【正文】 sters. determine the entry pathway for a nonnative species is LEAST likely to depend on ［ A］ whether the species is considered to be a pest. ［ B］ whether the species enters by a closelychecked route. ［ C］ the rate at which the species extends geographically. 此資料來(lái)自企業(yè) ［ D］ the magnitude of the average number of the species. 40Which of the following may best express the chief purpose of the last paragraph? ［ A］ To explain the difficulties in tracing the pathways for longestablished species. ［ B］ To describe the events usually leading to the detection of a nonindigenous species. ［ C］ To identify the problems in assessing the weight of entry tracks for foreignies. ［ D］ To discuss the role of time lags and geographic expansion of species in species detection. Part B Directions: In the following article, some sentences have been removed. For Questions 41— 45, choose the most suitable one from the list A— G to fit into each of the numbered blank. There are two extra choices, which do not fit in any of the gaps. Mark your answers on ANSWER SHEET 1.(10 points) If you fail to stoke a fire,its flames at some time will the great fire of the Sun has burned nonstop for about 5000 million years with no apparent sign of going ).__ People in many cultures regarded the Sun as a miraculous gift from the gods,quite different from earthly fires and therefore not likely to fail them unless the gods were made now know that the Sun will eventually burn ).__ The Sun is posed of almost 75 per cent hydrogen and 25 per cent helium,plus much smaller amounts of oxygen,carbon,neon,nitrogen,magnesium,iron and is known as a main sequence star,one that shines by burning ).__ Thus, the Sun is both burning fuel and creating it. As the hydrogen store diminishes,its stock of helium light and heat ing now from the Sun were actually produced in its core many millions of years ago. 此資料來(lái)自企業(yè) When we burn fuel on a fire,we are converting matter— wood or coal— partly into more efficient the fire,the more heat it ).__This loss of hydrogen is slight when pared to the Suns enormous though it is posed of light gas,the Sun weighs some 300,000 times as much as the it loses about 4 million tones of matter every second. 45).__ If that sounds depressing,take heart!If the Sun switched off its power tomorrow,it would be ten million years years before its surface cooled sufficiently for anybody on Earth to feel the 5000 million years time,humans may well have found an answer to impending doom. ［ A］ We,one earth,soak up a tiny fraction— perhaps one hundredmillionth— of the Sun s vast rest of its awesome output of heat and light vanishes beyond the plas and into space. ［ B］ Scientists predict that the Sun has enough hydrogen to keep the fire going for another 5000 million years,about as long again as it has already burned. It will then gradually,like the heart of a dying fire,change color,turning in this case from white to yellow and red until,finally,as a black dwarf,it disappears from sight. ［ C］ The Earth s atmosphere,which normally shields it from the intense heat of the Sun,would drift away. Then the Earth’s oceans would boil and vanish in the cooling effect of its atmosphere and oceans,Earth itself would turn into a massive ball of fire. ［ D］ At the Sun’s heart,the hydro gen was once pressed with such force that it started a nuclear this giant furnace,the hydrogen is converted by nuclear fusion into another bustible gas,helium,in a reaction similar to that in an H bomb. ［ E］ Before its great fire dies,the Sun will turn into a red giant,bloated(swollen)to about 100 times its current will swallow up Mercury and then Venus,the nearest to it plas. ［ F］ The Sun is an extremely efficient furnace,but even so the helium it generates to keep the great fire going is only per cent of the hydrogen it other per cent vanishes in several forms of energy,mainly heat,light and X rays. 此資料來(lái)自企業(yè) ［ G］ Tests show that its temperature 1979,it seems to have cooled by one tenth of per cent,but that is not a sign that the great fire is going scientists believe that,because of the Sun’s volatile nature,this minor change may soon be reversed. Part C Directions: Read the following text carefully and then translate the underlined segments into Chinese. Your translation must be written clearly on ANSWER SHEET 2. (10 points) No painter can produce a good canvas without a broad knowledge of what has been painted before him, 46) no architect can plan a meaningful building except as he has spent time in considering the architecture of the past, and no writer can produce good writing without a sure sense of what has been acplished in the past within his form. Nor does one learn the past of his form only to adhere to it. Such an adherence, if overdone, would be a death in itself. I mean, rather, that it is impossible to venture meaningful innovation unless one knows what he is innovating from. 47) With no exception I am able to think of, the best innovators in our literature have been those who best knew their past tradition. I am saying simply that a writer must learn