题目

下列计算正确的是（　　）                                                                      A．a2a3=a6                    B．（﹣2ab）2=4a2b2                                       C．（a2）3=a5              D．3a3b2÷a2b2=3ab                                           答案：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．                                                    

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