下列动物中,属于恒温动物的是( )
A:海葵
B:鲤鱼
C:蜗牛
D:企鹅
My father came back while I was having dinner.
Cindy's brother likes ping-pang, but he a ping-pong bat.
若二次函数y=x2+bx的图象的对称轴是经过点(2,0)且平行于y轴的直线,则关于x的方程x2+bx=5的解为( )