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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