下列物质的性质中，属于化学性质的是[ ] A．木炭是黑色固体 B．碳酸钠粉末易溶

丹参酮ⅡA的结构是（）

A.A

B.B

C.C

D.D

E.E

DOM is a platform-and language- (1) 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 (2) DOM is a (3) -based API to documents, which requires the whole document to be represented in (4) while processing it. A simpler alternative to DOM is the event-based SAX, which can be used to process very large (5) documents that do not fit into the memory available for processing.

(3)

A．table

B．tree

C．control

D．event

A．

{$mediaurl}
B．

C．

D．

E．

根据验证对象，验证应提出的内容包括

A．起草验证方案、讨论验证方案、修改验证方案、组织实施

B．起草验证方案、审批验证方案、组织实施、写验证报告

C．提出验证项目、制定验证方案、组织施、写验证报告

D．提出验证项目、起草验证方案、审批验证方案、组织实施

E．起草验证方案、审批验证方案、组织实施

设备吹扫时应（）安全阀隔断阀。