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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·填空题Unit 4 Seasons

There are four seasons in a year:spring,summer,autumn and winter.Each season lasts three (1) . Spring is the first season of the year.In northern part of the Earth,the spring months are March,April and May.In spring,the

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七年级·英语·填空题Unit 4 Seasons

What's my favorite stamp?That's easy --- (1) stamp the Nicaraguans made in 1900.It had a picture (2) Mount Momotombo on it.The artist (艺术家) wanted the stamp to look interesting,so he (3) (paint) the mountain with lots of

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七年级·英语·选择题Unit 4 Seasons

The police in our city always do their best to _________ people,so people in our city are very safe.( )

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七年级·英语·选择题Unit 4 Seasons

There is a _________ map on the wall and you can see where my hometown is clearly.( )

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七年级·英语·选择题Unit 4 Seasons

We're going to have an English _________ tomorrow.I think I'll get a high score.( )

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七年级上·英语·翻译Unit 3 The Earth

根据所给汉语完成句子,每空一词(1)帮助他人是很重要的。 help others.(2)不要忘记把你的垃圾丢掉。Don't forget to your rubbish.(3)我把杂志放入抽屉里。 I the magazine the drawer.(4)你们上个星期天在公园玩得高兴吗?Did you in the park last Sunday?(5)我们通常7点起床。We usually at 7 o'clock.(6)在我们的城

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七年级上·英语·阅读理解Unit 3 The Earth

根据短文内容,选择正确答案。 Peter was a small boy. He lived with his parents in a small house near some hills. The people there were all poor. One night it was very dry and windy. When everybody was asleep, Peter suddenly heard some

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七年级上·英语·阅读理解Unit 3 The Earth

根据短文内容,选择正确答案。D The students are having their chemistry (化学) class. Miss Liu is telling the children what water is like. After that, she asks her students, “What's water?”No one speaks for a few minutes. Miss Liu asks ag

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七年级上·英语·阅读理解Unit 3 The Earth

阅读短文,下列问题 A Imagine the situation. You are driving alone in a desert or on a mountain. You have no idea where you are. You passed the last house two hours ago. Then your car breaks down. It is night and it is cold. You h

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七年级上·英语·阅读理解Unit 3 The Earth

根据表格内容,选择正确答案。 cooks Editors(编辑) Drivers English teachers People we need Be good at cooking; work at late night Be good at English; enjoy writing stories; know a lot about the world Be good at Driving; smart; careful Lov

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七年级上·英语·阅读理解Unit 3 The Earth

阅读短文,从每题所给的A、B、C和D四个选项中,选出最佳选项。 In most parts of the world, many students help their schools make less pollution. They join "environment clubs". In an environment club, people work together to make our environment clean.

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七年级上·英语·阅读理解Unit 3 The Earth

根据短文内容,选择正确答案。 In most parts of the world, many students help their schools make less pollution. They join “environment clubs”. In an environment club, people work together to make our environment clean. Here are some th

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七年级上·英语·阅读理解Unit 3 The Earth

阅读理解 Air pollution is one of the most serious problems for people nowadays. But some people in the US say that they have found a way to solve the problem. In manycities, hundreds of people ride bikes instead of (代替) taki

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七年级上·英语·阅读理解Unit 2 Daily Life

阅读理解Next Tuesday is my mother's birthday. I love her and I'd like to give her a nice gift. What should I buy? I hear shopping online is easy and quick And we can buy anything we want through it. But I'm not sure whether

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七年级上·英语·阅读理解Unit 2 Daily Life

根据短文内容,选择正确答案。A My family lives in London. In the morning, my father goes to work and we go to school. My father takes us to school every day. My mother stays at home. She does the housework. She always has lunch at home

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七年级上·英语·阅读理解Unit 2 Daily Life

阅读理解 Don't be too surprised if you see a car going down the road without a driver in Beijing these days. It might be one of Baidu's self-driving cars. Last month, Baidu was granted (授予) a license to test its self-driving

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七年级上·英语·阅读理解Unit 2 Daily Life

阅读理解 Hello, everyone. My name is Alice. I usually go to school by bus, but the day before Christmas, I ride a bike to school. On my way, I find a box lying on the road. I stop my bike and pick up the box. I open it and s

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七年级上·英语·填空题Unit 2 Daily Life

完形填空 Hello! (1) name is Li Ying. I'm twelve. I'm from Kunming. Now I'm in Beijing No.14 High School. I'm (2) Class Five, Grade Seven. Miss Gao (3) my English teacher. She is (4) old teacher. I have a pen, a ruler and two

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七年级上·英语·填空题Unit 2 Daily Life

完形填空Dear Bob, Today is my first day in this school. I want to (1) you something about my new school. My school is not (2) but very beautiful. There are three tall buildings in it. In the middle of (3) school. There is a

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七年级上·英语·填空题Unit 2 Daily Life

根据短文理解,从A、B、C、D四个选项中选择最佳答案填空。 My uncle works in a shop. It's near an English (1) . Every day the students come to (2) things. In the (3) , my uncle gets up at six o'clock and after breakfast he (4) his bike to the shop.

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