• 2022-07-23
    扩散速率三倍于水蒸气的气体是 ( )
    A: He
    B: [img=22x22]1802d4d42605246.png[/img]
    C: [img=33x22]1802d4d42fd9527.png[/img]
    D: [img=35x22]1802d4d4383b964.png[/img]