（2015•泰安）如图，△ABC是直角三角形，且∠ABC=90°，四边形BCDE是平行四边形，E为AC中点，BD平分∠ABC，点F在AB上，且BF=BC．求证：

耳朵在哪里

    青蛙妈妈让小青蛙到大自然中看一看，昆虫的耳朵都长在哪里。

    青蛙豆豆捉住一只蚊子，青蛙亮亮捧着一只小蝗虫，青蛙胖胖捉的是小蟋蟀，可它们都没有找到小昆虫的耳朵。

    “哈哈！哈哈！”小蚊子、小蝗虫、小蟋蟀忍不住齐声笑了起来：“你们怎么知道我们没有耳朵？”

    “我的触角就是耳朵！”小蚊子说。

    “我的耳朵长在肚子上！”小蝗虫拍拍自己的肚子说。

    “我的耳朵在这儿哩！”小蟋蟀举起前面的两条小腿说。

    小青蛙们听了，都不好意思起来。

Different countries have different customs. When you travel to another countries，please follow their customs，just as the saying goes，“             .”Very often people who travel to the United States forget to tip（付小费）.It is usual to tip porters who help carry your bags，taxi drivers and waiters. Waiters expect to get a 15% tip on the cost of your meal. Taxi drivers expect about the same amount.
In England，make sure to stand in line even if there are only two of you. It's important to respect lines there. It’s a good idea to talk about the weather. It's a favorite subject of conversation with the British.
   In Spain，it's a good idea to have a light meal in the afternoon if someone invites you for dinner. People have dinner very late，and restaurants do not generally open until after 9 pm.
   In Arab countries，men kiss one another on the cheek（脸颊）. Your host may welcome you with a kiss on both cheeks. It is polite for you to do the same.
   In Japan，people usually give personal or business cards to each other when they meet for the first time. When a person gives you a card，don't put it into your pocket right away. The person expects you to read it.Don't forget to be careful of your body language to express something In conversation. A kind of body language that is acceptable in one culture may be impolite in another.