题目内容
幼儿园里小朋友沿着滑梯匀加速滑下,依次经过A、B、C三点。已知AB=3m,BC=5m,小球经过AB和BC两段所用的时间均为2s,则小球经过A、B、C三点时的速度大小分别是
A.1 m/s,1.5m/s,2m/s
B.1 m/s,2 m/s,3 m/s
C.1.5 m/s,2 m/s,2.5m/s
D.1.5 m/s,2.5m/s,3.5 m/s
A.1 m/s,1.5m/s,2m/s
B.1 m/s,2 m/s,3 m/s
C.1.5 m/s,2 m/s,2.5m/s
D.1.5 m/s,2.5m/s,3.5 m/s
B
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241259034641087.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824125903496682.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824125903511678.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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