上向流斜管沉淀池tube settler
参考答案：
池内设置斜管，水自下而上经斜管进行沉淀，沉泥沿斜管向下滑动的沉淀池。
—Would you like ______ orange?
—______ [ ]
A. some; Well.
B. many; No, thanks.
C. some; Yes, please.
D. any; Nice.
The (29) 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 (30) 。
30（）
A. workflow engines
B. processes
C. workflow threads
D. tasks
