twice a year, whether it is a car or a bus or a truck, is the rule that every driver must obey in this city.

A．Examining

B．Examined

C．Being examined

D．Having been examined

关于VEP描述正确的是（）.

A.一侧视神经损害是全视野、半视野刺激均显示异常，而刺激健眼时正常

B.视交叉部位病变则两颞侧半视野刺激时VEP异常

C.视束及枕叶病变，对侧半视野刺激时VEP异常

D.视交叉部位病变则两鼻侧半视野刺激时VEP异常

E.视束及枕叶病变，同侧半视野刺激时VEP异常