单选题The center of gravity of a freely swinging load suspended from a pedestal crane acts as if it were located at the（）.AcounterweightBpedestalClongitudinal centerlineDpoint of suspension
单选题
The center of gravity of a freely swinging load suspended from a pedestal crane acts as if it were located at the（）.
A
counterweight
B
pedestal
C
longitudinal centerline
D
point of suspension
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