请以“怎能忘记”为题写一篇记叙文。

要求：（1）请认真审题，力求写出真情实感。（2）不少于600字，不要出现真实的校名、人名。（3）请工整规范地书写。

    A train stops at a station(车站). A young man wants to come out, but it is raining. A boy is standing under a big umbrella. The young man says to the boy，"Can you go and get us two hamburgers, one for you and one for me? Here are two dollars. " "Great！"says the boy and he goes to buy hamburgers. After some time, the boy is back. He is eating a hamburger. "Where is my hamburger？"asks the young man. "Oh, there is only one hamburger left(剩下). So I'm eating mine. Here is your dollar. "

 如图所示的电路中，电源电压保持不变．只闭合开关S，电流表的示数为0.1A；再闭合开关S₁，电流表的示数为0.5A．那么闭合S、S₁后，在相同的时间内，电流通过电阻R₁、R₂所做电功之比　____ ．

如图与下列哪一事件相关（　　）