陈晶同学买了一根2000Ω粗细均匀的电阻丝给奶奶做了一个电褥子，奶奶用后说不太热，陈晶想了一下，截掉原长的1/4，奶奶使用后满意了．改造后电褥子的功率是多少？每分钟可以产生多少热？

补全对话，每空一词

J=Jenny  E= Emily    

J: Hello, Emily. Long time no see. Where did you go on  1  ？    

E:I went to London  2  my parents.    

J: Really? What do you think of London?    

E: It's a beautiful  3  .I like it very much.    

J：How was the  4   there?    

E: Oh, it  5   rainy or cloudy those days.    

J: Did you visit the Big Ben?    

E:Yes. I also went to a middle   6  .    

J: What about the  7   in that school?    

E:They are strict. Students there can't wear jeans  8     shirts. They have to wear  9   at school.    

J: We have to wear uniforms, too. Anything else?    

E: Let's talk  10   them later.