Unit2Amazingnumbers主題范疇：人與社會(huì)主題群：歷史、社會(huì)與文化；科學(xué)與技術(shù)子主題：對(duì)世界、國(guó)家、人民和社會(huì)進(jìn)步有突出貢獻(xiàn)的人物；科學(xué)技術(shù)與工程，人類發(fā)明與創(chuàng)新KeyquestionWhatistheroleofnumbersinourdailylives?masterthemeaningsandusagesofsomekeywords;extractthekeyinformationonthedevelopmentofnumbersfromthetext；understandthecultureofnumbersandexperienceculturaldiversity.Learningobjectives學(xué)習(xí)目標(biāo)Attheendoftheclass,I’llbeableto:countsystemsymbolrepresentexactlywritedowninsteadof/ka?nt/v.計(jì)算（或清點(diǎn)）總數(shù)

/?s?st?m/n.系統(tǒng)

/?s?mbl/n.符號(hào)；記號(hào)

/?repr??zent/v.代表

/?ɡ?z?ktli/adv.準(zhǔn)確地；確切地

寫下；記下代替；作為······的替換NewwordsandphrasesWarmingupHowmanykindsofnumberformsdoyouknow?Andhowdidnumbersdevelop?Numbersareeverywheretoday.Howdidpeopleinancienttimesrecordnumbers?Lead-inSection4

ExtendinganddevelopingcompetenciesPre-readingWhatdoyouthinkthepassagewilltalkabout?Whichancientcountry’snumbersystemmaybementioned?LookatthetitleandthepictureWhile-readingReadthearticleaftertherecording.不同文化背景的人使用不同的數(shù)字。下面是數(shù)字1到5的三種寫法。中國(guó)數(shù)字：一、二、三、四、五羅馬數(shù)字：I、II、III、IV、V阿拉伯?dāng)?shù)字:1、2、3、4、5SkimmingWhat’sthemainideaofthepassage?A.Howpeoplecountanimalsinancienttimes.B.Thedevelopmenthistoryofnumbersystems.C.ThedifferencebetweenRomannumeralsandArabicnumerals.D.Whytallysticksarenotusedtoday.?ScanningReadandmatch.Time/RegionNumberSystemAncienttimesAncientIndiaAncientRometallysticks,drawonestickforeachthingabstractsymbols,noreal-lifeshapesRomannumerals,useletterslike“XII”HowdidIndiannumeralsbecomeArabicnumeralsandspread?Findthekeyinformationinthetext.DiscussionCompareRomannumeralsandArabicnumerals.Whataretheiradvantagesordisadvantages?XIIvs12AncientRomannumeralswerewritteninacomplexway.Arabicnumeralsaremoresimple.Post-readingInmodernlife,dowestillneedtraditionalnumbersystemslikeRomannumerals?Whyorwhynot?WhileRomannumeralshavecultural,historical,andaestheticvaluethatjustifiestheirpreservationincertaincontexts,theyarenotnecessaryforthepractical,day-to-dayfunctioningofmodernsociety.However,theystillholdimportanceinpreservingourculturalheritageandprovidingeducationalandaestheticdiversity.PracticeInancienttimes,peopledevelopedacountingsystemcalled(1)__________.Later,peoplereplacedthissystemwithabstract(2)________.Theseweremoreconvenientbecausetheywerequickertowrite.Thenumbersweusetodayarecalled(3)_____________.Theywereinventedin(4)_____.Thankstothe(5)______,thissystemspreadtootherpartsoftheworld.Sometimeswealsoseenumberswrittenwith(6)________________________onclockfacesandbuildings.ThesearecalledRomannumerals.tallystickssymbolsArabicnumeralsIndiaArabslettersfromRomanalphabetCompletethesummarybelowwiththeinformationfromthearticleonpage30.Completethesentenceswiththewordsbelow.Changetheformifnecessary.(1)TheRomansymbolIV_________thenumber4inArabicnumerals.(2)Thispalacewasa(n)_________oftheking’swealthandpower.(3)TheRomanalphabetisnottheonlywriting_________intheworld—therearemanyothers.(4)Wedon’tknow_________howmanyanimalspeciesthereareonEarth.representssymbolsystemexactlyWhatinfluencesdidthedevelopmentofcountingmethodshaveonpeoplesdailylives?短語(yǔ)收藏夾在古代發(fā)展不同的計(jì)數(shù)方法代表花很長(zhǎng)時(shí)間去做……代替；而不是幾個(gè)世紀(jì)以來(lái)幸虧……；多虧……傳播到…被稱為……阿拉伯?dāng)?shù)字曾經(jīng)是……最常見的做法不如……inancienttimesdevelopdifferentcountingmethodsstandfortakealongtimetodo...insteadofoverthecenturiesthanksto...spreadto...beknownas...Arabicnumeralsusedtobe...themostcommonwayofdoing...notas...as...1.Each“stick”(orpebble,orothercountingtool)standsforathingwewanttocount...①

standfor代表

②count計(jì)算

拓展：countup共計(jì)

Languagepoints完成句子：在中國(guó)，它們代表著幸福和好運(yùn)。They____________happinessandgoodluckinChina.比利還不會(huì)數(shù)數(shù)。Billycan’t________yet.standforcount2.Nowadays,theyareknownasArabicnumerals.beknownas被稱為……拓展：

beknownfor;befamousfor;befamousfor

beknownas含義：意為“被稱為；作為……而出名”，側(cè)重表示某人或某物以某種身份、角色或稱號(hào)而被大家所熟知。例句：MoYanisknownasagreatwriter.（莫言作為一位偉大的作家而聞名。強(qiáng)調(diào)他是以作家這個(gè)身份被大家熟知）用法說(shuō)明：后接表示身份、職業(yè)、稱號(hào)等的名詞，表明主語(yǔ)被人們認(rèn)可的特定身份。beknownfor含義：意思是“因……而聞名”，突出某人或某物因?yàn)榫哂心撤N特點(diǎn)、特長(zhǎng)、成就或事物本身所具備的某種性質(zhì)等而被人們知曉。例句：Franceisknownforitsfinewinesanddeliciouscuisine.（法國(guó)因其優(yōu)質(zhì)的葡萄酒和美味的菜肴而聞名。強(qiáng)調(diào)法國(guó)聞名是因?yàn)槠咸丫坪筒穗冗@些特點(diǎn)）用法說(shuō)明：后接表示特點(diǎn)、特長(zhǎng)、成就等的名詞或動(dòng)名詞，說(shuō)明使主語(yǔ)出名的原因。befamousfor含義：與“beknownfor”意思相近，也是“因……而著名”，同樣強(qiáng)調(diào)因?yàn)槟撤矫娴奶攸c(diǎn)、優(yōu)勢(shì)、成就等讓某人或某物廣為人知。例句：Thecityisfamousforitsbeautifulbeaches.（這座城市因其美麗的海灘而聞名。突出城市聞名是因?yàn)楹┻@一特點(diǎn)

）用法說(shuō)明：后面通常接名詞、動(dòng)名詞等，闡述使主語(yǔ)出名的具體事物或方面。befamousas含義：意為“作為……而著名”，主要強(qiáng)調(diào)某人或某物以特定的身份、職業(yè)、角色等在某個(gè)領(lǐng)域或范圍內(nèi)出名。與“beknownas”用法較為相似，但“befamousas”所表達(dá)的“著名”程度通常更高，更強(qiáng)調(diào)廣為人知的程度。例句：LangLangisfamousasapianist.（郎朗作為一名鋼琴家而聞名。強(qiáng)調(diào)郎朗以鋼琴家的身份被眾人熟知，且名氣較大

）用法說(shuō)明：后接表示身份、職業(yè)、稱號(hào)等的名詞，表明主語(yǔ)在某個(gè)領(lǐng)域以特定身份而享有盛譽(yù)。完成句子：愛(ài)迪生被稱為偉大的發(fā)明家。Edison________________________agreatinventor.這個(gè)小鎮(zhèn)因古老的城堡而聞名。Thistown______________________itsancientcastles.isknownas/isfamousasisknownfor/isfamousforTranslate①她喝了水，而不是果汁。②他看書，而不是看電視。3.Insteadofusingtallysticks,p