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  3. Are you aware that you actually possess six senses? The sixth sense is a mus

Are you aware that you actually possess six senses? The sixth sense is a mus

游客2023-07-27  40
问题     Are you aware that you actually possess six senses? The sixth sense 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 is your muscular sense in action.
    Muscles are stringy bundles of fibers varying from one five-thousandth of an inch to about three inches. They have three unique characteristics: they can become shorter and thicker and 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 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. [br] According to this passage, 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 推理题。文章第二段第二句说明人的第六感指使肌肉精确运动的肌肉纤维。
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