按照建设项目的阶段划分，建设项目的咨询服务分为______。 A．前期咨询 B．实施

这是一部不朽的世界文学名作，它再现了古代希腊社会的图景，是研究早期希腊社会的重要史料。这部文学名作是

A．《荷马史诗》

B．《俄底浦斯王》

C．《天方夜谭》

D．《马可•波罗行纪》

阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。

C

When John was growing up, other kids felt sorry for him. His parents always had him weeding the garden, carrying out the garbage and delivering newspapers. But when John reached adulthood, he was better off than his childhood playmates. He had more job satisfaction, a better marriage and was healthier. Most of all, he was happier. Far happier.

These are the findings of a 40-year study that followed the lives of 456 teenage boys from Boston. The study showed that those who had worked as boys enjoyed happier and more productive lives than those who had not. “Boys who worked in the home or community gained competence (能力) and came to feel they were worthwhile members of society,” said George Vaillant, the psychologist (心理学家) who made the discovery. “And because they felt good about themselves, others felt good about them.”

Vaillant’s study followed these males in great detail. Interviews were repeated at ages 25, 31 and 47. Under Vaillant, the researchers compared the men’s mental-health scores with their boyhood-activity scores with their boyhood-activity scores. Points were awarded for part-time jobs, housework, effort in school, and ability to deal with problems.

The link between what the men had done as boys and how they turned out as adults was surprisingly sharp. Those who had done the most boyhood activities were twice as likely to have warm relations with a wide variety of people, five times as likely to be well paid and 16 times less likely to have been unemployed. The researchers also found that IQ and family social and economic class made no real difference in how the boys turned out. Working----at any age----is important. Childhood activities help a child develop responsibility, independence, confidence and competence---the underpinnings (基础) of emotional health. They also help him understand that people must cooperate and work toward common goals. The most competent adults are those who know how to do this. Yet work isn’t everything. As Tolstoy once said, “One can live magnificently in this world if one knows how to work and how to love, to work for the person one loves and to love one’s work.”

What does the underlined word “sharp” probably mean in Paragraph 4?（）

A. Quick to react

B. Having a thin edge

C. Clear and definite

D. sudden and rapid

男，89岁。久病卧床，近日来冷汗自出，四肢厥逆，面色苍百。西医枪查：血压60/35mmHg，听诊心音微弱。舌淡苔白，脉微欲绝。最佳选药是（）

A.肉桂

B.干姜

C.附子

D.细辛

E.吴茱萸

风机出现线路电压故障有哪些原因？

效度包括（）效度、（）效度和结构效度，它们分别从不同的方面反映测量的准确程度。