股票按股东享有权利的不同，可以分（）。
A．普通股募和优先股票
B．记名股票和无记名股票
C．有面额股票和无面额股票
D．份额股票和比例股票
参考答案：A
（）is a method used in Critical Path Methodology for constructing a project schedule network diagram that uses boxes or rectangles, referred to as nodes, to represent activities and connects them with arrows that show the logical relationships that exist between them.
A．PERT
B．AOA
C．WBS
D．PDM
均热炉要求完全燃烧的目的是为了（）
A.保护环境
B.提高燃料利用率
C.避免造成加热缺陷
