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## 编译环境
操作系统
* [x] Windows 7/8/10
* [ ] macOS
* [ ] Linux
`若需勾选，请把[ ]改成[x]`
Tex发行版
* [ ] TexLive `年份`
* [x] MikTeX `4.0.1`
* [ ] CTeX
`若需勾选，请把[ ]改成[x]`
## 我的问题
cls文件报错
以下是4个错误的描述
! Undefined control sequence.
\LaTeX3 error:
Use \str_if_eq:eeTF not \str_if_eq_x:nnTF depreca...
l.140 }
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.
-----------------------------------------------------
! LaTeX Error: Missing \begin{document}.
See the LaTeX manual or LaTeX Companion for explanation.
Type H for immediate help.
...
l.140 }
You're in trouble here. Try typing to proceed.
If that doesn't work, type X to quit.
---------------------------------------------------
! Undefined control sequence.
\LaTeX3 error:
Use \str_if_eq:eeTF not \str_if_eq_x:nnTF depreca...
l.140 }
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.
----------------------------------------------------
! Undefined control sequence.
\LaTeX3 error:
Use \str_if_eq:eeTF not \str_if_eq_x:nnTF depreca...
l.140 }
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.
Package fontspec Info: Font family 'TimesNewRoman(0)' created for font 'Times
