• 2022-07-28
    曲线y=lnx,y=lna,y=lnb,(0A: [img=71x43]1802dff87fb1519.gif[/img]
    B: [img=78x46]1802dff88807513.gif[/img]
    C: [img=66x46]1802dff8903361c.gif[/img]
    D: [img=83x43]1802dff8990e0c0.gif[/img]