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What's the highest mountain in the world？Qomolangma.
How high is Qomolangma?It's 8,844.43meters high.It's higher than any other mountain.Which is the deepest salt lake in the world?The Caspian sea is the deepest of all the salt lakes.Did you know that China is one of the oldest countries in the world?Yes，I did. It's much older than the US.
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