重难点突破练习(1)

合集下载

北师大版小学数学四年级上册重难点突破试题全套

北师大版小学数学四年级上册重难点突破试题全套

北师大版小学数学四年级上册重难点突破卷1动手操作能力一、我会画。

(每题6分,共36分)1.过点A分别画出下面直线的垂线。

2.过直线外一点O,分别画出直线AB的平行线。

3.在方格中分别画一组平行线和一组互相垂直的直线。

4.从下面射线的一端A点开始,截取一条3厘米长的线段AB。

再以点A为顶点画一个65°的角。

5.用量角器分别画出60°和125°的角。

6.找规律,画一画。

二、我会连。

(每题6分,共12分)1.观察算式的特点,连一连。

2.每个盒子里可能摸出什么球?(连一连)三、我会按要求解决。

(每题6分,共24分)1.用三角尺比一比,下面图形中哪两条边是互相垂直的?请画上直角符号。

2.先估一估下面各角的度数,再量一量。

3.从下图中各找出两组互相平行的线段,并用不同的颜色描出来。

4.涂色表示出气温。

四、走进生活,解决问题。

(第1题8分,第2、3题每题10分,共28分)1.按要求作图。

(1)画一条从小木屋到蘑菇房的最近的路。

(2)画一条从蘑菇房到小河的最近的路。

2.四个小朋友做“抢椅子”的游戏,他们的位置如下。

谁最有可能先坐在椅子上?你能说出理由吗?3.按要求完成各题。

(1)公园的西面600米的地方有一个邮局,请你用△标出它的位置。

(2)邮局的北面400米的地方有一所学校,请你用☆标出学校的位置。

答案一、1.2.3.略4.5.6.二、1.2.三、1.2.12045603.略4.四、1.2.小龙,因为小龙离椅子最近。

3.重难点突破卷2数对、可能性的判断与分析一、我会填。

(第2题2分,第4题4分,其余每空2分,共16分)1.数对(3,7)表示这个物体在第3列,第7行,那么数对(5,6)表示这个物体在第()行,第()列。

2.刘强坐在教室的第5列第2行,用数对(5,2)表示;李方坐在刘强的正前面,李方的位置用数对(,)表示。

3.鲤鱼()在天上飞;人类的生存()离不开水;买彩票()中大奖。

2021年河南中考英语总复习重难点突破练习:阅读理解(有答案) (1)

2021年河南中考英语总复习重难点突破练习:阅读理解(有答案) (1)

2021河南中考英语总复习重难点突破练习:阅读理解1.Once there was a club that only smart people could join. Many people wanted to join it so that they would be able to spend more time with other smart people.One night, the club's members were having a dinner party in a restaurant. They talked and enjoyed their food. One of them thought that his salad tasted a little boring, so he asked for a salt shaker(调料瓶)and added some salt. However, it turned out to be sugar. The group found that the salt on the table was in the sugar shaker while the sugar was in the salt shaker.The club members told the waiter about the problem. But there were no other bottles. How could the waiter solve this problem? After a long discussion, the group suggested some ways to make it right.But the waiter simply looked at the shakers and said, "It's easy." He took the labels(标签)off both shakers and exchanged(互换)them. The room quickly became silent.Sometimes we make problems more difficult to solve than they should be.It's good to take a step back and see if there is a simpler way first.(1)Many people hoped to join the club because ________.A.they thought they were not smart enoughB.they could get free mealsC.they would be around smart peopleD.they could spend more time eating(2)What problem did the group run into?A.Their salad tasted a little boring.B.They had nothing to eat but the salad.C.There was no salt or sugar shaker on the table.D.Sugar and salt were put in the wrong shakers.(3)How might the group describe the waiter at last?A.He was lazy.B.He was clever.C.He was shy.D.He was friendly.(4)What does the story teach us about the problems we face?A.Ask others for advice.B.Think out of the box.C.Leave them for the smart.D.Solve them on our own.2.Airports(机场)can be interesting places to work. There are many different kinds of jobs. But do you know how to get such a job?Find a Job You Would EnjoyIn the beginning, you need to search for necessary information like available jobs in the air travel industry(行业). Then you can look through the job that interests you most. Next you have to find out what training, qualifications(证书), education, or skills it needs.Make Your Resume(简历)A good resume should include your full personal information such as name, address, phone number, e-mail and work experience. It can help others know you clearly and quickly. They will use your resume to see if you are able to do the job well.Prepare for Your Interview(面试)Once you get a call for the interview, you have to prepare for it. On the one hand, you must make sure not to be late for it. You can set an alarm to remind yourself. On the other hand, you should try to give a good performance. You can practice yourself by thinking about what questions will be asked and how you will answer them.(1)What should you do first if you want to find a job in airports?A.Look through the interesting. jobs.B.Search for the information about available jobs.C.Find out what the job needs.D.Ask people in the air travel industry for help.(2)What does a good resume NOT need according to the material? and address.B.Phone number.C.Work experience.D.Personal hobbies.(3)What do we know from the material?A.The airport only offers a few jobs.B.People should find relaxing jobs.C.A good resume can help others know your ability(能力).D.It's natural for people to be nervous before an interview.(4)What will the writer most probably talk about next?A.Other ways of self-practice.B.An example of a good resume.C.People's ideal(理想的)jobs.munication skills on the phone.3.A man owed(欠)a large amount of money to a loan shark(放高利贷者). The loan shark happened to love the man's daughter very much.He told the man that there was a chance to clear the debt(债务).He told the man and his daughter that he would place two pebbles(鹅卵石)into a bag—one was white and one was black. The daughter would then reach into the bag and pick out a pebble. If it was black, he would clear the debt, but the man would let him marry the girl. If it was white, he would also clear the debt, but the daughter wouldn't have to marry him.He then bent over and picked up two small stones from a path full of pebbles. The daughter happened to see that the two pebbles he picked up were both black!He then asked the daughter to pick a pebble from the bag. She did so, but before looking at it, she dropped it among the other pebbles on the path.She said to the loan shark, "Oh, how stupid of me. Never mind, if you look into the bag for the one that is left, you will be able to tell which pebble I picked."The pebble left in the bag, of course was black. The loan shark had to recognize the pebble the daughter dropped was white and clear her father's debt.(1)What color were the two pebbles that the loan shark put into the bag?A.Both white.B.Both black.C.White and black.D.White and red.(2)The underlined word "recognize" in the passage means "________" in Chinese.A.承认B.争辩C.解释D.挑选(3)What is the story's result?A.The daughter married the loan shark.B.The father fought with the loan shark.C.The father had to pay for the debt.D.The daughter wouldn't marry the loan shark.4.(1)The museum is closed on ________.A.MondayB.TuesdayC.FridayD.Sunday(2)What can we NOT learn from the information above?A.Where you can find the museum.B.How many museum guides the museum needs.C.What people can get as volunteers there.D.How to get more information about the museum.(3)If someone wants to know more information about volunteering, he can ________.A.send a letterB.make a call to Miss BrownC.ask the museum's managerD.visit its website5.Susan's Plan(1)Susan ________ from Monday to Friday.A.goes to schoolB.does her homeworkC.watches TVD.goes shopping(2)Susan would like to ________ on Saturday morning.A.stayathomeB.do her homeworkC.go shoppingD.go swimming(3)Susan can see some animals ________.A.on MondayB.on FridayC.on SaturdayD.on Sunday(4)Susan does her homework ________.A.on Saturday eveningB.on Saturday afternoonC.on Tuesday afternoonD.on Sunday afternoon(5)On Monday evening Susan ________.A.has a dance lessonB.reads booksC.watches an English moviesD.watches TV6.(1)Lucy is a good teacher and she wants to find a job. She can call ________ for the job.A.TinaB.JohnC.JaneD.Mr. Smith(2)You can be in the Chinese Character Club for ________ to learn Chinese characters from Monday To Friday.A.2.5 hoursB.3.5 hoursC.4 hoursD.5 hours(3)If you look for a job as a musician, you can________.A.go to Room 212 in School's P. E. BuildingB.send an e-mail to music@163. com.C.call Mr. Smith at 368-5778D.call Jane(4)Who can teach you to play soccer?A.Tina.B.John.C.Jane.D.Mr. Smith.(5)If you want to be a musician, you must ________.A.write Chinese characters wellB.speak English wellC.play an instrumentD.like children very muchMy name is Steve. On weekdays I get up at 6:30. I take a shower, brush my teeth and get dressed. I don't have breakfast at home. I eat a sandwich(三明治)and drink some milk on the bus to school. At about 7:45 I get to school and the first lesson starts at 8:00. I usually have 6 lessons a day. At 11:30, I have lunch in the dining hall. After lunch I do some school activities. I go to the music club or play sports with my friends. School finishes at four o'clock in the afternoon. I usually get home at about 4:30. My first thing to do after school is to do my homework. After that I have some free time. I often watch TV, play on the computer, play with my friends, help my mother with dinner or go shopping with her. At about half past six we have dinner. After dinner I usually do some reading. Reading is my favorite hobby(业余爱好). After about one and a half hours' reading, I wash my face and brush my teeth. Then I go To bed at 9:30.(1)When does Steve get up on weekdays?A.At 5:30B.At 6:00C.At 6:30D.At 7:00(2)How does Steve go to school?A.By bike.B.On foot.C.By subway.D.By bus.(3)What does Steve do after lunch in the school?① He plays sports.② He cleans the classroom.③ He goes to the music club.④ He draws pictures.A.①②B.①③C.②④D.③④(4)What's Steve's first thing to do after school?A.Help his mom with dinner.B.Do his homework.C.Have dinner.D.Watch TV.(5)How long does Steve read before he goes to bed?A.For 30 minutes.B.For all hour.C.For 90 minutes.D.For two hours.8.Many young people can't care for themselves well after leaving home. They can't even wash a pair of socks. I don't want to be a person like that. I want to be more independent.When I was only seven years old, I liked cooking with my mother in the kitchen. I learned how to cook from my mother there, and she was really interested in teaching me. Before my mother got married, she didn't know how to cook, because my grandmother didn't allow(允许)her to cook. My mother did not start cooking until she was 25 years old. At the beginning, it was difficult for her. She had to take cooking lessons. She decided to teach me when I was young, because she didn't want me to have the same experience as she did.And now I can do many chores by myself. I can wash my own clothes, and sometimes I do that for my parents and my brother. When my parents get out, I can cook meals for myself and my brother.(1)The writer's mother learned cooking by ________ at the beginning.A.learning from her motherB.reading booksC.taking cooking lessonsD.learning from her daughter(2)The underlined word "married" in Paragraph 2 means ________.A.出生B.毕业C.结婚D.退休(3)The writer mainly wants to tell us ________.A.when his mother learned to cookB.his mother taught him how to cookC.the earlier kids learn to be independent, the better it is for their futureD.he could cook and do many chores by himself9.Tammy's body was shaking! Today was her first trip to the dentist. She didn't know what to expect. What would happen? Would it hurt? Would she shout?Mom said it wasn't scary at all, but Tammy didn't know. How bad would it be? The dentist would clean her teeth. Then he would take pictures of her teeth to see if they were rotten(腐烂的).That didn't sound too bad. She cleaned her teeth at home already. She liked to smile(笑). She wanted clean teeth and didn't want rotten teeth. Pictures and cleaning sounded OK with her.At the office, many people were waiting. There was a fish tank(鱼缸)to look at and magazines to read. She chose a magazine and found it interesting. She didn't have to wait long, though. Soon it was her turn.The dentist was a kind, old man. He smiled and Tammy sat in a special chair. There were lots of lights and tools(工具). It didn't make her comfortable when she opened her mouth. He looked really closely. He cleaned her teeth carefully and then took pictures of her teeth. Then she was done.That was it? That wasn't that scary. The dentist told her that she needed to come back again in six months. "Sure. I will. I can come by myself!" Tammy smiled.(1)From the three questions in Paragraph 1, we can know Tammy was________.A.boredB.worriedC.surprisedD.excited(2)What did Tammy do when she waited at the office?A.She watched fish.B.She read a magazine.C.She talked with her mom.D.She played with other kids.(3)As for the next meeting with the dentist, Tammy planned to come________.A.aloneB.with her momC.the next weekD.the next month(4)What's the best title for the passage?A.A long waitB.A busy dentistC.Tammy's questionsD.First trip to the dentist10.Riding a bicycle has become very popular these days.My school is far from my house, so I went there by bus for years. I sometimes got there late. This March I asked my father to get me a bicycle so that (以便)I might get to school on time. And he bought me one some days later.Then the problem was how to ride the bicycle. One of my friends lives next door. He helped me learn how to ride. He took me to a school playground and demonstrated(示范)how to ride to me. When it was my turn to ride, he ran with me. He did that to make sure he would be there when I was falling off. I learned things very quickly and could ride a bicycle without anyone's help after a few days.What fun it is to ride a bicycle! I now go to school on my bicycle. I think a bicycle is the cheapest and quickest means of transport(交通工具)for a student.I make use of my bicycle if a football game is waiting for me in the park. I visit the homes of my friends who live too far away by bicycle. I can also be very helpful to my mother and get vegetables and fruit for the house.What fun it is to fly like a bird on my bicycle!(1)Who bought a bicycle for the writer?A.His father.B.His mother.C.His friend.D.His teacher.(2)The writer learned how to ride a bicycle ________.A.by himselfB.in a few weeks' timeC.with his father's helpD.on a school playground(3)What does the writer think of riding a bicycle?① It's cheap. ② It's hard. ③ It's quick. ④ It's fun.A.①②③B.①②④C.①③④D.②③④参考答案1.【答案】CDBB【解答】(1)C 细节理解题。

人教版小学数学四年级下册重难点突破试题全套

人教版小学数学四年级下册重难点突破试题全套

人教版小学数学四年级下册重难点突破试题全套重难点突破卷1一、数学技能1.0.07的计数单位是百分之一,再加上100个这样的计数单位是1.2.0.354.3.8.原数是0.08,去掉小数点后为8.4.0.99,它与1相差0.01.5.“7”在整数位上,表示7,“6”在百分位上,表示六十分之六。

6.12.25米。

7.(1)1.6 (2)0.68,0.56.二、数学知识1.×,6.800是三位小数,不能说是一位小数。

2.√,3.203精确到百分位约是3.2.3.×,小数加减法要把小数点对齐,而不是末位数字。

三、选择题1.C,整数部分是0的小数一定比1小。

2.C,共有8个一位小数。

3.A,正确的差是14.42.四、计算题1.10.3÷100=0.1032÷1000=0.0021.8×10÷100=0.18360÷100×10=36015-0.3=14.76-0.5=5.53.9+12.1=162.13+4=6.132. 64.7 36.8101.5 25 4.7320.27 37.9 2.6340.53 10.1 3.826.283.45.36+(83.4-15.07)=113.6967.39-(12.67+17.39)=37.334.5+3.8+15.5=23.842×101=4242五、应用题1.竹竿的长度为0.5+0.86=1.36米,池中水深为4-1.36=2.64米。

2.(1)需要题目给出的价格才能计算。

2)例如:XXX每天花费1.5元买牛奶,他一个月喝了多少钱的牛奶?答案:45元。

一、我会填。

(每题4分,共24分)1.XXX家有兔和鸭若干只,从上面数有10个头,从下面数有28只脚,兔有(4)只,鸭有(6)只。

2.2元和5元的人民币共9张,合计33元,2元的有(6)张,5元的有(3)张。

1.XXX家有兔和鸭若干只,从上面数有10个头,从下面数有28只脚。

2023年中考物理重难点突破专题一:光学作图

2023年中考物理重难点突破专题一:光学作图

2023年中考物理重难点突破
10.(2021重庆)在凸透镜
光路图
说明
平行于凸透镜主光轴的光线,经过凸透 镜后过另一侧的焦点。
凹透镜
从凸透镜焦点发出的光线,经过凸透镜 后平行于主光轴。 经过凸透镜光心的光线,传播方法不改 变。 平行于凹透镜主光轴的光线,经过凹透 镜的反向延长线交于同侧焦点。
射向凹透镜另一侧焦点的光线,经过凹 凸镜后,平行于主光轴。
专题一 光学作图
2023年中考物理重难点突破
一、光的反射作图 作图依据:光的反射定律 【例题1】(2022黔西南)阳光与水平面成60°角
射向地面,用平面镜使阳光竖直射入井底,在图中 画出平面镜的位置,并标明反射角的度数。
2023年中考物理重难点突破
【分析】因为太阳光竖直射入深井内,所以反射光线竖直向下,画 出法线,过入射点画出法线的垂线,即平面镜的位置;因入射光线 与水平面成60°,而反射光线是竖直向下的,所以入射光线与反射 光线的夹角为60°+90°=150°,则入射角、反射角为75°。如 图所示:
轴的光线经凸透镜折射后的光线。
2023年中考物理重难点突破
【分析】入射光线平行于凸透镜的主光轴,根据凸 透镜的三条特殊光线可知:平行于凸透镜主光轴的 光线,经过凸透镜后过另一侧的焦点。所以将入射 点与另一侧焦点相连并延长即可,如下图所示:
2023年中考物理重难点突破
【突破】透镜的三条特殊光线
【突破】对于光的反射作图,运用数学上做等角的方法 即可,但必须以法线为始边。注意箭头的方向:入射时 指向反射面;反射时,离开反射面;法线做成虚线,且 需垂直于反射面,过入射点。确定反射角的读数时,依 据反射角等于入射角;法线为反射光线与入射光线组成 的角的角平分线。

专题突破高二化学重难点专题突破(人教版2019选择性必修1)(1)

专题突破高二化学重难点专题突破(人教版2019选择性必修1)(1)

[提升2]工业生产中产生的SO2废气常用NaOH吸收。25℃时,用0.1 mol·L-1NaOH 溶
液滴定20 mL 0.1 mol·L-1H2SO3,溶液pH的滴定曲线如图。下列说法错误的是(
A.若a点时c(H2SO3)=c(HSO3-),则Ka1(H2SO3)=10-
B.滴定时,可用甲基橙作为b点的终点判断指示剂
选择性必修1(人教版2019)
2023-2024学年
第三章
水溶液中的离子反应与平衡
水溶液中的三类离子反应图像
突破点1:滴定曲线分析
酸碱滴定曲线是以酸碱中和滴定为载体,通过酸碱滴定过程的分析,综合考查指示
剂的选择、水的电离程度变化、溶液导电性变化、溶液温度变化、电离常数计算、
离子浓度大小比较、离子浓度守恒关系等。
选D。
(
)
【解析】若a点pH=4,(H+)=10-4mol·L-1,溶液呈酸性,根据方程式知c(HClO)=c(Cl-)c(ClO-),c(Cl-)= mc(ClO-),则c(HClO)=(m-1)c(ClO-),
Ka(HClO)=
cH

c ClO
c HClO

c H c ClO
= m 1
c ClO
10 4

m 1
,A错误;若x=100,氯水恰好与
NaOH溶液完全反应生成NaCl、NaClO,NaClO水解生成次氯酸,溶液呈碱性,但次氯酸具有
漂白性,不能用pH试纸测pH,应选pH计测量,B错误;b~c段,随NaOH溶液的滴入,溶液的pH


不断增大,溶液中c(H+)减小,温度不变则Ka(HClO)=
3 )+c(OH ),c 点 pH=7.19,

一年级下册《总复习》重难点突破(第1课时)

一年级下册《总复习》重难点突破(第1课时)

一年级下册《总复习》重难点突破(第1课时)1.全面回顾、梳理、总结所学知识,初步了解总复习的方法突破建议:(1)复习时,可以先让学生自己想一想本学期学习了哪些知识,然后在小组中互相说一说,并进行相互补充。

最后,教师带领学生一起梳理,帮助学生经历复习的基本过程,感受复习的基本方法,养成梳理知识的习惯。

(2)利用多种形式的表征突出结构性。

如复习时教师可以在黑板上写一个数(45),以“看到这个数你想到了什么?”引领学生复习。

学生可以想到:有45个苹果(基数意义);第45个人(序数意义);4个十和5个一(组成);46前面的那个数或44后面的那个数(数的顺序);四十五(读法);十位上有4个珠子、个位上有5个珠子等等。

还可以想到关于45的运算,如得数是45的加、减法,45加、减一位数,45加、减整十数等。

还可以想到45在生活中的运用等。

2.提高计算能力以及运用所学知识解决简单实际问题的能力突破建议:(1)计算的整理和复习可以采取单一性训练和对比性训练。

如78-30、65-40、82-20等直接口算的单一性训练;如把58-30与58-3放一组,把67-20与67-2放一组进行对比训练,让学生理解虽然减的数中都有3,但由于3所在的位置不同代表的意思不同,体会只有相同的计数单位上的数才能相加、减。

还可以把像14-8、24-8、34-8、44-8、54-8、64-8、74-8、84-8、94-8这样的算式分成一组,让学生先计算,再观察被减数、减数、差之间的变化规律,提高学生计算的正确率。

(2)将计算的复习、人民币的复习、分类与整理的复习等与解决简单的实际问题相结合,通过解决简单的实际问题进一步巩固知识,并加深对知识的理解。

3.增强学习数学的兴趣突破建议:(1)关注学生情感态度的培养,可让学生说说在学习过程中有趣的或者印象深刻的事情有哪些,说说自己用学到的知识解决了哪些问题,有哪些新发现等,让学生感受学习数学的乐趣,获得积极的情感体验。

八年级物理(上)重难点突破1:控制变量法

八年级物理(上)重难点突破1:控制变量法

八年级物理上重难点专题突破1-----控制变量法阅读提升:1、控制变量法:自然界发生的各种现象,往往是错综复杂的。

决定某一个现象的产生和变化的因素常常也很多。

为了弄清事物变化的原因和规律,必须设法把其中的一个或几个因素用人为的方法控制起来,使它保持不变,然后来比较,研究其他两个变量之间的关系,这种研究问题的科学方法就是“控制变量法”。

初中物理实验大多都用到了这种方法,如通过导体的电流I 受到导体电阻R 和它两端电压U 的影响,在研究电流I 与电阻R 的关系时,需要保持电压U 不变;在研究电流I 与电压U 的关系时,需要保持电阻R 不变;影响压力作用效果的因素、影响液体蒸发快慢的因素、探究声音产生的因素、探究液体内部压强的规律、比热容概念的引入等。

2、转换法:一些看不见,摸不着的物理现象,不好直接认识它,我们常根据它们表现出来的看的见、摸的着的现象来间接认识它们。

如根据电流的热效应来认识电流大小,根据磁场对磁体有力的作用来认识磁场等。

3、等效法:在研究物理问题时,有时为了使问题简化,常用一个物理量来代替其他所有物理量,但不会改变物理效果。

如用合力替代各个分力,用总电阻替代各部分电阻,浮力替代液体对物体的各个压力等。

4、类比法:在认识一些物理概念时,我们常将它与生活中熟悉且有共同特点的现象进行类比,以帮助我们理解它。

如认识电流大小时,用水流进行类比。

认识电压时,用水压进行类比,用水流(压)类比电流(压);用水波类比声波。

5、建立理想模型法:在研究磁体的磁场时,引入“磁感线”的概念、表示模型(如太阳系模型);理论模型(如理想气体模型);想象模型(如电场线、磁感线等力线的模型);数学模型(如空间点阵模型)。

控制变量法专题训练例题1:小敏、小颖和小青在玩荡秋千时,感到秋千往返摆动时间有规律。

于是对“哪些因素决定秋千往返摆动的时间”提出下列猜想,小敏猜想:可能由秋千的绳长决定;小颖猜想:可能由人与秋千坐垫的总质量决定;小青猜想:可能由秋千摆动幅度(摆动中人离开中心的最大距离)决定。

人教版三年级数学上册期末复习重难点突破试题含答案3套

人教版三年级数学上册期末复习重难点突破试题含答案3套

人教版三年级数学上册期末复习重难点突破试题含答案3套期末总复习重难点突破卷1拼后的周长与周长的逆运算一、用彩笔描出下列图形的周长。

(4分)二、我会填。

(每空2分,共18分)1.一个正方形的周长是2分米,它的边长是()厘米。

2.一个长方形的宽是5厘米,长是宽的2倍,它的周长是()厘米。

3.一个正方形和一个长方形的周长相等,如果长方形的长是7米,宽是5米,那么这个正方形的边长是()米。

4.下面图形的周长是()分米,列出算式是()。

5.一个长方形的两条相邻边的和是20分米,它的周长是()分米。

6.一个正方形的周长是()米,它的边长是8米。

7.2个边长是4厘米的正方形拼在一起,拼成的图形是()形,它的周长是()厘米。

三、我会辨。

(每题2分,共8分)1.一个正方形的边长是2厘米,3个这样的正方形拼在一起后的图形的周长就列式为2×4×3。

()2.一个长方形的周长是10分米,宽是2分米,求它的长,可以列式是10÷2-2。

()3.用3个相同的正方形去拼长方形,只有一种拼法。

()4.用2个完全一样的长方形去拼图形,只有一种拼法。

()四、我会选。

(每题4分,共12分)1.一个正方形的周长是4米,它的边长是()。

A.1 B.16米C.16 D.1米2.用12个边长是1厘米的正方形拼成一个大长方形,周长最短的长方形()。

A.长12厘米,宽1厘米B.长6厘米,宽2厘米C.长4厘米,宽3厘米3.观察下面两幅图的周长,结论正确的是()。

第一幅第二幅A.两幅图的周长都一样长B.两幅图的周长都不一样长C.只有第一幅图的周长一样长五、计算下列图形的周长。

(每题6分,共18分)六、我会应用。

(每题10分,共40分)1.一根铁丝正好可以围成一个边长是8厘米的正方形。

如果用这根铁丝围成一个长10厘米的长方形,这个长方形的宽是多少?2.有两个完全相同的长方形,长是10厘米,宽是5厘米。

(1)聪聪用它们拼成了一个长方形,这个长方形的周长是多少?(2)明明用它们拼成了一个正方形,这个正方形的周长是多少呢?3.学校举行“我与可爱的小动物”画展,三年级选出20幅作品,每幅作品都是边长为2分米的正方形,现在要把这些作品贴在一起,并在四周贴上花边,怎样设计才能使贴的花边最少?4.一张长12厘米、宽8厘米的长方形纸板,若把它剪成4张同样的小长方形纸板。

  1. 1、下载文档前请自行甄别文档内容的完整性,平台不提供额外的编辑、内容补充、找答案等附加服务。
  2. 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
  3. 3、如文档侵犯您的权益,请联系客服反馈,我们会尽快为您处理(人工客服工作时间:9:00-18:30)。

重难点突破练习(1)英语学科考试时间:2020.1.21考试时间:60分钟总分:100分一.单项选择(1-10题为每题1分,11-30为每题2分,共50分)1. Things of ____kind come together; people of ____ kind fall into ____ same group.A. a, the, theB. a, a, theC. the, the, theD. a, a, a2. ____ teacher of my grandfather’s will come tomorrow. I’m wondering how old ____ man he should be.A. The, aB. A, aC. A, theD. The, the3. Even on holidays, he preferred doing something ____ doing nothing.A. withoutB. thanC. rather thanD. to4. Her hair became gray ___ the passing of the years.A. inB. forC. atD. with5. I won’t go unless______A.to inviteB.to be invitedC.invitedD. being invited6. ________,she doesn’t work hard.A. Being honestB. To be honestC. HonestD. Honesty7. At six o’clock in the evening when a cat ran through a truck it narrowly escaped ____ over.A. runningB. to be runC. from runningD. being run8.A special committee will________ the air crash.A look atB look forC look intoD look after9. I think that it is the experience ___ he has gained while working abroad during the 1990s ____ has made him succeed in managing the company.A. that, whichB. /, thatC. with which, thatD. which, which10. It was in the small house ___ was built with stones by his father ____ he spent his childhood.A. which, thatB. that, whereC. which, whichD. that, which11. ---Are all the titles of the articles_____ in the contents?---Yes, all ____.A.listed; includedB. listing, includesC. listed, includingD. being listed, being includedA.stickingB. adoptingC. accustomingD. adapting12. We believe __ you have devoted yourself ____ sure to come true.A. that, isB. all that, to beC. that all, areD. what, to is13. With the prices ____, people in poor areas find it difficult to ____ proper health care.A. rising, have access toB. raising, have access toC. raised, have accesses toD. rose, have access to14.--- How are you doing now?--- Very well. I am __ to college life quite easily.15.—My old tyre exploded,can you________ it with a new one? —Certainly,wait a minute.A.take the place of B.replace C.take place D.in place of16. She likes to use words ______ is clear to her.A. of which the meaningB. of which meaningC. whose of meaningD. meaning of which17.The river ________ at least 50 meters in width can be swum acrosswithin minutes.A.measuredB. measuresC. measuringD.being measured18. I’d like to take some pictures ____ stands the old tower.A. whereB. thatC. at whichD. there19.I’m wondering ___ it is ____ has made Irene ___ she is today.A.what; what; thatB. what; that; whatC. what; that; thatD. that; that; what20. It is ____ that he is a writer of ___.A. sure, hopeB. certain, hopeC. certain, promiseD. sure, promise21. The new president will ______ his new responsibility in three days.A. accessB. assureC. assumeD. address22. The boy first showed ______ as an athlete in grade school.A. phenomenonB. possessionC. promiseD. principle23. Nowadays, many people walk or cycle to work the government calling for living a low-carbon lifestyle to deal with global warming.A. in charge ofB. in relation toC. in addition toD. in response to24. The headmaster will a speech to the visiting foreign teachers this afternoon.A. declareB. accelerateC. addressD. applaud25. After the professor _______ the project made a comment on the report, the media all focused on it, causing a heated discussion nationwide.A. opposed to carrying outB. opposed carrying outC. was opposed to carrying outD.was opposed carrying out26. “Why did he let you repeat his instruction time and time again?”“____ that I remembered what was __ after he went out.”A. To make sure, to doB. Making sure, to be doneC. To see to it, to be doneD. seeing to, done27. News reports say peace talks between the two countries have __ with no agreement reached.A. turned downB. held downC. choke downD. broken down28.I kept __ the incident, asking myself again and again how it could have happened.A. chewing onB. sticking toC. referring toD. relying on29. True human happiness should be, as he _______, complete.A. made itB. got itC. put itD. named it30. In desperation, Mrs Jones had to ______ an operation on her right knee to relievethe pain.A. contribute toB. correspond toC. subscribe toD. submit to二.语法填空(共两题,每题15分,每空1.5分,共30分)(一)Stress: Good or Bad?Stress used to be an almost unknown word, but now that we are used to talking about it, I have found that people are beginning to get stressed about being stressed.In recent years, stress 31 (regard) as a cause of a whole range of medical problems, from high blood pressure to mental illness. But like so many other things, it is only too much stress32 does you harm. It is time you considered that if there were no stress in your life, you would achieve a little. If you are stuck at home with no stress, then your level of performance will be low. Up to a certain point, the more stress you are under, the 33 (good) your performance will be. Beyond a certain point, though, further stress will only lead34 exhaustion, illness and finally a breakdown. You can tell when youare over the top and on the downward slope, by asking yourself35 number of questions. Do you, for instance, feel that too much is being expected of 36 , and yet find it impossible to say no? Do you find yourself getting impatient or37 (annoy) with people over unimportant things? If the answer to all those questions is yes, you had better 38 (control) your stress, as you probably are under more stress than is good for you.To some extent you can control the amount of stress in your life. Doctors have worked out a chart showing how much stress is involved in a 39 (various) of events. Getting married is 50, pregnancy 40, moving house 20, Christmas 12, etc. If the total stress in your life is over 150, you are twice as likely40 (get) ill.(二)take care of us.complete stop.43.____________ (weigh)126 kilos, the woman had great difficulty walking about.45.__________(fight) against cancer for many years, Steve Jobs, the co-founder of Apple, who died at the age of fifty-six, made technology fun.47.___________(compare) to her sister, she was indeed very fortunate and happy.factory was going to shut down.for his country.三.短文改错(共两题,每题10分,每处错误一分,共20分)(一)I am grateful to my English teacher Susan, at whose help I couldn't have won first prize in the English Talent Competition for high school students last week.I used to be poorly in speaking English. I was too shy to speak in class. Since she teaches us last term, she has been encouraging him to overcome fear and speak out in class. Thanks to her, I have made great progresses. Besides, I practiced severaltime in the front of her.It was her advice which made me a better speaker and full of confidence.Nevertheless, I owe my success to her.Susan set a good example to me. I am determined to become an English teacher when I grow up.(二)Here are good news for you. A famous Opera, Butterfly Lovers, will put on this Saturday. Butterfly Lovers is one of the most traditional love story. I know you show great interest in Chinese culture, especially for the local operas. I hope this opportunity will not only make you happy, but also satisfies your interest in Chinese opera. If you can come, I suggest have a look at the museum near the theater after watching the opera. There, I believe, I can know the history of many Chinese operas, which can decrease your command of knowledge about Chinese traditional operas. I'm looking forward to receiving your earlier reply.。

相关文档
最新文档