Would you mind ____ (close) the window, please? It's so cold.
There are no ____ (bridge) over the river.
小明在家中打开冰箱看到一些现象下列说法错误的是( )
已知圆C:x-a2+y-b2=r2的圆心为抛物线x2=-4y的焦点,直线x-y=2与圆C相切,则该圆的方程为( )