北京奥运火炬接力以“和谐之旅”为主题，以“点燃激情传递梦想”为口号，前往五大洲（

制作一个面积为1 m²，形状为直角三角形的铁架框，有下列四种长度的铁管供选择，较经济的（既够用又耗材量少）是（　　）．

A．5.2m

B．5m

C．4.8m

D．4.6m

运行中的变压器，常见的铁芯故障有哪些

根据《机动车排放污染防治技术政策》，2005年前后柴油车达到( )。

A．相当于欧洲第一阶段水平1
B．相当于欧洲第二阶段水平2
C．相当于欧洲第二阶段水平3
D．相当于欧洲第一阶段水平4

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

弗洛伊德的人格结构理论。