阅读下面的古诗，完成小题。
                                                                                                          山中
                                                                                                                   王维
                                                                                          荆溪白石出，  天寒红叶稀。
                                                                                          山路元无雨，  空翠湿人衣。

在下列各数中，无理数有____ 个．

$\sqrt[3]{2}$，$\frac{1}{6}$，$\sqrt{7}$，﹣π，﹣$\frac{3}{2}$，$\sqrt{2}$，$\sqrt{\frac{25}{9}}$，0，0.5757757775…（相邻两个5之间的7的个数逐次加1）．