【空調版】毎日一問20171126
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水ポンプの正常な連続試運転時間は、（）時間以上でなければならない。 A、2 B、3 C、4 D、5
水ポンプの正常な連続試運転時間は？（A）時間未満であってはならない。 A、2 B、3 C、4 D、5
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