题目

阅读理解Frankly, I appreciate myself very much. Yes, I admit I'm in many aspects not as good as other people, but I don't think I'm always not good. When I find what I've done or written is okay, I'll remain pleased with myself for quite a few days, and if I receive praise for it, I'll even become so excited as to add a few words to reward myself.True, I'm not modest at all. People may call me conceited (自负的). But I think otherwise.I appreciate other people. I appreciate anything good. Isn't it unfair to forget appreciating myself while appreciating others?We Chinese generally tend t若|x-y+3|与|x+y-1999|互为相反数，求x+2yx-y的值