1, zebra crossing:
The zebra crossing is generally composed of many parallel white solid lines, which are very similar to the lines on the zebra crossing, so it is called "zebra crossing". The function of zebra crossing is to guide pedestrians to cross the road safely. Appeared in the early 1950s. On May 20 19, the 3D zebra crossing was unveiled in Zhengzhou, Henan.
2. Basketball center line:
The basketball court is 28m long and15m wide without obstacles. The basketball court has soil, cement, asphalt and wood. Nowadays, the plastic floor of the basketball competition venue is used more. Soil, cement and asphalt sites are relatively economical and widely used in universities and grass-roots units, but attention should be paid to leveling the ground to prevent injury accidents.
There is a line parallel to the end line at the midpoint of the sideline, which is called the midline; The center line shall extend 0.15m (15cm) to the outside of both side lines.
3. Rebound:
The backboard shall be firmly placed according to the following requirements:
Placed at both ends of the basketball court, perpendicular to the ground and parallel to the end line; Their center should fall vertically on the court. 1 20 meters from the midpoint of the terminal line; The backboard column is at least 2 meters away from the outer edge of the end line. In order to make the athletes see clearly, its color should be bright and obviously different from the background behind the end line.
4. Staff:
It is a common notation in the world at present. Music is recorded by marking notes and other marks with different durations on five parallel horizontal lines with equal distance, which is one of the most widely used music scores.
The earliest birthplace is Greece, and its history is much earlier than the simple notation in digital form. In ancient Greece, the main form of music was vocal music. In Roman times, another symbol was used to represent pitch. This symbol is called Newham symbol.
5. Vertical roller coaster:
The vertical roller coaster, with the highest drop of 80 meters, is equivalent to the drop of 26 floors. It is the vertical falling roller coaster with the highest vertical drop in Asia, with a total track length of 98 1 meter. It used to be the longest vertical roller coaster in the world, with a vertical dive and surfing experience of nearly 90 degrees, a top speed of 1 12km/h, and three carriages, which can be used every time.