This Winter Olympics is hosted by Beijing and hosted by Zhangjiakou. Why choose Zhangjiakou instead of the northeast where the temperature is lower? In addition to distance, it also has a lot to do with temperature.

Previous Winter Olympics are usually held in February, and the temperature-17℃~ 10℃ is the most ideal temperature.

2. Winter Olympics Competition Year: arithmetic progression

The Winter Olympics is held every four years. This year is the 24th Winter Olympics. 2 1 What year is the Winter Olympics? 3. Winter Olympics events: classification and combination

This year's Beijing Winter Olympics has seven major events, 15 minor events and 109 minor events.

4. National flags of different countries: shape and proportion

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.

Moreover, even if they are all national flags with vertical stripes, the proportion of different colors may be different. For example, the width ratio of the blue, white and red colors of the French flag is 30:33:37. And the 2000-meter, 3000-meter and 5000-meter relay races.

5. Gu Ailing won the championship: rotation angle

Gu Ailing staged a two-week 1620-degree off-axis rotation when she fell behind her opponent in the first two jumps. The number of turns directly reflects the difficulty of ski jumping, from 1080, 1440 degrees to 1620 degrees, the difficulty is super doubled, and it miraculously wins the championship.