• 2022-06-07
    As shown in the figure, which of the following is true? [img=399x398]1803a03c60cf5d2.png[/img][img=365x385]1803a03c6c3b38b.png[/img]
    A: FRC = F’RC = 0
    B: FRC = 0, F’RC ≠ 0
    C: FRC ≠ 0, F’RC ≠ 0
    D: FRC ≠ 0, F’RC = 0