The underlined word 'innovations' in Para.2 may be replaced by 查看材料
A.2
B.efficiency
B.productivity
C.innovations
D.transforming
【参考答案】
C
根据“novations”之后的内容“asthespinningjenny,thesewingmachine,thetypewriter,andthevacuumcleaner…”可知纺纱机、缝纫机、打字机、吸尘器之类的产生属于科技上的革新。C项“innovations”意为“革新,革命......
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