圆的周长与这个圆的直径的比是______．
圆的周长直径=π．
故答案为：π．
写出下列化学符号式：
①氧气______；②二氧化碳______③高锰酸钾______
④水______；⑤五氧化二磷______；⑥木炭______．
—Is that a ___________?
—Yes. There are kinds of beautiful shoes in it.Let's go and have a look.[ ]
A. fruit shop
B. clothes store
C. shoe store
D. book shop
