3. Who were the ancestors of the English and the founders of England?
A. the Anglo-Saxons
B. the Normans
C. the Vikings
D. the Romans
将下列IT基础设施的演变时代,从最早到最近进行排序:①云计算时代;②客户端/服务器时代;③企业计算时代;④个人电脑时代;⑤主机和小型计算机时代
A. ④, ⑤, ③, ②, ①
B. ⑤, ④, ②, ③, ①
C. ④, ⑤, ②, ③, ①
D. ⑤, ④, ②, ①, ③