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（纵坐标相减）上减下 水平线 段 AB=|x1-x2|=x2-x1 （横坐标相减）右减左 知识导航 第一课 二次函数与线段最值 2 让学习更高效 例1. （原创题）如图，已知二次函数 2 23y x x 

.............................. 78 7.《中共中央纪委关于严格禁止利用职务上的便利谋取 不正当利益的若干规定》 ............................

1 基础看这个帖⼦的⾼中⼩弟弟⼩妹妹⼀定要按着我的思路推导⼀遍，然后再合上电脑思考⼀遍是不是有什么地⽅有卡壳的，如有卡壳再看着我的帖⼦去记忆，祝愿各位⾼考取的好成绩。⿊体为主。看完本帖并且跟着思路⾛⼀遍，记住三⾓函数的所有函数。⾸先，有正弦余弦的和差公式的函数需要记住。sin(A ± B) = sin A cos B ± cos A sin Bcos(A ± B) = cos A cos B ∓ sin A sin B(1)记忆⽅法： 观察这两个公式，分别叫正弦和余弦，正弦可以联想到正义，那么余弦就可以联想到⼩⼈了。君⼦可以不同的在⼀起合作（正弦的公式⾥⾯包含sin和cos ）⽽且表⾥如⼀（正负号）；⼩⼈⼀般是跟⾃⼰⼀样的⼈在⼀起（cos 在⼀起，sin 在⼀起），⽽且喜欢把⾃⼰⼈放在前⾯（cos 在前），表⾥不如⼀（正负号）。 以上，你就记住了sin(A ± B) cos(A ± B)了，我们接着记。

∴ 1 1 6 4 122 2AOC AS COy= ⋅ =××=△ 13. 【中】（初二数学下期末复习反比例函数）如图：已知一次函数 与 x 轴、y 轴分别交于点 D、C 两点和反比例函数 交于 A、B

有变，我国是世界最大发展中国家 的国际地位没有变。请结合实际，谈一谈如何认识邓小平社会主义初级阶段及其本质的 理论？ 说明：资料为 2020 春期国开专科《毛泽东思想和中国特色社会主义理论体系概论》基于网络终结性考

的精神力量，创造出强大的实践伟力，引导中国 人民站立起来。你是如何理解毛泽东思想活的灵魂的科学内涵及其相互关系？（100 分） 说明：资料为 2020 春期国开专科《毛泽东思想和中国特色社会主义理论体系概论》基于网络终结性考

的精神力量，创造出强大的实践伟力，引导中国 人民站立起来。你是如何理解毛泽东思想活的灵魂的科学内涵及其相互关系？（100 分） 说明：资料为 2020 春期国开专科《毛泽东思想和中国特色社会主义理论体系概论》基于网络终结性考

G” 汤 中 华 人 民 共 和 国 国 家 标 准 G B 2 10.1- 2004 工业碳酸钠及其试验方法 第 1 部分 ：工业碳酸钠 Specification and determ intion

的精神力量，创造出强大的实践伟力，引导中国 人民站立起来。你是如何理解毛泽东思想活的灵魂的科学内涵及其相互关系？（100 分） 说明：资料为 2020 春期国开专科《毛泽东思想和中国特色社会主义理论体系概论》基于网络终结性考

的精神力量，创造出强大的实践伟力，引导中国 人民站立起来。你是如何理解毛泽东思想活的灵魂的科学内涵及其相互关系？（100 分） 说明：资料为 2020 春期国开专科《毛泽东思想和中国特色社会主义理论体系概论》基于网络终结性考

的精神力量，创造出强大的实践伟力，引导中国 人民站立起来。你是如何理解毛泽东思想活的灵魂的科学内涵及其相互关系？（100 分） 说明：资料为 2020 春期国开专科《毛泽东思想和中国特色社会主义理论体系概论》基于网络终结性考

日期(www.cnki.net)：2016-05-24 生物实验室 四重 PCR 检测副溶血性弧菌及其毒力基因方法的建立 林佳琪 1 苏国成 1,2 黄建炜 3 陈泽辉 3 周常义 1,2* (1. 集美大学食品与生物工程学院

Ⅰ. 用适当的关系词填空1. The Second World War __________ millions of people were killedended in 1945.2. He was born in the year __________ the Anti-Japanese War brokeout.3. He was the man by __________ Master of Game was translated.4. Is that the reason __________ you are in favor of the proposal?5. The magazine for __________ Betty paid one dollar was very good.6. Here is so heavy a box __________ can be lifted by nobody.7. Is this the shop __________ sells children’s clothing?

Ⅰ. 根据汉语提示写出单词的正确形式1. What will happen if the two parties fail to reach an ____________ (协议)?2. Strict management is one of the most important ____________ (特点)of my school.3. Shanghai is one of the ____________ (地区)in China with developedeconomy and culture.4. My cousin makes a living by selling agricultural ____________ (产品)inthe market.5. There were ____________ (代表)from 24 countries in the meeting Ijust returned from.6. There is a garden on the ____________ (对面的)side of the street.7. I forgot to ____________ (签名)the application form.8. A king must teach his prince how to ____________ (统治).

Ⅰ. 阅读理解In most developed countries the government providesfree education for children because it realizes that educatedcitizens are useful to the country in their later life. Mostcountries also have private education. This means that parents can payto send their children to certain schools. People who agree with thissystem say that it gives parents a larger choice of schools. Other peoplethink that private schools give the children who go to them an unfairadvantage over other children.

Ⅰ. 选词填空ancient, architect, birthplace, civilization, face, gallery, landmark,project, situated, symbol1. The wedding ring is a _____________ of our love.2. Rome is famous for its _____________ monuments.3. The Empire State Building is a famous _____________ of New York.4. China is well-known for her five thousand years of _____________ .5. Asia is the _____________ of the great religions of the world.6. The government began a new _____________ in my hometown last

Ⅰ. 阅读理解It was once thought that air pollution affected onlythe area immediately around large cities with factoriesand heavy automobile traffic. Today, we know thatalthough these are the areas with the worst air pollution,the problem is actually worldwide. On several occasions over the pastdecade,

Ⅰ. 单词拼写1. Who is keeping __________ (秩序)on the spot?2. Whether or not you’re given a car depends on your __________ (地位)in the company.3. He __________ ( 辞 职 )from the company in order to take a morechallenging job.4. Boys and girls are __________ (平等的), and thus they should betreated fairly.5. The project worked on the __________ ( 原 则 )that each person’sexperience was equally valuable.6. Regular exercise is of great __________ (重要)to us.7. We have been treated with such __________ (善良)by everybody.8. I’d just like to __________ (强调)the importance of politeness in thisjob.

Ⅰ. 把下列句子改为被动语态1. He had broken his arm when I saw him.2. Lucy had already completed the project when I arrived.3. I had sold out the ticket when she came.4. They began to climb the mountain after they had bought all the foodand drinks.5. I had turned off all the lights before I went to bed.答案：1. When I saw him his arm had been broken.2. When I arrived the project had already been completed.

Ⅰ. 根据所给的汉语释义或首字母写出单词的正确形式1. Although he is young, he is an __________ (有经验的)architect.2. As a matter of fact, drunken driving is as harmful as __________ (暴力的)crimes to people’s life and safety.3. What __________ (引起)the accident yesterday?4. A sudden storm __________ (发生)when we were having our pleasantvoyage in the Yellow River.5. One million and five hundred thousand people died in natural dbetween 1980 and 2000.6. He has to give up basketball, for he is only about a __________ height.7. In 1998, the f __________ caused by five days of heavy rain in thatarea made 233, 000 people homeless.8. People standing under a tree in a thunderstorm are likely to be struckbyl __________ .9. Many men were b __________ underground when there was anaccident at the mine.