“标记及号码”一栏应填写实际货物运输包装上的标记，如果无标记，应填写N/M。 ( )
参考答案：对
Look at the timetable. Hurry up! Flight 4026 _____ off at 18:20. [ ]
A. takes
B. took
C. will be taken
D. has taken
多台塔机操作时，塔机间的水平、垂直安全距离不小于（ ）米。
