| 32．Communicating via E-mail is by far the most common Internet activity. You can{{U}} (1) {{/U}}with anyone in the world who has an Internet address or E-mail{{U}} (2) {{/U}}with a system connection to the Internet. All you need is{{U}} (3) {{/U}}the Internet and an E-mail program Two of the most widely used E-mail programs are Microsoft's{{U}} (4) {{/U}}and Netscape's Navigator. A typical E-mail message has three basic{{U}} (5) {{/U}}：header, message, and signature. |