1) transfer power from engine to the wheels a) Gears b) Wheels c) Valves d) Piston e) Engine 2) control de flow of gas a) Gears b) Wheels c) Valves d) Piston e) Engine 3) a car needs to move a) Gears b) Wheels c) Valves d) Piston e) Engine 4) The cars has four and the bike has two a) Gears b) Wheels c) Valves d) Piston e) Engine 5) Move up and down a) Gears b) Wheels c) Valves d) Piston e) Engine

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