选修8==Unit2 Reading

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1、ReadingUnit2:CloningTwinsTheyarebornnaturallyandidenticalinsexandappearance.AstrawberryplantThenewplantsthatgrowfromtherunnersareexactcopiesoftheoriginalplant.一株草莓依靠它沿地“爬走”的匍匐茎,一年内就能长出数百株草莓苗。富贵竹插枝即活Thegardenershouldcuttheplant,thenthecuttingproduceanothernewplant.199

2、6cloningsheeps2001cloningcattle我国成功繁殖克隆兔体形要比普通兔大许多2002年5月中旬成功地繁殖了一只胚胎细胞克隆兔。2002cloningcats2002年4月16日美国第一头克隆牛“艾米”产下牛犊。2005cloningdogsInpairsdiscusswhatyouunderstandaboutcloning.Thenlistthequestionsyouwanttofindout.Shareyourlistswithoneanother.Pre-reading1.Whatisaclon

3、e?Acloneisananimaloraplantproducednaturallyorartificiallyfromthecellsofanotheranimalorplantandisexactlythesameasit.2.Howisacloneproduced？1)Thecloningofplantsissimpleandrelativelyeasy.Itcanbedonebytakingcuttings(man-madecloning)orlettingtheplantproduceitsownrunners(na

4、turalcloning).2)Thecloningofanimalsismorecomplicated.Itwasnotachieveduntil1996andisfullyexplainedinthefirstreading.3.Whatbenefitscanhumansgainfromcloning？Medicalcloningcanhelpcureseriousillnessesthatruinone’squalityoflife(suchasParkinson’sdiseaseorAlzheimer’sdisease)

5、.Itcanhelpinfertilepeoplehavebabies.4.Whatproblemsmayarisewhenhumansarecloned?Peoplemaywanttoclonethemselvessotheycanliveforever.Peoplemaywanttoclonedeadchildren.Peoplemaywanttoclonetheirfavouritepets.1.Whatisthemaintopic?_____A.Cloning.B.Dollythesheep.C.Itwillleadus

6、tosomeplaces.2.Whatisthewritingstyle?____A.Expositive(说明性的).B.Descriptive.C.Argumentative(议论性的).Cloning:Whereisitleadingus?AAScanningLearningtips:Thepassageiswrittenintheexpositivestyle.Thatistosaythetextisinthethirdpersonandinfactualandformallanguage.Itgivesdifferen

7、tpointsofviewanddoesnottrytopersuadethereadertomakeuphis/herownmind.3.Dollythesheep_____.A.lookedexactlylikethesheepthatprovidestheegg.B.wastheexactcopyofthesheepthatprovidesthenucleus.C.lookedlikethesheepthatgavebirthtoit.D.hadthecharacteristicsofallthreesheep.B4.It

8、canbeinferredfromthepassagethataclonedanimal_____.A.usuallylivesaslongastheoriginaloneB.usuallyliveslongerthantheoriginaloneC.u