2020年广东中考英语专题复习二第6讲

1、第3讲,二次根式,2020年广东中考复习课件,第一章 数与式,1.了解平方根、算术平方根、立方根的概念，会用根号表 示数的平方根、算术平方根、立方根. 2.了解乘方与开方互为逆运算，会用平方运算求某些非负 数的平方根，会用立方运算求百以内的整数(对应的负整数)的 立方根，会用计算器求平方根和立方根. 3.了解二次根式、最简二次根式的概念，了解二次根式(根 号下仅限于数)加、减、乘、除运算法则，会用它们进行有关实,母有理化).,答案：B,答案：C,3.(2019 年广西)若二次根式 有意义，则 x 的取值范围 是_. 答案：x4,答案：B,答案：,(续表),。

2、第二部分第二章第1讲1(2019沈阳)计算：22cos 30|1|(2 019)0.解：原式42116.2(2019百色)计算：(1)3(112)02tan 60.解：原式13121235.3(2019怀化)解二元一次方程组：.解：，得2x8，解得x4.则43y1，解得y1.故方程组的解为.4(2018连云港)解方程：0.解：方程两边同乘x(x1)，得3x2(x1)0，解得x2.检验：当x2时， x(x1)0，所以x2是原分式方程的解5(2019齐齐哈尔)解方程：x26x7.解：x26x7，x26x979，即(x3)22，则x3.x3，即x13，x23.6(2018桂林)解不等式： x1，并把它的解集在数轴上表示出来解：5x13x3,5x3x<。

3、第二章 解答题(一)突破6分题,第1讲 实数的运算、解方程(组)与不等式(组),第二部分 专题突破,3,方法突破,4,【方法归纳】此类综合计算是必考题，要求全方位掌握各知识点，如三角函数值、开平方和开立方、零指数幂、正负指数幂、去绝对值、以及实数的加减乘除法则在计算时要各个知识点都要掌握好是解决此类问题的关键,5,6,7,8,9,10,11,解：解不等式，得x1. 解不等式，得x4.故原不等式组的解集为1x4. 不等式组的解集表示在数轴上如下：,【方法归纳】找不等式组解集的方法：同大取大，同小取小，大小小大中间找，大大小小无法找,12,13,随堂练习。

4、第二部分第二章第3讲1(2019贵港)尺规作图(只保留作图痕迹，不要求写出作法)：如图，已知ABC，请根据“SAS”基本事实作出DEF，使DEFABC解：如图所示，DEF即为所求2如图，利用尺规，在ABC的边AC上方作CAEACB，在射线AE上截取ADBC，连接CD，并证明：CDAB(尺规作图要求保留作图痕迹，不写作法)解：如图所示因为EACACB，所以ADCB因为ADBC，所以四边形ABCD是平行四边形所以ABCD3如图，在RtABC中，B90，A30，AC2.(1)利用尺规作线段AC的垂直平分线DE，垂足为E，交AB于点D；(保留作图痕迹，不写作法)(2)若ADE的周长为a，先化简T(a1)2a(a1)，再求T的。

5、第二章 解答题(一)突破6分题,第3讲 尺规作图综合题,第二部分 专题突破,3,一、线段的垂直平分线 【典例1】如图，在ABC中，C90，ACBC，D为BC上一点，且到A，B两点的距离相等 (1)用直尺和圆规，作出点D的位置；(不写作法，保留作图痕迹) (2)连接AD，若B37，求CAD的度数 【思路点拨】用尺规作图作线段AB的垂直平分线交BC于点D即可,方法突破,4,解：(1)如图，点D即为所求 (2)在RtABC中，B37， CAB53. 又ADBD， BADB37. CAD533716.,【方法归纳】尺规作图有五种基本作图：(1)作一条线段等于已知线段；(2)作已知角的角平分线；(3)作线段的垂直平分。

6、第二部分第二章第2讲1先化简，再求值：(2x)(2x)(x1)(x5)，其中x.解：原式4x2x24x54x1.当x时，原式415.2(2018嘉兴)化简并求值：，其中a1，b2.解：原式ab.当a1，b2时，原式121.3(2019永州)先化简，再求值：，其中a2.解：1.当a2时，原式1.4先化简，再求值：3，其中a.解：原式3a3.当a时，原式3.5(2019娄底)先化简，再求值：.其中a1，b1.解：ab.当a1，b1时，原式(1)(1)1.6先化简，再求值：，其中a1.解：原式.当a1时，原式1.7(2019黄石)先化简，再求值。

7、第二章 解答题(一)突破6分题,第2讲 化简求值,第二部分 专题突破,3,方法突破,4,【方法归纳】整式的化简求值往往要用到平方差、完全平方或整式的乘法等进行化简，然后再进行加减的运算，化到最简后才进行代入求值,5,6,7,【方法归纳】化简求值往往要用到因式分解，也就是要用到提公因式法和公式法，然后再进行加减乘除的约分，化到最简后才进行代入求值,8,9,随堂练习,。

8、第7讲 形容词和副词,专题二 语法知识,2020年中考复习课件,用括号内所给单词的适当形式填空 1.Most foreign visitors become _ (interest) in traditional Chinese culture than before. 2.Nowadays, English is _ (wide) used in the world because its far easier than any other language. 3.Volunteers are everywhere.You can find them _,(easy) in China.,more interested,(the) most widely,4.The soup was too _ (salt) because I put too much,salt in it.,easily,salty,healthy,5.Parents are paying more at。

9、第9讲 动词的时态和语态,专题二 语法知识,2020年中考复习课件,单项填空,C,D,(,)1.China successfully _ the World Horticultural,Exposition (世界园艺博览会) from April to October in 2019, with the topic “Green Living, Beautiful Home”.,A.hosts C.hosted,B.had host D.has hosted,(,)2.Wheres my packed lunch, mom?,In the kitchen.I _ two sandwiches for you.,A.makes,B.make,C.made,D.have made,(,)3.Its true that not every goal _ and not every,dream will come true.The most beautiful scenery is on the way.,A.achi。

10、第12讲 主谓一致,专题二 语法知识,2020年中考复习课件,用括号内所给单词的适当形式填空 1.Look! Each of them _ (bring) a birthday gift for,you.,brings,needs,was,is,goes,2.Either the players or the coach _ (need) to be there to play soccer now. 3.There _ (be) a dog and two cats in the house yesterday. But they are missing. 4.Three kilometers _ (be) a farther distance.Youd better catch a bus there. 5.Everybody except Mike and Linda _ (go) to school by bus every day.,主谓一致主要掌握它的三个原则：语法一。

11、第11讲 句子种类和成分,专题二 语法知识,2020年中考复习课件,句型转换，每空一词 1.There must be something wrong with my computer.(改为一,般疑问句),Must,anything,Dont,shout,_ there be _ wrong with your computer? 2.You shouldnt shout back to your parents while youre arguing with them! (改为祈使句) _ _ back to your parents while youre arguing with them!,3.Helen ever hardly watches TV shows.(变成反意疑问句) Helen ever hardly watches TV shows, _ _？ 4.This action movie is quite interesting, and。

12、第8讲 动词的分类,专题二 语法知识,2020年中考复习课件,单项填空,C,A,(,)1.Could I play the computer game now, mom?,No, youd better not.You _ finish your homework first.,A.might,B.could,C.must,D.can,(,)2.If you always _ yourself with others, you,may have tons of pressure. I agree.We should believe in ourselves.,A.compare,B.communicate,C.create,D.consider,(,)3.A true friend will never _ from you when,youre in trouble.,A.take away C.put off,B.run away D.get off,(,)4.Who does the schoolwork e。

13、第13讲 复合句,专题二 语法知识,2020年中考复习课件,单项填空,A,C,(,)1.What do you think of your Junior Middle School,life? I think its colorful _ I am always busy.,A.although,B.because,C.if,D.whenever,(,)2.Everyone wants to reach the top of the mountain, but,some climbers have to give it up _ it is too high.,A.while,B.unless,C.because,D.although,(,)3.If we _ take environmental problems seriously,D,B,the earth _ worse and worse. A.dont; wont be B.wont; isnt C.won。

14、第14讲 情景交际,专题二 语法知识,2020年中考复习课件,单项填空,D,C,(,)1.Would you like to come to dinner tomorrow evening?,_.,A.Yes, its true C.Its upstairs,B.You really do D.Yes, Id love to,(,)2._.Hope is all around you.,Thank you, Mr.Lin.,A.Dont be late again C.Never give up,B.Dont hurry up D.Never get proud,(,)3.I must go now.My plane is ready to take off.,Goodbye._.,A.Dont worry C.No problem,B.Have a good trip D.With pleasure,(,)4.Its nearly lunch time.How。

15、第4讲 数词,专题二 语法知识,2020年中考复习课件,用括号内所给单词的适当形式填空 1.Today is Childrens Day.Its on the _ (one) day of,June.,first,Thousands,twelfth,forties,2._ (thousand) of people come to Guilin for vacations every year. 3.I got a beautiful iPad on my _ (twelve) birthday. 4.My mother looks very young, but she is in her _,(forty).,twentieth,5.Our company lies in the _ (twenty) floor of the high building.,基数词的构成和用法,一、基数词的构成,1.112 对应的英文单词是独立单词，必须分别记忆。。

16、专题二 语法知识,第1讲 名词,2020年中考复习课件,专题二 语法知识,2020年中考复习课件,用括号内所给单词的适当形式填空 1._ (friend) are those who make you smile, always open their hearts to you and encourage you to succeed. 2.Thanks to the _ (clean), our city becomes more and,more beautiful.,Friends,cleaners,knives,3.These _ (knife) are used to cut special paper. 4.The _ (develop) of Al (人工智能) will enable us,to learn more about our brains.,development,minutes,5.The high-speed railway station is not。

17、第2讲 冠词,专题二 语法知识,2020年中考复习课件,专题二 语法知识,2020年中考复习课件,用适当的冠词(a, an, the 或/)填空 1.Dont tell a lie.You are _ honest boy. 2.Playing _ violin is fun for us all. 3.The Longest Day in Changan (长安十二时辰) is such _ wonderful TV play that I want to see it _ second,time.,an,the,a,a,4.I spend _ hour playing _ chess every day,and now Im very good at it.,an,/,the,/,5.In the United States, Fathers Day falls on _ third Sunday in _ June.,冠词是。

18、第5讲 介词,专题二 语法知识,2020年中考复习课件,单项填空,C,D,A,(,)1.Dont stay inside _ such a sunny morning.Lets,go out for a walk.,A.at,B.in,C.on,D.to,(,)2.I won the first prize in the exam, so I was proud,_ myself.,A.about,B.over,C.from,D.of,(,)3.The “teacher-free exam” means that students take,their exams _ teachers.Students must be more honest.,A.without,B.against,C.through,D.by,(,)4.Junior high school days will be over _ a,week.How are you feeling? Im trying to keep my c。

19、第3讲 代词,专题二 语法知识,2020年中考复习课件,用括号内所给单词的适当形式填空 1.Tomorrow is Toms birthday, and he invited _ (we),to his birthday party.,us,hers,mine,themselves,2.This new e-bike is Helens, and the orange mobike is _ (she), too. 3.Who is that boy wearing a white hat? Ben, a friend of _ (I). 4.To achieve their dreams, they need to depend on _,(they).,our,5.Building beautiful China is _ (we) common dream. We must succeed.,代词是用来代替名词或名词短语的词，按其意义、特征及 语法功能分。

20、第6讲 连词,专题二 语法知识,2020年中考复习课件,选词填空 1.We cannot change reality, _ we can change the eyes,which see reality.,2.Tom can do some things at home _ he is still young. 3.I wonder if you have made a decision on the project, Jack. Not yet.I cant make it _ I have first-hand information on prices. 4.Swimming is exciting.But kids cant do it _ they go,swimming with adults.,5.I like listening to the music _ it makes me relaxed.,but,though,until,unless,because,连词是一种虚词。