发布时间:2025-01-31 23:39:56
(1)气管;支气管;肺泡;胸廓;膈肌 (2)膈肌 (3)变大;吸气;肺内气压小于大气压;变小;呼气;肺内气压大于大气压 |
灭火器、消防栓、火警警铃、消防喷淋、消防应急灯,这些的作用都是什么
2025-01-31 23:39:56 2025-01-31 23:39:56 2025-01-31 23:39:56 2025-01-31 23:39:56 2025-01-31 23:39:56 2025-01-31 23:39:56 2025-01-31 23:39:56