关于x的一元二次方程x2-2x+k=0有两个不相等的实数根,则k的取值范围是( ).
“含毫势若斩蛟蛇,挫骨还同断犀象。兴来索笔纵横扫,满座词人皆道好。一点二笔巨石悬,长画万岁枯松倒。叫啖忙忙礼不拘,万字千行意转殊。”材料描述的书法形式与下列哪幅图的书法形式相同( )
—I think teenagers should be allowed to make their own decisions when they have problems at school.
—_______. They're not calm enough, after all.
奇函数f(x)在3,7上是增函数,在3,6上的最大值是8,最小值是﹣1,则2f(﹣6)+f(﹣3)等于____.