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下列各式计算正确的是
2a2＋a3＝3a5
(3xy)2÷(xy)＝3xy
(2b2)3＝8b5
2x·3x5＝6x6
A．2a2＋a3＝3a5
B．(3xy)2÷(xy)＝3xy
C．(2b2)3＝8b5
D．2x·3x5＝6x6