BAT怎么批量刪除文本指定行冒號后的內容BAT怎么批量刪除文本指定行冒號后的內容如：aa文件夾下有成千上萬的文件文件內容：1.aaaaaa:aaaaaa2.aaaaaaaaaaaa3.aaaaaaaaaaaaa4.aaaaa:aaaaaaaaaaa5.aaaaaaaaaaaa6.aaaaaaa.aaaaaaaaaaaa7.aaaaa,aaaaaaaaaaaaaaa8.aaaaaaaa:aaaaaaaaaaa9.aaaaaaaa,aaaaa假如刪除第四行冒號后的內容bat運行后內容改為：1.aaaaaa:aaaaaa2.aaaaaaaaaaaa3.aaaaaaaaaaaaa4.aaaaa5.aaaaaaaaaaaa6.aaaaaaa.aaaaaaaaaaaa7.aaaaa,aaaaaaaaaaaaaaa8.aaaaaaaa:aaaaaaaaaaa9.aaaaaaaa,aaaaa