=IF(A1="","",IF(B1="",TEXT(IF(B1>0,NOW(),""),"yyyy-m-d h:m"),B1)) =IF(A1="","",IF(B1="",TEXT(IF(B1>0,NOW(),""),"yyyy-m-d h:m"),B1))

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=IF(A1="","",IF(B1="",TEXT(IF(B1>0,NOW(),""),"yyyy-m-dh:m"),B1))=IF(A1="","",IF(B1="",TEXT(IF(B1>0,N

=IF(A1="","",IF(B1="",TEXT(IF(B1>0,NOW(),""),"yyyy-m-d h:m"),B1)) =IF(A1="","",IF(B1="",TEXT(IF(B1>0,NOW(),""),"yyyy-m-d h:m"),B1))
=IF(A1="","",IF(B1="",TEXT(IF(B1>0,NOW(),""),"yyyy-m-d h:m"),B1))
=IF(A1="","",IF(B1="",TEXT(IF(B1>0,NOW(),""),"yyyy-m-d h:m"),B1))

=IF(A1="","",IF(B1="",TEXT(IF(B1>0,NOW(),""),"yyyy-m-d h:m"),B1)) =IF(A1="","",IF(B1="",TEXT(IF(B1>0,NOW(),""),"yyyy-m-d h:m"),B1))
如果A1为空,择本格也为空,如果A1不空,B1空且当B1>1时显示当前时间,当B1