It's amazing how one dollar can change the culture of a school.

    We have a1school of about 30 students. It is really full of2and pressure as most of the kids get good3and try to be the best ones. It's4except that a lot of us middle kids felt really pressured. We got the feeling that we are so selfish—it's every man for5.

    6,my friend and I set out to find a way to7the culture. We decided doing things for others was the only way to8our depression（沮丧）about school.

    On the first day of school we put a9folded into a heart into one of the leaders' lockers with a piece of paper that 10“ Buy yourself a snack.” We11to give away small gifts every day. We didn't know the 12it would have.

    People went 13over it and everyone was talking about who it might be doing the acts of kindness and 14that they should do something too. It is so much fun to see the 15on everyone's faces now! Lots of other people have started sharing16now too: Chocolate bars, cookies and money left17in the vending machine（自动售货机）.And lots of notes are on the thanks board saying: “thanks to whoever started.”

    Now I actually expect to go to school to have the chance to18people up. I hope kindness will19to the other schools.20anybody is struggling with being depressed  At school and work, I totally suggested doing acts of kindness.

太阳辐射的能量主要集中在（　　）

依次填入下列各句横线处的词语，最恰当的一项是（  ）
①某网站的调查结果显示，有三成民众相信会出现“世界末日”，这表明人类对宇宙的认识还很_____________。
②中国是诗的国度，那些千古_____________的诗章作为民族文化的精髓，涵养了一代又一代中国人的心灵。
③两汉以来，很多人在引用《论语》时“断章取义”，不惜_____________《论语》，用自己的学说附会它。