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(2008•双柏县)下列运算正确的是( ) A.x5+x5=x10 B.x5•x...
(2008•双柏县)下列运算正确的是( )
A.x5+x5=x10
B.x5•x5=x10
C.(x5)5=x10
D.x20÷x2=x10
考点分析:
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