2017年4月25日长沙gre作文机经.

　　考试时间：2011.4.25 下午一点

　　考试地点：长沙

　　Issue212-"If a goal is worthy, then any means taken to attain it is justifiable."

　　Argument53-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&apos 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 bore birth cause shyness during infancy and this shyness continues into later life.