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環境保護 デイリーステッカー 9.14 参加報酬 3問正解でさらに5

2016-09-14View Original

Thread Content

複数選択問題;水銀、カドミウム、ヒ素、( )などを含む溶解性の強い有毒廃棄物を、水域に排出したり、投棄したり、直接地中に埋めたりすることは禁止されている。A. クロム B. 鉛 C. ニトリド D. 黄リン . abcd
Reply #22016-09-14
ABCD~~~~~~~~
Reply #32016-09-14
A. クロム B. 鉛 C. 緒化物 D. 黄リン .
Reply #42016-09-14
A. クロム B. 鉛 C. 緒化物

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