检验员的四大职责是:()、()、()、()。
参考答案:鉴别;把关;记录;报告
10BaseT is an Ethernet LAN term meaning a maximum transfer rate of 10Mbps that uses baseband signaling and twisted pair cabling. A 10BaseT Ethernet LAN has a ______ topology.
A.star
B.ring
C.bus
D.none of the above
客房内的“花洒”是属于()。
A.消防监控系统
B.电视监控系统
C.安全报警系统
D.通讯联络系统