评论一个人英语作文
评论一个人英语作文
meter per second, 2 seconds after the second 2 meters, and so on, and whether the ball has multiple. Of course, a sinker fall faster than a feather, that is because the air resistance of feather caused. If a person released two do not suffer from any air resistance of objects, such as two different plumb, they at the same rate decline.
Galileo's measurement
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