【问题2】
请根据Redhat Linux 9.0操作系统的提示信息，将以下(3)空缺处的Apache服务操作命令填写完整。
[root@gcz root]# service httpd start
[root@gcz root]# (3)
【供选择的答案】

• A．service httpa restart
• B．service httpd status
• C．httpd -k start
• D．apachectl start

Network managers have long (140) practical voice-over-IP (VOIP) solutions. VOIP (141) ease network management and decreases costs by converging a company’s telephony and data infrastructures into one network. And a VOIP solution implemented at a company’s head-quarters with far-reaching branch offices can (142) tremendous amounts of (143) in long distance phone bills, provided that solution delivers POTS-like voice (144) over the Internet.

A．await

B．awaited

C．awaiting

D．awaits