— girl is your sister?
— The one a red skirt.
A:Who; dress
B:What; wear
C:Who's; with
D:Which; in
已知幂函数f(x)=x-k2+k+2(k∈Z)满足f(2)<f(3),若函数g(x)=1﹣q,f(x)+(2q﹣1)x在区间﹣1,2上是减函数,则非负实数q的取值范围是 ____
解方程:4x2﹣8x﹣3=0.
珠江三角洲地区经济最重要的特点是( )