平衡发展理论包括哪些理论？
参考答案：
临界最小努力命题论、低水平陷阱论、大推进论、贫困恶性循环论。均衡发展理论的两个缺陷：一是忽略了一个基本的事实，即对于一般区域特别是不发达区域来说，不可能具备推动所有产业和区域均衡发展的资本和其他资源，在经济发展初期很难做到的均衡发展；二是忽略了规模效应和技术进步因素，似乎完全竞争市场中的供求关系就能决定劳动和资本的流动，就能决定工资报酬率和资本收益率的高低。
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| Even though it was only October, my students were already whispering about Christmas plans. With each passing day, everyone became more 1 , waiting for the final school bell. Upon its 2 , everyone would run for their coats and go home, everyone except David. David was a small boy in ragged (破旧的) clothes. I had often wondered what kind of home life David had, and what kind of mother could send her son to school dressed so inappropriately for the cold winter months, without a coat, boots, or gloves. But something made David 3 . I can still remember he was always 4 a smile and willing to help. He always 5 after school to straighten chairs and mop the floor. We never talked much. He 6 just simply smile and ask what else he could do, then thank me for letting him stay and slowly head for home. Weeks passed and the 7 over the coming Christmas grew into restlessness until the last day of 8 before the holiday break. I smiled in relief (欣慰) as the last of them hurried out the door. Turning around, I saw David 9 standing by my desk. "I have something for you," he said and 10 from behind his back a small box. 11 it to me, he said anxiously, "Open it." I took the box from him, thanked him and slowly unwrapped (打开) it. I lifted the lid and to my 12 saw nothing. I looked at David's smiling face and back into the box and said, "The box is nice, David, but it's empty." "Oh, no, it isn't," said David. "It's full of love. My mum told me before she died that love was something you couldn't see or touch unless you know it's there." Tears filled my eyes 3 I looked at the proud dirty face that I had rarely given 4 to. After that Christmas, David and I became good friends and I never forgot the meaning 5 the little empty box set on my desk | ||||
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