簡介：本課程旨在幫助學生準備參加美國國家經濟挑戰賽，介紹比賽規則、題型和解題策略，並提供相關的練習和模擬測試。

Introduction: This course aims to help students prepare for the US National Economics Challenge by introducing competition rules, question types, and problem-solving strategies, as well as providing relevant practice and simulated tests.