在100m跑的比赛中,王强同学6s末的速度为9.2m/s,10s末到达终点时的速度为10.4m/s,则他在比赛中的平均速度大小为 |
[ ] |
A.9.8m/s. B.10.4m/s C.9.2m/s D.10.0m/s |
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