Villages in (S1) _____ countries often lack many things, such as books, clean water, (S2) _____ These shortages are easy to see, but a (S3) _____ kind of shortage is not easy to see. That is a shortage of experts. Many villages have no doctors, engineers or (S4) _____ . They have no one who knows how to treat (S5) _____ medical problems or (S6) _____ a new energy system. There’s a way to (S7) _____ these problems. They can do it with computers.
In the past few years, computer specialists around the world have developed what they call expert systems. An expert system is a special kind of computer program. (S8) _____ . For example, an expert in medical system can help care of a sick person. A question appears on the computer screen, the person hot" You tell the computer whether yes or no. The computer asks other questions. "Has the person lost any blood .... Can the person move normally" You answer. (S9) _____ . Then it tells what medicine or other treatment is needed. In this way the expert system takes the place of a doctor. Another kind of expert system takes the place of an engineer. It measures the flow of water in river. (S10) _____ Still other kinds of expert systems help solve problems for farmers and owners of small businesses. S9
【参考答案】
The computer continues to ask questions until it has enough ......