阅读理解。
The continent of Africa has a long history and a rich culture,and this is shown in traditional dress. You
often find three colours-red, gold and green-in the clothing．The first colour stands for (象征) the blood
of millions of people who suffered as slaves (奴隶); the second is for the rich resources (资源) of the
African earth; and the third represents the grasslands of home．
Because clothing has a strong social meaning, people are very careful in choosing what to wear. It
would be a serious mistake to wear the wrong clothing, or to wear clothes in the wrong way. For
example, in Ghana, a woman should wear her waistband (腰带) differently according to the importance
of the social event.
Traditional dress also tells us about everyday life. African designs are famous for loose (宽松的)
clothing. Tile climate, with the hot sun and wide temperature ranges (变化), requires that the clothes are
comfortable for daily life.
Although many people wear Western clothes,particularly in the big cities in Africa,traditional African
dress is very highly valued. This is because it has deep cultural meanings.
1. The passage is mainly about _____.
A. the history of clothes in Africa
B. modern fashion styles in Africa
C. the meanings of traditional dress in Africa
D. the materials used in traditional dress in Africa
2. According to the passage,red _____.
A. represents the setting sun
B. stands for the African earth
C. is chosen because it is a bright colour
D. is a reminder of the sad history in Africa
3. Traditional dress should also be practical because _____.
A. it needs to keep people dry in the rainy season
B. it needs to protect people from the climate
C. people wear it in the big cities
D. it has deep cultural meanings
应的C语言表达式是