在一个雷雨交加的夜晚，小爽正在家里窗台下做作业，但他打开窗户向外望去…请你设想一下

（1）他可能会看到什么？听到什么？还有一个什么疑问？（提出一个与物理有关问题不用回答）

（2）小爽记得光在真空中的速度是C=3.0×10⁸m/s，声音在空气中的传播速度是V=340m/s，于是，他想探测打雷处距离他有多远？他动了动脑筋，用自己的电子手表测出了看到闪电后经过t=2s钟便听到雷声的时间，而后算了算，结果就出来了．请你粗略地将他的计算过程及结果写出来．

    Betty is an English girl. She studies in a middle school. On weekdays(非休息日) she gets up at 6:30. She has breakfast at seven. Then she goes to school on her bike(自行车). The school is near her home. She gets to school at around seven-thirty.

    Classes start at eight o'clock. She has four classes in the morning and two in the afternoon. Her favorite subject is history. She has lunch at 12:00 at school. Classes end(结束) at three-thirty. After school she usually goes to the history club and then goes home. She gets home at 5:00.

为了从甲乙两人中选一人参加数学竞赛，老师将两人最近的6次数学测试的分数进行统计，甲乙两人的得分情况如茎叶图所示，若甲乙两人的平均成绩分别是，，则下列说法正确的是(    )