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问题 问答题

如图所示，把一根直导体AB放在蹄形磁体的磁场里，接通电源，可观察到现象______，说明了______．

答案

解如图所示，把一根直导体AB放在蹄形磁体的磁场里，接通电源，可观察到的现象是：导体AB运动；

这是因为导体在磁场中受到了力的作用，故实验说明通电导体在磁场中要受到力的作用；

故答案为：导体AB运动；通电导体在磁场中会受到力的作用．

补全对话，情景问答

补全对话。

1. A: How are you?

    B: I'm ____1____, ____2____ ____3____. And you?

2. A: What's ____4____ name?

    B: My name ____5____ Lilian.

3. A: Sit down, please.

    B: ____6____ ____7____.

4. A: What's this in English?

    B: ____8____ a baseball.

5. A: Excuse ____9____! Are you Mr. Green?

    B: Yes, I ____10____.

6. Mike: Good morning!

    Tom: _____11___ ____12____, Mike. Do you know Kate?

    Mike: No. Who's Kate?

    Tom:: Come and ____13____ her. ____14____ ____15____ Kate. Kate, this is Mike. Mike is my good 

             friend. Kate: ____16____ ____17____ ____18____ ____19____, Mike.

    Mike: Nice to meet you, Kate. Is that girl your sister? You look the same.

    Kate: ____20____, we are twins.

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新中国成立初期起到临时宪法作用的文件：____________________
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