Soon after the mud-rock flow hit Zhouqu, Gansu Province, many soldiers came to the ______ as many people were trapped underground.

A．shelter

B．identity

C．rescue

D．Disaster

计算机输出的记账凭证，( )必须齐全。

A．表格线

B．汉字输出

C．凭证要素

D．科目和科目代码