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Participation reward: 2 Wealth. Reward for correct answer: 9 wealth. “One communication and three defenses” refers to ( ). A. Ventilation, gas prevention, comprehensive dust control, water control B. Ventilation, gas prevention, comprehensive dust control, fire prevention C. Ventilation, gas prevention, fire prevention, water control D. Ventilation, gas prevention, roof collapse prevention, water control
B. Ventilation, gas prevention, comprehensive dust control, fire and explosion prevention
B. Ventilation, gas prevention, comprehensive dust control, fire and explosion prevention
B. Ventilation, gas prevention, comprehensive dust control, fire and explosion prevention
B. Ventilation, gas prevention, comprehensive dust control, fire and explosion prevention
“\"One pass, three defenses\" refers to (B). A. Ventilation, gas prevention, comprehensive dust control, water control B. Ventilation, gas prevention, comprehensive dust control, fire prevention C. Ventilation, gas prevention, fire prevention, water control D. Ventilation, gas prevention, roof collapse prevention, water control
“\"One pass, three defenses\" refers to (B). A. Ventilation, gas prevention, comprehensive dust control, water control B. Ventilation, gas prevention, comprehensive dust control, fire prevention C. Ventilation, gas prevention, fire prevention, water control D. Ventilation, gas prevention, roof collapse prevention, water control
“\"One defense against three hazards\" refers to (B). A. Ventilation, gas prevention, comprehensive dust control, water control B. Ventilation, gas prevention, comprehensive dust control, fire prevention C. Ventilation, gas prevention, fire prevention, water control D. Ventilation, gas prevention, roof collapse prevention, water control