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问题 多项选择题

旅游者作为一种特殊的社会活动群体和经济活动群体，表现出了哪些共同的特点（）

A、异地性

B、消费性

C、休闲性

D、体验性

E、盈利性

答案

参考答案：A, B, C, D

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单项选择题

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 (31) computers attached to the net-work. A socket (32) two addresses: (33) . Sockets provide a (34) communication channel between one or more systems. There are (35) sockets separately using TCP and UDP.

（32）是（）

A. is made of

B. composed of

C. is composed of

D. is consisted of
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