【正文】 structure and the eating habit in them 正確答案是 Passage 9 Several thousand years ago chickens were wild birds living in the jungles of southeast Asia. Early records tell us that the Chinese started to tame them around 1400 . Centuries later, in the 1600s, English colonists brought farm chickens to America. Today thousands of American farmers raise more than three billion chickens every year. Families of chickens are made up of roosters, hens, and baby chicks. The rooster, a fullgrown male chicken, is sometimes called the farmer39。s needs before the year 20xx D) 3% of the EEC39。s energy requirements even after the year 20xx. But he said that with a modest increase in the present sums, devoted by the EEC to this work it was possible that the breakthrough could be achieved by the end of the next decade. Mr. Gratz calculates that if solar energy only provided three percent of the EEC39。t know for sure because the numbers are so small. The proportion of girls to boys is high, but until there are many more testtube babies no one will know whether that39。 plates, were also showing signs of the disease. He then tried to isolate the germ he thought ,was causing the disease, but his experiments were interrupted by a hospital official, who claimed that the huskless rice, even though left over by the patients, was too good for chickens. It should be recooked and the chickens fed on cheap, coarse rice with the outer covering still on the grain. Eijkman noticed that the chickens began to recover on the new diet. He began to consider the possibility that eating unmilled rice somehow prevented or cured beriberi even that a lack of some ingredient in the husk might be the cause of the disease. Indeed this was the case. The element needed to prevent beriberi was shortly afterwards isolated from rice husks and is now known as vitamin B. The milled rice, though more expensive, was in fact perpetuating the disease the hospital was trying to cure. Nowadays, this terrible disease is much less mon thanks to our knowledge of vitamins. 16. Deficiencies of the various vitamins ______. A) cause identical diseases B) are not serious except in the case of vitamin C C) cause different diseases D) are often caused by scurvy 正確答案是 17. Fresh fruit and vegetables ______. A) contain more vitamin C than any other food B) decrease our resistance to colds C) contain every kind of vitamin D) increase our susceptibility to influenza 正確答案是 18. The disease 39。s interest. He does, however, see less cheating among the youngest students. Richard Dienstbier, psychology professor at the University of Nebraska in Lincoln, believes that society39。 Cloze Directions: There are 10 reading passages in this part. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A), B), C) and D). Passage 1 You want something you can39。re suffering a moral breakdown, Pinkard says. We39。s success. Starting next year, the foundation will paint chevrons and other patterns of stripes on selected roads around the country to test how well the patterns reduce highway crashes. Excessive speed plays a major role in as much as one fifth of all fatal traffic accidents, according to the foundation. To help reduce those accidents, the foundation will conduct its tests in areas where speedrelated hazards are the greatest curves, exit slopes, traffic circles, and bridges. Some studies suggest that straight, horizontal bars painted across roads can initially cut the average speed of drivers in half. However, traffic often returns to full speed within months as drivers bee used to seeing the painted bars. Chevrons, scientists say, not only give drivers the impression that they are driving faster than they really are but also make a lane appear to be narrower. The result is a longer lasting reduction in highway speed and the number of traffic accidents. 6. The passage mainly discusses ______. A) a new way of highway speed control B) a new pattern for painting highways C) a new approach to training drivers D) a new type of optical illusion 正確答案是 7. On roads painted with chevrons, drivers tend to feel that ______. A) they could avoid speedrelated hazards B) they are driving in the wrong lane C) they should slow down their speed D) they are approaching the speed limit 正確答案是 8. The advantage of chevrons over straight, horizontal bars is that the former ______. A) can keep drivers awake B) can cut road accidents in half C) will have a longer effect on drivers D) will look more attractive 正確答案是 9. The American Automobile Association Foundation for Traffic Safety Plans to ______. A) try out the Japanese method in certain areas B) change the road signs across the country C) replace straight, horizontal bars with chevrons D) repeat the Japanese road patterns 正確答案是 10. What does the author say about straight, horizontal bars painted across roads? A) They are falling out of use in the United States. B) They tend to be ignored by drivers in a short period of time. C) They are applicable only on broad roads. D) They cannot be applied successfully to traffic circles. 正確答案是 Passage 3 Oceanography has been defined as the application of all sciences to the study of the sea. Before the nieenth century, scientists with an interest in the sea were few and far between. Certainly Newton considered some theoretical aspects of it in his writings, but he was reluctant to go to sea to further his work. For most people the sea was remote, and with the exception of early intercontinental travelers or others who earned a living from the sea, there was little reason to ask many questions about it, let alone to ask what lay beneath the surface. The first time that the question what is at the bottom of the oceans had to be answered with any mercial consequence was when th