Sanya is ____ in winter. It's ____ than many other cities in China. (warm)
过点P(﹣2,0)的直线与抛物线C:y2=4x相交于A,B两点,且|PA|=12|AB|,则点A到抛物线C的焦点的距离为( )
下列有关工业的叙述,正确的是( )