如果使用折合页，当折叠时，页码必须是可现的。
A.if you use folding page, the page number must be invisible when folding. B.The page number must be viewing if you fold the page. C.If folded pages are used, the page number must be visible when folded.正确答案C
如果使用折合页，当折叠时，页码必须是可现的。
A.if you use folding page, the page number must be invisible when folding. B.The page number must be viewing if you fold the page. C.If folded pages are used, the page number must be visible when folded.正确答案C
