单项选择题
Which of the following must be eliminated to prevent accidents?（）
A.Unsafe actions B.Orderliness C.Frequent inspections D.Good work habit
单项选择题 Which of the following is not a recommended safe practice?（）
单项选择题 When required to work where there may be explosive gases, you should use tools which are （）
单项选择题 Prior to entering a cargo pump room, you should ensure that （）.
