm =，6BC cm =. （1）AC = cm ；（2）动点P 、Q 分别从A 、B 同时出发，点P 以2/cm s 的速度沿AB 向右运动，终点为B ；点Q 以1/cm s 的速度沿BA 向左运动，终点为A .当一个点到达终点时，另一个点也随之停止运动.求运动多少秒时，C 、P 、Q 三点中，有一点恰好是以另两点为端点的线段的中点？【分析】（1）根据线段的和差即可解出答案。

初一数学每日一题

初一数学每日一题1、如果规定向东为正，那么向西即为负．汽车向东行驶3千米记作3千米，向西行驶2千米应记作千米．考点：正数和负数．（2013•乐山中考题）分析：首先审清题意，明确“正”和“负”所表示的意义；再根据题意作答．解答：解：汽车向东行驶3千米记作3千米，向西行驶2千米应记作﹣2千米．故答案为：﹣2．点评：此题主要考查了正负数的意义，解题关键是理解“正”和“负”的相对性，明确什么是一对具有相反意义的量．在一对具有相反意义的量中，先规定其中一个为正，则另一个就用负表示．2、（2010•长宁区二模）最小的素数是考点：有理数．分析：素数就是质数，比如2、3、5、7、13、17，这种数只有1和他本身两个因数．解答：解：最小的素数是2．故答案为：2．点评：正确理解素数的概念是关键．4、（中考题）在2，﹣2，8，6这四个数中，互为相反数的是（）A．﹣2与2 B．2与8 C．﹣2与6 D．6与8考点：相反数． 42013•义乌中考题分析：根据相反数的概念解答即可．解答：解：2，﹣2是互为相反数，故选：A．点评：本题考查了相反数的意义，一个数的相反数就是在这个数前面添上“﹣”号；一个正数的相反数是负数，一个负数的相反数是正数，0的相反数是0．6、已知|2﹣b|与|a﹣b+4|互为相反数，求ab﹣2007的值．初一数学每日一题12题：12题答案：每日一题13：答案来啦！是D啊初一数学每日一题14题，题目如下：孩纸们太聪明了，爱你们，一起加油啊！每日一题15：每日一题15答案揭晓：在数轴上，与表示数－1的点的距离等于5的点表示的数为（）。

A、4B、6C、±5D、4或-6解析：正确答案为：D如果这个点在-1的右边，则这个点是4，如果这个点在-1的左边，则这个点是-6，所以选择D。

同学们，你们答对了么？每日一题16：如果｜x｜=3,｜y｜=2，且x+y>0，那么x-y的值为（）A、5或1B、1或-1C、5或-5D、-5或-1每日一题16答案揭晓：如果｜x｜=3,｜y｜=2，且x+y>0，那么x-y的值为（）A、5或1B、1或-1C、5或-5D、-5或-1解析：正确答案为：Ax=±3，y=±2.又因为x+y>0，所以，x=3,y=2或者x=3,y=-2，所以，x-y=1或者x-y=5.每日一题17：已知胜利企业第一季度盈利26000元，第二季度亏本3000元，该企业上半年盈利（或亏本）可用算式表示为（）A、（+26000）+（+3000）B、（-26000）+（+3000）C、（-26000）+（-3000）D、（+26000）+（-3000）每日一题17正确答案揭晓：已知胜利企业第一季度盈利26000元，第二季度亏本3000元，该企业上半年盈利（或亏本）可用算式表示为（）A、（+26000）+（+3000）B、（-26000）+（+3000）C、（-26000）+（-3000）D、（+26000）+（-3000）正确答案为：D解析：盈利用“+” 表示，亏本用“—”表示，则上半年的经营情况为盈利和亏本的总和，即表示为（+26000）+（-3000）.每日一题18：下面是小华做的数学作业，其中算式正确的是（）①0-(+4/7)=4/7 ②0-(-7又1/4)=7又1/4③(+1/5)-0=-1/5 ④(-1/5)+0=-1/5A、①②B、①③C、①④D、②④每日一题18正确答案揭晓：下面是小华做的数学作业，其中算式正确的是（）①0-(+4/7)=4/7 ②0-(-7又1/4)=7又1/4③(+1/5)-0=-1/5 ④(-1/5)+0=-1/5A、①②B、①③C、①④D、②④正确答案为：D解析：第一三小题数的符号错误，第二四小题正确，选择D。

四川省射洪县射洪中学七年级语文知识每日一练7.

四川省射洪县射洪中学七年级语文知识每日一练7第Ⅰ卷（选择题共33分）本卷共11小题，每小题3分，共33分。

在每小题给出的四个选项中，只有一项符合题目要求。

一、（24分，每小题3分）1、下列词语中加点字的注音，全都正确的一项是( )A、碣石(jié) 栖息(xī) 猝然(zù) 丰硕(shuò)B、贮蓄(zhù) 水藻(zǎo) 连亘(gèng) 发髻(jì)C、竦峙(zhì) 泯灭(mǐng) 枯涸(hé) 着落(zhuó)D、潜伏(qián) 收敛(liǎn) 酝酿(niàng) 禀告(bǐng)2、下列词语中书写有误的一项是( )A、功勋崩塌苦熬繁弦急管B、征兆扼运扒窃小心翼翼C、金窖静谧萧瑟闲情逸致D、蹂躏弘毅清洌险象迭生3、下列句子中加点词语使用不恰当的一项是( )A、伟大的女科学家居里夫人忘我的工作精神给人们留下了不可磨灭的影响。

B、在得失之患中，人们往往会迷失了自我。

C、“非典”隔离区内外，亲人间的可望不可即是一件多么痛苦的事情。

D、小李同学上课老喜欢“开小差”，在同桌的一再提醒下终于浪子回头了。

4、下列句子中没有语病的一项是( )A、能否根治网吧“顽症”是保证青少年健康成长的条件之一。

B、为了防止禽流感疫情不再反弹，市政府要求防疫部门进一步强大管理力度，制定出严密的防范措施。

C、五岁的小侄子戴着大檐帽，别着玩具枪，煞有介事地在房间里巡视，那模样真是让人忍俊不禁。

D、通过这次上岗前的集中培训，使他们的专业技能得到了很大的提升。

5、依次填入下面文字横线上的词语，最恰当的一项是( )又过端午节，的芦苇带着的水汽，电视里传出的古韵，慈眉善目的外婆仿佛就在我的面前。

这甜而不腻的粽子，这的感觉永远都埋藏在心灵深处，无论岁月走过多少年，我们都会与外婆一起过端午节。

A、一春濡湿温暖芳香简淡高沽翠绿清香B、翠绿清香一春濡湿简淡高洁温暖芳香C、翠绿清香简淡高洁一春濡湿温暖芳香D、简淡高洁一春濡湿温暖芳香翠绿清香6、对课文理解不正确的一项是( )A、《贝壳》一文采用了先抑后扬的手法，由贝壳联想到自己对待生命的态度，抒发了一种积极向上，乐观自信的精神，引起了读者的深思。

英语每日一练习题初一

英语每日一练习题初一一、词汇练习1. 根据所给的英文释义，写出对应的单词。

- A word that means "very small" is _______.- The past tense of "go" is _______.- Something you can wear to keep your feet warm is called _______.2. 选择正确的单词填空。

- I usually _______ (read / reads) books in the evening. - My mother _______ (teach / teaches) me how to cook.3. 用括号中所给单词的适当形式填空。

- She is _______ (good) at playing the piano than her brother.- The _______ (run) in the park is very popular among the students.二、语法练习1. 用正确的时态填空。

- I _______ (have) breakfast at 7:00 every morning.- They _______ (watch) a movie last night.2. 选择正确的选项完成句子。

- What _______ you _______ (do / did) yesterday?- _______ (Who / Whom) is your favorite singer?3. 将下列句子改为一般疑问句，并给出肯定和否定回答。

- She likes playing basketball.- _______ _______ like playing basketball?- Yes, _______ _______. / No, _______ _______ _______.三、阅读理解Read the following passage and answer the questions.Tom is a middle school student. He likes playing basketball and reading books. His favorite subject is English because he thinks it's interesting. He has a pet dog named Max. Tom usually goes to school by bike and spends his free time with Max.1. What is Tom's favorite subject?2. How does Tom go to school?3. What does Tom usually do with his pet dog?四、完形填空Once upon a time, there was a boy named Jack. He lived in a small village. Jack was very _______ (41) (A. happy B. sad C. brave). One day, he decided to go on an adventure. He packed his bag and set off to find a treasure.The journey was long and _______ (42) (A. easy B. hard C. short). But Jack never gave up. He climbed mountains and crossed rivers. Finally, he found the treasure and became a _______ (43) (A. hero B. villain C. king).41. _______42. _______43. _______五、写作练习Write a short paragraph about your favorite hobby. Explainwhy you like it and what you do when you engage in this hobby.请注意，以上练习题适用于初一学生的英语水平，包含词汇、语法、阅读、完形填空和写作等不同部分，旨在全面提高学生的英语能力。

英语每日一练习题初一

英语每日一练习题初一一、单项选择1. — Can I help you?— ________.A. Yes, you canB. No, you can'tC. Yes, pleaseD. No, thank you2. There are many ________ on the desk.A. bookB. booksC. a bookD. the book3. — What's your favorite subject?— ________A. ScienceB. SciencesC. ScientistD. Science's二、完形填空Bob is a middle school student. He ________ (1) English very much. But he doesn't like ________ (2) math. Every morning, he ________ (3) to school bike. His teacher oftensays, "Practice makes ________ (4) ." Bob believes this, so he works hard at his lessons. He hopes to ________ (5) a good student one day.1. A. likes B. like C. liking D. liked2. A. to do B. doing C. do D. did3. A. go B. goes C. going D. went4. A. perfect B. perfection C. perfects D. perfectly5. A. be B. am C. is D. are三、阅读理解Tom is a 12yearold boy. He is in Class Two, Grade Seven. He likes playing basketball, but he doesn't like playing football. His favorite subject is science because he wants to be a scientist when he grows up. Tom has a good friend named Jim. They often play basketball together after school.1. How old is Tom?A. 11B. 12C. 13D. 142. Which class is Tom in?A. Class One, Grade SevenB. Class Two, Grade SevenC. Class Three, Grade SevenD. Class Four, Grade Seven3. What does Tom want to be when he grows up?A. A teacherB. A doctorC. A scientistD. A basketball player四、句型转换1. They often go to the library.（改为否定句）________ ________ to the library.2. She is reading a book now.（改为一般疑问句）________ ________ a book now?3. He can't speak English.（改为一般疑问句）________ he ________ English?五、单词拼写1. There are many b______ on the tree.2. My favorite s______ is music.3. The sun s______ in the east and sets in the west.4. We should c______ our homework every day.5. He is l______ the football match.六、词组搭配1. Complete the following sentences with the correct form of the given words.A. I usually ________ (get up) at 6:30 in the morning.B. Don't ________ (be) late for school again.C. He ________ (not finish) his homework yet.D. We ________ (go) to the zoo last weekend.2. Match the following words with their correct meanings.A. hob ___________ 1. something you like to do in your free timeB. talent ___________ 2. a place where you can borrow booksC. library ___________ 3. a special skill or ability七、动词时态A. She ________ (watch) a movie last night.B. They ________ (visit) their grandparents next week.C. We ________ (do) our homework after dinner.D. He ________ (not go) to the party because he was sick.2. Fill in the blanks with the correct form of the verb.A. Look! The cat ________ (jump) off the table.B. My mother ________ (cook) dinner when I got home.C. They ________ (not see) each other for a long time.D. I ________ (be) to Beijing twice.八、名词复数Write the plural form of the following nouns.1. cat ________2. box ________3. child ________4. tooth ________5. foot ________九、连词成句1. to go, he, the store, wants, to, buy, some, books________________________________2. is, the, sunny, today, sky________________________________3. you, can, help, me, please, with, my, math, homework ________________________________十、情景交际Complete the dialogues with the appropriate expressions.1. A: Would you like some tea?B: ________ _______, thank you.2. A: How old are you?B: ________ _______, I'm twelve.3. A: What's the weather like today?B: ________ _______, it's sunny.答案一、单项选择1. C2. B3. A二、完形填空1. A2. C3. B4. A5. A三、阅读理解1. B2. B3. C四、句型转换1. They don't often go to the library.2. Is she reading a book now?3. Can he speak English?五、单词拼写1. books2. subject3. rises4. clean5. watching六、词组搭配1. A. get upB. beC. hasn't finishedD. went2. A. 1B. 3C. 2七、动词时态1. A. watchedB. will visitC. doD. didn't go2. A. is jumpingB. was cookingC. haven't seenD. have been八、名词复数1. cats2. boxes3. children4. teeth5. feet九、连词成句1. He wants to go to the store to buy some books.2. The sky is sunny today.3. Can you please help me with my math homework?十、情景交际1. A: Would you like some tea?B: Yes, please, thank you.2. A: How old are you?B: I'm twelve, thank you.3. A: What's the weather like today?B: It's sunny.。

英语每日一练习题初一

英语每日一练习题初一1. 完成下列句子，用正确的形式填空。

A: What _______ your name?B: My name _______ Alice.2. 选择正确的答案填空：I _______ (am/are/is) a student.3. 选择合适的词填空：Tom and Jerry are _______ (children/child).4. 根据图片选择正确的单词填空：The picture shows a _______ (cat/dog).5. 将下列句子改为否定句：They play football in the park.6. 将下列句子改为一般疑问句：You are a doctor.7. 根据对话选择正确的答案：A: _______ do you go to school?B: I go to school by bus.8. 根据对话填空：A: _______ is your birthday?B: My birthday is in July.9. 翻译下列句子：我喜欢吃水果。

10. 连线题：将感叹词与相应的图片连线。

11. 根据短文填空：Mike _______ (like/likes) playing basketball. He _______ (is/am) a good player. _______ (He/She) often plays basketball with his friends after school.12. 简答题：用英语回答问题。

What's your favorite color?13. 阅读理解：阅读短文，选择正确的答案。

Tom likes to eat apples. He eats one apple every day. He also likes bananas and oranges. Tom's favorite fruit is grapes. He thinks they're delicious. He eats grapes for dessert every day. Tom doesn't like pears or watermelons. He thinks they're not tasty.根据短文，回答以下问题：- What fruit does Tom eat every day?- What is Tom's favorite fruit?- What fruits does Tom not like?14. 翻译句子：我每天都骑自行车去学校。

(完整word)初一每日一练

初一语文每日一练1．给加点字注音或根据拼音写出汉字。

憎恶．( ) 惧惮．( ) 粗拙．( ) 哀悼．( ) 震悚．( )chuāng()疤孤shuāng() jié()问pī()雳渴mù()2．下列句中加点的词语解释有误的一项是( )A．我大吃一惊之后，也就忽而记得，这就是所谓福橘，元旦辟头．．的磨难，总算已经受完，可以下床玩耍去了。

(开头)B．最讨厌的是常喜欢切切察察．．．．。

(拟声词，形容细碎的说话声)C．我似乎遇着了一个霹雳，全体．．都震悚起来。

(大家)D．我惧惮．她什么呢！(害怕)3．下列句子中没有错别字的一项是( )A．总之：都是些烦琐之致，至今想起来还觉得非常麻烦的事情。

B．夜间的伸开手脚，占领全床，那当然是情由可原的了，倒应该我退让。

C．饭粒落在地上，必须拣起来，最好是吃下去；晒裤子用的竹竿底下，是万不可钻过去的……。

D．虽然背地里说人长短不是好事情，但淌使要我说句真心话，我可只得说：我实在不大佩服她。

4．根据以下三则材料，说说你的见解。

材料一：一般从高速公路下来的时候，都会有一段弯路。

这是为什么呢？高速路上车速太快，再怎么给你减速标志，甚至给你画骷髅头都是没有用的。

所以，设计高速公路的人的想法很简单，给你设计一个大弯，你想不减速都不行。

材料二：最好的领导，对于底下的员工，不用讲，不用骂，但是会制定出一种制度，让你乖乖地去做。

会领导的人就是这样，不着边际，没有任何警示，但是，他会造成那种形势。

材料三：顶尖的领导者领导员工的思维，普通的领导者看管员工的行为。

____________________________________________________________________________________________ ____________________________________________________________________________________________蒋堂①初为淮南转运使②，冬至日，各县致贺书，皆投书即还。

初一英语每日一练6.6-6.10(可编辑修改word版)

6 月6 日一、单项选择( ) 1. —Can you sing?—Yes, I can sing .A. goodB.wellC. niceD. many ( ) 2. Who can play guitar in your school?A. aB. theC. anD. /( ) 3. —can you do?—I can paint.A. WhenB. WhereC. WhoD. What ( ) 4. —she speak English?—No, she can’t. She is a Chinese.A.DoesB. CanC. DoD. Is( ) 5. They would like to school by car.A. goB. to goC. goingD. are going( ) 6. —do you think of the movie?—It’s boring. I don’t like it.A. WhatB. WhyC. HowD. Where( ) 7. Tom’s father enjoys English songs.A. listen toB. to listenC. listening toD. to listen to ( ) 8. Why the teacher him in the classroom after school every day?A. does; make; stayB. does; let; to stayC. do; make; stayD. do; makes; to stay( ) 9. Can you help my brother his English?A. onB. withC.inD. for( ) 10. Don’t TV. TV is kind of boring.A. watch; WatchB. watch; WatchingC. watching; WatchingD. watches; Watches( ) 11. What happening?A. doesB. isC. doD. has( ) 12. Some people like to stay at home, but like to go to the cinema.A. anotherB. otherC. othersD. other one( ) 13. smoke here, dad.A. Don’t beB. Don’tC.Not to beD. be not( ) 14. My father promises a computer for me.A. buyB. buysC. buyingD. to buy( ) 15. Daming is always ready others.A. helpingB. helpC. to helpD. helps二、完形填空I work in a small shop. It's near an English 1 . Every day students come to 2 things. In the morning, I get up 3 six, and then I have breakfast. I go to 4 by bike. I 5 to the shop at about six fifty. The shop 6 at seven. We sell things 7 food and drink. We have school things, too, so there 8 often many people in ourshop 9 morning to evening. I have 10 in the shop. At seven in the evening the shop is closed. All of us go home for supper.( ) 1. A. farm B. factory C. school D. river( ) 2. A. buy B. sell C. take D. want( ) 3. A. on B. in C. at D. from( ) 4. A. school B. bed C. class D. work( ) 5. A. go B. get C. stay D. look( ) 6. A. opens B. open C. is opening D. is open( ) 7. A. with B. like C. for D. about( ) 8. A. are B. have C. see D. come( ) 9. A. in B. on C. at D. from( ) 10. A. supper B. breakfast C. tea D. Lunch6 月7 日三、阅读理解AWhen you are learning English, you find it not clever to put an English sentenceword for word into your own language. Take the sentence “How do you do?” as an example. If you look up each word in the dictionary, one at a time, what is your translation? It must be a wrong sentence in your own language.Languages do not just have differ ent sounds, they are different in many ways. It’s important to master the rules for word order(顺序) in the study of English, too. If the speakers put words in a wrong order, the listener can’t understand the speaker’s sentence easily. Sometimes when the order of words in an English sentence is changed, the meaning of the sentence changes. But sometimes the order is changed, the meaning of the sentence doesn’t change. Let’s see the difference between the two sentences.“She only likes apples.” “Only she likes apples.” “I have seen the film already.” “I have already seen the film.” When you are learning English, you must do your best to get the spirit of the language and use it as the English speakers does. ( ) 1. From the passage, we know that when we are learning English.A.we shouldn’t put every word into own languageB.we should look up every word in the dictionaryC.we need to put every word into our own languageD.we must read word by word( ) 2. The writer thinks it is in learning English.A.difficult to understand different soundsB.possible to remember the word orderC.important to master the rules in different waysD.easy to master the rules for word order( ) 3. We can learn from the passage that .A.the meaning of an English sentence always changes with the order of the wordsB.the order of words can never change the meaning of an English sentenceC.Sometimes different order of words has a different meaningD.if the order of words is different, the meaning of the sentence must be different ( ) 4. “She only likes apples.”.A.is the same as “Only she likes apples.”B.is different from “Only she likes apples.”C.means “She likes fruit except apples.”D.means “She doesn’t like apples.”( ) 5. Which is the best title for this passage?A. Different Orders, Different MeaningsB. How to Speak EnglishC. How to Put English into Our Own LanguageD. How to Learn EnglishBAmerican boys and girls love to watch TV. Some children spend six hours a day in school and four to six hours a day in front of the TV set. Some even watch TV for eight hours or more on Saturdays.TVs are like books or films. A child can learn bad things and good things from them. Some programmers help children to understand the news, others show people and places from other countries or other time in history. With TV a child does not have to go to the zoo to see animals or to the ocean to see a ship. Boys and girls can see a play, a concert or a game at home. TV brings many places and events into our homes. Some programmers show crime and other things that are bad for children, so parents sometimes help them to find other interesting things to do.( ) 6. Some children spend eight hours or more .A. studyingB. playing gamesC. watching TVD. helping their parents ( ) 7. On TV children can see .A. gamesB. big animalsC. oceansD. almost everything( ) 8. Children usually spend a day in school.A. six hoursB. more than eight hoursC. only a few hoursD. four hours ( ) 9. “TV brings places and events into our homes” means “”. makes things happen in homesB.We can know places and events without going to see themC.We can see houses and building on TVD.We can find them easily( ) 10. Parents sometimes help their children find other things to do when there is for children.A. a bad programB. an animalC. a gameD. a play6 月8 日CIn Britain, cars, buses and bikes must keep to the left side of the street. If a personwants to cross a street, he must be very careful. Before he crosses a street,he has to stop and look to the right first and then the left. While in China we look to the left instead. When visitors are in London, they should learn how to take buses and underground trains. The most important of all, they must know in which direction they are going and which bus and which understand train they should take. At the bus stop they should wait for their buses to come. As soon as they get on a bus, they must pay for their fares.根据短文内容，判断下列句子正（T）误（F）( ) 11.In England, people go alone the left side of the street as we do in China.( ) 12.When they want to cross a street, people in England do not look to the left first. ( ) 13.Visitors in London should learn to drive buses.( ) 14.When they take a bus in England, visitors must make sure in which direction it is going.( ) 15.After they get on a bus, visitors don’t have to pay for their tickets at once.四、根据音标写单词1. [pi'ænəu]2. [bɔ:d]3. ['wʌri]4. ['prɔmis]5. ['mɔnitə]6. ['evri,bədi]7. ['bju:tiful] 8. ['taidi] 9. [skɔ:]10. [dʒʌst]五、英汉短语互译1.打乒乓球2.与某人相处融洽3.弹钢琴4.放风筝5.乐于做某事6. worry about7. be good at 8. just like9. would like to do 10. That’s all六、句型转换1.She can sing and dance.(就画线部分提问)she ?2.I think she can play basketball well. (改为否定句)3.I can get on well with everyone. (就画线部分提问)you get on with everyone?4.They are talking about the film star. (就画线部分提问)they ?5.I’d like to join the Music Club because I can play the piano. (就画线部分提问)like to join the Music Club?6 月9 日七、句子翻译1.我和每个人相处的都很好，无论同学还是老师。

藻类植物-学易试题君之每日一题君2019学年上学期七年级生物人教版

1
考试频度：★★★☆☆ 难易程度：★★☆☆☆
下列关于藻类植物的叙述，不正确的是
A ．水中的藻类植物几乎全身都能吸收水和无机盐
B ．水中的藻类植物几乎全身都能进行光合作用
C ．没有专门的吸收、运输器官
D ．海带是大型的藻类植物，具有根、茎、叶
【参考答案】D
【试题解析】藻类植物没有专门的吸收、运输器官，几乎全身都能吸收水分和无机盐，AC 正确；藻类植物细胞内有叶绿体，全身都能进行光合作用，释放氧气，是空气中氧气的重要来源，B 正确；藻类植物的结构简单，无根、茎、叶的分化，D 错误。

1．下列关于藻类植物的叙述，不正确的是
A ．植物体是单细胞或多细胞的
B ．大都生活在水中
C ．有些藻类有茎、叶的分化
D ．细胞内含有叶绿素
2．下列有关藻类植物的描述中，错误的是
A ．藻类植物有多细胞的，也有单细胞的
B ．藻类植物依靠孢子繁殖
C ．藻类植物有茎、叶的分化，具有假根
D ．藻类植物大多生活在水中
3．“日出江花红胜火，春来江水绿如蓝”江水泛起的绿色，是因为以下哪种植物大量繁殖的结果
A ．藻类植物
B ．蕨类植物
C ．种子植物
D ．苔藓植物。

初一数学冲刺期中每日一练(10)(带答案)

4.12初一数学冲刺期中每日一练1．如图，△ABC，∠ABC、∠ACB的三等分线交于点E、D，若∠BFC＝132°，∠BGC＝118°，则∠A的度数为（）A．65°B．66°C．70°D．78°2．已知a＝+2015，b＝+2016，c＝+2017，则代数式2（a2+b2+c2﹣ab﹣bc﹣ac）的值是．3．如图，将一张长方形纸片与一张直角三角形纸片（∠EFG＝90°）按如图所示的位置摆放，使直角三角形纸片的一个顶点E恰好落在长方形纸片的一边AB上，已知∠BEF＝21°，则∠CMF＝．4．已知如图，四边形ABCD中∠BAD＝α，∠BCD＝β，BE、DF分别平分四边形的外角∠MBC和∠NDC（1）如图1，若α+β＝150°，则∠MBC+∠NDC＝度；（2）如图1，若BE与DF相交于点G，∠BGD＝45°，请求出α、β所满足的等量关系式；（3）如图2，若α＝β，判断BE、DF的位置关系，并说明理由．参考答案与试题解析一．选择题（共1小题）1．如图，△ABC，∠ABC、∠ACB的三等分线交于点E、D，若∠BFC＝132°，∠BGC＝118°，则∠A的度数为（）A．65°B．66°C．70°D．78°【分析】先根据三等份角得出结论，再利用三角形的内角和列出方程，两方程相加即可求出∠ABC+∠ACB即可．【解答】解：∵∠ABC、∠ACB的三等分线交于点E、D，∴∠CBG＝∠EBG＝∠ABE＝∠ABC，∠BCF＝∠ECF＝∠ACE＝∠ACB，在△BCG中，∠BGC＝118°，∴∠CBG+∠BCE＝180°﹣∠BGC，∴∠CBG+∠2∠BCF＝62°①在△BCF中，∠BFC＝132°，∴∠BCF+∠CBF＝180°﹣∠BFC，∴∠BCF+2∠CBG＝48°②，①+②得，3∠BCF+3∠CBG＝110°，∴∠A＝180°﹣（∠BCF+∠CBG）＝70°，故选：C．【点评】本题考查的是三角形内角和定理，求角的度数常常要用到“三角形的内角和是180°这一隐含的条件．用方程的思想解几何问题．二．填空题（共2小题）2．已知a＝+2015，b＝+2016，c＝+2017，则代数式2（a2+b2+c2﹣ab﹣bc﹣ac）的值是6．【分析】先求出a﹣b＝1，b﹣c＝1，c﹣a＝2，再化简2（a2+b2+c2﹣ab﹣bc﹣ac）＝（a ﹣b）2+（b﹣c）2+（c﹣a）2代值即可得出结论．【解答】解：∵a＝+2015，b＝+2016，c＝+2017，∴a﹣b＝﹣1，b﹣c＝1，c﹣a＝2，∴2（a2+b2+c2﹣ab﹣bc﹣ac）＝a2﹣2ab+b2+b2﹣2bc+c2+a2﹣2ac+c2＝（a﹣b）2+（b﹣c）2+（c﹣a）2＝1+1+4＝6故答案为6．【点评】此题主要考查了完全平方公式，求出a﹣b＝b﹣c＝1，c﹣a＝2是解本题的关键．3．如图，将一张长方形纸片与一张直角三角形纸片（∠EFG＝90°）按如图所示的位置摆放，使直角三角形纸片的一个顶点E恰好落在长方形纸片的一边AB上，已知∠BEF＝21°，则∠CMF＝69°．【分析】先延长MF交AB于H，得出∠EFG＝90°，再根据三角形外角性质，求得∠BHF 的度数，最后根据平行线的性质，求得∠CMF的度数．【解答】解：延长MF交AB于H，则∠EFG＝90°∵∠BEF＝21°∴∠BHF＝90°+21°＝111°∵CD∥AB∴∠CNF＝180°﹣∠BHF＝180°﹣111°＝69°故答案为：69°【点评】本题主要考查了平行线的性质，三角形的外角性质，解决问题的关键是作辅助线构造直角三角形．三．解答题（共1小题）4．已知如图，四边形ABCD中∠BAD＝α，∠BCD＝β，BE、DF分别平分四边形的外角∠MBC和∠NDC（1）如图1，若α+β＝150°，则∠MBC+∠NDC＝150度；（2）如图1，若BE与DF相交于点G，∠BGD＝45°，请求出α、β所满足的等量关系式；（3）如图2，若α＝β，判断BE、DF的位置关系，并说明理由．【分析】（1）利用角平分线的定义和四边形的内角和以及α+β＝150°推导即可；（2）利用角平分线的定义和四边形的内角和以及三角形的内角和转化即可；（3）利用角平分线的定义和四边形的内角和以及三角形的外角的性质计算即可．【解答】解：（1）在四边形ABCD中，∠BAD+∠ABC+∠BCD+∠ADC＝360°，∴∠ABC+∠ADC＝360°﹣（α+β），∵∠MBC+∠ABC＝180°，∠NDC+∠ADC＝180°∴∠MBC+∠NDC＝180°﹣∠ABC+180°﹣∠ADC＝360°﹣（∠ABC+∠ADC）＝360°﹣[360°﹣（α+β）]＝α+β，∵α+β＝150°，∴∠MBC+∠NDC＝150°；（2）β﹣α＝90°理由：如图1，连接BD，由（1）有，∠MBC+∠NDC＝α+β，∵BE、DF分别平分四边形的外角∠MBC和∠NDC，∴∠CBG＝∠MBC，∠CDG＝∠NDC，∴∠CBG+∠CDG＝∠MBC+∠NDC＝（∠MBC+∠NDC）＝（α+β），在△BCD中，∠BDC+∠CDB＝180°﹣∠BCD＝180°﹣β，在△BDG中，∠BGD＝45°，∴∠GBD+∠GDB+∠BGD＝180°，∴∠CBG+∠CBD+∠CDG+∠BDC+∠BGD＝180°，∴（∠CBG+∠CDG）+（∠BDC+∠CDB）+∠BGD＝180°，∴（α+β）+180°﹣β+45°＝180°，∴β﹣α＝90°；（3）平行，理由：如图2，延长BC交DF于H，由（1）有，∠MBC+∠NDC＝α+β，∵BE、DF分别平分四边形的外角∠MBC和∠NDC，∴∠CBE＝∠MBC，∠CDH＝∠NDC，∴∠CBE+∠CDH＝∠MBC+∠NDC＝（∠MBC+∠NDC）＝（α+β），∵∠BCD＝∠CDH+∠DHB，∴∠CDH＝∠BCD﹣∠DHB＝β﹣∠DHB，∴∠CBE+β﹣∠DHB＝（α+β），∵α＝β，∴∠CBE+β﹣∠DHB＝（β+β）＝β，∴∠CBE＝∠DHB，∴BE∥DF．故答案为：150．【点评】此题是三角形综合题，主要考查了平角的意义，四边形的内角和，三角形内角和，三角形的外角的性质，角平分线的意义，用整体代换的思想是解本题的关键，整体思想是初中阶段的一种重要思想，要多加强训练．。

初一每日一练第九天-数学-绝对值的几何意义

二.典型例题：【例题 1】（18 建邺期中）阅读下面材料：
在数轴上 5 与-2 所对的两点之间的距离： 5 2 7 ；
在数轴上-2 与 3 所对的两点之间的距离： 2 3 5 ；
在数轴上-8 与-5 所对的两点之间的距离： 8 5 3 ；
在数轴上点 A、B 分别表示数 a、b，则 A、B 两点之间的距离 AB a b b a 回答下列问题：（1）数轴上表示-2 和-5 的两点之间的距离是____________；
初一数学易错点：绝对值的几何意义
一.考点分析：知识点：绝对值的几何意义在月考和期中考试都是重难点，往往以中档题的难度出现。要
求学生能够用绝对值的几何意义求解最值问题。绝对值的定义即是绝对值的几何意义，利用绝对值可以表示数轴上两点之间的距离，因此当我们看到“数轴上的距离”要想到可以用“绝对值”来表示，反过来，当一个绝对值式子出现时，它也代表着距离。考查内容：绝对值的几何意义（定义）：数轴上表示一个数的点到原点的距离。易错点：能否掌握用几何语言翻译式子的能力。解题方法：几何意义+奇点偶段
三.练习巩固：
1. （18 雨花台月考）大家知道|2|＝|2﹣0|，它在数轴上的意义是表示 2 的点与原点（即表示
0 的点）之间的距离，又如式子|6﹣3|，它在数轴上的意义是表示 6 的点与表示 3 的点之
间的距离。
（1）式子|4+5|在数轴上的意义是
。
（2）数轴上数 x 和﹣1 的两点 A 和 B 之间的距离可以表示为
取得的值最小。所以相应的 x 的取值范围是﹣1≤x≤2 故而答案为：﹣1≤x≤2 （4）|DE|＝|8﹣（﹣8）|＝16 若点 P 到点 D 和到点 E 的距离之差大于 1 而小于 5，则点 P 在﹣8 到 8 之间，即﹣8≤x≤8； ∴有 1＜||x+8|﹣|x﹣8||＜5 解得﹣2.5＜x＜﹣0.5 或 0.5＜x＜2.5 ∴满足要求的所有的点 P 表示的整数是：﹣2，﹣1，1，2

七年级下册数学每日一练

每日一练（1）时间10~15min 总分100 出题人: T班级___________ 姓名__________ 得分_________一、选择题：1.下列说法正确的是（）A. 3是9的算术平方根B. -2是4的算术平方根C.（-2）²的算术平方根是-2D. -9的算术平方根是3 2.与51+最接近的整数是（）A. 4B. 3C. 2D. 1 二、填空题：3.①64的算术平方根是______；②412的算术平方根是______.4.已知a 的算是平方根是3，b 的算术平方根是4，则b a +的算术平方根是_________. 三、解答题：5.规律探究：（1）求222220,)32(,)21(,)2(,3--的值；（2）对于任意数a ，探究2a 等于多少？（3）根据（2）中的结论，则._________)21(2=-每日一练（2）时间10~15min 总分100 出题人: T班级___________ 姓名__________ 得分_________一、选择题：1.下列说法正确的是（）A. 9的平方根是±3，应表示为9²=±3B. ±3是9的平方根，应表示为±9=3C. 9开平方能得到9的平方根，应表示为9=3D.9的算术平方根是3，应表示为9=32.下列说法：①±5是25的平方根；②49的平方根是-7； ③8是16的算术平方根；④-3是9的平方根.其中正确的个数是（）A. 1B. 2C. 3D. 4 二、填空题： 3.972的平方根是_______；81的平方根是_________. 4.若a 的平方根等于a ，则a =___________.三、解答题： 5. 规律探究：（1）求22222)0(,)2549(,)94(,)9(,)4(的值；（2）对于任意数a ，探究2)(a 等于多少？（3）根据（2）中的结论，则._________)14.3(2=-π每日一练（3）时间10~15min 总分100 出题人: T班级___________ 姓名__________ 得分_________一、选择题：1.（-2）²的平方根是（）A. 2B. -2C. ±2D. 22.下列各式正确的是（） A.（±41）=21 B.211412= C.4324321694=+=+D. 671371322=-=-二、填空题： 3.已知577--+-=x x y ，则.__________=+y x4.若0910=++-y x ，则.__________=+y x三、解答题： 5.求下列各式中x 的值:（1）2252=x ；（2）049812=-x每日一练（4）时间10~15min 总分100 出题人: T班级___________ 姓名__________ 得分_________一、选择题：1.下列语句正确的是（）A. 负数没有立方根B. 8的立方根是±2C. 立方根等于它本身的数只有±1D. 3388-=-2.已知5848.02.0,260.1233≈≈，则3002.0的值约为（）A. 0.1260B. 0.0126C. 0.05848D. 5.848 二、填空题： 3.若8=x ，则._________3=-x4.比较37,5,2的大小，并用“<”号连接起来：______________.三、解答题：5.如果43+-b b a 为b a 3-的算术平方根，221+-a a 为21a -的立方根，求b a 32-的立方根.每日一练（5）时间10~15min 总分100 出题人: T班级___________ 姓名__________ 得分_________一、选择题：1.下列说法正确的是（）A. 无限小数都是无理数B. 带根号的数都是无理数C. 无限不循环小数都是无理数D.无理数都是开方开不尽的数2.下列各数： 131131113.0,8,14159.33-（每相邻两个3之间依次多一个1），71,25,--π中，无理数有（）A. 1个B. 2个C. 3个D. 4个二、填空题： 3.5-的绝对是_______；51-的相反数是_________.4.满足32<<-x 的整数x 有______________________.三、解答题：5.把下列各数填入相应的集合内：21-，3-，32，29，38--，0，π-， 1010010001.3（每相邻两个1之间依次多一个0）.有理数集合：{ …} 无理数集合：{ …} 整数集合： { …} 分数集合： { …} 负实数集合：{ …}绵阳中学育才学校初一数学组每日一练（22）时间10~15min 总分100出题人: T班级___________ 姓名__________ 得分_________一、选择题：1.已知2(2)30a b -++=，则(,)P a b --的坐标为（）A.（2，3）B.（2，-3）C.（-2，3）D.（-2，-3）2.已知点(,)P x y 在第四象限，且23,25x y ==，则P 点坐标是（）A.（-3，5）B.（5，-3）C.（3，-5）D.（-3，-5）二、填空题：3.若点(,)a b -在第二象限，则点2(,)a b -在第______象限，点(25,34)a b --在第____象限.4.已知点(3,2)P a a -+，若点P 在x 轴上，则a=______；若点P 在y 轴上，则a=______. 三、解答题：已知点M(3a -8,a -1)，分别根据下列条件求出点M 的坐标. （1）点M 在y 轴上；（2）点M 在第二、四象限的角平分线上；（3）点N(3，-6)，直线MN ∥x 轴.绵阳中学育才学校初一数学组每日一练（16）时间5~10min 总分100 出题人：T班级：_________ 姓名：_________ 得分：________ 一、选择题：1. 在45,3.14,03-0.57-4-0.10100100013π⋅⋅⋅，，，，，，，这些数中，有理数有（）A.3个B.4个C.5个D.6个2.如图,点E 在AC 的延长线上,给出下列条件:⑴∠1=∠2 ；⑵∠3= ∠4 ；⑶∠A=∠DCE ；⑷∠D=∠DCE ；⑸∠A+∠ABD=180°；⑹∠A+∠ACD=180°.其中能判断AC ‖BD 的条件的有( ).A 、⑴⑶⑹B 、⑴⑷C 、⑵⑸D 、⑵⑷⑸二、填空题：3. 2−√5的相反数是____________；绝对值是_____________.4.将直尺和三角板按如图方式摆放，已知∠1=30°，则∠2的大小是__________ 三、解答题：5.如图，已知DE ∥BC ，GF ⊥AB 于F ，∠1=∠2，判断CD 与AB 的位置关系，并说明理由.CA B DE1 2 34 1 2231AB CDEFG绵阳中学育才学校初一数学组每日一练（16）时间5~10min 总分100 出题人：T班级：_________ 姓名：_________ 得分：________ 一、选择题：1.若2=253a b a b =+，，则所有可能的值为（）A.8B.8或2C.8或-2D.±8或±2 2.如图，已知a b ∥，直角三角板的直角顶点在直线b 上，若∠1=60°，则下列结论错误的是（） A.∠2=60° B.∠3=60° C.∠4=120° D.∠5=40° 二、填空题：3.计算−22×(12)2+√−643÷|−2|=_____________4.如图，已知AB ∥DE ，∠ABC=70°，∠CDE=140°，则∠BCD 的度数为_____________ 三、解答题：5.如图，∠1+∠2=180°，∠3=∠B ，求证：∠AED=∠ACB.12 3 45abABCD E70°140°123 4 ABC D EF绵阳中学育才学校初一数学组每日一练（65）时间5~10min 总分100 出题人：T 班级：_________ 姓名：_________ 得分：________1.对于数对（a，b）、（c，d），定义：当且仅当a=c且b=d时，（a，b）=（c，d）；并定义其运算如下：（a，b）@（c，d）=（ac-bd，ad+bc），如（1,2）@（3,4）=（1×3-2×4,1×4+2×3）=（-3,10），若（x，y）@（1，-1）=（1,3），则y x的值是（）A.-1B.0C.1D.22.在平面直角坐标系中，点P（3a-8,4-a）在第二象限，且该点到x，y轴的距离相等，则a=__________________3.解下列不等式组：3(2)45131 2x xxx x-+<⎧⎪⎨--≥+⎪⎩4.某商场销售A，B两种品牌的教学设备，这两种教学设备的进价和售价如表所万元。

第08天百家争鸣-每日一题之2018快乐暑假七年级历史人教版

4．评价：大思想家、大教育家、____学派的创始人。
5．相关书籍：他的思想后来由其弟子整理成________一书。
三、百家争鸣
1．背景：____时期，旧的社会制度进一步崩溃，新的社会制度逐步确立。
2．主要派别及主张：
主要派别
代表人物
主要主张
（1）儒家
孟子
主张实行“______”，反对一切______的战争
3．相关书籍：老子的学说集中在________一书，该书成为道家的经典。
二、孔子和儒家学说
1．简介：______后期___国人，出身下层贵族。
2．思想：核心思想是“___”。主张________，反对苛政。认为统治者只有实行德政，社会才会稳定。
3．教育成就：创办________，主张“__________”；发现和总结出许多教育规律，提出一系列教学原则和方法；晚年精心整理古代重要的文献资料。
A．法治B．仁政C．兼爱D．非攻
1．B【解析】老子认为一切事物都有其对立面，对立的双方能够相互转化。老子是道家学派的创始人。
每日一题之2018快乐暑假七年级历史人教版
专题下载链接：/a766928.html
链接打开方法：
1、按住ctrl键单击链接即可打开专题链接
2、复制链接到网页
《国家中长期教育改革和发展规划纲要（2010—2020年）》提出要促进教育公平。我国古代思想家、教育家孔子的言行中最能体现促进教育公平的是学科.网
A．提出“仁者爱人”
B．提倡“为政以德”
C．提出学习要“温故而知新”
D．创办私学，广收门徒
儒家认为爱父母总要胜过爱其他一般的人，爱是有差等的。墨家则不然，它坚持爱别人和爱父母应当是同等的。这说明墨家主张
荀子

英语每日一练习题初一

英语每日一练习题初一一、词汇练习1. 根据题目所给的单词，选择正确的英文解释。

- 快乐：A) happy B) sad C) angry- 朋友：A) friend B) enemy C) family2. 将下列单词填入句子中，使其意义完整。

- 我有一个好朋友，他的名字叫做Tom。

（friend）- 我每天放学后都会去图书馆。

（library）二、语法练习1. 用正确的时态填空。

- I ___ (be) at school yesterday.- They ___ (go) to the park last weekend.2. 选择正确的词填空。

- My brother ___ (and/with) his friends are playing soccer.三、阅读理解阅读下面的短文，并回答问题。

Tom is a student. He goes to school every day. He likes toplay soccer with his friends after school. His favoritesubject is English because he enjoys speaking with hisfriends in English. Today, he is going to the library toborrow a new English book.问题：1. What does Tom like to do after school?2. What is Tom's favorite subject?四、完形填空阅读下面的短文，从括号内选择合适的选项填入空白处。

Tom is a good student. He ___ (A) always gets up early and goes to school on time. He ___ (B) likes to read books and play sports. His favorite sport is soccer. He ___ (C) plays soccer with his friends every day after school. He ___ (D) wants to be a soccer player when he grows up.(A) never(B) also(C) never(D) always五、翻译练习将下列句子从中文翻译成英文。

初一英语每日一练150题

初一英语每日一练150题1.Where was Uncle Sun yesterday?2.They are going to visit Mr。

Sun tomorrow.3.___.4.Where has Dick gone。

He went to the reading-room.5.Mark Twain is known as an American ___.6.I hope he will come to see me before he leaves here.7.___.8.I think she is reading right now.9.They are having a good time in the garden.10.The students see many birds there.11.His ___.22.Is everyone here today。

- Yes。

we are all present.23.Thank you very much。

- That's all right.24.Is Alice a doctor。

- No。

she isn't.25.The children are going to have a ___.26.Let'___.27.How is the weather?28.The girl's name is Taylor Swift。

Taylor is her first name.29.Mike and Ted are twins。

They are from Australia.31.This is my book。

(Note: n C is deleted as it is not a valid n for this n.)Note: Paragraph 30 is deleted as it contains formatting errors and the ns do not match the n.76."Mum。

初中数学每日一题

初中数学每日一题（2）换元法——求代数式的值我们已经学习了“整体代入法”求代
数式的值，然而并不是条件是比例式或等积式的时候，我们
可以设一个辅助未知数，代替原有的几个未知数或代数式——叫换元法，从而解决求值问题。
初中数学每日一题（3）配方法——求代数式的值求值问题中，我们经常会遇到两个以上
初中数学每日一题 (第一部分）
初中数学每日一题（1）整体代入——求代数式的值求代数式的值，是考查学生基本技能时最常见的题型，
因此在各级各类考试，如从周测到月考直至中考，几乎成为每考必考的题目类型。如果按照常规思路先求出字母取值，再代入求值，问题就会变得很难解决，那么就需要我们另辟蹊径，观察字母系数，寻找变化共性；通过类比转化，最后整体代入，从而找到解决问题的途径。
根据题目的特点和要求，分成若干类，转化成若干个小问题来解决，这种按不同情况分类，然后再逐一研究解决的数学思想，称之为分类讨论思想。
小结与反思：比较大小与绝对值的化简问题，关键在于找出临界点，将数轴分段，在每一段上比较或化简。
初中数学每日一题（8）分类讨论思想—解决图形不确定性问题
初中数学每日一题（17）配方法——解决二次函数性质有关问题
前面的学习中，我们已经渗透了 “配方法”求代数式的值，今天我们学习“配方法”求抛物线的对称轴、顶点、二次函数的增减性、最值.所以“配方法”是我们应该掌握的一种很重要的理科解题方法，在今后的学习中，还会经常用到。
在中考以及各类各级考试中，常会出现已知某方程解的情况，比如方程有解、无解、有增根、解是正或负数、解是整数等，求字母的取值或取值范围。此类题目考查意在考查学生思维的全面性和逆向思维能力。
（12）

初一英语每日一练150题

( ) 1. Where _______ Uncle Sun yesterday?A. wasB. wereC. didD. does( ) 2. They ______ going to visit Mr. Sun tomorrow.A. isB. areC. amD. be( ) 3. Some are ___ in the river and some are ___ games. A. swiming, playing B. swim, playingC. swimming, playingD. swimming, play( ) 4. Where is Dick? He _______ to the reading-room.A. has beenB. wentC. has goneD. goes( ) 5. Mark Twain, an American writer, _____ everybody here.A. knowsB. is known asC. is known toD. is known for( ) 6. I hope he will come to see me before he _____ here.A. leaveB. leavesC. will leaveD. left ( )7. My teacher told me that Australians _____ English.A. spokeB. speakC. speaksD. are speaking ( ) 8. I think she _______ right now.A. readingB. readsC. is readingD. read( ) 9. —— Where are the children?——They ______ a good time in the garden.A. are havingB. haveC. have hadD. had( ) 10. The students see many _____there.A. birdB. duckC. sheepD. rabbit( ) 11. _______ mother is a worker．A. Marry and Mike’sB. Marry’s and Mike’sC. Marry’s and MikeD. Marry and Mike( ) 12. Eating ____food is good for your _____.A. health; healthB. healthy; healthyC. health; healthyD. healthy; health( ) 13. It's cold outside. Please _____ your warm clothes.A. put inB. take offC. put onD. put up ( ) 14. Two months _____ quite long for me . I can't wait.A. isB. areC. wereD. be( ) 15. He _______ worried when he heard this news.A. isB. wasC. doesD. did( ) 16. Wh at’s your friend going ______ next week.A. doingB. doC. doesD. to do( )17. I don’t think that it’s true. He’s always ______ strange stories.A. tellB. tellingC. toldD. tells( ) 18. ——Do you like watching cartoons?——Yes. It makes me ______ relaxed.A. feelB. to feelC. feelingD. to feeling( ) 19. Felicia is ____ honest girl. Everyone in our class likes her.A. aB. anC. theD. /( )20. He _________ to bed at ten every evening.A. is goingB. wentC. goD. goes( ) 21.——______are those flowers？——They are red.A. What colorB. WhatC. WhichD. Who ( ) 22.——_____everyone here today？——Yes，we are all here．A. AreB. IsC. AmD. Be( ) 23.——Thanks a lot．——________．A. That's all rightB. That is allC. That's rightD. No thank ( ) 24. ——Is Alice a doctor？——No，__________．A．he isn’t B．she isn’t C．I am not D．she doesn't ( ) 25. The children _____ a swim this afternoon.A. are going to hasB. is going to haveC. are havingD. are going to have( ) 26. Let‘s _______ a song for you.A. singB. singingC. sangD. sings( ) 27. ——＿＿＿＿？——It is warm and sunny．A. How are youB. How is the weatherC. How old are youD. How much is it( ) 28. The girl's name is Taylor Swift. Taylor is her _______ name.A. lastB. firstC. familyD. full( )29. Mike and Ted are twins. _______are from Australia.A. WeB. YouC. TheyD. Them( ) 30. ——_________my teacher, Miss Li.——Miss Li, _______ my brother.A. This's; HeB. She's; He’sC. This is; this isD. This's; this's ( ) 31．This is my _______ book.A. aB. anC. theD./( ) 32. I have a dog. _____ dog is very clever.A. AnB. AC. /D. The( ) 33. ——You look very beautiful.—— _____.A. OkB. Yes, I amC. Thank youD. No, I’m not ( ) 34. Here_____ two photos of my sister.A. isB. amC. areD. be( ) 35. I'm_______．Let's go to a restaurant to eat dumplings．A. hungryB. tiredC. thirstyD. happy( ) 36. Tony and I are good friends, but we are in different ____.A. classesB. schoolC. gradeD. age( ) 37. There are three _______ in my family.A. peopleB. personC. peoplesD. child ( ) 38.——That’s my bag. Please ____.——OK.A. give it to meB. give me to itC. give it meD. give me it( ) 39. Li Lei often ____ Lin Tao ____ his English.A. help; toB. helps; withC. helps; toD. help; with ( ) 40. He ____ to visit China.A. wantB. to wantC. don’t wantD. wants ( ) 41.He can ____ ping-pong.A. playsB. playC. play aD. plays the( ) 42. There ___ an apple and some pears on the table.A. isB. areC.beD.am( ) 43.——Hello! _____ is Jim speaking. Who _____?——Hello! _______ Jack.A. This; is that; This isB. This; is that; I’mC. That; are you; I’mD. He; are you; I’m( ) 44. Tom with his mother often _____ shopping.A. goB. goesC. goingD. to go( ) 45．How many ______ can you see in the picture?A. tomatosB. tomatoesC. tomatoD. the tomato( ) 46. His telephone number ____ 3364750.A. areB. isC. beD.am( ) 47. ——What are those?——__________ are cakes.A. ThatB. TheseC. ItD. They( ) 48. There _____ some tea in the cup.A. isB. areC. haveD. has( ) 49. ——The box is too heavy.——____ Let me help you.A. You’re right.B. Thank you.C. Don’t worry.D. Not at all.( ) 50. David White is my mum's brother. He's my _______.A. auntB. uncleC. brotherD. cousin( ) 51. ______ name is Felicia. _____ is a girl.A. Her; SheB. Her; She’sC. She’s; HersD. Hers; She ( ) 52.——What color is it?——It’s ____ orange. It’s ____orange pen.A. a; anB. an; anC. an; /D./; an( ) 53. Thank you for ________ me !A. helpingB. helpC. helpsD. to help( ) 54. The dress is very nice and I’ll ____ it.A. thinkB. takeC. wantD. bring( ) 55. Mr. Wang _____two daughters. They ______students.A. have; areB. has; isC. has; areD. is; have ( ) 56. Lin Tao and I ________ in Row Two.A. isB. amC. areD. be( ) 57. I lost some _____ in the classroom.A. pensB. pencilC. bookD. key( ) 58. I can’t find my ticket. I think I have lost ________.A. itB. oneC. thisD. them( )59. Please call Mike ______ 60387358.A. forB. atC. toD. in( ) 60. ——Is this ________ pen?——Yes, it is. It’s ________.A. you; myB. yours; myC. your; mineD. you; mine( ) 61. I have an ______ book. Let’s read it now.A. goodB. funC. boringD. interesting ( ) 62.——Can you _______ this word?——Yes, B-A-L-L.A. spellB. readC. seeD. meet( ) 63.——Let’s play basketball.——_________!A. Thank youB. HelloC. GoodbyeD. Good idea( ) 64.——Are you new students?——No, ______.A. I amB. I’m notC. we areD. we aren’t ( ) 65. Where _____ the lions ______ ?A. does; fromB. do; come fromC. is; fromD. are; come from( ) 66.——Are the erasers on the desk ?——Yes, _____ are .A. theseB. thoseC. itD. they( ) 67.——Is your dictionary on the sofa?——_______.A. Yes, I amB. No, I don’tC. No, it isn’tD. Yes, it isn’t( ) 68.——Where are_______ pens?——Are_______ in the pencil box?A. my; theyB. him; theyC. your; yourD. him; them ( ) 69.——______ is he?——He is my new English teacher.A. WhoB. HowC. How oldD. Where( ) 70.——_____are the twins?——They are _____ the classroom.A. Where; itB. How; inC. Where; inD. Who; in( )71. My dictionary ____ my book are on the desk.A. orB. andC. /D. but( ) 72. ——Where are your parents?——________.A. He is at homeB. He is in his roomC. Yes, they areD. They are in their room ( ) 73. ——What’s that?——It is ____ model plane.A. aB. anC. theD. /( ) 74.——____ is your ring?——It’s on the table.A. HowB. WhatC. WhereD. Where’s ( ) 75.——Is this your dictionary, Tom?——No. It's not_____. I think it’s Sam’s.A. IB.meC. mineD. my( ) 76.—— Mum, ______ is my football?—— It's under your bed.A. whatB. whichC. whenD. where( ) 77.——______ ! I lost my phone.—— What?A. Oh, notB. Oh, noC. Oh, yesD. Oh, I see( ) 78.My______ name is Bob. He’s _____ China now.A. friend, inB. friends’, inC. frie nd’s, inD. friend’s, of ( )79. My father ______ let me play computer games too much.A. isn’tB. don’tC. doesn’tD. haven’t ( ) 80.——The girl _____ red looks very nice.——But the T-shirt doesn‘t look nice ____ her.A. on; inB. in; onC. in; inD. on; on ( ) 81. I’m thirsty. I would like ________.A. two glasses of waterB. two glass of waterC. two glass waterD. two glass of waters( ) 82.——What’s this _____ English?——It’s a ruler.A. inB. atC. onD. of( ) 83.——Who’s _____ lovely girl in red?——She is _____ office worker in that big company.A. a; anB. an; aC. the; aD. the; an( ) 84. Look! This is a picture ______my class. I’m the one in the middle.A. atB. inC. toD. of( ) 85. Bill gets up ___ half past six every morning.A. onB. inC. atD. to( ) 86.——_________?——She is smart but lazy.A. Why do you like herB. What can she doC. What do you think of herD. How old is she( ) 87.——Are there _______plants in your classroom?——Yes, there are _________.A. some; anyB. same; sameC. any; someD. any; any ( ) 88.——Do you have a dictionary?——Yes, I have _____. And _____is on my desk.A. it; oneB. one; oneC. one; itD. it; it( ) 89. He says “ _________ ” to his parents after he gets up. He is a polite boy.A. Good eveningB. GoodbyeC. Good morningD. Good night( ) 90.——Where is the school music room?——____________.A. You’re welcomeB. That’s all rightC. This way, pleaseD. Sure( ) 91. ——What fruit do you want?——Some ______, please.A. eggsB. pearsC. carrotsD. books( ) 92. Let ______ look after grandma at home, please.A. my sister and IB. I and my sisterC. me and my sisterD. my sister and me( ) 93. Where ___ my glasses? I can’t find____.A. is; itB. does; itC. are; themD. do; them ( ) 94. A friend of _____ will come to see _____ tomorrow afternoon. A. her; him B. her; me C. her; I D. hers; me( ) 95. My sister can play _____ violin, but she can’t play _____ socce r.A. the; theB. /; theC. the;/D./ ; /( )96. ______ mothers are both nurses in a hospital.A. Tim’s and Peter’sB. Tim and Peter’sC. Tim’s and PeterD. Tim and Peter( )97.——How many _____ can you see in the picture?——Only one.A. dogB. sheepC. childD. news( )98.——I don’t like the green coat.——____ the red one?A. What’sB. Where’sC. What aboutD. How ( )99. Is your friend a girl ______ a boy?A. butB. orC. andD.so( )100. ——______ do you like math?——Because it's fun.A. WhenB. HowC. WhyD. Where( )101.——I have ________ soccer ball.——Let's play ________ soccer.A. a; aB. a; /C. /; theD. the; a ( )102. Bill ________ a baseball.A. isB. hasC. haveD. are( )103.——My jacket is on the chair.——Let me ________ it for you.A. haveB. hasC. getD. find( )104. My sister has a computer but I _____.A. doB. doesC. don‘tD. doesn't ( )105. Does Helen ________ English books?A. areB. isC. hasD. have( )106. My friend ________ have a TV, but he ________ a computer.A. don't; hasB. doesn't; haveC. doesn't; hasD. don't; have( )107.——Jim, let‘s play outside.——________．A. That sound wellB. That sound goodC. That sounds wellD. That sounds good( )108.——Do you have a basketball?——________．A. Yes, I doB. I doC. Yes, I haveD. Yes, I've ( )109. Let ________ ask our teacher.A. weB. usC. sheD. they( )110. ______ Li Ming _____ a volleyball?A. Does; haveB. Do; haveC. Does; hasD. Do; has( )111. ——Can you s pell “relaxing”?——No, I think it's ________．A. interestingB. funC. boringD. difficult( )112. ——Let's play baseball.——Oh, no, that sounds________．A. boringB. goodC. interestingD. relaxing( )113. Do you ______ TV at home every evening?A. lookB. seeC. watchD. read( )114. ——Paul and I are in the same class.——Oh, you are________.A. brothersB. teachersC. friendsD. classmates( )115. John often plays ________ basketball with his classmates after ________ class.A. the; /B. /; theC. the; theD. /; /( )116. _______ Mary _______ soccer after school?A. Is; playB. Are; playsC. Do; playsD. Does; play ( )117. Sam________ sports every day.A. playB. playingC. playsD. to play( )118.There ______ a clock on the wall. It ______ three hands(指针).A. is; haveB. are; haveC. are; hasD. is; has ( )119.——____ students come to school on foot?——24.A. How muchB. How manyC. HowD. What about ( )120. Let’s ______ the classroom together.A. cleanB. cleaningC. cleanedD. to clean( )121. We'll stay at home ____ it rains tomorrow.A. andB. ifC. butD. so( )122. _____ pencil is this, Tom's or Henry's?A. WhatB. WhenC. WhoD. Whose( )123.——Mum, I'm going to see a film with Lily.——________!A. Good luckB. You are rightC. Have a nice dayD. It's a pity ( )124.——Shall we go for a picnic this weekend?——________．A. Sounds greatB. You're welcomeC. You are rightD. It's a pity ( )125. ——Is the woman a teacher ?——Yes. She teaches _________ English.A. yourB. usC. ourD. yours( )126. ——Where are the twins?——Look! ________.A. Are they thereB. There are theyC. Here are theyD. There they are( )127. This is _____ elephant and that is ____ lion.A. a; aB. a; anC. an; aD. an; an( )128. I as well as Wang Fei ________ in Class 1.A. areB. isC. amD. be( )129. Peter is good at ________．A. swimmingB. swimC. to swimD. swimming( )130. ——Do you know_____ girl ______ green?——Yes. She is our monitor.A. a; inB. an; onC. the; inD. /; in( )131.——How much ________ the shoes?——________ forty dollars.A. is; It'sB. are; They'reC. are; It'sD. is; They're ( )132.Those ______ are our teachers.A. womanB. womansC. womenD. womens ( ) 133.——How much ________ the pair of trousers?——Twenty dollars.A. isB. areC. beD. am( )134. How much ________ do you want?A. tomatoB. strawberriesC. chickenD. pears( )135. These socks looks nice. I'll take________.A. itB. themC. theyD. its( )136. These shoes _____ very nice. How much ____ this pair of black shoes?A. are; areB. are; isC. is; areD. is; is( )137. ——________ milk do you have for breakfast?——Just one glass.A. How muchB. How manyC. How oldD. How about ( )138.——Your shoes look very nice.——________．A. Yes, pleaseB. No, thanksC. Thank youD. No, they aren't ( )139.——Is your sister's name Mary?——Yes, ______ .A. she isB. she isn’tC. it isD.it isn't( )140. ——_______ your brothers?——I think they're in the room.A. Who areB. Where isC. Where areD. Who is ( )141.——________, John?——Oh, I can't find my coat.A. Where are youB. What's wrongC. What color is your coatD. Whose coat is it( )142. There ____ some milk and two apples in the box.A. isB. areC. haveD. has( )143. We are hungry and thirsty because we have no food _______ water.A. andB. orC. butD./( )144. My bag is red, _____ my sister’s _____ red, too.A. and; isB. but; isC. and; isn’tD. but; isn't( )145. There ____ three pens, a ruler and an easer in the pencil box.A. haveB. isC. areD. has( )146. ——______ is your teacher？——He is in the classroom.A. WhereB. WhyC. WhoD. How( )147.——Good morning. I want to buy two ______.——OK. Here you are.A. box of applesB. boxes of appleC. boxs of applesD. boxes of apples( )148. ——Do you have two ______ ?——Yes, I do.A. knifeB. knifesC. knivesD. Knife's( )149. I have ______ eraser and three _____.A. an; pencilB. an; pencilC. a; pencilsD. an; pencils( )150.——How many ______ are there in the fridge?——There is only one.A. appleB. an appleC. little appleD. apples答案：1-5 ABCCC 6-10 BBCAC 11-15 ADCAB 16-20 DBABD 21-25 ABABD 26-30 ABBCC 31-35 DDCCA 36-40 AAABD 41-45 BAABB 46-50 BDACB 51-55 ADABC 56-60 CAABC 61-65 DADDB 66-70 DCAAC 71-75 BDACC 76-80 DBCCB 81-85 AADDC 86-90 CCCCC 91-95 BDCDC 96-100 ABCBC 101-105 BBCCD 106-110 CDABA 111-115 DACDD 116-120 DCDBA 121-125 BDCAB 126-130 DCCAC 131-135 BCACB 136-140 BACCC 141-145 BABAC 146-150 ADCDD。

初一数学冲刺期中每日一练(4)(带答案)

初一冲刺期中数学每日一练1．如图，∠ABD，∠ACD的角平分线交于点P，若∠A＝50°，∠D＝10°，则∠P的度数为（）A．15°B．20°C．25°D．30°2．有下列四个命题：①平行于同一直线的两条直线平行；②在同一平面内，垂直于同一直线的两条直线平行；③两条直线被第三条直线所截，同位角相等；④过一点有且只有一条直线与已知直线平行，其中真命题的个数为（）A．1B．2C．3D．43．如图，是一副形似“秋蝉”的图案，其实线部分是由正方形、正五边形和正六边形叠放在一起形成的，则图中∠MON的度数为．4．如图，将△ABC三个角分别沿DE、HG、EF翻折，三个顶点均落在点O处，则∠1+∠2的度数为°．5．已知△ABC中，∠ABC＝∠ACB，D为线段CB上一点（不与C，B重合），点E为射线CA上一点，∠ADE＝∠AED，设∠BAD＝α，∠CDE＝β．（1）如图（1），①若∠BAC＝42°，∠DAE＝30°，则α＝，β＝．②若∠BAC＝54°，∠DAE＝36°，则α＝，β＝．③写出α与β的数量关系，并说明理由；（2）如图（2），当E点在CA的延长线上时，其它条件不变，请直接写出α与β的数量关系．参考答案与试题解析1．如图，∠ABD，∠ACD的角平分线交于点P，若∠A＝50°，∠D＝10°，则∠P的度数为（）A．15°B．20°C．25°D．30°【分析】利用角平分线的性质计算．【解答】解：延长DC，与AB交于点E．∵∠ACD是△ACE的外角，∠A＝50°，∴∠ACD＝∠A+∠AEC＝50°+∠AEC．∵∠AEC是△BDE的外角，∴∠AEC＝∠ABD+∠D＝∠ABD+10°，∴∠ACD＝50°+∠AEC＝50°+∠ABD+10°，整理得∠ACD﹣∠ABD＝60°．设AC与BP相交于O，则∠AOB＝∠POC，∴∠P+∠ACD＝∠A+∠ABD，即∠P＝50°﹣（∠ACD﹣∠ABD）＝20°．故选：B．【点评】本题综合考查平分线的性质、三角形外角的性质、三角形内角和等知识点．2．有下列四个命题：①平行于同一直线的两条直线平行；②在同一平面内，垂直于同一直线的两条直线平行；③两条直线被第三条直线所截，同位角相等；④过一点有且只有一条直线与已知直线平行，其中真命题的个数为（）A．1B．2C．3D．4【分析】根据平行线的传递性、平行线的性质、平行公理判断即可．【解答】解：平行于同一直线的两条直线平行，①是真命题；在同一平面内，垂直于同一直线的两条直线平行，②是真命题；两条平行线被第三条直线所截，同位角相等，③是假命题；过直线外一点有且只有一条直线与已知直线平行，④是假命题；故选：B．【点评】本题考查的是命题的真假判断，正确的命题叫真命题，错误的命题叫做假命题．判断命题的真假关键是要熟悉课本中的性质定理．3．如图，是一副形似“秋蝉”的图案，其实线部分是由正方形、正五边形和正六边形叠放在一起形成的，则图中∠MON的度数为33°．【分析】由正方形、正五边形和正六边形的性质得到∠AOM＝108°，∠OBC＝120°，∠NBC＝90°，求得∠AOB＝120°＝60°，∠MOB＝108°﹣60°＝48°，得到∠OBN＝360°﹣120°﹣90°＝150°，根据角和差即可得到结论．【解答】解：由正方形、正五边形和正六边形的性质得，∠AOM＝108°，∠OBC＝120°，∠NBC＝90°，∴∠AOB＝120°＝60°，∠MOB＝108°﹣60°＝48°，∴∠OBN＝360°﹣120°﹣90°＝150°，∴∠NOB＝（180°﹣150°）＝15°，∴∠MON＝33°，故答案为：33°．【点评】本题考查了多边形的内角和外角，熟练掌握正方形、正五边形和正六边形的内角的度数是解题的关键．4．如图，将△ABC三个角分别沿DE、HG、EF翻折，三个顶点均落在点O处，则∠1+∠2的度数为180°．【分析】根据翻折变换前后对应角不变，故∠B＝∠HOG，∠A＝∠DOE，∠C＝∠EOF，∠1+∠2+∠HOG+∠EOF+∠DOE＝360°，进而求出∠1+∠2的度数．【解答】解：∵将△ABC三个角分别沿DE、HG、EF翻折，三个顶点均落在点O处，∴∠B＝∠HOG，∠A＝∠DOE，∠C＝∠EOF，∠1+∠2+∠HOG+∠EOF+∠DOE＝360°，∵∠HOG+∠EOF+∠DOE＝∠A+∠B+∠C＝180°，∴∠1+∠2＝360°﹣180°＝180°，故答案为：180．【点评】此题主要考查了翻折变换的性质和三角形的内角和定理，根据已知得出∠HOG+∠EOF+∠DOE＝∠A+∠B+∠C＝180°是解题关键．5．已知△ABC中，∠ABC＝∠ACB，D为线段CB上一点（不与C，B重合），点E为射线CA上一点，∠ADE＝∠AED，设∠BAD＝α，∠CDE＝β．（1）如图（1），①若∠BAC＝42°，∠DAE＝30°，则α＝12°，β＝6°．②若∠BAC＝54°，∠DAE＝36°，则α＝18°，β＝9°．③写出α与β的数量关系，并说明理由；（2）如图（2），当E点在CA的延长线上时，其它条件不变，请直接写出α与β的数量关系．【分析】（1）①先根据角的和与差求α的值，根据等腰三角形的两个底角相等及顶角为30°得：∠ADE＝∠AED＝75°，同理可得：∠ACB＝∠B＝69°，根据外角性质列式：75°+β＝69°+12°，可得β的度数；②同理可求得：α＝54°﹣36°＝18°，β＝9°；③设∠BAC＝x°，∠DAE＝y°，则α＝x°﹣y°，分别求出∠ADE和∠B，根据∠ADC ＝∠B+α列式，可得结论；（2）α＝2β﹣180°，理由是：如图（2），设∠E＝x°，则∠DAC＝2x°，根据∠ADC ＝∠B+∠BAD，列式可得结论．【解答】解：（1）①∵∠DAE＝30°，∴∠ADE+∠AED＝150°，∴∠ADE＝∠AED＝75°，∵∠BAC＝42°，∴α＝42°﹣30°＝12°，∴∠ACB＝∠B＝＝69°，∵∠ADC＝∠B+α，∴75°+β＝69°+12°，β＝6°；故答案为：12°，6°；②∵∠DAE＝36°，∴∠ADE+∠AED＝144°，∴∠ADE＝∠AED＝72°，∵∠BAC＝54°，∴α＝54°﹣36°＝18°，∴∠ACB＝∠B＝＝63°，∵∠ADC＝∠B+α，∴72°+β＝63°+18°，β＝9°；故答案为：18°，9°；③α＝2β，理由是：如图（1），设∠BAC＝x°，∠DAE＝y°，则α＝x°﹣y°，∵∠ACB＝∠ABC，∴∠ACB＝，∵∠ADE＝∠AED，∴∠AED＝，∴β+∠ADE＝α+∠ABC，β+＝α+，∴α＝2β；（2）α＝2β﹣180°，理由是：如图（2），设∠E＝x°，则∠DAC＝2x°，∴∠BAC＝∠BAD+∠DAC＝α+2x°，∴∠B＝∠ACB＝，∵∠ADC＝∠B+∠BAD，∴β﹣x°＝+α，∴α＝2β﹣180°．【点评】本题是三角形的综合题，难度适中，考查了等腰三角形的性质、三角形内角和定理、三角形外角的性质，熟练掌握等腰三角形的性质是关键，知道顶角的度数可以表示两个底角的度数，同时运用了类比的方法解决三个问题．。

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