【单选题】一 Will you please open the door for me? 一 . A . Yes , please B . My pleasure C . Not at all D . You ’ re welcome
【简答题】已知圆M与圆C:x 2 +y 2 -2x+4y+1=0同圆心,且与直线2x-y+1=0相切,则圆M的方程为 ______.
【单选题】对于垄断厂商来说
C.
提高价格未必会增加收益,降低价格未必会减少收益
【单选题】There's too much noise outside, I can hardly hear the announcer. Will you please the radio?
【简答题】Will you please kind enough ( ) obtain ( ) us all information possible respecting the standing of the company?
【简答题】已知圆 C 1 : x 2 + y 2 -2mx+4y+ m 2 -5=0 与圆 C 2 : x 2 + y 2 +2x-2my+ m 2 -3=0 ,若圆C 1 与圆C 2 相切,则实数m=______.
【单选题】試合に出られなかったのは、 実力 が足りなかったからだ。
【简答题】按要求改写句子。 1. Will you please sing a song for us?(改为祈使句) ___________ a song for us. 2. You should take some medicine if you have a cold. (对画线部分提问) ___________ I ___________ if I have a cold? 3. He is ri...
【单选题】对于垄断厂商来说
C.
提高价格未必会增加收益,降低价格未必会减少收益
【单选题】圆x 2 +y 2 +4x-4y-5=0与圆x 2 +y 2 -8x+4y+7=0 的公切线有 [ ]