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環境保護 デイリーステッカー4.02 参加報酬5 正解すればさらに5

2016-04-02View Original

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単一選択問題:水体の汚染度は、溶存酸素(DO)、生化学的酸素要求量(BOD)、( )(COD)、総酸素要求量(TOD)、総有機炭素(TOC)といった複数の指標によって総合的に表される。A濁度 B硬度 CpH値 D化学的酸素要求量 D
Reply #22016-04-02
水体の汚染度は、溶存酸素(DO)、生化学的酸素要求量(BOD)、(D)(COD)、総酸素要求量(TOD)、総有機炭素(TOC)といった複数の指標によって総合的に表される。A濁度 B硬度 CpH値 D化学的酸素要求量

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