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प्रश्न
The mountaineers carry oxygen with them because ______.
विकल्प
At an altitude of more than 5 km, there is no air.
The amount of air available to a person is less than that available on the ground.
The temperature of air is higher than that on the ground.
The pressure of air is higher than that on the ground.
उत्तर
The mountaineers carry oxygen with them because the amount of air available to a person is less than that available on the ground.
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संबंधित प्रश्न
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