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1、2019-2020年高三英语周测题（12.21）AccordingtotheUSgovernment,windfarmsoffthePacificcoastcouldproduce900gigawattsofelectricityeveryyear．Unfortunately,thewaterthereisfartoodeepforeventhetallestwindmills（seepicture）totouchbottom．AnexperimentunderwayoffthecoastofNor
2、way,however,couldhelpputthemanywhere．Theproject,calledHywind,istheworld’sfirstlarge-scaledeepwaterwindturbine（涡轮发电机）．Althoughitusesafairlystandard152-ton,2.3-megawattturbine,Hywindrepresentstotallynewtechnology．Theturbinewillbefixed213feetabovethewater
3、onafloatingspar（seepicture）,atechnologyHywind’screator,theNorwegianpanyStatoilHydro,hasdevelopedrecently．Thesteelspar,whichisfilledwithstonesandgoes328feetbelowtheseasurface,willbetiedtotheoceanfloorbythreecable（缆索）；thesewillkeepthesparstableandprevent
4、theturbinefrommovingupanddowninthewaves．Hywind’sstability（稳定性）inthecoldandroughseawouldprovethateventhedeepestcornersoftheoceanaresuitableforwindpower．Ifallgoesaccordingtoplan,theturbinewillstartproducingelectricitysixmilesoffthecoastofsouthwesternNorw
5、ayasearlyasSeptember．Toproduceelectricityonalargescale,amercialwindfarmwillhavetousebiggerturbinesthanHywinddoes,butit’sdifficultenoughtobalancesuchalargeturbinesohighonafloatingsparinthemiddleoftheocean．Tomakethatturbineheavier,thewholespar’scentreofg
6、ravitymusttomovedmuchclosertotheocean’ssurface.Todothat,thepanyplanstodesignanewkindofwindturbine,onewhosegearbox（变速箱）sitsatsealevelratherthanbehindtheblades（seepicture）Hywindisatestrun,butthebenefitsforperfectingfloatingwind-farmtechnologycouldbeextre
7、melylarge．Outatsea,thewindisoftenstrongerandsteadierthanclosetoshore,whereallexistingoffshorewindmillsareplanted．Deep-seafarmsareinvisiblefromland,whichhelpsoverethewindmill-as-eyesoreobjection．Ifthetechnologycatcheson,itwillopenupvastareasoftheplanet’
8、ssurfacetooneofthebestlow-carbonpowersourcesavailable．63．TheHywindprojectusestotallynewtechnologytoensurethestabilityof_______．A．thecableswhichtiethespartotheoceanfloorB．thesparwhichisfloatingindeep-seawaterC．thebladesdrivenbystrongands
