(commerce)Private aircraft carry so few people that they are 5 t
2024-08-12英语阅读（一）(00595)
(commerce)
Private aircraft carry so few people that they are 5 to 14 times more polluting than ______ planes,per passenger.
【正确答案】：commercial
Private aircraft carry so few people that they are 5 to 14 times more polluting than ______ planes,per passenger.
【正确答案】：commercial
