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在比例尺是1:8000的南京市城区地图上,太平南路的长度约为25cm,它的实际长...
在比例尺是1:8000的南京市城区地图上,太平南路的长度约为25cm,它的实际长度约为( )
A.320cm
B.320m
C.2000cm
D.2000m
考点分析:
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已知
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000638849534957/SYS201311030006388495349004_ST/0.png)
,则
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000638849534957/SYS201311030006388495349004_ST/1.png)
的值为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000638849534957/SYS201311030006388495349004_ST/2.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000638849534957/SYS201311030006388495349004_ST/3.png)
C.3
D.-3
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两个相似菱形边长的比是1:4,那么它们的面积比是( )
A.1:2
B.1:4
C.1:8
D.1:16
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下列计算正确的是( )
A.2
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000638849534957/SYS201311030006388495349002_ST/0.png)
+4
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000638849534957/SYS201311030006388495349002_ST/1.png)
=6
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000638849534957/SYS201311030006388495349002_ST/2.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000638849534957/SYS201311030006388495349002_ST/3.png)
=4
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000638849534957/SYS201311030006388495349002_ST/4.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000638849534957/SYS201311030006388495349002_ST/5.png)
÷
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000638849534957/SYS201311030006388495349002_ST/6.png)
=3
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000638849534957/SYS201311030006388495349002_ST/7.png)
=-3
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对于方程x
2-3x=0,下列说法中,正确的是( )
A.此方程不是一元二次方程
B.此方程是一元二次方程
C.此方程的常数项为1
D.此方程的常数项为-3
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二次根式
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000638849534957/SYS201311030006388495349000_ST/0.png)
中,x的取值范围是( )
A.x≤3
B.x=3
C.x≠3
D.x<3
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