启动dns服务的命令是（ ）。 A: systemctl start dns.service B: systemctl start unbound.service C: systemctl status dns.service D: systemctl status unbound.service

The plot of Prometheus Unbound takes its origin from The Bible.

The story of Shelley's Prometheus Unbound was taken from Roman mythology. （)

​Which of the following is NOT true of Prometheus Unbound?‎ A: Prometheus has stolen the fire from Heaven. B: Prometheus is punished by Zeus. C: With the others’ help, Prometheus is unbound and freed. D: Prometheus finally reconciles with Zeus.

以下对Unbound DNS服务器的描述，正确的是（ ）。

Linux.系统的 Unbound 程序能提供的DNS服务器有（ ）。

【单选题】Which service is not the service in housekeeping department? A. Laundry service B. turn-down service C. morning call service D. luggage service

Which of the following is mandatory service of Inmarsat-C system? A: SafetyNET service B: FleetNET service C: Short range service D: Long range service

New service development needs to consider both service content and service process.

（）：a cloud service,allied to the set of business terms under which the cloud service is offered. A: Cloud service B: Cloud service product C: Product catalogue D: Service catalogue