我国国有企业改革的方向和目标是：
A．建立现代企业制度B．解决企业内在机制C．改善企业外部环境D．解决历史遗留问题
参考答案：A
两位置转换开关的（）鼓用于实现机车牵引与电阻制动工况之间的转换。
Reviewing work products and results to ensure that all were completed satisfactorily and formally accepted is part of ______ .
A．risk management
B．quality control
C．change control management
D．verify scope
