用函数关系式表示:“y比x的2倍多3”可表示为y=______.
由题意得:y-2x=3,
则:y=2x+3,
故答案为:2x+3.
两条互相平行的直线分别过点A(6,2)和B(-3,-1),并且各自绕着A,B旋转,如果两条平行直线间的距离为d.
求:
(1)d的变化范围;
(2)当d取最大值时两条直线的方程.
Some disputes among these countries are ______ by history. A. left over B. turned over C. handed over D. taken over