2. 外语
  3. Are you aware that you actually possess six senses? The sixth is a muscular sense responsible for directing your muscles intelli

Are you aware that you actually possess six senses? The sixth is a muscular sense responsible for directing your muscles intelli

admin2012-10-23  39
问题     Are you aware that you actually possess six senses? The sixth is a muscular sense responsible for directing your muscles intelligently—to the exact extent necessary for each action you perform. For example,when you reach for an object,the sensory nerves linking the muscles to the brain stop your muscles in relation to the object in your muscular sense in action.
    Muscles are stringy bundles of fibers varying from one five-thousandth of all inch to about three inches. They have three unique characteristics:they can become shorter and thicker;they can stretch to their original position. Under a high-powered microscope,muscle tissue is seen as long,slender cells with a grainy texture like wood.
    More than half of a person’s body is composed of muscle fibers,most of which involuntary—in other words,work without conscious direction. The voluntary muscles,those that we move consciously to perform particular action,number more than five hundred. Women have only 60 to 70 percent as much muscle as men for their body mass. That is why an average woman can’t lift as much,throw as far,or hit as hard as an average man.
According to the selection,the muscular sense is responsible for_____.
选项 A、the efficiency of our muscle
B、the normal breathing function
C、the work of only our involuntary muscles
D、directing our muscles intelligently
答案D
解析 题目问：肌肉意识对什么负责?第六感是肌肉对你的肌肉智能的反应。“The sixth is a muscular senseresponsible for directing your muscles intelligently…”．通过此句话可知，据此判断，应选择D。
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