靠蒸气的推力,上浮时将蒸气放大点,悬浮时将蒸气稳定,下沉时将蒸气放小点.
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热气球与飞艇是如何在空气中上浮、下沉和悬浮的?（关于物理的）
热气球与飞艇是如何在空气中上浮、下沉和悬浮的?（关于物理的）
最好用物理知识回答 、
最好用物理知识回答 、
物理人气：788 ℃时间：2019-10-23 09:46:09
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