在函数$y=\frac{1}{x-2}$中，自变量x的取值范围是（　　）

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。错误仅涉及一个单词的增加、删除或修改。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(\)划掉。

修改：在错的词下画一横线，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 grew up in Westley, California. After graduating with high school. I went to Beijing and started teaching in a kindergarten. I had never been to a city big as Beijing before. I fall in love with Chinese food. I would eat out at the different restaurant every night and practice my Chinese with local citizen. I suppose the air was clean back home, but my life in China was much more interesting. My most favorite part about living in Beijing was nothing that many other foreigners didn't like at all—the noise. I loved walking outside my door and hear the sounds of city life. Therefore, I'm back in Westley now, and all I hear is silence. I definitely miss Beijing.

____  ____  ____ ____ ____ ____ ____ ____ ____ ____ 

北京时间2016年1月20日23时27分，迎来农历二十四节气中的最后一个节气——大寒。大寒时节，“应景”的西伯利亚寒潮南下，冷得大家措手不及、叫苦不迭。从中央气象台的消息可以看到，20-23日，湖北、安徽、江苏、上海、浙江、江西将有大到暴雪，湖南、贵州等有冻雨。造成湖北、江西、湖南等地降水的天气系统及原因是（   ）