题目内容
(请给出正确答案)
[主观题]
One disadvantage of alliances foreseen by the critics is that air travel may be moreexpens
ive as a result of
A.less convenience.
B.higher operation costs.
C.less competition.
D.more joint marketing.
如搜索结果不匹配,请 联系老师 获取答案