无形资产转让的机会成本主要由无形资产的（）构成。
A.净减收益
B.总收益
C.市场收益率
D.再开发净增费用
E.重置成本
参考答案：A, D
On hearing the news, the girl rushed out without hesitation, ______ the luggage ______ on the floor, and ______ in the dark.
A．left, lied, disappeared
B．leaving, lying, disappeared
C．leaving, lie, disappeared
D．left, lay, disappear
分析系统误差、随机误差、粗大误差的特点及其产生原因是什么？
