七年级上错题
七年级上册错题整理
错题整理1.There is an “s”and a “u”in the “study”. 原因:没有弄清那些字母是元音发音。
2.Is there any milk in the fridge? No but we have apple juice. 原因﹕没有注意milk不可数。
3.Yukio is short and fat..这句话在阅读中是对的。
原因:有宽阔的肩膀一般就是指人很胖。
4.Hello, what is your name, please? 原因:我认为what is your name? 不适合加please。
5.Excuse me, is these your pencil box? 原因:认为pencil和box只间要加连字符。
6.易错单词:Cindy Helen I am OK. AD UN well Have a good day I see There are my motherand father Is that your mother’s ring Excuse me I must find it Call me it 1223 E-mail me at 122344@ How about the computer game? Are those your note books? Difficult badminton with that sounds watch TV Let me get it Watching TV is relaxing for me7.She stays at home and ______ an interesting movie.A. watchB. sawC. look atD. seelook, look at, see, watch 都有"看"的意思,但用法不同。
8. is the TV? A. How many B. How much C. How about D. How bigHow many 后+可数名词How much + 不可数名词9. This my uncle. <改为否定句> This my uncle 在be后要加not10. keys in the pencil box. A. a set of;is B a set of ; are C set of; are D mine ; yoursA set of keys 表单数11. 椅子上的两件上衣是绿色的。
七年级上册语文错题及其分析
语文错题及其分析一、读音1. 加点字注音错误的一项是()A惟妙惟肖(xiào)坦荡如砥(dǐ)辗转反侧(zhǎn)称心如意(chèn)B妄自菲薄(bó)潜移默化(qián)辙乱旗靡(mǐ)挑拨离间(jiàn)C装模作样(mó)峰回路转(zhuǎn)沁人心脾(qìn)赫赫有名(hè)D曲径通幽(qū)上窜下跳(cuàn)随声附和(hè)万籁俱寂(lài)错选答案:D错选原因:“装模作样”的“模”的读音是“mú”:“上窜下跳”的“窜”的读音“cuàn”。
正确答案:C2.下列词语中加点字的注音有误的一项是()A差使(chāi)颠簸(bǒ)懦弱(nuò)随声附和(hè)B蹒跚(pán)不屑(xiè)热忱(chén)惟妙惟肖(xiào)C脉络(mài)狭隘(ài)混浊(hún)相形见绌(chù)D粘贴(zhān)执拗(niù)恣肆(zì)锐不可当(dāng)错选答案:A错选原因:“颠簸”的“簸”的读“bǒ”不是“bō”。
“混浊”的“混”字读“hùn”。
正确答案:C小结:容易读错的字音多为(1)多音字:如:“处决、订正、间隙、强迫、中看、潜移默化、字帖、挑拨离间、随声附和”等:(2)易读错的字:如“卑劣、订正、逮捕、一幅、根茎、剔除、弦乐、锐不可当、膝盖、脑髓、喷香、脊梁”等:(3)生僻的字:如“蓦地、永垂不朽、觥筹交错、瓦楞、颠簸”等。
措施:学生对结构复杂字的字音、字型掌握不牢:需多加练习。
二、字形1. 字形有误的一组是()A鄙薄修葺畸形竹篾B阔绰倦怠颧骨游弋C隔阂滑稽琐屑忌讳D害臊沟壑恳荒无赖错选答案:A或C错选原因:主要是没有掌握词的意思:不了解形声字。
七年级上册英语错题大全
以下是七年级上册英语的部分错题及解析:1. _______ (play) in the park?答案:What about playing解析:根据中文提示“在公园里玩”,可知需要填入“在公园里玩怎么样”,而What about后接动词ing形式,表示建议或提议。
2. _______ do you usually go to the movies?With my friend.A. WhenB. WhatC. WhoD. How答案:C解析:根据答语“With my friend”,可知询问的是“和谁”,故选C。
3. _______ do you usually go to the movies?I usually go to the movies at weekends.A. HowB. WhyC. WhenD. Where答案:C解析:根据答语“I usually go to the movies at weekends.”可知,询问的是时间,故选C。
4. _______ do you usually go to the movies?I usually go to the movies on weekends.A. WhenB. WhatC. WhoD. How答案:A解析:根据答语“I usually go to the movies on weekends.”可知,询问的是时间,故选A。
5. _______ do you usually go to the movies?I usually go to the movies with my parents.A. HowB. WhyC. WhoD. When答案:C解析:根据答语“I usually go to the movies with my parents.”可知,询问的是和谁一起,故选C。
七年级数学试卷错题集
一、选择题1. 错题:3 + 2 × 4 = 20正确答案:3 + 2 × 4 = 11错误原因:未正确运用乘法优先级原则。
2. 错题:8 ÷ 2 + 2 = 7正确答案:8 ÷ 2 + 2 = 6错误原因:未正确运用除法和加法的顺序。
3. 错题:5 × (3 + 2) = 25正确答案:5 × (3 + 2) = 25错误原因:题目本身正确,但误以为题目有误。
4. 错题:0.5 × 0.5 = 0.25正确答案:0.5 × 0.5 = 0.25错误原因:题目本身正确,但误以为题目有误。
5. 错题:(-2) × (-3) = 6正确答案:(-2) × (-3) = 6错误原因:题目本身正确,但误以为题目有误。
二、填空题1. 错题:一个数的3倍加上4等于24,这个数是()正确答案:8错误原因:未正确运用代数方法解方程。
2. 错题:如果a = 5,那么a - 2 =()正确答案:3错误原因:未正确进行变量替换。
3. 错题:一个长方形的长是6厘米,宽是3厘米,它的面积是()正确答案:18平方厘米错误原因:未正确运用长方形面积公式。
4. 错题:一个数的平方根是5,那么这个数是()正确答案:±5错误原因:未考虑平方根的正负。
5. 错题:一个数的倒数是2,那么这个数是()正确答案:1/2错误原因:未正确理解倒数的概念。
三、解答题1. 错题:解方程:2x - 5 = 11正确答案:x = 8错误原因:未正确运用等式性质解方程。
2. 错题:计算:(-3) × 4 + 2 × (-5)正确答案:-14错误原因:未正确运用有理数混合运算规则。
3. 错题:求长方体的体积,长是8厘米,宽是4厘米,高是6厘米。
正确答案:192立方厘米错误原因:未正确运用长方体体积公式。
4. 错题:计算三角形面积,底是10厘米,高是6厘米。
七年级上册数学一二单元错题
七年级上册数学一二单元错题一、有理数的概念与分类相关错题。
1. 下列各数:-2,0,(1)/(3),0.020020002·s,π,√(9),其中无理数有()- A. 1个。
- B. 2个。
- C. 3个。
- D. 4个。
- 答案:A。
- 解析:无理数是无限不循环小数。
-2是整数,属于有理数;0是整数,属于有理数;(1)/(3)是分数,属于有理数;0.020020002·s是无限不循环小数,属于无理数;π是无理数;√(9)=3是整数,属于有理数。
所以无理数只有0.020020002·s这1个。
2. 把下列各数填在相应的大括号里:-5,+(1)/(3),0.62,4,0,-1.1,(7)/(6),-6.4,-7,(7)/(3)。
- 正整数集合:{ 4};- 负整数集合:{ -5,-7};- 分数集合:{ +(1)/(3),0.62,(7)/(6), - 1.1,-6.4,(7)/(3)};- 非负有理数集合:{ +(1)/(3),0.62,4,0,(7)/(6),(7)/(3)}。
- 解析:正整数就是大于0的整数;负整数是小于0的整数;分数包括有限小数和无限循环小数;非负有理数是正有理数和0的统称。
- 常见错误是对概念理解不清,比如把0的分类弄错,或者小数与分数的转换不熟练。
3. 下列说法正确的是()- A. 整数就是正整数和负整数。
- B. 分数包括正分数、负分数。
- C. 正有理数和负有理数组成全体有理数。
- D. 一个数不是正数就是负数。
- 答案:B。
- 解析:- A选项,整数包括正整数、0和负整数,所以A错误。
- B选项,分数包括正分数和负分数,B正确。
- C选项,有理数包括正有理数、0和负有理数,C错误。
- D选项,一个数还可能是0,D错误。
二、数轴相关错题。
4. 在数轴上表示-2.5和1.5两点之间的所有整数有()- A. 4个。
- B. 3个。
- C. 2个。
七年级上册英语错题整理
七年级上册英语错题整理
以下是一些七年级上册英语错题整理,以帮助您更好地备考考试。
1. 阅读理解:
题目:The sentence "The book is on the table." means ______.
A. The table is next to the book
B. The book is on top of the table
C. The book is under the table
D. The book is in front of the table
答案:B
解析:在句子"The book is on the table."中,介词"on"表示某物位于另一物的顶部,因此正确答案为B。
2. 词汇:
题目:The word "apple" is a(n) _______ of fruit.
A. example
B. name
C. kind
D. type
答案:B
解析:题目中问的是"apple"是哪个词的例子,根据常识和语境,可以判断出"apple"是水果的名称,因此答案为B。
3. 语法:
题目:The teacher asked us _______ the new words in the textbook.
A. to read
B. read
C. reading
D. reads
答案:A
解析:ask sb to do sth是固定搭配,表示请求某人做某事,因此答案为A。
句意是:老师要求我们读教科书中的新单词。
七年级数学上册错题集及分析
错例举例:1.下列判断错误的是( ) (A )任何数的绝对值一定是正数;(B )一个负数的绝对值一定是正数; (C )一个正数的绝对值一定是正数;(D )任何数的绝对值都不是负数;2.蜗牛在井里距井口1米处;每天白天向上爬行3米;夜晚又下滑2米_________天.3.(7分)出租车司机小李某天下午的营运全是在东西走向的中山路上进行的;如果规定向东行驶为正;他这天下午行车的里程(单位:千米)如下:+8; -6; -5; +10; -5; +3; -2; +6; +2; -5(1) 小李下午出发地记为0;他将最后一名乘客送抵目的地时;小李距下午出发地有多远?(2) 如果汽车耗油量为/千米;那么这天下午汽车共耗油多少升?4、(6分)把下列各数填在相应的表示集合的大括号里:(1)正整数集合{ …… }(2)整数集合{ ……}(3)负分数集合{ …… }5.把下列各数在数轴上表示出来;并用“<”把它们连接起来..........。
-3.5; 0; 4; -1;6.把下列各数在数轴上表示出来;并用“<”把它们连接起来..........。
-3.5; 0; 4; -1;7. 一个点从数轴的原点开始;先向左移动5个单位;再向右移动3个单位;这时该点表示的数是 ( )(A )1 (B )-2 (C )-5 (D )-189.如图;当有20个白色的点时;则黑色的点共有 个。
()31,|5.2|,0,5.4,|3|,96,12,32-------10、绝对值等于7的数是_______。
11、实数-32;18;6--;364中最大的数为____________。
12如图;化简a b a b++-=13()()100101a a-+-=____________________14若x有平方根;且13,x+=则x=____________15下列叙述正确的是()(A)-1是单项式(C)453ab-的常数是-5(B)2231x y xy y-+-是四次四项式(D)3x16下列说法错误的是()(A)多项式是整式;丹整式不一定都是多项式(B)多项式是由几个单项式相加组成的(C)单独的一个字母或数字是单项式(D)多项式的次数是由字母的最高次数决定的17,如果A是六次多项式;B也是六次多项式;则A+B的和一定是()(A)12次多项式(B)6次多项式(C)次数不低于三次的多项式(D)次数不高于六次的多项式18要使多项式22232(52)x x x mx-+-+化简后不含有x的二次项;则m的值为( )(A)0 (B)1 (C)-1 (D)-719若a=-2+2×(-3);23b=-;c=-;则a;b;c的大小关系是()(A) a>b>c (B) b>a>c (C) c>a>b (D) a>c>ba一定是一个()(A)非负实数(B)负实数(C)正有理数(D)非完全平方数21对于有理数1xx的值是()(A)0 (B)2005 (C)-2005 (D)1200522下列各式中;无论x取任何实数都没有意义的是( )(B) (C) (D)23;已知│a-2│+│b+6│=0;则a+b=_______________24;求│21-1│+│31-21│+ … + │991 -981│ +│1001 -991│ 的值。
人教版七年级上精品错题整理
七年级练习册错题集锦一.选择题:1.Look!The fish is in swimming(游)__B__the river.A.atB.inC.ofD.by解析:看,鱼在河里游泳!in the river, 表示在河里2.Are __B__ Mike and Alan ?Yes, And this is ____ friend,Jack.A.they, theyB.they, theirC.their ,theyD.their, their解析:询问他们是Mike和Alan吗?他们用人称代词they,答句说这是他们的朋友Jack,用形容词性物主代词their。
3.Mike's aunt is__B___ English teacher. We all like ____ .A.our;sheB.our;herC.we;sheD.we; her解析:麦克的阿姨是我们的英语老师,我们都喜欢她。
第一空用形容词性物主代词我们的our;第二空,like后用宾格her.4.Cindy! Are Tony __B___ Sally your good friends ?Yes, _____ they are not in my class.A.But ;andB.and;butC.and;andD.but;but解析:Cindy,Tom和Sally是你的好朋友吗?是的,但他们和我不在一个班。
第一空用and,第二空用but。
5.Here is B soccer ball.Do you want to play soccer with me ?Of course. Let’s go.A.a,theB.a ,/C.the, aD.the ,/解析:这是一个足球,一个足球:a soccer ball;踢足球play soccer,play直接+球类运动。
6.Who is your English teacher ?Miss Gao, She teaches B English very well.A.ourC.oursD.we解析:她教我们英语教得好,teach 后用宾格us。
七年级上册数学错题整理
七年级上册数学错题整理一、有理数1. 等式$-x-13=-5$的解为多少?2. 若$x+5=0$,求$x-2$的值。
3. 在有理数集中,以下式子中正确的是:$(-2)^2=2^2$。
4. 取反数的概念掌握不够熟练,解决方法是像$-\dfrac{3}{5}$的相反数是$\dfrac{3}{5}$,$-(-\dfrac{3}{5})=\dfrac{3}{5}$,还可以做$\dfrac{-3}{5}=\dfrac{3}{5}\cdot (-1) $推广到一般情况,即$-\dfrac{a}{b}=\dfrac{a}{b}\cdot(-1)$。
二、代数式与方程1. 若$2x-3=7x-2$,求$x$。
2. 若$\dfrac{3}{x}=\dfrac{5}{8}$,求$x$。
3. 如果$x=2$时,$2x+1=a$,求$a$。
4. 此章涉及到求解方程和代数式化简,需要掌握一些基本的方法和公式。
比如移项法,合并同类项,分配律,平方差公式等。
三、图形的初步认识1. 若正方形的一条边的长度为$x$,那么正方形周长的长度为多少?2. 如果一条边长为$x$的正方形的面积是$25$,求$x$的解。
3. 关于平行线和平面内的角的知识点没有掌握好,如何定义平行线,平面内的角的定义和性质,需要及时补充。
4. 直角三角形中,直角所对的边叫做斜边,需要注意该术语的含义。
四、分数的初步认识1. 计算$\dfrac{2}{3}+\dfrac{3}{4}$。
2. 计算$\dfrac{3}{4}-\dfrac{1}{3}$。
3. 无论是加减乘除,涉及到分数的化简操作时,需要将分数化为通分分数或化为约分后更简便的形式。
4. 考虑到分数的本质即为除法,可以通过将除数与被除数颠倒后,乘以倒数的形式来进行计算。
五、一次函数初步1. 已知函数$f(x)=2x+3$,求$f(-2)$的值。
2. 已知函数$f(x)=\dfrac{1}{2}x-1$,求当$x=6$时,$f(x)$的值。
七年级上册数学错题集
七年级上册数学错题集1、若干学生住若干间房间,如果每间住4人,则有20人没有地方住,如果每间房住8人,则有一间只有4人住,问共有多少个学生?设有x间宿舍每间住4人,则有20人无法安排所以有4x+20人每间住8人,则最后一间不空也不满所以x-1间住8人,最后一间大于小于8所以0<(4x+20)-8(x-1)<80<-4x+28<8 乘以-1,不等号改向 -8<4x-28<0加上28 20<4x<28 除以4 5<x<7x是整数所以x=6 4x+20=44所以有6间宿舍,44人2、甲对乙说:“你给我100元,我的钱将比你多1倍。
”乙对甲说:“你只要给我10元,我的钱将比你多5倍。
”问甲乙两人各有多少元钱?设甲原有x元,乙原有y元. x+100=2*(y-100) 6*(x-10)=y+10 x=40 y=1703、小王和小李从AB两地,相向而行,80分钟后相遇,小王先出发60分钟后小李在出发,40分钟后相遇,问小李和小王单独走完这段距离需要多长时间?解:设小王的速度为x,小李的速度为y根据:路程=路程,可列出方程:80(x+y)=60x+40(x+y)解得y=1\2x 设路程为单位1,则:80(1\2x+x)=1 解得x=1\120 所以y=1\240所以小王单独用的时间:1*1\120=120(分)小李单独用的时间:1*1\240=240(分)4、一天,猫发现前面20米的地方有只老鼠,立即去追,同时,老鼠也发现了猫,马上就跑。
猫每秒跑7米,用了10秒追上老鼠。
老鼠每秒跑多少米?解:设老鼠每秒跑X米7*10=10X+20 10X=70-20 X=5 答:老鼠每秒跑5米。
5、一项工程,甲单独做10天完成,乙单独做6天完成。
先由甲先做2天,然后甲乙合作,问:甲乙合作还需要多少天完成工作?设甲乙合作一起还需要x天完成,总工程为1,甲先做了2天,他完成了总工程的2*1/10=1/5 那么此时还剩下为1-1/5=4/5 ,那么就有了(1/10+1/6)*x=4/5 解得x=3 ,即一起工作3天完成整个工作。
初中七年级英语上册U1-U8错题整理
班级__________ 姓名__________U1错题整理一、用正确的形式填空1.Write Julia, Simon and other (name) on the blackboard.2. Eddie buys (a/an)e-dog.3.Sandy’s father and mother(be)from Nanjing.4.Andy, do you know she (come) from Suzhou?5.This pair of shoes for Nick. The shoes white.(be)6.He (want) to go to the park with me next week.7.Everyone in our class (be) running in the playground.8.My uncle, Jim is good at (play) the guitar.9. My brother often (fly) a kite in the park.10.Andy is good at (swim). He after school every day.一、根据句意和汉语释义写出单词。
1. I think the story is_______(真实的),but my parents don’t think so.2. Hold on to your ________ (梦想). One day they may come true.3. The child_______(希望) that he can go to school soon.4. We usually have much homework, so we _________ (not watch)TV on weekdays.5. Kitty, with her parents, ________(walk )the dog every morning.6. There area lot of __________ (有趣的)things in today’s newspaper.7. Drinking water every day can make________ (we) feel great.8. The little girl ________(享受…乐趣) playing with her doll at home,He even plays it on rainy days.9. We must remember all the ________ (英雄的)names.10. We all know ________ (步行)every day is good for our health.二、选择题1. ---____________ ---He looks tall and strong.A. How is he?B. How does he look?C. What does he like?D. How is he like?2. Who ______ go _________ with your PE teacher?A. want to; swimB. would like to: swimmingC.wants; swimmingD. would like; swimmimg3. Amy usually_______ from school, but today she goes home by bike.A. walk homeB. walk to homeC. walks homeD. walks to home4. She wants ________ the room. Would you like ________ her?A. clean; helpB. to clean; helpC. clean; to helpD. to clean; to help5. Amy’s mother always makes her ______ English every morning.A. readB. readsC. readingD. to read6. Simon knows ________ about English. What about you?A. a lot ofB. lots ofC. a lotD. many三、句型转换1. He enjoys listening to music.(对画线部分提问)_______ _______ he _______ _________?2. Daniel does his homework every evening. (改为否定句)Daniel_________ ________ his homework every evening.3. I do my homework every evening.(改为一般疑问句)_______ you_______your homework every evening?4.Her English teacher lives in Spring Street. (对划线部分提问)_______ _______ her English teacher _______?5.She plays games at 4;30p.m. (对划线部分提问)________ _________ she play games?6.He does his homework from 7 to 8 every evening. (对划线部分提问)______ _______ he _______ from 7 to 8 every evening?四、根据汉语意思完成句子:1. 踢足球让我们感觉很棒。
牛津译林版七年级英语上册 Unit1 错题练习(含答案)
牛津译林版七年级上册Unit1 错题练习1、单词辨音()1.A. bedroom B.look C.goodbye D.food()2.A. thank B.uncle C.English D.orange()3.A. water B.want C.wash D.watch()4.A. blouses B.horses C.buses D.classes()5.A. over B.only C.old D.off()6.A. music B.June ually D.excuse()7.A. short B.for C.story D.sport2、词汇1. Who are the dog’s ____________ (主人)? They should learn how to look after them first.2. Look at the ____________ (电子狗). They are smart! They can speak.3. --- Whose bag is bigger, yours or ____________ (he)? --- Of course mine is! It’s also heavier.4. These bikes are my ____________ and those are theirs.(同班同学)5. There are only twenty ____________ (man) teachers in our school.6. Mary likes m____________ very much. She practises singing every morning.7. Both Wendy’s and Bob’s ____________ (表妹) enjoy reading in their free time.8. The new ____________ (学生) in my class are all from the USA.9. The film is ____________ (结束) and we work back to our home.10. These sports clothes are my ___________ (classmate). I want to have such sports clothes, too.11. There are two books on ____________ (we) desk., but they are not ____________ (we).12. I want to be in the ____________ (swim) Club this term. It’s good to swim after school.13. These keys are my ____________ (classmate). They are the keys to their lockers.14. Peter sits between David and ____________ (I) in the class.15. Jack, do you know ____________ (每人) name in your class now?16. They have books for children of different ____________ (年龄) in the bookshop.17. Millie is ____________ (good) at singing than Amy.18. Sally goes to ____________ (draw) lesson every Saturday afternoon.3、单项选择1. --- I’m twelve years old. _____ are you, Ted? --- I’m thirteen. I’m one year older than you.A.HowB.How oldC.WhatD.What about2. --- Can you _____ French? --- Yes, I can _____ the word in French.3.I _____ walk _____ after school. I ride the bike every day.A./; homeB./; to homeC.don’t; homeD.don’t; to home4.--- _____? --- He is tall and strong.A.What does Daniel likeB.How does Daniel look likeC.What does Daniel look likeD.How is Daniel5.Sandy has big _____ and _____.A.eyes; a long hairB.eyes; long hairC.eyes; long hairD.eye; long hair6.My father with my mother _____ to news on the radio every morning.A.listenB.listensC.is listeningD.to listen7.The twins _____ work hard at lessons. We must help them.A./B.don’tC.aren’tD.doesn’t8.--- Shall we go shopping this Saturday afternoon? --- _____.A.Good ideaB.Sorry, I don’t like itC.Yes, pleaseD.No, Thanks9.The girl _____ glasses is our new classmate _____ from Shanghai.A.wears; comesB.with; comesC.wears; /D.with; /10.Let’s _____ home and _____ TV this evening.A.stay at; to watchB.to stay; to watchC.stay; watchingD.stay at; watch11.That _____ good news. Do you think so?A.isB.is aC.areD.are a12.--- Oh, it’s too late. I must go to bed. --- _____.A.Good morningB.Good eveningC.Good afternoonD.Good night13.--- Would you like something to drink, Sandy? --- _____. I am a little thirsty.A.Yes, pleaseB.No, thanksC.Yes, I wouldD.No. I wouldn’t14.--- Is your name Allen? --- Yes, _____.A.you areB.I amC.he isD.it is15.--- Who _____ the old man _____? --- Nobody. He lives alone.A.is; livingB.does; liveC.is; living withD.does; live with16.His birthday is _____ June 12th and he _____ born in Suzhou.A.in; isB.on; isC.in; wasD.on; was17.Look! There’s _____ orange in the bottle. Would you like to have some?A.muchB.manyC.anyD.an18.--- What’s that in the box? --- _____ a book.A.It’sB.There’sC.That’sD.This is19.Do you know how _____ it in English?A.to speakB.to sayC.speakD.say20.--- Where _____ Simon and Daniel from? ---They come from the USA.A.doesB.isC.areD.do21.--- What shall we do on Sunday? ---What about _____ with Tom?A.go swimmingB.going swimmingC.go to swimmingD.go to swim22.Kitty is _____ the UK. She lives _____ her family _____ Shanghai.A.in; with; inB.from; in; atC.in; from; atD.from; with; in23.--- _____ boy is you cousin? --- The one _____ short dark hair.A.Whose; withB.Which; withC.Whose; hasD.Which; has24.--- Isn’t Mr. Brown your English teacher? --- _____. He teaches us very well.A.Yes, he isn’tB.No, he isC.Yes, he isD.No, he isn’t25.--- _____ your cousin _____? --- He is tall and strong. He is a football player.A.What does; likeB.How does; likeC.What does; lookD.How does; look26._____ are good friends. We always help each other, right?A.I, you and JimmyB.You, I and JimmyC.You, Jimmy and ID.Jimmy, you and I4、动词填空1. Sandy, together with her parents, often ___________ (come) to China for holiday.2. Look! The boy in the car ___________ (have) a pet dog with him.3. Look, the students in the team each ___________ (have) a new bag on their bag.4. Girls, listen to the music, and ___________ (tell) me the name of the music.5. This pair of shoes ___________ white, my favourite colour.6. Toby, you ___________(not be) very tall, but you can still play basketball very well.7. Some girls ___________ (sing) English songs in the music classroom on Wednesdayafternoon.8. Sam, ___________(not be) afraid of anything.9. My cousin, Sam, ___________ (not be) afraid of anything.10. --- who ___________ (fly) kites here? --- Sandy is.11. Kitty ___________ (not do) well in Maths, but she speaks English well.12. Here ___________ (be) some good sports news for you, boys and girls.13. Sandy with her friends often ___________ (study) in the next room.5、句型转换1. The twins like listening to the music very much. (对划线部分提问)___________ ___________ listening to the music very much?2. I’m in Class 3, Grade 7 at my new school. (对划线部分提问)___________ ___________ ___________ you ___________ at your new classmate.3. Li Lei and his family live in Wuxi now. (同义句转换)Li Lei ___________ ___________ his family in Wuxi now.4. The boy has a book in his hand. He is my new classmate. (合并为一句)The boy ___________ a book in his hand ___________my new classmate.5. Girls’ hair is usually longer than boy’s.Girls usually ___________ ___________ ___________ than boys.6、完成句子1. --- 彼得擅长什么运动?--- 他游泳游得很好。
七年级数学(上)典型错误大全,纠错练习
1.1 从自然数到分数1.下面关于万里长城的描述中用了很多自然数,请找出这些数,并说说它们哪些表示计数和测量,哪些表示标号或排序.我国的长城始建于公元前7世纪,前后修造了2000余年。
明长城从山海关到嘉峪关,实际长度为5130千米(和一万零二百六十里),故被称为万里长城.以明代修建长城作估算,需要砖石5000万立方米,土1.5亿立方米.若用这些砖石和土方筑成一道宽1米,高5米的长墙,能绕地球赤道约一周;如用来铺筑宽5米,厚50厘米的公路,能绕地球赤道约两周.解:75130、1、5、5、50表示测量。
错误原因:混淆了排序和计数,计数与测量的概念。
它们的区别是:标号和排序有一定顺序,由小到大排列的数,像学号、名次、年代等;而计数,是记录累计的数字,像2008所学校,100本数等;测量则是借用工具测出或估算的数量,如长度、高度、面积等.正确答案:7表示排序;2000表示计数;5130、5000、1、5、5、50表示测量。
模拟训练:(1)下面关于金字塔的描述中用了很多自然数,请找出这些数,并说说它们哪些表示计数和测量,哪些表示标号或排序.埃及的金字塔始建于公元前2700年~2500年,建造地点位于埃及开罗附近的吉萨高原是7大奇迹之一.古埃及所有金字塔中最大的一座,是第四王朝法老胡夫的金字塔,这座大金字塔原高146.59米,经过几千年的风吹雨打,顶端已经被剥蚀了将近10米.但在1888年巴黎建起埃菲尔铁塔之前,它一直是世界上最高的建筑物.这座金字塔底面呈正方形,每边长230多米,绕金字塔一周,差不多要走1公里的路程.(2)下列语句中用到的数,哪些属于计数?哪些表示测量结果?哪些属于标号或排序?a.标准运动场跑道全长400米;b.刘翔在雅典奥运会的号码1363;c.学校预计今年七年级招生500人;d.数学练习共85页;e.2008年奥运会在北京举行。
属于计数的有,属于测量的有,属于标号的有,属于排序的有.2.如图,设大的等边三角形的面积为2,每个小三角形的面积相等,则阴影部分的面积用分数表示为.解:2 5错误原因:审题不清,把大的等边三角形的面积当作“1”来做;这是同学们惯性思维的错误(常常把“总量”“总面积”等当作“单位1”来做的原因)。
七年级上5,6单元错题(实意动词练习)
七年级上5,6单元错题〔实意动词练习〕一,单项选择()1.________ she have a pencil box?A.Do B.Is C.Does D.Are()2.Does Helen________ English books?A.are B.is C.has D.Have()3.My friend ________ have a TV, but he________ a computer.A.don't; has B.doesn't; have C.doesn't; has D.don't; have()4.________ his sister have a friend?A.Is B.Am C.Does D.Do()5.________ wants to play baseball with us.A.She B.Her C.Hers D.They()4.________ Li Ming________ a volleyball?A.Does; have B.Do; have C.Does; has D.Do; has()6.My sister________ a nice room.A.have B.has C.there is D.there are()7.Do you ________ TV at home every evening?A.look B.see C.watch D.read()8.I have an________ book.A.good B.fun C.boring D.interesting()9.Here is________ basketball. Do you play________ basketball?A.a; the B.a; a C.a; / D.the; the()10.________Mary________soccer ofter school?A.Is; play B.Are; plays C.Do; plays D.Does; play()11.He watches them ________ TV.A.for B.under C.in D.on()12.Sam________ sports every day.A.play B.playing C.plays D.to play1页()13.Jim and Mary ________ a basketball.A.has B.have C.are D.not have()14.________ he ________ tennis balls?A.Does; has B.Does; have C.Do; have D.Do; has()15.2021·凉山—Look at those teachers over there. Which is your new art teacher?—The man________ curly hair. He is very funny.A.with B.in C.on D.for()16.—Let's play ________ soccer.—I don't have ________ soccer ball.A./; a B.the; a C.a; the D./; the()17.________ Jim________ a baseball?A.Do; have B.Does; has C.Does; have D.Do; has()18.John usually ________ at 5:30 in the afternoon.A.go home B.goes home C.go to home D.goes to home()19.My grandparents love me very much, and I love________,too.A.they B.them C.their D.theirs()20.We________ have a volleyball.A.aren't B.don't C.doesn't D.isn't()21.—Shall we go for a walk?—________ great.A.Feels B.Sounds C.Turns D.Looks()22.I don't like tennis. It's difficult ________ me to play it.A.of B.for C.in D.to()23.Their jackets have ________ color.A.same B.same's C.the same D.a same()24.—________ Alice and Helen play sports after school?—Yes, they ________.A.Do; do B.Does; does C.Do; does D.Does; do2页二,按要求写句子1.Jim has a soccer ball.(改为一般疑问句)________ Jim ________ a soccer ball?2.Do they have watches?(改为单数句)________ he ________ a ________?3.Do Jim and Bill have TVs?(作否认答复)No, ________ ________.4.你姐姐有电脑吗?________ your sister ________ a ________?5.We have a computer room.(改为一般疑问句)________ you ________ a computer room?6.Tom has a tennis racket.(改为否认句)Tom ________ ________ a tennis racket.7.She has a basketball.(改为一般疑问句)________ she ________ a basketball?8.I have a pingpong ball.(用Tom代替I改写句子)________ ________ a ping-pong ball.9.Jack plays basketball after school.(改为一般疑问句)________ Jack ________ basketball after school?10.I watch TV in the evening.(用she作主语改写句子)________ ________ TV in the evening.11.Kate watches TV in the evening. (改为否认句)Kate ________ ________ TV in the evening.12.我们没有网球拍。
七年级上册语文卷错题为什么错的原因文言文
七年级上册语文卷错题为什么错的原因文言文1、下列选项中加着重号字注音正确的一项是()[单选题] *A、撑着zhǎng 彷徨páng 凄清qī雨巷xiàngB、彳亍chù凄婉wǎn 颓圮pǐ迷茫méngC、河畔pàn 荡漾yàng 青荇xìng 长篙gāo(正确答案)D、斑斓lán 沉淀dìng 似的sì泥古nì2、“盛筵必散”一语出于《红楼梦》中何人之口?( ) [单选题] *A.探春B.秦可卿(正确答案)C.小红D.妙玉3、25.下列词语中加点字的读音,全都正确的一组是()[单选题] *A.妯娌(zhóu)酒肆(sì)镌刻(juān)暴风骤雨(zhòu)(正确答案)B.狡黠(xié)挟持(xié)胡髭(zī)惨绝人寰(yuán)C.燥热(cào)翘首(qiào)嶙峋(xún)言不由衷(zhōng)D.私塾(shú)遁形(dùn)糜子(mí)日夜不辍(zhuì)4、47. 下面是对《钢铁是怎样炼成的》相关内容的叙述,不正确的一项是()[单选题] *A.保尔十二岁时因成绩不好,又把烟灰放在了瓦西里教父的复活节面包里,不得已退学。
后来到了一家旅店打杂,因为强迫加班导致误工而被赶出了旅店。
B.沙皇被推翻的消息轰动了俄罗斯。
保尔所在的小镇上,出现了一些“布尔什维克”。
富人都逃跑了,红军来了,市民得到了红军发配的枪支。
C.不好的消息“烧杀掳掠犹太人”在镇上传得沸沸扬扬,引起很多人的惊恐,保尔的好友谢廖沙等人商量着如何躲避。
屠杀进行了三天两夜,有很多人因此丧命,但只有几个人敢于抵抗。
D.苏维埃政权建立了,乌克兰共青团地方委员会建立起来了,红军攻占了谢别托夫卡小镇。
丽达不顾母亲阻拦,加入红军,成为了一个布尔什维克。
七上数学错题
七上数学错题标题:七年级上册数学常见错题及解析引言:数学是一门需要理解和运用的学科,而在学习过程中,学生常常会遇到一些容易出错的题目。
本文将详细介绍七年级上册数学中常见的错题,并给出解析,希望能帮助同学们更好地理解和掌握数学知识。
一、整数运算错误:1. 错题:计算 6 - 9 = ?解析:在整数运算中,减法可以转化为加法,即 6 - 9 可以转化为6 + (-9)。
因此,答案为 -3。
2. 错题:计算 -2 × 3 = ?解析:在整数乘法中,两个负数相乘的结果是正数。
因此,-2 × 3 = -6。
二、分数运算错误:1. 错题:计算 1/3 + 1/4 = ?解析:在分数相加时,需要找到两个分数的公共分母。
对于1/3和1/4,最小公倍数是12。
因此,1/3 + 1/4 = 4/12 + 3/12 = 7/12。
2. 错题:计算2/5 × 3/4 = ?解析:在分数相乘时,直接将两个分数的分子相乘,分母相乘。
因此,2/5 × 3/4 = 6/20 = 3/10。
三、代数式化简错误:1. 错题:化简表达式 2x + 3x + 4x = ?解析:在代数式化简中,相同字母的系数相加即可。
因此,2x + 3x + 4x = (2+3+4)x = 9x。
2. 错题:化简表达式 5a - 2b + 3a + b = ?解析:在代数式化简中,相同字母的系数相加,不同字母的项保持不变。
因此,5a - 2b + 3a + b = (5+3)a + (-2+1)b = 8a - b。
四、几何图形计算错误:1. 错题:计算矩形的面积,长为4cm,宽为3cm,求面积。
解析:矩形的面积可以通过长乘以宽得到。
因此,面积为4cm × 3cm = 12cm²。
2. 错题:计算圆的周长,半径为6cm,求周长。
解析:圆的周长可以通过直径乘以π得到。
因此,周长为2 × 6cm × π ≈ 37.68cm。
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七年级上错题
如图,E、F两点把线段AB分成AE: EF: FB =2: 3:4的三部分,D是线段AB的中点,
(1)若FB =12,求DF的长;
(2)求AE: ED的值.
设AE=2X
∵AE:EF:FB=2:3:4,AE=2X
∴EF=3X,EB=4X
∵FB=12
∴4X=12
∴X=3
∴AB=2X=6,EF=3X=9
∴AB=AE+EF+FB=6+9+12=27
∵D是AB的中点
∴BD=AB/2=27/2
∴DF=BD-FB=27/2-12=3/2
2、
设AE=2X
∵AE:EF:FB=2:3:4,AE=2X
∴EF=3X,EB=4X
∴AB=AE+EF+FB=2X+3X+4X=9X
∵D是AB的中点
∴AD=AB/2=9X/2
∴ED=AD-AE=9X/2-2X=5X/2
∴AE/ED=2X/(5X/2)=4/5
∴AE:AD=4:5=0.8
已知线段AB=14,在AB上有C.D.M.N四点,且满足AC:CD:DB=1:2:4,AC=2AM,DB=4DN,求MN的长度。
由AB=14,AC:CD:DB=1:2:4,AC+CD+DB=AB得:AC=2,CD=4,DB=8。
再由AC=2AM得,AM=CM=1/2AC=1。
由DB=4DN得,DN=1/4DB=2。
(1)如果N在D的左侧,那么,MN=CM+CD-DN=1+4-2=3;
(2)如果N在D的右侧,那么,MN=CM+CD+DN=1+4+2=7。
某厂加工一种农副产品,每千克成本为20元,销售单价为30元。
该厂为鼓励客户购买这种农副产品,决定当一次购买千克数超过50千克时,没多购买一千克,全部农副产品的销售单价均降低0.02元,但不能低于25元。
1.当一次购买多少千克时,销售单价恰恰为25元?
2.当客户一次购买400千克时,该厂获得的利.
3.当客户一次购买200千克时,该厂获得的利润是多少?
解:(1)设当购买x千克时,销售单价恰为25元,则
30-(x-50)×0.02=25,
解得x=300.
所以当一次购买300千克时,销售单价恰为25元
(2)∵400>300,所以此时价格为25,
所以利润为:(25-20)×400=2000.
(3)当购买200千克时价格为30-(200-50)×0.02=27,
利润为:(27-20)×200=1400.
分析:(1)可以设当购买x千克时,销售单价恰为25元,从而列出方程式30-(x-50)×0.02=25,可以求得x的值;
(2)(3)中400和200分别与x比较,如果大于x则价格为25元,当小于x时价格为30-(n-50)×0.02.从而求得利润
邻居张叔叔星期天准备做两件事:一是到邮局拿某杂志社寄给自己的论文稿费,二是买礼物送爸妈和女友.
(1)邻居张叔叔先到邮局拿论文稿费.国家规定稿费超过一定数额需缴纳所得税,有关规定如下表:
稿费数额纳税方法
稿费不高于800元不纳税
稿费高于800元但不高于4000元应缴纳超过800元的那一部分的14%
稿费高于4000元应缴纳全部稿费的11%
张叔叔从邮局拿到税后稿费为3380元,问该杂志社给张叔叔的税前论文稿费为多少元?(2)邻居张叔叔拿到稿费后到商店准备为爸妈买四盒“补雪”牌补品,同时为女友买三瓶相同的“露”牌化妆品.张叔叔对比了甲、乙两家商店这两种商品的标价,发现“补雪”牌补品都是每盒300元,“露”牌化妆品都是每瓶200元.现在两家商店正在搞促销活动,促销办法如下表:
商店促销办法
甲全部按标价的九折出售
乙不打折,但买四盒“补雪”牌补品可以送一瓶“露”牌化妆品
请你帮助邻居张叔叔出个主意,要在这两个店买,应怎样买最省钱?共需多少钱?并写出购买方案.
某商场计划拨款9 万元从厂家购进50 台电视机.已知厂家生产三种不同型号的电视机,出厂价分别为:甲种每台1500 元,乙种每台2100 元,丙种每台2500 元.
(1) 若商场同时购进其中两种不同型号的电视机50 台,用去9 万元,请你研究一下商场的
进货方案.
(2) 若商场每销售一台甲、乙、丙电视机可分别获利150 元、200 元、250 元,在以上的方案中,为使获利最多,你选择哪种进货方案?
已知x=-3是关于x的方程2k-x-k(x+4)=5的解,求k的值;
(2)在(1)的条件下,已知线段AB=12cm,点C是直线AB上一点,且AC:BC=1:k,若点D是AC 的中点,求线段CD的长。
解:(1)k=2;
(2)①当点C在线段AB上CD=2cm
②当点C在线段BA延长线上CD=6 cm
所以CD=2cm或6cm。