如何判断根号下和绝对值内绝对值代数式的最小值怎么求正负

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单项选择题若有代数式根号下n的x次方+e的x方的绝对值(其中e仅代表自然对数的底数,不是变量)则一下能正确表示该代数式的C语言表达式的是【
】。A.B.C.D.
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【】可以用一条上的点表示数,这条直线叫做数轴(number&axis).原点(origin)、正方向(positive&direction)和单位长度(unit&length)称为数轴三要素,它们.示例如图:【数轴与实数】数轴上的点与实数一一对应.【数轴的性质】数轴上从左往右的点表示的数是从小往大的顺序,那么利用数轴可以比较数的大小.在数轴上表示的两个数右边的总比左边的大;正数都大于零;负数都小于零;正数大于一切负数.另外由于数轴是一条直线,是可以向两端无限延伸的,因此没有最小的负数,也没有最大的正数.
【】一般的,上表示数&a&的点与原点的距离,叫做数&a&的绝对值(absolute&value),记作&|a|,读作&a&的绝对值.数轴上表示数&a&的点到表示数&b&的点的距离,记为&|a-b|&.
【的乘法运算律】1.两数相乘,同号得正,异号得负,并把相乘;2.任何数与0相乘,都得0.
整理教师:&&
举一反三(巩固练习,成绩显著提升,去)
根据问他()知识点分析,
试题“已知:a、b、c在数轴上如图,完成下列各题:(1)式子abc...”,相似的试题还有:
已知有理数a,b,c在数轴上对应点的位置如图所示,(1)填空:b-c_____0,c+a_____0(填“>”、“<”、“=”)(2)化简:|b-c|+2|c+a|-|b+c|.
有理数a,b,c在数轴上的位置如图所示,(1)c_____0;&a+c_____0;b-a_____0&(用“>、<、=”填空)(2)试化简:|b-a|-|a+c|+|c|.
有理数a,b,c在数轴上的位置如图.(1)c_____0;a+c_____0;(用“>、<、=”填空)(2)试化简:|a-b|-|a+c|+|c|.相关内容:
教师节作文:给老师的一封信敬爱的崔老师:您好!老师,教师节快到了,我情不自禁地想起你了,小时候的点点滴滴又闪现在我的眼前。您还记得吗?那个清爽的早晨,我第一次来到一个所谓“学校”的地方,我胆怯地站着,您走过来,白皙的皮肤细腻而白嫩,秀丽的长发随意地放在肩上,那双明亮的大眼犹如一汪泉水清澈、透亮,闪着灵动的光芒。那樱桃般的小嘴,两瓣鲜艳的唇,轻轻地弯起一个弧,那么文静,那么美!您就带着一缕微笑,犹如一阵清风,闯进了我的眼中。我不再胆怯,微笑着将我的小手放在您向我伸来的掌心中。从此,您便成了我的老师。您会在我回答不出问题时,给予我鼓励,只要看到您的眼,我便会静下心来,答案也不假思索地脱口而出;您会在我睡不着觉时轻轻给我盖被子,讲故事给我听,声音柔柔的;您会在我哭泣的时候抱着我,让我坐在您的腿上,给我讲故事,柔声细语,温语如春。我默默地听着,心情也慢慢开心起来。时光飞逝,快乐的时光总是非常短暂,我要离开这个地方了,我要离开我的老师了。我还依稀记得,您用期待的眼神望着我,让我好好读书,我用力地点头。崔老师,如今的我,已是一名初中生了,我没有让您失望,我在那条您对我充满期待的路上努力学习整整7年了。老师,我正在向着理想前进,我要用功,来换取您的笑脸。您那张美丽的笑脸,温暖了我的心,让一个孩子感受到了很多的关爱与温暖。老师,我一定不会让您失望的!我总有一天会成功,我会带着微笑站在您面前,我会让您为我,为您的学生感到自豪的,会的,一定会的。最后,祝老师健康美丽、万事如意、节日快乐,!&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&& 您的学生 沈一诺&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
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教师节写给老师的一封信敬爱的刘老师:您好!伴随秋姑娘轻快地脚步,我们又迎来了一个教师节。此时此刻,我第一个想到的人就是您!我眼前浮现出您那和蔼可亲的样子。您那黑法里已经夹杂了一些白丝,那是教导我们而留下的印痕呀!每次看到您那张苍老的脸,我就仍不住告诉自己:“一定要努力学习,报答您对我的教育之恩。”您是一位尽职尽责的好老师。不管春夏秋冬,您都一无既往地站在讲台上为我们上课,几乎没落下过一节课,您就像蜡烛,燃烧了自己,照亮了学生;您就像海绵,把自己的最后一滴水都用在了我们身上。我们爱您,亲爱的老师。记得我不是一个勤快的人,您就苦口婆心的教育我:“作为一个女孩子,你应该手脚利落点,否则长大了咋办?”我想也是,从那以后,我学会了叠被子、扫地等许多生活小事。为此,我要说:“老师,谢谢您!”……这时,我纵有千言万语也难以表达我对您的崇敬之情;我只能说句:“老师,我爱您!”祝您:身体健康!万事如意!&&&&&&&&&&&&&&&&&&&&&&&&&&&& 您的学生:唐XX
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puters be used more than books in the future?3. Here it is.& 三、听懂有关发明及其应用的对话并能谈论已有的发明创造给人类生活带来的变化。自主预习新词自测读写单词并熟记看谁记得快。1.网站 n.&& website 2.教科书n.&& textbook 3.大部分地adv.&& mainly 4.页;一页(纸)n.&& page 5.电子的adj.&& electronic 6.有影响力的adj.&& powerful 7.满的;充满的adj.&& full 8.修补挽救v.&& fix 9.说明书(复数)n.&& instructions 10.合适地;正确地adv.&& properly 。课堂导学1. Dad , can I borrow your camera ?爸爸我可以借用一下你的相机吗。单词1:borrow借入;借来 borrow为动词,意为“借入;借来”。borrow常与介词from连用,构成短语borrow sth. from sb.,意为“从某人那里借来某物”。He& borrowed& a car& from& his friend , and went to the airport in a hurry.他向朋友借了一辆小汽车,然后匆匆忙忙地去了机场。拓展:lend的用法lend为动词,意为“借出,借给”。常用短语lend sth. to sb.相当于lend sb. sth.,意为“把某物借给某人”。Can you lend a piece of paper to me ?你能借一张纸给我吗He often lends me some books.他经常借给我一些书即学即练一单项选择 - Jim , may I&&& D&&& your camera ?- Sure , but you’d better not&&&&&&& it to others.A. lend &&B. borrowC. borrow&&D. lend解析:borrow,意为“借入”,常与介词from连用,即borrow sth. form sb.,意为“从某人那里借来某物”。lend意为“借出,借给”,常用短语lend sth. to sb.,意为“把某物借给某人”。根据句意可知选D。2.They’ll be put up on the school website.照片将被放在学校的网站上。短语1:put up挂;张贴put up是固定短语,在这里意为“挂;张贴”。put up还可意为“建立;搭起;举起”。该短语是动副短语,后接代词作宾语时,代词只能放在put 与up之间。We’ll& put them up& again after the rainstorm.当暴风雨过后,我们会再把它们挂起来They& put up& many buildings last year.去年他们盖了许多高楼。即学即练二根据汉语意思完成句子在天黑前野营的孩子们搭了个帐篷住了下来。The children who had a picnic&& put&&&&& up&&&& a camp to live in before the dark.3…we waited for weeks to hear from our pen friends abroad.……我们要等好几周才能收到国外笔友的信。短语2:hear from sb.收到某人的来信 hear from sb.是固定短语,意为“收到某人的来信”。hear from ..相当于get /receive a letter from…。I look forward to& hearing from you&& in the near future.我盼望很快收到你的来信即学即练三单项选择How often does LiMei& get a letter from& her parents ?选出与画线部分意思相同或相近的选项&&& C&& A. hear &&B. hear ofC. hear from &&D. hear about解析:get a letter from sb.,意为“收到某人的来信”。hear意为“听见”,hear of意为“听说”,hear from意为“收到……的来信”。Hear about意为“得知”。故选C。4.Some are huge ones with thousands of pages.有些书很厚有几千页。短语3:thousands of 好几千;成千上万thousands of,意为“好几千,成千上万”。thousand意为“一千”,用来表示不确定的数目时,thousand应变为复数,且在后面加of。Every year& thousands of& trees are planted on the hills to protect the environment.每年人们会在山上种植成千上万棵树来保护环境拓展:与thousand用法类似的词Hundred (百), thousand (千), million (百万)等表示概数时,本身要用复数形式,后接“of+可数名词复数”,即“hundreds/thousands/millions +of+名词复数”,意为“数以百/千/百万计的……”。若这些数量词前有基数词,则直接用hundred /thousand/million等,不用复数形式,也不加of。 It cost me two hundred dollars.它花了我200美元The restaurant receives hundreds of customers every day.这家饭店每天接待数以百计的顾客即学即练四单项选择There are over&&& D&&& students in their school.A. hundreds&&B. nine hundredsC. hundreds of&&D. nine hundred解析:根据over可知空格处表示具体数目,hundred应用单数形式,并且不与of连用。故选D。&Unit 2学习目标一、掌握本单元development ,spread,look through,at a time等单词和短语。(重点)二、能读懂谈论发明创造的文章,了解发明对人类生活的影响;能用被动语态的句子表述发明对人类的影响,并恰当使用as a result和so。(重点)自主预习& 英汉互译。1.在某人去……的路上&& on one’s way to& 2.look through magazines&&&& 浏览杂志& 3.每次;一次&& at a time& 4.by hand&&& 用手;靠手做& 5.在某种程度上&& in a way& <pare… to...&&&&& 把……比作…… 7.wait and see&&&& 等等看;等着瞧&& 课堂导学1. Every evening , my mother looks through magazines at home.每天晚上,我妈妈都要在家浏览杂志。短语1:look through 快速阅读;浏览look through在该句中,意为“快速阅读;浏览”。look through还可意为“透过……看去,穿过……看去”。I& look through& the news in the newspaper every day.我每天都浏览报纸上的新闻We& looked through& the bedroom window and saw a beautiful garden.我们透过卧室窗户看到了一个美丽的花园。即学即练一 单项选择- Would you please&&& B&&& the paper for me and see if there are any obvious(明显的) mistakes ?- Of course I will.A. look around &&B. look throughC. look up&&D. look into解析:look around,意为“环顾”;,look through意为“快速阅读,浏览”,look up意为“查找”,look into意为“调查”根据句意可知选B。2. In those days , books were only produced one at a time by hand.在那时候,书只能用手工每次生产一本。短语2:at a time 每次;一次at a time,意为“每次;一次”,多用于句末作状语,常与表示数量的词搭配使用。Diana often lets her son answer one question& at a time .戴安娜经常让她的儿子一次回答一个问题辨析:at a time与at times的区别at a time,意为“每次;一次”。at times相当于sometimes,意为“有时,偶尔”,说明事情不止一次发生。She runs up two stairs at a time. 她一步两个台阶地跑上楼梯He can be really bad-tempered at times.他有时候脾气可真坏短语3:by hand用手;靠手做by hand,意为“用手;靠手”。做用作介词,在这里表示方式、手段,意为“通过……的方式”。The toy was made& by hand& .这个玩具是手工制成的We prepare for the test& by& studying together.我们通过一起学习来准备考试即学即练二单项选择1.Don’t try to do everything at once . Take it a bit&&&& D&&& .A. at times&&B. at that timeC. at all times&&D. at a time解析:根据第一句句意“不要试图一下子就把所有的事情做了。”可知,第二句表示“一次只做一点”。表示“每次;一次”用at a time。故选D。2. Before the invention of the printing press , people wrote every book&&& A&&& hand with a pen.A. by &B. in&C. on&D. to解析:句意为“在印刷机发明之前,人们用笔手写每一本书”。by hand为固定短语,意为“用手;靠手做”。故选A。 3.A much larger amount of information can be stored in more varied forms on the Internet than in books.更多的信息可以以不同的形式存储在因特网上而不是书上。单词1:amount 量;数量a large amount of ,意为“大量的”,为固定短语,amount意为“量;数量”,通常用于an amount of , a great/large amount of , amounts of 这类结构,其后通常接不可数名词。He made&& a large amount of&& money.他赚了很多钱I had not expected such an& amount of& praise.我没料到会受到这么多赞扬拓展:an mount of , a large/great amount of , amounts of 修饰名词用作主语时,其谓语的数取决于amount的数。A large amount of money was spent on the bridge.= Large amount of money were spent on the bridge.在这座桥上花了大量资金即学即练三 根据汉语意思完成句子她携带大量的现金离开了She carried&&& a&&&&&& large&&& amount&&&& of&&& cash and went away.&Unit 3学习目标一、掌握一般将来时和带有情态动词的被动语态的概念和用法。(重点)二、培养学生的写作能力和技巧学会在短文写作中应用一般将来时的被动语态。自主预习单项选择1.- It’s difficult for the village children to cross the river to go to school.- I think a bridge&&& D&&& over the river.A. was builtB. is being built& C. has been builtD. should be built2.- Where can the music&&& C&&& ?&- On MP5 players.A. play&&B. playedC. be played&&D. be playing课堂导学Through the Internet , email allows us to communicate nearly instantly with people thousands of miles away.通过因特网电子邮件让我们可以立即与千里之外的人交流。短语1:allow sb. to do sth. 允许某人做某事allow 是动词,意为“允许;准许”,常用短语allow sb. to do sth.,意为“允许某人做某事”。其被动结构be allowed& to do sth.,意为“被允许做某事”。Helen didn’t& allow me to driver& her car.海伦不允许我开她的汽车。拓展:allow 的其他用法 allow后如果接的是sb. 则sb.后要接动词不定式;如果其后直接接动词,则应用动词的-ing形式。They don’t allow talking here.他们不允许在这儿说话即学即练单项选择Sorry , we don’t allow&&& C&&& in the lecture room.& A. to smoke &&B. smoke C. smoking&&D. to smoking解析:句意为“对不起,我们不允许在演讲室里吸烟”。被动结构be allowed to do sth.,意为“被允许做某事”,主动结构allow doing sth.,意为“允许做某事”。故选C。&语法规律总结一般将来时的被动语态一、一般将来时的被动语态的构成:1.一般将来时的被动语态的肯定式为: shall /will +be+ done (shall用于第一人称,will用于各种人称)We shall be punished if we break the rule.如果我们违反规定,我们将会受到惩罚。Many buildings will be built in my home town我的家乡将要建造许多大楼。2.一般将来时的被动语态的否定式: shall / will + not +be +done(可缩写成shan’t或won’t)The meeting won’t be held tomorrow.& 明天不会举行会议。3.一般将来时的被动语态的一般疑问句需将shall / will 提到主语的前面。回答用yes 或no。- Will the work be finished at once ?这项工作会立刻被完成吗?- Yes , it will be.是的,立刻就被完成。4.一般将来时的被动语态的特殊疑问句式为: 疑问词 + shall /will +主语+ be +done.What shall I be given as my birthday presents ?我会得到什么生日礼物呢When will these books be published.这些书将在什么时候被出版二、一般将来时的被动语态的其他结构:1.be going to be done.You are going to be invited to the party by them.你将会被他们邀请参加那个晚会2.bo to be doneThe sports meeting is to be held on April 10.运动会将于4月10日举行三、一般将来时的被动语态的用法:1.一般将来时的被动语态同它的主动语态一样,表示根据计划或安排将要发生的被动性动作。 A lot of athletes will be invited to Beijing.许多运动员将被邀请到北京来。2.在时间、条件状语从句中,常用一般现在时的被动语态代替一般将来时的被动语态。If I am given enough time , I will go to Japan for my holiday.如果我有足够的时间,我将去日本度假。即学即练单项选择1. A basketball match between Class One and Class Three&&& D&&& tomorrow afternoon.A. is held&&B. was heldC. must be held&&D. will be held解析:主语和谓语动词之间是被动关系,应用被动语态。从时间状语tomorrow afternoon可知,应该用一般将来时的被动语态。故选D。2.In the near future , more advances in the robot technology&&& D&&& by scientists.A. are making&&B. are madeC. will make&D. will be made&
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e fat in China.根据作者所写,中国有越来越多的孩子们变胖。&即学即练二单项选择& B&& the instructions , you must take the medicine after meals.A. Because of&&B. According toC. Thanks to&&D. Instead of解析:句意为“根据说明书,你必须在饭后吃药”,Because of意为“由于,因为”,According to意为“根据”。Thanks to意为“多亏”,Instead of意为“而不是,取代”。故选B。3. They wear special hats that keep the files away.他们戴着能把苍蝇赶走的特殊的帽子。短语2: keep sth. away (使)避开;(使)不靠近keep sth. away,意为“(使)避开;(使)不靠近”。You’d better& keep& the polluted water& away& in order to keep healthy.为了保持健康,你们最好能远离受污染的水。拓展:keep的用法keep为动词,意为“保持”,“keep sth. +介词(短语)/副词”,意为“使某物处于某种状态”;keep后还可接形容词或介词短语作表语。常用短语keep sb./sth. doing,意为“让某人/某物一直做”,强调动作的持续性。 It’s hot here. Let’s keep the window open.这儿太热。我们还是让窗子开着吧。I’m so sorry to have kept you waiting for so long.非常抱歉让你等我那么长时间。即学即练三根据汉语意思完成句子在夏天空调可以让热空气远离。The air conditioner can&& keep&& the hot air&& away&& in summer.4.The scissors that they’re holding are used to cut the wool off the sheep.他们拿着的剪刀是用来从羊身上剪羊毛的。短语3:cut off 剪掉;切掉;割掉cut off是固定词组,意为“剪掉;切掉;割掉”,后跟名词或代词作宾语。当宾语为代词时,代词应放到cut与off之间;当宾语为名词时,名词放在off的前后都可以。He had his finger& cut off& in an accident at work.他在一次工作事故中切断了手指。归纳:含cut的其他常用短语cut down 砍倒;降低;缩短cut out 切掉;突然停止 cut one’s hair 理发cut in 插嘴即学即练四单项选择With electricity&& B&& because of the road repairs , the whole building was completely dark.A. cut up&&B. cut offC. cut out&&D. cut down解析:cut up,意为“切碎”,cut off意为“切断”,cut out意为“剪掉”,cut down意为“砍倒;减少”。句意为“由于修路电被切断后,整个大楼一片漆黑”。故选B。5. I hated the ants that were all over the place.我讨厌蚂蚁,那里到处都是。单词1: hate憎恨;讨厌hate作及物动词,意为“憎恨;讨厌”,hate不用于进行时态,其后可接名词、代词、动名词和动词不定式作宾语。My sister& hates& the smell of smoke. 我妹妹讨厌烟的气味I& hate& lying and cheating.我讨厌说谎与欺骗辨析:hate to do sth.与hate doing sth.的区别 hate to do sth多表示具体的一次性的动作,而hate doing sth.多表示习惯性的、经常性的、一般性的动作。I hate to do some chore after school 我讨厌放学后做家务当。Lucy hated eating meat when she was a child.露西是个孩子的时候,她讨厌吃肉。即学即练五单项选择-&What do you think of action movies ?-&They ‘re OK . I don’t&& B&& them.A. love &B. hate &C. mind&D. stand解析:句意为“你认为动作电影怎么样?”“还行。我并不讨厌它们。”A项意为“喜欢“;B项意为“讨厌”;C项意为“介意”;D项,意为“站立;忍受”。故选B。&Unit 2学习目标一、掌握本单元period,spirit,relationship,be surprised at…等单词和短语。(重点)二、能读懂介绍旅游的文章理解语篇主题和细节三、能运用课文中的重点单词及短语等按事情发生的先后顺序描述旅游经历。自主预习根据句意及汉语提示完成单词。 1. Mary felt much better after a& period& (阶段) of medical treatment.2.Cancer destroyed (破坏) her body but not her&& spirit (精神).3.The&& relationship (关系) between the police and the local people has improved.4.A distant(远距离的)& relative (亲戚) is not as good as a near neighbour.5.I& surf (冲浪) the Internet two hours a day。课堂导学1.At the moment , we are staying near Ayers Rock.此刻,我们在艾尔斯岩附近。短语1: at the moment现在,此刻at the moment是介词短语,意为“现在,此刻”,常与现在进行时或一般现在时连用。 moment是名词,意为“片刻,瞬间”。The Smiths are having dinner at home& at the moment 史密斯一家人此刻正在家里吃饭.。&At the moment& I am not hungry.我现在不饿&&& 即学即练一单项选择The thief was caught stealing money from the shop opposite the school and& C&& by the local police at the moment.A. was questionedB. had questionedC. is being questionedD. has been questioning解析:句意为“小偷被抓住在学校对面的商店偷钱,现在正在被警察询问”。由时间状语at the moment(现在)可知要用现在进行时,且the thief和question是被动关系,应用现在进行时的被动语态。故选C。2…and I was surprised at how big it was : 3.6 kilometres long and 348 metres high!……我对它如此之大感到惊奇:长3.6千米,高348米。短语2:be surprised at…对感到惊奇/吃惊 be surprised at…,意为“对感到惊奇/吃惊”。surprised为形容词,意为“感到吃惊的”,一般用来修饰人,be surprised后还可接动词不定式或that引导的宾语从句。I& am very surprised at& his great progress.我对他取得的巨大进步感到惊讶。He& was surprised to& hear the news.听到那个消息他很吃惊They& were all surprised that& we really went to the desert.我们真的去了沙漠这让他们所有人感到吃惊。即学即练二单项选择The fans were&& D&&& to know the death of their favorite singing star Whitney Houston.A. glad&B. angry&C. Excited& D. surprised解析:句意为“粉丝们知道他们最喜爱的歌星惠特妮&#8226;休斯顿死亡的消息时很惊讶”,glad意为“高兴的”,angry意为“生气的”,Excited意为“兴奋的”,surprised意为“惊讶的”。3…the colours of the rock turn dark blue ,purple ,yellow and red.岩石的颜色变成深蓝色,紫色,黄色和红色。单词1:turn变成;变得 turn作系动词时,意为“变成;变得”,后常接形容词作表语。His face& turned& red because he couldn’t answer the teacher’s question.他的脸变红了,因为他没能回答上老师的问题。即学即练三单项选择In autumn when leaves&& B&& yellow, they soon begin to fall down to the ground.A. keep&&B. turnC. stay&&D. turned解析:keep, turn, stay三个词都可作系动词,后接形容词作表语。keep和stay都表示“保持”;而turn表示“变得,变成”,符合句意且句子应该用一般现在时。故选B。&Unit 3学习目标一、掌握that引导的定语从句的用法。(重点)二、能运用本单元所学的知识询问他人的旅游经历或描述自己的旅游经历。自主预习将下列句子改为含有定语从句的句子1. Zhai Zhigang became the first Chinese astronaut to walk in space&Zhai Zhigang became the first Chinese astronaut& that&&&& walked& inspace.2. It is the most beautiful city . I have visited the city.&It is the most beautiful city& that&&&& I&&& have&& visited .3. A robot is a machine .A robot can do some difficult work.& &A robot is a machine& that&& can&&&&& do&&& some difficult work.课堂导学1.Australia has more beaches than any other country – more than 10000!澳大利亚的海滩比其他任何国家的海滩都要多——超过1000个。短语1:any other任何其他的any other,意为“任何其他的”,后接可数名词单数,通常用于比较级句型,多用于同一范围内相比较。常可与“the other+可数名词复数”或the others互换。Lucy is more careful than& any other student& in her class.露西比她班里其他任何一个学生都仔细Lucy is more careful than& the other students& in her class.露西比她班里其他所有的学生都仔细即学即练一单项选择-&&& A&&& do you think of the basketball match?&&&& - It’s perfect . It’s more exciting than&&&&&& match that I have ever watched.A. W any other&&B. H any otherC. H any others&&D. W any others解析:句意为“你觉得这场足球赛怎么样?”“它很完美。比我以前看过的任何一场比赛都要精彩得多”。What do you think of…表示“你认为……怎么样?”“any other+单数可数名词”表示“任何其他的”。故选A。2.But my mum says that it rained a lot .但我妈妈说那里常下雨。短语2:a lot 非常;十分a lot可用作程度副词,含有“非常;十分”之意,用来修饰动词或动词短语,也可以修饰形容词的比较级。It snows& a lot& at this time of the year.每年的这个时候都经常下雪。I’m feeling& a lot& better.我感觉好多了。即学即练二 单项选择-&Don’t worry, let me give you a hand.-&Thank you&&& B&&& A. lots of &B. a lot&C. many&D. much解析:修饰动词短语thank you应用程度副词,a lot意为“非常;十分”,thank you a lot意为“非常感谢”。故选B。&语法规律总结that引导的定语从句一、定语从句的定义在复合句中起定语作用、修饰句中的名词或代词的从句,被称为定语从句被修饰的名词或代词被称为先行词。定语从句由关系代词或关系副词引导。当关系代词作定语从句的主语时,定语从句的谓语动词的人称和数取决于先行词的人称和数。二、that引导的定语从句that引导定语从句时,可以指事物,也可指人,在从句中作主语或宾语。作宾语时,常可省略。需要注意的是:that前不能有介词;that不能引导非限制性定语从句。There are some films (that) I’d like to see.有几部我想看的电影。 She is the only one among us that knows French.她是我们当中唯一懂法语的人。三、当先行词为物时,只能用that而不能用which的情况1.当先行词是all, everything ,nothing ,something ,anything ,much, little ,few等不定代词时。There is nothing that can prevent him form doing it .没有什么能阻止他干那件事。2.先行词被序数词修饰时。The first place that they visited in Guilin was Elephant Trunk Hill.在桂林他们参观的第一个地方是象鼻山。3.先行词被形容词最高级修饰时。This is the best film that I have ever seen.这部电影是我看过的最好的一部。4.先行词被the very , the only等修饰时。Mr Smith is the only foreigner (that) he knows.史密斯先生是他认识的唯一的外国人。This is the very dictionary (that) I want to buy.这正是我要买的词典。即学即练单项选择1. – Have you been to the new Sports Center&&& D&&& is just opened in town ?&- No, not yet.A. where&&B. whoC. when&&D. that解析:句意为“你去过镇上刚开的新体育中心吗?”“还没有”。The new Sports Center为先行词且在从句中作主语,指物,因此用that引导后面的定语从句。2. Beijing blind is something&&& C&& most people can’t imagine. A. who&&B. whatC. that&&D. whom解析:先行词是something,且定语从句缺宾语,关系代词用that。故选C。
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puters?人们怎样处理他们的旧的但还能用的电脑呢?辨析:do with与deal with的区别 (1)&do是及物动词,后面可接宾语,因此do with要与可作宾语的疑问代词what连用构成特殊疑问句。(2)&deal是不及物动词,因此要与疑问副词how连用构成特殊疑问句I don’t know what the do with the problem.= I don’t know how they deal with the problem.我不知道他们如何处理这个问题。即学即练一单项选择What are you going to&&& A&&& the money you have got.A. do with&&B. doing withC. deals with&&D. deal with解析:be going to 是一般将来时的结构, to后面应接动词原形,因此排除B、C两项。Do with与what搭配使用,而deal with常与how搭配使用,因为该题干中是what, 所以只能用do with。故选A。 2. Do you divide the waste into things to recycle and things to throw away ?你将废物分成要回收的和需丢弃的两类吗。单词1: divide 分开分隔divide是动词,意为“分开;分隔”,是指把一个整体分成若干部分。常用短语divide…into…,意为“把……分成……”。Please& divide& the apple& into& four pieces.请把这个苹果分成四块辨析:divide与separate的区别(1)&divide指把整体划分为若干部分,被分开的对象在一定的条件下具有一定的统一性。Let’s divide ourselves into several groups.我们分成几个小组吧(2)&separate,意为“分离;隔离”,常与form连用,表示“把……从……分离”,指把原来连在一起或靠近的各个部分分隔开来,被分隔的对象没有任何统一性。Will wants to separate his music career from his movie career.威尔想把自己的音乐事业和电影事业分开。短语2:throw away 扔掉;丢弃throw away是动副短语,意为“扔掉;丢弃”,后接代词作宾语时,代词须放在短语中间。We have to& throw away& some things because they are bad to us.我们不得不丢弃一些东西,因为它们对我们是有害的。Remember to& throw it away& .记得把它扔掉即学即练二一、单项选择 You can&&& C&&& the cake&&&&&&& then pieces.A. divided& ; into &&B. intoC. into&&D. into解析:句意为“你能把这块蛋糕分10成份”。Divide…into…意为“把……分成……”,题干中的主语you是divide这一动作的执行者,故应用主动语态,can后接动词原形。故选C。二、根据汉语意思完成句子不要到处乱扔垃圾。&Don’t&& throw&& away& garbage everywhere.3. We all need a healthy environment , but we produce waste every day, and ti is harmful to our environment. 我们都需要一个健康的环境,但我们每天都在制造垃圾,垃圾对我们的环境有害。短语3: be harmful to…对……有害be harmful to…,意为“对……有害”,to是介词,后接名词、代词或动名词,相当于 do harm to 。其反义短语为be good for,意为“对……有好处”。Watching TV too much& is harmful to /does harm to& your eyes.看电视太多对你的眼睛有害。即学即练三根据汉语意思完成句子被污染的水对鱼类有害。Polluted water is& harmful&&&& to&&& fish.4.Recycle means “change things into something else to be reused”.再循环是指“把某些东西变成其他东西来再次使用”。& 短语4:change…into…把……变成……,使……变为……change…into…,意为“把……变成……,使……变为……”,相当于turn…into…。change是动词,意为“改变”。People are& changing& desert& into&& green fields.人们正在把沙漠变成绿地The magician& changed& the pen& into& a book.这个魔术师将这支钢笔变为一本书。即学即练四根据汉语意思完成句子这种新款面包机可以将大米变成可口的面包。The new bread-making machine can& change/turn& rice&& into& delicious bread.&Unit 3学习目标一、掌握前缀、后缀构词法。(重点)二、根据本单元学到的知识和自身的体会写一篇与节约能源、保护环境相关的文章。自主预习& 用所给词的适当形式填空1. Be& careful (care) not to fall off the ladder.2. I received an& unusual (usual) present from my aunt. She gave me a surprise.3. Don’t throw boxes ,bags , and other things away because you can reuse (use) them.4. It is& impossible& (possible) not to make mistakes.课堂导学It was impossible to clean up the whole river in such a short time.在这么短的时间内把整条河清理干净是不可能的。短语1:clean up 弄干净;清理clean up是固定短语,意为“弄干净;清理”。clean up是“动词+副词”结构的短语,后接代词作宾语时,代词须放clean 在up与之间。Lucy , you put your school things everywhere . Please& clean them up .露西,你到处乱放学习用品。请把它们收拾干净。即学即练 单项选择Your bedroom is too dirty . Please&&& A& .A. clean it up&&B. clean up it C. clean-up it &&D. have clean解析:句意为“你的卧室太脏了。请你把它打扫干净”。Clean up意为“弄干净;清理”,后接代词作宾语时,代词须放在clean与up之间。所以选A。&语法规律总结构词法一、合成词1.名词+名词volley +ball = volleyball(排球)sun + light =sunlight(阳光)2.动词+名词play + ground =playground(操场)pick + pocket = pickpocket(扒手)3.形容词+名词short + hand = shorthand(速记)loud + speaker = loudspeaker(扬声器)4.介词+名词 over + coat = overcoat (大衣)after + noon =afternoon(午后)5.副词+名词out + side = outside(外面)down + stairs = downstairs (楼下)6.动名词+名词waiting + room = waiting-room(等候室)sleeping + pill = sleeping-pill(安眠药)二、派生词1.动词→名词(加-or /- er /-ing /-ess / -tion)visit(参观) →visitor(参观者)read(读) →reader(读者)build(建造) →building(建筑物)host(主持) →hostess(女主持人)educate(教育) →education(教育)2.名词→形容词(加-ful /-less /-en /-ly /-ous /-y)hope(希望) →hopeful(充满希望的)home(家) →homeless(无家可归的)gold(金子) →golden(金色的)danger(危险) →dangerous(危险的)wind(风) →windy(有风的)三、转化1.动词→名词rest(休息) →rest(休息时间)run(跑) →run(奔跑)2.名词→动词boat(船) →boat(划船)cook(厨师) →cook(烹调)& 3.形容词→动词slow(缓慢的) →slow(减慢)narrow(狭窄的) →narrow(使变窄用)即学即练所给词的适当形式填空1.&The boy was& homeless (home), so we took him in.2.&There are& friendly& (friend) relations betwe en them.&
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读郑杰的《给教师的一百条新建议》后感&&取舍之间彰显教师艺术听别人提起这本书,《给教师的一百条新建议》,不禁让我想起,苏氏的《给教师的一百条建议》,刚入职的时候就拜读过苏氏的一百条建议,觉得不错,就决定读,郑杰校长的这本《给教师的一百条新建议》个人觉得内容不错,朴实易懂,郑杰校长谦虚,序中所写:"不妨一读此书,这是一本无害的书"。其实本人比较懒,尤其是看书,很挑剔当看到这句话时便下决心看下去。书中提到的东西可谓是苏氏的中国现代版,在教师职业道德的本身,教授知识,自我学习方面都有很多深刻的见解,教师所处的环境学校也做了一些介绍,读时觉得自己也是一位老师怎么就没有做出如此深刻的领悟而惭愧。书中很多章节都写的很好。书中17章提到用自己的语言表述思想,想想这个事情比较简单,但是要如何用自己的语言使表述的思想让人明白,就是一件很难的事情,尤其是让学生深刻的明白,理解其实是一种思想一种文化,只有走进学生的心中才能真正意义上的理解。提到的学校礼仪,让我想起我们每个星期一的升旗仪式,看到学生整齐有序的排列才广场上也就产生了,对祖国的热爱,学生们标准的站姿也就影响到彼此,这就是仪式所带来的魅力。其中一条顺乎人性最美,一看到这句话我心就澎湃起来了,何为顺乎人性,我们在课堂上的教学如否顺乎人性,我们的导入、探究、讲解、巩固环节是否顺乎人性,我们的评价巩固环节是否顺乎人性,郑杰老师在书中做了讲解,让我感受颇深,真正意识到教学顺乎人性才是最美的。理解学生的苦衷,各行各业都有苦衷,现在学生比我们那时候苦的多。家长把所有希望都寄托在孩子身上,望子成龙,望女成凤,平时考试都认真把关,也不管孩子到底喜欢不喜欢,就给孩子报上辅导班,现在的孩子想玩也玩不成,平时和小伙伴出去一起玩玩成了奢侈的事情。限制太多我们成年人都受不了何况小孩呢呢?当学生遭遇失败和挫折时,有多少人能体谅他们呢?我们即使能体谅在平时又有多少人愿意去去关心呢?书中提到:体谅不体谅学生,是一个讲不讲人道的问题,是一个教师职业道德问题,同时也是一个教育观念问题,也可以是一个教育方法问题。自我反思,学生出现的困难怎么处理,面对学生无助,知识不会一遍一遍做题无果。课堂上偶尔的走神和疲累?对于那些做不完作业的孩子是不是可以想其它有助于孩子完成的方法?我们应该理解孩子无助时的默默的反抗,试着走进孩子的内心,感受他们的心灵,用一颗宽容的心去包容他们有时过于偏激的言行,只有这样才能赢得学生的信任和尊重。只有理解并体谅学生的苦衷,才能真正体现教师对学生生命成长的关爱,才能真正站在学生的角度重新审视教育教教学,也才能达到更好的教育教学效果。《给教师的一百条新建议》这本书像当今教师的写照,书中流露出对教育事业的热爱、真诚、理解、与包容等。书中可以感受到善意,真诚,富有生命的灵气,值得细细的体会和品味,我们在品读时,取舍之间彰显教师艺术,使我们真正理解老师这个职业所取所舍,使老师这个职业得到诠释。&
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