1、理论分析:
Assume a string s contains x+y characters;
x is the number of Chinese characters;
y is the number of English characters;
LEN(s)=x+y;LENB(s)=2*x+y
x=LENB(s)-LEN(s)
y=2*LEN(s)-LENB(s)
if there is a special character in the string;
can devide the string into two substring;use
this special character.
function:FIND()

2、使用Excel函数演示

3、也可以用于检测单元格中是否含有中文
