当有中断申请信号输入后，可编程序控制器中断正在执行的相关程序而转向执行（）
A、查询子程序
B、扫描子程序
C、中断子程序
D、定时子程序
参考答案：C
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
1916年5月，德国海军某舰队在遭遇英国海军舰队时，试图迅速通知远在40海里外的德国海军主力舰队前来增援，应该选择的通讯方式（）
A.有线电报
B.电话
C.无线电报
D.信件传递
