A、They may find it difficult to inflate their balloons. B、Their balloons are potentially explosive and dangerous. C、Their flight

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问题  

选项 A、They may find it difficult to inflate their balloons.
B、Their balloons are potentially explosive and dangerous.
C、Their flight patterns could be uncertain due to the wind.
D、They’ll suffer financial loss if some balloons can’t take off.

答案C

解析
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