短文理解 听力原文： Spot transaction means the actual and variable amount of the currency of one country which at any given time, can be bought for a fixed sum in the currency of another country. It is a term meaning that these transactions are settled on the second working day from the date of the deal. For example, you buy $ 5,000.00 US dollars on October 10th( say Wednesday) , the purchased US dollars will value on October 12th. 21. What does spot transaction mean? 22.When are the spot transaction settled? 23.What's the value date for purchase of $ 5,000.00 US dollars in the passage? (21)