Over the past 10 years, technologies that have combined computers with telephones have developed. Technologies such as PC fax programs and LAN fax servers(局域网传真服务器) have been used to improve fax communications. The latest computer-based technologies are new mechanisms(机制) which use IP(Internet Protocol, 因特网协议) to send faxes, that is, IP fax.

　　Traditional fax has a fairly simple usage model. First, the user inserts a document into the fax machine, enters the destination fax number and presses the start button on the machine. The sending machine dials the receiving fax machine. If it connects, the sending machine scans the documents and sends it over the public switched telephone network(PSTN, 公共电话交换网) to the receiving machine. At the same time, the receiving machine receives the document and then prints it.

　　In IP fax system there are two basic transmission modes: store-and-forward mode and real-time mode. Store-and-forward mode has been widely used. In this mode, the entire document is sent to a network-based server that stores it and then sends it to the destination. Real-time IP faxing is similar to traditional fax. Real-time mode allows two fax machines to directly communicate through a proper standard.

　　IP fax enables a fax document to be sent from one person to another. A fax machine or a computer can be used to send or receive the fax. IP fax also allows e-mail to be used to receive faxes. This would enable users to receive faxes anywhere, anytime with an internet fax address.

　　1. The passage deals mainly with _______.

　　A. PC fax B. IP fax C. information technology D. new machines

　　2. In traditional fax, _______ can be used.

　　A. even computers B. LAN fax servers C. e-mail D. only fax machines

　　3. IP fax can use all of the following to send and receive a fax except _______.

　　A. a fax machine B. a receiving machine C. a computer D. e-mail

　　4. In real-time IP fax mode _______.

　　A. two fax machines communicate directly B. a network-based server is used

　　C. users can receive faxes anywhere D. the PSTN has to be used

　　5. In paragraph 2, the word “inserts” can be placed by _______.

　　A. prints B. presses C. puts D. uses

　　【答案解析】本文介绍了传统的传真和科技的发展带来了现代传真的新特点。

　　1. B。主旨题。根据 The latest computer-based technologies are new mechanisms which use IP to send faxes, that is, IP fax 以及第 3 段中的 In IP fax system there are two basic transmission modes…和第 4 段中的 IP fax enables a fax documents to be sent from one person to another 及后述内容都是展开讲述 IP fax 的有关内容，由此可见 B 为正确答案。

　　2. D。细节题。根据第 2 段 Traditional fax has a fairly simple usage model. First, the user inserts a document into the fax machine,…The sending machine dials the receiving fax machine可知在传统的传真中，仅仅使用普通的传真机，而 A、B、C 是在现代的传真时才使用，故选 D。

　　3. B。细节题。 根据 At the same time, the receiving machine receives the document and then prints it 可知 a receiving machine 仅仅用来接收的，据此选答案 B。

　　4. A。细节题。根据 Real-time mode allows two fax machines to directly communicate through some standard 可知在真实模式下，两台传真机可以直接交流，据此选 A。

　　5. C。词义猜测题。根据 First, the user inserts a document into the fax machine 可知使用者不是把文件打印(A)、挤压(B)、使用(D)而是放入到传真机里，由此选答案 C。