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The flying fox is not a fox at all. It is an extra large bat that has got a fox’s head, and that feeds on fruit instead of insects. Like all bats, flying foxes hang themselves by their toes when it rest, and travel in great crowds when out flying. A group will live in one spot for years. Some- times several hundreds of them occupy(占据) a single tree. As they return to the tree toward sunrise, they quarrel among themselves and fight for the best places until long after daylight.Flying foxes have babies once a year, giving birth to only one at a time. At first the mother has to carry the baby On her breast wherever she goes. Later she leaves it hanging up, and brings back food for it to eat. Sometimes a baby falls down to the ground and squeaks((尖叫) for help. Then the older ones swoop (俯冲) down and try to pick it Up. If they fail to do so, it will die. Often hundreds of dead baby bats can be found lying on the ground at the foot of a tree. At daybreak every day flying foxes begin to()
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We know that many animals do not stay in one place. Birds, fish and other animals move from one place to another at a certain time. They move for different reasons; most of them move to find food more easily, but others move get away form places that are too corwded.When cold weather comes, many birds move to warmer places to find food. Some fishes give birth in warm water and move to cold water to feed. The most famous migration(迁移) is probably the migration of the fish, which is called “salmon”. This fish is born in fresh water but it travels many miles to salt water. Then it gives birth and dies there. In northern Europe, there is a kind of mouse. They leave their mountain homes when they become too crowded. They move down to the low land. Sometimes they move all the way to the seaside, and many of them are killed when they fall into the sea.Recently, scientists have studied the migration of a kind of lobster(龙虾). Every year, when the season of bad weather arrives, the lobsters get into a long line and start to walk across the floor of the ocean. Nobody knows why they do this, and nobody knows where they go .So, sometimes we know why humans and animals move from one place to another, but at other times we don’t. Maybe living things just like to travel. The reason why the lobsters migrate is ()
Many teachers believe that the responsibilities for learning lie with the student. (61) a long reading assignment is given, instructors expect students to be familiar with the (62) in the reading even if they do not discuss it in class or take an examination. The (63) student is considered to be (64) who is motivated (激发) to learn for the sake of (65) , not the one interested only in getting high grades. Sometimes homework is returned (66) brief written comments but without a grade. Even if a grade is not given, the students is (67) for learning the material assigned. When research is (68) , the professor expects the student to take it actively and to complete it with (69) guidance. It is the (70) responsibility to find books, magazines, and articles in the library. Professors do not have the time to explain (71) a university library works; they expect students, (72) graduate students, to be able to exhaust the reference (73) in the library. Professors will help students who need it, but (74) that their students not be (75) dependent on them. In the United States, professors have many other duties (76) teaching, such as administrative or research work. (77) the time that a professor can spend with a student outside of class is (78) . If a student has problems with classroom work, the student should either (79) a professor during office hours (80) make an appointment. 70()
After practicing as a surgeon for several years, Dr. Giroux decided to apply for membership in the American College of Surgeons(美国外科医生学会)，a highly selective and distinguished(著名的) professional organization.As part of the application procedure(手续),Dr. Ginoux was asked to prepare a list of all the operations performed in the previous seven years. Slowly, as she worked on the long list, she began to feel uncertain. She began to question some of her decisions. Had she used the best technique in that case Maybe, in this case, she should have given one more test before operating On the other hand, maybe she should have... Would the doctors on the selection committee understand that, as the only trained surgeon in the area, she usually could not get advice from others and therefore, had to rely completely on her own judgmentFor the first time, Dr. Cinoux felt lonely and isolated. The longer Dr. Ginoux worked on the application forms, the more depressed she became. As hope faded, she wondered if a "country doctor" had a realistic chance of being accepted by the American College of Surgeons. When she was filling the application forms, Dr. Ginoux began to be ()
English is a mixture of many different languages. Because of this, the vocabulary of the English language is very large. It is much larger than almost any other language in the world.Many English words came from Latin, the old language of Rome, and Greek. From Latin we get words like "wine", "us" and "day". From Greek we have words such as "photograph"," Bible" and "ink". Because these two languages are extinct, the words have more often come through other languages such as French, or the German language. There are also words from both Greek and Latin combined— "television", for example, "tele" is Greek for "far" and "vision" comes from Lation meaning "seeing".Many common English words came from other different places. "tea" is from China, "banana" from West Africa, "potato" from the island of Hati(海地), in the West Indies, and "tomato" from Mexico. One reason why the English language has so many words from other languages is that many nations have invaded Britain before. Two thousand years ago Romans came from Italy, and stayed for over four hundred years. After they left, came the Anglos (盎格鲁人), Saxons (撒克逊人) and Jutes (朱特人) from the northern part of Germany. In the ninth and tenth century Scandinavians invaded the northern and eastern parts of the country. Finally, in the eleventh century William Normandy(诺曼底) came from France, and became the King of England. Thus the French civilization and the French language were introduced into Britain. The vocabulary of the English is large because ()
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