题目内容
JavaScript is a language often used within HTML documents to trigger interactive features.
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Cascading Style Sheets (CSS) are files inserted into an HTML document that control the appearance of web pages including layout, colors, and fonts.
AJAX is an advanced use of JavaScript that is used to create interactive websites that respond quickly.
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.
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