The discharge of the fish, is best known as the torpedo, they have some brain cells containing panels, the poles will discharge touch panels, shock strength on the size of the fish. There is a place that is famous fish eel, eel's larger discharge intensity. The electric eel is from the head to the tail current, discharge is the change of the muscle organ. The catfish in the Nile and other African freshwater fish are electrically conductive from the end of the tail, although the current intensity is not as good as the first two species, but not very comfortable. Provide a defensive and offensive ability to discharge capacity of these fish, can repel the enemy.
61.Which of the following call produce the strongest shock?
[A]The electric eel.
[B]The electric catfish.
[C]The newly—born electric torpedoes.
[D]The fully—grown electric ray.
62.Why are horses used to catch the electric eels?
[A]To frighten the eels.
[B]To exhaust the eels.
[C]To attract the eels.
[D]To stir the water.
63.The electric catfish has a different electric system in that___.
[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
64.Which of the following statements is not true?
[A]Electric fish come from different families.
[B]One can get a shock by touching the electric rays in two places.
[C]The electric plates in the rays are connected with the spinal cord.
[D]The electric catfish is edible.
65.The language of the passage is mostly___.
[A]descriptive
[B]narrative
[C]expositive
[D]critic
