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學習 英文
課程
US Airport Screeners Look for Behaviors
US Airport Screeners Look for Behaviors
US Airport Screeners Look for Behaviors
Five years after the attacks of September 11th, 2001, U.S. transportation officials are rolling out a new type of screening program at airports across the country.
1 Lesson
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課程
US Airport Screeners Look for Behaviors
US Airport Screeners Look for Behaviors
