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【单选题】
规定向右为正方向,物体受合力F=-8N,设物体的质量m=10kg,则其加速度
A.
a=0.8m/s平方,方向向右
B.
a=-0.8m/s平方,方向向右
C.
a=0.8m/s平方,方向向左
D.
a=-0.8m/s平方,方向向左
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