回答下列问题:(6分) (1)数轴上表示2和5的两点之间的距离是_____, 数轴上表示-2和-5的两点之间的距离是_____, 数轴上表示1和-3的两点之间的距离是_____; (2)数轴上表示 x 和-1的两点 A 和 B 之间的距离 是_____,如果| AB |=2,那么 x =_____________; (3)当代数式| x +1|+| x -2|取最小值时,相应 x 的取值范围是_________________.
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