Which of the following is not an advantage of central parallel ventilation?( )
A: The ventilation system is basically independent and safe
B: Centralized layout of industrial sites
C: Convenient management
D: Less coal-pillar loss
A: The ventilation system is basically independent and safe
B: Centralized layout of industrial sites
C: Convenient management
D: Less coal-pillar loss
举一反三
- Smoke Exhaust and Ventilation System
- Which of the following is primary function of mechanical ventilation? A: Maintain alveolar ventilation and correct hypoxemia B: Increase carbon dioxide C: Increase blood volume D: Maintain pulmonary blood flow
- Which of the following factors affect the evenness of the flock ( ) A: Feeding density B: Temperature C: Lighting D: Ventilation
- Which of the following about ventilation/perfusion ratio is wrong? A: normal value in quiet state is 0.84 B: decreasing of ventilation/perfusion ratio means that the alveolar ineffective cavity increases C: ratio in pulmonary bottom is the smallest D: in pulmonary embolism, the ratio increases
- What is the difference between nature ventilation and mechanical ventilation?