消防安全重点单位应当进行每周防火巡查,并确定巡查的人员、容、部位和频次()
硝基苯遇明火高热或与氧化剂接触,有引起燃烧爆炸的危险。与氨反应强烈()
Directions:This section is to test your ability to comprehend short passages. You will hear a recorded passage. After that you will hear five questions.Both the passage and the questions will be read