题目内容

If the flight has been delayed, the passengers should be informed.

A. 对
B. 错

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Passengers should tell check-in officer the weight of their luggage.

A. 对
B. 错

The check-in officer has to make sure the late passengers get to the flight

A. 对
B. 错

If the passenger complains, check-in officer could igore their complaints.

A. 对
B. 错

撒销固定循环指令除了G80外，( )也能起撒销作用，编程时要注意。

A. G73
B. G90
C. G40
D. G01