题目

 ---____________a year does your school have sports meetings? ---Twice a year. A. How often    B. How soon    C. How long    D. How many times 答案：D如图，⊙O与正六边形OABCDE的边OA、OE分别交于点F、G，则弧所对的圆周角∠FPG的大小为        度．