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问题 判断题

Text A Leben und Tun

Er will jetzt mit der Kamera nur die Unzufriedenheit der Menschen zeigen.

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参考答案：错

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 ___44___ of passing through each network is the same; it is one ___45___ 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 ___46___ through a network can have different costs (metrics). For example, if maximum ___47___ is the desired type of service, a satellite link has a lower metric than a fiber-optic line. On the other hand, if minimum ___48___ 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.

45（）

A．flow

B．hop

C．process

D．route
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问答题 简答题

在甲醇精馏中，提高粗甲醇的水分，工艺参数有何变化？
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