医师为患者选择的人工牙，其上中切牙有以下特征：牙颈部略宽，近中面微凸，远中面的切1／2较凸，唇面较圆凸，两切角较圆钝

此型人工牙最适合于（）

A.尖形颌弓的无牙颌患者

B.方形颌弓的无牙颌患者

C.下颌前突型颌弓的无牙颌患者

D.卵圆形颌弓的无牙颌患者

E.下颌后缩型颌弓的无牙颌患者

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 into the memory　available for processing.

66（）

A．specific　　　

B．neutral　

C．contained　　

D．related