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河北省平山县2017高考英语一轮练习（6）及答案 【浙江省宁波市2017高考英语十校联考试题】 Imagine you’re in a dark room, running your fingers over a smooth surface in search of a single dot the size of this period, How high do you think the dot must be for your finger to feel it? Scientists have determined that the human finger is so sensitive it can detect a surface bump just one micron（l6m）"high． The human eyeby contrast, can't tell anything much smaller than100 microns．evolution: even the simplest single-celled living things can feel when something brushes up against them and will respond by moving closer or pulling away． t is the first sense aroused during a baby’s development and the last to weaken at life's peak． Patients in a deep coma （昏迷）who seem otherwise lost to the world will show skin reaction when touched by a nurse． “Touch ,is so central to what we are that we almost cannot imagine ourselves without it,” said Chris Djkerman．“It's 'not like eyesight, where you close your eyes and you don't see anything． You can't do tat with touch．It's always there．" Long igned in favor of the sensory heavyweights of eyesight and hearing, the study of touch lately:: has been gaining new concern among scientists．They're exploring the effects of recently reported false touch impressions, of people being made to feel as though they had three arms, for example, with the hope of gaining the true understanding of how the mind works． | 
