2015柳州市高考英语阅读理解一轮课外训练训练（5）及答案
【浙江省宁波市2014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（l0－6m）"high． The human eye, by contrast, can't tell anything much smaller than100 microns．No wonder we rely on touch rather than eyesight when faced with a new roll of toilet paper．
Biologically, touch is the mother of all sensory（感觉的） systems．It is an ancient sense in 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． It 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
