在运动的合成和分解的演示实验中,红蜡块在长为1m的玻璃管中沿Y方向做匀速直线运动,现在某同学拿着玻璃管沿X方向做匀加速直线运动,请在图5中定性地画出红蜡块的运动轨迹。
各级公安机关和民警要善于从政治上考虑问题,判断形势,增强( ),在事关全局、事关政治方向、事关根本原则等重大问题上始终保持清醒和坚定。
A.政治敏锐性 B.政治鉴别力C.政治敏锐性和政治鉴别力 D.政治警惕性
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.
A.document
B.processor
C.disc
D.memory