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2017年公共英语五级考试阅读集训巩固习题
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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
短文解析
本文介绍了几种会放电的鱼。放电的鱼中，最为人所知的就是电鳐，它们脑部有一些细胞含有电板，触摸电板的两极就会放电，电击的强度取决于鱼的大小。还有一种著名的放电鱼就是电鳗，电鳗的放电强度还要大一些。电鳗的电流是从头部传到尾部的，放电器官是变化的肌肉。尼罗河中的鲶鱼和其他非洲淡水鱼的导电途径是从尾到头，虽然电流强度不如前两种鱼，但也不怎么令人舒服。放电的能力为这些鱼提供了防卫和进攻的本领，可以击退强敌。
答案及解析
61.A【解析】由文章第四段中的“Another famous example is the electric eel.This fish gives all even more powerful shock.”可知。
62.B 【解析】由第四段中的“The horses ale less affected than a man would be，and when the electric eels have exhausted themselves，they Can be caught without danger.”可知。
63.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。
64.C【解析】由文章第二段可知C不对，而A、B、D文中均提到了。
65.C【解析】由全文的语气来看，均是在解释、阐述事情，而不是descriptive或narrative，更不是critic。
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