信管网章节习题

 The （1） is a  general description of the architecture of a workflow management system  used by  the WFMC, in which  the main components and  the associated interfaces are summarized. The workflow enactment service is the heart of a workflow system which consists of several （2）. 
 （1）A. waterfall model                      
B. workflow reference model 
C. evolutionary model                   
D. spiral model 
（2）A. workflow engines                     
B. processes 
C. workflow threads                     
D. tasks