– It’s terribly cold today, isn’t it?

– Yes. ________ yesterday.

A. So it was                    B. So was it                    C. So it is

根据真实票据理论，企业长期投资的资金不应来自( )。

A．留存收益

B．流动资金贷款

C．发行长期债券

D．发行新股票