But one thing is for sure:the possibilities are endless.
1.The purpose of the first paragraph is to .
A.describe the benefits that 3-D printing has brought to all of our lives
B.picture a future life with 3-D printing in wide use
C.list some major 3-D printing breakthroughs
D.give the history of 3-D printing
解析:写作意图题。根据“Yetimpossibleassomeofthesethingsmayseem,they’reclosertorealitythanyoumightthink.”可知第一段中作者想象了未来3-D打印技术普及后人们日常生活的场景。这并不是真实生活中的情景,里面的技术也不一定是真实存在的。
答案:B
2.Compared with traditional manufacturing procedures,3-D printing .
A.could produce complicated products in larger sizes or numbers
B.has an advantage in meeting the personal needs of customers
C.relies less heavily on the use of 3-D scanners
D.produces separate parts of an object before joining them together
解析:细节理解题。根据“Theideaof3-Dprintingistoproducecomplicatedshapesinaverypersonalizedway.”可知B项正确。根据“Ifyouwanttomakeatotallynewobject,youneedtomakeavirtualdesigninaCAD(computeraideddesign)filefirst”可知C项太绝对。根据“...the3-Dprintermakespaper-thinslicesoutofliquid,plasticormetalandputsthemtogethertocreatetheobjectyouwant”可知D项错误。
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