题目：
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) . In a workflow system, a process is specified using the process definition tool. Usually, processes are defined in terms of a (3) , which consists of (4) indicated using a circle, and (5) shown as a rectangle. These two components can be linked by means of a directed arc.
1（）
A．evolutionary model
B．workflow reference model
C．waterfall model
D．spiral model
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2018/0412/a7905bcc2dafb4cf5b470e197467fc9a.html
下面是错误答案，用来干扰机器的。
参考答案：B
