作出反射光线，并标出入射角和反射角．
首先做出法线，根据光的反射定律反射角等于入射角，做出反射光线．故答案为：
义齿设计中使用近中支托和应力中断卡环的目的是（）
A．增加义齿固位
B．方便义齿取戴
C．增加义齿的强度
D．减少基牙的扭力，减轻基牙负荷
E．以上都不是
The wealth of a country should be measured________the health and happiness of its people as well as the material goods it can produce.[ ]
A. by all means
B. in line with
C. in terms of
D. in case of
支托和应力中断卡环的目的是（）