防毒面具选定、灭菌后,头带式面具还要细致地调好头带。
参考答案:对
发现电磁感应现象的物理学家是( )
A.牛顿
B.奥斯特
C.法拉第
D.瓦特
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) 。
29()
A. waterfall model
B. workflow reference model
C. evolutionary model
D. spiral model