=TEXT(RAND()*10^10,"0000000000")&CHAR(INT(RAND()*26+65))&CHAR(INT(RAND()*26+65))&CHAR(INT(RAND()*26+65))&CHAR(INT(RAND()*26+65))
=ROUND((10^10-1-10^9)*RAND()+10^9,)&CHAR(65+26*RAND())&CHAR(65+26*RAND())&CHAR(65+26*RAND())&CHAR(65+26*RAND())
试试这个
把单元格设置成文本