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单选题
解释当飞机的重量或力矩发生变化时，如何保持该记录，以便飞机在正常运行期间可以获得准确的起动数据来计算重量和重心。
A
A.Explain when there is any change to the weight or force distance of the airplane, how to keep this record so as to acquire right starting data by calculating the weight and c.g. during normal operation of the airplane.
B
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 c. g. during normal operation of the airplane.
C
C.In order to get correct starting data during abnormal operation of the airplane, the weight and c. g. should be calculated and explain how to keep this record when there are changes to the weight or moments of airplane.
答案解析
正确答案：B
相关知识点：
重量力矩变化记录考点
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