题目：
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 the golden chain when I had to help people who__1__their way and parked in front of my house. I was growing tired of helping so many people. Almost every__2__I was awaken during a sound night's sleep and had to__3__someone out. Many times I was__4__by some penniless motorists who did not even thank me for the help that they received and some even complained that I could have done __5__. One day, a young man with a week-old beard climbed out of a__6__automobile. He had no money and no food. He asked if I could give him some__7__, offer him gasoline and a meal. I told him that if he wanted to work for me, he could cut the grass, but__8__the work wasn't necessary. Though sweaty and hungry, he worked hard.After working all day, he sat__9__to cool himself. I thanked him for his work and gave him the money he__10__. I then offered him some__11__money for the task particularly well done, but he shook his head, __12__. I never saw him again.He probably thought I helped him out that day, but that is not the__13__it was. I didn't help him, whereas he helped me to__14__people again to repay their trust in me. He helped me to once again want to do something for those who are__15__. I wish I could thank him for__16__some of my belief in the basic__17__of others and for giving me back a little of the__18__ I had lost. Because of him, I once again felt myself part of a golden chain of kindness that__19__us to others. I may have fed his body that day, but he fed my__20__. | ||||
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答案：C题目分析：能使干燥的蓝色石蕊试纸变红又褪色，说明该物质既具有酸性，也具有强氧化性，氯气、液氯和氯气的酒精溶液都煤油酸性，则答案选C。点评：该题是基础性试题的考查，试题基础性强，设计新颖，侧重...
