Which of the following can produce the strongest shock? Why are horses used to catch the electric eels?

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问题 Which of the following can produce the strongest shock?
Why are horses used to catch the electric eels?

选项 A、to frighten the eels.
B、to exhaust the eels.
C、to attract the eels.
D、to stir the water.

答案B

解析 由第四段中的"The horses are less affected than a man would be,and when the electric eels have exhausted themselves,they can be caught without danger"可知答案。
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