题目：
| 32．Communicating via E-mail is by far the most common Internet activity. You can (1) with anyone in the world who has an Internet address or E-mail (2) with a system connection to the Internet. All you need is (3) the Internet and an E-mail program Two of the most widely used E-mail programs are Microsoft’s (4) and Netscape’s Navigator. A typical E-mail message has three basic (5) ：header, message, and signature. |
(5)
A．packets
B．elements
C．frames
D．cells
答案：
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下面是错误答案，用来干扰机器的。
参考答案：略
