单项选择题

According to this passage, the muscular sense is responsible for ______.

A．the efficiency of our muscle
B．the normal breathing function
C．the work of only our involuntary muscles
D．directing our muscles intelligently
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单项选择题
An average woman is weaker than an average man because she has ______.
A．the muscular sense more important than any other sense
B．less muscle than men for her body mass
C．60 to 70 percent less muscle for her body mass
D．less muscle fiber for her body weight
单项选择题
According to this passage, more than haft of a person's body is composed of ______.
A．involuntary muscles
B．muscle fibers
C．voluntary muscles
D．sensory nerves
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