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The Greek philosopher Aristotle said that a persons highest happiness comes from the use of his or her intelligence. Religious books such as the Koran and Bible discuss faith as a form. of happiness. The British scientist Charles Darwin believed that all species were formed in a way so as to enjoy happiness. And, the United States declaration of independence guarantees "life, liberty and the pursuit of happiness as a basic human right". People throughout history may have had different ideas about happiness. But today, many people are still not very sure about it. Some findings are not surprising. For example, the database suggests that married people are happier than single people. People who like to be with other people are happier than unsocial people. People with children are equally happy as couples without children. And wealthier people are only a little happier than poorer people. This database also shows that studying happiness no longer involves just theories and ideas. Economists, psychiatrists, doctors and social scientists are finding ways of understanding happiness by examining real sets of information. Happiness is an extremely popular subject, if you search for "happiness" on the web site of the online bookseller, Amazon. com, you will find more than two hundred thousand results. Dan Gilbert teaches psychology at Harvard University in Massachusetts. He recently looks at the way the human mind is different from other animals because we can think about the future and use our imaginations. He also explains how our minds can trick us in a way that creates difficulties in making happy choices for the future. "Most of the time when people are wrong about how theyll feel about the future, theyre wrong in the direction of thinking that things will matter to them more than they really do. We are remarkable at our ability to adjust and a-dapt to almost any situation but we seem not to know this about ourselves. And so we mistakenly predict that good things will make us happy, really happy for a really long time. Bad things, why theyll just slay us. It turns out neither of these things is on the whole true. "The first paragraph in the passage is mainly talking about______.A．the importance of happinessB．the cause of happinessC．the meaning of happinessD．people who are happy

()折扣即根据购买者购买数量的大小给予不同的折扣。

平面运动刚体在某瞬时为瞬时平动时，其角速度ω和角加速度a是：（）

股份有限公司有下列( )情况之一时，应当在两个月内召开临时股东大会。 A．董事人数不足公司法规定的人数或公司章程规定人数的2/3时 B．公司未弥补的亏损达实收股本总额1/3时 C．单独或者合计持有公司10%以上股份的股东请求时 D．监事会提议召开时

卷材防水屋面的构造层次有＿＿＿＿＿＿＿＿。【】

定时限过电流保护的动作电流值是按线路未端短路电流整定的。（）

若企业集团是企业法人，其核心企业和成员企业也具有法人资格。（）

目前普遍应用的振动式电喇叭，是利用（）的变化吸动振动盘发生声频振动来发出声波的。

物体所具有的反抗改变原有运动状态的物理性质称为（）。