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医学
A、One always knows what his muscles are doing. B、One performs simple actions without working. C、One’s muscles are used only to t
A、One always knows what his muscles are doing. B、One performs simple actions without working. C、One’s muscles are used only to t
admin
2013-12-14
34
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 hand at the correct spot. This automatic perception of the position of 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; they can stretch; and they can retract to their original position.
More than half of a person’s body is composed of muscle fibers, most of which are involuntary—in other words, work without conscious direction. 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.
Questions 26-30 are based on the passage you have just heard.
26. What does intelligent use of the muscles mean?
27. What is composed of more than half of a person’s body?
28. Why is an average woman weaker than an average man?
29. According to the selection, what is the muscular sense responsible for?
30. Which of the following is NOT the unique characteristic?
选项
A、One always knows what his muscles are doing.
B、One performs simple actions without working.
C、One’s muscles are used only to the extent necessary for each action they perform.
D、One improves muscular action consciously.
答案
C
解析
文中指出to the exact extent necessary for each action you perform,可知C项符合。to the extent某种程度。
转载请注明原文地址:https://kaotiyun.com/show/jKU3777K
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