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不限语文数学英语物理化学生物历史地理道法

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不限七年级八年级九年级

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#1 · 常错题

#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·选择题日常生活类阅读

Daniel\’s school is the east of the town and the south of the hospital．（）

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七年级·英语·选择题人称代词;物主代词

If bicycle is broken, can use ．（）

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七年级·英语·选择题物主代词;形容词词义辨析

I hope you ________ a car ________.（）

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七年级·英语·选择题数词

-Bob,can you read the number 307,018? -Yes,I can．It's ．（）

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七年级·英语·选择题冠词

Don't it in Chinese．Please English．（）

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七年级·英语·选择题介词+分词短语;介词和介词短语

She will go there underground and I will go there a bus．（）

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七年级·英语·选择题副词;情态动词

she isn't at home．She go to Beijing．（）

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七年级·英语·选择题不定冠词（a，an）

-Do you know man in black? -Which one? one outside the classroom?He's new teacher．（）

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九年级·英语·阅读理解直接理解,标题判断,科普知识与现代技术,逻辑推理,事物说明、介绍,指代猜测

Facial recognition technology（人脸识别技术）is widely used today. For example, the police use it to search for bad guys. It's also used to unlock phones or doors. Now, a similar technology, known as facial detection（探测）, is ent

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九年级·英语·阅读理解标题判断,短语猜测,个人故事,日常生活,逻辑推理,句意猜测

When the sun rose and the blue sky came up, my father and I used to climb the mountain near my house. Walking together, my father and I used to have a lot of conversations through which I learned lessons from his experie

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九年级·英语·阅读理解篇章结构,直接理解,科普知识与现代技术,段落大意,文章大意,语意转化,事物说明、介绍

①Chemistry is everywhere in our daily life. Sometimes it's easy to see. At other times, it can be very hard to see the everyday chemistry at work, but nearly everything you touch has some chemicals（化学物质） in it. ②Chemistr

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九年级·英语·阅读理解直接理解,标题判断,历史与社会,逻辑推理,歌曲与诗歌,目的意图

The title: By the Youth When we were scared, sad and helpless, you gave us courage, warmth and hopes. When we had to stay at home to keep away from the illness, you, workers, helped us buy living things； Leaving your chi

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九年级·英语·填空题名词辨析,代词辨析,固定短语,动词辨析,个人故事,个人情况,副词辨析,形容词词义辨析,介词辨析,并列连词辨析

Run for Class President Two months ago, when our class election (选举） started, I decided to run for class president. I enjoyed speaking in public and got along well with people, so I felt it easy to win. But I was (1) tha

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九年级·英语·选择题宾语从句的语序,连接副词where引导宾语从句

—Jerry, could you remember ? —Have you forgotten we agreed to go to the Summer Palace?

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九年级·英语·选择题形容词词义辨析

一I don't want to remember English words anymore because I often forget them. 一It's to forget English words. Keep reviewing them and you'll succeed.

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九年级·英语·选择题时态辨析,一般过去时表示过去发生的动作或存在的状态,动词过去式的规则变化

—Have you ever been to Shanghai? —Of course. Actually, I there for six years, but now I live in Beijing.

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九年级·英语·选择题the+副词比较级...，the+比较级

一You have made great progress on your study. 一Thank you. I believe you work, the better grades you will get.