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发布时间：2006-06-28 02:18     点击：

　　　　　C．255.255.252.0　　　　　　　　　　D．255.255.0.0

　　（65) A．254　　　　　　B．512　　　　　　C．1022　　　　　　D．1024

　　● DOM is a platform-and language-____(66)___API that allows programs and scripts　to dynamically access and update the content, structure and style of WWW documents　(currently, definitions for HTML and XML documents are part of the specification). The　document can be further processed and the results of that processing can be incorporated back into the presented ___(67)____.DOM is a ___(68)___-based API to　documents ,which requires the whole document to be represented in ____(69)___while　processing it .A simpler alternative to DOM is the event –based SAX, which can be　used to process very large ___(70)___documents that do not fit info the memory　available for processing.

　　（66）A．specific　　　B．neutral　　　　C．contained　　　　D．related

　　（67）A．text　　　　　B．image　　　　　C．page　　　　　　 D．graphic

　　（68）A．table　　　　 B．tree　　　　　 C．control　　　　　D．event

　　（69）A．document　　　B．processor　　　C．disc　　　　　　 D．memory

　　（70）A．XML　　　　　 B．HTML　　　　　 C．script　　　　　 D．web

　　● Melissa and Love Letter made use of the trust that exists between friends or colleagues.　Imagine receiving an __(71)___from a friend who asks you to open it.　This is what happens with Melissa and several other similar email __(72)___.Upon　running ,such worms usually proceed to send themselves out to email addresses from the victim's address book, previous emails, web pages__(73)___.

　　As administrators seek to block dangerous email attachments through the recognition of well-known ___(74)____,virus writers use other extensions to circumvent such protection.　Executable (.exe) files are renamed to .bat and .cmd plus a whole list of other extensions and will still run and successfully infect target users.

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