In E-R models, three components are entity, relationship and ___________.

One way that scientists learn about man is by studying animals, such as mice and monkeys.科学家了解人类的一种方法是研究如老鼠、猴子这样的动物。The scientists in this laboratory are

experimenting on mice. They are studying the relationship between diet and health. At this time, over one hundred experiments are being done in this laboratory.

In one of these experiments, the scientists are studying the relationship between the amount of food the mice eat and their health. The mice are in three groups. All three groups are receiving the same healthy diet. But the amount of food that each group is receiving is different. The first group is eating one cup of food each day, the second group is eating two cups, and the third group of mice is eating three cups.

After three years, the healthiest group is the one that is only eating one cup of food each day. The mice in this group are thinner than normal mice. But they are more active. Most of the day, they are running, playing with one another, and using the equipment in their cages. Also, they are living longer. Mice usually live for two years. Most of the mice in this group are still alive after three years.

The second group of mice is normal weight. They are healthy, too. They are active, but not as active as the thinner mice. But they are only living about two years, not the three years or more of the thinner mice.

The last group of mice is receiving more food than the other two groups. Most of the day, these mice are eating or sleeping. They are not very active. These mice are living longer than the scientists thought - about a year and a half. But they aren't as healthy. They're sick more often than the other two groups.

(1)、The scientists in the laboratory are studying the relationship between the amount of food and diet.

A：T

B：F

(2)、The first two groups are receiving the most food.

A：T

B：F

(3)、The first group is the thinnest because they do not have a healthy diet.

A：T

B：F

(4)、Normal mice usually live for two years.

A：T

B：F

(5)、The text tells us that people who eat less and exercise more will live longer.

A：T

B：F

What do we know about extracurricular activities in American high schools?

A．Students are united and work to reach the same goal.

B．There still exists prejudice and race discrimination.

C．Students from different races have equal access.

D．They are organized according to Allport's Theory.

What do we know about extracurricular activities in American high schools?

A．Students are united and work to reach the same goal.

B．There still exists prejudice and race discrimination.

C．Students from different races have equal access.

D．They are organized according to Allport's Theory.

听力原文： Lecturer: More and more American parents are becoming interested in having their children learn Chinese. This is not only a case of having their children attend private classes or of schools teaching the language instead of, or in addition to, the West European languages that are traditionally studied in the States, like Spanish, French and German. Oh, no. Studying geometry can be taxing for any 10-year-old, but at a select number of American schools, children are not only learning about angles, they are doing it in Chinese. This select number of schools is growing, since Chinese is a hot language thanks to China's surging economy and growing world clout. Even children as young as 6 are honing their Chinese at school, motivated by a mix of parental prodding and their own desire to do something different. I went to see one of these schools and it really is amazing when you walk into a kindergarten classroom, and the children are 'understanding what the teacher is saying and it's all in Chinese. Half of the time the kids aren't even aware that the teacher is speaking a different language. They just fall right into it.

The United States has declared this year to be the "Year of Languages", although few Americans are aware of the designation. According to a survey by the Language Association, more college students are studying foreign languages than ever before. Enrolment in Chinese has risen by 20 percent over the past 3 years. The 1.4 million students learning 15 leading languages represents a 17 percent increase over the same period. However, only 9.3 percent of Americans are able to speak a second tongue, compared to 52.7 percent of Europeans, according to the Census Bureau.

At first glance, weighty national priorities take a back seat to the fun of cultural exchange at Potomac Elementary. Hallways are festooned with Chinese art and learning aids, such as stuffed animals labelled with Chinese names. Children sing Chinese folk songs and American nursery rhymes in Chinese. In the fifth-grade immersion class, songs and games come only after a rigorous vocabulary drill and lessons on triangles and trapezoids-- all taught in Chinese. The students are good at listening and do pretty well at reading, but writing is their weak point, according to the class teacher, who has a Ph.D. in education and was a teacher in his native Beijing.

I asked two of the children--a boy and a girl--about their experiences of learning Chinese. The boy said that mastering Chinese characters was tough. When I asked why, he said that he finds the writing particularly hard because you have to do the strokes in the right order. The girl said that learning Chinese is "cool" and that she is starting to catch on to the complex writing system of characters that contain elements of meaning and sound. She pointed out that it is quite different to English because there's nothing like letters to refer to. However, she noted that she can remember how to write Coca-Cola in Chinese because it has a lot of little boxes that refer to a mouth. This visual aspect of Chinese characters and how it influences children when they are learning the language is a theme I'll return to later.

Even though it is clearly the parents who are pushing for more Chinese classes, my research revealed that they are not usually pushing their children too hard, which I think is a good thing. Parents of the kids say they are loathe to plan careers for 10 year olds. To quote one of them, "Even if my child doesn't use her Chinese going forward, she's learned so much about another culture." Some of the parents are encouraging their children--directly or indirectly--by taking night classes in Chinese. This has been proven to be a great motivator. If children see their parents learning something, they will usually take an interest in learning it too--or at least take a greater interest in learning generally.

Dr

Computers are now being pushed into schools. We know that multimedia will make 21 easy and fun. Children will happily learn from 22 characters while taught by expertly 23 software. Who needs teachers when you've got 24 education? These expensive toys are difficult to use in the classrooms and 25 extensive teacher training. Sure, kids love video games 26 think of your own experience : can you 27 even one educational filmstrip of many years ago? I'll 28 you remember the two or three great teachers who made a 29 in your life.

Then there's cyberbusiness, We're promised 30 catalog shopping - just point and click for great deals. We'll order airline tickets 31 the network, book restaurants and negotiate sales 32 Stores will become obsolete. So how come my local mall does more 33 in an afternoon than the entire Internet 34 in a month? Even if there were a trustworthy way to 35 money over the Internet, the network is 36 a most essential ingredient of trade and commerce : salespeople.

What's absent from this electronic wonderland? People contact. Computers and networks 37 us from one another. A network chat line is a limp 38 for meeting friends over coffee.No interactive multimedia display comes 39 to the excitement of a 40 concert. This virtual reality where frustration is legion and - in the holy names of Education and Progress - important aspects of human interactions are relentlessly devalued.

第 21 题

Scientists can learn about man by studying animals, such as mice, rats and monkeys. The scientists in a laboratory areexperimenting on mice and they are studying the relationship between diet and health. In this experiment, the scientists are studying the relationship between the amount of food the mice can eat and theirhealth. The mice are in three groups. All these groups are receiving the same healthy diet. But the amount of food that eachgroup is receiving is different. The first group is eating one cup of food each day, the second two cups, and the third threecups. After three years, the healthiest group is the one that is only eating one cup of food each day. The mice in this group arethinner than normal mice but they are more active. Most of the day, they are running, playing with one another, and using theequipment in their cages. Also, they are living longer. Mice usually live for two years, while most of the mice in this groupare still alive after three years. The second group of mice is of normal weight. They are healthy, too. They are active, but not as active as the thinnermice. But they are only living about two years. The last group of mice is receiving more food than the other two groups. Most of the day, these mice are eating orsleeping. They are not active. These mice are living longer than the scientists thought —about a year and a half, but they arenot healthy. The are sick more often than the other two groups. The first group is the thinnest mainly because

A.they run and play all day long

B.they eat only one cup of food a day

C.they live longer than the other groups

D.they are bored with the kind of food in the cup