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如图,电灯P在横杆AB的正上方,AB在灯光下的影长为CD,AB∥CD,AB=2m...
如图,电灯P在横杆AB的正上方,AB在灯光下的影长为CD,AB∥CD,AB=2m,CD=5m,点P到CD的距离是3m,则点P到AB的距离是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101317514884388/SYS201311031013175148843018_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101317514884388/SYS201311031013175148843018_ST/0.png)
m
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101317514884388/SYS201311031013175148843018_ST/1.png)
m
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101317514884388/SYS201311031013175148843018_ST/2.png)
m
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101317514884388/SYS201311031013175148843018_ST/3.png)
m
考点分析:
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BF;②∠CHF=45°;③GH=
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BC;④DH
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A.1个
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正方形ABCD中,E、F分别为AB、BC的中点,AF与DE相交于点O,则
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=( )
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B.
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D.
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如图,正方形ABCD中,E为AB的中点,AF⊥DE于点O,则
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等于( )
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B.
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C.
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D.
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A.
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B.2
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D.1
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如图所示,在菱形ABCD中,对角线AC与BD相交于点O,OE∥DC交BC于点E,AD=6cm,则OE的长为( )
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