日日人人_亚洲美女在线视频_av手机在线播放_国产大片aaa_欧美中文日韩_午夜理伦三级

若直線l將圓x²+y²－2x－4y=0平分，且不通過(guò)第四象限，那么直線l的斜率的取值范圍是

A.［0，2］                                                    B.［0，1］

C.［0，］                                                  D.［0，)

(文)如果直線l將圓x²＋y²－2x－4y＝0平分，且不通過(guò)第四象限，則直線l的斜率的取值范圍是                                                                                             (　　)

A．[0,1]                     B.           C.                       D．[0,2]

 (理)若曲線x²＋y²＋2x－6y＋1＝0上相異兩點(diǎn)P、Q關(guān)于直線kx＋2y－4＝0對(duì)稱，則k的值為                                                                                             

A．1                   B．－1                C.               D．2

(文)如果直線l將圓x²＋y²－2x－4y＝0平分，且不通過(guò)第四象限，則直線l的斜率的取值范圍是                                                                                             (　　)

A．[0,1]                     B.           C.                       D．[0,2]

 (理)若曲線x²＋y²＋2x－6y＋1＝0上相異兩點(diǎn)P、Q關(guān)于直線kx＋2y－4＝0對(duì)稱，則k的值為                                                                                             

A．1                   B．－1                C.               D．2