公安领导工作，主要是指公安机关首长和人民警察所从事的工作。 ( )
参考答案：错
解析： 公安领导工作，主要是指公安机关首长所从事的工作。
用户提出需求并提供经费，委托软件公司开发软件。但在双方商定的协议中未涉及软件著作权的归属，则软件著作权属于（）所有。
A．软件用户
B．软件公司
C．用户与软件公司共同
D．社会公众
DOM is a platform-and language- (71) API that allows programs and scripts todynamically access and update the content． structure and style of WWW documents(currently，definitions for HTML and XML documents are part ofthe specification)．Thedocument can be further processed and the results of that processing can be incorporated backinto the presented (72) ．DOM is a (73) -based API to documents，which requires the wholedocument to be represented in (74) while processing it．A simpler altemative to DOM is the event—based SAX，which can be used to process very large (75) documents that do not fitinfo the memory available for processing．
A．text B．image C．page D．graphic
