2. 外语
  3. A、To commemorate a historic flight, B、To try out eight new balloons. C、To recruit balloonists from all over the United States. D

A、To commemorate a historic flight, B、To try out eight new balloons. C、To recruit balloonists from all over the United States. D

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问题  
选项 A、To commemorate a historic flight,
B、To try out eight new balloons.
C、To recruit balloonists from all over the United States.
D、To test whether helium (氦气) balloons are better than hot-air balloons.
答案A
解析
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大学英语六级

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