641.A large vehicle loaded with sand and gravel is traveling in the slow lane of a road with a lane dividing line,and passes through an unsignalized intersection on a rough road surface. Which of the following bestcomplies with regulations? (A) Cargo must be properly covered and secured, and the driver must followthe slow lane speed limit, reduce speed, and be ready to stop at any time. (B) As long as the speed limitis not exceeded, cargo shifting is normal and requires no action. (C) Only the slow lane speed limit of 40km/h needs to be met; there is no special requirement to cover the cargo.

642.When a vehicle breaks down and cannot be driven, it should be moved to a location that does notobstruct traffic. Regarding the handling of breakdown warning signs before or after the vehicle is moved,which of the following is incorrect? (A) On roads with a speed limit of 40 km/h or below, the sign shouldbe placed on the road surface 100 meters behind the vehicle; placement at an appropriate position infront of the vehicle may be set as needed. (B) On roads with a speed limit exceeding 40 km/h, the signshould be placed on the road surface between 30 and 100 meters behind the vehicle; placement at anappropriate position in front of the vehicle may be set as needed. (C) On congested road sections, thesign should be hung on the rear of the vehicle; placement at an appropriate position in front of the vehiclemay be set as needed.

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