-学高中英语unitmeetingyourancestorslistening练习新人教版选修

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1、UsingLanguageDATINGMETHODSZhouHeping(ZH)hascometoaskthearchaeologist,RichardLeakey(RL),howhedatestheboneshefinds.ListentoPart1.Listenagainandfillintheblanks.ZH:Howcanyoutellhowold______arewhenyoufindthem?RL:Thereare____mainways:thefirstusesthelayersinthegroundandthe______usesr

2、adiocarbondating.ZH:Isee.Howdoesthelayermethod____?RL:Well,lookatthediagraminyourbook.Thinkofawastepaper______.Whenyoucameintowork,youateanorangeandthrewtheorange_____intoit.That’slayernumber1.Latersomebody______someyogurtpotsintoit.That’slayernumber2.ZH:Ohyes,andthenIthrewsom

3、epaperintoit.Sothat’slayernumber3.RL:Yes,and______someonethrewawaysomeusedenvelopes.Sohow______layersarethereinthiswastepaperbasket?ZH:Thereare______.RL:Whichlayeristhe____andthereforethe_______?ZH:Theorangeskin.RL:Andwhichisthe_____andthereforethemost_______?ZH:Ofcourse–theus

4、ed_________.Iseehowitworksnow.Buthowdoesithelp?RL:Well,layersofsoilare__________atdifferenttimeslikethelayersinyourwastepaperbasket._____timepeoplelivesomewhere,theymakealayerinthesoil.Iftheylivetherefora_____time,theymakealotoflayers.Eachlayerhasadifferent_______andtexturewhi

5、chweusetofindout____olditis.ZH:Howsplendid!ListentoPart2.Listenagainandfillintheblanks.ZH:Nowwhataboutradiocarbon______?RL:Thisismore________.Itusesradioactivitytomeasuretheamountofcarboninlivingthings.Thecarboninadeadbody___________atafixedrate.Weknowhowlongthattakes,sowecan_

6、______theamountofcarbonandworkouthowoldaboneis.ZH:That'sveryclever.Isit________too?RL:Therearesomeproblemswithveryoldbones,soyouarealwaysgiven____dates.ZH:Howdoesthatwork?RL:Well,thedateforabonemaybebetween_____yearsand______yearsold.ZH:Isee!HowoldarethebonesintheZhoukoudian__

7、____?RL:Theyarebetween________and________yearsold.ZH:Perhapswecouldvisitthe_____togethersometime?RL:Ofcourse.Wheneveryoulike!Workbook-ListeningMORENEWSABOUTTHETERRACOTTAWARRIORS3AmandaPeters(AP)wantstofindoutabouthowtopreservetheterracottawarriorsfromherChinesefriend,ZhouLei(Z

8、L),anarchaeologist.Listenagainandfillintheblanks.AP:Wheredidy