题目
题型:不详难度:来源:
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180256-50107.gif)
答案
解析
核心考点
试题【要在边长为16米的正方形草坪上安装喷水龙头,使整个草坪都能喷洒到水.假设每个喷水龙头的喷洒范围都是关径为6米的圆面,则需安装这种喷水龙头的个数最少是( )A.】;主要考察你对抛物线的定义与方程等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180226-62115.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180226-17523.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180226-55605.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180226-55605.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180226-90394.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180227-96617.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180227-11892.gif)
A 8 B 16 C 32 D 64
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180214-51600.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180215-72744.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180215-62397.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180215-57097.gif)
A.5 | B.6 | C.8 | D.10 |
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180053-51424.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180053-46530.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180053-26584.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180053-46530.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180016-58728.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180016-27334.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180016-54942.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180016-64535.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180017-29905.gif)
(Ⅰ)当
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180017-84587.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180017-34897.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180017-87848.gif)
(Ⅱ)记
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180018-75357.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180018-65398.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180018-78551.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180018-48541.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180019-98481.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180019-15178.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180019-80613.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180019-52341.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180019-48637.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180020-24453.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025180019-52341.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025175953-50899.gif)
A.![]() | B.![]() | C.![]() | D.![]() |
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