在校级趣味运动会中,甲、乙两人轮流进行定点投篮比赛(每人各投一次为一轮),在相同条件下,每轮甲乙两人都在同一位置。设甲每次投球命中的概率为1/2,乙每次投球命中的概率为2/3,假设各次投球结果互不影响。5轮比赛中甲投中的次数服从
【单选题】Jane is in a hurry because the train to the airport leaves ___ half an hour.Jane is in a hurry because the train to the airport leaves ___ half an hour. A. by B. in C. for D. until 查看完整题目与答案 【单选题】Most graduates in big cities are suffering form...