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(新)部编人教版四年级上册《 蝙蝠和雷达》说课稿

  • 2021年吉林省中考语文真题(答案版)

    2021年吉林省中考语文真题(答案版)

    出佛手园,远处有山,山中有岚,有云。岚清,云白,绸缎一般,棉花一般,曼妙而行,逍遥自在。除了爱,还有眼前这山川草木。小小人类身处自然,永不孤单。那些草木,那些动物,那些自然界中的生灵,各安其所,相处自洽。而人类,不免焦虑,屡屡焦虑,内在小宇宙紊乱,何不走到自然中,谦卑蹲下,去学习一株草、一颗露珠的宁静?

  • 2022年海南省中考英语真题(解析版)

    2022年海南省中考英语真题(解析版)

    In the late autumn, John was badly ill andbecame bedridden (长期卧床的).After the doctor visited John several times, he told Sue, “His condition isquite ___22___.John seems to have lost all will to live. If he doesn’t want to live, medicineswill not help him.”

  • 2022年海南省中考英语真题(原卷版)

    2022年海南省中考英语真题(原卷版)

    YangHongwei, 56, was born into a kite-making family in Weifang. When she was young,she often saw kites with bright colors and different shapes in hergrandfather’s workshop.

  • 2022年河南省中考英语真题(原卷版)

    2022年河南省中考英语真题(原卷版)

    In the large yard stood thirteen trees ofdifferent sizes. One day, while Joey was playing with his sister under thetrees, he noticed that a tree trunk (树干) had a sad look. He raninto the house to tell his mom about it. She told Joey to find the reason whyit was sad.

  • 2022年河北省中考英语真题(原卷版)

    2022年河北省中考英语真题(原卷版)

    As a boy, Kevin visited national parks and helearned the Earth is in ___12___ condition. He felt worried, and hewanted to ___13___ the Earth. In 2009, he went to swim in water nearNorth Pole(北极)todraw people’s attention to the melting glaciers(融化的冰川).

  • 2022年江西省中考英语真题(原卷版)

    2022年江西省中考英语真题(原卷版)

    Long ago, a poor old couple lived on the coast.One day, an old storyteller came to their village. The old couple gave him ameal. In return, he gave them a coffee mill (磨粉机)and said, “Say, ‘Mill, please grind (磨粉)’,”

  • 2022年河南省中考英语真题(解析版)

    2022年河南省中考英语真题(解析版)

    In the large yard stood thirteen trees ofdifferent sizes. One day, while Joey was playing with his sister under thetrees, he noticed that a tree trunk (树干) had a sad look. He raninto the house to tell his mom about it. She told Joey to find the reason whyit was sad.

  • 2022年河北省中考英语真题(解析版)

    2022年河北省中考英语真题(解析版)

    As a boy, Kevin visited national parks and helearned the Earth is in ___12___condition. He felt worried, and he wanted to ___13___ the Earth. In 2009, he went to swim in waternear North Pole(北极)todraw people’s attention to the melting glaciers(融化的冰川).

  • 2022年江西省中考英语真题(解析版)

    2022年江西省中考英语真题(解析版)

    The app — called Sit With Us — is ___15___. If a student is having lunch in the afternoon,he or she can create an invitation. Other students can open the app and ___16___ that invitation. They can then use the app todecide when and where to ___17___.

  • 2022年福建省中考英语真题(原卷版)

    2022年福建省中考英语真题(原卷版)

    Thinking that her dream could never come true,Kelly was in low spirits and ____18____ her studies at school. Hermother did all she could to cheer her up, ____19____ Kelly refused tochange. She even took out all her anger and ____20____ on her mother.

  • 2022年福建省中考英语真题(解析版)

    2022年福建省中考英语真题(解析版)

    At the age of nine, Kelly dreamed of being abasketball player. But one day when she was playing basketball, she hurt herleft leg ____16____.

  • 2022年安徽省中考英语真题(解析版)

    2022年安徽省中考英语真题(解析版)

    Antarctica lies in the most southern part of theworld. It is the coldest area on Earth. There isn’t much rain, but there is alot of snow and wind. The lowest temperature was on 21 July in 1983 at -89.2℃!

  • 2022年安徽省中考英语真题(原卷版)

    2022年安徽省中考英语真题(原卷版)

    During 1907-1909, British explorer EarnestShackleton explored Antarctica on foot. In 1911, two explorers—a British mannamed Scott and a Norwegian named Amundsen—raced 1, 400 kilometres to the SouthPole (南极).Amundsen arrived first.

  • 2022年吉林省中考英语真题(原卷版)

    2022年吉林省中考英语真题(原卷版)

    Taiping nijiaojiao is made of the mudfrom the local mountain. It takes more than ten steps to make the clay toy, andthe key step is to knead (捏) it with your hands. You can knead the clay toyinto anything, like animals and plants. The blowhole is the most difficult partto make, for the size of the blowhole makes a difference to the sound. Whilecoloring, you can use traditional cultural elements (元素) thatcarry good meanings. It’s hard to make taipingnijiaojiao. But when you finally make it, you will feel proud of yourself.

  • 2022年吉林省中考英语真题(解析版)

    2022年吉林省中考英语真题(解析版)

    “Red Trip” in TonghuaTonghua is a good choice to have a “red trip”. It is aplace full of “red stories”. The well-known national hero Yang Jingyu oncefought here. Experience the “red spirit”!

  • 2022年北京市中考英语真题(解析版)

    2022年北京市中考英语真题(解析版)

    I joineda band (乐队)as a drummer in my middle school. I thought itwould be fun playing the drum and meeting new friends. At first it was easy,but a month later, it got difficult. I was the only one who couldn’t keep pace (节奏)with the other players. Our teacher,Angie, singled me out to keep practicing while everyone else got to relax. Ifelt ashamed (羞愧的)as my teammates watched me fail so many times.Finally I got so tired of practicing that I didn’t care about doing it right.

  • 2022年北京市中考英语真题(原卷版)

    2022年北京市中考英语真题(原卷版)

    When itcomes to a meaningful life, we might think of love, happiness and health. Alife filled with meaning is what most of us want for ourselves. Then, whatmakes a meaningful life?Manyresearchers agree that a meaningful life comes down to three factors (因素): havinglong-term goals, believing that one’s life matters, and feeling that one’s lifefits together and “makes sense”.But we believe there is more to consider. Sometimeslife enables us to experience small moments of beauty. When people are open toappreciating (欣赏) suchexperiences, these moments may improve how they see their own life. We callthis experiential appreciation (EA).

  • 北师大初中九年级数学下册二次函数与一元二次方程2教案

    北师大初中九年级数学下册二次函数与一元二次方程2教案

    教学目标:1.知道二次函数与一元二次方程的联系,提高综合解决问题的能力.2.会求抛物线与坐标轴交点坐标,会结合函数图象求方程的根.教学重点:二次函数与一元二次方程的联系.预设难点:用二次函数与一元二次方程的关系综合解题.☆ 预习导航 ☆一、链接:1.画一次函数y=2x-3的图象并回答下列问题(1)求直线y=2x-3与x轴的交点坐标; (2)解方程2x-3=0(3)说出直线y=2x-3与x轴交点的横坐标和方程根的关系2.不解方程3x2-2x+4=0,此方程有 个根。二、导读画二次函数y= x2-5x+4的图象1.观察图象,抛物线与x轴的交点坐标是什么?2.求一元二次方程x2-5x+4=0的解。3.抛物线与x轴交点的横坐标与一元二次方程x2-5x+4=0的解有什么关系?(3)一元二次方程ax2+bx+c=0是二次函数y=ax2+bx+c当函数值y=0时的特殊情况.二次函数y=ax2+bx+c的图象与x轴交点的横坐标与一元二次方程ax2+bx+c=0的根有什么关系?

  • 北师大初中七年级数学下册角平分线的性质教案

    北师大初中七年级数学下册角平分线的性质教案

    解析:根据AB∥CD,∠ACD=120°,得出∠CAB=60°.再根据尺规作图得出AM是∠CAB的平分线,即可得出∠MAB的度数.解:∵AB∥CD,∴∠ACD+∠CAB=180°.又∵∠ACD=120°,∴∠CAB=60°.由尺规作图知AM是∠CAB的平分线,∴∠MAB=12∠CAB=30°.方法总结:通过本题要掌握角平分线的作图步骤,根据作图明确AM是∠BAC的角平分线是解题的关键.三、板书设计1.角平分线的性质:角平分线上的点到这个角的两边的距离相等.2.角平分线的作法本节课由于采用了动手操作以及讨论交流等教学方法,从而有效地增强了学生对角以及角平分线的性质的感性认识,提高了学生对新知识的理解与感悟,因而本节课的教学效果较好,学生对所学的新知识掌握较好,达到了教学的目的.不足之处是少数学生在性质的运用上还存在问题,需要在今后的教学与作业中进一步的加强巩固和训练

  • 北师大初中七年级数学下册单项式除以单项式教案

    北师大初中七年级数学下册单项式除以单项式教案

    光的速度约为3×108米/秒,一颗人造地球卫星的速度是8×103米/秒,则光的速度是这颗人造地球卫星速度的多少倍?解析:要求光速是人造地球卫星的速度的倍数,用光速除以人造地球卫星的速度,可转化为单项式相除问题.解:(3×108)÷(8×103)=(3÷8)·(108÷103)=3.75×104.答:光速是这颗人造地球卫星速度的3.75×104倍.方法总结:解整式除法的实际应用题时,应分清何为除式,何为被除式,然后应当单项式除以单项式法则计算.三、板书设计1.单项式除以单项式的运算法则:单项式相除,把系数、同底数幂分别相除,作为商的因式;对于只在被除式里含有的字母,则连同它的指数作为商的一个因式.2.单项式除以单项式的应用在教学过程中,通过生活中的情景导入,引导学生根据单项式乘以单项式的乘法运算推导出其逆运算的规律,在探究的过程中经历数学概念的生成过程,从而加深印象

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