下列关于施工组织设计技术经济分析方法的叙述，正确的是( )。

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问题单项选择题

A．定性分析法既简便又不易受主观因素制约

B．价值法、评分法都属于多指标的定量分析法

C．价值法需经专家采用加权系数计算

D．评分法需经计算各方案的总价值后评定优劣

答案

参考答案：B

单项选择题

A glue that holds the whole Internet together is the network layer protocol, (1) .Unlike most older network layer protocols, it was designed from the beginning with internetworking in mind. Its job is to provide a (2) way to transport data grams from source to destination, without regard to whether these machines are on the same network or whether there are other networks in between them.

Communication in the Internet works as follows. The (3) layer takes data streams and breaks them up into data grams. Each datagram is transmitted through the Internet, possibly being fragmented into smaller units as it goes. When all the pieces finally get to the destination machine, they are reassembled by the (4) layer into the original datagram. This datagram is then handed to the transport layer, which inserts it into the receiving process’ input stream.

An IP datagram consists of a header part and a text part. The header has a (5) part and a variable length optional part.

4（）

A．data link

B．transport

C．network

D．application

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名词解释

自残断尾现象

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