阅读下面的诗歌，完成后面的题目。

                                                                                                        江 上

                                                                                                 （宋•王安石）
                                                                                                 江北秋阴一半开，

                                                                                                 晚云含雨却低徊。

                                                                                                 青山缭绕疑无路，

                                                                                                 忽见千帆隐映来。

下列关于基因工程的说法正确的是（    ） 

某校男子足球队的年龄分布如图所示，则根据图中信息可知这些队员年龄的平均数，中位数分别是（　　）