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为测量如图所示的上山坡道的倾斜度,小明测得图中所示的数据(单位:米),则该坡道倾...
为测量如图所示的上山坡道的倾斜度,小明测得图中所示的数据(单位:米),则该坡道倾斜角α的正切值是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101408135710790/SYS201311031014081357107023_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101408135710790/SYS201311031014081357107023_ST/0.png)
B.4
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101408135710790/SYS201311031014081357107023_ST/1.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101408135710790/SYS201311031014081357107023_ST/2.png)
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