职称英语考试最新练习题附答案

职称英语考试最新 练习题 用券下载整式乘法计算练习题幼小衔接专项练习题下载拼音练习题下载凑十法练习题下载幼升小练习题下载免费 附答案　Spiderwebsaremorethanhomes,andtheyareingenioustraps.Andtheworld’sbestwebspinnermaybetheGoldenOrbWeaverspider.ThefemaleOrbWeaverspinsaweboffibersthinenoughtobeinvisibletoinsectprey,yet1enoughtosnareaflyingbirdwithoutbreaking.　Thesecretoftheweb’sstrength?Atypeofsuper-resilient2calleddragline.Whenthefemalespiderisreadyto3theweb’sspokesandframe,sheusesherlegstodrawtheairythreadoutthroughahollownozzleinherbelly.Draglineisnotsticky,sothespidercanracebackandforthalong4tospintheweb’strademarkspiral.　Unlikesomespidersthatweaveanewwebeveryday,aGoldenOrbWeaver5herhandiworkuntilitfallsapart,sometimesnotfortwoyears1.ThesilkythreadisfivetimesstrongerthansteelbyweightandabsorbstheforceofanimpactthreetimesbetterthanKevlar,ahigh-strengthhuman-made6usedinbullet-proofvests.Andthankstoitshightensilestrength,ortheabilitytoresistbreakingunderthepullingforcecalledtension,asinglestrandcanstretchupto40percentlongerthanitsoriginal7andsnapbackaswellasnew.Nohuman-madefiberevencomes8.　Itisno9manufacturersareclamoringforspidersilk.Intheconsumerpipeline:high-performancefabrics

forathletesandstockingsthatneverrun2.Thinkparachutecordsandsuspensionbridgecables.Asteady10ofspidersilkwouldbeworthbillionsofdollars—buthowtoproduceit?Harvestingsilkonspiderfarmsdoesnot11becausetheterritorialarthropodshaveatendencytodevourtheirneighhors.　Now,scientistsatthebiotechnologycompanyNexiaarespinningartificialsilkmodeledafterGoldenOrbdragline.The12step:extractsilk-makinggenesfromthespiders.Next,implantthegenesintogoateggcells.Thenannygoatsthatgrowfromtheeggssecretedraglinesilkproteinsintheir13.“Theyounggoatspassonthesilk-makinggenewithout14helpfromus,”saysNexiapresidentJeffryTurner.Nexiaisstillperfectingthe　spinningprocess,buttheyhopeartificialspidersilkwillsoonbesnaggingcustomers15therealthingsnagsbugs.　1.sometimesnotfortwoyears：相当于sometimesitdoesnotfallapartfortwoyears　2.run：(编织物)抽丝　1.AtoughBsoftClargeDsmooth　2.AclothBsilkCnylonDwool　3.ArepairBpullCmoveDweave　4.AhimBherCitDthose　5.ArefixesBreproducesCremakesDreuses　6.AmetalBmassCmaterialDmodel　7.AbredthBlengthCheightDstrength　8.AcloseBwellCopenDawake　9.AhurryBworryCwonderDuse　10.AshipmentBsupplyCrunD

exchange　11.ArunBgoCdealDwork　12.ApreviousBforemostCfirstDfront　13.AmilkBmeatClungsDmuscle　14.AnoBanyCsomeDmany　15.AasfastasBasgentlyasCasfullyasDaslittleas　1.Aflyingbird飞入蜘蛛网时有股冲力，网线坚韧才能捕捉到它，所以选tough。本句中的withoutbreaking也指示tough。　2.B英语中蜘蛛网丝是spidersilk。见第三、第四段分别出现的silkythread和spidersilk。　3.D本句说蜘蛛织网的机制和过程，所以选，weave而且，这种蜘蛛就叫GoldenOrbWeaver。　4.C从上下文判断，along之后接的是thedragline，其代词应为it。　5.D本句说GoldenOrbWeaver与某些种类的蜘蛛不同，它不用每天织新网，只要网不破，就能一直使用下去，有时一用2年，所以选，reuses。　6.C本句将GoldenOrbWesver蜘蛛网的牢度和张度与防弹衣材料Kevlar对比，说明该蜘蛛网坚韧的程度。填入的词应该是Kevlar的同位语，Kevlar是一种材料，所以选material。　7.B除了上下文的意思 要求 对教师党员的评价套管和固井爆破片与爆破装置仓库管理基本要求三甲医院都需要复审吗 填length之外，本句中的用词stretch和longer都指示要用length。　8.Acome后面可接形容词。comeclose意为“接近”。comewell，comeopen，comeawake都能搭配，但意思与上下文配不上。　9.CItisnowonder(that)是“不足为奇，十分自然”的意思。只有选wonder意思才连贯。　10.B从意义上判断，asteadysupply是正确的选择。shipment(运送)、run(运转)或exchange(交换)的意思与上下文配不上。　11.D上下文的.意思要求用“起作用”这个词，英语work在本句的词义是”起作用”。　12.C下一句是以Next开始的。有next，前面很可能有first之类 表 关于同志近三年现实表现材料材料类招标技术评分表图表与交易pdf视力表打印pdf用图表说话 pdf 次序的词。　13.A常识告诉我们，把draglinesilkproteins分泌在milk里，才容易分离出来，所以，选meat，lungs或muscle都是不合常理的。　14.B在without之后要用any，一般不用some。英语不说withoutno…，many不能修饰help。　15.A本题只能选asfastas。若选B、C或D，意思与上下文配不上。