资产负馈率
参考答案:
负债总额与资产总额的比率。
--My father ___________ a letter yesterday, but I’m not sure if he has finished it.
---Why not ask him about it ?
A.wrote
B.was writing
C.has written
D.writes
空泡样脊髓病的特征性症状是()。
A.小脑性共济失调
B.早期出现的痛觉异常
C.进行性痉挛性截瘫
D.早期出现的触觉异常
E.感觉性共济失调