Lucy Brown teaches English in a junior high school. She loves her students very much, and she works hard. She often tells them some interesting stories in class and her students like her, too.
     Yesterday, Lucy found some boys always made faces（做鬼脸）in class. She didn't want them to do that again, so she got all her students together and said, “Boys and girls, when I was young, I liked making faces in class, too. But one day, my grandmother told me not to do that again. She said, "If you make faces again, you will be ugly when you grow up." So you shouldn't do that again.”
Some students thought she was right, but some students didn't. One of the boys put up his hand. “Oh, Tom! What do you want to say?” asked Lucy.
    The boy stood up and said, “Miss Brown, you must regret（后悔）listening to your grandmother now.”

高铁酸钾（K₂FeO₄）具有强氧化性，是一种新型多功能水处理剂，其生产工艺流程如下：

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已知：K₂FeO₄在水溶液中易发生反应：4FeO₄^2﹣+10H₂O⇌4Fe（OH）₃+8OH^﹣+3O₂↑，下列说法不正确的是（　　）

在下面—段文字横线处补写恰当的语句，使整段文字语意完整连贯，内容贴切，逻辑严密。每处不超过15个字。

    谚语有云：“予人玫瑰，手有余香。”然而，①____，这样做是因为我们还没有认识到，给予是世界上最强大的力量，它对健康的好处超过你的想象。给予不仅能让人获得快乐、幸福的正面情绪，而且还能保护心脏，提高免疫力，降低抑郁和自杀风险，延长寿命等，总之，②____。其实，只要愿意，③____，你可以做慈善，帮助困难之人，你可以常怀感恩之心，谅解和尊重别人，你还可以绽放一个动人的微笑，说出一句由衷的赞美。