增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（＼）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1)每处错误及其修改均仅限一词。

2)只允许修改10处，多者（从第11处起）不计分。

     I am the senior student. I appreciate make friends with people and I do my best to be on good term with everyone. But in last week I found that one of my friends told another classmate, saying that she disliked me and that she doesn't want to be my friend any longer. And by now she started playing a trick on me although I'm fat. I'm kind to him but why can't she be friend to me? As for losing the discouraged weight, should I don more exercise? Use pills? And do you know any other ways? Please give me some advice.

渭河平原是中国农业发达地区之一，下图为其形成示意图。读图完成下列各题。

某工厂第一年的利润为20（万元），第三年的利润y（万元），与平均年增长率x之间的函数关系式是(    )