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Manypeoplehavewonderedwhatmakestheoceansriseandfallonth...
問題詳情:Manypeoplehavewonderedwhatmakestheoceansriseandfallontheword’sbeachestwiceaday.ThosetidesarecausedbytheforceoftheMoon’sgravityandtherotation(自轉)oftheEarth.Gravityactsonthecenterofanysolido...
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