毎日1問、正解者には6つの富を、参加者には2つの富をプレゼント；第471題
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複数選択問題：塩化ビニルモノマーが燃えた場合、消火に使用すべきものは（ ）1211および乾式消火器 A砂土 B窒素 C蒸気 D二酸化炭素 答え：ABCD
A 沙土 B、窒素 C、蒸気 D、二酸化炭素
塩化ビニルモノマーが燃えた場合、消火には（A B C D）1211および乾式粉体消火器を使用する。A 砂土 B 窒素 C 水蒸気 D 二酸化炭素
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