【简答题】A)It made a series of sharp turns in the sky. B) It took off and landed on a football field. C) It proved to be of high commercial vale D) It stayed in the air for about two hours. 6. A) Inadequate f...
【简答题】A) It stayed in the air for about two hours. B) It took off and landed on a football field. C) It proved to be of high commercial value. D) It made a series of sharp turns in the sky. 6. A) Engineerin...