【正文】 科學(xué)家的腦海里產(chǎn)生的問題是：“這是不是所有克隆動物的一個主要困難呢？這種現(xiàn)象會不會永遠發(fā)生？如果改進程序，問題會不會解決？另一方面，多莉的出生引起了一陣強烈的反對，對，對媒體和公眾的想象力也產(chǎn)生了巨大的影響。多莉總共只存活了六年半，這是它的原型羊壽命的一半。接著傳來了多莉病重的壞消息。一方面，整個科學(xué)界都在關(guān)注著首例成功的克隆動物多莉羊的成長168。8．把胚胎植入另外一頭母羊(C)體內(nèi)，母羊(C)就是克隆羊的代孕者。6．用電把母羊(B)的軀干細胞核和母羊(A)的卵細胞結(jié)合起來。該細胞核應(yīng)包含生產(chǎn)一頭新羊所需要的全部基因。3．卵細胞準備接受新的細胞核。它的程序如下圖所示：1．母羊(A)提供一個卵細胞?？寺〔溉閯游锏亩啻螄L試都失敗了。第一，園藝師一直用它生產(chǎn)大量的供商用的植物；第二，它在對新植物物種的研究以及對動物的醫(yī)學(xué)研究方面都是很有價值的。實際上，這些都是自然克隆現(xiàn)象。當園藝師從生長著的植物上剪下枝條來培植新植物時，就會產(chǎn)生這種現(xiàn)象。Unit2 克?。核鼘盐覀円蚝畏?？克隆一直與我們同在，而如今它還要持續(xù)下去。未來展望世界各地的人，由于受到氣候條件和生活方式的吸引，仍然在繼續(xù)遷入加利福尼亞。最近期的移民在最近的幾十年里，加利福尼亞成了更多的亞洲人的家，包括朝鮮人、柬埔寨人、越南人和老撾人。非洲人從1 9世紀就在加利福尼亞住下來，他們是從墨西哥向北遷來的。今天，加利福尼亞的猶太人口在美國占第二位。20世紀20年代，電影業(yè)在加州的好萊塢建立了起來。19世紀后期，其他國家的移民，比如意大利人來到了加利福尼亞，他們主要是漁民，也有制酒工人。后來的移民雖然中國移民在淘金熱時期就開始到來了，但是更大批量的移民卻是在1 9世紀60年代為了修建貫穿美國東西海岸的鐵路而來的。一些人死了或回家了，但是盡管條件十分艱苦，多數(shù)人還是留在了加利福尼亞勞作謀生，并在新的城鎮(zhèn)或農(nóng)場里定居下來。隨后跟著來的有歐洲和亞洲的探險家。發(fā)財夢很快就吸引了世界各地的人。今天，住在圣弗朗西斯科（舊金山）及其周邊地區(qū)的美籍俄羅斯人約有25,000人。這就是為什么今天還有40%的加利福尼亞人仍然把西班牙語作為第一或第二語言的緣故。1846年美國向墨西哥宣戰(zhàn)，美國贏得戰(zhàn)爭勝利后，墨西哥被迫把加利福尼亞割讓給美國。在首批移 居加州的西班牙人中，大部分是宗教人士，他們的職責(zé)是向原住民傳授天主教。西班牙人在18世紀的時候，加利福尼亞是由西班牙統(tǒng)治的西班牙士兵最早是在1 6世紀初期來到南美洲的，他們同土著人打仗，并奪去了他們的土地。此外，歐洲人帶來了疾病，使許多人染病而死，不過，還是有一些人在經(jīng)歷了這些恐怖時期后活下來了。科學(xué)家們認為，這些遷居者通過一條史前時代曾經(jīng)存在的大陸橋穿越北極地區(qū)的白令海峽到達美洲。美洲土著人最早的一批人具體是在什么時候來到我們現(xiàn)在所知道的加利福尼亞地區(qū)的，誰也說不清楚。這些移民的風(fēng)俗習(xí)慣以及語言在他們的新家都得以延續(xù)。s spirits , it was going to be just as wonderful as last year!She smiled to herself gaily and went out of the cave to wele her friends and neighbours.第三篇：高中英語人教版選修8翻譯課文翻譯英語 選修8 翻譯Unit1 一個多元文化的國家加利福尼亞是美國的第三大州，而且是人口最多的州。現(xiàn)在，咱們?nèi)⒂^洞穴好嗎？ THE FEAST: 18,000 BC Worried about the preparations for her feast, Lala quickly turned for home with her collection of nuts, melons and other was the custom of family groups to separate and then gather again at different sites for reunions as they followed the animal herds acrossthe wrinkle appeared on her only it could be just like last year!At that time she had been so happy when Dahu chose her as the future mother of his was the best toolmaker in the group and it was a great honour for her to be remembered the blood pulsing through her had felt so proud as the group shouted loudly to applaud his only she had looked ahead and planned better this year!Then she wouldn39。他們并不種植谷物，而是在野果熟了的時候采摘它們并捕殺野獸來充饑。眷客，更殼又是怎么來的呢？考：早期人類之間也許有貿(mào)易來往，或者他們也可能旅行到海邊去。毫無疑問，當時湖里是有魚的。你還認得別的骨頭嗎？ 學(xué)1：這根很像魚骨頭，對嗎？考：很對。確實是既難又臟的活！現(xiàn)在來看看這個吧。然后，他們可能在獸皮上擦上大量的鹽，使皮變?nèi)彳?。我們不斷發(fā)現(xiàn)一些磨削其他工具用的工具。你能猜出他們用的是什么嗎？ 學(xué)1：哇，他們穿的衣服全都是用獸皮做的嗎？他們那些衣服是怎樣做成的？我確信它們裁剪并縫起來又厚又重。這個東西最多三厘米長，看起來像是用骨頭做的。我們認為這些野獸對他們來講是最危險的敵人了。我們還沒有找到門，但我們認為在天寒地凍的冬季他們可能是用獸皮掛在洞口來防寒的。他們用地爐里的火來取暖、做飯，還可以用火來嚇跑野獸。想必是很不舒服的了。你是個敏銳的觀察者，在高山上的那些洞穴里我們找到了人骨和獸骨，還有工具和其他物品因此，我們有理由認為他們不顧嚴寒，就住在這些洞穴里。我們在這兒進行的挖掘工作已經(jīng)很多年了，而且…… 學(xué)1：對不起，打斷一下你的講話，請問他們是怎么住在這個地方的呢？這兒只有石頭和樹木。很高興見到你們這些從英國來的對考古學(xué)感興趣的學(xué)生。有一位考古學(xué)家（考）正領(lǐng)著他們參觀。s why they are called hunters and , why don39。s made of?.S4:Let me , I think some of the beads are made of animal bones but others are made of :How clever you are!One bone is actually an animal tooth and the shells are from the you identify any other bones?S1:This one looks very much like a fish that reasonable? A:Yes, indeed, as the botanical analyses have shown us, all the fields around here used to be part of a large shallow there were fish in :But a lake is not the are miles from the sea, so how did the seashells get here? A:Perhaps there was trade between early peoples or they travelled to the seaside on their know that they moved around, following the herds of didn39。s a primitive early people really care about their appearance like we do? It39。t have material like we have you guess what they used? Sl: Wow!Did they wear clothes made entirely of animal skins? How did they prepare them? I39。s a , does that mean they repaired things? A: What else do you think it might have been used for? S4: Let me look at 39。t found any doors but we think they might have hung animal skins at the cave mouth to keep out the cold during the freezing : What wild animals were there all that time ago? A: Well, we39。t have mats, blankets or quilts like we must have been very : We39。ve been excavating here for many years and...S1: I39。s usually considered very effective...(fades out as they go offstage together)選修8 Unit 5 Meeting your ancestorsReading A VISIT TO THE ZHOUKOUDIAIN CAVES A group of students(S)from England has e to the Zhoukoudian caves for a archaeologist(A)is showing them : Wele to the Zhoukoudian caves here in is a great pleasure to meet you students from England, who are interested in must be aware that it39。t we? H: Well, we39。s another problem, are we going to do once the experiment is over?H:(heartily)Throw her : But you cannot overlook that!She39。ll be how to teach her grammar, not just 39。d never have e if I39。ve never had a bath in my life。t natural and it39。 dursn39。ll have to do the won39。m Eliza Doolittle and I39。ll buy her new 39。ll teach you.(to Mrs Pearce)But she39。re the greatest teacher alive if you can pass her off as a 39。ll be worse than a : I say, you remember what you said last night? I39。s the best offer I39。less I speak here I am, ready to pay 39。 selling flowers in the they won39。s no use at her :(gently to Eliza)What do youwant, young lady? E:(upset)I wanna be a lady in a flower shop 39。ve got this girl in my 39。ll her in, Mrs :(only half resigned to it)Very well, sir.(goes downstairs)H: This is a bit of 39。t distinguish most of :(laughing)Well, that es with is a knock and Mrs Pearce(MP), the housekeeper, es in with cookies, a teapot, some cream and two :(hesitating)A young girl is asking to see : A young girl!What does she want? MP: Well, she39。 house the next Higgins and Colonel Pickering are sitting deep in : Do you want to hear any more sounds? CP: No, thank rather fancied myself because I can pronounce twentyfour distinct vowel sounds。希金斯。（一道離去）伊：（驚奇地看著收集起來的錢）啊，我還從來沒有見過！整整一個英鎊呢！一筆財富呀！這的確給我?guī)痛竺α耍娴?。希金斯。我自己就學(xué)了好多種印度方言，而且…… 希：真的嗎？那你認不認得皮克林上校呢？ 皮：當然認得，皮克林就是我。這些工作都要求英語說得好呢。不過，先生，（高傲地）要是一旦有人教她把英語說好了，她就可以在三個月以內(nèi)冒充公爵夫人出席大使主辦的花園晚會了。這是個致富的年代人們從倫敦的窮人區(qū)開始工作，年收入才80英鎊，最后到了富人區(qū)工作，年收入就是10萬英鎊了，但是他們一張嘴就會露出馬腳（暴露自己的身份）。我可