121 If various goods are loaded onto a vehicle, the heavier goods are required to be placed:
(A) in the rear area of vehicle
(B) in the front of the vehicle
(C) distributed evenly on the vehicle.
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統計: A(1), B(0), C(2), D(0), E(0) #2214582
統計: A(1), B(0), C(2), D(0), E(0) #2214582