单项选择题
A.10MpbsB.8MpbsC.5MpbsD.50Mpbs
A.1KM B.2KM C.4KM D.5KM
A.http：//iposs.jsinfo.net/liposs/login.jsp B.http：//js.bnet.cn/ C.http：//202.102.13.123：7001/login.jsp D.http：//edu.lyg.jsinfo.net/