满分5 >
初中数学试题 >
一根水平放置的圆柱形输水管道横截面如图所示,其中有水部分水面宽0.8米,最深处水...
一根水平放置的圆柱形输水管道横截面如图所示,其中有水部分水面宽0.8米,最深处水深0.2米,则此输水管道的直径是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101655289223156/SYS201311031016552892231006_ST/images0.png)
A.0.4米
B.0.5米
C.0.8米
D.1米
考点分析:
相关试题推荐
圆O的半径为6cm,P是圆O内一点,OP=2cm,那么过点P的最短弦的长等于( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101655289223156/SYS201311031016552892231005_ST/0.png)
cm
B.8
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101655289223156/SYS201311031016552892231005_ST/1.png)
C.6
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101655289223156/SYS201311031016552892231005_ST/2.png)
cm
D.12cm
查看答案
过⊙O内一点M的最长的弦长为6cm,最短的弦长为4cm.则OM的长为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101655289223156/SYS201311031016552892231004_ST/0.png)
cm
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101655289223156/SYS201311031016552892231004_ST/1.png)
cm
C.2cm
D.3cm
查看答案
如图所示,以O为圆心的两个同心圆中,小圆的弦AB的延长线交大圆于C,若AB=3,BC=1,则与圆环的面积最接近的整数是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101655289223156/SYS201311031016552892231003_ST/images0.png)
A.9
B.10
C.15
D.13
查看答案
如图,顺次连接圆内接矩形各边的中点,得到菱形ABCD,若BD=8,DF=4,则菱形ABCD的边长为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101655289223156/SYS201311031016552892231002_ST/images0.png)
A.8
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101655289223156/SYS201311031016552892231002_ST/0.png)
B.8
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101655289223156/SYS201311031016552892231002_ST/1.png)
C.8
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101655289223156/SYS201311031016552892231002_ST/2.png)
D.8
查看答案
如图,已知⊙O中,半径OC垂直于弦AB,垂足为D,若OD=3,OA=5,则AB的长为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101655289223156/SYS201311031016552892231001_ST/images0.png)
A.2
B.4
C.6
D.8
查看答案