题目

Scientists are making new study of color and its effects on our health. They have known for a long time that the color of a room or the color of the light in it can affect our feelings. Many prisons and hospitals have at least one room that is painted pink. Officials have found that putting an angry screaming person into a pink room has a calming effect . Scientists also have found that light and color can produce physical changes in our bodies. Professor Falfan worked with the group of  9 disabled children at the school in Albert. Two of the children were blind . The other seven had n下列物质一定属于有机合成材料的是A．塑料           B． 橡胶      C．纤维          D．钢铁