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(2002•连云港)县城建局对某一条街的改造工程要限期完成,甲工程队独做可提前一...
(2002•连云港)县城建局对某一条街的改造工程要限期完成,甲工程队独做可提前一天完成,乙工程队独做要误期6天,现由两工程队合做4天后,余下的由乙工程队独做,正好如期完成,若设工程期限为x天,则所列方程正确的是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232516037950644/SYS201310212325160379506019_ST/0.png)
=1
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232516037950644/SYS201310212325160379506019_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232516037950644/SYS201310212325160379506019_ST/2.png)
=1
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232516037950644/SYS201310212325160379506019_ST/3.png)
=1
考点分析:
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B.设2x
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C.设8x
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D.设
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232516037950644/SYS201310212325160379506015_ST/5.png)
,则y-
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(2002•东城区)方程
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的解为( )
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B.1,-2
C.0,
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232516037950644/SYS201310212325160379506014_ST/1.png)
D.0,3
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