单选题{{I}} Questions 15-18 are based on the following conversation. You now have 20 seconds to read the questions 15-18.{{/I}}

单选题How can a urine test show a patient may have a vitamin deficiency?

单选题Every ten years there is a national census to count the number of people. The Census Office asks every household to answer questions on a census form. The census counts people by the kind of housing they live in, the country in which they were born, and the kind of job they do and how they travel to work. Census results are used by a great many people and are available to everyone in many ways. For example, in order to work out present and future needs we must know how people are housed now, and the sizes and ages of their families. For hospitals, schools and other local services, the size of annual grants made by the Government to these services depends largely on the numbers and needs of people in the area. Many of the figures come from the census. In order to work out future spending for pensions, we need to know people's ages, how many are men and how many are women, whether they are single or married, and the size of the family. The census shows how many people have moved from one area to another and how the local workforce is changing. This information is used when factories, offices, shops, public transport and places for leisure are being planned. The census is taken in order to provide figures about the nation as a whole. It does not give information about any named person, family or household. Names and addresses are needed to take the census accurately, but they are not fed into the computer. After the census, the forms are locked away and will not be released to anyone outside the Census Office for 100 years. The answers you give on your census form will be treated secretly. No one outside the Census Office will see your completed form, but if you refuse to complete your form properly, you may be taken to court and the form could be produced as evidence. Everyone working on the census is required to keep it secret and can be prosecuted if he or she improperly reveals information.

单选题The ocean bottom — a region nearly 2.5 times greater than the total land area of the Earth — is a great frontier that even today is largely unexplored and unknown. Until about a century ago, no one had access to the deep-ocean floor, which was hidden under waters over 3,600 meters deep. To humans, the deep-ocean bottom, totally without light but with intense pressures hundreds of times greater than at the Earth's surface, is an unfriendly environment, in some ways as forbidding and remote as loneliness of outer space. Although researchers have taken samples of deep-ocean rocks and deposits for over a century, the first detailed global investigation of the ocean bottom did not actually start until 1968, with the beginning of the National Science Foundation's Deep Sea Drilling Project (DSDP). Using techniques first developed for the offshore oil and gas industry, the DSDP's drill ship, the Glomar Challenger, was able to maintain a steady position on the ocean's surface and drill in very deep waters, collecting samples of deposits and rocks from the ocean floor. The Glomar Challenger completed 96 voyages in a 15-year research program that ended in November 1983. During this time, the drill ship covered 600,000 kilometers and took almost 20,000 samples of sea-bed rocks and deposits at 624 drilling sites around the world. The samples have allowed scientists to rethink what the planet looked like hundreds of millions of years ago and to calculate what it will probably look like millions of years in the future. The samples have also produced information related to understanding the world's past climates. Deep-ocean deposits provide a climatic record tracing back hundreds of millions of years, because they are largely isolated from the erosion (侵蚀) and the intense chemical and biological activity that rapidly destroy much land-based evidence of past climates. This record provided insights into the patterns and causes of past climatic change — information that may be used to predict future climates.

单选题{{I}} Questions 14-19 are based on the following conversation. You now have 30 seconds to read the questions 14-19.{{/I}}

单选题Whatdidthemanthinkofthefoodattheschoolrestaurant?

单选题According to Hellman, we know that ______.

单选题{{I}} Questions 22～25 are based on the following dialogue.{{/I}}

单选题 {{B}}Text{{/B}} {{U}} (26) {{/U}}Space Agency is planning to{{U}} (27) {{/U}}a spacecraft to the planet Mars. The spacecraft will be called Mars Observer. The project was to have{{U}} (28) {{/U}}place in 1990. But it has been postponed. The Space Agency now{{U}} (29) {{/U}}to send the spacecraft to Mars in 1992. The Mars Observer is to{{U}} (30) {{/U}}from an America's space shuttle. It will then{{U}} (31) {{/U}}around tile North and South Poles of Mars. The spacecraft will have cameras to{{U}} (32) {{/U}}pictures of the atmosphere and surface of Mars. Its major task is to look{{U}} (33) {{/U}}signs of life. The last voyage{{U}} (34) {{/U}}Mars was in 1976. That was{{U}} (35) {{/U}}the two American Viking spacecrafts land- ed on the planet. The next voyage was planned{{U}} (36) {{/U}}1988 by the Soviet Union. America's Mars Observer Project will{{U}} (37) {{/U}}about $ 25.000.000. The high cost is one reason the Space Agency postponed the project. A{{U}} (38) {{/U}}of scientists have criticized that decision. Carl Sagan of Cornell university{{U}} (39) {{/U}}it "a great mistake". And the head of the Planetary Society said the project should not be postponed now{{U}} (40) {{/U}}it appears to{{U}} (41) {{/U}}support in Congress. Congress must{{U}} (42) {{/U}}money for it. Some scientists have proposed a solution that would save{{U}} (43) {{/U}}time and money. They say the Mars Ob- server be launched in 1990{{U}} (44) {{/U}}planned, but on a traditional rocket{{U}} (45) {{/U}}of the space shuttle.

单选题The expression "get across to children" in the last paragraph probably means______.

单选题 {{B}}Darry{{/B}} Darry is 45 years old and a mother of three children. Jeff, the oldest, is a junior at a state university. Nora is 17 and in her senior year of high school. The youngest child, Kevin, is 13 and in eighth grade. Her husband Bob is a sales representative for a pharmaceutical firm. Bob has been transferred many times during his career which has caused the family to move often. But now he is based at the company' s home office. She worked as a nurse before she became a mother, she worked on and off as part-time nurse for a home nursing agency while she was raising the children. One of her regrets is that she never was able to attain a college degree. She tried many times to take a night class while the children were younger. However, Bob' s travel schedule and the hassle of finding baby sitters became major barriers. Lately, she has considered returning to school. There is a community college 20 minutes from her home. She doesn' t know what program of study she would like to pursue. Her one major reservation is her concern for Kevin, the youngest. She also worries about Nora, who lately has been giving too much attention to her social life and less to her studies. {{B}}Sun{{/B}} Sun is a 76-year-old stroke victim. At the age of 70, she was stricken with a massive stroke that left her paralyzed on the right side and without speech. Sun could comprehend messages most of the time but could not express her feelings verbally. Before the stroke she worked part-time at the Chicago Cultural Center, attended lessons at the Art Institute of Chicago, and pursued the study of piano at the Fine Arts Conservatory of Chicago. She cherished her family. The most important people in her life were her son Ted and her daughter Mafia. {{B}}Ye Min{{/B}} Ye Min is 69 years old. She recently became widowed. Ye Min had been married to her husband Walter for 49 years. Walter died suddenly from a heart attack. Ye Min and Walter had a very good marriage. They were planning a cruise for their fiftieth wedding anniversary. She has three adult children: Sarah, 46 years old, David, 44 years old, and Justin,32 years old. Sarah and David are both married and are raising families. Justin is single. She has a part-time job at a local bakery. She works three times a week as a salesperson. Her life has changed greatly since Walter died. Friends who have their spouses seldom include Ye Min in their social plans since Walter died. Although Ye Min and Walter were close, she also has thought of herself as highly independent. She has ambivalent feelings about living alone.{{I}} Now match each of the persons with the appropriate statement. Note: there are two extra statements. {{/I}} {{B}}statements{{/B}} [A] Nothing is more important than marriage and family for her. [B] She sacrificed a lot of herself for her children and family. [C] She had been taking an active part in life before she became disabled. [D] She had too many worries. [E] She used to have a good marriage.