A.change the way people make products |
B.be applied as widely in our daily lives as computers |
C.forbid many countries to make purchases of weapons |
D.take the place of normal printers and save lots of energy |
A.Over 600 3-D printed objects were on display in an exhibition. |
B.3-D printing technology came to be used in various fields. |
C.The world’s first 3-D printed gun was successfully made. |
D.The 3-D printer became more affordable for consumers. |
A.Amused. | B.Objective. |
C.Supportive. | D.Negative. |