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Astronomers believe that the expanding universe is the result of an enormous and powerful explosion called the Big Bang. The Big Bang theory may explain how the universe formed. The Big Bang theory states that the universe began to expand with the explosion of concentrated matter and energy and has been expanding ever since. According to the theory, all the matter and energy in the universe was once concentrated into a single place. This place, of course, was extremely hot and dense. Then some 15 to 20 billion years ago, an explosion -- the Big Bang -- shot the concentrated matter and energy in all directions. The fastest moving matter traveled farthest away. Energy, too, began moving away from the area of the Big Bang.
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各国在公海上均可命令涉嫌从事海盗行为的船只停船而对其实行登临检查。
When (contented), and occasionally when (hunger), cats (frequently) make a strange (sound).（）
根据以下资料，回答下列问题。 2009年1-10月份，城镇固定资产投资150710亿元，同比增长33.1%，比上年同期加快5.9个百分点，比1-9月回落0.2个百分点。其中，国有及国有控股投资65418亿元，增长39.0%；房地产开发投资28440亿元，增长18.9%。 从项目隶属关系看，1-10月份，中央项目投资13502亿元，同比增长18.8%；地方项目投资137208亿元，增长34.8%。在注册类型中，1-10月份，内资企业投资138582亿元，同比增长36.7%；港澳台商投资5076亿元，增长0.8%；外商投资6218亿元，增长1.0%。 分产业看，1-10月份，第一产业投资增长54.1%，第二产业投资增长26.8%，第三产业投资增长37.8%。在行业中，1-10月份，煤炭开采及洗选业投资2349亿元，同比增长32.5%；电力、热力的生产与供应业投资8450亿元，增长21.1%；石油和天然气开采业投资1821亿元，下降5.9%；铁路运输业投资4055亿元，增长82.5%。 从施工和新开工项目情况看，1-10月份，累计施工项目402204个，同比增加95435个；施工项目计划总投资375859亿元，同比增长36.6%；新开工项目293412个，同比增加85329个；新开工项目计划总投资124610亿元，同比增长81.1%。 从到位资金情况看，1-10月份，到位资金171379亿元，同比增长39.9%。其中，国家预算内资金增长76.3%，国内贷款增长49.2%，自筹资金增长32.9%，利用外资下降12.9%。 2009年1-10月，石油和天然气投资同比减少了( )。
As they grow older, most people wonder how increasing age will affect intelligence. Can people in middle age and beyond expect to think as effectively and to solve problems as efficiently as they have in the pastOne of the difficulties in comparing the intellectual functioning of people at different ages is the problem of cohort((具有相同特征的)一群人) effects. Different age groups in the population have experienced different historical events (wars, exposure to television, and so on) as well as changes in the general standard of living. Different scores that people of varying ages achieve on intelligence tests could be partly due to changes in diet, housing, or health care or, even more likely, to the amount and quality of education. Since the beginning of this century, there has been a trend for more people to go to school and to remain in school longer. Because it eliminates these cohort effects, a longevous (长寿的) study may be the best way to look at age-related changes in intellectual functioning.One of the few longevous studies of intellectual functioning is the Seattle Longevous Study, conducted by K. Warner Schaie and his associates. The original subjects, who ranged in age from 18 to 67, have now been tested 4 times over a 21 year period. These results have given a reasonably good picture of longitudinal(纵向的) change in cognitive abilities.The data show that there are only trivial changes in the kinds of abilities measured by intelligence tests before the age of 60, and no reliable decrease can be shown in these abilities before age 74. Although there is some decrease in measured ability in the late 60s and the 70s, it is not until age 81 that the average person falls below the middle range of performance for young adults.The data from the Seattle Longevous Study also suggest that there are very great individual differences in intellectual change throughout adulthood. Between the ages of 74 and 81, less than half the subjects showed any significant change. One important factor is health, especially the presence or absence of coronary(冠状) heart disease. Another is a high socioeconomic status, which is related not only to higher initial levels of functioning but to the maintenance of a higher level throughout life.A flexible life style in middle age, probably associated with a flexible personality style, also tends to predict high performance in old age. While some of these variables may have substantial hereditary (遗传的) elements, changes in environment and education could also be important in maintaining a higher level of functioning for many individuals. The result of the Seattle Longevous Study shows that （）.
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