题目

Jean Driscoll can go faster in her wheelchair than the world’s best marathoners(马拉松运动员) can run!     In April, Jean finished the Boston Marathon in 1 hour 34 minutes 22 seconds. That’s about 33 minutes faster than the winning male runner! She competed on the track, too. She was second in the 800 meter wheelchair race at the 1992 Olympics.     Jean doesn’t like to be told she’s brave. “I’m in sports because I’m a competitive person!” Jean was born with spina befida(脊柱裂), a birth illness that damages the spine（脊椎）. She began to use a wheel关于频率与概率有下列几种说法：①“明天下雨的概率是 90%”表示明天下雨的可能性很大；②“抛一枚硬币正面朝上的概率为”表示每抛两次就有一次正面朝上；③“某彩票中奖的概率是 1%”表示买 10 张该种彩票不可能中奖；④“抛一枚硬币正面朝上的概率为”表示随着抛掷次数的增加，“抛出正面朝上”这一事件发生的频率稳定在附近. 正确的说法是（ ）A. ①③ B. ①④ C. ②③ D. ②④