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#2 · 常错题

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; \

#4 · 常错题

#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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七年级·英语·选择题方位介词

请指出下列划线单词重音位置不同的一项. I live near the mountain, far away from the sea .( )

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八年级·英语·选择题介词短语

-- What a nice model plane! -- Thank you.I made it by_______.( )

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七年级·英语·选择题动词的固定搭配

These beautiful animals are in danger.We must them.( )

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七年级·英语·填空题助动词的过去式

Without her ______,I may not meet you again. (invite)

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八年级·英语·填空题助动词的过去式

She bought some apples for her son this morning. (改为一般疑问句) ______she ____________apples for her son this morning?

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七年级·英语·填空题助动词的过去式

I felt afraid last night.(对划线部分提问) ______

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九年级·英语·填空题助动词

much,harmful ______

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九年级·英语·选择题主语+不及物动词

"The workers are working on the farm now."The main structure of the seatence is .( )

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七年级·英语·填空题系动词

He ______my friend. ______your friend a boy or a girl?(am,is或are)

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七年级·英语·填空题情态动词

①Do you have a tidy desk or an untidy desk at home?Do you want to keep your desk clean and tidy for a long time?A tidy desk helps you find things easily (容易地) and do things well.It is also helpful for your study.Doing th

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八年级·英语·选择题情态动词

—Our school plans to have a sports meeting the day after tomorrow.Will it be sunny? —It fine.Who knows?The weather always changes quickly.( )

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八年级·英语·填空题情态动词

Hi,I\’m Margie,a writer from the US.Here,I team up with some readers of your age to help you with your problems.Students know best about students. Dear Margie, I try my best to study,but my grades are always not good.I\’

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八年级·英语·选择题实义动词的过去分词

—When did you the computer ?It looks nice. —Oh,I it three days ago.( )

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八年级·英语·选择题主语+及物动词+宾语+宾语补足语

I saw him crossing the street. The sentence structure is _______.

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七年级·英语·填空题史地常识类阅读

请读下面短文,判断句子的正误.正确的在括号内写"T",错误的写"F". English is different from any other languages.Because English words do not stay the same all the time.The language always changes itself.New words often come into use or old words are

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七年级·英语·选择题史地常识类阅读

You\’ll find the Great Barrier Reef in .( )

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八年级·英语·填空题史地常识类阅读

Victoria Falls is a great (1)______ (nature) wonder of the world.It is one of the(2)______ (large) waterfalls in the world.It is over 1,700 meters wide and about 108 meters (3)______ (height). The waterfall sits on the Z

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九年级·英语·填空题史地常识类阅读

The Lost Smile Characters: The Lord of Tears:A bad man who wants to master the world. Hilda:A good witch(女巫) who helps Ben and Sarah find the Lord of Tears. Ben and Sarah:Two children who want to find the The Lord of Tea

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八年级·英语·填空题史地常识类阅读

Great painters all have their own styles.As soon as we see their paintings,we know who the painter is.Brazilian(巴西的) artist Milton Omena thought about these styles.Then he designed logos(标识) for the world\’s most famous

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七年级·英语·填空题史地常识类阅读

It\’s time to say goodbye to this year\’s National Day holiday.How was your holiday?Did ou go on a trip? Student A,boy I love to explore(探索) new places.When traveling with my family,I usually help make travel plans befor

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