首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A need for beauty, lightness, corrosion resistance, or other specific properties must be present before plastic can be considere
A need for beauty, lightness, corrosion resistance, or other specific properties must be present before plastic can be considere
admin
2010-01-10
29
问题
A need for beauty, lightness, corrosion resistance, or other specific properties must be present before plastic can be considered as competitors of brick, window glass, cement, cast iron, or steel, since volumetric prices are so low for the last substance and for wood. It is not particularly unfortunate that plastics do not appear economical for every use. There is no reason why industry should want to replace wood, brick, concrete, and metals when the latter are adequate and inexpensive. Too much has been written about the coming "Plastics and Light Metal Age," which is prophesized as the successor to the Stone Age, the Bronze Age, and the Iron Age. In the historical sequence of these earlier periods, there is logic in the quantitative sense; one age gave way to another when the use of a new material exceeded in quantity that of its predecessor. For the plastics and light metals, however, a different picture presents itself; less than 3,000,000 tons of all these materials are being produced annually, while steel production exceeded 90,000,000 tons last year and will probably not recede to less than 60,000,000 tons for many years. This is still the Iron Age or rather the Steel Age.
The writer considers that the Bronze Age succeeded the Stone Age because
选项
A、there was a scarcity of wood and other building materials
B、bronze was less expensive than stone
C、stone was no longer available
D、more bronze than stone came into use
答案
D
解析
文中有"one age gave way to another when the use of a new material exceeded in quantity that of its predecessor.”因此更多的青铜使用率是主要原因。
转载请注明原文地址:https://jikaoti.com/ti/c95MFFFM
0
专业英语四级
相关试题推荐
(1)Mymother’shandsaredeepincabbageleaves,hersleevespusheduppastherelbows,asshesiftsthroughwater,salt,andve
(1)DirectorsofOccidentalPetroleumCorp.wanttokeepChiefExecutiveRayR.Iranisafe.Sotheyspent$774,756lastyearonh
(1)DirectorsofOccidentalPetroleumCorp.wanttokeepChiefExecutiveRayR.Iranisafe.Sotheyspent$774,756lastyearonh
(1)Acelebrityisawidely-recognizedorfamouspersonwhocommandsahighdegreeofpublicandmediaattention;therefore,one
(1)WhenoutsourcingcompanyKeaneInc.hiredJyotiTaneja10monthsagotoworkinitsGurgaon,India,offices,herparentswere
(1)There’sabriefsceneinthebackhalfofPixar’sUpinwhich8-year-oldRussellrecallshow,yearsbefore,hisestrangedfa
(1)Wehaveallbeeninstructedtowashourhandsbeforeeatingtoavoidingesting"germs."Microorganisms(bacteria,protozoa,an
Thefollowingtwoexcerptsareaboutwhetherparentsofjuvenileoffendersshouldbeheldlegallyresponsiblefortheirchildren
A、SittingwatchingTV.B、Readingabook.C、Stayingalone.D、Gatheringwithfriends.D男士问女士何时抽烟最多,女士先说是看电视时,然后说是读书时,后来又说是在公司期间,最后
(1)TheTerm"CYBERSPACE"wascoinedbyWilliamGibson,ascience-fictionwriter.Hefirstuseditinashortstoryin1982,an
随机试题
兰陵笑笑生所作的《______》是中国第一部文人独创的长篇小说,又是第一部以家庭生活为题材的长篇小说。
A.破裂孔B.卵圆孔C.眶上裂D.圆孔E.颈动脉孔上颌神经出颅于
新生儿低血糖的诊断标准为
限制进出口技术实行目录管理,对于目录范围内的限制进出口技术,实行许可证管理,未经国家许可,不得进出口。
销售的500台计算机的销项税额为( )万元。当月的全部进项税额为( )万元。
某企业为增值税一般纳税人,适用的增值税税率为17%。该企业2016年购入一台需要安装的生产用设备,取得的增值税专用发票上注明的设备买价为50000元,增值税额为8500元,支付的运杂费和保险费为3500元,设备安装时领用工程用材料价值1000元(不含增值税
2009年,某省第二产业增长20%。其中,工业增长21.2%,建筑业增长11.2%。请问2009年该省建筑业占第二产业的比重为多少?()
【C1】______London’sHeathrowAirportisthebusiestinternationalairportinEurope,Amsterdam’sSchipholAirporthasalwayscl
Thegreatchariotofsociety,whichforsolonghadrundownthegentleslopeoftradition,nowfounditselfpoweredbyaninter
A、Byaskinghisfriend.B、Bycallingthetelephoneoperator.C、Byreferringtothereceptionist.D、Byfindingitinthephonebo
最新回复
(
0
)