题目

Look at the center circles of Diagram A and Diagram B. Which of the centre circles looks larger? In Diagram B? In fact, theyare exactly the same size.          Then look at the picture on the right. What do you see? A vase? Or two faces？Does the picture change quickly from one to the other again and again? Maybe or maybe not, but you can never see them at the same time. “What’s happening? Is something wrong with my eyes?” You may wonder at what you see. Don’t worry. Here is how it goes: When we look at things, our eyes send messages to our brains and then our brains i100个0.001是（　　）A. 10B. 1C. 0.1D. 0.01