2. 计算机
  3. In the following essay, each blank has four choices. Choose the most suitable one from the four choices and write down in the an

In the following essay, each blank has four choices. Choose the most suitable one from the four choices and write down in the an

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问题 In the following essay, each blank has four choices. Choose the most suitable one from the four choices and write down in the answer sheet.
A socket is basically an end point of a communication link between two applications. Sockets that extend over a network connect two or more applications running on(66)computers attached to the network. A socket(67)two addresses:(68). Sockets provide a(69)communication channel between one or more systems.
   There are(70)sockets separately using TCP and UDP.
选项 A、is made of
B、composed of
C、is composed of
D、is consisted of
答案C
解析
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