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九窩保養(yǎng)--免疫力復(fù)蘇英語作文howtomakefriends英語作文howtomakefriends

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平面向量數(shù)量積的物理背景及其含義教案平面向量數(shù)量積的物理背景及其含義教案

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4/4平面向量數(shù)量積的物理背景及其含義教案平面向量數(shù)量積的物理背景及其含義一、教學目標1、知識與技能：理解平面向量數(shù)量積的含義及其物理意義；應(yīng)用數(shù)量積的性質(zhì)和運算律進行相關(guān)的判斷和運算。2、過程與方法：通過物理中功的計算方式引入向量數(shù)量積的概念；通過對定義的理解與拓展，得到向量數(shù)量積的性質(zhì)及運算律；應(yīng)用“引”“動”“展”“評”“考”的教學方法對向量數(shù)量積的習題的靈活掌握。3情感、態(tài)度與價值觀：培養(yǎng)學生類比遷移的能力。二、教學重難點 1、重點：向量數(shù)量積德相關(guān)運算2、難點：向量數(shù)量積的性質(zhì)和運算律的綜合應(yīng)用三、教學過程（一）、復(fù)習引入兩個非零向量和，作，則叫做向量和的夾角OBA注意：向量的夾角，兩向量必需共起點。（二）、新課講解1、物理中，一個物體在力的作用下產(chǎn)生位移，則力所做的功w計算，，其中是與的夾角。像這樣功w，由力和位移，和夾角確定的數(shù)量稱為力與的數(shù)量積。2、數(shù)量積的定義已知兩個非零向量與，我們把數(shù)量叫做與的數(shù)量積（或內(nèi)積），記作。其中，為與的夾角。規(guī)定：零向量與任一向量的數(shù)量積為0，注意：向量的數(shù)量積為一個實數(shù)，不是向量。（老師提示，學生完成）3、向量數(shù)量積的性質(zhì)設(shè)與是非零向量

4、投影的概念（1）叫做向量在方向上的投影.（2）數(shù)量積的幾何意義

與的數(shù)量積等于與在方向上投影的積.5、向量數(shù)量積的運算律注意：（注：教師講解，重點強調(diào)易錯點）（三）課堂訓練：（注：學生小組完成，讓學生“動”“展”，教師完成“評”）（教師提示：向量的垂直可以轉(zhuǎn)化為向量的數(shù)量積為零，由學生小組共同完成）（四）、課堂檢測：（提示：由學生獨立完成，限時5分鐘，學生上交檢測題，教師批改）（五）、課堂小結(jié)1.向量的數(shù)量積的定義2.向量數(shù)量積的性質(zhì)3.向量數(shù)量積的運算律

（六）、作業(yè)布置：課本108頁A組第1題四、板書設(shè)計：2.4.1平面向量數(shù)量積的物理背景及其含義

數(shù)量積定義性質(zhì)

運算律

例1

例2

五、課后思考題六、教學反思：我作為高一數(shù)學組的代表,非常榮幸能夠參加這次賽課，通過這次活動,我收獲很多,在教學上進步很多.著名教育家布盧姆說:“教會學生思考,我們就給了他們自己教育自己的能力.”在新課標課程背景下衡量課堂教學效果好壞的一個重要標志就是學生的思維能力在多大程度上得到挖掘和培養(yǎng).下面我將正式上課的主要環(huán)節(jié)做個反思：1、問題情景引入如果一個物體在力F的作用下產(chǎn)生位移s,那么力所做的功是多少?能否把“功”看成是兩個向量的一種運算的結(jié)果呢?為此,我們可以引入“向量數(shù)量積”的概念.但由于高一學生在物理上還沒有學習到力與位移夾角不為零時功的計算公式，所以這里有一定的遺憾。2、對于學生“動”，沒有很好的提高學生的學習興趣，沒有達到讓學生小組學習的目的，學生沒有落實好小組討論3、對于學生的”展”.內(nèi)容把握的不是太好，讓學生展示的內(nèi)容過多，這樣就浪費了其他同學的時間。4、對于教師的“評”，評的過于粗糙，沒有達到提高學生學習的積極性?？傊⑦@堂課整體還算滿意，我收獲很多，也反思到有很多需要改進的方面。

電信光貓設(shè)置常識之(一)電信光貓設(shè)置常識之(一)電信光貓設(shè)置常識之(一)中國電信現(xiàn)在光纖升級會將你原先ADSL的貓、路由等組織架構(gòu)打破，這倒無所謂，關(guān)鍵是其帶來很多惡心的限制這點就很煩人。升級前拓撲結(jié)構(gòu)：升級后的拓撲結(jié)構(gòu)：1、該結(jié)構(gòu)的主要問題（1）電信路由器只給你一個閹割版的簡單用戶密鑰，但我們身邊的情況是：寬帶服務(wù)人員給你連接好上網(wǎng)后什么都不會給你說，而且還會告訴你不要亂動路由里面的設(shè)置；（2）如果你用電信的路由那么你只能使用一臺電腦撥號上網(wǎng)，當家里有其他的電腦時，你就崩潰了！2、兩難境地不看IPTV了，那比較簡單，不用電信的路由，直接用我的路由接FTTH貓；你想保留IPTV的話，那只能忍受電信莫名限制你的連接數(shù)的規(guī)定了。聰明的你肯定會想到，能否在電信路由上插一個自己的路由呢？答案是可以的，但是并不是那么簡單，這也引出了本文的核心內(nèi)容。3、我的解決方案的拓撲結(jié)構(gòu)此刻的電信路由只是一個跳板，上網(wǎng)撥號由我自己的路由器完成，IPTV只能接在電信的盒子上。關(guān)鍵問題來了，直接這么做你的電腦只能連接上你的路由但是無法上INTERNET（當然，連接電信路由也可以，但是我們的目標是將電信送的路由作為一個跳板而已，直接連上電信路由不能上網(wǎng)）。如果將你的電信路由的接入名和密碼作為你自己路由PPPoE登錄名和密碼，也是不行的。所以我們只能將電信路由撥號功能去掉，讓我們自己路由撥號。4、超級管理員重大問題來了，完成電信路由的配置我們必須要得到超級管理員密碼才能修改電信路由的配置，如何得到呢？電信路由的萬能用戶名：telecomadmin密碼：nE7jA%5m（手動輸入不要復(fù)制粘貼）5、電信路由配置?首先先不要連我們的路由器，即在3的圖結(jié)構(gòu)下，連上電信網(wǎng)絡(luò)——寬帶設(shè)置，選擇連接模式：1_INTERNET_R_VID_模式請選擇：BRIDGE橋接類型請選擇：PPPoE_BridgedVLAN模式，我選擇了VLAN穿透DHCP透傳打勾綁定選項，把LAN1,SSID1打勾然后進入DHCP服務(wù)器，把DHCPServer關(guān)掉，同樣點確認最后進入管理——設(shè)備管理——重啟路由，至此電信路由的設(shè)置就完全OK了。6、連接自己的路由按照4的最終樣式連接自己的路由，電信路由的LAN1用網(wǎng)線連接你路由的WLan進線口就行了。電腦連上自己的路由，輸入對應(yīng)的管理地址進入以后，進入WAN口設(shè)置，選擇PPPoE撥號，填上前面問來的新用戶名和密碼，相關(guān)設(shè)置自行設(shè)置。所以我們達到了以下兩個目的：（1）能用自己的路由進行撥號，功能和以前完全一致，沒有任何缺失（2）同時能看IPTV這是效果圖，黑盒=FTTH貓，樹立的白盒=電信華為路由，天線灰盒=我自己的路由，躺著的白盒子=IPTV機頂盒。（通過以上步驟，我們實現(xiàn)的是在關(guān)閉電信光貓的路由功能的情況下，通過自己的路由器撥號上網(wǎng)）

幼兒園防汛防臺風應(yīng)急預(yù)案幼兒園防汛防臺風應(yīng)急預(yù)案

/幼兒園防汛防臺風應(yīng)急預(yù)案金山蒙氏幼兒園防汛防臺風應(yīng)急預(yù)案為認真貫徹“安全第一、預(yù)防為主”的方針，有效地防范和處置臺風引發(fā)的校舍倒塌、校園進水等自然災(zāi)害的發(fā)生，切實保障師生生命、財產(chǎn)安全，特制定本抗擊臺風應(yīng)急處理預(yù)案。一、適用范圍幼兒園發(fā)生以下臺風引發(fā)的重大安全事故的應(yīng)急處理，適用于本預(yù)案。1、幼兒園因臺風襲擊造成校舍倒塌的重大安全事故；2、幼兒園內(nèi)因臺風侵襲造成師生死亡的重大安全事故；3、幼兒園組織校外活動，因臺風侵襲造成師生死亡的重大安全事故；4、社會影響較大、造成嚴重后果的其他重大帶風侵襲造成的安全事故。二、領(lǐng)導小組成員名單組?長：袁華（園長）副組長：郭玉明、梁嬋、車燕清成?員：潘玉玲、顏慧萍、林麗娜、劉曉紅三、分工及職責：組長袁華：全面負責本園臺風應(yīng)景工作，開展自救、互救、疏散知識的宣傳教育，提高本單位教工應(yīng)急意識和抵御臺風災(zāi)害的能力。副組長郭可明：對本園臺風防災(zāi)應(yīng)急預(yù)案組織演練，臺風前落實上級部門的師生停課制度。副組長梁嬋、車燕清：一旦發(fā)生臺風，全面負責本園臺風應(yīng)急工作，指揮各專業(yè)組按預(yù)案確定的職責投入抗臺風救災(zāi)。三、專業(yè)組成員及職責◆應(yīng)急應(yīng)急疏散組：各班班主任，職責：一旦發(fā)生臺災(zāi)事故，迅速疏散在校舍人群?！翎t(yī)療救護組：江堅、梁亞森，職責：一旦發(fā)生臺風災(zāi)害事故，有人員受傷，立即展開救護?！艉笄诒Ｕ辖M：陳潔芳、周水英，職責：當臺風災(zāi)害發(fā)生后，協(xié)助領(lǐng)導小組成員，做好各項準備工作◆宣傳組：鐘繼嬌，職責：利用板報、廣播等形式宣傳有防臺風的知識及預(yù)防措施?！艟C合協(xié)調(diào)組：林麗娜、劉曉紅，職責：一旦發(fā)生臺風災(zāi)，迅速逐級上報，并協(xié)助領(lǐng)導協(xié)調(diào)各方面的工作。四、重大事故報告程序、要求及現(xiàn)場保護（一）報告程序及要求：1、重大臺災(zāi)事故發(fā)生后，幼兒園綜合協(xié)調(diào)組成員立即撥打110、119、120救援電話的同時，必須立即報告教育辦辦公室和管理處。2、事故發(fā)生后6小時內(nèi)將事故簡要情況書面上報上述部門。3、臺災(zāi)事故報告內(nèi)容：臺災(zāi)發(fā)生的時間、地點、人員傷亡情況（包括姓名、年齡、性別、身份）、財產(chǎn)損失情況、事故簡要經(jīng)過、事故發(fā)生原因的初步判斷、事故發(fā)生后采取的措施和事故現(xiàn)場控制情況以及事故報告單位和報告人。4、事故補報：由于臺災(zāi)事故現(xiàn)場情況發(fā)生變化，傷亡人員數(shù)量發(fā)生變化時，幼兒園及時進行補報。（二）事故現(xiàn)場保護重大臺災(zāi)事故發(fā)生后，幼兒園綜合協(xié)調(diào)組成員對事故現(xiàn)場實行嚴格的保護，防止與重大臺災(zāi)事故有關(guān)的殘骸、物品、文件等被隨意挪動或丟失，因搶救人員、防止事故擴大以及疏通交通等原因需要移動現(xiàn)場物件的，后勤保障組成員做出標志或繪制現(xiàn)場簡圖并寫出書面記錄、妥善保存臺災(zāi)現(xiàn)場重要痕跡、物證。五、重大事故現(xiàn)場處置重大臺災(zāi)事故現(xiàn)場處置的具體程序如下：（一）成立現(xiàn)場指揮部現(xiàn)場指揮部由領(lǐng)導小組和應(yīng)急工作組組成，負責具體的施救和各項善后處理工作，現(xiàn)場指揮部的職責是在領(lǐng)導小組的統(tǒng)一指揮下，具體負責組織臺災(zāi)事故搶救、現(xiàn)場保護、傷員搶救和事故善后處理工作。（二）迅速開展救治工作現(xiàn)場指揮部根據(jù)臺災(zāi)事故情況迅速開展救援工作。救援目標：1、將全體師生轉(zhuǎn)移到安全地帶；2、在確保人員安全的前提下，對財產(chǎn)采取保護措施；3、對已經(jīng)遭受傷害的師生開展救治；4、為開展后續(xù)救援創(chuàng)造條件。（三）做好情況通報工作幼兒園嚴格做好上情下達、下情上報工作，迅速將災(zāi)情按要求上報，同時及時下達上級指示。?

人教版新課標高中英語選修7課文原文人教版新課標高中英語選修7課文原文

/人教版新課標高中英語選修7課文原文人教版新課標高中英語選修7課文原文Unit1Livingwell-ReadingMARTY’SSTORYHi,mynameisMarryFieldingandIguessyoucouldsaythatIam"oneinamillion".Inotherwords,therearenotmanypeoplelikeme.Yousee,Ihaveamusclediseasewhichmakesmeveryweak,soIcan'trunorclimbstairsasquicklyasotherpeople.Inaddition,sometimesIamveryclumsyanddropthingsorbumpintofurniture.Unfortunately,thedoctorsdon'tknowhowtomakemebetter,butIamveryoutgoingandhavelearnedtoadapttomydisability.Mymottois:liveOnedayatatime.UntilIwastenyearsoldIwasthesameaseveryoneelse.Iusedtoclimbtrees,swimandplayfootball.Infact,IusedtodreamaboutplayingprofessionalfootballandpossiblyrepresentingmycountryintheWorldCup.ThenIstartedtogetweakerandweaker,untilIcouldonlyenjoyfootballfromabenchatthestadium.IntheendIwentintohospitalformedicaltests.Istayedtherefornearlythreemonths.IthinkIhadatleastabilliontests,includingoneinwhichtheycutoutapieceofmusclefrommylegandlookedatitunderamicroscope.Evenafterallthat,noonecouldgivemydiseaseanameanditisdifficulttoknowwhatthefutureholds.OneproblemisthatIdon'tlookanydifferentfromotherpeople.Sosometimessomechildreninmyprimaryschoolwouldlaugh,whenIgotoutofbreathafterrunningashortwayorhadtostopandresthalfwayupthestairs.Sometimes,too,Iwastooweaktogotoschoolsomyeducationsuffered.EverytimeIreturnedafteranabsence,IfeltstupidbecauseIwasbehindtheothers.Mylifeisaloteasierathighschoolbecausemyfellowstudentshaveacceptedme.Thefewwhocannotseetherealpersoninsidemybodydonotmakemeannoyed,andIjustignorethem.AllinallIhaveagoodlife.IamhappytohavefoundmanythingsIcando,likewritingandcomputerprogramming.MyambitionistoworkforafirmthatdevelopscomputersoftwarewhenIgrowup.Lastyearinventedacomputerfootballgameandabigcompanyhasdecidedtobuyitfromme.Ihaveaverybusylifewithnotimetositaroundfeelingsorryformyself.Aswellasgoingtothemoviesandfootballmatcheswithmyfriends,Ispendalotoftimewithmypets.Ihavetworabbits,aparrot,atankfulloffishandatortoise.TolookaftermypetsproperlytakesalotoftimebutIfinditworthwhile.Ialsohavetodoalotofwork,especiallyifIhavebeenawayforawhile.Inmanywaysmydisabilityhashelpedmegrowstrongerpsychologicallyandbecomemoreindependent.Ihavetoworkhardtoliveanormallifebutithasbeenworthit.IfIhadachancetosayonethingtohealthychildren,itwouldbethis:havingadisabilitydoesnotmeanyourlifeisnotsatisfying.Sodon'tfeelsorryforthedisabledormakefunofthem,anddon'tignorethemeither.Justacceptthemforwhotheyare,andgivethemencouragementtoliveasrichandfullalifeasyoudo.Thankyouforreadingmystory.ALETTERTOANARCHITECTLookatthepictures.Discusstheproblemsthatpeoplewithwalkingdifficultiesmighthaveinacinema.MsLSandersAliceMajorChiefarchitect64CambridgeStreetCinemaDesignsBankstown44HillStreetBankstown24September,200__DearMsSanders,IreadinthenewspapertodaythatyouaretobethearchitectforthenewBankstowncinema.Ihopeyouwillnotmindmewritingtoaskifyouhavethoughtabouttheneedsofdisabledcustomers.InparticularIwonderifyouhaveconsideredthefollowingthings:1Adequateaccessforwheelchairs.Itwouldbehandytohaveliftstoallpartsofthecinema.Thebuttonsintheliftsshouldbeeasyforapersoninawheelchairtoreach,andthedoorsbewideenoughtoenter.Insomecinemas,theliftsareatthebackofthecinemaincold,unattractiveplaces.Asdisabledpeoplehavetousethelifts,thismakesthemfeeltheyarenotasimportantasothercustomers.2Earphonesforpeoplewhohavetroublehearing.Itwouldhelptofitsetsofearphonestoallseats,notjusttosomeofthem.Thiswouldallowhearing-impairedcustomerstoenjoythecompanyoftheirhearingfriendsratherthanhavingtositinaspecialarea.3Raisedseating.Peoplewhoareshortcannotalwaysseethescreen.SoI'dliketosuggestthattheseatsatthebackbeplacedhigherthanthoseatthefrontsothateveryonecanseethescreeneasily.Perhapstherecouldbeaspaceattheendofeachrowforpeopleinwheelchairstositnexttotheirfriends.4Toilets.Fordisabledcustomersitwouldbemoreconvenienttoplacethetoiletsneartheentrancetothecinema.Itcanbedifficultiftheonlydisabledtoiletisinthebasementalongwayfromwherethefilmisshowing.Andifthedoorscouldbeopenedoutwards,disabledcustomerswouldbeveryhappy.5Carparking.Ofcourse,thereareusuallyspacesspeciallyreservedfordisabledandelderlydrivers.Iftheyareclosetothecinemaentranceand/orexit,itiseasierfordisabledpeopletogettofilmincomfort.Thankyouforreadingmyletter.Ihopemysuggestionswillmeetwithyourapproval.Disabledpeopleshouldhavethesameopportunitiesasable-bodiedpeopletoenjoythecinemaandtodosowithdignity.Iamsuremanypeoplewillpraiseyourcinemaifyoudesignitwithgoodaccessfordisabledpeople.Itwillalsomakethecinemaownershappyifmorepeoplegoastheywillmakehigherprofits!Yourssincerely,AliceMajorUnit2Robots-ReadingSATISFACTIONGURANTEEDLarryBelmontworkedforacompanythatmaderobots.Recentlyithadbegunexperimentingwithahouseholdrobot.ItwasgoingtobetestedoutbyLarry'swife,Claire.Clairedidn'twanttherobotinherhouse,especiallyasherhusbandwouldbeabsentforthreeweeks,butLarrypersuadedherthattherobotwouldn'tharmherorallowhertobeharmed.Itwouldbeabonus.However,whenshefirstsawtherobot,shefeltalarmed.HisnamewasTonyandheseemedmorelikeahumanthanamachine.Hewastallandhandsomewithsmoothhairandadeepvoicealthoughhisfacialexpressionneverchanged.OnthesecondmorningTony,wearinganapron,broughtherbreakfastandthenaskedherwhethersheneededhelpdressing.Shefeltembarrassedandquicklytoldhimtogo.Itwasdisturbingandfrighteningthathelookedsohuman.Oneday,Clairementionedthatshedidn'tthinkshewasclever.Tonysaidthatshemustfeelveryunhappytosaythat.Clairethoughtitwasridiculoustobeofferedsympathybyarobot.Butshebegantotrusthim.Shetoldhimhowshewasoverweightandthismadeherfeelunhappy.Alsoshefeltherhomewasn'telegantenoughforsomeonelikeLarrywhowantedtoimprovehissocialposition.Shewasn'tlikeGladysClaffern,oneoftherichestandmostpowerfulwomenaround.AsafavourTonypromisedtohelpClairemakeherselfsmarterandherhomemoreelegant.SoClaireborrowedapileofbooksfromthelibraryforhimtoread,orrather,scan.Shelookedathisfingerswithwonderastheyturnedeachpageandsuddenlyreachedforhishand.Shewasamazedbyhisfingernailsandthesoftnessandwarmthofhisskin.Howabsurd,shethought.Hewasjustamachine.TonygaveClaireanewhaircutandchangedthemakeupshewore.Ashewasnotallowedtoaccompanyhertotheshops,hewroteoutalistofitemsforher.Clairewentintothecityandboughtcurtains,cushions,acarpetandbedding.Thenshewentintoajewelleryshoptobuyanecklace.Whentheclerkatthecounterwasrudetoher,sherangTonyupandtoldtheclerktospeaktohim.Theclerkimmediatelychangedhisattitude.ClairethankedTony,tellinghimthathewasa"dear".Assheturnedaround,therestoodGladysClaffern.Howawfultobediscoveredbyher,Clairethought.Bytheamusedandsurprisedlookonherface,ClaireknewthatGladysthoughtshewashavinganaffair.Afterall,sheknewClaire'shusband'snamewasLarry,notTony.WhenClairegothome,sheweptwithangerinherarmchair.GladyswaseverythingClairewantedtobe."Youcanbelikeher,"TonytoldherandsuggestedthatsheinviteGladysandherfriendstothehousethenightbeforehewastoleaveandLarrywastoreturn.Bythattime,Tonyexpectedthehousetobecompletelytransformed.Tonyworkedsteadilyontheimprovements.Clairetriedtohelponcebutwastooclumsy.ShefelloffaladderandeventhoughTonywasinthenextroom,hemanagedtocatchherintime.Heheldherfirmlyinhisarmsandshefeltthewarmthofhisbody.Shescreamed,pushedhimawayandrantoherroomfortherestoftheday.Thenightofthepartyarrived.Theclockstruckeight.TheguestswouldbearrivingsoonandClairetoldTonytogointoanotherroom.Atthatmoment,Tonyfoldedhisarmsaroundher,bendinghisfaceclosetohers.Shecriedout"Tony"andthenheardhimdeclarethathedidn'twanttoleaveherthenextdayandthathefeltmorethanjustthedesiretopleaseher.Thenthefrontdoorbellrang.Tonyfreedheranddisappearedfromsight.ItwasthenthatClairerealizedthatTonyhadopenedthecurtainsofthefrontwindow.Herguestshadseeneverything!ThewomenwereimpressedbyClaire,thehouseandthedeliciouscuisine.Justbeforetheyleft,ClaireheardGladyswhisperingtoanotherwomanthatshehadneverseenanyonesohandsomeasTony.Whatasweetvictorytobeenviedbythosewomen!Shemightnotbeasbeautifulasthem,butnoneofthemhadsuchahandsomelover.Thensheremembered-Tonywasjustamachine.Sheshouted"Leavemealone"andrantoherbed.Shecriedallnight.ThenextmorningacardroveupandtookTonyaway.ThecompanywasverypleasedwithTony'sreportonhisthreeweekswithClaire.Tonyhadprotectedahumanbeingfromharm.HehadpreventedClairefromharmingherselfthroughherownsenseoffailure.HehadopenedthecurtainsthatnightsothattheotherwomenwouldseehimandClaire,knowingthattherewasnorisktoClaire'smarriage.ButeventhoughTonyhadbeensoclever,hewouldhavetoberebuilt-youcannothavewomenfailinginlovewithmachines.ABIOGRAPHYOFISAACASIMOVIsaacAsimovwasanAmericanscientistandwriterwhowrotearound480booksthatincludedmysterystories,scienceandhistorybooks,andevenbooksabouttheHolyBibleandShakespeare.Butheisbestknownforhissciencefictionstories.Asimovhadbothanextraordinaryimaginationthatgavehimtheabilitytoexplorefutureworldsandanamazingmindwithwhichhesearchedforexplanationsofeverything,inthepresentandthepast.Asimov'slifebeganinRussia,wherehewasbornon2January,1920.ItendedinNewYorkon6April,1992,whenhediedasaresultofanHIVinfectionthathehadgotfromabloodtransfusionnineyearsearlier.WhenAsimovwasthree,hemovedwithhisparentsandhisone-year-oldsistertoNewYorkCity.Therehisparentsboughtacandystorewhichtheyranforthenext40orsoyears.Attheageofnine,whenhismotherwaspregnantwithherthirdchild,Asimovstartedworkingpart-timeinthestore.Hehelpedoutthroughhisschoolanduniversityyearsuntil1942,ayearafterhehadgainedamaster'sdegreeinchemistry.In1942hejoinedthestaffofthePhiladelphiaNavyYardasajuniorchemistandworkedthereforthreeyears.In1948hegothisPhDinchemistry.ThenextyearhebecameabiochemistryteacheratBostonUniversitySchoolofMedicine.In1958hegaveupteachingtobecomeafull-timewriter.ItwaswhenAsimovwaselevenyearsoldthathistalentforwritingbecameobvious.Hehadtoldafriendtwochaptersofastoryhehadwritten.Thefriendthoughthewasretellingastoryfromabook.ThisreallysurprisedAsimovandfromthatmoment,hestartedtotakehimselfseriouslyasawriter.Asimovbeganhavingstoriespublishedinsciencefictionmagazinesin1939.In1950hepublishedhisfirstnovelandin1953hisfirstsciencebook.Throughouthislife,Asimovreceivedmanyawards,bothforhissciencefictionbooksandhissciencebooks.Amonghismostfamousworksofsciencefiction,oneforwhichhewonanawardwastheFoundationtrilogy(1951-1953),threenovelsaboutthedeathandrebirthofagreatempireinagalaxyofthefuture.ItwaslooselybasedonthefalloftheRomanEmpirebutwasaboutthefuture.ThesebooksarefamousbecauseAsimovinventedatheoreticalframeworkwhichwasdesignedtoshowhowideasandthinkingmaydevelopinthefuture.Heisalsowellknownforhiscollectionofshortstories,I,Robot(1950),inwhichhedevelopedasetofthree"laws"forrobots.Forexample,thefirstlawstatesthatarobotmustnotinjurehumanbeingsorallowthemtobeinjured.Someofhisideasaboutrobotslaterinfluencedotherwritersandevenscientistsresearchingintoartificialintelligence.Asimovwasmarriedtwice.Hemarriedhisfirstwifein1942andhadasonandadaughter.Theirmarriagelasted31years.Soonafterhisdivorcein1973,Asimovmarriedagainbuthehadnochildrenwithhissecondwife.Unit3Underthesea-ReadingOLDTOMTHEKILLERWHALEIwas16whenIbeganworkinJune1902atthewhalingstation.Ihadheardofthekillersthateveryyearhelpedwhalerscatchhugewhales.Ithought,atthetime,thatthiswasjustastorybutthenIwitnesseditwithmyowneyesmanytimes.OntheafternoonIarrivedatthestation,asIwasIsortingoutmy'accommodation,Iheardaloudnoisecomingfromthebay.Werandowntotheshoreintimetoseeanenormousanimaloppositeusthrowingitselfoutofthewaterandthencrashingdownagain.Itwasblackandwhiteandfish-shaped.ButIknewitwasn'tafish."That'sOldTom,thekiller,"oneofthewhalers,George,calledouttome."He'stellingusthere'sawhaleoutthereforus."Anotherwhaleryelledout,"Rush-oo...rush-oo."Thiswasthecallthatannouncedtherewasabouttobeawhalehunt."Comeon,Clancy.Totheboat,"Georgesaidasheranaheadofme.IhadalreadyheardthatGeorgedidn'tlikebeingkeptwaiting,soeventhoughIdidn'thavetherightclotheson,Iracedafterhim.Withoutpausingwejumpedintotheboatwiththeotherwhalersandheadedoutintothebay.IlookeddownintothewaterandcouldseeOldTomswimmingbytheboat,showingustheway.Afewminuteslater,therewasnoTom,soGeorgestartedbeatingthewaterwithhisoarandtherewasTom,circlingbacktotheboat,leadingustothehuntagain.Usingatelescopewecouldseethatsomethingwashappening.Aswedrewcloser,Icouldseeawhalebeingattackedbyapackofaboutsixotherkillers."What'retheydoing?"IaskedGeorge."Well,it'steamwork-thekillersovertherearethrowingthemselvesontopofthewhale'sblow-holetostopitbreathing.Andthoseothersarestoppingitdivingorfleeingouttosea,"Georgetoldme,pointingtowardsthehunt.Andjustatthatmoment,themostextraordinarythinghappened.Thekillersstartedracingbetweenourboatandthewhalejustlikeapackofexciteddogs.Thentheharpoonwasreadyandthemaninthebowoftheboataimeditatthewhale.Heletitgoandtheharpoonhitthespot.Beingbadlywounded,thewhalesoondied.Withinamomentortwo,itsbodywasdraggedswiftlybythekillersdownintothedepthsofthesea.Themenstartedturningtheboataroundtogohome."What'shappened?"Iasked."Havewelostthewhale?""Ohno,"Jackreplied."We'llreturntomorrowtobringinthebody.Itwon'tfloatuptothesurfaceforaround24hours.""Inthemeantime,OldTom,andtheothersarehavingagoodfeedonitslipsandtongue,"addedRed,laughing.AlthoughOldTomandtheotherkillerswerefiercehunters,they,neverharmedorattackedpeople.Infact,theyprotectedthem.TherewasonedaywhenwewereoutinthebayduringahuntandJameswaswashedofftheboat."Manoverboard!Turntheboataround!"urgedGeorge,shoutingloudly.Theseawasroughthatdayanditwasdifficulttohandletheboat.ThewaveswerecarryingJamesfurtherandfurtherawayfromus.FromJames'sface,Icouldseehewasterrifiedofbeingabandonedbyus.ThensuddenlyIsawashark."Look,there'sasharkoutthere,"Iscreamed."Don'tworry,OldTomwon'tletitnear,"Redreplied.IttookoverhalfanhourtogettheboatbacktoJames,andwhenweapproachedhim,IsawJamesbeingfirmlyheldupinthewaterbyOldTom.Icouldn'tbelievemyeyes.Therewereshoutsof"Welldone,OldTom"and'ThankGod"aswepulledJamesbackintotheboat.AndthenOldTomwasoffandbacktothehuntwheretheotherkillerswerestillattackingthewhale.ANEWDIMENSIONOFLIFE19thJanuaryI'msittinginthewarmnightairwithacolddrinkinmyhandandreflectingontheday–adayofpuremagic!IwentsnorkellingonthereefoffshorethismorninganditwasthemostfantasticthingIhaveeverdone.Seeingsuchextraordinarybeauty,Ithinkeverycellinmybodywokeup.Itwaslikediscoveringawholenewdimensionoflife.ThefirstthingIbecameawareofwasallthevividcolourssurroundingme-purples,reds,oranges,yellows,bluesandgreens.Thecoralswerefantastic-theywereshapedlikefans,plates,brains,lace,mushrooms,thebranchesoftreesandthehornsofdeer.Andallkindsofsmall,neatandelegantfishwereswimminginandaroundthecorals.Thefishdidn'tseemtomindmeswimmingamongthem.Iespeciallylovedthelittleorangeandwhitefishthathidinthewavinglongthinseaweed.AndIalsolovedthesmallfishthatcleanthebodiesoflargerfish-Ievensawthemgetinsidetheirmouthsandcleantheirteeth!ItseemedtherewasasurprisewaitingformearoundeverycornerasIexploredsmallcaves,shelvesandnarrowpassageswithmyunderwaterflashlight:theyellowandgreenparrotfishwashangingupsidedown,andsuckingtinyplantsoffthecoralwithitshardbird-likemouth;ayellow-spottedredsea-slugwasslidingbyabluesea-star;alargewise-lookingturtlewaspassingsoclosetomethatIcouldhavetouchedit.TherewereothercreaturesthatIdidn'twanttogettoocloseto-aneelwithitsstrongsharpteeth,withonlyitsheadshowingfromahole,watchingforatastyfish(ormytastytoe!);andthegiantclamhaltburiedinsomecoralwaitingforsomethingtoswiminbetweenitsthickgreenlips.Thenthereweretwogreyreefsharks,eachaboutoneandahalfmetreslong,whichsuddenlyappearedfrombehindsomecoral.Itoldmyselftheyweren'tdangerousbutthatdidn'tstopmefromfeelingscaredtodeathforamoment!Thewaterwasquiteshallowbutwherethereefended,therewasasteepdroptothesandyoceanfloor.ItmarkedaboundaryandIthoughtIwasverybravewhenIswamovertheedgeofthereefandhungtherelookingdownintothedepthsoftheocean.Myheartwasbeatingwildly-Ifeltveryexposedinsuchdeepclearwater.Whatawonderful,limitlessworlditwasdownthere!AndwhatatinyspotIwasinthisenormousworld!Unit4Sharing-ReadingALETTERHOMEDearRosemary,Thanksforyourletter,whichtookafortnighttoarrive.Itwaswonderfultohearfromyou.Iknowyou'redyingtohearallaboutmylifehere,soI'veincludedsomephotoswhichwillhelpyoupicturetheplacesItalkabout.Youaskedaboutmyhighschool.Well,it'sabushschool–theclassroomsaremadeofbambooandtheroofsofgrass.Ittakesmeonlyafewminutestowalktoschooldownamuddytrack.WhenIreachtheschoolgroundstherearelotsof"goodmornings"formefromtheboys.Manyofthemhavewalkedalongway,sometimesuptotwohours,togettoschool.There'snoelectricityorwaterandevennotextbookseither!l'mstilltryingtoadapttotheseconditions.However,onethingisforsure,I'vebecomemoreimaginativeinmyteaching.Scienceismymostchallengingsubjectasmystudentshavenoconceptofdoingexperiments.Infactthereisnoequipment,andifIneedwaterIhavetocarryitfrommyhouseinabucket!TheotherdayIwasshowingtheboystheweeklychemistryexperimentwhen,beforeIknewit,themixturewasbubblingovereverywhere!Theboyswhohadnevercomeacrossanythinglikethisbeforestartedjumpingoutofthewindows.SometimesIwonderhowrelevantchemistryistothesestudents,mostofwhomwillbegoingbacktotheirvillagesafterYear8anyway.Tobehonest,IdoubtwhetherI'mmakinganydifferencetotheseboys'livesatall.YouaskedwhetherI'mgettingtoknowanylocalpeople.Well,that'sactuallyquitedifficultasIdon'tspeakmuchofthelocalEnglishdialectyet.Butlastweekendanotherteacher,Jenny,and1didvisitavillagewhichisthehomeofoneoftheboys,Tombe.Itwasmyfirstvisittoaremotevillage.Wewalkedfortwoandahalfhourstogetthere-fir