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  3. Which of the following can produce the strongest shock? The electric catfish has a different electric system in that

Which of the following can produce the strongest shock? The electric catfish has a different electric system in that

admin2009-06-24  68
问题 Which of the following can produce the strongest shock?
The electric catfish has a different electric system in that
选项 A、current moves from the head to the tail.
B、current moves from the tail to the head.
C、current moves from the left to the right.
D、current moves from the right to the left.
答案B
解析 由文章倒数第二段第一句"The electric catfish of the Nile and of other African fresh waters has a different system again by which current passes over the whole body from the tail to the head"可知答案。
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