单项选择题
A. Car crash. B. Heavy snow and ice. C. Truck rollover on highway. D. Train derailment.
A. achieve cleaner, more energy-efficient modes of transportation. B. reduce the energy intensity of economic activities. C. reach the goal of reducing transportation cost. D. promote the use of fossil fuels.
A. Food and our health. B. Food and additives. C. Food and cancer. D. Food and culture.