试题与答案

电学课中,老师曾讲过“水果电池”,激发了某同学对苹果导电性能的探究: (1)你认

题型:实验题

题目:

电学课中,老师曾讲过“水果电池”,激发了某同学对苹果导电性能的探究:

(1)你认为苹果的导电性能可能与苹果的哪些因素有关?你的猜想是                         

(2)下表是该同学用伏安法,在一定电压下研究苹果的形状、甜度和通过的电流的实验数据:根据表中信息,把能得出的探究结论写出两条填写在横线上。

 苹果1一般甜苹果2较甜苹果3很甜
完整100(µA)200(µA)300(µA)
削了皮100(µA)200(µA)300(µA)
切掉一部分100(µA)200(µA)300(µA)
 

结论一:                                  

结论二:                                  

答案:

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(     ) 1.  How old is your teacher?                    A.  Yes, she is.

(     ) 2 . What color is your bag?                      B.  Sorry, I don't know.

( ) 3.  Is the girl tall?                                     C.  How do you do?

( ) 4.  How do you do?                                D.  It's yellow.

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( ) 6. Thanks very much.                               F. He is my friend.

(     ) 7. What are those in English?                   G. He is tall and strong.

(     ) 8. How is your teacher?                           H. Yes, I do.

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(     ) 10. What does your teacher look like?     J. You are welcome.

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