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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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九年级·英语·选择题Unit 1 If everyone starts to do something, the world will be saved.

—I can't repair my bike alone． —Well，let's ______ someone else ______us．

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九年级·英语·填空题Unit 1 If everyone starts to do something, the world will be saved.

阅读下面短文, 按照句子结构的语法性和上下文连贯的要求, 在空白处填入一个适当的词或使用括号中词语的正确形式填空。 There are many ways to save the environment if you would like. In this passage, you can find some _____(way). Plant more trees. Choose _____ right ground near you

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九年级·英语·阅读理解Unit 1 If everyone starts to do something, the world will be saved.

Pollution means adding dirty or harmful things to land, air, water and so on. As a result, they are no longer pleasant or safe to use. Pollution is bad for animals and plants, and it even makes people's health in danger.

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九年级·英语·填空题Unit 1 If everyone starts to do something, the world will be saved.

“When it comes to Earth, there's no time to waste, ” says the Earth Day Network. And that is right. Protecting our environment is very important, and World Earth Day was _______ in 1970 to raise people's environmental aw

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九年级·英语·填空题Unit 1 If everyone starts to do something, the world will be saved.

用括号中所给单词的适当形式填空【1】People in many countries are encouraged ___________(recycle)paper, plastic and water. 【2】People use this kind of machine __________ (make)corn noodles. 【3】I have many hobbies, such as__________ (collec

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九年级·英语·单词拼写Unit 1 If everyone starts to do something, the world will be saved.

根据句意及汉语提示完成单词【1】My father took me to his __________(工厂)by train yesterday. 【2】The river has been__________ (污染)by waste products. 【3】Farmers need much water to water their__________ (庄稼). 【4】Four people were__________ (

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九年级·英语·连词成句Unit 4 Amazing Science

五、看图说话【1】 grow, astronaut ________________________________________________________ 【2】 space, live, day ________________________________________________________ 【3】 robot, car, near _____________________________________

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九年级·英语·其他Unit 4 Amazing Science

四、情景交际。根据情景提示，完成下列各题。【1】老师问你，打篮球和听音乐你更喜欢哪个？你说是打篮球。你可以这么说 _________________________________________________________ 【2】你要跟你妈妈说这本书是以哈利波特(Harry Porter)命名的。你要这么说 _________________________________________________________ 【3】

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九年级·英语·阅读理解Unit 4 Amazing Science

In southern England there stands a circle of huge stones! Local people call it stonehenge. It’s said that it was built around 5000 years ago. Stonehenge has about 80 stones and each is about five meters tall. They were 3

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九年级·英语·填空题Unit 4 Amazing Science

How do you imagine the future? Will life in the future be better, worse or the same as now? ___ do you think of the future? People __ that life will probably be very different in 2050. First of all, larger planes __ , so

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九年级·英语·选择题Unit 4 Amazing Science

Teenagers______to smoke in public.

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九年级·英语·选择题Unit 4 Amazing Science

This kind of robot _____help people do dangerous work.

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九年级·英语·选择题Unit 4 Amazing Science

It ______3 years _____China launched Chang’e 1.

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九年级·英语·阅读理解Unit 3 English around the Word

Mrs Turner is a seventy-two-year-old woman.Her husband worked in a post office.One day they went to travel in another city,their bus hit to a rock and began to burn.He broke the window and helped his wife to get off,but

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九年级·英语·阅读理解Unit 3 English around the Word

Once there was a man who had two children,a boy and a girl.The boy was good- looking（看好） but the girl was not.One day they found a mirror（镜子） for the first time and they saw what they looked like.The boy was very pleased

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九年级·英语·选择题Unit 3 English around the Word

-Our school is beautiful! -It will be more beautiful if more trees and grass _____ by us.（）

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九年级·英语·选择题Unit 3 English around the Word

-Excuse me, Miss Smith, could you tell me how to improve my spoken English？ -OK． The best way is to practice ．（）

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九年级·英语·选择题Unit 3 English around the Word

In the past, the child laborers _____ do a lot of hard work.（）

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九年级·英语·选择题Unit 3 English around the Word

Zhang Lili is very brave and she "The most beautiful teacher"．（）