题型:选择题 This is the _____ time in _____ days that he has made the same mistake.[ ]A. second, thirdB. two, threeC. two, thirdD. second, three 查看答案
题型:单项选择题 连接美国东西海岸的Abilene网开始启用,它将成为新一代Internet应用与服务的试验基地,到99年2月止,已连接了70多所大学,传输速率达()。A.56KB.100MC.2.4GD.10G 查看答案