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This post was last edited by kaminocmyhc on 2011-9-17 21:40. When current flows into the ground at a grounding point, it causes a voltage drop in the soil surrounding that grounding point. The voltage that appears between a person’s feet around the ground point is called ( ). A: Step voltage B: Step potential C: Critical voltage D: Fault voltage. **Safety indicators have been included in the 11th Five-Year Plan for National Economic and Social Development as mandatory targets for economic and social progress. Among the following indicators, which ones are included in this outline? ( ) A. Death rate per million kilometers of railway traffic, death rate per 100,000 people due to fires; B. Death rate per 10,000 vehicles in road traffic, death rate per million kilometers of railway traffic; C. Death rate per 100,000 people due to fires, death rate per million tons in coal mining; D. Death rate from production safety accidents per 100 million yuan of GDP, death rate from production safety accidents per 100,000 employees in industrial, mining, and commercial enterprises