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如图,修建抽水站时,沿着倾斜角为30°的斜坡铺设管道,若量得水管AB的长度为80...
如图,修建抽水站时,沿着倾斜角为30°的斜坡铺设管道,若量得水管AB的长度为80米,那么点B离水平面的高度BC的长为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190026912167865/SYS201311011900269121678007_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190026912167865/SYS201311011900269121678007_ST/0.png)
米
B.40
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190026912167865/SYS201311011900269121678007_ST/1.png)
米
C.40米
D.10米
考点分析:
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