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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 有一块梯形菜地如右下图分别种萝卜和白菜,如果每平方米种6棵白菜,可种白菜多少棵?每棵萝卜占地9平 - 22问答网