[单选] 爱迪生在发明电灯之前做了两千多实验，有个年轻的记者曾经问他为什么遭遇这么多次失败。爱迪生回答：“我一次都没有失败。我发明了电灯。这只是一段经历了两千步的历程。”爱迪生之所以说“我一次都没有失

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