要测亮出一张普通邮票的质量，下列方案中可行的是                       (      )                    

在“1，﹣0.3，+ $\frac{1}{3}$ ，0，﹣3.3”这五个数中，非负有理数是____．（写出所有符合题意的数）

在一些新建办公大楼内外，常见大理石、花岗岩或金属等材质的“镇邪兽”“转运石”和“风水球”。这种现象在哲学上属于（  ）

    I used to be a very self-centered person, but in the past two years I have really changed. I have started to think about other people 1 I think about myself. I am happy that I am becoming a 2 person.

    I think my change started when I was at Palomar College. At first, I just wanted to get my 3 and be left alone. I thought I was smarter than everyone else, so I hardly ever 4 to anyone in my classes. By the end of my first semester, I was really 5. It seemed as if everyone but me had made friends and was having fun. So I tried an experiment. I started asking people around me how they were doing, and if they were having trouble, I offered to help. That was really a big 6 for me. By the end of the year, I had several new friends, and two of them are still my best friends today. 

    A bigger cause of my new 7, however, came when I took a part-time job at a Vista Nursing Home. One old lady there who had Alzheimer's disease(老年痴呆症) became my 8. Every time I came into her room, she was so 9 because she thought I was her daughter. Her real daughter never 10her, so I took her place. She let me 11 that making others feel good made me feel good, too. When she died, I was heartbroken, but I was very grateful to her.

    I think I am a much 12 person today than I used to be, and I hope I will not 13 these experiences. They have 14 me to care about other people more than about myself. I 15 who I am today, but I could not say that a few years ago.

***曾经总结道“自1840年起，几乎世界上所有的帝国主义国家侵略过我们，每一次战争几乎都以中国战败、签订丧权辱国的条约而告终。”改变了这种局面的是