．On Sunday he denied all knowledge of it, but on the __________ day he’d admitted to me that he knew all about it.

A．previous

B．former

C．original

D．primitive

信息表达的标准化编码按用途分类，常见编码为（）

A.机内代码

B.辅助录入用代码

C.信息交换用代码

D.树形分类编码

E.混合型编码