A:奇函数,且在(0,1)上是增函数
B:奇函数,且在(0,1)上是减函数
C:偶函数,且在(0,1)上是增函数
D:偶函数,且在(0,1)上是减函数
—Where is Lucy? I can't find her now.
—She ___________ Shanghai on business. She ___________ back in three days.
解下列一元二次方程:(1)x2-4x-1=0(2)(x-5)2=5-x