有下列关系：

（1）名师出高徒；

（2）球的体积与该球的半径之间的关系；

（3）苹果的产量与气候之间的关系；

（4）乌鸦叫，没好兆；

（5）森林中的同一种树，其断面直径与高度之间的关系；

（6）学生与他（她）的学号之间的关系．

其中，具有相关关系的是____ ．

    Anne and Sue are good f____. They have the s____ age. They are both twenty-two. They both like sports. Most important, they both like new dresses. They usually go s____ together at weekends. Now they are in a c____ shop. There are d____ kinds of beautiful dresses. Anne wants a red dress. But Sue thinks the pink o____ is better.

    Every week, Julia would go to visit her grandparents. ①The grandfather would give each child a few coins and tell them to buy something they like. They would buy toys and candy. After they grew a little bit older, their parents thought that it was time for them to learn how to manage（管理）money. So the parents asked the children to think of ways to manage money.

    Ruben is the cleverest boy. He decided to earn money by buying and selling things. ②他得到了来自全家的支持。But Nico, the smallest child, still spent the money as usual. Ruben thought ③it was unfair and he stopped saving his money, too.

    For little Julia, she had a wonderful, secret plan. But ④她的父母对她感到非常失望. They thought Julia wasn't doing anything.

    One day, Julia came with a violin and played it for the family. Everyone was surprised. They knew that Julia liked the violin. ⑤but her family was too poor to afford the violin classes for her. So, Julia found a street violinist and asked his to teach her. In return, she gave his all her money. The violinist was deeply moved by Julia. He taught her for months and rent a violin to her. Then, Julia gave performances with the violinist in the street. By doing this, she earned enough money to pay for the violin.