为了避免推土机作业过程中发生碰撞伤人事故,应对作业人员有何要求?
参考答案:设立警示牌机身周围5米范围内禁止站人,对无关人员要先疏导远离后方可施工。
— Would you mind me _____?
— _____. Do it as you like please. [ ]
A. to play the piano, Good idea
B. playing the piano, Of course not
C. playing the piano, Of course
D. play the piano, All right
以下选项不是碳的组成形态的是()
A、石墨
B、金刚石
C、碳80
D、石墨烯