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问题 单项选择题

生产者众多，各种生产资料可以完全流动的市场属于（）。

A．完全竞争

B．不完全竞争

C．寡头竞争

D．完全垄断

答案

参考答案：A

解析：

了解行业的市场结构及各类市场的含义、特点及构成。见教材第四章第二节，P142。

单项选择题

TCP/IP (21) layer protocols provide services to the application (22) running on a computer. The application layer does not define the application itself, but rather it defines
(23) that applications need — like the ability to transfer a file in the case of HTTP. In short, the application layer provides an (24) between software running on a computer and the network itself. The TCP/IP application layer includes a relatively large number of protocols, with HTTP being only one of those. The TCP/IP (25) layer consists of two main protocol options — the Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP).

A. application B. sessionC. physical D. transport
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判断题

列入〈出入境检验检疫机构实施检验检疫的进出境商品目录〉内的进口商品，海关在办理通关手续时需加验检验检疫机构签发的〈入境货物通关单〉。（）
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