题目

阅读理解Will it matter if you don't take your breakfast? Recently a test was given in the United States. Those tested included people of different ages, from 12 to 83. During the experiment, these people were given all kinds of breakfasts, and sometimes they got no breakfast at all. Special tests were set up to see how well their bodies worked when they had eaten a certain kind of breakfast. The results show that if a person eats a proper breakfast, he or she will work with better effect than if he or she has no breakfast. This fact appears to be especially true if a person works with his 14．建筑物在湖中的“倒影”是由光的反射所形成的虚像（选填“实像”或“虚像”）．湖中的“倒影”比建筑物暗的原因是由于光的折射现象，教室里不同位置上的同学都能看到黑板上的粉笔字，这是由于光的漫反射现象（选填“漫反射”或“镜面反射”）