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14. 关于节流膨胀, 下列说法正确的是

A、节流膨胀是绝热可逆过程

B、节流膨胀中系统的内能变化

C、节流膨胀中系统的焓值改变

D、节流过程中多孔塞两边的压力不断变化

时间：2021-09-01 16:55 关键词：青书学堂平顶山学院医学检验技术物理化学

答案解析

B

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