毎日1問、正解者には6つの財富を報酬として、参加者には2つの財富を報酬として与えます;第248題
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穴埋め問題:雷雨の天気で屋外の高圧機器を点検する必要がある場合は、______を着用し、____や_____に近づいてはならない。答え:(絶縁ブーツ、避雷針、避雷器)
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