三果眼益：依据屈光成分可分为轴性近视和屈光性近视

依据屈光成分可分为轴性近视和屈光性近视。轴性近视为最常见，眼球前后径过长（即眼轴长度超出正常范围），而屈光力（即角膜和晶状体等眼其他屈光成分的屈光性能）基本在正常范围。屈光性近视主要由于角膜或晶状体曲率过大，或各屈光成分之间组合异常，导致屈光力超出正常范围，而眼轴长度基本在正常范围。

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张可哑2433按轴的承载情况,轴分为那三类?简述轴的承载状况 -
山吕尤17191734112 ______ 心轴,转轴,传动轴 心轴——只受弯矩不受扭矩,转轴——既受弯矩又受转矩,传动轴——只受转矩不受弯矩.

张可哑2433轴线可分为哪三种
山吕尤17191734112 ______ 轴线可分为三大类,分别是摄影轴线、制图轴线、建筑轴线.在一场戏的镜头调度中,摄像机位置的变动范围,相邻镜头的拍摄角度,受轴线的制约.否则给后期剪辑工作造成困难.在平面制图中,为主体元素定位的参照线也叫轴线.众多轴线组成轴网,轴线用轴号来命名.《建筑大辞典》中对于轴线有如下解释,轴线与中心相并列,是最基本的形态秩序之一.可以发现,轴线适用于各种各样的阶段之中.环境中的各种轴线作都是轴线在环境设计领域中的应用.