下面是《江城日报》的一篇报道：名爸关秀文的故事。阅读下面材料，回答下列问题。

   34岁时，他的结发妻子因病早逝，扔下一儿一女两个年幼的孩子。他担心两个孩子无法接受后妈，关秀文一个人又当爹又当妈，辛辛苦苦把两个孩子养大，两孩子相继考入大学。1973年春节，45岁的关秀文在邻居们的撮合下再婚，对方带来4个孩子，其中最大的12岁，最小的只有两个月。“我会把他们当自己的孩子看待……”善良的关秀文没有嫌弃他们，扛起了养育4个孩子的重任。一晃21年过去了，关秀文和4个继子女亲如一家，两个继子相继娶妻成家组成了幸福的小家。现在，关秀文已经81岁高龄了，一直住在继子大成家。关秀文的亲生儿女的条件都比较优越，多次要接老人去养老，但是关秀文执意不肯。面对众人的不解，关秀文笑着说：“这就是我的家，大成比亲生的对我还好，我哪儿都不去。”

如图，请你用直尺和圆规作出弧AB的对称轴．（不写作法，保留作图痕迹）．

    Jack Ma, founder of Alibaba Group, has become the richest man in China with a fortune of 150 billion yuan ($24.4 billion), according to the "Hurun Rich List 2014".

    Jack Ma was born in Hangzhou, Zhejiang Province. As a child, Mr. Ma was interested in English. He improved his English by volunteering as a tour guide. Later in his youth, he attended Hangzhou Normal University and graduated in 1988 with a bachelor's degree in English. He later became a teacher in English and International Trade at the Hangzhou Dianzi University. Then he set up his own translation company. In 1999, Mr. Ma founded Alibaba in his apartment in Hangzhou with 17 friends. He pointed out that there had never been an organization that is as large as Alibaba in the world. It welcomes about 100 million shoppers a day.

    Mr. Ma is often called China's Steve Jobs, Jeff Bezos or Bill Gates. He remains executive chairman of the company, but his decision focuses less on the blind wealth and more on improving the state of the world.