搜题请搜索小程序“爱下问搜题”
问题 单项选择题

无特殊情况下，10kV高压配电装置敷设的控制电缆额定电压，根据规范规定一般宜选用下列哪项数值？（）

A.300/500V

B.450/750V

C.0.6/1kV

D.8.7/10kV

答案

参考答案：B

单项选择题

下列何人提出用大剂量桃仁、红花、降香、失笑散治疗胸痹()

A．张仲景

B．张景岳

C．朱丹溪

D．王肯堂

E．王清任

查看答案
单项选择题

One of the most widely used routing protocols in IP networks is the Routing Information Protocol (RIP). RIP is the canonical example of a routing protocol built on the ___25___ algorithm. Routing protocols in intemetworks differ slightly from the idealized graph model. In an internetwork, the goal of the routers to forward packets to various ___26___.

Routers running RIP send their advertisement about cost every ___27___ seconds. A router also sends an update message whenever an update from another router causes it to change its routing table.

It is possible to use a range of different metrics or costs for the links in a routing protocol. RIP takes the simplest approach, with all link costs being equal ___28___. Thus it always tries to fend the minimum hop route. Valid distances are 1 through ___29___. This also limits RIP to running on fairly small networks.

27（）

A.10 

B.30 

C.60 

D.180
查看答案