Outlook Express5中不能插入（）类型的超级链接。
A、mailto
B、ping
C、ftp
D、telnet
参考答案：B
Tony was caught at the meeting, which annoyed his boss.
A．chatting
B．chat
C．chatted
D．to chat
光纤是绝缘体，不受任何外部电磁波的干扰。( )
