NO.PZ2020021002000043
问题如下：
Airlines are heavily exposed to volatile jet fuel prices, with as much as 45-60% of airline operating costs burnt in the air.
选项：
A.
True
B.
False
解释：
False, because only 15-20% of airline operating costs are burnt in the air.
中文解析：
本题选B。航空公司只有15%-20%的运营成本是在燃油上的。
好像在教材上没看到过嘛
