What if the passenger feels heart uncomfortable?
A.No idea how to deal with it.B.Ask the passenger whether he or she brings any medicine.C.Give an announcement to see if there is a doctor on board.D.Confirm whether the passenger has ever felt heart uncomfortable before.正确答案：Ask the passenger whether he or she brings any medicine.；Give an announcement to see if there is a doctor on board.；Confirm whether the passenger has ever felt heart uncomfortable before.
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