题目

如图所示，一束光线经平面镜反射后，过凸透镜的焦点F射向凸透镜，请在图中画出射向平面镜的入射光线和经凸透镜后的折射光线，并标出入射角的度数． 答案：解：如图所示：In recent years travel companies have succeeded in selling us the idea that the further we go，______.A. our holiday will be better B. our holiday will be the betterC. the better our holiday will be D. the better will our holiday be