In the United States, it is not unusual to be stopped by a police officer on the road.

听力原文： In the United States, the average age of a college student used to be between eighteen and twenty-six years old. Not any more. Over the years, this has changed. Now many colleges and universities boast a large number of non-traditional students.

Many of these non-traditional students are older than the traditional students. Senior citizens are joining the ranks of non-traditional students on campuses throughout the United States. These non- traditional students frequently work during the day and go to school at night or on weekends. They may have started college after they graduated from high school, but later, because of family, or work responsibilities, had their education interrupted.

Traditional Students benefit from having older students in their classes. Senior citizens are excellent role models for some younger students who may not take college as seriously as they should. Senior attend college or the university, not because they have to, but because they want to. Some senior citizens take individual college courses only for personal enrichment. Others attend college to fulfill their lifelong dream of earning college degrees.

(33)

A．Under the ages of eighteen.

B．Between the ages of eighteen and twenty-six.

C．Between the ages of twenty-six and fifty-six.

D．Over sixty-five years of age.

Between 1986 and 1992 in the United States, mortality due to coronary heart disease among white men 45 to 74 years of age decreased by 26 percent, continuing a trend that began in the mid-1960s. Americans are thus doing something right. But did fish consumption help? This is where the Health Professionals Follow-Up(起作用) Study comes in.

The study deals with the intake(摄影) of n-3 fatty acids and fish. The researchers calculated the intake of fish for 44,895 male health professionals—most of them dentists—in 1986 and kept track of their health status for the next six years. Surprisingly, the intake of n-3 fatty acids or fish in 1986 was not related to the risk of subsequent coronary disease. The number of participants was much larger than in other studies, and the methods and data analysis were solid. Also, measurements of fatty acids in adipose tissue showed that the questionnaire reliably ranked respondents according to their intake of 3 fatty acids.

The researchers carefully spell out the limitations of the study. First, two thirds of the men had greatly increased their intake of fish over the 10 years before 1986. Some of those increases could have occurred. Shortly before the base-line investigation in 1986, because the inverse relation between fish consumption and mortality due to coronary heart disease was first reported in 1985. Thus, data on fish intake may not reflect long term habits, and changes in fish intake during follow-up could also have attenuated an association with coronary disease. The authors performed separate analyses including only men who reported no change in their fish intake and again found no effect. However, it is hard for people to recall whether they changed their diet several years ago.

Second, the fish intake of these educated men was high and was more comparable with that of Norwegians or Japanese than with intake in the U.S. men studied previously. The epidemiologic data suggest that any beneficial effect is obtained with one or two servings of fish per week and that more is not better. Moreover, previous studies of fish intake have shown an association with the rate of mortality due to coronary disease, rather than with the incidence of nonfatal coronaty disease or coronary surgery. When seen in that light, there is some agreement between the present study and previous reports, because the risk of death from coronariy heart disease was about 25 percent lower among men who ate at least some fish than among those who ate no fish at all.

A third limitation of the study was that some of the men studied may have begun to eat fish, or may have eaten more, because they thought that they were at increased risk of a heart attack;the men in the highest 20 percent of the study group in terms of their in-take of n-3 fatty acids more frequently reported a family history of coronary disease or a personal history of high cholesterol levels than men who ate less fish.

The Harvard investigators concluded that increasing fish intake beyond one or two servings per week is unlikely to reduce the risk of coronary events substantially in men who are initially free of coronary disease. This is a prudent conclusion, and it could be extended to fish-oil capsules, which provide n-3 fatty acids in much larger amounts than are commonly consumed in food.

The findings of the Health Professionals Follow-up Study should somewhat dampen enthusiasm for fish and fish oil as a panacea against coronary disease. A little fish may still do some good, but more fish is not necessarily better.

Good diet helps prevent coronary heart disease.

A．Right

B．Wrong

C．Not mentioned

In the United States, the first day nursery was opened in 1854. Nurseries were established in various areas during the【C1】______ half of the 19th century; most of【C2】______ were charitable. Both in Europe and in the U. S. , the day nursery movement received great【C3】______ during the First World War, when【C4】______ of manpower caused the industrial employment of unprecedented numbers of women. In some European countries nurseries were estab- lished【C5】______ in munitions plants, under direct government sponsorship.【C6】______ the number of nurseries in the U. S. also rose【C7】______ , this rise was accomplished without government aid of any kind. During the years following the First World War,【C8】______ , Federal, State, and local governments gradually began to exercise a measure of control【C9】______ the day nurseries, chiefly by【C10】______ them and by inspecting and regulating the conditions within the nurseries.

The【C11】______ of the Second World War was quickly followed by an increase in the number of day nurseries in almost all countries, as women were【C12】______ called upon to replace men in the factories. On this 【C13】______ the U. S. government immediately came to the support of the nursery schools,【C14】______ $ 6,000,000 in July, 1942, for a nursery school program for the children of working mothers. Many States and local communities【C15】______ this Federal aid. By the end of the war, in August, 1945, more than 100,000 children were being cared【C16】______ in day care centers receiving Federal【C17】______ . Soon afterward, the Federal government【C18】______ cut down its expenditures for this purpose and later【C19】______ them, causing a sharp drop in the number of nursery schools in operation. However, the expectation that most employed mothers would leave their【C20】______ at the end of the war was only partly fulfilled.

【C1】

A．latter

B．late

C．other

D．first

In the United States, the first day-nursery was opened in 1854. Nurseries were established in various areas during the (1)_____ half of the 19th century; most of (2)_____ were charitable. Both in Europe and in the U.S. the day nursery movement received great (3)_____ during the First World War, when (4)_____ of manpower caused the industrial employment of unprecedented numbers of women.

In some European countries nurseries were established (5)_____ in munitions plants, under direct government sponsorship. (6)_____ the number of nurseries in the U.S. also rose (7)_____, this rise was accomplished without government aid of any kind. During the years following the First World War, (8)_____, Federal, State, and local governments gradually began to exercise a measure of control (9)_____ the day-nurseries, chiefly by (10)_____ them and by inspecting and regulating the conditions within the nurseries.

The (11)_____ of the Second World War was quickly followed by an increase in the number of day-nurseries in almost all countries, ms women were (12)_____ called upon to replace men in the factories.

On this (13)_____ the U.S. government immediately supported the nursery schools, (14)_____ $6,000,000 in July, 1942 for a nursery-school program for the children of working mothers.

Many States and local communities (15)_____ this Federal aid. By the end of the war, in August, 1945, more than 100,000 children were being cared (16)_____ in daycare centers receiving Federal (17)_____. Soon afterward, the Federal government (18)_____ cut down its expenditures for this purpose and later (19)_____ them, causing a sharp drop in the number of nursery schools in operation. However, the expectation that most employed mothers would leave their (20)_____ at the end of the war was only partly fulfilled.

A．latter

B．late

C．other

D．first