環境保護 毎日1枚 10月14日参加特典 3問正解でさらに5
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単一選択問題；人類が比較的利用しやすい淡水資源は( ) A. 河川水、表層地下水、深層地下水 B. 河川水、氷河水、表層地下水 C. 河川水、表層地下水、淡水湖水 D. 氷河水、表層地下水、淡水湖水 c
川の水、表層地下水、淡水湖の水
川の水、表層地下水、淡水湖の水
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