必须获得医疗机构制剂许可证的是（）

A．小型药品批发和零售连锁企业 

B．大型药品批发和零售连锁企业 

C．企业主要负责人 

D．药品零售药店 

E．执业药师

There is no question that computer applications such as (71) , electronic mail, and (72) publishing have changed the way people work. These computer applications have enhanced users capacity for communication and have improved their productivity. The success of these applications has prompted both vendors and researchers to continue to seek new ways to further advance the information technology revolution. Enter the latest innovation: networked (73) systems. They convey information in multiple (74) : text, graphics, video, audio, (75) , computer simulations, and so forth. Advocates of these systems argue that they are the next logical step in human communication; however, modifying our current networks to accommodate the variety of media will present significant technical difficulties.

A．on-desk

B．tabletop

C．desktop

D．table-board