A:twenty-three thousand, four hundred and fifty-six
B:twenty-three thousand and four hundred fifty-six
C:two three thousand and four five six
D:two three thousand, four and five six
(按从上到下的顺序填写)
在深井里的同一点以相同的初动能将两个质量不同的物体竖直向上抛向井口,选取地面为零势能面,不计空气阻力,在它们各自达到最大高度时,下列说法中正确的是( )