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人教版高中数学选择性必修二等差数列的前n项和公式(2)教学设计

  • 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.

  • 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)

    By usingthis method, the study found that red meats were the most unfriendly foods tothe environment. Keeping farm animals produces a large number of methane(甲烷)that keeps 30 times more heat than CO2. As well asmaking the earth warmer, eating too much red meat is known to increase the riskof a few illnesses, such as heart trouble.

  • 2022年广东省广州市中考英语真题(解析版)

    2022年广东省广州市中考英语真题(解析版)

    When youand your friends turn to each other to talk about problems or troubles, yougive each other advice and help. One important thing of our growth is to makedecisions to help our friends and learn to support each other. This requires usto learn what it means to help friends and how to help them in right ways.

  • 2022年山东省滨州市中考英语真题(解析版)

    2022年山东省滨州市中考英语真题(解析版)

    Everyone knows how similar chimpanzees (黑猩猩)are to humans. So it’s no surprise that their greetings are also close to ours.The most common ways of greeting between chimpanzees are hand touching andhugging. Sometimes they also kiss each other. Some chimpanzees can even learnsimple sign language.

  • 2022年山东省济宁市中考英语真题(解析版)

    2022年山东省济宁市中考英语真题(解析版)

    Raden Roro Hendarti, nearly 50 years old, is alibrarian in Muntang village. She started a “trash library”, hoping to makechildren read more as well as make them realize the importance of environmentprotection. Each weekday, Raden puts all kinds of books on the back of herthree-wheeler (三轮车)and rides to Muntang village. There, children line up to exchange plastic cups,bags and other trash for books from Raden’s mobile library. After finishing theexchange, Raden carries back all the trash.

  • 2022年山东省济宁市中考英语真题(原卷版)

    2022年山东省济宁市中考英语真题(原卷版)

    Each ofthem has their own experience- two people with synesthesia may both “feel”music, but they almost never feel the music in the same way. For example, onemay feel the music of the violin lightly brushing his face; the other may feelit on her ankle (脚踝). And one’s experience of synesthesia is alwaysthe same. If they see the number 5 in the color blue, then 5 is blue every timethey see it.

  • 2022年广东省广州市中考英语真题(原卷版)

    2022年广东省广州市中考英语真题(原卷版)

    Slowlybut surely, Amy and her grandparents were making progress. Boxes of all sizeswere placed on top of each other throughout the house. Amy’s grandparents hadlived in the house for years and they had collected many things.

  • 2022年山东省滨州市中考英语真题(原卷版)

    2022年山东省滨州市中考英语真题(原卷版)

    As thegovernment encourages the renaissance (复兴) of traditional culture,Hanfu is getting more and more popular with the teenagers. Every year, we canenjoy different Hanfu shows around the cities. And now quite a few Hanfu clubshave been set up in universities. Members usually wear Hanfu at theirgraduation ceremonies or during holidays. Some even wear Hanfu on regular days,too. And these fans created a special day—China Haniu Day to celebratetraditional Chinese clothing. It falls on the third day of the third month inChinese lunar calendar (阴历).

  • 2022年内蒙古赤峰市中考英语真题(原卷版)

    2022年内蒙古赤峰市中考英语真题(原卷版)

    We allknow that rice, wheat and corn are staples, but do you know there is anotherkind of staple food—potatoes? Potatoes have many advantages. Theyare a good source of vitamin C and potassium(钾). A potato’s vitamin C isas rich as 10 apples. What’s more,potatoes are low in calories(卡路里)-onlythree fourths of the same amount of wheat and corn, according to People’s Daily. Potatoes are easy togrow. It can be grown in both the north and the south during winter, spring andautumn. The plant is also able to bear drought(干旱). Some areas of China arefacing water shortages, so the potato is safe to grow.

  • 2022年内蒙古赤峰市中考英语真题(解析版)

    2022年内蒙古赤峰市中考英语真题(解析版)

    Chopsticksoriginated from(起源于) China.Though simple and little, they are agreat invention in the history of humans. There are many legends aboutChopsticks, Da Yu and Chopsticks is one of them.It issaid that during Yao and Shun times, Shun ordered Yu to control the flood. Oneday, Yu took a boat to an island, he was so hungry that he used an earth pot tocook meat. After the meat was well-done in boiled water, he didn’t want towaste time to wait for it to cool, so he took two branches to pick up the meatfrom the soup. After, to save time, he always took small branches to take outfood from the hot pot. For a long time, he was skilled at picking up food withsmall sticks. In this way, the first types of chopsticks were born.

  • 2022年内蒙古包头市中考英语真题(解析版)

    2022年内蒙古包头市中考英语真题(解析版)

    Mostschools offer different kinds of subjects and activities for students, but someschools offer additional training in certain areas, such as the performing andarts. In this way, schools can help students develop their artistic talentsfrom an early age and have greater success in their future profession. THE ROYAL BALLET(芭蕾舞)SCHOOL

  • 2022年内蒙古包头市中考英语真题(原卷版)

    2022年内蒙古包头市中考英语真题(原卷版)

    Locatedin the mountains about 100 miles from Los Angeles, the Idyllwild Arts Academyis a boarding school for young artists. It offers training in arts, likedrawing, painting, photography and cinema, along with programmes for theperforming arts. The school’s quiet, rural location also makes it a verypeaceful and beautiful place to learn. THE NATIONAL CIRCUS(杂技)SCHOOL

  • 内蒙古赤峰市2019年中考历史试题(解析版)

    内蒙古赤峰市2019年中考历史试题(解析版)

    (1)材料一中,谁曾经走过古丝绸之路?材料二 海上丝绸之路把丝绸远销海外,还把中国古代的发明创造,如(四大发明) 、 、 、印刷术、瓷器、医学、中草药等传布到世界各地。——陈炎《海上丝绸之路与中外文化交流》(2)请将材料二中三处画“_______” 的部分在答题卡上补充完整。材料三 明朝中期,随着日本国内社会动荡加剧,特别是由于明朝国力减弱,海防松懈,倭寇与中国海盗奸商等相互勾结,对中国沿海的武装抢劫日益猖獗。……沿海各地遭到重大破坏,时称“倭患”。——中国历史七年级下册 (3)根据材料三和所学知识,分析明朝中期出现“倭患”的原因是什么?倭寇猖獗之时,谁临危受命南下抗倭?(4)1684年,为了加强对东南地区的管辖,清政府在台湾设置了什么机构?

  • 内蒙古赤峰市2019年中考历史试题(原卷版)

    内蒙古赤峰市2019年中考历史试题(原卷版)

    19.中国古代一直实行和平开放的对外政策。但是,从明朝中期开始,对外环境发生了变化。阅读下列材料回答问题。材料一 (见下图两个人物) (1)材料一中,谁曾经走过古丝绸之路?材料二 海上丝绸之路把丝绸远销海外,还把中国古代的发明创造,如(四大发明) 、 、 、印刷术、瓷器、医学、中草药等传布到世界各地。——陈炎《海上丝绸之路与中外文化交流》(2)请将材料二中三处画“_______” 的部分在答题卡上补充完整。材料三 明朝中期,随着日本国内社会动荡加剧,特别是由于明朝国力减弱,海防松懈,倭寇与中国海盗奸商等相互勾结,对中国沿海的武装抢劫日益猖獗。……沿海各地遭到重大破坏,时称“倭患”。——中国历史七年级下册 (3)根据材料三和所学知识,分析明朝中期出现“倭患”的原因是什么?倭寇猖獗之时,谁临危受命南下抗倭?

  • 2022年辽宁省营口市中考语文真题(解析版)

    2022年辽宁省营口市中考语文真题(解析版)

    十年春,齐师伐我。公将战,曹刿请见。其乡人曰:“肉食者谋之,又何间焉?”刿曰:“肉食者鄙,未能远谋。”乃入见。问:“何以战?”公曰:“衣食所安,弗敢专也,必以分人。”对曰:“小惠未遍,民弗从也。”公曰:“牺牲玉帛,弗敢加也,必以信。”对曰:“小信未孚,神弗福也。”公曰:“小大之狱,虽不能察,必以情。”对日:“忠之属也。可以一战。战则请从。”

  • 广西贺州市2021年中考语文试题(原卷版)

    广西贺州市2021年中考语文试题(原卷版)

    先帝知臣谨慎,故临崩寄臣以大事也。受命以来,夙夜忧叹,恐托付不效,以伤先帝之明;故五月渡泸,深入不毛。今南方已定,兵甲已足,当奖率三军,北定中原,庶竭驽钝,攘除奸凶,兴复汉室,还于旧都。此臣所以报先帝而忠陛下之职分也。至于斟酌损益,进尽忠言,则攸之、祎、允之任也。

  • 广西百色市2021年中考语文试题(原卷版)

    广西百色市2021年中考语文试题(原卷版)

    我开始格外关注这个笨小孩:凌乱的头发,额头上此消彼长的痘痘,瘦小的肩膀……明明是单薄的小姑娘,身体里却像是有使不完的能量,面对大大小小的挫折时她波澜不惊、一往无前地继续努力,偶有一丝焦虑掠过,也稍纵即逝。我不知道那压力如山的一天又一天,崔安然究竟是怎么扛下来的……这一切,都令人心疼。

  • 广西梧州市2021年中考语文试题(原卷版)

    广西梧州市2021年中考语文试题(原卷版)

    哲人有言,英雄的业绩、他们的言论,就是那个时代的精华。的确,英雄是一个民族的“凝结核”。如杨靖宇所言,“革命就像火一样,任凭大雪封山,鸟兽藏迹,只要我们有火种,就能驱赶严寒,带来光明和温暖。”英雄就是这革命的火种,没有英雄的引领,个体的力量就难以凝聚;缺少先锋的领路,前行的方向将难以看清。马克思因此感慨,“每一个社会时代都需要有自己的伟大人物”。

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