12.在平面直角坐标系x′O′y′中,如果抛物线y′=2x′2不动,而把x轴、y轴分别向下、向左平移2个单位,则在新坐标系下抛物线的表达式为( )
0 294849 294857 294863 294867 294873 294875 294879 294885 294887 294893 294899 294903 294905 294909 294915 294917 294923 294927 294929 294933 294935 294939 294941 294943 294944 294945 294947 294948 294949 294951 294953 294957 294959 294963 294965 294969 294975 294977 294983 294987 294989 294993 294999 295005 295007 295013 295017 295019 295025 295029 295035 295043 366461
| A. | y=2(x+2)2-2 | B. | y=2(x+2)2+2 | C. | y=2(x-2)2-2 | D. | y=2(x-2)2+2 |