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单选题
说明当飞机的重量或力矩发生变化时，如何保持该记录，以便在飞机正常运行时能够获得准确的起动数据来计算重量和重心。
A
When the weight or torque of the aircraft change, illustrate how to keep this record in order to save the exact initial values to measure the weight and heavy center in normal flight.
B
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 center of gravity during normal operation of the airplane.
C
When the changes to the mass or momentum occur, show the way to hold this record to get the beginning information easily to compute the mass and gravity core.
答案解析
正确答案：B
相关知识点：
重量力矩记录及用途
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