【单选题】听力原文: The flag, the most common symbol of a nation in the modem world, is also one of the most ancient. With a clear symbolic meaning, the flag in the traditional form. is still used today to mark bui...
【单选题】听力原文: The flag, the most common symbol of a nation in the modern world, is also one of the most ancient. With a clear symbolic meaning, the flag in the traditional form. is still used today to mark bu...