下列函数中,既是奇函数又是增函数的为( )
A:y=cosx-1
B:y=-x3
C:y=x|x|
D:y=1x
_____LiJun is only 10, _____ she has taken care of her sick father for three years.
I was told ________ twenty years ago, but it has changed a lot so far.