题目内容

In 1995 about 700,000 robots were operating in the industrialized world. Over 500,000 were used in Japan, about 120,000 in Western Europe, and about 60,000 in the United States. Many robot applications are for tasks that are either dangerous or unpleasant for human beings. In medical laboratories, robots handle potentially dangerous materials, such as blood or urine samples(尿样). In other cases, robots are used in repetitive, unchangeable tasks in which human performance might degrade over time. Robots can perform these repetitive, high-precision operations 24 hours a day without fatigue. A major user of robots is the automobile industry. General Motors Corporation uses approximately 16,000 robots for tasks such as spot welding(点焊), painting, machine loading, parts transfer, and assembly. Assembly is one of the fastest gnawing industrial applications of robotics. It requires higher precision than welding or painting and depends on low-cost sensor systems and powerful inexpensive computers. Robots are used in electronic assembly where they load microchips on circuit boards.Activities in environments that cause great danger to humans, such as locating sunken ships, cleanup of nuclear waste, exploring for underwater mineral deposits, and active volcano exploration, are ideally suited to robots. Similarly, robots can explore distant planets. NASA’s Galileo, an unmanned space probe, traveled to Jupiter in 1996 and performed tasks such as determining the chemical content of the Jovian atmosphere.Robots are being used to assist surgeons in installing artificial hips, and very high-precision robots can help surgeons with delicate operations on the human eye. Which of the following is the best topic about this article()

A. Robots
B. Uses of Robots
C. Development of Robots
D. Advantages of Robots

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Sports and games make our bodies strong, prevent us from getting too fat, and keep us healthy. But these are not their only use. They give us (36) practice in making eyes, brain and muscles work together. In tennis, our eyes see the ball coming, (37) its speed and direction and pass this information on to the brain. The brain then has to decide what to do, and to send its orders to the (38) of the arms, legs, and so on, so that the ball is met and hit back where it (39) to go. All this must happen with very great (40) , and only those who have had a lot of practice at tennis can carry out this complicated (41) of events successfully. For those who work with their brains most of the day, the practice of such skills is especially useful. Sports and games are also very useful for (42) . In their lessons at school, boys and girls may learn about such virtues as unselfishness, courage, (43) and love of one’s country; (44) .The ordinary day-school cannot give much practical training in living, (45) . So it is what the pupils do in their spare time that really prepares them to take their place in society as citizens when they grow up. (46) , he will later find it natural to work for the good of his country instead of only for his own benefit.

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