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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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八年级·英语·单词拼写-单句Lesson 4 Animal Talk
We have been friends______ five years ago． （用 for、since 填空）
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八年级·英语·单词拼写-单句Lesson 4 Animal Talk
I have lived in China______ ten years． （用 for、since 填空）
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八年级·英语·阅读理解Lesson 4 Animal Talk
Can trees talk？ Yes， but not in words． Scientists have found that trees can communicate with each other． Not long ago， scientists found some surprising things． A willow tree（柳树） was attacked（被侵袭） by caterpillars（毛毛虫）． At
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八年级·英语·单词拼写-单句Lesson 4 Animal Talk
Mrs． Green always t______ me just like her daughter．
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八年级·英语·单词拼写/单词释义Lesson 4 Animal Talk
He answered the teacher's question c______
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八年级·英语·单词拼写-单句Lesson 4 Animal Talk
No one answered the phone． P______， he is not at home now．
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八年级·英语·单词拼写-单句Lesson 4 Animal Talk
We should take good care of o______ while our parents are away．
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七年级下·英语·阅读理解Unit 6 Electricity
阅读理解 Radios, telephones and televisions are widely used in the world. When you switch on the radio, you can listen. But when you use the telephone, not only can you listen to others, but also you can chat with them. Howe
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七年级下·英语·阅读理解Unit 6 Electricity
阅读理解 When you watch TV and play video games you make global warming(全球变暖) worse! To make electricity, fossil fuels(矿物燃料) are burned in big factories. But burning fossil fuels also makes greenhouse gases. This means that
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七年级下·英语·填空题Unit 6 Electricity
完形填空 How would you use a radio or a telephone if you had no electricity or batteries? This （1） bothered（使烦恼）British inventor Trevor Baylis. Then he made a wind-up（装有发条的）radio. It doesn't need （2） or batteries. You wind i
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七年级下·英语·填空题Unit 6 Electricity
根据短文理解, 从A、B、C三个选项中选择最佳答案填空。 Mrs. Black has have （1） of trouble with her skin, （2） she goes to see her doctor about it. The doctor can't find （3） wrong with her. But he gives her some tests. Mrs. Black calls the doctor t
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七年级下·英语·填空题Unit 6 Electricity
阅读下面短文，从短文后所给的A、B、C三个选项中选出能填人相应空白处的最佳选项。 A farmer, a cleaner and an electrical engineer ( 电气工程师 ) were waiting to be killed in the electric chair. The farmer was brought to the chair （1） "Do you have anything that you wa
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七年级下·英语·填空题Unit 6 Electricity
完形填空 We are lucky to live in a rich country where we have many things. However, most of us usually （1） some things. Electricity is one thing that we waste most. Lights, TVS, （2） and other things are often kept on even wh
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七年级下·英语·填空题Unit 6 Electricity
完形填空 Electricity is very useful in our daily lives. It is said to be one of the greatest （1） in human history. It lights our world, （2） our homes, cooks our food and gives us lots of happiness. Electricity brings brightn
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七年级下·英语·填空题Unit 6 Electricity
Before (leave) the classroom, please close the window.
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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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八年级·英语·填空题Lesson 8 A Picnic
______ the young man ever______（travel） to England？
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七年级·英语·填空题Unit 5 Water
Tom has to______ （finish） his homework first and the goes to play with others．
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七年级·英语·填空题Unit 5 Water
When I came into my room， I heard someone______ （sing） next to my room．
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