Science 10 April 17 in-class Practice (id: 52b67fec5)

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本题目来源于试卷: Science 10 April 17 in-class Practice，类别为 unclassified

[问答题]
Can the velocity of an object be negative when its acceymd r 8 h6yqrp4v *k/g4j)kbn9l- eration isvc,g/ie+w g )h positive? What about vice versa? If yes, give examplgeg+h icw /v),es in each case.

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