下列计算正确的是（ ）                             

下列计算正确的是（　　）                                                                     

A．a²a³=a⁶                    B．（﹣2ab）²=4a²b²                                      

C．（a²）³=a⁵              D．3a³b²÷a²b²=3ab                                          

B【考点】整式的除法；同底数幂的乘法；幂的乘方与积的乘方．                  

【分析】根据同底数幂的乘法、积的乘方、幂的乘方、整式的除法，即可解答．                 

【解答】解：A、a²a³=a⁵，故正确；                                                         

B、正确；                                                                                          

C、（a²）³=a⁶，故错误；                                                                        

D、3a²b²÷a²b²=3，故错误；                                                                     

故选：B．                                                                                          

【点评】本题考查了同底数幂的乘法、积的乘方、幂的乘方、整式的除法，解决本题的关键是熟记同底数幂的乘法、积的乘方、幂的乘方、整式的除法的法则．