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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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阅读理解 We are all busy talking about and using the Internet, but how many of us know the history of the Internet? Many people are surprised when they find that the Internet was set up in the 1960s. At that time, computers
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根据短文内容,选择正确答案。 Terrafugia Company has said that its flying car, named Transition, has successfully finished a 37- second test flight. On March 5th, 2009, at Plattsburgh International Airport in New York. The company's ch
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根据短文内容,选择正确答案。 The computers changed our lives in the 1980s, the Internet changed our lives in the 1990s, and the robots will change our lives in the new century. Do you think there will be robots in people's homes? It's
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阅读理解 The world's first "flying car" will soon appear in the market--It will be yours for just $127, 000.The Terrafugia Transition is a light sport plane with four wheels and foldable (可折叠的) wings. It can fly up through t
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完形填空 In some science fiction movies,the robots are just like humans. They help with the housework and do the most (1) jobs. Some scientists believe that there will be such robots in the future. (2) , they agree it may (3
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完形填空 Nick is a 14— year— old schoolboy. His life is full of exams and studies on weekdays. He has (1) free time. He thinks playing computer games (2) the best way to make him relax. When he has free time, he sits in fron
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完形填空 What do you think of your Chinese? Is it good or bad? If you think you are good at Chinese, you can (1) the competition named Dictation Assembly of Chinese Characters(《汉字听写大会》). The competition became popular (2) te
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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入相应空白处的最佳选项。 Nowadays, Wechat is becoming more and more (1) in China. No matter where we are, we can send text or voice messages to our friends. We can also find a stranger to talk to by shaki
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Harry Peter taught science at a high school. Once he went to a bookshop and bought some books. All of them were expensive ones. He left them in his car in a quiet street. Then he went to buy some fruits in the market. At
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People say the lion is the “King of Animals” because we are very strong. So people watch us live in zoos behind bars or in parks when they drive in cars. But we are not happy there. We should live in grassy land in Afric
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It is the fifth day. Robinson Crusoe is all alone on a small island. He feels hopeless. He is tired and hungry. Now he can catch fish for food but he doesn’t have a fishing rod ling enough. He sleeps in a cave but he als
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You can probably all ride a bike well. I’m an exception (例外). I started riding a bike when I was three. It was a tiny toy bike with four wheels. I loved it very much and rode it every day. When I was 5, my cousin gave me
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A good memory is a great help in learning a language. Everybody _______ his own language by remembering what he _______when he is a small child. Some boys and girls who live _______with their parents seem to learn two la
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During the Tang Dynasty more than 1,000 years ago, people had to send gifts to the emperor(皇帝). Once, a man called Mian ____ to take some swans(鹅) in cages to the emperor.____ he was passing a lake, he found that the swa
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You _________ stand in the cold or you will feel frozen.
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We should try our best to keep our classroom ________ every day.
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I happened _____my former English teacher last Saturday.( )
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