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(2007•威海)下列各式计算正确的是( ) A. B. C. D.
(2007•威海)下列各式计算正确的是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110459848190655/SYS201310191104598481906007_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110459848190655/SYS201310191104598481906007_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110459848190655/SYS201310191104598481906007_ST/2.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110459848190655/SYS201310191104598481906007_ST/3.png)
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(2007•威海)下列计算正确的是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110459848190655/SYS201310191104598481906002_ST/0.png)
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=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110459848190655/SYS201310191104598481906002_ST/2.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110459848190655/SYS201310191104598481906002_ST/3.png)
+
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110459848190655/SYS201310191104598481906002_ST/4.png)
=4
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110459848190655/SYS201310191104598481906002_ST/5.png)
=3
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110459848190655/SYS201310191104598481906002_ST/6.png)
D.(1+
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110459848190655/SYS201310191104598481906002_ST/7.png)
)(1-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110459848190655/SYS201310191104598481906002_ST/8.png)
)=1
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