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29 In some airports, there is the final call announcement, but in others, they only have ____ signals on the sign board. Passengers are responsible for their own arriving at the boarding gate in time.
(A) image
(B) blinking
(C) faulty
(D) traffic

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難度： 簡單
最佳解!
Jin Shao 小六上 (2017/08/01)
blinking singal .....★★★★★★，...


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2F
Betty Mis 高一下 (2018/03/08)




29 In some airports, there is the final ..-阿摩線上測驗