【毎日一問】2.8 満たし問題:同じベンゼン製造プラントの原料の出所
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穴埋め問題:トルエン製造装置の原料は、蒸留装置の()および()留分に由来する。答え:減二線、減三線
正解+2 詳細討論+5 @関工玉
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