若曲线y＝kx＋ln x在点(1，k)处的切线平行于x轴，则k＝________.
－1
∵y′＝k＋，∴y′|x＝1＝k＋1＝0，∴k＝－1.
肿疡基阍部周围之坚硬区，边缘清楚，称（）肿疡之基底根部称（）
A.肿疡
B.根盘
C.根脚
D.应指
E.护场
Nobody knows exactly how many years it will be ________ the Chinese football team enters the final
stage of the World Cup.[ ]
A. when
B. before
C. since
D. until
，∴y′|x＝1＝k＋1＝0，∴k＝－1.
，∴y′|x＝1＝k＋1＝0，∴k＝－1.