即将离开知乎
您即将离开知乎,请注意您的帐号和财产安全。
https://www.aopa.org/training-and-safety/active-pilots/safety-and-technique/currency-vs-proficiency
您即将离开知乎,请注意您的帐号和财产安全。
https://www.aopa.org/training-and-safety/active-pilots/safety-and-technique/currency-vs-proficiency