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In the following text, some sentences have been removed. For Questions 41-45, choose the most suitable one from the list (A、B、C、D、E、F、G……) to fit into each of the numbered blank. There are several extra choices, which do not fit in any of the gaps. (10 points) At the end of the fifteenth century, celestial navigation was just being developed in Europe, primarily by the Portuguese. Prior to the development of celestial navigation, sailors navigated by "deduced"(or "dead") reckoning, hereafter called DR. This was the method used by Columbus and most other sailors of his era. In DR, the navigator finds his position by measuring the course and distance he has sailed from some known point. Starting from a known point, such as a port, the navigator measures out his course and distance from that point on a chart, pricking the chart with a pin to mark the new position. Each day"s ending position would be the starting point for the next day"s course-and-distance measurement. (41)______. The ship"s speed was measured by throwing a piece of flotsam over the side of the ship. There were two marks on the ship"s rail a measured distance apart. When the flotsam passed the forward mark, the pilot would start a quick chant, and when it passed the aft mark, the pilot would stop chanting. The pilot would note the last syllable reached in the chant, and he had a mnemonic that would convert that syllable into a speed in miles per hour. This method would not work when the ship was moving very slowly, since the chant would nm to the end before the flotsam had reached the aft mark. (42)______. Columbus was the first sailor (that we know of) who kept a detailed log of his voyages, but only the log of the first voyage survives in any detail. It is by these records that we know how Columbus navigated, and how we know that he was primarily a DR navigator. (43)______. If Columbus had been a celestial navigator, we would expect to see continuous records of celestial observations; but Columbus"s log does not show such records during either of the transatlantic portions of the first voyage. It has been supposed by some scholars that Columbus was a celestial navigator anyway, and was using unrecorded celestial checks on his latitude as he sailed west on his first voyage. (44)______. In other words, if Columbus were a celestial navigator, we would expect to see a sense of small intermittent course corrections in order to stay at a celestially determined latitude. These corrections should occur about every three or four days, perhaps more often. But that is not what the log shows. (45)______. Only three times does Columbus depart from this course: once because of contrary winds, and twice to chase false signs of land southwest. In none of these cases does he show any desire to return to a celestially-determined latitude. This argument is a killer for the celestial hypothesis.A. Since DR is dependent upon continuous measurements of course and distance sailed, we should expect that any log kept by a DR navigator would have these records; and this is exactly what Columbus"s log looks like.B. On his return voyage in 1493, Columbus started from Samaria Bay on the north coast of Hispaniola, and he made landfall at Santa Maria Island in the Azores. We know his entire DR courses and distances between these two points, since they"re recorded in his log.C. In order for this method to work, the navigator needs a way to measure his course, and a way to measure the distance sailed. Course was measured by a magnetic compass. Distance was determined by a time and speed calculation: the navigator multiplied the speed of the vessel (in miles per hour) by the time traveled to get the distance.D. On the first voyage westbound, Columbus sticks doggedly to his magnetic westward course for weeks at a time.E. Could Columbus has corrected his compasses by checking them against the stars and thus avoids the need for course corrections This would have been possible in theory, but we know that Columbus could not have actually done this.F. Speed (and distance) was measured every hour. The officer of the watch would keep track of the speed and course sailed every hour by using a peg-board with holes radiating from the center along every point of the compass. The peg was moved from the center along the course traveled, for the distance made during that hour. After four hours, another peg was used to represent the distance made good in leagues during the whole watch. At the end of the day, the total distance and course for the day was transferred to the chart.G. In that case, as magnetic variation pulled his course southward from true west, he would have noticed the discrepancy from his celestial observations, and he would have corrected it.
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Human beings are animals. We breathe, eat and digest, and reproduce the same life (1)_____ common to all animals. In a biological laboratory, rats, monkeys, and humans seem very much the same. However, biological understanding is not enough: (2)_____ itself, it can never tell us what human beings are. (3)_____ to our physical equipment—the naked human body—we are not an (4)_____ animal. We are tropical creatures, (5)_____ hairless and sensitive to cold. We are not fast and have neither claws nor sharp teeth to defend ourselves. We need a lot of food but have almost no physical equipment to help us get it. In the purely physical (6)_____, our species seems a poor (7)_____ for survival. But we have survived—survived and multiplied and (8)_____ the earth. Some day we will have a (9)_____ living on the moon, a place with neither air nor water and with temperatures that mm gases into solids. How can we have done all these things Part of the answer is physical. (10)_____ its limitations, our physical equipment has some important (11)_____. We have excellent vision and hands that can (12)_____ objects with a precision unmatched by any other (13)_____ Most importantly, we have a large brain with an almost (14)_____ number of neural (15)_____. We have used this physical equipment to create culture, the key to our survival and success. If we live in the Arctic, we supply the warmth for our tropical bodies need (16)_____ clothing, shelter, and (17)_____ heat. If a million people want to live in a desert that supplies natural food for only a few hundred, we find water to grow food and (18)_____ deficits by transporting supplies from distant places. Inhabitants of our eventual moon colony will bring their own food and oxygen and then create an artificial earth environment to supply necessities. With culture, we can overcome our natural limitations. It was not always (19)_____ Our distant ancestors were just animals, faced with the limits of their physical equipment. They had no (20)_____ and lacked the physical Capacity to use it.
Considered by many to be one of the greatest statesmen of all time, Benjamin Franklin has, without a doubt, left an indelible mark on history for all time. The man who would come to impact the course of the United States" development came from the most humble of backgrounds. Born the fifteenth child of a candle maker in Boston, Massachusetts, young Benjamin only attended two years of formal schooling before entering the candle making business himself at the age of ten. After his stint in the candle shop, he worked in a printing shop for five years, educating himself all the while by constantly reading and writing. Franklin"s intellectual and political growth continued unabated for decades, with such notable achievements along the way as the famous "Poor Richard"s Almanac" which was used as a tool by farmers and as entertainment by more intellectual patrons. Also personally responsible for the founding of the first public library in the United States, the University of Pennsylvania, the fire department and police force of his state, young Franklin was seldom seen at rest, preferring to utilize his talents for the betterment of his community. He was particularly crucial in the formation of the new American republic after its war of independence from Britain, using his considerable intellectual clout to influence thinkers of the period and garner support for the revolution. In 1776, Franklin traveled to France on a diplomatic mission, the culmination of which was a strategic alliance that greatly assisted the ailing American military with France"s naval power. Franklin was still not satisfied to rest on his laurels after liberation from England was achieved, rather continuing on his rapid pace of accomplishments. In 1785 he returned to Pennsylvania to take part in the Constitutional Convention, and ended up writing a good deal of the constitution himself. Smaller feats were continually achieved, up until the time of his death on April 17, 1790. He was busy until the end, constantly working toward the betterment of humanity. A telling tribute is the fact that just two months prior to his death, he performed his last political action by signing a petition to Congress, which called for the abolition of the institution of slavery. The best title for this text would be"______"
When a disease of epidemic proportions rips into the populace, scientists immediately get to work, trying to locate the source of the affliction and find ways to combat it. Oftentimes, success is achieved, as medical science is able to isolate the parasite, germ or cell that causes the problem and finds ways to effectively kill or contain it. In the most serious of cases, in which the entire population of a region or country may be at grave risk, it is deemed necessary to protect the entire population through vaccination, so as to safeguard lives and ensure that the disease will not spread. The process of vaccination allows the patient"s body to develop immunity to the virus or disease so that, if it is encountered, one can fight it off naturally. To accomplish this, a small weak or dead strain of the disease is actually injected into the patient in a controlled environment, so that his body"s immune system can learn to fight the invader properly. Information on how to penetrate the disease"s defenses is transmitted to all elements of the patient"s immune system in a process that occurs naturally, in which genetic information is passed from cell to cell. This makes sure that, should the patient later come into contact with the real problem, his body is well equipped and trained to deal with it, having already done so before. There are dangers inherent in the process, however. On occasion, even the weakened version of the disease contained in the vaccine proves too much for the body to handle, resulting in the immune system succumbing, and, therefore, the patient"s death. Such is the case of the smallpox vaccine, designed to eradicate the smallpox epidemic that nearly wiped out the entire Native American population and killed massive numbers of settlers. Approximately one in 10,000 people who receives the vaccine contract the smallpox disease from the vaccine itself and dies from it. Thus, if the entire population of the United States were to receive the Smallpox Vaccine today, 3000 Americans would be left dead. Fortunately, the smallpox virus was considered eradicated in the early 1970"s, ending the mandatory vaccination of all babies in America. In the event of a re-introduction of the disease, however, mandatory vaccinations may resume, resulting in more unexpected deaths from vaccination. The process, which is truly a blessing, may indeed hide some hidden curses. The main purpose of the text is to______.
Human beings are animals. We breathe, eat and digest, and reproduce the same life (1)_____ common to all animals. In a biological laboratory, rats, monkeys, and humans seem very much the same. However, biological understanding is not enough: (2)_____ itself, it can never tell us what human beings are. (3)_____ to our physical equipment—the naked human body—we are not an (4)_____ animal. We are tropical creatures, (5)_____ hairless and sensitive to cold. We are not fast and have neither claws nor sharp teeth to defend ourselves. We need a lot of food but have almost no physical equipment to help us get it. In the purely physical (6)_____, our species seems a poor (7)_____ for survival. But we have survived—survived and multiplied and (8)_____ the earth. Some day we will have a (9)_____ living on the moon, a place with neither air nor water and with temperatures that mm gases into solids. How can we have done all these things Part of the answer is physical. (10)_____ its limitations, our physical equipment has some important (11)_____. We have excellent vision and hands that can (12)_____ objects with a precision unmatched by any other (13)_____ Most importantly, we have a large brain with an almost (14)_____ number of neural (15)_____. We have used this physical equipment to create culture, the key to our survival and success. If we live in the Arctic, we supply the warmth for our tropical bodies need (16)_____ clothing, shelter, and (17)_____ heat. If a million people want to live in a desert that supplies natural food for only a few hundred, we find water to grow food and (18)_____ deficits by transporting supplies from distant places. Inhabitants of our eventual moon colony will bring their own food and oxygen and then create an artificial earth environment to supply necessities. With culture, we can overcome our natural limitations. It was not always (19)_____ Our distant ancestors were just animals, faced with the limits of their physical equipment. They had no (20)_____ and lacked the physical Capacity to use it.
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