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时间:2018-12-05
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1、英语专业四级阅读练习题(三)温馨提示:帮考网外语免费练习题,如需完整题库请登录http://news.bangkaow.comAsthemerchantclassexpandedintheeighteenthcenturyNorthAmericanColonies,thesilversmithandthecoppersmithbusinessesrosetoserveit.OnlyafewsilversmithswereavailableinNewYorkorBostoninthelateseventeenthcentury,butintheeightee
2、nthcenturytheycouldbefoundinallmajorcolonialcities.Noothercolonialartisansrivaledthesilversmiths’prestige.Theyhandledthemostexpensivematerialsandpossesseddirectconnectionstoprosperouscolonialmerchants.Theirproducts,primarilysilverplatesandbowls,reflectedtheirexaltedstatusandtestifi
3、edtotheircustomers’prominence.Silverstoodasoneofthesurestwaystostorewealthatatimebeforeneighborhoodbanksexisted.Unlikethesilvercoinsfromwhichtheyweremade,silverarticleswerereadilyidentifiable.Oftenformedtoindividualspecifications,theyalwayscarriedthesilversmith’sdistinctivemarkings
4、andconsequentlycouldbetracedandretrieved.Customersgenerallysecurethesilverforthesilverobjecttheyordered.Theysavedcoins,tookthemtosmiths,anddiscussedthetypeofpiecestheydesired.Silversmithscompliedwiththeserequestsbymeltingthemoneyinasmallfurnace,addingabitofcoppertoformastrongerallo
5、y,andcastingthealloyinrectangularblocks.Theyhammeredtheseingotstotheappropriatethicknessbyhand,shapedthemandpresseddesignsintothemforadornment.Engravingwasalsodonebyhand.Inadditiontoplatesandbowls,somecustomerssoughtmoreintricateproducts,suchassilverteapots.Theseweremadebyshapingor
6、castingpartsseparatelyandthensolderingthemtogether.Colonialcoppersmithingalsocomeofageintheearlyeighteenthcenturyandprosperedinnortherncities.Copper’sabilitytoconductheatefficientlyandtoresistcorrosioncontributedtoitsattractiveness.ButbecauseitwasexpensiveincolonialAmerica,coppersm
7、ithswereneververynumerous.VirtuallyallcopperworkedbySmithswasimportedassheetsorobtainedbyrecyclingoldcoppergoods.Copperwasusedforpracticalitems,butitwasnotadmiredforitsbeauty.Coppersmithsemployedittofashionpotsandkettlesforthehome.Theyshapeditinmuchthesamemannerassilverormelteditin
8、afoundrywithleadortin.They
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