I have this CD player for a year. [ ]
A. has
B. bought
C. had
D. buy
答案:C
利用非对称数字用户环路实现宽带接入互联网的技术是()。
A.ISDN
B.ADSL
C.CableModem
D.Power-lineNetwork
地跨北方地区、南方地区、西北地区、青藏地区的省是()。
A.青海
B.四川
C.陕西
D.甘肃