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My Answered Questions
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why is it dangerous to run a car engine in aclosed garage?
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why is it dangeous to have high level of cholestrol
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why do workers such as miners who have worked in a dusty envionment for many years breath more rapidly than people who
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why do athletes often eat glucose, sweets just before a race
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why does a our breathing rate increase when we do energetic exercise ?
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do insects have heart?
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Does globle warming increase the level of sea water ?
My Comments