1. Competition scoring method: average.

In the U-pool competition, after a snowboarder glided, five judges gave scores of 8 1, 89, 83, 88 and 84 respectively, excluding the highest score and the lowest score in the calculation. What is the skier's final score?

2. National flags of different countries: shapes and proportions.

The national flags of all countries in the venue are basically rectangular and look similar, but the ratio of length to width is not exactly the same. For example, the ratio of the national flag of China is 2: 3, that of the American flag is 10: 19, and that of Sweden is 5: 8.

Olympic symbol

The Olympic five-ring symbol consists of five Olympic rings, with five colors: blue, black, red, yellow and green. The meaning of the five rings symbolizes the unity of the five continents and the gathering of athletes from all over the world in the Olympic Games with fair and frank competition and friendly spirit.

According to the Olympic Charter, the property rights of Olympic symbols, Olympic flag, Olympic motto and Olympic anthem belong to the exclusive rights of the International Olympic Committee.