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高达两万米，看起来却是平的！带你认识太阳系最高峰：奥林匹斯山
太阳系中最大的火山是火星上的奥林匹斯山，高度达22000米，直径约1100公里，面积相当于整个意大利。它相对平坦，坡度只有五度。
探索宇宙奥秘，发现更多不可思议152/197
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