Analysis of test questions: This question examines the relevant contents of the Olympic Games in ancient Greece. According to the knowledge learned, in the 6th century BC, the Persian Empire was formed in ancient Iran with Persians as the center. In the early 5th century BC, the Persian Empire turned its finger at Europe and sent troops to Greece for three times, known as the Greek-Persian War. In 490 BC, the Athenian army defeated the Polish army in the marathon plain, and the soldier Feridipitz returned to Athens to report that he was exhausted from completing the task, which led to today's marathon.