2016-11-24 判定問題（参加賞3点、正解賞8点）
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1、運転機器の動く部品には、潤滑が必要であり、その目的は潤滑と冷却です； 2、密度は金属材料の機械的性質です。 1、正解 2、間違い
1、運転機器の動く部品には、潤滑が必要であり、その目的は潤滑と冷却です； そう、2、密度とは金属材料の機械的性質です。間違い
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