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毎日1問、正解者には6つの財富が報酬として与えられ、参加者には2つの財富が与えられます;12月14日

2016-12-14View Original

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単一選択問題:気体が異なる管径の配管内を安定して流動するとき、その( )は変わらない。 A. 流量 B.質量流量 C.体積流量 D.質量流量と体積流量の両方 答え:B.質量流量

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