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中学生习题

发布时间:2020-11-28 00:47:04

『壹』 中学生习题网的无纸化

网络化通用无纸化作业系统是在现有网络环境下,根据教师和学生的计算机实际操作能力和实际教学要求设计的,在系统设计过程中,我们主要制定和遵循了以下设计目标: 1. 体现自主学习要求 学生在完成作业的过程中根据自己的需要随时安排学习时间,机动灵活。 系统允许学生在完成作业后立即进行计分和作业分析而不需要教师参与,学生可以自行检查作业完成情况并明确自己尚未完全掌握的内容,适于自主学习条件下使用。 2. 满足现实教学需要 本系统可以支持四种客观题型、三种主观题型。可以支持的这七种题型为:填空题、单项选择题、是非题、多项选择题、计算题、应用题、证明题。由于每种题型的名称可以任意改变,因此对于不属于上述七种的题型,只要操作过程相同就可以支持。 3. 实现公正评判成绩 首先,本系统按照知识点出题,确保了每份作业都能完全覆盖所学内容,不重不漏。其次,系统每次出题都是随机的,每份作业都不相同,从而杜绝了抄袭现象。最后,由于系统将主观题以客观题的形式表现,因而所有题目的判分都是客观准确的,避免了进行主观题判分时通常存在的随意性。 网络无纸化教育功能: 1.作业题库生成系统:供教师定义作业题型、题量、题分,并将在自己名下的习题生成课后练习供学生使用; 2.作业发布系统:供学生在老师上传的试卷内容下在线完成测试,随题库试卷目录一起提供给学生。每个题库只需要在老师会员名下查找即可; 3.作业及分析系统:供学生进行无纸化作业、检查作业正确答案、保存成绩使用,在学生的用户后台显示; 4.题库管理系统:供学生移动、删除作业题库,随作业及分析系统一起在学生的会员后台; 5.计分系统:供教师汇集、统计学生作业成绩并打印作业总分。

『贰』 初中习题

电功和电功率测试题
(时间:60分钟 满分:100分)
一.填空题(24分)
1.加在阻值为12欧的电阻器两端的电压是伏,5分内电流通过这个电阻做了 焦的功。
2.标有“12V 9W”字样的小灯泡,它的灯丝在正常工作时的电阻是 欧,接到电路中通过它的电流是0.5安,则这盏灯的功率是 瓦。
3.一只额定电压是220伏的灯泡,把它接在电压是110伏的电路上时,实际功率是25瓦,则此灯泡的额定功率是 瓦。
4.某电热器的电阻是50欧,当它的电阻丝通过的电流是4安时,100秒可产生的热量是 焦。
5.1千瓦时的电可供“P2 220—40”的电灯正常工作 小时。
6. 图1,电源电压保持不变,当开关S闭合时,电流表示数为3安,当S断开时,电压表的示数为4伏,R2消耗的功率为8瓦,则电阻R2 = 欧。
7.将电阻为R1的电热器与阻值R2 = 24欧的电阻串联后接在电压一定的电源两端。通电后电热器的实际功率为它额定功率的 ,电路中的电流为1安。若将电热器直接接到电源两端,电热器的功率恰为额定功率,则电源电压等于 伏。
8.电灯L跟电阻R串联后接到电压为10伏的电源上,电路接通后,100秒内电阻R上电流做的功是10焦。已知电灯L的额定功率是10瓦,电阻R的阻值是10欧,电灯的电阻不变,则电灯的额定电压是 伏。
二.选择题(28分)
9.如图2所示的电路中,当滑动变阻器滑片P向右滑动过程中( )
A.电流表示数变小,电压表V1示数变大
B.电压表V1示数不变,灯L亮暗不变
C.电压表V2示数不变,灯L亮暗不变
D.电压表V2示数变大,电流表示数变小
10.把标有“P2 220—40”的甲灯和标有“P2 220——25”的乙灯串联在家庭电路中,则 ( )
A.甲.乙两盏灯的额定电压都变小
B.甲.乙两盏灯均不能正常发光,甲灯比乙灯亮些
C.甲.乙两盏灯均不能正常发光,乙灯比甲灯亮些
D.甲.乙两盏灯均不能正常发光,乙灯的实际电压比甲的大
11.分别标有“6V,2W”和“12V,8W”的两个灯泡,串联后接在电路中,为使其中一个恰能正常发光,加在电路两端的电压应是( )
A.6V B.12V C.18V D.24V
12.额定电压相同的甲.乙两灯,串联后接在某电路中,甲灯比乙灯亮,正列说法正确的是( )
A.甲灯的额定功率和实际功率都大 B.乙灯的额定功率和实际功率都大
C.甲灯的额定功率小,实际功率大 D.乙灯的额定功率小,实际功率大
13.某电路两端电压保持不变,若电路中只接一个电阻R1,电路中的电流为I,消耗的功率为P1,若在R1上并联一个电阻R2时,干路中的电流为2I,电路消耗的功率为P2,测P1:P2( )
A.1:2 B.2:1 C.3:1 D.1:3
14.将定值电阻R1单独接在电压不变的电源上,消耗的功率是20瓦,另一个定值电阻R2单独接在这个电源上消耗的功率是R1消耗功率的1.5倍,若将R1和R2串联接在这个电源上,则这个电阻消耗的总功率是( )
A.50瓦 B.25瓦 C.12瓦 D.10瓦
15.如图3,电源电压保持不变,当S1闭合,S2打开时,电流表的示数是I1,电阻R1的功率是P1,R1和R3消耗的功率之比是2:1;当S1打开,S2闭合时,电流表示数是I2,电阻R2的功率是P2,已知I1 : I2 = 2:3,则:( )
A.R2 : R3 = 2:1 B.R2 : R3 = 1:2
C.P1 : P2 = 8:9 D.P1 : P2 = 4:9
选择题答案卡
题号 9 10 11 12 13 14 15
答案

三.作图、实验题(用伏安法测电阻):(共24分)
16.将图4中的电压表、电流表接入电路(5分)

17.在下面的方框内画出电路图(5分)
18.闭合开关时,滑片P应置于变阻器的 端。(填“左”或“右”)(3分)
19.开关闭合后,电流表、电压表示数如图5所示,由此可知,电路中的电流I = 安,电阻R = 欧。(6分)
电路图

20.请设计一个纪录该实验数据的表格(5分)

四.计算题(24分)
21.一个标有”220V 100W”字样的灯泡,
(1) 接在220V电压的电路上,它的电阻是多少?(4分)
(2) 接在110V的电路上时,它的实际功率是多少? (4分)

22.一个标有“6V 3W”字样的灯泡与滑动变阻器串联,若接在电源电压为12V的电路里,滑动变阻器调至多大时,才能使小灯泡正常发光?(6分)

23.如图6所示,当开关S接到a处时,电压为4伏,电流表示数为0.5安,灯泡正常发光。当开关S接到b处时,电压表示数为6.4伏,电流表示数为0.4安。设电源电压不变,求:
(1) 灯泡L的额定电功率?(5分)
(2)开关接到b处时,灯泡L的实际电功率?(5分)

英语试卷

(考试时间为100分钟,试卷满分为100分)

班级________ 学号_________ 姓名________ 分数________

第二部分 笔 试(40分)
五、语言知识运用(1)
(一)单项填空(共15分,每小题1分)
从下列各题中所给的四个选项中选择可以填入空白处的最佳选项。
21. Happy Teachers’ Day! Here is _______ card with our best wishes.
A. a
B. an
C. the
D. /

22. I’m sorry I’m late,because the traffic _______ bad.
A. is
B. are
C. am
D. be

23. –Do you like mooncakes?
–Yes. And I think the ________ with nuts are the nicest of all.
A. these
B. those
C. them
D. ones

24. Dolphins are ________ to people. If you fall into water,they may help you.
A. friendship
B. friendly
C. friends
D. friend

25. He is good at English and he can speak English very ________.
A. good
B. nice
C. well
D. fine

26. John’s family live ________ the countryside.
A. for
B. in
C. on
D. by

27. ________ people walk,Cody likes to follow them.
A. Because
B. Before
C. When
D. After

28. I think living in a town _______ quite interesting.
A. sounds
B. sound
C. sounded
D. is sounded

29. What is Tommy going to ________ about next time?
A. talks
B. talking
C. talk
D. talked

30. Keep your heart ________,you will find all the people are lovely and kind.
A. open
B. opened
C. opening
D. to open

31. Listen! Someone ________ next door.
A. sing
B. is singing
C. sings
D. is gong to sing

32. His name is Jack Black. What do you call him?
A. Mr Jack.
B. Mr Black.
C. Mrs Jack.
D. Mrs Black.

33. –What do you usually do on Saturday morning?
–I usually ________.
A. do lessons
B. begin lessons
C. study lessons
D. have lessons

34. He often gets ________ at 7:00 p.m. each day.
A. to home
B. at home
C. home
D. in home

35. They find it difficult to _________the difference between English and Chinese.
A. tell
B. speak
C. say
D. talk

(二)完形填空(共10分,每小题1分)
通读下面的短文,掌握其大意,然而从短文后各题所给的四个选项中选择能填入相应空白处的最佳选项。
Most people go to school 36 ecation. They learn many subjects just like English,maths,history. 37 go to school to learn a skill so that they can make a 38 . School ecation is very important and 39 . Yet, 40 one can learn 41 from school. A teacher can’t teach his students everything. The teacher’s job is to 42 his students 43 to learn. The teacher teaches them how to read and how to think. So the students 44 should learn much 45 outside school.

36. A. in B. of C. at D. for
37. A. Other B. The others C. Others D. The other
38. A. live B. living C. life D. lives
39. A. useful B. use C. uses D. use of
40. A. some B. any C. no D. only
41. A. something B. anything C. nothing D. everything
42. A. give B. tell C. show D. say
43. A. where B. how C. when D. why
44. A. they B. them C. themselves D. their
45. A. many B. much C. some D. more

六、阅读理解(共15分,每小题1分)
阅读下面A、B、C、D四篇短文。根据短文内容从每题所给的四个选项中选择最佳选项。
(A)
Water is very important to living things. Without water there can be no life on the earth. All animals and plants need water. We need water to drink,to cook our food and clean ourselves. Water is needed in offices,factories,and schools. Water is needed everywhere.

There is water in seas,rivers and lakes. Water is found almost everywhere. Even in the driest part of the world,there is some water in the air. You cannot see or feel it when it is a part of the air. The water in the seas,rivers and lakes is liquid(液体). The water in the air is a gas,and we call it water vapour(蒸汽).

Clouds are made of water. They may be made of very small drops of water. They may also be made of crystals(结晶体). Snow crystals are very,very small crystals of ice. Ice is frozen water. It is a solid(固体). There can be snow and ice everywhere in winter.

46. Where can we find water?
A. We can find water when it turns into vapour.
B. Water can be found almost everywhere.
C. We can see water in deserts here and there.
D. Water is only in seas and rivers.

47. We can drink water when it is _________.
A. liquid
B. a solid
C. in the air
D. turned into ice

48. Clouds are made of _________.
A. seas,rivers and lakes
B. blocks of ice
C. very small drops of water or snow crystals
D. water in its solid state
(B)
Mrs Jones gave music lessons at a school. She had a good voice and enjoyed singing,except that some of her high notes sounded like a gate that had been forgotten to oil. Mrs Jones knew that so well that she tried to practice these high notes if she was free. As she lived in a small house,she usually had to go for long walks along the country roads and practised high notes there. Every time she heard a car or a person coming along the road,she stopped and waited until she could no longer be heard before she started practicing again.

One afternoon,a car came up behind her so fast that she didn’t hear it until it was only few meters from her. She was singing some of her highest and most difficult notes at that time when the car passed. The driver stopped his car in front of her suddenly,jumped out and began to look at his car carefully. To his great surprise,he couldn’t find anything wrong with his car. He got back into the car and drove off.

49. Mrs Jones was __________.
A. a music teacher
B. an office worker
C. a school bus driver
D. a singer

50. If she heard a car or a person coming,she would __________.
A. go for a walk along the country road
B. stop singing and wait
C. keep on practicing those high notes
D. make a sound like a gate that had been forgotten to oil

51. It was difficult for the woman _________.
A. to sing lowest notes
B. to sing the highest notes
C. to have a good voice
D. enjoy singing

52. Why did the driver stop his car suddenly?
A. Because he drove too fast.
B. Because he wanted to say hello to Mrs Jones.
C. Because he enjoyed Mrs Jones’ voice.
D. Because he thought that his car was in trouble.
(C)
When you are reading something in English,you may often come across a new word. What’s the best way to know it?

You may look it up in the English-Chinese Dictionary. It will tell you a lot about the word: the pronunciation,the part of speech,the Chinese meaning and also how to use this word. But how can you know where the word is in thousands of English words? How to find it in the dictionary both quickly and correctly?

First,all the English words are arranged in the alphabetical order. In the dictionary you can first see the words beginning with the letter A,B,C,D,E…That means,if there are two words “desert” and “pull”,“desert” will be certainly before “pull”. Then if there are two words both beginning with the same letter,you may look at the second letter,then the third,the fourth,… For example,“pardon” is before “plough”,“judge” before “just” etc.

53. When you don’t know a word,the best way is _______.
A. to ask your teacher
B. to look it up in a dictionary
C. to think hard
D. to do nothing

54. When you look up a word in the English-Chinese Dictionary,you should understand not only its Chinese meaning,but also ______.
A. its pronunciation
B. its part of speech
C. the use of it
D. A,B and C

55. Here are four words,“blind”,“murder”,“monument” and “boyhood”. Their right order in the English-Chinese Dictionary is ________.
A. blind,boyhood,murder,monument
B. blind,boyhood,monument,murder
C. boyhood,blind,monument,murder
D. monument,murder,blind,boyhood

56. The English-Chinese Dictionary is ________.
A. useful in learning Chinese
B. our good friend in learning Chinese
C. our good friend in learning English
D. not useful in learning English
(D)
Some people like to fish. Some like to build things. Others like to paint. George Washington Carver liked to grow things. He was happy when he was with flowers and plants. He liked farming.

Farmers of the south were glad that George Washington Carver felt this way. Thanks to Mr Carver,they grew good crops. Once southern farmers only planted cotton. But George Washington Carver said to them,“Plant peanuts. They will make your land rich. Your other crops will grow better.” The farmers listened to him. They planted peanuts. Then they came to him again. Where could they sell thousands of peanuts?

Once again,George Washington Carver helped them. He found hundreds of ways for using peanuts. Butter and candy could be made from peanuts. Soap,oil,paint,and many other things would be made form peanuts,too. George Washington Carver was a black man. Today his work is known all over the world.

57. George Washington Carver liked to ________.
A. plant things
B. paint
C. fish
D. build things

58. Southern farmers liked Mr Carver because Mr Carver ________.
A. was a black man
B. was a farmer
C. helped them in farming
D. was happy when he was with flowers

59. From the story we can tell that _________.
A. Mr Carver is not well known now
B. southern farmers thanked Carver for cotton
C. southern farmers sold peanuts to Carver
D. George Washington Carver was a great scientist

60. The main idea of the whole story is that _________.
A. George Washington Carver helped the southern farmers
B. George Washington Carver is known as a black man
C. many things can be made from peanuts
D. planting peanuts can make land rich
第 II 卷
(非机读卷 共35分)
一、根据句意及首字母,补全单词。(共4分,每小题1分)
1. Her job is to sell clothes in the shopping center,she is a s_________.

2. English people’s family names come l__________.

3. All the students are out. N________ is at school.

4. They’re walking home after p________ oranges.

二、选用方框中词或词组的适当形式填空。(其中有两个是多余的)(共3分,每小题1分)
exciting,careful,top,celebrate,taste

1. The ______ of the mountain is a good place for seeing the sun rising.

2. The soup _________ so delicious! Would you like some?

3. He writes much _____________ than me.

三、语言知识运用(2)(共10分,每小题2分)
根据中文意思完成句子。
1.我很高兴你能来。
I’m __________________________________________.

2.谢谢你的卡片。
_____________________________________________your card.

3.火车站距离这条街有五公里远。
______________________________________ from the street.

4.对你来说按时到校很容易做到。
It is easy_____________________________________________.

5.同学们都认为他不会弹钢琴。
___________________________________________play the piano.

四、口语交际(共10分,每小题2分)
根据上下文的意思补全对话。在横线上写出所缺少的内容。
A: Hello. ____1____
B: Speaking.
A: Hi,David! This is John.
B: Hi,John. ____2____
A: We’re going to have a picnic this Saturday. ____3____
B: I’d love to. But I have to help mum with the housework.
A: What a pity! Are you free this Sunday?
B: Yes.
A: ____4____
B: That’s a good idea. I hear there is a good movie on show now.
A: ____5____
B: How about 6:00 p.m. at the gate of the cinema?
A: OK. See you then.
B. See you.

五、书面表达(共8分)
根据中文意思,写出意思连贯、符合逻辑、50字左右的短文。
金秋是收获的季节。进入初二以来你有了什么收获,对自己的下半学期和下半年以后有什么打算?请你用英语来谈一谈你的收获和打算。
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『叁』 中学生习题网的题库目录

高中物理必修一、高中物理必修二、高中物理选修1-1、高中物理选修1-2、高中物理选修2-1、高中物理选修2-2、高中物理选修2-3、高中物理选修3-1、高中物理选修3-2、高中物理选修3-3、高中物理选修3-4、高中物理选修3-5。

『肆』 初中练习题怎么练

鄙人给您一些建议
1.练习题一定要做,但一定要精!不要题海战术,这样伤神费力,事倍功半。每科在课外只买一本练习题,把这一本做精了,不会的一定要第二天去问老师,考试前把这里面做错的题再翻一遍,分析下为什么错了,事半功倍。还有就是练习题要选做,一些简单的基础题就可以不做,重点做一些拔高题。中考前的复习题特别多,多到几个月根本做不完,这是选做的作用就体现出来了。
2.英语学科,最重要的就是阅读,中考阅读占40分(我们这边)很大的比例,平时练习时遇到阅读不要逃避,耐心地把它做了,遇到生词,先联系上下文去理解其词义,实在不会的时候在查字典,这个“猜”单词的能力必须培养,因为你不可能面面俱到,认识每一个词汇。不过扩展一定的单词量还是需要的,建议在遇到生词时把它记录下来,每天背单词时把它们一起背了,久而久之英语成绩就上去了。
3.不知你们那里是什么情况,我们这边的政史都是开卷的,平时好好预习,上课认真听讲,作业认真完成,考前翻翻书就完全没问题。至于地理生物……背就是了,我们这边中考不考地理生物……
4.对于“有些人为什么既把作业完成的很好,而且学习特别好?”这个问题,我想说的是,每个人的思维都不一样,别人也许反应快,接受能力强,他们即使回家不学习,考试一样可以考高分。但大多数人没有那样的思维,所以就稳扎稳打,不要羡慕他们,做好自己就行了。
最后我想说,学校的时间极其重要,学校一分钟甚至可以顶回家的十分钟,所以作业一定要尽量在学校全部完成,遇到难题还可以问老师,我们这里是每天2节自习,足够了。回家多扩展下知识,也可以把不懂的写下来,第二天问老师。
打字不易,望楼主采纳。

『伍』 中学生习题网的题库特点

1.教师和编辑双重质量把关 一线优秀教师精心挑选每道试题,并分类、整理、做题审核版、编写解权析。 2.试题分类细致到知识点(小考点) 试题按章、节,甚至知识点及小考点进行分类。分类时,严格以国家课程标准(初中、高中)、考试大纲(考试说明)、教材、配套教参为标准,紧扣教学和考试要求。 3.软件和人工双排重,无重题 试题经过软件自动排重,教师和编辑做题人工2次排重。整个题库几乎没有重复试题。 4.试题配有详细解析 全国各地一线优秀教师编写详细解析。教师可以参考如何与学生讲解,学生可以自行消化理解难题。 5. 试题全面更新,紧跟最新教学和考试形势(包含各地2009—2012年已分类中考、高考真题) 6.以先进软件为平台,实现自动和手动组卷功能,word格式试卷轻松导入导出

『陆』 求推荐比较好的初中练习题

你可以关注广州卓越教育的订阅号,因为最近它们会发一下初中练习题,题目从初版一到权初三的都有,做完之后可以加群对答案。题目包含的知识点比较多,可以比较全面测出孩子薄弱的部分,之后就可以针对孩子薄弱的点进行学习。

『柒』 求<简爱>的中学生练习题,附答案! 3Q

简爱
2.她小时候最抄爱读的一本书?你读过吗?

3、舅妈经常把简爱关在哪里?她为什么那么害怕关在这里?

4、再盖茨海德府唯一让简爱温暖的是谁?为什么?
5、当洛布赫斯特先生为简爱怎样做才能避免进地狱时,简爱是怎么巧妙回答的?表现了简爱怎样的性格?
6、简爱从小就富有反抗精神,你能至少举一例吗?
7、简爱怎么向舅妈反驳自己不是“骗子”的?
8、作者怎么描写简爱向舅妈复仇后的心理?你怎么看待这时的简爱?
9、在伍洛德给简爱带来温暖友爱的是谁?最可恶的人是谁?为什么?
10 、你怎样看待简爱跟罗切斯特的爱情?
11、你认为书中写得最精彩你最喜爱的片段是哪里?请摘抄并为我们作简要分析,与大家
分享吧。
12、假如你是简爱,会怎样?尽情抒发感想吧。
13、当简

『捌』 中学生习题网的企业网语

★我们愿和你共同分享中学生习题网的实用功能! ★中学生习题网与你共同分专享属学习的快乐! ★中学生习题网时时记录你每个成长瞬间! ★中学生习题网伴你走进数字教学时代! ★你去感受过中学生习题网的在线考试吗? ★走,上学生习题网测试去! ★爱学习,更爱习题网! 1、网络的便捷 2、校园的故事 3、解题的灵感 4、时间的记忆 5、成功的秘密 6、天天的积累 7、我们的希望 8、学生习题网 ★ 中学生家长的好帮手-学生在线考试系统 ★最多最全的试题网站-中学生习题网 ★我们每天都在努力 ★一样的习题,不一样的解析, 中学生习题网! ★不一样的习题网,让我们high起来。 ★中学生习题网,伴你靠近梦想!

『玖』 中学生习题


解题过程如图所示

『拾』 中学生习题网的简介

湖北天翼教育科技有限公司长期从事习题、试题收集整理,资源积累丰富,教育信息通畅,全面整合试题资源,题库建设成果显著。只需您一点小小的投入,您再也不需同样付出巨额资金立即即可享受该项成果。湖北天翼教育科技有限公司旗下网站:中学生习题网 方便快捷的浏览和搜索,是评价一个优质习题网的重要尺度。中学生习题网充分考虑到用户的实际需求,人性化的试题布局让你可以轻松地掌握使用庞大资源的秘诀。
中学生习题网将单独的每道试题(题目、答案、解析、提示)作为浏览对象,进入题库,直接就能点击浏览每道题的真实情况,可以将注册、下载这些中间过程统统抛开,直奔主题,让每一分每一秒的宝贵时间都变得有价值。
每道题均依据年级教材、学期、章节(单元)、知识点、题型、难度等六个方面的信息进行分类整理、采集入库。这种布局设置,打破了市场现有同类试题资源“套卷垄断”的局面,充分体现了实用至上的原则。你可以从教材、章节、题型、知识点、难易度等不同角度对试题进行单一的或多元化搜索,这是一个不可忽视的搜索优势,因为从此开始,你已经从被动地接受者转变为真正地拥有并可以自由地支配试题资源的主动者,您就是众多优质资源的主人。在您的领地里,按需找题,对号入座,如同探囊取物般自如! 形式是次要的,内容才是每一个教师、家长、家教、学生最为关注的核心问题,在这一点上,中学生习题网必是教师、家长、家教、学生寻找学习资源的首选。
中学生习题网是完全的正规资源,与鱼龙混杂的同类资源相比,试题表述规范、答案准确,图片、表格清晰,便于编辑加工。题库中近三年的中高考真题全部配有标准答案和完整解析。为充分发掘每道试题的命题要素,全力阐释知识重难点,使知识与训练紧密结合,同步试题后尽量配置合理、流畅的解析,部分试题配置了详解。
试题量大而质优,差错率控制在万分之八以下,基本达到准出版水平。此外,由于以每道试题为单位进行建设,因而摒弃了套卷重题多这一大弊端,大大减少了用户对试题的再加工时间,将用户从重复、单调的找题——选题——加工修改题——做题的链条中彻底解放出来,可以将更多的时间放在对试题本身的利用上。 中学生习题网中呈现的试题与现行教材、学期同步发行,符合一线实际教学需求,免去了网上“过期题”带来的困扰。
为了让用户的课程资源总是领先一步,根据相应的教学、考试动态,试题库会及时、有规律地得到更新,保证你及时获得最新试题资源,让你的教学优势长久立于不败之地。让你觉得,上网找题不再是苦差使,而是一种乐趣,一种追求,一种精神享受! 中学生习题网是一个稳定的资源,是你储存试题资源的“网上保险箱”。您可以尽管放心地使用,不要担心辛苦下载的试题突然丢失后手足无措,试题库会忠诚地为你敞开服务的大门,随时随地帮你找回需要的内容,消除你的后顾之忧。

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