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问题 单项选择题

采取企业联合广告、联合展销，以较少的促销费用，取得较大的促销成果，这是（）。

A.企业联合促销法

B.保质取信促销法

C.示范表演促销

D.购物有奖促销法

答案

参考答案：A

问答题 简答题

吸、排气阀有敲击声是怎么回事？
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单项选择题

The metric assigned to each network depends on the type of protocol.Some simple protocol, like RIP, treats each network as equals. The（1） of passing through each network is the same; it is one（2）count. So if a packet passes through 10 network to reach the destination, the total cost is 10 hop counts. Other protocols, such as OSPF, allow the administrator to assign a cost for passing through a network based on the type of service required. A （3） through a network can have different costs (metrics). For example, if maximum（4） is the desired type of service, a satellite link has a lower metric than a fiber-optic line. On the other hand, if minimum（5）is the desired type of service, a fiber-optic line has a lower metric than a satellite line. OSPF allow each router to have several routing table based on the required type of Service.

（2）是（）

A.process

B.hop

C.route

D.flow
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