Not only _______interested in Beijing Opera but ______beginning to show an interest in it.

A．the father himself is; all his children are

B．the father himself is; are all his children

C．is the father himself; are all his children

D．is the father himself; all his children are

按最大还款能力计算项目偿债能力时，可以采用 ______指标。

A．投资回收期

B．借款偿还期

C．偿债备付率

D．财务净现值