联合国工业发展组织划分工业发展阶段的标准是（）。
A.工业总产值占国民收入的比重
B.工业净产值占国民收入的比重
C.工业总产值占国内生产总值的比重
D.工业净产值占国内生产总值的比重
参考答案：B
解析：联合国工业发展组织划分工业发展阶段的标准，是工业净产值占国民收入的比重。在农业经济阶段，该比重小于20％；在工业初兴阶段，该比重为20％～40％；在工业加速阶段，该比重大于40％。
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| On Christmas Eve, the Woods, an English couple, received a very unusual telephone call. Although it 1 only twenty seconds, it was from their fifteen-year-old daughter who disappeared six months before. "I'm phoning to 2 you a happy Christmas," she said."I love you." The Woods were so happy that they started a 3 telephone service called"Alive and Well". The service 4 parents to keep in touch with children who have run away from home. Young people can phone "Alive and Well" and leave a 5 for their parents. The 6 are answered by answering machines. 7 no one spoke to the child or make them 8 home. Parents of runaway children who are under eighteen can ask the 9 to bring their children home. So children do not want to tell their parents 10 they are. Through"Alive and Well" they can telephone their parents without 11 about letting their parents know their address. The Woods and their helpers 12 the telephone messages which are recorded by the tape and get in touch with the 13 . Many of the 30,000 British children who have left home are 14 in London. For only two pence they can go into a telephone box and 15 their parents. They can dial 756－7556 and stop their parents' worry. Is he dead or alive?  | ||||
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