题目内容

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

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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

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