Youmayhavetraveledbyairplanebefore,butdoyouknowhowthe...
問題詳情: Youmayhavetraveledbyairplanebefore,butdoyouknowhowthesebig"birds"flyinthesky? Thismonth,agroupofUSmiddleschoolstudentsvisitedMitchellInternationalAirport.Theygotthechancetoseehowp...