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【毎日一問】汚水知識-12.30(回答+2、正解+5)

2015-12-26View Original

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単一選択問題 汚水の消毒において、次のうちどれが最も効率が高いか( )。 A オゾン B 塩素 C 二酸化炭素 D 酸素
Reply #22015-12-26
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Reply #32015-12-26
水の消毒において、最も効果的なのはどれか(B 塩素)。
Reply #42015-12-26
汚水の消毒において、どれが最も効果的か(A)。 A オゾン B 塩素 C 二酸化炭素 D 酸素
Reply #52015-12-26
汚水の消毒において、どれが最も効率が高いか(B)。 A オゾン B 塩素 C 二酸化炭素 D 酸素

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