第9题: [单项选择]The woman found out about the item________. A. because a salesman recommended it B. because she saw an advertisement C. because her friend has one D. because she bought one before 参考答案:C
第18题:[单选题]How should thrust reversers be applied to reduce landing distance for turbojet aircraft? A.Immediately after ground contact. B.Immediately prior to touchdown C.After applying maximum wheel braking 参考答案:A