题目

阅读下面材料，根据其内容和所给开头语续写两段，使之构成一篇完整的短文。Once there lived a smart boy named Eric. He always topped every subject in his class. However, he had one shortcoming－he never respected others. He was very rude to everyone and made fun of those who got less marks than him.“My dear, it is praiseworthy that you get good marks, but it is very bad to be a rude person,” advised his father.Eric replied with pride, “Being the first in everything is enough to make everyone respect me.”His father tried to explain, “If you don’t give 已知函数，（1）求f（x）的定义域；（2）判断函数f（x）的单调性，并用定义证明．