由于铁磁物质的起始磁化曲线不一条（），因此铁磁物质的磁导率μ_爱下问搜题

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问题填空题

由于铁磁物质的起始磁化曲线不一条（），因此铁磁物质的磁导率μ不是（）。μ值是（）的函数

答案

参考答案：直线；常数；外磁场强度Η

单项选择题

Welcome to the Grand Center--the place for all the family

If you like sports, go to the sports center on the twenty-eighth floor. On the twenty-eighth floor, we have a ping-pong room. If you like films, go to the twenty--seventh floor and watch a film in the ABC Cinema.
If you like to eat, there are a lot of places in the Grand Center for you to go to. You can try Wonderful Restaurant. That’s a new restaurant on the twenty-first floor. Crazy Town ( a Sichuan restaurant)is on the twenty-third floor and there’s an American restaurant on the twenty-sixth. But don’t worry, children ! If you like other kinds of foreign food, you can go to the coffee shop on the first floor. It’s really great.
If you like to shop, there are the twelfth to the nineteenth floors. On the twelfth floor, for example, there’s AST World for computers and computer games. There’s a big store on the fifteenth floor for radios, TVs and CDs. And the nineteenth floor has sports stores and a supermarket.

On the nineteenth floor，you can______．
[A] buy spots things [B] play ping-pong [C] play computer games

And there’s Rose Hall for all you dance people ( for people over 14 years old). That’s on the top floor, of course. You can dance and sing all night.

名词解释

三监