@echo off
(for /l %%i in (1 1 10) do set/p line=)<a.txt
echo %line%
pause
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set/p line=<a.txt
rem 读 a.txt 第一行

(set/p line=
set/p line=)<a.txt
rem 读 a.txt 第二行
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(for /l (9 -1) do set "line="&set/p line=)<a.txt
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(for /l (1 1 10) do set "line="&set/p line=)<a.txt
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(set/p line=
set/p line=
set/p line=
set/p line=
set/p line=
set/p line=
set/p line=
set/p line=
set/p line=
set/p line=)<a.txt
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