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Warning: fclose() expects parameter 1 to be resource, bool given in /www/wwwroot/www.wendadaohang.com/inc/function.php on line 2475 出勤率百分比怎么算?列:一个班上有49名学生,每天来的人数都不一样,第一天来46名,第二天就47 - www问答网