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討論內容： good material thanks do my paper me Doctors treating survivors of last weekend’s plane crash in San Francisco, in which two people died and 181 were hurt, have urged manufacturers to consider introducing three-point seatbelts after a number of passengers suffered spinal injuries. Other commentators have suggested that aircraft designers consider installing rear-facing seats, as they provide better support for the back, neck and head in the event of sudden deceleration.

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