无形资产
参考答案：
无形资产是指由特定主体控制的不具有独立实体，而对生产经营长期发挥作用并能带来经济收益的经济资源。
— You________have finished your composition.
— I had meant to, but before I could, the bell rang and we had to hand in our test papers. [ ]
A. were supposed to
B. were able to
C. had to
D. were determined to
工程建设的不同阶段对工程项目质量的形成起着不同的作用和影响，决定工程质量的关键阶段是( )。
A．可行性研究阶段
B．决策阶段
C．设计阶段
D．保修阶段
