甲，乙等5名志愿者全被随机分到A，B，C，D四个不同岗位服务，每个岗位至少有一名志愿者。若甲，乙两人不在同一岗位，则不同的分法有几种？

-- ------I toured zhangjiajie ,i was impressed with its beautiful scenery .A.For the first time B.At firstC.It was the first timeD.The first time

当m(9/4)^m的解集为? 还有m+2=(9/4)^m这个方程怎么解啊?????

6.When Mother entered the room,she found her baby_____.A.sleepB.sleptC.asleepD.to sleep7.He sailed for New York on Thursday,_____there on Sunday.A.arrivingB.and ...

1. 设函数F(X)=ax^2+(2a-1)x+1在「-3/2,2」上的最大值为3,求实数a:time:2.设不等式x^2-2ax+a+2≤0的解集为M,如果M包含于［1,4］,则实数a的范围为?:time: