Mostofyouknowthismathematicalgame,ofcourse.Youandyourfr...
问题详情：Mostofyouknowthismathematicalgame,ofcourse.Youandyourfrienddrawcrossesandcirclesonasheetofpaper.Youdoitoneafteranother.Thefirstpupilwhogetsthreemarksinarowwins.Butdoyouknowthatyoucanplaythisga...