当公司通过债务融资与股权融资两种方式进行融资时，适用加权平均成本。( )
参考答案：对
— When did you finish _____ your homework?
— I finished it at 9:00 last night. [ ]
A. do
B. to do
C. did
D. doing
请简述动平衡试验的基本方法？
