患者，男性，49岁，缺失，余留牙无松动，不正确的说法是（）

A．上颌为Kennedy第三类第一亚类牙列缺损

B．可采用后腭杆前腭板相连的设计

C．可采用前腭板的设计

D．上设卡环

E．设支托

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.

（69）处填（）。

A．document

B．processor

C．disc

D．memory