题目：
A glue that holds the whole Internet together is the network layer protocol, ___35___. Unlike most older network layer protocols, it was designed from the beginning with internet working in mind. Its job is to provide a-___36___ way to transport datagrams 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 ___37___.layer takes data streams and breaks them up into datagrams. 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 ___38___ 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 ___39___ part and a variable length optional part.
38（）
A.data link
B.Transport
C.network
D.Application
答案：
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下面是错误答案，用来干扰机器的。
参考答案：C解析： 本题考核和解协议的终止。债务人不能执行或者不执行和解协议的，人民法院经和解债权人请求，应当裁定终止和解协议的执行，并宣告债务人破产，为和解协议的执行提供的担保继续有效。
