题目内容
AJAX is an advanced use of JavaScript that is used to create interactive websites that respond quickly.
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Client-based e-mail accounts require a special program called an e-mail client to be installed on your computer.
Attachments to e-mail messages can be a document or an image.
The CAN-SPAM Act has proven to be more effective than spam blockers at preventing unwanted e-mail.
Instant messaging allows text only.
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