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复数1+i(i为虚数单位)的模等于( ) A. B.1 C. D.
复数1+i(i为虚数单位)的模等于( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102253406039873/SYS201311031022534060398000_ST/0.png)
B.1
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102253406039873/SYS201311031022534060398000_ST/1.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102253406039873/SYS201311031022534060398000_ST/2.png)
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