一汽车在路面情况相同的公路上直线行驶,下面关于车速、惯性、质量和滑行路程的讨论正确的是( )
A:车速越大,它的惯性越大
B:质量越大,它的惯性不一定越大
C:车速越大,刹车后滑行的路程越长
D:车速越大,刹车后滑行的路程越长,所以惯性越大
食物在口腔中充分咀嚼的重要意义是( )
找出错误的地方并改正。
The old man as well as his children were excited .
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