突然视力下降伴眼痛的眼病有（）
A.急性色素膜炎
B.缺血性视神经病变
C.玻璃体出血
D.弱视
E.急性闭角型青光眼
参考答案：A, E
A．She’d like to have the windows open.
B．She likes to have the air conditioner on.
C．The air is heavily polluted.
D．The windows are already open.
数控机床有哪几种分类方法
