• 2022-05-27
    ‎ 弗克扩散定律的公式,哪个是准确的表述:‎‎‎
    A: [img=78x42]18034d21d789f02.png[/img]
    B: [img=68x42]18034d21e302519.png[/img]
    C: [img=75x44]18034d21ee11d15.png[/img]
    D: [img=68x42]18034d21f8280db.png[/img]