来自刘治军的问题
【英语类英数题（意思）3tractorscanplough90000squaremetersoffieldswithin3days,accordingtothiscalculculation,howmanysquaremetersoffieldscan5tractorsploughin6days?】
英语类英数题（意思）
3tractorscanplough90000squaremetersoffieldswithin3days,accordingtothiscalculculation,howmanysquaremetersoffieldscan5tractorsploughin6days?
