如果右侧视神经损伤，两眼的瞳孔对光反射有何变化？
参考答案：右眼：直接对光反射消失；间接对光反射均存在 左眼：直接对光反射存在；间接对光反射均消失
试比较裸子植物和双子叶植物茎的次生结构。
Woman: Is the rescue crew still looking for survivors of the plane crash Man: Yes, they have been searching the area for hours, but they haven’t found anybody else. They’ll keep searching until night falls. Question: What do we learn from the conversation（）。
A. All the passengers were killed.
B. The plane crashed in the night.
C. No more survivors have been found.
D. It’s too late to search for survivors.
