下列哪一项是对下图所反映史实的正确描述
A.该项发明最早产生于隋唐时期
B.毕昇改进后提高批量印刷速度
C.是书写材料一次伟大的革命
D.直接推动了科举制度的形成
答案:C
This city, ______ lies in the northeast, was the country's busiest port from 1648 to 1950.[ ]
A. that
B. which
C. what
D. where
传媒产业