单项选择题
A．products should be made with less cost but higher efficiency B．products should be sold at low prices in large quantity C．products should be sold at high prices in large quantity D．standards must be established in his plants
A．Henry Ford changed American society with his invention of cars. B．Henry Ford had a personality different from ordinary people. C．Henry Ford was one of the greatest American industrialists. D．Henry Ford built the first assembly line in the worl
A．the brain system. B．functions of kidneys C．other human organs related to the kidneys D．reactions of the body to stress and danger