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
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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
按信息()划分,可分为语音信息、文字信息、数据信息、图像信息、视频信息等。
A. 交流方式
B. 运行状态
C. 内容
D. 表现形式