气象目标对雷达电磁波的()是雷达探测的基础。
参考答案:散射
圆心为(1,2)且与直线5x﹣12y﹣7=0相切的圆的方程为( ).
I have classes today . class is P.E.
A.eight , English
B.eight , The eighth
C.eighth , The eighth
D.eighth , English