Field events refer to jumping and throwing events, such as high jump, long jump, pole vault, triple jump, shot put, discus, javelin and hammer throw.
Track events refer to running. Such as 100 m, 1500 m, 1 100 m hurdles, 1000 m, etc.
Round robin system means that there are n teams, every two teams have to compete once, and finally the ranking of the competition is calculated according to the points.
Such as football league, basketball league and round robin. Single cycle and double cycle.
The elimination system is that there are n teams or people, draw lots to decide everyone's position, and then kill each other one by one. The winner enters the next round, and the loser is eliminated until the last winner becomes the champion.
For example, in the table tennis men's singles competition, first set 2 to the power of n, that is, 2 n, such as 16, 32, 64, 128, and then draw lots. If the number of people is not enough, the first round can be bye.
Sequential method refers to the competition method in which contestants show their achievements in a certain order. Generally, it is suitable for projects whose performance is determined by objective criteria such as time, distance, weight and number of rings. Divided into two forms: grouping and non-grouping.
The grouping order method is to divide the contestants into several groups and compete separately according to the grouping order. According to the number of teams, the ranking can be determined by the results of preliminaries, semi-finals and finals, or by a game (final). For example, sprint and middle-long distance running in track and field competitions.
For example, in the men's 100 meter race, there are 36 applicants, but there are only eight runways, so it is necessary to divide them into five groups with 7-8 people in each group, and each athlete in each group ranks according to the corresponding lane, so there is an order.
If more than two people (including two people) can't compete at the same time in the same competition time, the method of no grouping order shall be adopted. For example, the high jump and long jump in track and field competitions.
For example, in the high jump, * * * there are 20 participants, and the competition is not divided into groups. Only give each athlete an order to see who jumps first and who jumps later.
The sequential method can make the competition conditions of the contestants basically the same, with strong antagonism and fierce competition, which is conducive to creating good results. But it takes a lot of time, and it is difficult to evaluate all the rankings when there are many contestants. When using the sequential method, if there are too many participants, a qualifying match (passing match) can be held first, and those who pass can participate in the official competition.
So the correct answer to this question should be D.