浄化毎日の質問 0420
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反映する**石油化学工業の発展規模とレベルに応じた物質は、( ) A 石油 B エチレン C スチレン D ブタジエン
反映する**石油化学産業の発展の規模とレベルを持つ物質は (B) A 石油 B エチレン C スチレン D ブタジエン
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