- 问题详情:Traditionhasitthatboysaregoodatcountingandgirlsaregoodatreading.SomuchsothatMattelonceproducedatalkingBarbiedollwhosestockofphrasesincluded“Mathclassistough!” Althoughmuchismadeofdifferencesbetweenthebrainsofadultmalesandfemales,thesourc...
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