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　incoporporated 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.

（70）处填（）。

A．XML

B．HTML

C．script

D．Web

生产装置使用手持电动工具时必须安装（）。

A、过载保护开关

B、漏电保护开关

C、接地保护开关