不同物质根据不同标准，如用途、状态、性质、组成、构成等，具有很多种分类依据。根据所学知识，自拟分类标准，对以下物质进行分类（填序号）：
①盐酸　　　②碳酸钠溶液　　　③水银　　　④黄铁矿　　　⑤硫酸　　⑥碘酒
分类标准____  ，共包括三种物质为 ____ 。

加上标点符号。

①他喊____妹____小心____滑____说着自己就滑了一跤____

②他拍拍水淋淋的泥裤子____嘴里说____糟糕____糟糕____

读“非洲地理位置及气候类型分布图”，完成下列问题。

6月1日北京市颁布了《北京市控制吸烟条例》，对吸烟场所进行了严格的限制，体现了国家关注国民体质，提升国民素养的决心．下列关于吸烟的说法正确的是（　　）

    Three years ago, I got to know a poor lady named Rose. She had no children and lived alone. When I went to visit her, I always took her some1and food. One day she asked me to have coffee and delicious food for lunch at a restaurant near her home.

    2the way, I began to worry: I knew that she had no money, but if I offered to3the lunch, I was afraid I must hurt her.

    There were many people in the4and all of them were happy. Rose told me to sit and drink coffee by the window. Then she went into the5. I didn't know what happened. After about 20 minutes, she came out with some food. Then we started to enjoy the delicious food together. She told me that the restaurant allowed people to work for a meal6they had no money. The restaurant also might give them a free meal if they were not7to work, especially for the disabled.

    I 8remember the beautiful afternoon I shared with Rose. We had a meal, and Rose paid for it by her work. The weather was9and bright, and everyone's smile was warm and bright as well.

    I'm still thinking that life cannot be easy to us, but we can still do something for our friends and other people. The world will be10if everybody would like to share happiness with others.