What is the basic theory of psychoanalysis
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胎儿身体纵轴与母体纵轴的关系称为
A. 胎产式
B. 胎方位
C. 胎先露
D. 胎体势
E. 骨盆轴
嵌合型Down综合征
A. 核型46，XX(XY)，-14，+t(14q21q)
B. 核型46，XX(XY)，-21，+t(21q21q)
C. 核型47，XX(XY)，+21
D. 核型45，XO
E. 核型46，XX(XY)/47，XX(XY)+21
What is Chomsky’s explanation of the first language process
What did Richard Byrd do to become a famous explorer
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