The advantage of sales promotion is that they are not too expensive for the company when compared with _________ advertising mediums like Television or newspaper.
【简答题】● 常用的网络地址有 A、B、C 三类。一个 B 类网络最多可以包含 (30) 主机,B类网络默认的子网掩码是(31) 。 (30) A. 1600万个 B. 6万多个 C. 300个 D. 254个 (31) A. 255.0.0.0 B. 255.255.0.0 C. 255.255.252.0 D. 255.255.255.0