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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 我想问下我三年级数学全年级第二,全班第一,听说这个阶段是具体逻辑思维,到四年级是向抽象逻辑思维? - 88问答网