送交者: 忻民 于 December 02, 2009 22:32:09:
回答: 拉某已引领N位兄弟受洗(其中一兄弟已经成为牧师), 两年前拉某的两研究生和他们的夫人受洗. 这次希望能引领新旧约都不读的受洗. ^_^ 由 lala 于 December 02, 2009 21:42:22:
你别捣乱了,看看这道题的答案是什么?
how many ways are there to put markers on a 8 x 8 checkerboard. with at most one marker per square,such that each of the 8 rows and each of the 8 columns contain an odd number of markers?