英语必修5课本答案.docx

英语必修5课本答案.docx

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英语必修5课本答案

英语必修5课本答案

【篇一：

人教版高中英语必修五workbook练习答案及听力原文】

t>unit1warmingup?

answers:

1archimedes,ancientgreek（287-212bc）hewasamathematician.hefoundthatifyouputanobjectintowaterthewaterpushestheobjectup.itrisesandpartlyfloats.theforceofthewaterpushingitupisthesameastheweightoftheobject.2charlesdarwin,british（1808-1882）theoriginofspecieswaspublishedin1859.itexplainedhowplantsandanimalshadchangedovertimetofitinwithachangingenvironment.atthetimeitwaspublisheditwasverycontroversial.manypeoplebelievedthebiblewhenitsaidthatgodmadethefirsttwopeople（adamandeve）andthatallotherpeoplecamefromthesetwo.darwin’sbookshowedthatpeoplehaddevelopedfromapesinstead.sothiscausedalotofargumentbetweenreligiousandscientificpeople.howeverdarwin’sideabecameveryinfluentialandisstillacceptedtoday.3thomasnewcomen,british（1663-1729）heimprovedthefirststeampumpbuiltbythomassaveryin1698andturneditintoasteamenginefortakingwateroutofminesin1712.jameswattimproveditstillfurtherinthe1770sturningitintothefirstmodernsteamengineusedontherailways.4gregormendel,czech（1822-1884）hegrewpeaplantsanddevelopedideasonheredityandinheritedcharacteristics.heconcentratedoncross-fertilisingpeaplantsandanalyzingtheresults.between1856-1863hegrew28,000peaplants.heexaminedsevenkindsofseedandplantcharacteristicsanddevelopedsomelawsofinheritance.thefirstisthatinheritancefactorsdonotcombinebutarepassedtothenextgenerationintact.second,hefoundthateachpartnergiveshalftheinheritedfactorstotheyoung.third,someofthesefactorsshowupintheoffspring（andsoaredominant）.theotherfactorsaremaskedbythedominantones（andsoarerecessive）.5mariecurie,polishandfrench（1867-1934）shewasborninpolandandcametostudyinfrancein1891andshelivedtherefortherestofherlife.in1898shediscoveredradium.shereceivedtwonobelprizes,one（withpierrecurie）forphysics（1903）andoneforchemistry（1911）.sheistheonlypersontohavebeensohonoured.onthedeathofherhusbandshetookoverhisjobatthesorbonneinparis.herworkonradioactivityandthediscoveryofradiummeantthatshebegananewscientificareaofresearch.shewasthefirstwomantoreceiveanobelprizeandthefirstwomantoteachatthesorbonne.6thomasedison,american（1847-1931）hewasalreadyaninventorofotherelectricaldevices（phonograph,electriclightbulb）whenin1882hedesignedasystemforprovidingnewyorkwithelectricityfromacentralpowerstation.thiswasatremendousachievement,whichhadpreviouslybeenthoughtimpossible.7leonardodavinci

italian（1452-1519）he

wasafamousartistwhoseskillforshowinghumanskintonesmadehispaintingsseemtocomealive.heusedtostudydeadpeopleinordertomakehispaintingsasaccurateaspossibile.someofhisfamouspaintingsinclude“theadorationofthemagi”andthe“thelastsupper”.laterinhislifehelivedinfrancewherehedesignedasubmarineandaflyingmachine.

8sirhumphrydavy,british（1778-1829）hedidresearchintodifferentgasesanddiscoveredthemedicinalvalueofnitrousoxide（orlaughinggas）asananaesthetic.in1815hedevelopedasafetylampforminers.previouslytherehadbeenmanyaccidentswhencandlesontheminers’helmetshadexplodedwhenitcameintocontactwithundergroundgasfromthecoaltheminersweredigging.thesafetyhelmetmadeworkingundergroundverymuchsafer.

9zhangheng,chinese（78-139）heinventedthefirstseismographtoindicateinthedirectionofanearthquake.itwasintheshapeofacylinderwitheightdragonheadsroundthetop,eachwithaballinitsmouth.aroundthebottomwereeightfrogsdirectlyunderadragon’shead.whenanearthquakeoccurred,aballfelloutofthedragon’smouth,makinganoise.

10stephenhawking,british（1942-）hehasworkedinastronomyandstudiedblackholesinspace.hehasshownthatblackholesdonotonlyabsorbeverythingaroundthembut,fromtimetotime,throwoutmatteraswell.thismaymarkthebeginningofnewgalaxies.thisisanadvanceontheoldtheorywhichsaidthatblackholes“eat”everythingtheycomeacross.comprehending

?

answerkeyforexercise1:

1anoutbreakofcholerahitlondonin1854.

2johnsnowbegantotesttwotheories.3johnsnowinvestigatedtwostreetswhere

theoutbreakwasverysevere.

4johnsnowmarkedthedeathsonamap.5hefoundthatmostofthedeathswerenearawaterpump.

6hehadthehandleremovedfromthewaterpump.

7heannouncedthatthewatercarriedthedisease.

8kingcholerawasdefeated.?

answerkeyforexercise2:

1johnsnowfinallyprovedhisideabecausehefoundanoutbreakthatwasclearlyrelatedtocholera,collected