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It was very Aconsiderable Bof you Cto send me the information so Dpromptly.
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ABe sure to put out the light Bbefore you Cleave. Yes, Ill Dput out it.
Water
From the beginning, water has furnished (提供) man with a source of food and a highway to travel upon. The first civilizations arose __________ (51) water was a dominant element in the environment, a challenge __________ (52) man&39;s ingenuity(聪明，才智). The Egyptians invented the 365-day calendar in response to the Nile&39;s annual flooding. The Babylonians(巴比论人), __________ (53)
were among the most famous law-makers in ancient times, invented laws __________ (54) water usage. Water inspired the Chinese to build a 1,000- __________ (55) canal, a complex system which,after nearly 2,500 years, remains still practically __________ .(56) and still commands the astonishment of engineers. But __________(57) never found complete solutions to their water problems. The Yellow River is also known as "China&39;s Sorrow"; it is so unpredictable and dangerous__________(58) in a single flood it has caused a million __________ (59). Floods slowed the great__________ (60) of the Indus River Valley, and inadequate drainage ruined __________(61) of its land. Today water dominates man __________(62) it always has done. Its presence continues to__________(63) the location of his homes and cities; its violent variability(多变)can __________(64) man or his herds or his crops; its routes links him __________ (65) his fellows; its immense value may add to already dangerous political conflicts. There are many examples of this in our own time
____________ 查看材料
Biological Identification Technologies
When a person walks, the movement of his head, trunk, and limbs (肢体) are all reflected in changes in his body. A computer stores these __________ .(51) into a database (数据库). Later,the computer can accurately __________ (52) him according to these changes. This is a new biological identification __________ (53) and it can quickly identify an examinee without disturbing him.
Everybody&39;s voice is __________ (54).When a person&39;s voice is recorded by an instrument,his voice frequency spectrum (频谱) is called sound print. __________ .(55) a fingerprint,everybody&39;s sound print is different. How can a computer __________ (56)his sound？ First, his voice is recorded, __________ .(57) allows the computer to become familiar with his voice. It will then turn his sound characteristics into a series of digits (数字). These are the __________ (58)
on which the computer can distinguish his voice from another&39;s.
We often bring ID cards, work cards, or driving licenses with us to __________(59) our identity. If all these cards are forgotten or lost. How can we prove whom we are？ In __________(60), it&39;s not difficult to prove whom you are, __________(61) your body itself has identifying markers. Some are physiological (生理的) features, such as fingerprints, sounds, facial (面部) types and eye color. The computer can __________(62) to identify you. Suppose your features have already been __________(63)in the database. To identify you, we have to take your picture with a camera and send it to a computer for __________ (64). First, the computer needs to reposition this picture according to the position of your eyes, and then starts to read the __________(65) of your physiological features such as the ratio of your pupil to the whites of your eyes and the shape of your nose. Next, it seeks matching records from the database. Finally, it makes a decision.
_________ 查看材料
The Differences in Living Standards
The differences in living standards around the world are vast. In 1993, the average American had an income of about $25,000. In the same year, the average Mexican earned $7,000, and the average Nigerian earned $1,500. Not surprisingly, this large variation in average income is reflected in various measures of the quality of life. Changes in living standards over time are also large. In the United States, incomes have historically grown about 2 percent per year (after adjusting for changes in the cost of living). At this rate, average income doubles every 35 years. In some countries, economic growth has been even more rapid. In Japan, for instance, average income has doubled in the past 20 years, and in South Korea it has doubled in the past 10 years.
What explains these large differences in living standards among countries and over time？ The answer is surprisingly simple. Almost all variation in living standards is attributable to differences in countries&39; productivity- that is, the amount of goods and services produced from each hour of a worker&39;s time. In nations where workers can produce a large quantity of goods and services per unit of time, most people enjoy a high standard of living; in nations where workers are less productive, most people must endure a more meager existence. Similarly, the growth rate of a nation&39;s productivity determines the growth rate of its average income.
The fundamental relationship between productivity and living standards is simple, but its implications are far-reaching. If productivity is the primary determinant of living standards, other explanations must be of secondary importance. For example, people might think that labor unions or minimum-wage laws contributed to the rise in living standards of American workers over the past century. Yet the real hero of American workers is their rising productivity.
The relationship between productivity and living standards also has great implications for public policy. When thinking about how any policy will affect living standards, the key question is how it will affect our ability to produce goods and services. To improve living standards, policy makers need to raise productivity by ensuring that workers are well educated, have the tools needed to produce goods and services, and have access to the best available technology.
Which of the following countries has enjoyed the fastest economic growth in history？ 查看材料
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