哪些药物在引起骨骼肌松弛前先有肌束颤搐（）

A.琥珀胆碱

B.阿曲库铵

C.十烃季铵

D.加拉碘铵

E.罗库溴铵

An analyst does research about capital structure. Which of the following is the least appropriate method to estimate the capital structure weights when a company's target capital structure is unknown to analysis

A. Using the book value of capital components.
B. Using industry average capital components.
C. Analyzing trends in capital components to infer the target capital structure.