Why is pink or purple a color for girls and blue or brown for boys'?
The answer depends largely on cultural values as well as personal experiences. To the Egyptians, green was a color that represented the hope and joy of spring, while for Muslims, it means heaven. Red is a symbol of good luck in many cultures. In China, children are given money in a red envelope to bring good fortune in the New Year. For many nations, blue is a symbol of protection and religious beliefs. Greek people often wear a blue necklace hoping to protect themselves against evils( 灾祸 ).
People's choice of colors is also influenced by their bodies' reactions toward them. Green is said to be the most restful color. It has the ability to reduce pain and relax people both mentally and physically. People who work in green environments have been found to have fewer stomach aches.
Red can cause a person's blood pressure to rise and increase people's appetites(食欲). Many decorators will include different shades of red in the restaurant. Similarly, many commercial websites will have a red "Buy Now" button because red is a color that easily catches（吸引） a person's eye.
Blue is another calming color. Unlike red, blue can cause people to lose appetite. So if you want to eat less, some suggest that eating from blue plates can help.
The next time you are deciding on what to wear or what color to decorate your room, think about the color carefully.
20. Muslims consider green as a symbol of heaven mainly because of their .
A. cultural values B. commercial purposes
C. personal experiences D. physical reactions to the color
21. Why will many commercial websites have a red “buy now” button?
A. To relax people physically.
B. To increase people's appetites.
C. To encourage people to make a purchase（购买）.
D. To cause a person's blood pressure to rise.
22. What color might help lose weight according to the text?
A. Red, B. Green. C. Blue. D. Purple.
23. Which of the following would be the most proper title for the text?
A. Colors and Human Beings B. The Cultural Meaning of Color
C. Colors and Personal Experiences D. The Meaning and Function of Color