研磨机换置新磨轮时,除检查有无裂痕外,应试转多久()
A. 半分钟
B. 1分钟
C. 2分钟
D. 3分钟以上
液压传动可实现无级调速,并且调速范围很大,可达()。
A. 100:l~500:1
B. 100:1~1000:1
C. 100:1~1500:1
D. 100:1~2000:1
FabricPath brings the benefits of routing protocols to layer 2 network Ethernet environments. What are the advantages of using FabricPath technology? ()
A. FabricPath provides MAC address scalability with conversational learning
B. Loop mitigation with TTL in the frame field
C. STPl independence
D. 10 Gbps bandwidth
E. Layer 2 extensions between data center