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Original usage refers to rivers that ______ . [br] Algae under normal conditions
Original usage refers to rivers that ______ . [br] Algae under normal conditions
游客
2024-06-14
30
管理
问题
Original usage refers to rivers that ______ . [br] Algae under normal conditions in rivers ______ .
选项
A、consume the available nutrients
B、make the oxygen balance
C、force other organisms out of rivers
D、overgrow and die
答案
B
解析
该句提到的Under normal conditions, algae contribute to the oxygen balance in rivers...明确指出海藻在河里的作用是使氧气平衡,故[B]为答案。[A]、[C]和[D]是针对此句后半句设的干扰项,是海藻数量过多时的情况,故不选。
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