第9题: [单项选择]卵黄蒂不闭锁形成的畸形是()。 A. 脐粪瘘 B. 脐尿瘘 C. 先天性脐疝 D. 腹壁裂 参考答案:A
第10题:[单选题]In the following four items, which one is the operational benefits of GBAS( ). A.A、more diversions B.B、reduced flight inspection C.C、need for “ critical areas” required for MLS beam protectio n D.D、need for “ critical areas” required for ILS beam protecti on 参考答案:B