CrLf

@echo off
findstr /n .* 1.txt>tmp1
find /n /v "" <2.txt>tmp2
(for /f "tokens=2*delims=]:" %%a in ('fc /lb1000 /n tmp1 tmp2^|sort') do (
   if not defined . (
      set /p=%%b<nul
      set .=.
   ) else (
      set .=
      echo; %%b
   )
))>合并.txt
del /q tmp?
pause
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CrLf

笔误，已修改