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已知实数a,b∈R+,a+b=1,M=2a+2b,则M的整数部分是( ) A.1...
已知实数a,b∈R+,a+b=1,M=2a+2b,则M的整数部分是( )
A.1
B.2
C.3
D.4
考点分析:
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