16．There are many colors in nature．But do you think that a color has weight？I think you'll．But I'm afraid you are wrong．If you don't believe it，you may do a small experiment（实验）． First，put two objects with the same weight into two boxes．Then cover the boxes． Third，wrap（包裹）one box with a red piece of paper，the other one with a white piece of paper．OK．Now hold the boxes with your hand one by one．It is certain that you will think the red one is a little heavier． Why do you think so？A scientist found that different colors have different weights in man's mind．That is to say，every color has its own weight in our mind． The scientist told us that colors also have smell．Can you smell the color？Of course not．Then why did the scientist say so？That is because every color stands for （代表） a kind of light with a certain wavelength（波长）．It reaches our brain through sense organs．According to this discovery，scientists say that people accept the colors they like，and refuse the colors they hate．So your body and mind will be healthy by using the colors you like．Or you'll be nervous or even get ill．For erample （例如），you like blue and hate red．If you stay in a room with red windows，wallpaper and furniture（家具） for two hours，you'll feel you have been there for four hours．But if the room is blue，you'll feel you have been there for only an hour．And，if a person walks out of a blue room and into a red room，his temperature will rise． That means our body temperature will change with different colors．
51．From the experiment，we know thatD A．the two boxes have the same weight B．colors can change the weight of an object C．the red paper is heavier than the white paper D．colors have different weights in people's mind 52．From the fourth paragraph，we can infer（推断）B． A．the smell of colors is changeable（可变的） B．people can sense the light from colors C．people can smell the colors through the nose D．all the colors have the same smell for the blind 53．Which of the following is true？D． A．White color is heavier than red color B．People may get ill if they refuse the colors they don't like C．People can stay longer in red rooms than in blue rooms D．People's body temperature will change with different colors 54．We can infer from the last paragraph thatD． A．red color is bad for our health B．people may get nervous in a red room C．blue color can raise（提升）our body temperature D．colors can influence our mood（情绪）and health 55．The passage is probablyC． A．a short novel B．a news report C．a science report D．an advertisement．
