The new books ________ in the factory these days are mainly intended for children.

A．printing

B．to print

C．being printed

D．to be printed

记账凭证汇总表核算形式下，登记总账的直接依据是( )。

A．付款凭证

B．记账凭证汇总表

C．记账凭证

D．收款凭证