阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。
Some years ago ,I was at a subway station in Los Angeles waiting in line to buy a ticket. As Istood there I saw a young man asking people for money so that he could buy hisbreakfast. Most of the travelers simply ____ (ignore) the young man or gave ____(he) a dirty look, yet a well-dressedmiddle-aged man reacted differently. When ____ (approach) by the young man, the gentlemanlooked ____at him and quietlyasked, “How much will you need?” I couldn’t hear ____the young man said but watched as thegentleman pulled several ____(note)from his wallet and ____ (calm) placed them in the young man’s hands.
I don’t know whether the young man actually used the money forhis breakfast or for ____purposes.What I do know is that I witnessed two different reactions to the samesituation. I saw people who ____(be) either afraid or annoyed. Andthen I saw the gentleman who was not afraid and treated the homeless young manas though he were a brother. I decided then and there that, even though we haveto be____(care) in this world, Iwould rather be like the gentleman.
达到平衡，
和
随时间变化的关系如下图所示。下列有关叙述正确的是
