四年级的

That to know by the somatotype transformed, one grade raised to 3rd grade, ectomorph type trend to Mesomorph type or Endomorph type, Until 4th grade trend to Ectomorph type or Mesomorph type. 4.

㈢罗列指数的变化，了解学生成长的体型变化，级至三级时，从瘦长型适中型、肥胖型，至四级则瘦长型、适中型的体型。