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  3. [audioFiles]audio_eusm_0110(20106)[/audioFiles]A、They’re expensive.B、They’re m

[audioFiles]audio_eusm_0110(20106)[/audioFiles]A、They’re expensive.B、They’re m

游客2024-06-06  20
问题  
选项 A、They’re expensive.
B、They’re much faster than hydrogen balloons.
C、They are more frequently used in the United States.
D、They’re a lot safer than hot-air balloons.
答案 A
解析
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