在励磁一位提主手柄卸载灯灭机车无流无压时以下不属故障范围的是()。
A. 11DZ跳开
B. 1ZJ故障
C. 励磁转换开关故障
查看答案
同时具备12个千兆光口、12个千兆电口和4个万兆口的盒式无线控制器是()。
A. WX6103
B. WX5540E
C. WX6103E
D. WX5510E
压力管道维修过程中,清洗和吹扫管道时,如果介质为强碱性介质可用()冲洗。
A. 强酸性液体
B. 若酸性液体
C. 大量水
D. 有机溶液
Which two statements are true about RSVP and the InServ QoS model?()
A. a drawback of implementing RSVP is the requirement to migrate to a supporting routing protocol
B. RSVP uses DSCP to signal QoS requirements to routers
C. RSVP is a routing protocol
D. RSVP is an IP protocol that uses IP protocol ID 46, and TCP/UDP ports 3455
E. RSVP specifically provides a level of service for rate-sensitive and delay-sensitive traffic
F. the flow-based approach of RSVP is ideal for large, scalable implementations such as the public internet
ZPW-2000A型轨道电路机械绝缘节空心线圈和电气绝缘节空心线圈可以通用。
A. 正确
B. 错误