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s the highest mountain in the world? what39。s in the nature? ? mountains ? seas ? rivers ? deserts ? lakes Nature high? long? deep? size? Which is the biggest number?Which is the smallest one? 1a A. 9,600,000 B. 1,025 C. 6,671 D Qomolangma The Sahara The Caspian Sea the Nile The Nile is ___________ ____________ long. ... ...