漏电只会导致人体触电,和引起瓦斯、煤尘爆炸没有关系。()
参考答案:错
对列车运行有直接影响的力有机车牵引力、列车运行阻力和()。
A、列车制动力
B、空气阻力
C、温度阻力
D、摩擦力
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