A:C2H6O只有一种结构
B:分子式符合C5H11Cl的化合物有6种
C:已知二氯苯有3种同分异构体,则四氯苯的同分异构体的数目为3种
D:菲的结构简式为 ,它与硝酸反应,可生成10种一硝基取代物
Hunan TV station is very popular among young people in China. Are you interested in it? Do you think it's good or bad? Some students had a discussion about this question. Here are some opinions.
Good
Nancy
I know a lot of great people who are introduced by Hunan TV station. They are good at singing, dancing and acting because they always spend plenty of time practicing these things. They should be our heroes.
Tommy
Every weekend I watch its different kinds of programs with my parents. And it helps my parents know about me and my favorite things. Besides, it's also a good way to relax after a week's schoolwork.
Bad
Lily
I don't like the program Supper Girl. It attracts too much of our attention. Many of us always talk about who is beautiful or who will win. Sometimes we even talk about it in class and forget our study. It's not a good thing for students.
Daniel
I don't think Hunan TV station is useful. Some hosts of some programs just try to play jokes on others or themselves. It's a waste of time. We can't learn anything from them. We should make a rule to keep students away from these boring programs.
____是 ____的 ____倍.
列式: ____÷ ____= ____