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单选题
Explain how to maintain this record when changes to the weight or moments of the airplane are made so that accurate starting data is available to calculate the weight and C.G. during normal operation of the airplane.
A
说明如何保持此记录，以便更改飞机的重量或力矩时，或在飞机正常运行时可以使用准确的起始数据来计算重量和重心。
B
说明在更改飞机的重量或力矩时如何保持此记录，以便在飞机正常运行期间可以使用重量和平衡来准确计算起始数据。
C
说明当飞机重量或力矩发生改变时如何进行记录，以便在飞机正常运行期间能够为计算重量和平衡提供准确的起始数据。
答案解析
正确答案：B
相关知识点：
飞机重量力矩记录要求
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