在线名词解释大全 - 生活英语进阶 - 详细

Choosethemostappropriateanswerbycompletingthesentencesbeloworansweringthequestions.1.3Dprintingtechnologysignalsthebeginningofthe_______.

A
A.first industrial revolution
B
B.second industrial revolution
C
C.third industrial revolution
D
D.fourth industrial revolution
正确答案:
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