AM的长为1.2km，则M，C两点间的距离为（   ）

    There is a zoo near my house. I like ____  there. There are many ____  in it.
    Look! There is a koala ____  the tree. Isn’t he ____ ? Under the tree, there is a ____ . Her neck(脖子) is so long. She is a lovely girl. ____  is the panada? She is eating the bamboo(竹子). She's ____  shy. But the elephant is interesting. He is playing with kids with his____ nose. They are very funny. Look! In the pool, there are two dolphins. They are playing with ____  balls. ____  happy they are !

①长辈的呵护

②对艾滋病人的歧视

③老师的鼓励

④同学之间相互帮助

（2016•市中区一模）下列过程中没有发生化学变化的是（  ）