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单选题
描述飞机燃油系统时，应描述如何避免和发现燃油受污染的方法。
A
When describing the airplane＇s Fuel System, describe how to avoid and detect fuel residual.
B
In the description of the airplane＇s Fuel System, how to avoid and notice fuel contamination shall be explained.
C
When describing the airplane＇s Fuel System, methods shall be described to prevent and purify fuel contamination.
答案解析
正确答案：B
