如图，△ABO与△A′B′O′是位似图形，且顶点都在格点上，则位似中心的坐标是 ____ ．

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                                                                                                  梦想的力量

                                                                                                  每人的内心深处，

                                                                                                  都蕴藏着神奇的火花。

                                                                                                  它会点燃梦想的火，

                                                                                                  那自信自强的力量。

                                                                                                  自从人类之初，

                                                                                                  就使不同种族的人们团结一心。

                                                                                                  你有高远的意志，

                                                                                                  你有执著的精神，

                                                                                                  命运，就握在你自己手中。

                                                                                                  所有的孩子们啊！

                                                                                                  当你们踏上这个星球，

                                                                                                  梦想就带给你们希望和激励。

                                                                                                  所有的日子，所有的生命，

                                                                                                  都有不平凡的魅力。

                                                                                                  所有的人们，

                                                                                                  都会有不平凡的壮举。

                                                                                                  看圣火生生不息，

                                                                                                  梦想的力量在会聚，

                                                                                                  我们应该焕发火一样的生机，

                                                                                                  世界将其最珍贵的无私赐予，

                                                                                                  使我们超然于芸芸万物，

                                                                                                  更有梦想的力量使我们会聚在这里。

                                                                                                  我们应该焕发火一样的生机，

                                                                                                  世界因希望与和平而和谐统一。

                                                                                                  我们祈祷它永远这样美丽，

                                                                                                  梦想的力量使我们在这里会聚。

                                                                                                  我们都拥有如此神奇的力量。

                                                                                                  所有的兄弟姐妹啊！

                                                                                                  或许我此刻才发现，

                                                                                                  那些可望不可限的梦如今就在手边。

                                                                                                  梦想的力量，

                                                                                                  无形无边信念，

                                                                                                  给你征服恐惧的勇气。

                                                                                                  不管你身在何方，

                                                                                                  去摘取属于自己的明星吧！

                                                                                                  因为你有梦想的力量！

现实世界空间是三维的，绘画作为平面艺术是二维的。画家在二维平面所画的，只能是三维现实空间中实际物体的一部分，而人脑则通过这个部分将其想象成完整情形。由此可见（    ）

①艺术创作活动具有主动创造性      ②艺术的内容根源于创作者的构思

③人脑为艺术创作奠定生理基础      ④意识与之反映的实物必然存在差异

“流水清澈、鱼儿畅游、绿岛如茵…”不久的将来，城市的内河就将向人们呈现出这样一幅美丽的画卷．近年来，我省各市对内河展开了生态修复（如图所示），请分析回答：