北宋仁宗景佑年间,广州每年都有蕃客(外国商人)携带妻儿前来居住,甚至购买田宅,与当地人杂居,突破了蕃坊(蕃商聚居区)的限制,这些蕃客“富者资累巨万”。这表明当时( )
A:坊市界限被打破
B:地域性商人群体出现
C:对外贸易的繁荣
D:外商开始在中国定居
有关对原子的说法正确的是()
I am Brad. I like scary movies and action movies. My favorite movie star is Jackie Chan. I think Jackie Chan is a great actor. He has a movie Who am I? It's a very successful action movie. It's exciting.
My name is Kelly. I am a girl. I like comedies and soap operas, but I don't like scary movies. I think they are scary. I think Beijing Opera is educational. On weekend, I often go to see it with my father. I can learn a lot about Chinese history.
I am Carlos. My favorite cartoon star is Mickey. I think Mickey Mouse is a great cartoon. I also like scary movies. I think they are very exciting.
I'm a girl. My name is Mary. On weekends, I often watch cartoons and talent shows on TV. I think they are wonderful and relaxing. I don't like sitcoms. They are boring.
根据表格内容,选择最佳答案。
圆的周长与它的直径的比值约是3.14。(判断对错)