What Causes Some People to be Left-handed,and Why Are Fewer People Left-handed than Right-handed?
What Causes Some People to be Left-handed,and Why Are Fewer People Left-handed than Right-handed?
摘要
为什么右手成为大多数人的优势手?为什么左撇子虽然是少数,但依然存在呢?一项医学研究显示,在双亲均为左撇子的家庭,子女是左撇子的机率为50％。另一个证据是,左撇子的比例在某些家族中明显高于一般家族,说明用手的偏爱与遗传直接相关。
出处
《当代外语研究》
2004年第12期9-10,共2页
Contemporary Foreign Language Studies
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