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What are the effect of first-hand and second-hand tobacco smoke on the human respiratory system? what are the effects of second-hand smoking on children and the unborn?
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Witch type of microscope is used to view very small cell components like proteins and dna?
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What the theory that the sun goes around earth was replaced with the theory that earth goes around the sun this was an exaple of a
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How can active reading strategies you? o a. they can you get into better physical shape. o b. they can you read fewer science articles. o c. they can you understand what you read. o d. they can you avoid reading altogether.
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What are the effect of first-hand and second-hand tobacco smoke on the human respiratory system? wh...
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