单项选择题
A user can send e-mail， but cannot receive any e-mail. Which of the following settings should be verified in the e-mail account？（）
A.MAC address B.TCP/IP address C.POP Server settings D.SMTP Server settings
单项选择题 InWindows2000，whereshouldyougotojoinaworkgroupordomain？（）
单项选择题 WhenmakingaserialconnectionbetweentwoWindows2000machines，whichtypeofcableisneededforpropercommunications？（）
单项选择题 WhichsystemisusedtoresolvenamesontheInternet，suchascomptia.org，toIPaddresses？（）
