It is true. It was designed in 1913-14 by Baron de Coubertin, but it has been used since the VII Olympiad In Antwerp, Belgium in 1920.
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Ex2(p108) give the description A. The Olympic motto
is Citius,Altius,Fortius. B. The Olympic Anthem C. The Olympic Creed D. The Olympic Flame E. The Olympic Flag F. The Olympic Opening Ceremony G The Olympic Mascot