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1、-高英期中-第 7 页Unit 1The record if eruptions subsequent to the one that occurred in A.D. are somewhat confused. It appears, however, that among the more violent were those of 203 and 427, during which fine ash was carried as far as Constantionple, as well as one in 512. There seems to be reasonable agre
2、ement that there were large outbreaks also in 685, 993, 1036, 1139, and 1500. Following this, there was an interval of relative quiescence during which time the mountain was again overgrown with vegetation. Then in 1111, there was a tremendous eruption. This ushered in the modern period of moderatel
3、y continuous eruption, highlighted by unusually strong ones in 1749, 1872, and 1906. The large eruption of 1906 has been fully described in a special monograph by Frank A. Perret, American volcanologist. The morning of April 4, he relates, began with the emergence of a massive white cloud of gas and
4、 steam into which there were shot great quantities of dark ash probably derived from demolition of the upper part of the cone. Residents of Naples, seven miles away, carried umbrellas to protect themselves from the volcanic sand. By midnight lava was issuing rapidly from a new fissure on the south s
5、ide of the cone as a low level. At 8 AM. On April 6 ,a new vent opened on the southeastern side of the cone only 1,800 feet above sea level. From this came a tremendous flood of very fluid lava which fountained at the vent and flowed rapidly down into Boscotrecase. According to Perret the volcano hu
6、mmed and trembled like a gigantic boiler under an overload of steam pressure. There was notable increase in earthquake activity and in the number of explosions in the crater. Electrical discharges were prominent in the ash clouds. The outstanding characteristic of this phase the eruption were the ex
7、plosive force and the quantity of highly lava. Another phase began with the emission of steam blasts of compressed gases which rushed up for many hours carrying relatively small quantities of ash and forming a gigantic cauliflower cloud seven miles in height. This was a vast continuous emission of g
8、as like a huge locomotive boiler blowing off. Beginning on April 8, the eruption passed into the “dark ash “ phase. Throughout this, gas clouds were so charged with volcanic debris as to be solid black. At each outback Naples and the surrounding country were covered by a pall of darkness. Unit 2 Jus
9、t how can you, a new college student, successfully carry out the ancient art of procrastination and thus carry on that noble tradition of not handing in assignment on time? The first and probably most effective means of procrastination in relation to writing an assignment is the inability to decide
10、on a decent topic. Frequently, this occurs when you are faced with a deadline, but you put off all thoughts of the dreaded assignment until the night before it is due. This leads to the next step: never do the assignment the day that it is assigned. Wait until tomorrow, or the weekend, when you will
11、 have plenty of time to write. Another point related to the previous one is never put the assignment higher on the totem pole of activities than , say, cleaning out the garage or changing the oil in your car. In other words, if there is something ese to do besides writing , do it! It is infinitely m
12、ore desirable to “play now, write later” than to do the opposite. Also, never be misled by those radicals who insist on doing assignments far before the deadline; it is they who will try to pressure you into the sinful temptation of being ready ahead of time with a completed assignment. So, in closi
13、ng this easy “How to” lesson on procrastination, the main point can be summed up: “Ill do it later.” If you use this as a guideline for later efforts not to do assignments, you can be assured of the satisfaction of sweating it out while the irresponsible student seated next to you glumly ponder the
14、task of handing his paper in on time-a fate fit for neither man, nor beast, nor typical student.Unit 4Most casual visitors to zoos are convinced, as they stroll from cage to cage, that the antics of the inmates are no more than an obliging performance put on solely for their entertainment. Unfortuna
15、tely for our consciences, however, this sanguine view of the contented, playful, caged animal could in many cases be hardly farther from the truth. Recent research at London Zoo has amply demonstrated that many caged animals are in fact facing a survival problem as severe as that of their cousins in
16、 the wild-a struggle to survive, simply, against the monotony of their environment. Well fed, well housed, well cared for, and protected from its natural enemies, the zoo animal in its super-Welfare State existence is bored, sometimes literally to death. The extraordinary and subtle lengths to which
17、 some animals go to overcome this problem, and the surprising behaviour patterns which arise as a result, were vividly described by Dr Desmond Morris (Curator of Mammals, London Zoo) at a conference on The biology of survival held in the rooms of the Zoological Society. As he and other speakers poin
18、ted out, the problem of surviving in a monotonous and restricted environment is not confined to the animal cage. Apart from the obvious examples of human prisoners or the astronaut, the number of situations in which human beings have to face boredom and confinement for long stretches is growing rath
19、er than decreasing. More to the point, many of the ways in which animals respond to these conditions have striking analogies in many forms of obsessional or neurotic behaviour in humans: the psychiatrist could well learn from the apes.Unit 5Scientists have taught a parrot English. So what? This time
20、, it seems, the bird not only says the words but also understands them. Alex, an African grey parrot residing at Americas Purdue University in Indiana, has a vocabulary of about 40 words with which he identifies, requests and sometimes refuses more than 50 toys. He seems to manipulate words as abstr
21、act symbols in other words, to use a primitive form of language. In many birds, communication takes the form of simple, stereotyped signals. Some birds, like parrots, are capable of learning huge repertoires of phrases by mimicking each other or other species. But, until now, there has been no evide
22、nce that any bird could make the big leap to associating one sound exclusively with one object or quality. Alex can. Dr Irene Pepperberg, his trainer, exploited the natural curiosity of the parrot to teach him to use the names of different toys. The trainer and an assistant play with the toys and as
23、k each other questions about them. To join in, the parrot has to compete for the trainers attention. The results have been spectacular. Alex rapidly learned to ask for certain objects, identifying them by words for shape, colour and material (e.g. three-cornered green paper, or five-cornered yellow
24、wood). He is asked to repeat words until he gets them right and is then rewarded by being given the object to play with. Dr Pepperberg believes it is important that the bird is not rewarded with food, because that would make him think of words as ways of getting treats rather than as symbols for obj
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