【B1】 [br] 【B10】 [audioFiles]audio_eusm_j01_287(20099)[/audioFiles]Much later he

游客2024-06-12 22

问题【B1】 [br] 【B10】

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答案 Much later he discovered that steam could be used for power，steam runs machines，heats homes，and makes electricity

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【B1】[br]【B7】[audioFiles]audio_eusm_j01_287(20099)[/audioFiles]flame此处应该填入一个名词