英语翻译一 If a film takes 90 minutes to show,what fraction of th
英语翻译 一 If a film takes 90 minutes to show,what fraction of the film is completed 15 minutes after it begins? 二 On a square gameboard that is divided into N rows of N squares each,K of these squares lie along the boundary of the gameboard. On a square gameboard that is divided into N rows of N squares each,K of these squares lie along the boundary of the gameboard,which of the following is a possible value for K A.10 B.25 C.34 D.42 E.52