[名词解释] 围生期(perinatalperiod)

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"] 学龄前期(preschoolage) 学龄期(schoolage) 青春期(adolescence) 围生期(perinatalperiod)