数据流程图由四种基本符号组成,分别是外部实体、数据流、()和数据存储。
After listening to Mr. Sheet’s report, ()
A. afewchangesweremadebythemanager
B. themanagermadeafewchanges
C. themanagermakesafewchanges
D. afewchangesaremadebythemanager
Sales representative Mailer made more telephone calls last month ()salespersons.
A. thanother
B. thanany
C. thananyother
D. asanyother
目前应用最普遍、最成熟的信息系统开发方法是()开发方法。