【正文】 he upper, positive side of the an downwards to the negative, lower side.】 Generally it is necessary to touch the fish in two places, pleting the circuit, in order to receive a shock. 7. Usually you will not get a shock by touching the electric ray in one place only because ____. the current in one place is not strong enough to give a shock the fish‘s electric cells are filled with jellylike substance to plete the circuit, you have to touch the fish in two places a torpedo‘s electric cells contain more than one electric plates ③ The strength of this shock depends on the size of the fish, but newly born ones only about 5 centimeters across can be made to light the bulb of a pocket flashlight for a few moments, while a fully grown torpedo gives a shock capable of knocking a man down, and, if suitable wires are connected, will operate a small electric motor for several minutes. 8. The main idea of the third paragraph is that ____. a mature torpedo is capable of producing enough electricity to knock down a man B. the mass of the fish decides the intensity of electric power it generates the strength of shock given by a young electric ray can only light the bulb of a pocket flashlight to make full use of the energy produced by electric fish, suitable wires should be available ④ Another famous example is the electric eel. This fish gives an even more powerful shock. The system is different from that of the torpedo in that the electric plates run longitudinally(縱向 )and are supplied with nerves from the spinal(脊骨 )cord. Consequently, the current passes along the fish from head to tail. The electric ans of these fish are really altered muscles and like all muscles are apt (likely) to tire, so they are not able to produce electricity for very long. 9. The reason why the electric eel is able to give more powerful shock is that ____. the working system of the electric plates in the eel is the most effective the working system of the electric plates in the eel is far inferior to those in the torpedo pared with those in the torpedo, the working system of electric plates in the eel is more direct and efficient pared with other electric fish, the eel possesses much more electric plates ⑤ The power of producing electricity may serve these fish both for defense and attack.6. It can be seen from the passage that ____. the capacity to generate electricity is the distinctive characteristic of the fish the current travels in an upward direction from the positive side to negative side in torpedo‘s electric cells some fish can produce enough electricity to drive a number of electric motors D. the torpedo’s electric cells have a shape with six sides ideal title for this passage is ____. 11 The Eel B. Torpedo C. Electric Fish D. Electric Power electricity 發(fā)電 ...in different ways 以不同方式獲得? 擁有 side 負極的一面 side 正極的一面 substance 果凍一樣的物質 centimeters across 五厘米寬 down 擊倒，撞倒 current 電流 apt to 易于?的，有?傾向的 P312P2（太陽黑子 ） ★★ It seems to shine unchangingly, pouring out a constant level of light year after year. But the sun may not be nearly so stable as we suppose. It is now thought to move quickly and irregularly and change in longterm cycles, growing dimmer and then brighter with each passing year. Some even fear that its frequent changing behavior could have a great influence on the Earth39。s New Theory about the Earth39。s Presbyterian background on his life? A) It had almost no effect on his life. B) It promoted his interest in law. C) It fostered his love for the literature. D) It enabled him to bee a successful writer P342P1（廣告業(yè)） ★★ One of the most authoritative voices speaking to us today is, of course, the voice of the advertisers. It shouts at us from the television screen and the radio loudspeakers。 America made him ambassador to Spain. Irving‘s background provides little to explain his literary achievements. A gifted but delicate child， he had little schooling. He studied law but without zeal， and never did practice seriously. 3. What can be said about Irving39。s frequent changes have an influence on the Earth39。 and above all, skiers are warned not to ski in danger areas. 54. In areas where avalanches are known to happen ___ . (推理 題 ) A. local residents stay indoors when the weather is bad B. measures are taken to prevent serious avalanches C. small avalanches can easily be prevented D. skiers form themselves into a wall to keep the snow in position In spite of this, avalanches happen in unexpected areas and, of course, skiers ignore the warnings. The one fort to recreational skiers, however, is that avalanche incidents on the marked ski slopes are quite rare. No ski resort wants the image of being a death trap. 55. Although accidents do happen, skiers will be reasonably safe if ___. (推理 題 ) A. they stay on the officially approved slopes B. they ski only for pleasure C. they ski only at resorts D. they choose less crowded ski slopes 8 P277P2（分期付款） 10 月 12 號 In Western countries people have been using the installment plan since the first half of the twentieth century. Today, a large number of families in Great Britain buy furniture, household goods and cars by installments. In the ., the figure is much higher than in Great Britain, and people there spend over 10 percent of their ine on the installment plan. 41. Which of the following is NOT true about the installment plan? A. A lot of British families use the installment plan. B. More than 10 percent American families buy things on installments. C. Americans depend more on installment than British people do. D. Americans spend one tenth of their ine on installment buying. The price of an article bought on installments is always higher than