(文)如果直线l将圆x2＋y2－2x－4y＝0平分，且不通过第四象限，则直线l的斜率的取值范围是                                                                                             (　　)

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

 (理)若曲线x2＋y2＋2x－6y＋1＝0上相异两点P、Q关于直线kx＋2y－4＝0对称，则k的值为                                                                                             

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

D

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