Đề thi HSG9 Môn Sinh Cấp huyện Tuy An 2010-2011

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Câu 1: (2 điểm)
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Câu 2: (3 điểm)
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Câu 3: (5 điểm)
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Câu 4: (5 điểm)
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Câu 5: (5 điểm)
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