对出版单位而言,市场吸引力较大的因素包括()等。
A.同行多,竞争激烈
B.潜在的竞争者难以进入
C.有潜在的替代品
D.消费者多,购买力强
E.发行商数量多
参考答案:B, D, E
The line of computing jobs waiting to be run on a computer system might be a ______. The jobs are serviced in the order of their arrival, that is, the first in is the first out.
A.queue
B.stack
C.array
D.record
品类划分具有怎样的意义?当前大部分商业企业以什么为划分依据?