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单选题
如果飞机尚未进行螺旋特性和改出方法的测试，（手册）应包含防止进入螺旋和可能的最佳改出技术的讨论，并附带说明飞机未进行任何相关测试、螺旋改出技术是基于制造商的最佳判断。
A
If the airplane has not been tested for twirl characteristics and recovery methods, a discussion shall be included on the limited conditions for preventing spins and the possible best recovery techniques, and it shall be stated that no testing has been conducted and that the recovery techniques are based on the manufacturer＇s best comment.
B
If the airplane has not been tested for spin characteristics and recovery methods, a discussion of prevention of spins and probable best recovery techniques will be included with a notation that no tests were made and the recovery techniques are based on the best judgment of the manufacturer.
C
If the aircraft has not been expanded for spin features and recovery ways, prevention of spin and possible best recovery techniques are discussed and it is determined that no exams have been performed and that recovery techniques are based on the manufacturer＇s best judgment.
答案解析
正确答案：B
相关知识点：
未测螺旋飞机防改要清楚
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