如图所示电路，电源电压不变，滑动变阻器上标有“2A 20Ω”字样．以下四个图象中，能正确表示当开关S闭合后，通过小灯泡L的电流I与滑动变阻器连入电路的电阻R的关系的是（　　）

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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！