- 问题详情:Babygirlsmaketheirwaydirectlyfordollsassoonastheycancrawl(爬),whileboyswillheadforthetoycars,astudyhasshown.Thefindings—thefirsttoshowdifferencesinveryyoungbabies—suggestthereisabiologicalbasistotheirpreferences.PsychologistsDrBrendaToddcar...
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