由于站台弧度及安全门影响司机瞭望时,司机关门后要确认车门关好,站台门与车门空隙安全,并确认车站人员显示()手信号后方可动车。
参考答案:好了
. Maybe you didn’t think highly of _____product, but I still hope that you could send someone over to take ____second look
A, the; the B. a; the C. the; a D. a;a
机械天平(电光分析天平)若长时间不使用,则应定时通电预热,一般每周一次,预热(),以确保一起始终处于良好使用状态。
A、30min
B、1h
C、2h
D、3h