从5名志愿者中选派4人在星期五、星期六、星期日参加公益活动,每人一天,要求星期五有一人参加,星期六有两人参加,星期日有一人参加,则不同的选派方法共有
A.120种B.96种C.60种D.48种
正确答案:C

上一篇 News came from the school office ________Wang Lin had been admitted to Beijing Universi
下一篇 If we ___ the other road ,we might have arrived here in time for the meeting. ( ) A.tak