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[单选题]
根据121部规定，合格证持有人的每架飞机在首次投入运行前应当通过局方的检查，符合本规则的要求并获得（)签署或其他方式的签署后才能投入运行。
A.国籍登记证
B.飞行员执照
C.维修许可证
D.适航证
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题目内容
（请给出正确答案）
如果结果不匹配，请 联系老师 获取答案
题目内容
（请给出正确答案）
A.国籍登记证
B.飞行员执照
C.维修许可证
D.适航证
如果结果不匹配，请 联系老师 获取答案
更多“根据121部规定，合格证持有人的每架飞机在首次投入运行前应当…”相关的问题
The aircraft industry in Europe receives aid from several governments，according to some estimates，equal to 20 percent of the purchase price of each aircraft．For example，an airplane that sells for ＄50 million may have cost ＄60 million to produce，with the difference made up by European governments．At the same time．approximately half the purchase price of a“European”aircraft represents the cost of components purchased from other countries(including the United States)．If these estimates are correct，what is the effective rate of protection received by European aircraft producers？
架短程客机，每架远程客机维修量相当于架短程客机．为获取最大利润，该公司应购买各类客机各多少架？
