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1.How to Insert a Style Sheet (1).External Style Sheet An external style sheet can be written in any text editor. The file should not contain any html tags. Your style sheet should be saved with ... 阅读全文
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1.Instruction (1)What is CSS? CSS stands for Cascading Style Sheets Styles define how to display HTML elements Styles are normally stored in Style Sheets Styles were added to HTML 4.0 to solve a pro... 阅读全文
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7.XHTML Standard Attribute XHTML tags can have attributes. The special attributes for each tag are listed under each tag description. The attributes listed here are the core and language attributes ... 阅读全文
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4.XHTML DTD The XHTML standard defines three Document Type Definitions. The most common is the XHTML Transitional. The 3 Document Type Definitions DTD specifies the syntax of a web page in SGML. DTD ... 阅读全文
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1.Introduction To XHTML (1)What Is XHTML? XHTML stands for EXtensible HyperText Markup Language XHTML is aimed to replace HTML XHTML is almost identical to HTML 4.01 XHTML is a stricter and cleaner ve... 阅读全文
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1.SQL statements are not case sensitive. SELECT is the same as select. 2. SELECT Statement Syntax: SELECT column_name(s) FROM table_name SELECT LastName,FirstName FROM Persons SELECT * FROM Perso... 阅读全文
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1.What is SQL
SQL is an ANSI (American National Standards Institute) standard computer language for accessing and manipulating database systems. SQL statements are used to retrieve and update data in ... 阅读全文