1、Unit41.Thishopeisthatbycombiningcloningwithgeicengineeringscientistwillbeabletocreateapopulationofpigswhosegansdonottriggerarejectionwhentransplantedintohumans.2.AlthoughthefivepigletswerenotgeicallyengineeredPPLhasgrown

2、pigcellsinthelabsuccessfullyknockedoutonegeneresponsiblefinitiatingrejection.3.Scientistswhoobservedtheirchangesoverthecourseof18yearssaythatlargerlizardsshrankmethansmalleronesfemalesshrankmethancomparablysizedmates.Per

3、iodsofgreatestshrinkagecoincidedwithElNinoeventswhenfoodsupplieswerediminished.4.Ifwecanunderstthemechanismfboneshrinkageregrowthinlizardstheknowledgemightsomedaybeappliedtoreversethedebilitatingconditionsinhumans.5.RidK

4、leinananthropologistatStanfdUniversityinCalifniasaidthatearlymodernhumans100000yearsagowereconfinedtoAfricaseemednodifferentfromtheirnowextinctcousinsHomoNeerthalensisHomoErectusinEuropeAsia.6.科學家以前克隆了奶牛和山羊，但是豬已成了移植研究的核心

5、，因為它們在生理上與人類更相似。7.世界上第一窩克隆豬的誕生點燃了人們的希望，即豬很快就會成為人類器官捐贈者。8.他把從細菌的細胞壁提取的有害物質(zhì)注射到動物體內(nèi)，這種毒素會使動物的免疫系統(tǒng)做出反應，就好像有傳染病似的。9.哺乳動物共有基因的一個微小突變可能已改變了人類的命運。Unit51.Histiansaremeusedtoanalyzingamixtureofingredientsgoodbadintentionssuccessfa

6、ilurehighendeavsthreatenedbyflawsinexecutiontobalanceoutthesumsendingwithacarefulplusminus.2.Hesoughtpowerwithoutpretendingotherwiseexercisedittothefull.Butheissingularperhapsuniqueinhistyinthathewasnevercruptedbypower.3

7、.AsthewarcontinuedthecasualtyfiguresgrewhefoundaconvincedagnosticfaiththattherewassomedivinepurposeintheaffairsofmenthoughhecouldnotdefineconfinethedeitywithinanyChristianconfession.4.WithoutLincoln’spresidencytheftuneso

8、fallothernations“soconvincedinliberty”wouldhavebeenatrisktherestofwldwouldhavebeenleftonitsowntofacethedarkfceswhichravagedtheglobeinthetwentiethcentury.5.林肯非常難得，他為歷史提供了很多思索和反思的東西，卻沒留下什么可以爭議的地方，除了政策執(zhí)行方面存在些缺點外。6.人必須觀察事件的盛

9、衰變化并依照他在事件發(fā)展中認識到的采取行動。他并不認為人可以讓上帝偏離其進程。7.林肯對自身能力的謙虛使他免受充滿妒忌的競爭或爭執(zhí)：他甚至在最令他痛苦的批評者的觀點中和叛軍的首領身上都看到真誠。8.在需要決斷時他表現(xiàn)出的明顯的猶豫同時激怒了他的支持者和敵對者，但是他把他們的批評轉(zhuǎn)化成建設性的建議，從中最終形成自己的決定。Unit61.GegeMasonUniversityinstructAnneMarchantcallsthem“pat

10、chwkplagiarists”thestudentswhocopypastetogetherpassagesfromarticlesthey’vefoundontheInterthenturninthewkastheirown.。2.ProfesssareusingthecomputertofightbacklaunchingIntersearchestofindthesourceofpurloinedmaterialsinstall

11、ingsoftwarethatdetectssimilaritiesinstudents’papers.3.Thecomputerhasmadecheatsoutofstudentswhootherwisewouldneverhaveconsideredsuchtrickerysomeeducatssay.4.Itmattersthatwhethertheguywhobuiltthebridgecheatedhiswaythroughe

12、ngineeringschool.I‘dwryaboutthat.5.SamMlleranassistanttothevisepresidentfstudentaffairsattheUniversityofVirginiawherethematypenaltyfcheatingisexpulsionacknowledgesthatschoolofficialsmightbegettingrelativelyfewcheatingcom

13、plaintsfromteachersbecausetheyarereluctanttosubjectstudentstosuchstrongpunishment.6.高科技作弊包括使用網(wǎng)絡信息，而不注明適當?shù)某鎏帲瑥恼撐木W(wǎng)站購買學期論文，以及通過電子郵件或光盤共享答案和作業(yè)。7.比如，去年春天，分階段上同一門計算機科學課的幾十名學生用電子產(chǎn)品共享一份學年論文，被當場逮到。8.與三年前每個月處理五件案子相比，小組現(xiàn)在每天只處理大約三件。