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… changed. Decreased oxygen in the blood (hypoxia) from high altitude. Exposure to toxins (poisons), such as carbon … changed. Decreased oxygen in the blood (hypoxia) from high altitude. Exposure to toxins (poisons), such as carbon …
Health topics
… Toddler’s Vision  English  |  Chinese  |  French Preventing Sickness  English  |  Chinese  |  French When Your Toddler …