有下列几组物质，请将序号填入下列空格内：

A、CH₂=CH﹣COOH和油酸（C₁₇H₃₃COOH）    B、C₆₀和石墨

C、D、³⁵Cl和³⁷Cl

E、乙醇和乙二醇

①互为同位素的是　 ____　；

②互为同系物的是　 ____　；

③互为同素异形体的是 ____　；

④互为同分异构体的是　 ____　；

⑤既不是同系物，又不是同分异体，也不是同素异形体，但可看成是同一类物质的是 ____

    You want to know about my staying in America, right? Well, to tell you the truth, it is really an eye-opening experience to study here.
In China, I had English classes five times a week since fifth grade. However, I didn't know how different textbook English could be from everyday English until I came to Hotchkiss School, Connecticut.
When I first studied English, I was told to say,” I am fine” when people say “How are you?” But in the US, I found that people say, “I am good” or “I'm tired”.
    One day, someone greeted me with “What’s up?” It made me confused . I thought for a moment and then smiled because I didn't know what to say.
    Since then, I have discovered more and more differences between Chinese and US cultures.
    To my surprise, US girls spend a lot of time in the burning sun to get a tan(晒黑). However, in China, girls try every possible way to get their skin paler, or “whiter”.
    I was also surprised by how hardworking US students are.  In China, schoolwork is almost everything, so we study hard and that's it. But here, a “good” student gets good grades, does a lot for the public and plays sports or music.
    The kids here are so talented, I am starting to be sorry that I gave up playing the piano at an early age and that I have never thought about sports.

阅读材料，回答下列问题。

材料一：2016年12月16日起，华北、黄淮等地遭遇今年以来持续时间最长、范围广泛的雾霾天气。22日凌晨起，受冷空气影响及降水清除作用，华北等地的霾天气将自北向南逐渐减弱或消散。

材料二：下图为“2016年12月22日某时刻等压线分布示意图”。