根据首字母提示补全单词。

1. I am making a r_____ for my classroom.

2. Mary Green has written many p______ books on gardening.

3. Sometimes I am glad to be a______.

4. Some people enjoyfishing as a h______.

5. The i______ are on the box.

6. We need to take part in a ______ with friends.

7. This year , I joined a rocket club in my city. It has about forty m_____.

8. We also give p______ for the best-built rocket..

9. The teacher tells them that they might o______ a stamp collecting club.

10. Who is the most interesting p_____ in your family.

关于感应电动势的大小，下列说法正确的是

A．跟穿过闭合电路的磁通量有关

B．跟穿过闭合电路的磁通量的变化大小有关

C．跟穿过闭合电路的磁通量的变化快慢有关

D．跟电路中电阻大小有关