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北师大初中七年级数学上册代数式教案2

  • 湖北省荆州市2019年中考语文真题试题

    湖北省荆州市2019年中考语文真题试题

    那位教师立刻用这束树枝朝她颈背上狠狠抽打了十几下。彭斯的眼里没有涌出一滴眼泪。我目睹着这一场面,不由得升起了一股徒劳无益的怒火,气得双手直发抖,只得停下手中的活儿,可是她那张若有所思的脸上,却神色如常,没有一点变化。“倔脾气的姑娘!”斯凯契德小姐嚷道,“你那邋遢习惯怎么也改不了啦。把扫帚拿走!”彭斯遵命照办了。当她从藏书室里出来时,我仔细朝她打量着。她正把自己的手绢放回口袋,瘦削的脸颊上还有一丝泪痕在闪闪发光。

  • 湖北省宜昌市2019年中考语文真题试题(含解析)

    湖北省宜昌市2019年中考语文真题试题(含解析)

    写字画线最根本的一条是力量基本要匀,不能忽轻忽重。古人名之曰“平”,这是笔法的基本規律,“如锥画沙”就是对“平”字最好的形容,只有明白了“平”的道理,然后才能在“平”的基础上求变化,这就是笔法中的提、顿、轻、重,疾,徐等变化,用笔的变化是无穷的,但无论怎么变化都要力量基本平均。所用力量不能悬殊太大,黄宾虹说幼时学书法,开头写“大”字只有五个“点”,就是起落笔太重、行笔太轻,力量悬殊,形成线条的空虚。书家把这叫做“系马桩”。

  • 湖北省咸宁市2019年中考语文真题试题(含解析)

    湖北省咸宁市2019年中考语文真题试题(含解析)

    微塑料在海洋中的扩散性更强。荷兰科学家曾研究过太平洋塑料垃圾带,发现塑社虽然只占到塑料总质量的8%,但是却占到浮在此区域塑料面积的94%。微塑料在海洋中无处不在,且具有很大的隐藏性。2017年,我国“蛟龙号”载人潜水器从大洋深处4500米处带回的海洋生物,在其体内竟也检出微塑料的成分。微塑料更容易进入食物链,对海洋生态系统造成严重的影响。美国有关人士曾指出,丢弃在水中的塑料拉圾已危害到逾600种海洋生物,造成鲸鱼、海龟、海豚、鱼和海鸟等受伤或死亡。

  • 湖北省咸宁市2019年中考语文真题试题

    湖北省咸宁市2019年中考语文真题试题

    那么,微塑料来自何处呢?海洋微塑料既有海源方面的输入,也有陆源方面的输入而陆源方面的输入是海洋中塑料污染的主要来源,主要是人类在生产和生活中丢弃的塑料废弃物等。除了望料拉圾外,人类常用的洗涤剂、护肤品及工业原料等也含有大量微塑料成分,这些微塑料成分随污水排出,往往会随着陆源垃圾输入到海洋当中。

  • 湖北省十堰市2019年中考语文真题试题

    湖北省十堰市2019年中考语文真题试题

    这套说法你一定经常听说,它被不少人奉为养生经典。然而,就在2018年11月2日,这套理论终于被“官宣”为伪科学,美国圣地亚哥法庭判罗伯特.欧阳赔偿一名癌症患者1.05亿美元,这位罗伯特就是大名鼎鼎的酸碱体质理论创始人,他将红肉、糖、蛋、奶制品、酒精、咖啡等归类为酸性食物将蔬菜、水果,谷物、鱼类等归类为碱性食物。他不仅写了四本书来推广这套理论,还大胆地以这套理论为依据治疗癌症患者,癌症患者按照他的要求,放弃化疗,采用他独创的碱性疗法治疗,吃碱性食物,注射高达500美元一针的小苏打针剂,最终导致癌症患者病情恶化到四期。

  • 2022年湖北省鄂州市中考英语真题(原卷版)

    2022年湖北省鄂州市中考英语真题(原卷版)

    Dealing with a nosebleed(鼻出血)mightseem simple. But recently, the British RED Cross asked parents with youngchildren how to help a child with a nosebleed. About 65 percent of parents didnot ____11____ the correct action to help.

  • 2022年湖北省荆州市中考英语真题(解析版)

    2022年湖北省荆州市中考英语真题(解析版)

    One night many yearsago, an angry voice woke me up from sleep. It was my drunken (喝醉的) father. Those days, he would always ___11___ home very late. Sometimes, he would also go on to fight with my mom.

  • 2022年湖北省鄂州市中考英语真题(解析版)

    2022年湖北省鄂州市中考英语真题(解析版)

    Dealing with a nosebleed(鼻出血)mightseem simple. But recently, the British RED Cross asked parents with youngchildren how to help a child with a nosebleed. About 65 percent of parents didnot ____11____the correct action to help.

  • 2022年湖北省荆州市中考英语真题(原卷版)

    2022年湖北省荆州市中考英语真题(原卷版)

    My earliest memory ofthese events began when I was around four years old. I was filled with ___12___ at that time. There were lots of ___13___ — crying, shouting, and doors slamming (砰地关上).

  • 2022年湖北省武汉市中考英语真题(解析版)

    2022年湖北省武汉市中考英语真题(解析版)

    The December day started like any other. Papacame back with his boat full of fish. Mama made breakfast for the family.Seven-year-old Joonas was doing his homework, while his two little brothers ranaround the yard. That day seemed peaceful, but Alejo ____16____ better.

  • 2022年湖北省恩施州中考英语真题(解析版)

    2022年湖北省恩施州中考英语真题(解析版)

    Once, herfather took her to the kitchen. He asked Jane to take a potato, an egg ____11____ two spoons of tea leaves. Jane was ____12____, andasked her father, “Do you want me to cook?”

  • 2022年湖北省宜昌市中考英语试题(解析版)

    2022年湖北省宜昌市中考英语试题(解析版)

    Duringwork hours in Becker’s bread shop, the kitchen is especially quiet except thesound of the machine. The quiet environment is not the result of the strictrules, but because all the workers are deaf. They use sign language tocommunicate with each other from time to time.

  • 2022年湖北省宜昌市中考英语试题(原卷版)

    2022年湖北省宜昌市中考英语试题(原卷版)

    Why do you need hobbies? A study has found thatpeople are more positive (积极的) when they take part in a relaxing activity. ___36___Scientists also think they might be good for your brain.

  • 2022年湖北省十堰市中考英语真题(解析版)

    2022年湖北省十堰市中考英语真题(解析版)

    My arms were shaking and my heart was beating ____19____ when I stood at thestarting line. ____20____the endless runway (跑道), I felt like a boat fighting against the windand rain. I ____21____myself that simply joining in was a victory (胜利) itself.

  • 2022年湖北省十堰市中考英语真题(原卷版)

    2022年湖北省十堰市中考英语真题(原卷版)

    My arms were shaking and my heart was beating ____19____when I stood at the starting line. ____20____ the endless runway (跑道), I felt like a boatfighting against the wind and rain.

  • 2022年湖北省武汉市中考英语真题(原卷版)

    2022年湖北省武汉市中考英语真题(原卷版)

    The December day started like any other. Papacame back with his boat full of fish. Mama made breakfast for the family.Seven-year-old Joonas was doing his homework, while his two little brothers ranaround the yard.

  • 2022年湖北省恩施州中考英语真题(原卷版)

    2022年湖北省恩施州中考英语真题(原卷版)

    Once, herfather took her to the kitchen. He asked Jane to take a potato, an egg ____11____two spoons of tea leaves. Jane was ____12____, and asked her father, “Doyou want me to cook?”

  • 2022年广西北部湾经济区中考英语真题(解析版)

    2022年广西北部湾经济区中考英语真题(解析版)

    Ibelieved that I was right and he was wrong, and Tony believed that I was wrongand he was right. Our teacher, a kind and smart lady, decided to teach us alesson. She brought us to the front of the class and placed him on one side ofher desk and me on the other. In the middle of her desk was a large and roundobject. I could clearly see that it was black. The teacher asked us what colorthe object was. “White,” Tony answered. I couldn’t believe he said the objectwas white! “Clearly, it was black!” Another argument started between Tony andme, this time about the color of the object.

  • 2022年广西北部湾经济区中考英语真题(解析版)

    2022年广西北部湾经济区中考英语真题(解析版)

    Ibelieved that I was right and he was wrong, and Tony believed that I was wrongand he was right. Our teacher, a kind and smart lady, decided to teach us alesson. She brought us to the front of the class and placed him on one side ofher desk and me on the other. In the middle of her desk was a large and roundobject. I could clearly see that it was black. The teacher asked us what colorthe object was. “White,” Tony answered. I couldn’t believe he said the objectwas white! “Clearly, it was black!” Another argument started between Tony andme, this time about the color of the object.

  • 2022年广西北部湾经济区中考英语真题(原卷版)

    2022年广西北部湾经济区中考英语真题(原卷版)

    Ibelieved that I was right and he was wrong, and Tony believed that I was wrongand he was right. Our teacher, a kind and smart lady, decided to teach us alesson. She brought us to the front of the class and placed him on one side ofher desk and me on the other. In the middle of her desk was a large and roundobject. I could clearly see that it was black. The teacher asked us what colorthe object was. “White,” Tony answered. I couldn’t believe he said the object waswhite! “Clearly, it was black!” Another argument started between Tony and me,this time about the color of the object.

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