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[". 【일일 문제 泵设备】 선택 문제

2018-11-20View Original

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本帖最后由 3983596_FPPZ 于 2018-11-21 21:40 编辑 bg1.png唐诗人李白的 “望庐山瀑布” 中有一句 "飞流直下三千尺",表明了:(多选) A.庐山海拔很高,所以水的势能很大 B.庐山海拔很高,所以水的动能很大 C.水的动能转化为势能的过程 D.水的势能转化为动能的过程 答案:AD 庐山海拔高,所以水的能量都是势能,在下落过程中,水的总能量保持不变,只不过由势能转化为动能,能量表现形式变化了,因此答案为AD。
Reply #22018-11-20
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