[名词解释] 儿科学(pediatrics)

婴儿期(infancy) 幼儿期(toddler’sage) 正常室间孔呈() ["A．“Y”字形","B．方形","C．长方形","D．三角形","E．梭形"] 面神经管分() ["A．2段","B．3段","C．4段","D．5段","E．6段"] 学龄期(schoolage) 儿科学(pediatrics)