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一个运动员打尔夫球,若球的飞行高度y(m)与水平距离x(m)之间的函数表达式为y...
一个运动员打尔夫球,若球的飞行高度y(m)与水平距离x(m)之间的函数表达式为y=-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103001104127828308/SYS201311030011041278283007_ST/0.png)
(x-30)
2+10,则高尔夫球在飞行过程中的最大高度为( )
A.10m
B.20m
C.30m
D.60m
考点分析:
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