Question

16．You've heard of 3D printing from newspaper and TV programs．It can"print"in plastic，metal，nylon，and over a hundred other materials.3D printing technology has been around since the 1980s，it was not widely used until the early 2010s．The first working 3D printer was created in 1984 by Chuck Hull．
3D printers use many different types of technologies，but they all share one thing in common：they create a three-dimensional（維度的） object by building it layer（層），by continuing layer，until the whole object is completed．Imagine a baker lay down each layer one at a time until the whole cake is formed.3D printing is somewhat similar，but just a bit stricter．How can 3D printers work so well？The most important thing-a program，a 3D printer also needs to have instructions for what to print from a computer．It needs a file as well．The file which is a Computer Aided Design （CAD） paper is created with the use of a 3D modeling program．The program creates a paper that is sent to the 3D printer．Along the way，software pieces the design into hundreds，or more likely thousands of layers．The 3D printer builds up one layer at a time，from the bottom to the top，until the object is done．
3D printings can be used for making many kinds of things such as machine parts，daily life objects，even human organs（器官） using a person's own cells．
Nowadays，Marc．Dillon founds a project which deals with many world famous paintings like Leonardo da Vinci's Mona Lisa，Van Gogh's Sunflower with 3D technology．This project helps the blind people enjoy the fantastic art through touching．In order to provide a good user experience，these 3D paintings have special instruments which can tell people what they touch．

49．The first working 3D printer was created inB．
A.1980      
B.1984      
C.2001      
D.2010
50．From Paragraph 2，we can know thatA．
A．how a 3D printer works         
B．what a 3D printing is                     
C．questions of a 3D printer           
D．uses of a 3D printer
51．According to the passage，Dcan help the blind know what they touch．
A．CAD paper                          
B．Machine parts．
C．The world famous paintings        
D．Special instruments 
52．Which of the following is true？C
A.3D printers use 3 types of technologies．
B.3D printers make printings from the top．
C.3D printers work as a baker makes a cake．
D.3D printers piece the design into a few layers．

Answer 1

分析 文章介紹了一種新的高科技--三維印刷技術(shù)．它可以"打印"在塑料、金屬、尼龍和一百多種其他的材料上．第一個(gè)工作三維打印機(jī)始于1984年，直到2010年才被廣泛地使用．三維印刷可以用來做許多事情，如機(jī)器零件，日常生活物品，甚至使用自身細(xì)胞的人體器官．有些三維圖畫通過特殊的儀器讓盲人去感知他們所觸摸到的東西．

解答 49．B．細(xì)節(jié)理解題．根據(jù)"The first working 3D printer was created in 1984 by Chuck Hull．"可知第一個(gè)工作三維打印機(jī)始于1984年．故選B．
50．A．細(xì)節(jié)理解題．根據(jù)"3D printers use many different types of technologies，"How can 3D printers work so well？The most important thing-a program，a 3D printer also needs to have instructions for what to print from a computer．"可知此段主要介紹3D打印機(jī)是如何工作的．故選A．
51．D．細(xì)節(jié)理解題．根據(jù)"In order to provide a good user experience，these 3D paintings have special instruments which can tell people what they touch．"可知有些三維圖畫通過特殊的儀器讓盲人去感知他們所觸摸到的東西．故選D．
52．C．細(xì)節(jié)判斷題．根據(jù)"Imagine a baker lay down each layer one at a time until the whole cake is formed.3D printing is somewhat similar，"可知三維印刷與面包師制作蛋糕有點(diǎn)相似之處．故選C．

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