参考:
Error: extra alignment tab has been changed to cr
Latex: extra alignment tab has been changed to cr 解决方法
复现错误的latex实例：
documentclass{article}
egin{document}
egin{tabular}{c|c}
one & two & three \
hline
one & two
end{tabular}
end{document}
The problem is caused by the extra column you try to insert. The tabular environment expects two columns but three is inserted.
原因是插入了额外的列，或者是因为列数与声明的不一致(egin{tabular}{c|c}).
2017.12