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单选题
Differences in design and complexity of the various types and models of airplanes play a major role in deciding whether a specific malfunction is more appropriately listed under "emergency" or "abnormal" procedures.
A
不同的设计和复杂的型号使得飞机有一个重大的作用来决定特殊的失效是否更适合列举为“紧急”或“正常”程序。
B
飞机的不同型号和机型的设计差异和复杂性，在决定某一特定故障是否更适合列为“紧急”程序或“异常”程序上发挥了重要的作用。
C
各种型号的飞机的复杂设计差异很大程度能够决定特定失效是否能够更方便地列入“加急”或“反常”程序。
答案解析
正确答案：B
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