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将循环小数化为分数:整数、有限小数、循环小数都可以化成分数,整数和有限小数化成分数容易,循环小数如何化成分数呢?请看下面的例子. 将循环小数$0.288\ldots $化成分数:将$0.288\ldots $分别乘$10$和$100$,得$2.88\ldots $和$28.88\ldots $,两个得数相减得$26(两个得数小数部分相同)$,而相减所得的$26$应该是$0.288\ldots $的$\left(100-10\right)

#3 · 常错题

今年市委市政府积极推进创建“全国文明城市”工作,市创城办公室为了调查初中学生对“社会主义核心价值观”内容的了解程度\((\)程度分为:“\(A-\)十分熟悉”,“\(B-\)了解较多”,“\(C-\)了解较少”,“\(D-\)不知道”\()\),对我市一所中学的学生进行了随机抽样调查,根据调查结果绘制了两幅不完整的统计图如图,根据信息解答下列问题: \((1)\)本次抽样调查了多少名学生; \((2)\)补全条形统计图和扇形统计图; \

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#5 · 常错题

一批水果的标准质量是$30$千克,超出标准质量记为正,低于标准质量记为负,现记录如下:$+8$,$-9$,$-5$,$+7$,$-8$,$-6$,$+7$,$+10$. $(1)$这批水果总共有多少千克? $(2)$第一天按每千克价格$5$元卖出了这批水果的一半,第二天为了吸引顾客把第一天卖水果的价格降价$20\%$后作为新的价格,卖完了剩下的水果,请计算一下这批水果一共卖了多少钱?

#6 · 常错题

分类讨论思想是数学的重要思想,在学习有理数的过程中,也深有感受$!$ $(1)$当$ab \lt 0$时,若$b \gt 0$,$|a| \lt |b|$,则$a+b \_\_\_\_\_\_0$; $(2)$当$abc \lt 0$时,若$ab \gt 0$,则$c \_\_\_\_\_\_0$; $(3)$已知$a$,$b$,$c$是非零有理数,则$\frac{a}{|a|}+\frac{b}{|b|}+\frac{c}{|c|}=

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九年级·英语·完成句子Unit 5 Sport

他每天游泳. He______.

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九年级·英语·书面表达Unit 5 Sport

上周你们学校举行了运动会.你们班取得了最好的成绩,因为你们班有最快的赛跑选手吴强,他在比赛中打破了学校纪录.你们班的跳高第一,跳远第二.三班成绩从第三名升到第二名,他们在400米赛跑这一项目上得了第一.二班成绩最差,但他们在跳远比赛这一项目上获得了冠军.请用英语记录这次运动会,包含上述信息.

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九年级下·英语·书面表达Unit 4 Natural disasters

暑假即将来临,某校学生会打算在假期举行为受灾地区(disaster area)的孩子们奉献爱心的活动,请你用英语写一份倡议书,号召同学们伸出援助之手,奉献自己的爱心。要求:1. 文中应该包括至少两种帮助方式及这样做的目的和意义。2. 80--100词,文章开头已给出,不计人总词数。Dear schoolmates: While you are sitting in our bright classroom, remember there

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九年级下·英语·书面表达Unit 4 Natural disasters

近几年来,人类活动对大自然的破坏引发了各种各样的自然灾害。作为一名中学生,请你根据以下内容,写一封倡议书,呼吁大家关注这些自然灾害,采取措施,拯救地球。要求:1)词数100左右;文章开头已给,不计词数;2)短文须包括表格中提示的所有要点,再适当发挥,增加细节,使短文连贯、通顺;3)短文中不得出现真实的人名、校名等相关信息。Natural disasters Harm to humansActions 1) not enough food

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九年级·英语·书面表达Unit 3 The environment

我国许多地区都处于严重缺水状态,如何保护好清洁水源?人们应该怎样节约用水?是我们面临的巨大挑战.根据下面的提示,写一篇70词左右的短文. 要求:1)语言表达正确; 2)包括以下要点; 3)可以适当发挥. 要点提示 参考词汇 益处:水的重要性;生活离不开水 important, can't live 存在的问题:浪费水严重;水污染严重 less water, don't care of,water pollution 建议:节约用水;保护

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九年级·英语·完成句子Unit 3 The environment

由于大雨我迟到了. I was late______ the heavy rain.

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九年级下·英语·书面表达Unit 2 Culture shock

假设你拥有三到四天的假期,你可以选择去你想去的任何一个地方,请以“My dream holiday”为题写一篇英语短文,描述你梦想的假期。要求: 1. 文中不得出现真实的人名和校名等相关信息。 2. 词数:80-100。标题和短文开头已给出,不计入总词数。 My dream holiday Everyone has a dream holiday. I hope I……

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九年级下·英语·书面表达Unit 2 Culture shock

假设你拥有三到四天的假期,你可以选择去你想去的任何一个地方,请以"My dream holiday"为题写一篇英语短文,描述你梦想的假期。要求:1. 文中不得出现真实的人名和校名等相关信息。2. 词数:80--100。标题和短文开头已给出,不计人总词数。My dream holiday Everyone has a dream holiday. I hope I ……

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九年级下·英语·书面表达Unit 1 Great explorations

请根据下列提示,以“When Isaac Newton was young”为题写一篇不少于80词的短文。内容提示:1. 艾萨克·牛顿于1642年出生在英国;2. 他出生时特别瘦弱,人们都没想到他会活下来;3. 当他还是小孩子的时候,他喜欢制作风筝或者其他简单的机器,但他的学习成绩 不好;4. 有一天,一个学习成绩好的同学踢了他一下。他决定比这个同学得更高的分数,结果他在很短的时间内就做到了。When Isaac Newton was

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九年级下·英语·阅读理解Unit 1 Great explorations

根据短文内容,选择正确答案。MARS--The Red Planet! "MARS--The Red Planet!" is one of our Early Reader Space books. It has surprising facts and photos explaining all about Mars. Aiming mainly at kids aged 7--10, it's an interesting way

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九年级·英语·书面表达Unit 2 Life in the future

Writing(作文) Write a passage of at least 60 words on the topic "Everybody Needs Friends"(以“每个人都需要朋友”为题写一篇不少于60个词的英语短文,标点符号不占格。) Use the following points as a guide. (短文须包含下列要点。) * Why does everybody need friends? * Have y

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九年级·英语·任务型阅读Unit 2 Life in the future

Answer the questions(根据短文内容回答下列问题) Everyone has good days and bad days. Sometimes, you may feel that you're on top of the world and all the questions on your maths test might seem easy. But sometimes you feel frightened

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九年级·英语·书面表达Unit 1 Saving the Earth

Writing(作文) Write a passage of at least 60 words on the topic "Something in My memory".(以“我记忆中的某件事”为题写一篇不少于60个词的英语短文,标点符号不占格。) Use the following points as a guide.(短文须包含下列要点。) * When and where it happened? * Why you want

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九年级·英语·任务型阅读Unit 1 Saving the Earth

Answer the questions(根据短文内容回答下列问题) Now it was Jerry's turn. And Jerry would ride Wild Lady! I watched Jerry in the cute. Jerry dropped down on the horse's back. He was ready to go. "Outside!" He called. The gate of the c

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九年级·英语·单词拼写/单词释义Unit 5 A story by MarkTwain

Remember how your parents always told you to eat broccoli when you were a kid?Maybe you didn't like it,but the green broccoli is r(1) ______ in vitamins and other nutrients that help protect against various kinds of canc

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九年级·英语·解答题Unit 5 A story by MarkTwain

Most people look forward to retirement as a time when they can finally take up activities that they never had the time or energy to pursue before.But some recent studies on people in their golden years are disturbing:the

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九年级·英语·解答题Unit 4 All about films and TV

One day a blind man and his guide dog both lost their lives in a traffic accident.On their way to Heaven,an Angel stopped them and said there was only one place left in Heaven so that one of them had to go to Hell.The ma

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九年级·英语·信息匹配Unit 4 All about films and TV

Complete each gap with an item from A ~ F below.There are two more than you need.(阅读短文,从A ~ F中选择正确的句子填空,有两项多余。) A.But for now,each of us has to be smart about these imperfect" life savers". B.you must know and account fo

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九年级·英语·书面表达Unit 3 Going places

Writing(作文) Write a passage of at least 60 words on the topic "The Most Exciting Moment"(以“最激动的时刻”为题写一篇不少于60个词的短文,标点符号不占格。) * Questions for reference.(以下问题仅供参考。) * What happened that day? * How did you feel? * Why was it

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九年级·英语·任务型阅读Unit 3 Going places

Answer the questions(根据短文内容回答下列问题) Mrs Burt was walking along a San Francisco street. Suddenly a man took her purse and ran. She was very angry. She had ten dollars, her bus pass, and the key to her house in her purse. M

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