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执行如图所示的程序框图,如果输入a=1,b=2,则输出的a的值为 .
执行如图所示的程序框图,如果输入a=1,b=2,则输出的a的值为
.
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=( )
A.
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B.
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C.
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D.
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已知
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,
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是单位向量,
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•
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=0.若向量
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满足|
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-
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-
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|=1,则|
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|的最大值为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124315745723487/SYS201310251243157457234007_ST/9.png)
B.
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C.
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D.
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已知正方体的棱长为1,其俯视图是一个面积为1的正方形,侧视图是一个面积为
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的矩形,则该正方体的正视图的面积等于( )
A.
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B.1
C.
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D.
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