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{"ops":[{"insert":"Which of the following statements about dissolved oxygen in water is false?\u00a0\u00a0\u00a0(1) Thermal pollution reduces dissolved oxygen content.\u00a0(2) Eutrophication reduces dissolved oxygen content.\u00a0(3) Biochemical oxygen demand is a measure of how much oxygen is used by micro-organisms in breaking down organic matter.\u00a0(4) The lower the dissolved oxygen content of a river, the better for fish and aquatic plant life\n"}]}
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