实数m、n在数轴上的位置如图所示,则|n-m|=
.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193831033681074/SYS201311011938310336810011_ST/images0.png)
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如图,在菱形ABCD中,AB=BD.点E、F分别在AB、AD上,且AE=DF.连接BF与DE相交于点G,连接CG与BD相交于点H.下列结论:
①△AED≌△DFB;②S
四边形BCDG=
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CG
2;③若AF=2DF,则BG=6GF.
其中正确的结论( )
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A.只有①②
B.只有①③
C.只有②③
D.①②③
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广安老城区一施工队对某路段进行改造,在工作一段时间后,因洪水灾害被迫停工几天,随后恢复施工,施工队加快了施工进度,仍在规定时间内完成了路段的改造任务.下面大致图象中,能反映未改造路段的里程数y(千米)与时x(天)的函数关系是( )
A.
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B.
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C.
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D.
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在△ABC中,若AC:BC:AB=7:24:25,则sinA=( )
A.
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B.
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D.
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如图,AB是⊙O的直径,C、D在圆上,∠BAC=28°,则∠D等于( )
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A.78°
B.68°
C.62°
D.72°
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