Mr. Smith was thinking about how to explain to the manager why he was late for work, when a good idea ______ to him.  

A．happened

B．brought

C．occurred

D．struck

当手动设置TCP/IP协议的属性时，需要指定3个IP地址，即本机地址， (248) 地址和 (249) 的地址。

A．远程服务器
B．交换机
C．TCP服务器
D．默认网关