yes. An even simpler test, rolling two soda cans, one is filled
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送交者: steven 于 2008-02-21, 13:56:26:
回答: 是有区别,但从10米的高度掉下来,肉眼能看清这个区别吗? 由 smileykingkong 于 2008-02-21, 13:50:56:
and the other is empty down a slope, or drop them. You will see the difference.
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