$\frac{3}{5}$ ____ $\frac{13}{15}$           $\frac{5}{12}$ ____ $\frac{7}{20}$          $\frac{5}{6}$ ____ $\frac{4}{9}$

$\frac{3}{8}$ ____ $\frac{9}{24}$          $1\frac{1}{12}$ ____ $\frac{5}{4}$          $\frac{5}{18}$ ____ $\frac{7}{12}$

阅读下面的古诗，回答相关问题。

                                                                                                            北陂杏花  

                                                                                                              王安石
                                                                                   一陂春水绕花身，花影妖娆各占春。
                                                                                   纵被春风吹作雪，绝胜南陌碾成尘。