Resistance: refers to the ability of a substance to hinder the flow of current. Its size is related to the nature of the material. By this definition, which of the following is wrong with the following statement? ['The superconductivity of some materials at low temperatures means that at extremely low temperatures, the ability of the material to prevent current flow becomes smaller, or even zero.', 'Low power loss during high-voltage transmission. It means that the resistance of the conductor is small during high-voltage transmission, and the resistance of the conductor is large during low-voltage transmission.', 'Copper wire has less resistance than iron wire, which does not mean that current flows in copper wire faster than iron wire.', 'Replace the filament (tungsten wire) of the incandescent lamp with a copper wire with low resistance, the luminous ability of the bulb is greatly reduced, but the life span is greatly improved.']