航空是指载人或不载人的飞行器在地球()的航行活动。
A.高空
B.大气层内
C.宇宙
D.大气层外
参考答案:B
The Simple Network Management Protocol (SNMP)is an ()protocol that facilitates the exchange of management information between () . It is part of the Transmission Control Protocol/Internet Protocol (TCP/IP) protocol suite. SNMP enables network () to manage network performance, find and sole network problems, and plan for () . An SNMP-man-aged network consists of three key components: managed devices, () , and network-management systems.
the exchange of management information between()
A.network stations
B.network clients
C.network devices
D.network servers
连接人体体块的连接点有()。
A.三个
B.四个
C.六个
D.八个