• 2022-06-30
    对数螺线[img=47x23]18038df8f075cd1.png[/img]上相应于[img=76x22]18038df8f8b94e6.png[/img]的一段弧长为( )
    A: [img=87x29]18038df9016157c.png[/img]
    B: [img=87x29]18038df909ed19d.png[/img]
    C: [img=71x25]18038df91273f9c.png[/img]
    D: [img=71x25]18038df91b0f274.png[/img]