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北京鼎均gre作文机经

发布时间：2016-03-01 编辑：查字典英语网小编

　　Technologies not only influence but actually determine social customs and ethics.

　　In most professions and academic fields, imagination is more important than knowledge.

　　Argument：

　　Thirteen years ago, researchers studied a group of 25 infants who showed signs of mild distress when exposed to unfamiliar stimuli such as an unusual odor or a tape recording of an unknown voice. They discovered that these infants were more likely than other infants to have been conceived in early autumn, a time when their mothers production of melatonin ― a hormone known to affect some brain functions ― would naturally increase in response to decreased daylight. In a follow-up study conducted earlier this year, more than half of these children ― now teenagers ― who had shown signs of distress identified themselves as shy. Clearly, increased levels of melatonin before birth cause shyness during infancy and this shyness continues into later life.

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