2017高考新课标全国1卷英语试题及答案.docx

2017高考新课标全国1卷英语试题及答案

D

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C．Itshouldkeepupwiththetimes.

D．Itchangesevery50years.

31．Whichofthefollowingcanbethebesttitleforthetext?

A．ExploringtheFutureofJazz.

B．TheRiseandFallofJazz.

C．TheStoryofaJazzMusician.

D．CelebratingtheJazzDay.

D

Abuld-it-yourselfsolarstill（蒸馏器）isoneofthebestwaystoobtaindrinkingwaterinareaswheretheliquidisnotreadilyavailable.DevelopedbytwodoctorsintheU.S.DepartmentofAgriculture,it’sanexcellentwatercollector.Unfortunately,youmustcarrythenecessaryequipmentwithyou,sinceit’sallbutimpossibletofindnaturalsubstitutes.Theonlycomponentsrequired,though,area5＇5＇sheetofclearorslightlymilkyplastic,sixfeetofplastictube,andacontainer—perhapsjustadrinkingcup—tocatchthewater.Thesepiecescanbefoldedintoaneatlittlepackandfastenedonyourbelt.

Toconstructaworkingstill,useasharpstickorrocktodigaholefourfeetacrossandthreefeetdeep.Trytomaketheholeinadampareatoincreasethewatercatcher’sproductivity.Placeyourcupinthedeepestpartofthehole.Thenlaythetubeinplacesothatoneendrestsallthewayinthecupandtherestofthelinerunsup—andout—thesideofthehole.

Next,covertheholewiththeplasticsheet,securingtheedgesoftheplasticwithdirtandweightingthesheet’scenterdownwitharock.Theplasticshouldnowformacone(圆锥体)with45-degree-angledsides.Thelowpointofthesheetmustbecentereddirectlyover,andnomorethanthreeinchesabove,thecup.

Thesolarstillworksbycreatingagreenhouseundertheplastic.Groundwaterevaporates(蒸发)andcollectsonthesheetuntilsmalldropsofwaterform,rundownthematerialandfalloffintothecup.Whenthecontainerisfull,youcansucktherefreshmentzxxkoutthroughthetube,andwon’thavetobreakdownthestilleverytimeyouneedadrink.

32.Whatdoweknowaboutthesolar