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My Answered Questions
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what causes echo?
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is hair living or non living cell?
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are there any specific sources of information which scientists use in there daily activties?
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what challenges do scientist face?
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before a scientist is said to have invented something,what are the stages must he/she follow?
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what causes common cold?
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WHAT IS THE WORK OF A SCIENTIST
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WHICH SUBJECT S DO I NEED TO PASS TO BE A SCIENTIST
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