A.平版印刷B.凸版印刷C.孔眼印刷D.凹版印刷
A.300DPI~400DPIB.400DPI~600DPIC.600DPI~800DPID.800DPI~1000DPI
A.调制解调器B.声光调制器C.电荷存储器D.移位存储器