多肉植物鸡冠掌通常利用落叶上长出的不定芽繁殖，这种繁殖类型是（  ）

假定你是李华，你校外籍教师Miss Rose常常在课余时间辅导你英语口语，使你在上周学校举行的英语演讲比赛中荣获第一名。为此，你决定写一封感谢信，对Miss Rose的帮助表示真诚的感谢。

注意：1)文章包括上述内容，可适当增加细节，以使行文连贯；

2)词数100左右；

3)信的开头和结尾已为你写好，但不计入总词数。

Dear Miss Rose,

    I am writing to you

    ……

    I'm looking forward to hearing from you.

Yours sincerely,

Li Hua

若式子 $\frac{\sqrt{x-2}}{x-3}$ 有意义，则x的取值范围为(   )

阅读下面短文，根据语境、音标或所给单词的提示，在每个空格内填入一个适当的单词。

    My name is Linda. I live in Yushancun. It's a ____ ˈkwaiət community. There are many old people ____ (live) here. Many families ____ young children live here, too. They are all kind ____ each other.

    There are a lot of tall buildings and small ____ (garden)in our community. My home is in an apartment building. Behind the building, there is a ____(sport) center. There are many shops and restaurants ____ kləʊs to my home. There is a community ____ 'sɜːvɪs center in our area. We can call it ____ help.

    People all love the community and we have a ____ (color) life here!

根据对话内容及问题选择正确答案（  ）