下列计算正确是( ) A.a3·a2=a6    B.a5+a5=a10          C.(- 3a3)2=

下列计算正确是(  )

A.a3·a2=a6    B.a5+a5=a10          C.(- 3a3)2=6a6      D.(a3)2·a=a7

答案

D

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