Doctors generally agree that such factors as cigarette smoking, eating rich foods high in fats, and alcohol consumption not only do damage by themselves but also aggravate genetic predispositions toward certain diseases.
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Anot only do damage by themselves but also aggravate
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Bdo damage by themselves but also are aggravating to
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Care damaging by themselves but also are aggravating
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Dnot only do damage by themselves, they are also aggravating to
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Eare doing damage by themselves, and they are also aggravating
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正确答案: A