The book, ____ are true stories about great scientists of the 20^th century, is well worth reading.

A．which

B．what

C．in which

D．of which

在会计核算中款项是指作为支付手段的货币资金，下列各项中属于款项的有( )。

A．现金

B．银行存款

C．信用证存款

D．备用金