如果执行如图的程序框图，那么输出的S=（ ） A．22 B．46 C．94 D．190
已知圆C经过，两点，且在y轴上截得的线段长为，半径小于5。 （Ⅰ）求圆C的方程； （Ⅱ）若直线∥，且与圆C交于点，，求直线的方程。
He________his position as the manager of the department because he was offered a better job. A．regained B．repeated C．represented
Hardly________ ________ the train started. A. I had reached the station; than B. did I reach the station;before C. had I reached the station; when D. I reached th
— Did Alice enjoy the concert held in Grand Theater yesterday? — Yes, she did. She _____ such an excellent concert for a long time. A. didn’t take part in
如图，已知两条直线l1:x-3y+12=0,l2:3x+y-4=0，过定点P(-1，2)作一条直线l，分别与l1,l2交于M、N两点，若P点恰好是MN的中点，求直线l的方程.
