题目内容
Formation flight is more comfortable because passengers can not see the other planes.
查看答案
搜索结果不匹配？点我反馈
更多问题
The role that weather plays in formation flight has not yet been clearly defined.
It has been documented that during World War II, America's armed forces once tried formation flight to save fuel.
The upwash experience may save propelling energy as well as reducing resistance.
Which of the following does NOT belong to products that help create people's habits？
微信支付 
支付宝支付